Bump version: 5.3 → 5.4

Better CORS support

.bumpversion.cfg

@@ -1,16 +1,39 @@
 [bumpversion]
 commit = True
 tag = True
-current_version = 0.36
-parse = (?P<major>\d+)\.(?P<minor>\d+)(\.(?P<patch>\d+)(\-(?P<release>[a-z]+))?)?
+current_version = 5.4
+parse = (?P<major>\d+)\.(?P<minor>\d+)
 serialize = 
 	{major}.{minor}
 
-[bumpversion:file:src/config.h]
-search = VERSION "{current_version}"
-replace = VERSION "{new_version}"
+[bumpversion:file:src/libs/config.h]
+parse = (?P<major>\d+)
+serialize = {major}
+search = VERSION_MAJOR {current_version}
+replace = VERSION_MAJOR {new_version}
 
-[bumpversion:file:PKGBUILD]
+[bumpversion:file:./src/libs/config.h]
+parse = <major>\d+\.(?P<minor>\d+)
+serialize = {minor}
+search = VERSION_MINOR {current_version}
+replace = VERSION_MINOR {new_version}
+
+[bumpversion:file:python/setup.py]
+search = version="{current_version}"
+replace = version="{new_version}"
+
+[bumpversion:file:pkg/arch/PKGBUILD]
 search = pkgver={current_version}
 replace = pkgver={new_version}
 
+[bumpversion:file:pkg/openwrt/Makefile]
+search = PKG_VERSION:={current_version}
+replace = PKG_VERSION:={new_version}
+
+[bumpversion:file:man/ustreamer.1]
+search = "version {current_version}"
+replace = "version {new_version}"
+
+[bumpversion:file:man/ustreamer-dump.1]
+search = "version {current_version}"
+replace = "version {new_version}"

.dockerignore

@@ -0,0 +1,9 @@
+# Ignore everything
+*
+
+# Allow source code
+!Makefile
+!src/**
+!python/**
+!janus/**
+!man/**

.editorconfig

@@ -0,0 +1,10 @@
+root = true
+
+[*]
+end_of_file = lf
+indent_style = tab
+indent_size = 4
+
+[*.{py,yaml}]
+indent_style = space
+indent_size = 4

.gitattributes

@@ -0,0 +1,5 @@
+/.github/ export-ignore
+/.bumpversion.cfg export-ignore
+/.dockerignore export-ignore
+/.gitattributes export-ignore
+/.gitignore export-ignore

.github/FUNDING.yml

@@ -0,0 +1,4 @@
+# These are supported funding model platforms
+
+patreon: pikvm
+#custom: https://www.paypal.me/mdevaev

.github/workflows/dockerimage.yml

@@ -0,0 +1,20 @@
+name: CI
+
+on:
+    push:
+        branches: [master]
+    pull_request:
+        branches: [master]
+
+jobs:
+    build:
+        runs-on: ubuntu-latest
+
+        steps:
+          - uses: actions/checkout@v2
+
+          - name: Building linters image ...
+            run: make linters
+
+          - name: Running linters ...
+            run: make tox

.gitignore

@@ -1,8 +1,17 @@
-/pkg/
-/src/ustreamer-*/
-/src/v*.tar.gz
-/v*.tar.gz
-/ustreamer-*.pkg.tar.xz
-/vgcore.*
+/linters/.tox/
+/linters/.mypy_cache/
+/pkg/arch/pkg/
+/pkg/arch/src/
+/src/build/
+/python/build/
+/janus/build/
 /ustreamer
-*.o
+/ustreamer-dump
+/config.mk
+vgcore.*
+*.sock
+*.so
+*.bin
+*.pkg.tar.xz
+*.pkg.tar.zst
+*.tar.gz

Makefile

@@ -1,63 +1,127 @@
+-include config.mk
+
 DESTDIR ?=
 PREFIX ?= /usr/local
+MANPREFIX ?= $(PREFIX)/share/man
+
+CC ?= gcc
+PY ?= python3
 CFLAGS ?= -O3
 LDFLAGS ?=
 
+RPI_VC_HEADERS ?= /opt/vc/include
+RPI_VC_LIBS ?= /opt/vc/lib
+
+export
+
+_LINTERS_IMAGE ?= ustreamer-linters
+
 
 # =====
-CC = gcc
-LIBS = -lm -ljpeg -pthread -levent -levent_pthreads -luuid
-override CFLAGS += -c -std=c99 -Wall -Wextra -D_GNU_SOURCE
-SOURCES = $(shell ls src/*.c src/jpeg/*.c)
-OBJECTS = $(SOURCES:.c=.o)
-PROG = ustreamer
+define optbool
+$(filter $(shell echo $(1) | tr A-Z a-z), yes on 1)
+endef
 
 
-ifeq ($(shell ls -d /opt/vc/include 2>/dev/null), /opt/vc/include)
-SOURCES += $(shell ls src/omx/*.c)
-LIBS += -lbcm_host -lvcos -lopenmaxil -L/opt/vc/lib
-override CFLAGS += -DOMX_ENCODER -DOMX_SKIP64BIT -I/opt/vc/include
+# =====
+all:
+	+ $(MAKE) apps
+ifneq ($(call optbool,$(WITH_PYTHON)),)
+	+ $(MAKE) python
+endif
+ifneq ($(call optbool,$(WITH_JANUS)),)
+	+ $(MAKE) janus
 endif
 
 
-# =====
-all: $(SOURCES) $(PROG)
+apps:
+	$(MAKE) -C src
+	@ ln -sf src/ustreamer.bin ustreamer
+	@ ln -sf src/ustreamer-dump.bin ustreamer-dump
 
 
-install: $(PROG)
-	install -Dm755 $(PROG) $(DESTDIR)$(PREFIX)/bin/$(PROG)
+python:
+	$(MAKE) -C python
+	@ ln -sf python/build/lib.*/*.so .
+
+
+janus:
+	$(MAKE) -C janus
+	@ ln -sf janus/*.so .
+
+
+install: all
+	$(MAKE) -C src install
+ifneq ($(call optbool,$(WITH_PYTHON)),)
+	$(MAKE) -C python install
+endif
+ifneq ($(call optbool,$(WITH_JANUS)),)
+	$(MAKE) -C janus install
+endif
+	mkdir -p $(DESTDIR)$(MANPREFIX)/man1
+	for man in $(shell ls man); do \
+		install -m644 man/$$man $(DESTDIR)$(MANPREFIX)/man1/$$man; \
+		gzip -f $(DESTDIR)$(MANPREFIX)/man1/$$man; \
+	done
+
+
+install-strip: install
+	$(MAKE) -C src install-strip
 
 
 regen:
-	tools/make-jpeg-h.py src/data/blank.jpeg src/data/blank_jpeg.h BLANK 640 480
-	tools/make-html-h.py src/data/index.html src/data/index_html.h HTML_INDEX_PAGE
-
-
-$(PROG): $(OBJECTS)
-	$(CC) $(LIBS) $(LDFLAGS) $(OBJECTS) -o $@
-
-
-.c.o:
-	$(CC) $(LIBS) $(CFLAGS) $< -o $@
+	tools/$(MAKE)-jpeg-h.py src/ustreamer/data/blank.jpeg src/ustreamer/data/blank_jpeg.c BLANK
+	tools/$(MAKE)-html-h.py src/ustreamer/data/index.html src/ustreamer/data/index_html.c INDEX
 
 
 release:
-	make clean
-	make push
-	make bump
-	make push
-	make clean
+	$(MAKE) clean
+	$(MAKE) tox
+	$(MAKE) push
+	$(MAKE) bump V=$(V)
+	$(MAKE) push
+	$(MAKE) clean
+
+
+tox: linters
+	time docker run --rm \
+			--volume `pwd`:/src:ro \
+			--volume `pwd`/linters:/src/linters:rw \
+		-t $(_LINTERS_IMAGE) bash -c " \
+			cd /src \
+			&& tox -q -c linters/tox.ini $(if $(E),-e $(E),-p auto) \
+		"
+
+
+linters:
+	docker build \
+			$(if $(call optbool,$(NC)),--no-cache,) \
+			--rm \
+			--tag $(_LINTERS_IMAGE) \
+		-f linters/Dockerfile linters
 
 
 bump:
-	bumpversion minor
+	bumpversion $(if $(V),$(V),minor)
 
 
 push:
 	git push
 	git push --tags
 
-clean-all: clean
+
+clean-all: linters clean
+	- docker run --rm \
+			--volume `pwd`:/src \
+		-it $(_LINTERS_IMAGE) bash -c "cd src && rm -rf linters/{.tox,.mypy_cache}"
+
+
 clean:
-	rm -f src/*.o src/{jpeg,omx}/*.o vgcore.* $(PROG)
-	rm -rf pkg src/$(PROG)-* src/v*.tar.gz v*.tar.gz $(PROG)-*.pkg.tar.xz
+	rm -rf pkg/arch/pkg pkg/arch/src pkg/arch/v*.tar.gz pkg/arch/ustreamer-*.pkg.tar.{xz,zst}
+	rm -f ustreamer ustreamer-dump *.so
+	$(MAKE) -C src clean
+	$(MAKE) -C python clean
+	$(MAKE) -C janus clean
+
+
+.PHONY: python janus linters

PKGBUILD

@@ -1,30 +0,0 @@
-# Contributor: Maxim Devaev <mdevaev@gmail.com>
-# Author: Maxim Devaev <mdevaev@gmail.com>
-
-
-pkgname=ustreamer
-pkgver=0.36
-pkgrel=1
-pkgdesc="Lightweight and fast MJPG-HTTP streamer"
-url="https://github.com/pi-kvm/ustreamer"
-license=(GPL)
-arch=(i686 x86_64 armv6h armv7h)
-depends=(libjpeg libevent libutil-linux)
-# optional: raspberrypi-firmware for OMX JPEG compressor
-makedepends=(gcc make)
-source=("$url/archive/v$pkgver.tar.gz")
-md5sums=(SKIP)
-
-
-build() {
-	cd $srcdir
-	rm -rf $pkgname-build
-	cp -r ustreamer-$pkgver $pkgname-build
-	cd $pkgname-build
-	make CFLAGS="$CFLAGS" LDFLAGS="$LDFLAGS" $MAKEFLAGS
-}
-
-package() {
-	cd $srcdir/$pkgname-build
-	make DESTDIR="$pkgdir" PREFIX=/usr install
-}

README.md

@@ -1,31 +1,33 @@
 # µStreamer
+[![CI](https://github.com/pikvm/ustreamer/workflows/CI/badge.svg)](https://github.com/pikvm/ustreamer/actions?query=workflow%3ACI)
+[![Discord](https://img.shields.io/discord/580094191938437144?logo=discord)](https://discord.gg/bpmXfz5)
+
 [[Русская версия]](README.ru.md)
 
-µStreamer is a lightweight and very quick server to broadcast [MJPG](https://en.wikipedia.org/wiki/Motion_JPEG) video from any V4L2 device to the net. All new browsers have native support of this video format, as well as most video players such as mplayer, VLC etc.
-µStreamer is a part of the [Pi-KVM](https://github.com/pi-kvm) project designed to stream [VGA](https://www.amazon.com/dp/B0126O0RDC) and [HDMI](https://auvidea.com/b101-hdmi-to-csi-2-bridge-15-pin-fpc/) screencast hardware data with the highest resolution and FPS possible.
+µStreamer is a lightweight and very quick server to stream [MJPEG](https://en.wikipedia.org/wiki/Motion_JPEG) video from any V4L2 device to the net. All new browsers have native support of this video format, as well as most video players such as mplayer, VLC etc.
+µStreamer is a part of the [Pi-KVM](https://github.com/pikvm/pikvm) project designed to stream [VGA](https://www.amazon.com/dp/B0126O0RDC) and [HDMI](https://auvidea.com/b101-hdmi-to-csi-2-bridge-15-pin-fpc/) screencast hardware data with the highest resolution and FPS possible.
 
 µStreamer is very similar to [mjpg-streamer](https://github.com/jacksonliam/mjpg-streamer) with ```input_uvc.so``` and ```output_http.so``` plugins, however, there are some major differences. The key ones are:
 
 | **Feature** | **µStreamer** | **mjpg-streamer** |
 |----------|---------------|-------------------|
-| Multithreaded JPEG encoding | ![#00aa00](https://placehold.it/15/00aa00/000000?text=+) Yes | ![#f03c15](https://placehold.it/15/f03c15/000000?text=+) No |
-| [OpenMAX IL](https://www.khronos.org/openmaxil) hardware acceleration<br>on Raspberry Pi | ![#00aa00](https://placehold.it/15/00aa00/000000?text=+) Yes | ![#f03c15](https://placehold.it/15/f03c15/000000?text=+) No |
-| Behavior when the device<br>is disconnected while streaming | ![#00aa00](https://placehold.it/15/00aa00/000000?text=+) Shows a black screen<br>with ```NO SIGNAL``` on it<br>until reconnected | ![#f03c15](https://placehold.it/15/f03c15/000000?text=+) Stops the broadcast<sup>1</sup> |
-| [DV-timings](https://linuxtv.org/downloads/v4l-dvb-apis/uapi/v4l/dv-timings.html) support -<br>the ability to change resolution<br>on the fly by source signal | ![#00aa00](https://placehold.it/15/00aa00/000000?text=+) Yes | ![#ffaa00](https://placehold.it/15/ffaa00/000000?text=+) Partially yes <sup>1</sup> |
-| Option to skip frames when streaming<br>static images by HTTP to save traffic | ![#00aa00](https://placehold.it/15/00aa00/000000?text=+) Yes <sup>2</sup> | ![#f03c15](https://placehold.it/15/f03c15/000000?text=+) No |
-| Debug logs without recompiling,<br>performance statistics log,<br>access to HTTP broadcast parameters | ![#00aa00](https://placehold.it/15/00aa00/000000?text=+) Yes | ![#f03c15](https://placehold.it/15/f03c15/000000?text=+) No |
-| Supported input devices | ![#ffaa00](https://placehold.it/15/ffaa00/000000?text=+) YUYV, UYVY,<br>RGB565, ~~MJPG~~ <sup>3</sup> | ![#00aa00](https://placehold.it/15/00aa00/000000?text=+) YUYV, UYVY,<br>RGB565, MJPG |
-| Access to webcam controls (focus, servos)<br>and settings such as brightness via HTTP | ![#f03c15](https://placehold.it/15/f03c15/000000?text=+) No | ![#00aa00](https://placehold.it/15/00aa00/000000?text=+) Yes |
-| Option to serve files<br>with a built-in HTTP server, auth settings | ![#f03c15](https://placehold.it/15/f03c15/000000?text=+) No <sup>4</sup> | ![#00aa00](https://placehold.it/15/00aa00/000000?text=+) Yes |
+| Multithreaded JPEG encoding | ✔ | ✘ |
+| Hardware image encoding<br>on Raspberry Pi | ✔ | ✘ |
+| Behavior when the device<br>is disconnected while streaming | ✔ Shows a black screen<br>with ```NO SIGNAL``` on it<br>until reconnected | ✘ Stops the streaming <sup>1</sup> |
+| [DV-timings](https://linuxtv.org/downloads/v4l-dvb-apis-new/userspace-api/v4l/dv-timings.html) support -<br>the ability to change resolution<br>on the fly by source signal | ✔ | ☹ Partially yes <sup>1</sup> |
+| Option to skip frames when streaming<br>static images by HTTP to save the traffic | ✔ <sup>2</sup> | ✘ |
+| Streaming via UNIX domain socket | ✔ | ✘ |
+| Systemd socket activation | ✔ | ✘ |
+| Debug logs without recompiling,<br>performance statistics log,<br>access to HTTP streaming parameters | ✔ | ✘ |
+| Option to serve files<br>with a built-in HTTP server | ✔ | ☹ Regular files only |
+| Signaling about the stream state<br>on GPIO using [libgpiod](https://git.kernel.org/pub/scm/libs/libgpiod/libgpiod.git/about) | ✔ | ✘ |
+| Access to webcam controls (focus, servos)<br>and settings such as brightness via HTTP | ✘ | ✔ |
+| Compatibility with mjpg-streamer's API | ✔ | :) |
 
 Footnotes:
   * ```1``` Long before µStreamer, I made a [patch](https://github.com/jacksonliam/mjpg-streamer/pull/164) to add DV-timings support to mjpg-streamer and to keep it from hanging up no device disconnection. Alas, the patch is far from perfect and I can't guarantee it will work every time - mjpg-streamer's source code is very complicated and its structure is hard to understand. With this in mind, along with needing multithreading and JPEG hardware acceleration in the future, I decided to make my own stream server from scratch instead of supporting legacy code.
-  
-  * ```2``` This feature allows to cut down outgoing traffic several-fold when broadcasting HDMI, but it increases CPU usage a little bit. The idea is that HDMI is a fully digital interface and each captured frame can be identical to the previous one byte-wise. There's no need to broadcast the same image over the net several times a second. With the `--drop-same-frames=20` option enabled, µStreamer will drop all the matching frames (with a limit of 20 in a row). Each new frame is matched with the previous one first by length, then using ```memcmp()```.
 
-  * ```3``` As µStreamer was made mainly to be used with screencast hardware it supports video formats they usually need. MJPG input means that the screencast device can compress images to JPEG and feed it to the software, which allows to cut down CPU usage and avoid software image encoding. This video format is supported by most webcams, but I've never seen it supported by screencast hardware: neither [Auvidea B101](https://auvidea.com/b101-hdmi-to-csi-2-bridge-15-pin-fpc/), nor [EasyCap UTV 007](https://www.amazon.com/dp/B0126O0RDC) offer such support. It's not hard to add hardware MJPG sources support, it's just not done yet.
-
-  * ```4``` ...and there'll never be. µStreamer is designed UNIX-way, so if you need a small website with your broadcast, install NGINX.
+  * ```2``` This feature allows to cut down outgoing traffic several-fold when streaming HDMI, but it increases CPU usage a little bit. The idea is that HDMI is a fully digital interface and each captured frame can be identical to the previous one byte-wise. There's no need to stream the same image over the net several times a second. With the `--drop-same-frames=20` option enabled, µStreamer will drop all the matching frames (with a limit of 20 in a row). Each new frame is matched with the previous one first by length, then using ```memcmp()```.
 
 -----
 # TL;DR
@@ -33,41 +35,105 @@ If you're going to live-stream from your backyard webcam and need to control it,
 
 -----
 # Building
-You'll need  ```make```, ```gcc```, ```libevent``` with ```pthreads``` support, ```libjpeg8```/```libjpeg-turbo``` and ```libuuid```.
+You'll need  ```make```, ```gcc```, ```libevent``` with ```pthreads``` support, ```libjpeg9```/```libjpeg-turbo``` and ```libbsd``` (only for Linux).
 
-It should compile automatically with OpenMAX IL on Raspberry Pi, if the corresponding headers are present in ```/opt/vc/include```.
+* Arch: `sudo pacman -S libevent libjpeg-turbo libutil-linux libbsd`.
+* Raspbian: `sudo apt install libevent-dev libjpeg8-dev libbsd-dev`. Add `libgpiod-dev` for `WITH_GPIO=1` and `libsystemd-dev` for `WITH_SYSTEMD=1`.
+* Debian/Ubuntu: `sudo apt install build-essential libevent-dev libjpeg-dev libbsd-dev`.
+* Alpine: `sudo apk add libevent-dev libbsd-dev libjpeg-turbo-dev musl-dev`. Build with `WITH_PTHREAD_NP=0`.
+
+To enable GPIO support install [libgpiod](https://git.kernel.org/pub/scm/libs/libgpiod/libgpiod.git/about) and pass option ```WITH_GPIO=1```. If the compiler reports about a missing function ```pthread_get_name_np()``` (or similar), add option ```WITH_PTHREAD_NP=0``` (it's enabled by default). For the similar error with ```setproctitle()``` add option ```WITH_SETPROCTITLE=0```.
 
 ```
-$ git clone --depth=1 https://github.com/pi-kvm/ustreamer
+$ git clone --depth=1 https://github.com/pikvm/ustreamer
 $ cd ustreamer
 $ make
 $ ./ustreamer --help
 ```
 
-AUR has a package for Arch Linux: https://aur.archlinux.org/packages/ustreamer
+AUR has a package for Arch Linux: https://aur.archlinux.org/packages/ustreamer.
+
+FreeBSD port: https://www.freshports.org/multimedia/ustreamer.
 
 -----
 # Usage
-Without arguments, ```ustreamer``` will try to open ```/dev/video0``` with 640x480 resolution and start broadcasting on  ```http://127.0.0.1:8080```. You can override this behavior using parameters ```--device```, ```--host``` and ```--port```. For example, to broadcast to the world, run:
+**For M2M hardware encoding on Raspberry Pi, you need at least 5.15.32 kernel. OpenMAX and MMAL support on older kernels is deprecated and removed.**
+
+Without arguments, ```ustreamer``` will try to open ```/dev/video0``` with 640x480 resolution and start streaming on  ```http://127.0.0.1:8080```. You can override this behavior using parameters ```--device```, ```--host``` and ```--port```. For example, to stream to the world, run:
 ```
 # ./ustreamer --device=/dev/video1 --host=0.0.0.0 --port=80
 ```
 
+:exclamation: Please note that since µStreamer v2.0 cross-domain requests were disabled by default for [security reasons](https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS). To enable the old behavior, use the option `--allow-origin=\*`.
+
 The recommended way of running µStreamer with [Auvidea B101](https://www.raspberrypi.org/forums/viewtopic.php?f=38&t=120702&start=400#p1339178) on Raspberry Pi:
 ```bash
 $ ./ustreamer \
     --format=uyvy \ # Device input format
-    --encoder=omx \ # Hardware encoding with OpenMAX
-    --dv-timings \ # use DV-timings
-    --quality=20 \ # OpenMAX has a non-linear quality scale
-    --drop-same-frames=30 # Save that traffic
+    --encoder=m2m-image \ # Hardware encoding on V4L2 M2M driver
+    --workers=3 \ # Workers number
+    --persistent \ # Don't re-initialize device on timeout (for example when HDMI cable was disconnected)
+    --dv-timings \ # Use DV-timings
+    --drop-same-frames=30 # Save the traffic
 ```
 
+:exclamation: Please note that to use `--drop-same-frames` for different browsers you need to use some specific URL `/stream` parameters (see URL `/` for details).
+
 You can always view the full list of options with ```ustreamer --help```.
 
+-----
+# Raspberry Pi Camera Example
+Example usage for the Raspberry Pi v1 camera:
+```bash
+$ sudo modprobe bcm2835-v4l2
+$ ./ustreamer --host :: -m jpeg --device-timeout=5 --buffers=3 -r 2592x1944
+```
+
+:exclamation: Please note that newer camera models have a different maximum resolution. You can see the supported resolutions at the [PiCamera documentation](https://picamera.readthedocs.io/en/release-1.13/fov.html#sensor-modes).
+
+:exclamation: If you get a poor framerate, it could be that the camera is switched to photo mode, which produces a low framerate (but a higher quality picture). This is because `bcm2835-v4l2` switches to photo mode at resolutions higher than `1280x720`. To work around this, pass the `max_video_width` and `max_video_height` module parameters like so:
+
+```bash
+$ modprobe bcm2835-v4l2 max_video_width=2592 max_video_height=1944
+```
+
+-----
+# Integrations
+
+## Janus
+µStreamer supports bandwidth-efficient streaming using [H.264 compression](https://en.wikipedia.org/wiki/Advanced_Video_Coding) and the Janus WebRTC server. See the [Janus integration guide](docs/h264.md) for full details.
+
+## Nginx
+When uStreamer is behind an Nginx proxy, it's buffering behavior introduces latency into the video stream. It's possible to disable Nginx's buffering to eliminate the additional latency:
+
+```nginx
+location /stream {
+    postpone_output 0;
+    proxy_buffering off;
+    proxy_ignore_headers X-Accel-Buffering;
+    proxy_pass http://ustreamer;
+}
+```
+
+-----
+# Tips & tricks for v4l2
+v4l2 utilities provide the tools to manage USB webcam setting and information. Scripts can be use to make adjustments and run manually or with cron. Running in cron for example to change the exposure settings at certain times of day. The package is available in all Linux distributions and is usually called `v4l-utils`.
+
+* List of available video devices: `v4l2-ctl --list-devices`.
+* List available control settings: `v4l2-ctl -d /dev/video0 --list-ctrls`.
+* List available video formats: `v4l2-ctl -d /dev/video0 --list-formats-ext`.
+* Read the current setting: `v4l2-ctl -d /dev/video0 --get-ctrl=exposure_auto`.
+* Change the setting value: `v4l2-ctl -d /dev/video0 --set-ctrl=exposure_auto=1`.
+
+[Here](https://www.kurokesu.com/main/2016/01/16/manual-usb-camera-settings-in-linux/) you can find more examples. Documentation is available in [`man v4l2-ctl`](https://www.mankier.com/1/v4l2-ctl).
+
+-----
+# See also
+* [Running uStreamer via systemd service](https://github.com/pikvm/ustreamer/issues/16).
+
 -----
 # License
-Copyright (C) 2018 by Maxim Devaev mdevaev@gmail.com
+Copyright (C) 2018-2022 by Maxim Devaev mdevaev@gmail.com
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by

README.ru.md

@@ -1,73 +1,135 @@
-# µStreamer 
+# µStreamer
+[![CI](https://github.com/pikvm/ustreamer/workflows/CI/badge.svg)](https://github.com/pikvm/ustreamer/actions?query=workflow%3ACI)
+[![Discord](https://img.shields.io/discord/580094191938437144?logo=discord)](https://discord.gg/bpmXfz5)
+
 [[English version]](README.md)
 
 
-µStreamer - это маленький и очень быстрый сервер, который позволяет организовать трансляцию видео в формате [MJPG](https://en.wikipedia.org/wiki/Motion_JPEG) с любого устройства V4L2 в сеть. Этот формат нативно поддерживается всеми современными браузерами и большинством приложений для просмотра видео (mplayer, VLC и так далее). µStreamer был разработан в рамках проекта [Pi-KVM](https://github.com/pi-kvm) специально для стриминга с устройств видеозахвата [VGA](https://www.amazon.com/dp/B0126O0RDC) и [HDMI](https://auvidea.com/b101-hdmi-to-csi-2-bridge-15-pin-fpc/) с максимально возможным разрешением и FPS, которые только позволяет железо.
+µStreamer - это маленький и очень быстрый сервер, который позволяет организовать трансляцию видео в формате [MJPEG](https://en.wikipedia.org/wiki/Motion_JPEG) с любого устройства V4L2 в сеть. Этот формат нативно поддерживается всеми современными браузерами и большинством приложений для просмотра видео (mplayer, VLC и так далее). µStreamer был разработан в рамках проекта [Pi-KVM](https://github.com/pikvm/pikvm) специально для стриминга с устройств видеозахвата [VGA](https://www.amazon.com/dp/B0126O0RDC) и [HDMI](https://auvidea.com/b101-hdmi-to-csi-2-bridge-15-pin-fpc/) с максимально возможным разрешением и FPS, которые только позволяет железо.
 
 Функционально µStreamer очень похож на [mjpg-streamer](https://github.com/jacksonliam/mjpg-streamer) при использовании им плагинов ```input_uvc.so``` и ```output_http.so```, однако имеет ряд серьезных отличий. Основные приведены в этой таблице:
 
 | **Фича** | **µStreamer** | **mjpg-streamer** |
 |----------|---------------|-------------------|
-| Многопоточное кодирование JPEG | ![#00aa00](https://placehold.it/15/00aa00/000000?text=+) Есть | ![#f03c15](https://placehold.it/15/f03c15/000000?text=+) Нет |
-| Аппаратное кодирование с помощью [OpenMAX IL](https://www.khronos.org/openmaxil) на Raspberry Pi | ![#00aa00](https://placehold.it/15/00aa00/000000?text=+) Есть | ![#f03c15](https://placehold.it/15/f03c15/000000?text=+) Нет |
-| Поведение при физическом отключении устройства<br>от сервера во время работы | ![#00aa00](https://placehold.it/15/00aa00/000000?text=+) Транслирует черный экран<br>с надписью ```NO SIGNAL```,<br>пока устройство не будет подключено снова | ![#f03c15](https://placehold.it/15/f03c15/000000?text=+) Прерывает трансляцию <sup>1</sup> |
-| Поддержка [DV-таймингов](https://linuxtv.org/downloads/v4l-dvb-apis/uapi/v4l/dv-timings.html) - возможности изменения <br>параметров разрешения трансляции на лету<br>по сигналу источника (устройства видеозахвата) | ![#00aa00](https://placehold.it/15/00aa00/000000?text=+) Есть | ![#ffaa00](https://placehold.it/15/ffaa00/000000?text=+) Условно есть <sup>1</sup> |
-| Возможность пропуска фреймов при передаче<br>статического изображения по HTTP<br>для экономии трафика | ![#00aa00](https://placehold.it/15/00aa00/000000?text=+) Есть <sup>2</sup> | ![#f03c15](https://placehold.it/15/f03c15/000000?text=+) Нет |
-| Дебаг-логи без перекомпиляции,<br>логгирование статистики производительности,<br>возможность получения параметров<br>трансляции по HTTP | ![#00aa00](https://placehold.it/15/00aa00/000000?text=+) Есть | ![#f03c15](https://placehold.it/15/f03c15/000000?text=+) Нет |
-| Поддерживаемые входные форматы устройств | ![#ffaa00](https://placehold.it/15/ffaa00/000000?text=+) YUYV, UYVY,<br>RGB565, ~~MJPG~~ <sup>3</sup> | ![#00aa00](https://placehold.it/15/00aa00/000000?text=+) YUYV, UYVY,<br>RGB565, MJPG |
-| Поддержка контролов веб-камер (фокус,<br> движение сервами) и всяких настроек,<br> типа яркости, через HTTP | ![#f03c15](https://placehold.it/15/f03c15/000000?text=+) Нет | ![#00aa00](https://placehold.it/15/00aa00/000000?text=+) Есть |
-| Возможность сервить файлы встроенным<br>HTTP-сервером, настройки авторизации | ![#f03c15](https://placehold.it/15/f03c15/000000?text=+) Нет <sup>4</sup> | ![#00aa00](https://placehold.it/15/00aa00/000000?text=+) Есть |
+| Многопоточное кодирование JPEG | ✔ | ✘ |
+| Аппаратное кодирование на Raspberry Pi | ✔ | ✘ |
+| Поведение при физическом отключении<br>устройства от сервера во время работы | ✔ Транслирует черный экран<br>с надписью ```NO SIGNAL```,<br>пока устройство не будет подключено снова | ✘ Прерывает трансляцию <sup>1</sup> |
+| Поддержка [DV-таймингов](https://linuxtv.org/downloads/v4l-dvb-apis-new/userspace-api/v4l/dv-timings.html) - возможности<br>изменения  параметров разрешения<br>трансляции на лету по сигналу<br>источника (устройства видеозахвата) | ✔ | ☹ Условно есть <sup>1</sup> |
+| Возможность пропуска фреймов при передаче<br>статического изображения по HTTP<br>для экономии трафика | ✔ <sup>2</sup> | ✘ |
+| Стрим через UNIX domain socket | ✔ | ✘ |
+| Systemd socket activation | ✔ | ✘ |
+| Дебаг-логи без перекомпиляции,<br>логгирование статистики производительности,<br>возможность получения параметров<br>трансляции по HTTP | ✔ | ✘ |
+| Возможность сервить файлы встроенным<br>HTTP-сервером  | ✔ | ☹ Нет каталогов |
+| Вывод сигналов о состоянии стрима на GPIO<br>с помощью [libgpiod](https://git.kernel.org/pub/scm/libs/libgpiod/libgpiod.git/about) | ✔ | ✘ |
+| Поддержка контролов веб-камер (фокус,<br> движение сервами) и всяких настроек,<br> типа яркости, через HTTP | ✘ | ✔ |
+| Совместимость с API mjpg-streamer'а | ✔ | :) |
 
 Сносочки:
   * ```1``` Еще до написания µStreamer, я запилил [патч](https://github.com/jacksonliam/mjpg-streamer/pull/164), добавляющий в mjpg-streamer поддержку DV-таймингов и предотвращающий его зависание при отключении устройства. Однако патч, увы, далек от совершенства и я не гарантирую его стопроцентную работоспособность, поскольку код mjpg-streamer чрезвычайно запутан и очень плохо структурирован. Учитывая это, а также то, что в дальнейшем мне потребовались многопоточность и аппаратное кодирование JPEG, было принято решение написать свой стрим-сервер с нуля, чтобы не тратить силы на поддержку лишнего легаси.
-  
+
   * ```2``` Это фича позволяет в несколько раз снизить объем исходящего трафика при трансляции HDMI, однако немного увеличивает загрузку процессора. Суть в том, что HDMI - полностью цифровой интерфейс, и новый захваченный фрейм может быть идентичен предыдущему в точности до байта. В этом случае нет нужды передавать одну и ту же картинку по сети несколько раз в секунду. При использовании опции `--drop-same-frames=20`, µStreamer будет дропать все одинаковые фреймы, но не более 20 подряд. Новый фрейм сравнивается с предыдущим сначала по длине, а затем помощью ```memcmp()```.
 
-  * ```3``` Поскольку µStreamer писался в первую очередь для устройств видеозахвата, в нем реализованы только те форматы, которые для них были нужны. MJPG в контексте входных данных означает, что устройство умеет самостоятельно сжимать картинку в JPEG и отдавать ее программе, что позволяет значительно снизить загрузку процессора и избавить его от необходимости кодировать картинку софтом. Этот формат поддерживается большинством веб-камер, но не поддерживается ни одним из встреченных мной устройств видеозахвата; его не умеет ни [Auvidea B101](https://auvidea.com/b101-hdmi-to-csi-2-bridge-15-pin-fpc/), ни [EasyCap UTV 007](https://www.amazon.com/dp/B0126O0RDC). Нет никаких технических сложностей добавить поддержку аппаратного MJPG источника, но у меня просто пока не дошли до этого руки.
-
-  * ```4``` ... и не будет. µStreamer придерживается концепции UNIX-way, так что если вам нужно нарисовать маленький сайтик со встроенной трансляцией - просто поставьте NGINX.
-
 -----
 # TL;DR
 Если вам нужно вещать стрим с уличной камеры и управлять ее параметрами - возьмите mjpg-streamer. Если же вам нужно очень качественное изображение с высоким FPS - µStreamer ваш бро.
 
 -----
 # Сборка
-Для сборки вам понадобятся ```make```, ```gcc```, ```libevent``` с поддержкой ```pthreads```, ```libjpeg8```/```libjpeg-turbo``` и ```libuuid```.
+Для сборки вам понадобятся ```make```, ```gcc```, ```libevent``` с поддержкой ```pthreads```, ```libjpeg8```/```libjpeg-turbo``` и ```libbsd``` (только для Linux).
 
-На Raspberry Pi програма автоматически собирается с поддержкой OpenMAX IL, если обнаружит нужные хедеры в ```/opt/vc/include```.
+* Arch: `sudo pacman -S libevent libjpeg-turbo libutil-linux libbsd`.
+* Raspbian: `sudo apt install libevent-dev libjpeg8-dev libbsd-dev`.  Добавьте `libgpiod` для `WITH_GPIO=1` и `libsystemd-dev` для `WITH_SYSTEMD=1`.
+* Debian/Ubuntu: `sudo apt install build-essential libevent-dev libjpeg-dev libbsd-dev`.
+
+Для включения сборки с поддержкой GPIO установите [libgpiod](https://git.kernel.org/pub/scm/libs/libgpiod/libgpiod.git/about) и добавьте параметр ```WITH_GPIO=1```. Если при сборке компилятор ругается на отсутствие функции ```pthread_get_name_np()``` или другой подобной, добавьте параметр ```WITH_PTHREAD_NP=0``` (по умолчанию он включен). При аналогичной ошибке с функцией ```setproctitle()``` добавьте параметр ```WITH_SETPROCTITLE=0```.
 
 ```
-$ git clone --depth=1 https://github.com/pi-kvm/ustreamer
+$ git clone --depth=1 https://github.com/pikvm/ustreamer
 $ cd ustreamer
 $ make
 $ ./ustreamer --help
 ```
 
-Для Arch Linux в AUR есть готовый пакет: https://aur.archlinux.org/packages/ustreamer
+Для Arch Linux в AUR есть готовый пакет: https://aur.archlinux.org/packages/ustreamer.
+
+Порт для FreeBSD: https://www.freshports.org/multimedia/ustreamer.
 
 -----
 # Использование
+**Для аппаратного кодирования M2M на Raspberry Pi, вам нужно ядро минимальной версии 5.15.32. Поддержка OpenMAX и MMAL для более старых ядер объявлена устаревшей и была удалена.**
+
 Будучи запущенным без аргументов, ```ustreamer``` попробует открыть устройство ```/dev/video0``` с разрешением 640x480 и начать трансляцию на ```http://127.0.0.1:8080```. Это поведение может быть изменено с помощью опций ```--device```, ```--host``` и ```--port```. Пример вещания на всю сеть по 80-м порту:
 ```
 # ./ustreamer --device=/dev/video1 --host=0.0.0.0 --port=80
 ```
 
+:exclamation: Обратите внимание, что начиная с версии µStreamer v2.0 кросс-доменные запросы были выключены по умолчанию [по соображениям безопасности](https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS). Чтобы включить старое поведение, используйте опцию `--allow-origin=\*`.
+
 Рекомендуемый способ запуска µStreamer для работы с [Auvidea B101](https://www.raspberrypi.org/forums/viewtopic.php?f=38&t=120702&start=400#p1339178) на Raspberry Pi:
 ```bash
 $ ./ustreamer \
     --format=uyvy \ # Настройка входного формата устройства
-    --encoder=omx \ # Использование аппаратного кодирования с помощью OpenMAX
+    --encoder=m2m-image \ # Аппаратное кодирование с помощью драйвера V4L2 M2M
+    --workers=3 \ # Максимум воркеров
+    --persistent \ # Не переинициализировать устройство при таймауте (например, когда был отключен HDMI-кабель)
     --dv-timings \ # Включение DV-таймингов
-    --quality=20 \ # У OpenMAX нелинейная шкала качества
     --drop-same-frames=30 # Экономим трафик
 ```
 
+:exclamation: Обратите внимание, что для использования `--drop-same-frames` для разных браузеров нужно использовать ряд специальных параметров в `/stream` (за деталями обратитесь к урлу `/`).
+
 За полным списком опций обращайтесь ко встроенной справке: ```ustreamer --help```.
 
+-----
+# Камера Raspberry Pi
+Пример использования камеры Raspberry Pi v1:
+```bash
+$ sudo modprobe bcm2835-v4l2
+$ ./ustreamer --host :: -m jpeg --device-timeout=5 --buffers=3 -r 2592x1944
+```
+
+:exclamation: Обратите внимание что боле новые модели камеры имеют другое максимальное разрешение. Список поддерживаемых разрешений можно найти в [документации PiCamera](https://picamera.readthedocs.io/en/release-1.13/fov.html#sensor-modes).
+
+:exclamation: Если камера выдает низкий фреймрейт, возможно что она работает в фото-режиме, где производит более низкий фпс, но более качественную кратинку. Это происходит потому что `bcm2835-v4l2` переключает камеру в фото-режим на разрешениях выше `1280x720`. Чтобы обойти это, передайте параметры `max_video_width` и `max_video_height` при загрузке модуля, например:
+
+```bash
+$ modprobe bcm2835-v4l2 max_video_width=2592 max_video_height=1944
+```
+
+-----
+# Интеграция
+
+## Nginx
+Если uStreamer находится на Nginx, то последний будет буферизировать поток и создавать дополнительную задержку в стриме. Чтобы задержки не было, буферизацию можно отключить:
+
+```nginx
+location /stream {
+    postpone_output 0;
+    proxy_buffering off;
+    proxy_ignore_headers X-Accel-Buffering;
+    proxy_pass http://ustreamer;
+}
+```
+
+-----
+# Утилиты V4L2
+V4L2 предоставляет ряд официальных утилит для управления USB-вебкамерами и получения информации об устройствах. С их помощью можно писать всякие настроечные скрипты и запускать их по крону, если, например, вам требуется изменять настройки экспозиции в зависимости от времени суток. Пакет с этими утилитами доступен на всех дистрибутивах Linux и обычно называется `v4l-utils`.
+
+* Вывести список видеоустройств: `v4l2-ctl --list-devices`.
+* Вывести список доступных контролов устройства: `v4l2-ctl -d /dev/video0 --list-ctrls`.
+* Вывести список доступных форматов видео: `v4l2-ctl -d /dev/video0 --list-formats-ext`.
+* Показать текущее значение контрола: `v4l2-ctl -d /dev/video0 --get-ctrl=exposure_auto`.
+* Изменить значение контрола: `v4l2-ctl -d /dev/video0 --set-ctrl=exposure_auto=1`.
+
+Больше примеров вы можете найти [здесь](https://www.kurokesu.com/main/2016/01/16/manual-usb-camera-settings-in-linux/), а документацию в [`man v4l2-ctl`](https://www.mankier.com/1/v4l2-ctl).
+
+-----
+# Смотрите также
+* [Запуск с помощью systemd-сервиса](https://github.com/pikvm/ustreamer/issues/16).
+
 -----
 # Лицензия
-Copyright (C) 2018 by Maxim Devaev mdevaev@gmail.com
+Copyright (C) 2018-2022 by Maxim Devaev mdevaev@gmail.com
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by

docs/h264.md

@@ -0,0 +1,231 @@
+# Streaming H.264 Video over WebRTC with Janus
+
+µStreamer supports bandwidth-efficient streaming using [H.264 compression](https://en.wikipedia.org/wiki/Advanced_Video_Coding) and the Janus WebRTC server.
+
+This guide explains how to configure µStreamer to provide an H.264 video stream and consume it within a web application using WebRTC.
+
+## Components
+
+In addition to µStreamer, H.264 streaming involves the following components:
+
+- [**Janus**](https://janus.conf.meetecho.com/): A general-purpose WebRTC server.
+- [**µStreamer Janus Plugin**](https://github.com/pikvm/ustreamer/tree/master/janus): A Janus plugin that allows Janus to consume a video stream from µStreamer via shared memory.
+- [**Janus JavaScript Client**](https://janus.conf.meetecho.com/docs/JS.html): A frontend library that communicates with the Janus server and the µStreamer Janus plugin.
+
+## Control Flow
+
+To connect to a µStreamer video stream over WebRTC, an application must establish the following control flow:
+
+1. The backend server starts the µStreamer service.
+1. The backend server starts the Janus WebRTC server with the µStreamer Janus plugin.
+1. The client-side JavaScript application establishes a connection to the Janus server.
+1. The client-side JavaScript application instructs the Janus server to attach the µStreamer Janus plugin and start the video stream.
+1. The client-side JavaScript application renders the video stream in the web browser.
+
+## Server Setup
+
+### Prerequisites
+
+To integrate with Janus, µStreamer has the following prerequisites:
+
+- The system packages that µStreamer depends on (see the [main build instructions](../README.md#building)).
+- The Janus WebRTC server with WebSockets transport enabled (see the [Janus documentation](https://github.com/meetecho/janus-gateway)).
+
+### Fixing Janus C Headers
+
+To compile µStreamer with the Janus option, (see [“Installation”](#installation)), you need to make the Janus header files available within µStreamer's build context.
+
+First, create a symbolic link from `/usr/include` to the Janus install directory. By default, Janus installs to `/opt/janus`.
+
+```sh
+ln -s /opt/janus/include/janus /usr/include/janus
+```
+
+Janus uses `#include` paths that make it difficult for third-party libraries to build against its headers. To fix this, modify the `#include` directive in `janus/plugins/plugin.h` to prepend a `../` to the included file name (`#include "refcount.h"` → `#include "../refcount.h"`).
+
+```sh
+sed \
+  --in-place \
+  --expression 's|^#include "refcount.h"$|#include "../refcount.h"|g' \
+  /usr/include/janus/plugins/plugin.h
+```
+
+### Installation
+
+First, compile µStreamer with the Janus plugin option (`WITH_JANUS`).
+
+```sh
+git clone --depth=1 https://github.com/pikvm/ustreamer
+cd ustreamer
+make WITH_JANUS=1
+```
+
+The `WITH_JANUS` option compiles the µStreamer Janus plugin and outputs it to `janus/libjanus_ustreamer.so`. Move this file to the plugin directory of your Janus installation.
+
+```sh
+mv \
+  janus/libjanus_ustreamer.so \
+  /opt/janus/lib/janus/plugins/libjanus_ustreamer.so
+```
+
+Finally, specify a qualifier for the shared memory object so that the µStreamer Janus plugin can read  µStreamer's video data.
+
+```sh
+cat > /opt/janus/lib/janus/configs/janus.plugin.ustreamer.jcfg <<EOF
+memsink: {
+  object = "demo::ustreamer::h264"
+}
+EOF
+```
+
+### Start µStreamer and the Janus WebRTC Server
+
+For µStreamer to share the video stream with the µStreamer Janus plugin, µStreamer must run with the following command-line flags:
+
+- `--h264-sink` with the qualifier of the shared memory object you specified above (`demo::ustreamer::h264`)
+- `--h264-sink-mode` with the permissions bitmask for the shared memory object (e.g., `660`)
+- `--h264-sink-rm` to clean up the shared memory object when the µStreamer process exits
+
+To load the µStreamer Janus plugin and configuration, the Janus WebRTC server must run with the following command-line flags:
+
+- `--configs-folder` with the path to the Janus configuration directory (e.g., `/opt/janus/lib/janus/configs/`)
+- `--plugins-folder` with the path to the Janus plugin directory (e.g., `/opt/janus/lib/janus/plugins/`)
+
+## Client Setup
+
+Once an application's backend server is running µStreamer and Janus, a browser-based JavaScript application can consume the server's video stream.
+
+### Prerequisites
+
+The client needs to load the following JavaScript libraries:
+
+- [WebRTC Adapter library](https://webrtc.github.io/adapter/adapter-8.1.0.js) (`webrtc-adapter.js`, version `8.1.0`)
+- [Janus Gateway JavaScript library](https://raw.githubusercontent.com/meetecho/janus-gateway/v1.0.0/html/janus.js) (`janus.js`, version `1.0.0`)
+
+### Control Flow
+
+The client-side JavaScript application uses the following control flow:
+
+1. The client loads and initializes the Janus client library.
+1. The client establishes a WebSockets connection to the Janus server.
+1. The client instructs the Janus server to attach the µStreamer Janus plugin.
+1. On success, the client obtains a plugin handle through which it can send requests directly to the µStreamer Janus plugin. The client processes responses via the `attach` callbacks:
+   - `onmessage` for general messages
+   - `onremotetrack` for the H.264 video stream
+1. The client issues a `watch` request to the µStreamer Janus plugin, which initiates the H.264 stream in the plugin itself.
+   - It takes a few seconds for uStreamer's video stream to become available to Janus. The first `watch` request may fail, so the client must retry the `watch` request.
+1. The client and server negotiate the underlying parameters of the WebRTC session. This procedure is called JavaScript Session Establishment Protocol (JSEP). The server makes a `jsepOffer` to the client, and the client responds with a `jsepAnswer`.
+1. The client issues a `start` request to the µStreamer Janus plugin to indicate that the client wants to begin consuming the video stream.
+1. The µStreamer Janus plugin delivers the H.264 video stream to the client via WebRTC.
+1. The Janus client library invokes the `onremotetrack` callback. The client attaches the video stream to the `<video>` element, rendering the video stream in the browser window.
+
+### Sample Code
+
+```html
+<!DOCTYPE html>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>µStreamer H.264 demo</title>
+  <script src="https://webrtc.github.io/adapter/adapter-8.1.0.js"></script>
+  <!-- janus.js is the JavaScript client library of Janus, as specified above in
+       the prerequisites section of the client setup. You might need to change
+       the `src` path, depending on where you serve this file from. -->
+  <script src="janus.js"></script>
+  <style>
+    video {
+      height: 100%;
+      width: 100%;
+      object-fit: contain;
+    }
+  </style>
+</head>
+<body>
+  <video id="webrtc-output" autoplay playsinline muted></video>
+  <script type="text/javascript">
+    // Initialize Janus library.
+    Janus.init({
+      // Turn on debug logs in the browser console.
+      debug: true,
+
+      // Configure Janus to use standard browser APIs internally.
+      dependencies: Janus.useDefaultDependencies(),
+    });
+
+    // Establish a WebSockets connection to the server.
+    const janus = new Janus({
+      // Specify the URL of the Janus server’s WebSockets endpoint.
+      server: `ws://${window.location.hostname}:8188/`,
+
+      // Callback function if the client connects successfully.
+      success: attachUStreamerPlugin,
+
+      // Callback function if the client fails to connect.
+      error: console.error,
+    });
+
+    let uStreamerPluginHandle = null;
+
+    function attachUStreamerPlugin() {
+      // Instruct the server to attach the µStreamer Janus plugin.
+      janus.attach({
+        // Qualifier of the plugin.
+        plugin: "janus.plugin.ustreamer",
+
+        // Callback function, for when the server attached the plugin
+        // successfully.
+        success: function (pluginHandle) {
+          uStreamerPluginHandle = pluginHandle;
+          // Instruct the µStreamer Janus plugin to initiate the video stream.
+          uStreamerPluginHandle.send({ message: { request: "watch" } });
+        },
+
+        // Callback function if the server fails to attach the plugin.
+        error: console.error,
+
+        // Callback function for processing messages from the Janus server.
+        onmessage: function (msg, jsepOffer) {
+          // 503 indicates that the plugin is not ready to stream yet. Retry the
+          // watch request until the video stream is available.
+          if (msg.error_code === 503) {
+            uStreamerPluginHandle.send({ message: { request: "watch" } });
+            return;
+          }
+
+          // If there is a JSEP offer, respond to it. This starts the WebRTC
+          // connection.
+          if (jsepOffer) {
+            uStreamerPluginHandle.createAnswer({
+              jsep: jsepOffer,
+              // Prevent the client from sending audio and video, as this would
+              // trigger a permission dialog in the browser.
+              media: { audioSend: false, videoSend: false },
+              success: function (jsepAnswer) {
+                uStreamerPluginHandle.send({
+                  message: { request: "start" },
+                  jsep: jsepAnswer,
+                });
+              },
+              error: console.error,
+            });
+          }
+        },
+
+        // Callback function, for when the video stream arrives.
+        onremotetrack: function (mediaStreamTrack, mediaId, isAdded) {
+          if (isAdded) {
+            // Attach the received media track to the video element. Cloning the
+            // mediaStreamTrack creates a new object with a distinct, globally
+            // unique stream identifier.
+            const videoElement = document.getElementById("webrtc-output");
+            const stream = new MediaStream();
+            stream.addTrack(mediaStreamTrack.clone());
+            videoElement.srcObject = stream;
+          }
+        },
+      });
+    }
+  </script>
+</body>
+</html>
+```

janus/Makefile

@@ -0,0 +1,54 @@
+DESTDIR ?=
+PREFIX ?= /usr/local
+
+CC ?= gcc
+CFLAGS ?= -O3
+LDFLAGS ?=
+
+
+# =====
+_PLUGIN = libjanus_ustreamer.so
+
+_CFLAGS = -fPIC -MD -c -std=c11 -Wall -Wextra -D_GNU_SOURCE $(shell pkg-config --cflags glib-2.0) $(CFLAGS)
+_LDFLAGS = -shared -lm -pthread -lrt -ljansson $(shell pkg-config --libs glib-2.0) $(LDFLAGS)
+
+_SRCS = $(shell ls src/*.c)
+
+_BUILD = build
+
+
+define optbool
+$(filter $(shell echo $(1) | tr A-Z a-z), yes on 1)
+endef
+
+
+WITH_PTHREAD_NP ?= 1
+ifneq ($(call optbool,$(WITH_PTHREAD_NP)),)
+override _CFLAGS += -DWITH_PTHREAD_NP
+endif
+
+
+# =====
+$(_PLUGIN): $(_SRCS:%.c=$(_BUILD)/%.o)
+	$(info == SO $@)
+	@ $(CC) $^ -o $@ $(_LDFLAGS)
+
+
+$(_BUILD)/%.o: %.c
+	$(info -- CC $<)
+	@ mkdir -p $(dir $@) || true
+	@ $(CC) $< -o $@ $(_CFLAGS)
+
+
+
+install: $(_PLUGIN)
+	mkdir -p $(DESTDIR)$(PREFIX)/lib/ustreamer/janus
+	install -m755 $(_PLUGIN) $(DESTDIR)$(PREFIX)/lib/ustreamer/janus/$(PLUGIN)
+
+
+clean:
+	rm -rf $(_PLUGIN) $(_BUILD)
+
+
+_OBJS = $(_SRCS:%.c=$(_BUILD)/%.o)
+-include $(_OBJS:%.o=%.d)

janus/src/base64.c

@@ -0,0 +1 @@
+../../src/libs/base64.c

janus/src/base64.h

@@ -0,0 +1 @@
+../../src/libs/base64.h

janus/src/config.h

@@ -0,0 +1 @@
+../../src/libs/config.h

janus/src/frame.c

@@ -0,0 +1 @@
+../../src/libs/frame.c

janus/src/frame.h

@@ -0,0 +1 @@
+../../src/libs/frame.h

janus/src/list.h

@@ -0,0 +1 @@
+../../src/libs/list.h

janus/src/memsinksh.h

@@ -0,0 +1 @@
+../../src/libs/memsinksh.h

janus/src/plugin.c

@@ -0,0 +1,522 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <stdatomic.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <assert.h>
+
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <linux/videodev2.h>
+
+#include <pthread.h>
+#include <jansson.h>
+#include <janus/config.h>
+#include <janus/plugins/plugin.h>
+
+#include "config.h"
+#include "tools.h"
+#include "threading.h"
+#include "list.h"
+#include "memsinksh.h"
+
+#include "rtp.h"
+
+
+static int _plugin_init(janus_callbacks *gw, const char *config_file_path);
+static void _plugin_destroy(void);
+
+static void _plugin_create_session(janus_plugin_session *session, int *error);
+static void _plugin_destroy_session(janus_plugin_session *session, int *error);
+static json_t *_plugin_query_session(janus_plugin_session *session);
+
+static void _plugin_setup_media(janus_plugin_session *session);
+static void _plugin_hangup_media(janus_plugin_session *session);
+
+static struct janus_plugin_result *_plugin_handle_message(
+	janus_plugin_session *session, char *transaction, json_t *msg, json_t *jsep);
+
+static int _plugin_get_api_compatibility(void);
+static int _plugin_get_version(void);
+static const char *_plugin_get_version_string(void);
+static const char *_plugin_get_description(void);
+static const char *_plugin_get_name(void);
+static const char *_plugin_get_author(void);
+static const char *_plugin_get_package(void);
+
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Woverride-init"
+static janus_plugin _plugin = JANUS_PLUGIN_INIT(
+	.init = _plugin_init,
+	.destroy = _plugin_destroy,
+
+	.create_session = _plugin_create_session,
+	.destroy_session = _plugin_destroy_session,
+	.query_session = _plugin_query_session,
+
+	.setup_media = _plugin_setup_media,
+	.hangup_media = _plugin_hangup_media,
+
+	.handle_message = _plugin_handle_message,
+
+	.get_api_compatibility = _plugin_get_api_compatibility,
+	.get_version = _plugin_get_version,
+	.get_version_string = _plugin_get_version_string,
+	.get_description = _plugin_get_description,
+	.get_name = _plugin_get_name,
+	.get_author = _plugin_get_author,
+	.get_package = _plugin_get_package,
+);
+#pragma GCC diagnostic pop
+
+janus_plugin *create(void) { // cppcheck-suppress unusedFunction
+	return &_plugin;
+}
+
+
+typedef struct _client_sx {
+	janus_plugin_session *session;
+	bool transmit;
+
+	LIST_STRUCT(struct _client_sx);
+} _client_s;
+
+
+static char				*_g_memsink_obj = NULL;
+const long double		_g_wait_timeout = 1;
+const long double		_g_lock_timeout = 1;
+const useconds_t		_g_lock_polling = 1000;
+const useconds_t		_g_watchers_polling = 100000;
+
+static _client_s		*_g_clients = NULL;
+static janus_callbacks	*_g_gw = NULL;
+static rtp_s			*_g_rtp = NULL;
+
+static pthread_t		_g_tid;
+static pthread_mutex_t	_g_lock = PTHREAD_MUTEX_INITIALIZER;
+static atomic_bool		_g_ready = ATOMIC_VAR_INIT(false);
+static atomic_bool		_g_stop = ATOMIC_VAR_INIT(false);
+static atomic_bool		_g_has_watchers = ATOMIC_VAR_INIT(false);
+
+
+#define JLOG_INFO(_msg, ...)	JANUS_LOG(LOG_INFO, "== %s -- " _msg "\n", _plugin_get_name(), ##__VA_ARGS__)
+#define JLOG_WARN(_msg, ...)	JANUS_LOG(LOG_WARN, "== %s -- " _msg "\n", _plugin_get_name(), ##__VA_ARGS__)
+#define JLOG_ERROR(_msg, ...)	JANUS_LOG(LOG_ERR, "== %s -- " _msg "\n", _plugin_get_name(), ##__VA_ARGS__)
+
+#define JLOG_PERROR(_msg, ...) { \
+		char _perror_buf[1024] = {0}; \
+		char *_perror_ptr = errno_to_string(errno, _perror_buf, 1023); \
+		JANUS_LOG(LOG_ERR, "[%s] " _msg ": %s\n", _plugin_get_name(), ##__VA_ARGS__, _perror_ptr); \
+	}
+
+#define LOCK			A_MUTEX_LOCK(&_g_lock)
+#define UNLOCK			A_MUTEX_UNLOCK(&_g_lock)
+#define READY			atomic_load(&_g_ready)
+#define STOP			atomic_load(&_g_stop)
+#define HAS_WATCHERS	atomic_load(&_g_has_watchers)
+
+
+static void _relay_rtp_clients(const uint8_t *datagram, size_t size) {
+	janus_plugin_rtp packet = {
+		.video = true,
+		.buffer = (char *)datagram,
+		.length = size,
+	};
+	janus_plugin_rtp_extensions_reset(&packet.extensions);
+	LIST_ITERATE(_g_clients, client, {
+		if (client->transmit) {
+			_g_gw->relay_rtp(client->session, &packet);
+		}
+	});
+}
+
+static int _wait_frame(int fd, memsink_shared_s* mem, uint64_t last_id) {
+	long double deadline_ts = get_now_monotonic() + _g_wait_timeout;
+	long double now;
+	do {
+		int retval = flock_timedwait_monotonic(fd, _g_lock_timeout);
+		now = get_now_monotonic();
+		if (retval < 0 && errno != EWOULDBLOCK) {
+			JLOG_PERROR("Can't lock memsink");
+			return -1;
+		} else if (retval == 0) {
+			if (mem->magic == MEMSINK_MAGIC && mem->version == MEMSINK_VERSION && mem->id != last_id) {
+				return 0;
+			}
+			if (flock(fd, LOCK_UN) < 0) {
+				JLOG_PERROR("Can't unlock memsink");
+				return -1;
+			}
+		}
+		usleep(_g_lock_polling);
+	} while (now < deadline_ts);
+	return -2;
+}
+
+static int _get_frame(int fd, memsink_shared_s *mem, frame_s *frame, uint64_t *frame_id) {
+	frame_set_data(frame, mem->data, mem->used);
+	FRAME_COPY_META(mem, frame);
+	*frame_id = mem->id;
+	mem->last_client_ts = get_now_monotonic();
+	int retval = 0;
+	if (frame->format != V4L2_PIX_FMT_H264) {
+		JLOG_ERROR("Got non-H264 frame from memsink");
+		retval = -1;
+	}
+	if (flock(fd, LOCK_UN) < 0) {
+		JLOG_PERROR("Can't unlock memsink");
+		retval = -1;
+	}
+	return retval;
+}
+
+static void *_clients_thread(UNUSED void *arg) {
+	A_THREAD_RENAME("us_clients");
+	atomic_store(&_g_ready, true);
+
+	frame_s *frame = frame_init();
+	uint64_t frame_id = 0;
+
+	unsigned error_reported = 0;
+
+#	define IF_NOT_REPORTED(_error, ...) { \
+			if (error_reported != _error) { __VA_ARGS__; error_reported = _error; } \
+		}
+
+	while (!STOP) {
+		if (!HAS_WATCHERS) {
+			IF_NOT_REPORTED(1, {
+				JLOG_INFO("No active watchers, memsink disconnected");
+			});
+			usleep(_g_watchers_polling);
+			continue;
+		}
+
+		int fd = -1;
+		memsink_shared_s *mem = NULL;
+
+		if ((fd = shm_open(_g_memsink_obj, O_RDWR, 0)) <= 0) {
+			IF_NOT_REPORTED(2, {
+				JLOG_PERROR("Can't open memsink");
+			});
+			goto close_memsink;
+		}
+
+		if ((mem = memsink_shared_map(fd)) == NULL) {
+			IF_NOT_REPORTED(3, {
+				JLOG_PERROR("Can't map memsink");
+			});
+			goto close_memsink;
+		}
+
+		error_reported = 0;
+
+		JLOG_INFO("Memsink opened; reading frames ...");
+		while (!STOP && HAS_WATCHERS) {
+			int result = _wait_frame(fd, mem, frame_id);
+			if (result == 0) {
+				if (_get_frame(fd, mem, frame, &frame_id) != 0) {
+					goto close_memsink;
+				}
+				LOCK;
+				rtp_wrap_h264(_g_rtp, frame, _relay_rtp_clients);
+				UNLOCK;
+			} else if (result == -1) {
+				goto close_memsink;
+			}
+		}
+
+		close_memsink:
+			if (mem != NULL) {
+				JLOG_INFO("Memsink closed");
+				memsink_shared_unmap(mem);
+				mem = NULL;
+			}
+			if (fd > 0) {
+				close(fd);
+				fd = -1;
+			}
+			sleep(1); // error_delay
+	}
+
+#	undef IF_NOT_REPORTED
+
+	frame_destroy(frame);
+	return NULL;
+}
+
+static int _read_config(const char *config_dir_path) {
+	char *config_file_path;
+	janus_config *config = NULL;
+
+	A_ASPRINTF(config_file_path, "%s/%s.jcfg", config_dir_path, _plugin_get_package());
+	JLOG_INFO("Reading config file '%s' ...", config_file_path);
+
+	config = janus_config_parse(config_file_path);
+	if (config == NULL) {
+		JLOG_ERROR("Can't read config");
+		goto error;
+	}
+	janus_config_print(config);
+
+	janus_config_category *config_memsink = janus_config_get_create(config, NULL, janus_config_type_category, "memsink");
+	janus_config_item *config_memsink_obj = janus_config_get(config, config_memsink, janus_config_type_item, "object");
+	if (config_memsink_obj == NULL || config_memsink_obj->value == NULL || config_memsink_obj->value[0] == '\0') {
+		JLOG_ERROR("Missing config value: memsink.object");
+		goto error;
+	}
+	_g_memsink_obj = strdup(config_memsink_obj->value);
+
+	int retval = 0;
+	goto ok;
+	error:
+		retval = -1;
+	ok:
+		if (config) {
+			janus_config_destroy(config);
+		}
+		free(config_file_path);
+		return retval;
+}
+
+static int _plugin_init(janus_callbacks *gw, const char *config_dir_path) {
+	// https://groups.google.com/g/meetecho-janus/c/xoWIQfaoJm8
+	// sysctl -w net.core.rmem_default=500000 
+	// sysctl -w net.core.wmem_default=500000 
+	// sysctl -w net.core.rmem_max=1000000 
+	// sysctl -w net.core.wmem_max=1000000
+
+	JLOG_INFO("Initializing plugin ...");
+	assert(!READY);
+	assert(!STOP);
+	if (gw == NULL || config_dir_path == NULL || _read_config(config_dir_path) < 0) {
+		return -1;
+	}
+	_g_gw = gw;
+	_g_rtp = rtp_init();
+	A_THREAD_CREATE(&_g_tid, _clients_thread, NULL);
+	return 0;
+}
+
+static void _plugin_destroy(void) {
+	JLOG_INFO("Destroying plugin ...");
+	atomic_store(&_g_stop, true);
+	if (READY) {
+		A_THREAD_JOIN(_g_tid);
+	}
+
+	LIST_ITERATE(_g_clients, client, {
+		LIST_REMOVE(_g_clients, client);
+		free(client);
+	});
+	_g_clients = NULL;
+
+	rtp_destroy(_g_rtp);
+	_g_rtp = NULL;
+
+	_g_gw = NULL;
+
+	if (_g_memsink_obj) {
+		free(_g_memsink_obj);
+		_g_memsink_obj = NULL;
+	}
+}
+
+#define IF_DISABLED(...) { if (!READY || STOP) { __VA_ARGS__ } }
+
+static void _plugin_create_session(janus_plugin_session *session, int *error) {
+	IF_DISABLED({ *error = -1; return; });
+	LOCK;
+	JLOG_INFO("Creating session %p ...", session);
+	_client_s *client;
+	A_CALLOC(client, 1);
+	client->session = session;
+	client->transmit = true;
+	LIST_APPEND(_g_clients, client);
+	atomic_store(&_g_has_watchers, true);
+	UNLOCK;
+}
+
+static void _plugin_destroy_session(janus_plugin_session* session, int *error) {
+	IF_DISABLED({ *error = -1; return; });
+	LOCK;
+	bool found = false;
+	bool has_watchers = false;
+	LIST_ITERATE(_g_clients, client, {
+		if (client->session == session) {
+			JLOG_INFO("Removing session %p ...", session);
+			LIST_REMOVE(_g_clients, client);
+			free(client);
+			found = true;
+		} else {
+			has_watchers = (has_watchers || client->transmit);
+		}
+	});
+	if (!found) {
+		JLOG_WARN("No session %p", session);
+		*error = -2;
+	}
+	atomic_store(&_g_has_watchers, has_watchers);
+	UNLOCK;
+}
+
+static json_t *_plugin_query_session(janus_plugin_session *session) {
+	IF_DISABLED({ return NULL; });
+	json_t *info = NULL;
+	LOCK;
+	LIST_ITERATE(_g_clients, client, {
+		if (client->session == session) {
+			info = json_string("session_found");
+			break;
+		}
+	});
+	UNLOCK;
+	return info;
+}
+
+static void _set_transmit(janus_plugin_session *session, UNUSED const char *msg, bool transmit) {
+	IF_DISABLED({ return; });
+	LOCK;
+	bool found = false;
+	bool has_watchers = false;
+	LIST_ITERATE(_g_clients, client, {
+		if (client->session == session) {
+			client->transmit = transmit;
+			//JLOG_INFO("%s session %p", msg, session);
+			found = true;
+		}
+		has_watchers = (has_watchers || client->transmit);
+	});
+	if (!found) {
+		JLOG_WARN("No session %p", session);
+	}
+	atomic_store(&_g_has_watchers, has_watchers);
+	UNLOCK;
+}
+
+#undef IF_DISABLED
+
+static void _plugin_setup_media(janus_plugin_session *session) { _set_transmit(session, "Unmuted", true); }
+static void _plugin_hangup_media(janus_plugin_session *session) { _set_transmit(session, "Muted", false); }
+
+static struct janus_plugin_result *_plugin_handle_message(
+	janus_plugin_session *session, char *transaction, json_t *msg, json_t *jsep) {
+
+	assert(transaction != NULL);
+
+#	define FREE_MSG_JSEP { \
+			if (msg) json_decref(msg); \
+			if (jsep) json_decref(jsep); \
+		}
+
+	if (session == NULL || msg == NULL) {
+		free(transaction);
+		FREE_MSG_JSEP;
+		return janus_plugin_result_new(JANUS_PLUGIN_ERROR, (msg ? "No session" : "No message"), NULL);
+	}
+
+#	define PUSH_ERROR(_error, _reason) { \
+			/*JLOG_ERROR("Message error in session %p: %s", session, _reason);*/ \
+			json_t *_event = json_object(); \
+			json_object_set_new(_event, "ustreamer", json_string("event")); \
+			json_object_set_new(_event, "error_code", json_integer(_error)); \
+			json_object_set_new(_event, "error", json_string(_reason)); \
+			_g_gw->push_event(session, &_plugin, transaction, _event, NULL); \
+			json_decref(_event); \
+		}
+
+	json_t *request_obj = json_object_get(msg, "request");
+	if (request_obj == NULL) {
+		PUSH_ERROR(400, "Request missing");
+		goto ok_wait;
+	}
+
+	const char *request_str = json_string_value(request_obj);
+	if (!request_str) {
+		PUSH_ERROR(400, "Request not a string");
+		goto ok_wait;
+	}
+	//JLOG_INFO("Message: %s", request_str);
+
+#	define PUSH_STATUS(_status, _jsep) { \
+			json_t *_event = json_object(); \
+			json_object_set_new(_event, "ustreamer", json_string("event")); \
+			json_t *_result = json_object(); \
+			json_object_set_new(_result, "status", json_string(_status)); \
+			json_object_set_new(_event, "result", _result); \
+			_g_gw->push_event(session, &_plugin, transaction, _event, _jsep); \
+			json_decref(_event); \
+		}
+
+	if (!strcmp(request_str, "start")) {
+		PUSH_STATUS("started", NULL);
+
+	} else if (!strcmp(request_str, "stop")) {
+		PUSH_STATUS("stopped", NULL);
+
+	} else if (!strcmp(request_str, "watch")) {
+		char *sdp = rtp_make_sdp(_g_rtp);
+		if (sdp == NULL) {
+			PUSH_ERROR(503, "Haven't received SPS/PPS from memsink yet");
+			goto ok_wait;
+		}
+		//JLOG_INFO("SDP generated:\n%s", sdp);
+		json_t *offer_jsep = json_pack("{ssss}", "type", "offer", "sdp", sdp);
+		free(sdp);
+		PUSH_STATUS("started", offer_jsep);
+		json_decref(offer_jsep);
+
+	} else {
+		PUSH_ERROR(405, "Not implemented");
+	}
+
+	ok_wait:
+		FREE_MSG_JSEP;
+		return janus_plugin_result_new(JANUS_PLUGIN_OK_WAIT, NULL, NULL);
+
+#	undef PUSH_ERROR
+#	undef FREE_MSG_JSEP
+}
+
+static int _plugin_get_api_compatibility(void)		{ return JANUS_PLUGIN_API_VERSION; }
+static int _plugin_get_version(void)				{ return VERSION_U; }
+static const char *_plugin_get_version_string(void)	{ return VERSION; }
+static const char *_plugin_get_description(void)	{ return "Pi-KVM uStreamer Janus plugin for H.264 video"; }
+static const char *_plugin_get_name(void)			{ return "ustreamer"; }
+static const char *_plugin_get_author(void)			{ return "Maxim Devaev <mdevaev@gmail.com>"; }
+static const char *_plugin_get_package(void)		{ return "janus.plugin.ustreamer"; }
+
+
+#undef STOP
+#undef READY
+#undef UNLOCK
+#undef LOCK
+
+#undef JLOG_PERROR
+#undef JLOG_ERROR
+#undef JLOG_WARN
+#undef JLOG_INFO

janus/src/rtp.c

@@ -0,0 +1,228 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    This source file is partially based on this code:                       #
+#      - https://github.com/catid/kvm/blob/master/kvm_pipeline/src           #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#include "rtp.h"
+
+
+#define PAYLOAD 96 // Payload type
+#define PRE 3 // Annex B prefix length
+
+
+void _rtp_process_nalu(rtp_s *rtp, const uint8_t *data, size_t size, uint32_t pts, bool marked, rtp_callback_f callback);
+static void _rtp_write_header(rtp_s *rtp, uint32_t pts, bool marked);
+
+static ssize_t _find_annexb(const uint8_t *data, size_t size);
+
+
+rtp_s *rtp_init(void) {
+	rtp_s *rtp;
+	A_CALLOC(rtp, 1);
+	rtp->ssrc = triple_u32(get_now_monotonic_u64());
+	rtp->sps = frame_init();
+	rtp->pps = frame_init();
+	A_MUTEX_INIT(&rtp->mutex);
+	return rtp;
+}
+
+void rtp_destroy(rtp_s *rtp) {
+	A_MUTEX_DESTROY(&rtp->mutex);
+	frame_destroy(rtp->pps);
+	frame_destroy(rtp->sps);
+	free(rtp);
+}
+
+char *rtp_make_sdp(rtp_s *rtp) {
+	A_MUTEX_LOCK(&rtp->mutex);
+
+	if (rtp->sps->used == 0 || rtp->pps->used == 0) {
+		A_MUTEX_UNLOCK(&rtp->mutex);
+		return NULL;
+	}
+
+	char *sps = NULL;
+	char *pps = NULL;
+	base64_encode(rtp->sps->data, rtp->sps->used, &sps, NULL);
+	base64_encode(rtp->pps->data, rtp->pps->used, &pps, NULL);
+
+	A_MUTEX_UNLOCK(&rtp->mutex);
+
+	// https://tools.ietf.org/html/rfc6184
+	// https://github.com/meetecho/janus-gateway/issues/2443
+	char *sdp;
+	A_ASPRINTF(sdp,
+		"v=0" RN
+		"o=- %" PRIu64 " 1 IN IP4 127.0.0.1" RN
+		"s=Pi-KVM uStreamer" RN
+		"t=0 0" RN
+		"m=video 1 RTP/SAVPF %d" RN
+		"c=IN IP4 0.0.0.0" RN
+		"a=rtpmap:%d H264/90000" RN
+		"a=fmtp:%d profile-level-id=42E01F" RN
+		"a=fmtp:%d packetization-mode=1" RN
+		"a=fmtp:%d sprop-sps=%s" RN
+		"a=fmtp:%d sprop-pps=%s" RN
+		"a=rtcp-fb:%d nack" RN
+		"a=rtcp-fb:%d nack pli" RN
+		"a=rtcp-fb:%d goog-remb" RN
+		"a=sendonly" RN,
+		get_now_id() >> 1, PAYLOAD, PAYLOAD, PAYLOAD, PAYLOAD,
+		PAYLOAD, sps,
+		PAYLOAD, pps,
+		PAYLOAD, PAYLOAD, PAYLOAD
+	);
+
+	free(sps);
+	free(pps);
+	return sdp;
+}
+
+void rtp_wrap_h264(rtp_s *rtp, const frame_s *frame, rtp_callback_f callback) {
+	// There is a complicated logic here but everything works as it should:
+	//   - https://github.com/pikvm/ustreamer/issues/115#issuecomment-893071775
+
+	assert(frame->format == V4L2_PIX_FMT_H264);
+
+	const uint32_t pts = get_now_monotonic_u64() * 9 / 100; // PTS units are in 90 kHz
+	ssize_t last_offset = -PRE;
+
+	while (true) { // Find and iterate by nalus
+		const size_t next_start = last_offset + PRE;
+		ssize_t offset = _find_annexb(frame->data + next_start, frame->used - next_start);
+		if (offset < 0) {
+			break;
+		}
+		offset += next_start;
+
+		if (last_offset >= 0) {
+			const uint8_t *data = frame->data + last_offset + PRE;
+			size_t size = offset - last_offset - PRE;
+			if (data[size - 1] == 0) { // Check for extra 00
+				--size;
+			}
+			_rtp_process_nalu(rtp, data, size, pts, false, callback);
+		}
+
+		last_offset = offset;
+	}
+
+	if (last_offset >= 0) {
+		const uint8_t *data = frame->data + last_offset + PRE;
+		size_t size = frame->used - last_offset - PRE;
+		_rtp_process_nalu(rtp, data, size, pts, true, callback);
+	}
+}
+
+void _rtp_process_nalu(rtp_s *rtp, const uint8_t *data, size_t size, uint32_t pts, bool marked, rtp_callback_f callback) {
+	const unsigned ref_idc = (data[0] >> 5) & 3;
+	const unsigned type = data[0] & 0x1F;
+
+	frame_s *ps = NULL;
+	switch (type) {
+		case 7: ps = rtp->sps; break;
+		case 8: ps = rtp->pps; break;
+	}
+	if (ps) {
+		A_MUTEX_LOCK(&rtp->mutex);
+		frame_set_data(ps, data, size);
+		A_MUTEX_UNLOCK(&rtp->mutex);
+	}
+
+#	define HEADER_SIZE 12
+
+	if (size + HEADER_SIZE <= RTP_DATAGRAM_SIZE) {
+		_rtp_write_header(rtp, pts, marked);
+		memcpy(rtp->datagram + HEADER_SIZE, data, size);
+		callback(rtp->datagram, size + HEADER_SIZE);
+		return;
+	}
+
+	const size_t fu_overhead = HEADER_SIZE + 2; // FU-A overhead
+
+	const uint8_t *src = data + 1;
+	ssize_t remaining = size - 1;
+
+	bool first = true;
+	while (remaining > 0) {
+		ssize_t frag_size = RTP_DATAGRAM_SIZE - fu_overhead;
+		const bool last = (remaining <= frag_size);
+		if (last) {
+			frag_size = remaining;
+		}
+
+		_rtp_write_header(rtp, pts, (marked && last));
+
+		rtp->datagram[HEADER_SIZE] = 28 | (ref_idc << 5);
+
+		uint8_t fu = type;
+		if (first) {
+			fu |= 0x80;
+		}
+		if (last) {
+			fu |= 0x40;
+		}
+		rtp->datagram[HEADER_SIZE + 1] = fu;
+
+		memcpy(rtp->datagram + fu_overhead,	src, frag_size);
+
+		callback(rtp->datagram, fu_overhead + frag_size);
+
+		src += frag_size;
+		remaining -= frag_size;
+		first = false;
+	}
+
+#	undef HEADER_SIZE
+}
+
+static void _rtp_write_header(rtp_s *rtp, uint32_t pts, bool marked) {
+	uint32_t word0 = 0x80000000;
+	if (marked) {
+		word0 |= 1 << 23;
+	}
+	word0 |= (PAYLOAD & 0x7F) << 16;
+	word0 |= rtp->seq;
+	++rtp->seq;
+
+#	define WRITE_BE_U32(_offset, _value) *((uint32_t *)(rtp->datagram + _offset)) = __builtin_bswap32(_value)
+	WRITE_BE_U32(0, word0);
+	WRITE_BE_U32(4, pts);
+	WRITE_BE_U32(8, rtp->ssrc);
+#	undef WRITE_BE_U32
+}
+
+static ssize_t _find_annexb(const uint8_t *data, size_t size) {
+	// Parses buffer for 00 00 01 start codes
+	if (size >= PRE) {
+		for (size_t index = 0; index <= size - PRE; ++index) {
+			if (data[index] == 0 && data[index + 1] == 0 && data[index + 2] == 1) {
+				return index;
+			}
+		}
+	}
+	return -1;
+}
+
+#undef PRE
+#undef PAYLOAD

janus/src/rtp.h

@@ -0,0 +1,69 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    This source file is partially based on this code:                       #
+#      - https://github.com/catid/kvm/blob/master/kvm_pipeline/src           #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#pragma once
+
+#include <stdlib.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <string.h>
+#include <assert.h>
+
+#include <sys/types.h>
+#include <linux/videodev2.h>
+
+#include <pthread.h>
+
+#include "tools.h"
+#include "threading.h"
+#include "frame.h"
+#include "base64.h"
+
+
+// https://stackoverflow.com/questions/47635545/why-webrtc-chose-rtp-max-packet-size-to-1200-bytes
+#define RTP_DATAGRAM_SIZE 1200
+
+
+typedef struct {
+	uint32_t ssrc;
+	uint16_t seq;
+
+	uint8_t datagram[RTP_DATAGRAM_SIZE];
+
+	frame_s *sps; // Actually not a frame, just a bytes storage
+	frame_s *pps;
+
+	pthread_mutex_t mutex;
+} rtp_s;
+
+typedef void (*rtp_callback_f)(const uint8_t *datagram, size_t size);
+
+
+rtp_s *rtp_init(void);
+void rtp_destroy(rtp_s *rtp);
+
+char *rtp_make_sdp(rtp_s *rtp);
+void rtp_wrap_h264(rtp_s *rtp, const frame_s *frame, rtp_callback_f callback);

janus/src/threading.h

@@ -0,0 +1 @@
+../../src/libs/threading.h

janus/src/tools.h

@@ -0,0 +1 @@
+../../src/libs/tools.h

linters/.dockerignore

@@ -0,0 +1,2 @@
+/.tox/
+/.mypy_cache/

linters/Dockerfile

@@ -0,0 +1,26 @@
+FROM archlinux/archlinux:base-devel
+
+RUN mkdir -p /etc/pacman.d/hooks \
+	&& ln -s /dev/null /etc/pacman.d/hooks/30-systemd-tmpfiles.hook
+
+RUN echo "Server = http://mirror.yandex.ru/archlinux/\$repo/os/\$arch" > /etc/pacman.d/mirrorlist
+
+RUN pacman -Syu --noconfirm \
+	&& pacman -S --needed --noconfirm \
+		vim \
+		git \
+		libjpeg \
+		libevent \
+		libutil-linux \
+		libbsd \
+		python \
+		python-pip \
+		python-tox \
+		cppcheck \
+		npm \
+	&& (pacman -Sc --noconfirm || true) \
+	&& rm -rf /var/cache/pacman/pkg/*
+
+RUN npm install htmlhint -g
+
+CMD /bin/bash

linters/cppcheck.h

@@ -0,0 +1,3 @@
+#define CHAR_BIT 8
+#define WITH_GPIO
+#define JANUS_PLUGIN_INIT(...) { __VA_ARGS__ }

linters/flake8.ini

@@ -0,0 +1,9 @@
+[flake8]
+inline-quotes = double
+max-line-length = 160
+ignore = W503, E227, E241, E252, Q003
+# W503 line break before binary operator
+# E227 missing whitespace around bitwise or shift operator
+# E241 multiple spaces after
+# E252 missing whitespace around parameter equals
+# Q003 Change outer quotes to avoid escaping inner quotes

linters/mypy.ini

@@ -0,0 +1,5 @@
+[mypy]
+python_version = 3.9
+ignore_missing_imports = true
+disallow_untyped_defs = true
+strict_optional = true

linters/pylint.ini

@@ -0,0 +1,64 @@
+[MASTER]
+ignore = .git
+
+[DESIGN]
+min-public-methods = 0
+max-args = 10
+
+[TYPECHECK]
+ignored-classes=
+	AioQueue,
+
+[MESSAGES CONTROL]
+disable =
+	file-ignored,
+	locally-disabled,
+	fixme,
+	missing-docstring,
+	no-init,
+	no-self-use,
+	superfluous-parens,
+	abstract-class-not-used,
+	abstract-class-little-used,
+	duplicate-code,
+	bad-continuation,
+	bad-whitespace,
+	star-args,
+	broad-except,
+	redundant-keyword-arg,
+	wrong-import-order,
+	too-many-ancestors,
+	no-else-return,
+	len-as-condition,
+	unspecified-encoding,
+
+[REPORTS]
+msg-template = {symbol} -- {path}:{line}({obj}): {msg}
+
+[FORMAT]
+max-line-length = 160
+
+[BASIC]
+# List of builtins function names that should not be used, separated by a comma
+bad-functions =
+
+# Good variable names which should always be accepted, separated by a comma
+good-names = _, __, x, y, ws, make-html-h, make-jpeg-h
+
+# Regular expression matching correct method names
+method-rgx = [a-z_][a-z0-9_]{2,50}$
+
+# Regular expression matching correct function names
+function-rgx = [a-z_][a-z0-9_]{2,50}$
+
+# Regular expression which should only match correct module level names
+const-rgx = ([a-zA-Z_][a-zA-Z0-9_]*)$
+
+# Regular expression which should only match correct argument names
+argument-rgx = [a-z_][a-z0-9_]{1,30}$
+
+# Regular expression which should only match correct variable names
+variable-rgx = [a-z_][a-z0-9_]{1,30}$
+
+# Regular expression which should only match correct instance attribute names
+attr-rgx = [a-z_][a-z0-9_]{1,30}$

linters/tox.ini

@@ -0,0 +1,51 @@
+[tox]
+envlist = cppcheck, flake8, pylint, mypy, vulture, htmlhint
+skipsdist = true
+
+[testenv]
+basepython = python3.10
+changedir = /src
+
+[testenv:cppcheck]
+whitelist_externals = cppcheck
+commands = cppcheck \
+			--force \
+			--std=c11 \
+			--error-exitcode=1 \
+			--quiet \
+			--enable=warning,unusedFunction,portability,performance,style \
+			--suppress=assignmentInAssert \
+			--suppress=variableScope \
+			--inline-suppr \
+			--library=python \
+			--include=linters/cppcheck.h \
+		src python/ustreamer.c janus/rtp.h janus/rtp.c janus/plugin.c
+
+[testenv:flake8]
+whitelist_externals = bash
+commands = bash -c 'flake8 --config=linters/flake8.ini tools/*.py' python/*.py
+deps =
+	flake8
+	flake8-quotes
+
+[testenv:pylint]
+whitelist_externals = bash
+commands = bash -c 'pylint --rcfile=linters/pylint.ini --output-format=colorized --reports=no tools/*.py python/*.py'
+deps =
+	pylint
+
+[testenv:mypy]
+whitelist_externals = bash
+commands = bash -c 'mypy --config-file=linters/mypy.ini tools/*.py python/*.py'
+deps =
+	mypy
+
+[testenv:vulture]
+whitelist_externals = bash
+commands = bash -c 'vulture tools/*.py python/*.py'
+deps =
+	vulture
+
+[testenv:htmlhint]
+whitelist_externals = htmlhint
+commands = htmlhint src/ustreamer/http/data/*.html

man/ustreamer-dump.1

@@ -0,0 +1,91 @@
+.\" Manpage for ustreamer-dump.
+.\" Open an issue or pull request to https://github.com/pikvm/ustreamer to correct errors or typos
+.TH USTREAMER-DUMP 1 "version 5.4" "January 2021"
+
+.SH NAME
+ustreamer-dump \- Dump uStreamer's memory sink to file
+
+.SH SYNOPSIS
+.B ustreamer-dump
+.RI [OPTIONS]
+
+.SH DESCRIPTION
+µStreamer-dump (\fBustreamer-dump\fP) writes a local stream from ustreamer to a file or redirect it to other utilities (such as \fBffmpeg\fR).
+
+.SH USAGE
+\fBustreamer\fR requires at least the \fB\-\-sink\fR option to operate.
+
+To output ustreamers sink "test" to ffmpeg, and into a file called test.mp4:
+
+\fBustreamer-dump \e\fR
+.RS
+\fB\-\-sink=test \e\fR # Use ustreamer sink "test"
+.nf
+\fB\-\-output\ \- \e\fR # Output to stdout
+\fB|\ ffmpeg\ \-use_wallclock_as_timestamps\ 1\ \-i\ pipe:\ \-c:v\ libx264\ test\.mp4\fR
+
+.SH OPTIONS
+.SS "Sink options"
+.TP
+.BR \-s ", " \-\-sink\ \fIname
+Memory sink ID. No default.
+.TP
+.BR \-t ", " \-\-sink\-timeout\ \fIsec
+Timeout for the upcoming frame. Default: 1.
+.TP
+.BR \-o ", " \-\-output\ \fIfilename
+Filename to dump output to. Use '-' for stdout. Default: just consume the sink.
+.TP
+.BR \-j ", " \-\-output-json
+Format output as JSON. Required option --output. Default: disabled.
+.TP
+.BR \-c ", " \-\-count\ \fIN
+Limit the number of frames. Default: 0 (infinite).
+.TP
+.BR \-i ", "\-\-interval\ \fIsec
+Delay between reading frames (float). Default: 0.
+
+.SS "Logging options"
+.TP
+.BR \-\-log\-level\ \fIN
+Verbosity level of messages from 0 (info) to 3 (debug). Enabling debugging messages can slow down the program.
+Available levels: 0 (info), 1 (performance), 2 (verbose), 3 (debug).
+Default: 0.
+.TP
+.BR \-\-perf
+Enable performance messages (same as \-\-log\-level=1). Default: disabled.
+.TP
+.BR \-\-verbose
+Enable verbose messages and lower (same as \-\-log\-level=2). Default: disabled.
+.TP
+.BR \-\-debug
+Enable debug messages and lower (same as \-\-log\-level=3). Default: disabled.
+.TP
+.BR \-\-force\-log\-colors
+Force color logging. Default: colored if stderr is a TTY.
+.TP
+.BR \-\-no\-log\-colors
+Disable color logging. Default: ditto.
+
+.SS "Help options"
+.TP
+.BR \-h ", " \-\-help
+Print this text and exit.
+.TP
+.BR \-v ", " \-\-version
+Print version and exit.
+
+.SH "SEE ALSO"
+.BR ustreamer (1)
+
+.SH BUGS
+Please file any bugs and issues at \fIhttps://github.com/pikvm/ustreamer/issues\fR
+
+.SH AUTHOR
+Maxim Devaev <mdevaev@gmail.com>
+
+.SH HOMEPAGE
+\fIhttps://pikvm.org/\fR
+
+.SH COPYRIGHT
+GNU General Public License v3.0

man/ustreamer.1

@@ -0,0 +1,333 @@
+.\" Manpage for ustreamer.
+.\" Open an issue or pull request to https://github.com/pikvm/ustreamer to correct errors or typos
+.TH USTREAMER 1 "version 5.4" "November 2020"
+
+.SH NAME
+ustreamer \- stream MJPEG video from any V4L2 device to the network
+
+.SH SYNOPSIS
+.B ustreamer
+.RI [OPTIONS]
+
+.SH DESCRIPTION
+µStreamer (\fBustreamer\fP) is a lightweight and very quick server to stream MJPEG video from any V4L2 device to the network. All new browsers have native support of this video format, as well as most video players such as mplayer, VLC etc. µStreamer is a part of the Pi-KVM project designed to stream VGA and HDMI screencast hardware data with the highest resolution and FPS possible.
+
+.SH USAGE
+Without arguments, \fBustreamer\fR will try to open \fB/dev/video0\fR with 640x480 resolution and start streaming on \fBhttp://127\.0\.0\.1:8080\fR\. You can override this behavior using parameters \fB\-\-device\fR, \fB\-\-host\fR and \fB\-\-port\fR\. For example, to stream to the world, run: \fBustreamer --device=/dev/video1 --host=0.0.0.0 --port=80\fR
+
+Please note that since µStreamer v2\.0 cross\-domain requests were disabled by default for security reasons\. To enable the old behavior, use the option \fB\-\-allow\-origin=\e*\fR\.
+
+For example, the recommended way of running µStreamer with Auvidea B101 on a Raspberry Pi is:
+
+\fBustreamer \e\fR
+.RS
+\fB\-\-format=uyvy \e\fR # Device input format
+.nf
+\fB\-\-encoder=m2m-image \e\fR # Hardware encoding with V4L2 M2M intraface
+.nf
+\fB\-\-workers=3 \e\fR # Maximum workers for V4L2 encoder
+.nf
+\fB\-\-persistent \e\fR # Don\'t re\-initialize device on timeout (for example when HDMI cable was disconnected)
+.nf
+\fB\-\-dv\-timings \e\fR # Use DV\-timings
+.nf
+\fB\-\-drop\-same\-frames=30\fR # Save the traffic\fR
+.RE
+.P
+Please note that to use \fB\-\-drop\-same\-frames\fR for different browsers you need to use some specific URL \fB/stream\fR parameters (see URL \fB/\fR for details)\.
+.P
+You can always view the full list of options with \fBustreamer \-\-help\fR\. Some features may not be available on your platform. To find out which features are enabled, use \fBustreamer \-\-features\fR.
+
+.SH OPTIONS
+.SS "Capturing options"
+.TP
+.BR \-d\ \fI/dev/path ", " \-\-device\ \fI/dev/path
+Path to V4L2 device. Default: /dev/video0.
+.TP
+.BR \-i\ \fIN ", " \-\-input\ \fIN
+Input channel. Default: 0.
+.TP
+.BR \-r\ \fIWxH ", " \-\-resolution\ \fIWxH
+Initial image resolution. Default: 640x480.
+.TP
+.BR \-m\ \fIfmt ", " \-\-format\ \fIfmt
+Image format.
+Available: YUYV, UYVY, RGB565, RGB24, JPEG; default: YUYV.
+.TP
+.BR \-a\ \fIstd ", " \-\-tv\-standard\ \fIstd
+Force TV standard.
+Available: PAL, NTSC, SECAM; default: disabled.
+.TP
+.BR \-I\ \fImethod ", " \-\-io\-method\ \fImethod
+Set V4L2 IO method (see kernel documentation). Changing of this parameter may increase the performance. Or not.
+Available: MMAP, USERPTR; default: MMAP.
+.TP
+.BR \-f\ \fIN ", " \-\-desired\-fps\ \fIN
+Desired FPS. Default: maximum possible.
+.TP
+.BR \-z\ \fIN ", " \-\-min\-frame\-size\ \fIN
+Drop frames smaller then this limit. Useful if the device produces small\-sized garbage frames. Default: 128 bytes.
+.TP
+.BR \-n ", " \-\-persistent
+Don't re\-initialize device on timeout. Default: disabled.
+.TP
+.BR \-t ", " \-\-dv\-timings
+Enable DV-timings querying and events processing to automatic resolution change. Default: disabled.
+.TP
+.BR \-b\ \fIN ", " \-\-buffers\ \fIN
+The number of buffers to receive data from the device. Each buffer may processed using an independent thread.
+Default: 2 (the number of CPU cores (but not more than 4) + 1).
+.TP
+.BR \-w\ \fIN ", " \-\-workers\ \fIN
+The number of worker threads but not more than buffers.
+Default: 1 (the number of CPU cores (but not more than 4)).
+.TP
+.BR \-q\ \fIN ", " \-\-quality\ \fIN
+Set quality of JPEG encoding from 1 to 100 (best). Default: 80.
+Note: If HW encoding is used (JPEG source format selected), this parameter attempts to configure the camera or capture device hardware's internal encoder. It does not re\-encode MJPEG to MJPEG to change the quality level for sources that already output MJPEG.
+.TP
+.BR \-c\ \fItype ", " \-\-encoder\ \fItype
+Use specified encoder. It may affect the number of workers.
+
+CPU ─ Software MJPEG encoding (default).
+
+HW ─ Use pre-encoded MJPEG frames directly from camera hardware.
+
+M2M-VIDEO ─ GPU-accelerated MJPEG encoding.
+
+M2M-IMAGE ─ GPU-accelerated JPEG encoding.
+
+NOOP ─ Don't compress MJPEG stream (do nothing).
+.TP
+.BR \-g\ \fIWxH,... ", " \-\-glitched\-resolutions\ \fIWxH,...
+It doesn't do anything. Still here for compatibility.
+.TP
+.BR \-k\ \fIpath ", " \-\-blank\ \fIpath
+Path to JPEG file that will be shown when the device is disconnected during the streaming. Default: black screen 640x480 with 'NO SIGNAL'.
+.TP
+.BR \-K\ \fIsec ", " \-\-last\-as\-blank\ \fIsec
+Show the last frame received from the camera after it was disconnected, but no more than specified time (or endlessly if 0 is specified). If the device has not yet been online, display 'NO SIGNAL' or the image specified by option \-\-blank. Note: currently this option has no effect on memory sinks. Default: disabled.
+.TP
+.BR \-l ", " \-\-slowdown
+Slowdown capturing to 1 FPS or less when no stream or sink clients are connected. Useful to reduce CPU consumption. Default: disabled.
+.TP
+.BR \-\-device\-timeout\ \fIsec
+Timeout for device querying. Default: 1.
+.TP
+.BR \-\-device\-error\-delay\ \fIsec
+Delay before trying to connect to the device again after an error (timeout for example). Default: 1.
+.TP
+.BR \-\-m2m\-device\ \fI/dev/path
+Path to V4L2 mem-to-mem encoder device. Default: auto-select.
+
+.SS "Image control options"
+.TP
+.BR \-\-image\-default
+Reset all image settings below to default. Default: no change.
+.TP
+.BR \-\-brightness\ \fIN ", " \fIauto ", " \fIdefault
+Set brightness. Default: no change.
+.TP
+.BR \-\-contrast\ \fIN ", " \fIdefault
+Set contrast. Default: no change.
+.TP
+.BR \-\-saturation\ \fIN ", " \fIdefault
+Set saturation. Default: no change.
+.TP
+.BR \-\-hue\ \fIN ", " \fIauto ", " \fIdefault
+Set hue. Default: no change.
+.TP
+.BR \-\-gamma\ \fIN ", " \fIdefault
+Set gamma. Default: no change.
+.TP
+.BR \-\-sharpness\ \fIN ", " \fIdefault
+Set sharpness. Default: no change.
+.TP
+.BR \-\-backlight\-compensation\ \fIN ", " \fIdefault
+Set backlight compensation. Default: no change.
+.TP
+.BR \-\-white\-balance\ \fIN ", " \fIauto ", " \fIdefault
+Set white balance. Default: no change.
+.TP
+.BR \-\-gain\ \fIN ", " \fIauto ", " \fIdefault
+Set gain. Default: no change.
+.TP
+.BR \-\-color\-effect\ \fIN ", " \fIdefault
+Set color effect. Default: no change.
+.TP
+.BR \-\-flip\-vertical\ \fI1 ", " \fI0 ", " \fIdefault
+Set vertical flip. Default: no change.
+.TP
+.BR \-\-flip\-horizontal\ \fI1 ", " \fI0 ", " \fIdefault
+Set horizontal flip. Default: no change.
+
+.SS "HTTP server options"
+.TP
+.BR \-s\ \fIaddress ", " \-\-host\ \fIaddress
+Listen on Hostname or IP. Default: 127.0.0.1.
+.TP
+.BR \-p\ \fIN ", " \-\-port\ \fIN
+Bind to this TCP port. Default: 8080.
+.TP
+.BR \-U\ \fIpath ", " \-\-unix\ \fIpath
+Bind to UNIX domain socket. Default: disabled.
+.TP
+.BR \-D ", " \-\-unix\-rm
+Try to remove old unix socket file before binding. default: disabled.
+.TP
+.BR \-M\ \fImode ", " \-\-unix\-mode\ \fImode
+Set UNIX socket file permissions (like 777). Default: disabled.
+.TP
+.BR \-S ", " \-\-systemd
+Bind to systemd socket for socket activation. Required \fBWITH_SYSTEMD\fR feature. Default: disabled.
+.TP
+.BR \-\-user\ \fIname
+HTTP basic auth user. Default: disabled.
+.TP
+.BR \-\-passwd\ \fIstr
+HTTP basic auth passwd. Default: empty.
+.TP
+.BR \-\-static\ \fIpath
+Path to dir with static files instead of embedded root index page. Symlinks are not supported for security reasons. Default: disabled.
+.TP
+.BR \-e\ \fIN ", " \-\-drop\-same\-frames\ \fIN
+Don't send identical frames to clients, but no more than specified number. It can significantly reduce the outgoing traffic, but will increase the CPU loading. Don't use this option with analog signal sources or webcams, it's useless. Default: disabled.
+.TP
+.BR \-R\ \fIWxH ", " \-\-fake\-resolution\ \fIWxH
+Override image resolution for the /state. Default: disabled.
+.TP
+.BR \-\-tcp\-nodelay
+Set TCP_NODELAY flag to the client /stream socket. Only for TCP socket.
+Default: disabled.
+.TP
+.BR \-\-allow\-origin\ \fIstr
+Set Access\-Control\-Allow\-Origin header. Default: disabled.
+.TP
+.BR \-\-server\-timeout\ \fIsec
+Timeout for client connections. Default: 10.
+
+.SS "JPEG sink options"
+With shared memory sink you can write a stream to a file. See \fBustreamer-dump\fR(1) for more info.
+.TP
+.BR \-\-sink\ \fIname
+Use the specified shared memory object to sink JPEG frames. Default: disabled.
+.TP
+.BR \-\-sink\-mode\ \fImode
+Set JPEG sink permissions (like 777). Default: 660.
+.TP
+.BR \-\-sink\-rm
+Remove shared memory on stop. Default: disabled.
+.TP
+.BR \-\-sink\-client\-ttl\ \fIsec
+Client TTL. Default: 10.
+.TP
+.BR \-\-sink\-timeout\ \fIsec
+Timeout for lock. Default: 1.
+
+.SS "H264 sink options"
+.TP
+.BR \-\-h264\-sink\ \fIname
+Use the specified shared memory object to sink H264 frames. Default: disabled.
+.TP
+.BR \-\-h264\-sink\-mode\ \fImode
+Set H264 sink permissions (like 777). Default: 660.
+.TP
+.BR \-\-h264\-sink\-rm
+Remove shared memory on stop. Default: disabled.
+.TP
+.BR \-\-h264\-sink\-client\-ttl\ \fIsec
+Client TTL. Default: 10.
+.TP
+.BR \-\-h264\-sink\-timeout\ \fIsec
+Timeout for lock. Default: 1.
+.TP
+.BR \-\-h264\-bitrate\ \fIkbps
+H264 bitrate in Kbps. Default: 5000.
+.TP
+.BR \-\-h264\-gop\ \fIN
+Intarval between keyframes. Default: 30.
+.TP
+.BR \-\-h264\-m2m\-device\ \fI/dev/path
+Path to V4L2 mem-to-mem encoder device. Default: auto-select.
+
+
+.SS "Process options"
+.TP
+.BR \-\-exit\-on\-parent\-death
+Exit the program if the parent process is dead. Required \fBHAS_PDEATHSIG\fR feature. Default: disabled.
+.TP
+.BR \-\-exit\-on\-no\-clients \fIsec
+Exit the program if there have been no stream or sink clients or any HTTP requests in the last N seconds. Default: 0 (disabled).
+.TP
+.BR \-\-process\-name\-prefix\ \fIstr
+Set process name prefix which will be displayed in the process list like '\fIstr: ustreamer \-\-blah\-blah\-blah'\fR. Required \fBWITH_SETPROCTITLE\fR feature. Default: disabled.
+.TP
+.BR \-\-notify\-parent
+Send SIGUSR2 to the parent process when the stream parameters are changed. Checking changes is performed for the online flag and image resolution. Required \fBWITH_SETPROCTITLE\fR feature.
+
+.SS "GPIO options"
+Available only if \fBWITH_GPIO\fR feature enabled.
+.TP
+.BR \-\-gpio\-device\ \fI/dev/path
+Path to GPIO character device. Default: /dev/gpiochip0.
+.TP
+.BR \-\-gpio\-consumer\-prefix\ \fIstr
+Consumer prefix for GPIO outputs. Default: ustreamer.
+.TP
+.BR \-\-gpio\-prog\-running\ \fIpin
+Set 1 on GPIO pin while µStreamer is running. Default: disabled.
+.TP
+.BR \-\-gpio\-stream\-online\ \fIpin
+Set 1 while streaming. Default: disabled.
+.TP
+.BR \-\-gpio\-has\-http\-clients\ \fIpin
+Set 1 while stream has at least one client. Default: disabled.
+
+.SS "Logging options"
+.TP
+.BR \-\-log\-level\ \fIN
+Verbosity level of messages from 0 (info) to 3 (debug). Enabling debugging messages can slow down the program.
+Available levels: 0 (info), 1 (performance), 2 (verbose), 3 (debug).
+Default: 0.
+.TP
+.BR \-\-perf
+Enable performance messages (same as \-\-log\-level=1). Default: disabled.
+.TP
+.BR \-\-verbose
+Enable verbose messages and lower (same as \-\-log\-level=2). Default: disabled.
+.TP
+.BR \-\-debug
+Enable debug messages and lower (same as \-\-log\-level=3). Default: disabled.
+.TP
+.BR \-\-force\-log\-colors
+Force color logging. Default: colored if stderr is a TTY.
+.TP
+.BR \-\-no\-log\-colors
+Disable color logging. Default: ditto.
+
+.SS "Help options"
+.TP
+.BR \-h ", " \-\-help
+Print this text and exit.
+.TP
+.BR \-v ", " \-\-version
+Print version and exit.
+.TP
+.BR \-\-features
+Print list of supported features.
+
+.SH "SEE ALSO"
+.BR ustreamer-dump (1)
+
+.SH BUGS
+Please file any bugs and issues at \fIhttps://github.com/pikvm/ustreamer/issues\fR
+
+.SH AUTHOR
+Maxim Devaev <mdevaev@gmail.com>
+
+.SH HOMEPAGE
+\fIhttps://pikvm.org/\fR
+
+.SH COPYRIGHT
+GNU General Public License v3.0
+

pkg/arch/PKGBUILD

@@ -0,0 +1,48 @@
+# Contributor: Maxim Devaev <mdevaev@gmail.com>
+# Author: Maxim Devaev <mdevaev@gmail.com>
+
+
+pkgname=ustreamer
+pkgver=5.4
+pkgrel=1
+pkgdesc="Lightweight and fast MJPEG-HTTP streamer"
+url="https://github.com/pikvm/ustreamer"
+license=(GPL)
+arch=(i686 x86_64 armv6h armv7h aarch64)
+depends=(libjpeg libevent libbsd libgpiod systemd)
+makedepends=(gcc make systemd)
+source=(${pkgname}::"git+https://github.com/pikvm/ustreamer#commit=v${pkgver}")
+md5sums=(SKIP)
+
+
+_options="WITH_GPIO=1 WITH_SYSTEMD=1"
+if [ -e /usr/bin/python3 ]; then
+	_options="$_options WITH_PYTHON=1"
+	depends+=(python)
+	makedepends+=(python-setuptools)
+fi
+if [ -e /usr/include/janus/plugins/plugin.h ];then
+	depends+=(janus-gateway-pikvm)
+	makedepends+=(janus-gateway-pikvm)
+	_options="$_options WITH_JANUS=1"
+fi
+
+
+# LD does not link mmal with this option
+# This DOESN'T affect setup.py
+LDFLAGS="${LDFLAGS//--as-needed/}"
+export LDFLAGS="${LDFLAGS//,,/,}"
+
+
+build() {
+	cd "$srcdir"
+	rm -rf $pkgname-build
+	cp -r $pkgname $pkgname-build
+	cd $pkgname-build
+	make $_options CFLAGS="$CFLAGS" LDFLAGS="$LDFLAGS" $MAKEFLAGS
+}
+
+package() {
+	cd "$srcdir/$pkgname-build"
+	make $_options CFLAGS="$CFLAGS" LDFLAGS="$LDFLAGS" DESTDIR="$pkgdir" PREFIX=/usr install
+}

pkg/docker/Dockerfile.arm.cross

@@ -0,0 +1,39 @@
+FROM balenalib/raspberrypi3-debian:build as build
+
+RUN ["cross-build-start"]
+
+RUN apt-get update \
+	&& apt-get install -y --no-install-recommends \
+		gcc \
+		libjpeg8-dev \
+		libbsd-dev \
+		libgpiod-dev \
+	&& rm -rf /var/lib/apt/lists/*
+
+WORKDIR /build/ustreamer/
+COPY . .
+RUN make -j5 WITH_GPIO=1
+RUN ["cross-build-end"]
+
+FROM balenalib/raspberrypi3-debian:run as RUN
+
+RUN ["cross-build-start"]
+
+RUN apt-get update \
+	&& apt-get install -y --no-install-recommends \
+		libevent-2.1 \
+		libevent-pthreads-2.1-6 \
+		libjpeg8 \
+		libbsd0 \
+		libgpiod2 \
+	&& rm -rf /var/lib/apt/lists/*
+
+RUN ["cross-build-end"]
+
+WORKDIR /ustreamer
+COPY --from=build /build/ustreamer/ustreamer .
+
+EXPOSE 8080
+ENTRYPOINT ["./ustreamer", "--host=::"]
+
+# vim: syntax=dockerfile

pkg/docker/Dockerfile.arm.native

@@ -0,0 +1,32 @@
+FROM balenalib/raspberrypi3-debian:build as build
+
+RUN apt-get update \
+	&& apt-get install -y --no-install-recommends \
+		gcc \
+		libjpeg8-dev \
+		libbsd-dev \
+		libgpiod-dev \
+	&& rm -rf /var/lib/apt/lists/*
+
+WORKDIR /build/ustreamer/
+COPY . .
+RUN make -j5 WITH_GPIO=1
+
+FROM balenalib/raspberrypi3-debian:run as RUN
+
+RUN apt-get update \
+	&& apt-get install -y --no-install-recommends \
+		libevent-2.1 \
+		libevent-pthreads-2.1-6 \
+		libjpeg8 \
+		libbsd0 \
+		libgpiod2 \
+	&& rm -rf /var/lib/apt/lists/*
+
+WORKDIR /ustreamer
+COPY --from=build /build/ustreamer/ustreamer .
+
+EXPOSE 8080
+ENTRYPOINT ["./ustreamer", "--host=::"]
+
+# vim: syntax=dockerfile

pkg/docker/Dockerfile.x64.native

@@ -0,0 +1,38 @@
+FROM debian:buster-slim as build
+
+RUN apt-get update \
+	&& apt-get install -y \
+		ca-certificates \
+		make \
+		gcc \
+		git \
+		libevent-dev \
+		libjpeg62-turbo-dev \
+		libbsd-dev \
+		libgpiod-dev \
+	&& rm -rf /var/lib/apt/lists/*
+
+WORKDIR /build/ustreamer/
+COPY . .
+RUN make -j5 WITH_GPIO=1
+
+FROM debian:buster-slim as run
+
+RUN apt-get update \
+	&& apt-get install -y \
+		ca-certificates \
+		libevent-2.1 \
+		libevent-pthreads-2.1-6 \
+		libjpeg62-turbo \
+		libbsd0 \
+		libgpiod2 \
+	&& rm -rf /var/lib/apt/lists/*
+
+WORKDIR /ustreamer
+COPY --from=build /build/ustreamer/ustreamer .
+
+#ENV LD_LIBRARY_PATH=/opt/vc/lib
+EXPOSE 8080
+ENTRYPOINT ["./ustreamer", "--host=0.0.0.0"]
+
+# vim: syntax=dockerfile

pkg/gentoo/ustreamer-9999.ebuild

@@ -0,0 +1,30 @@
+# Copyright 2019 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit git-r3
+
+DESCRIPTION="uStreamer - Lightweight and fast MJPEG-HTTP streamer"
+HOMEPAGE="https://github.com/pikvm/ustreamer"
+EGIT_REPO_URI="https://github.com/pikvm/ustreamer.git"
+
+LICENSE="GPL-3"
+SLOT="0"
+KEYWORDS="~amd64"
+IUSE=""
+
+DEPEND="
+	>=dev-libs/libevent-2.1.8
+	>=media-libs/libjpeg-turbo-1.5.3
+	>=dev-libs/libbsd-0.9.1
+"
+RDEPEND="${DEPEND}"
+BDEPEND=""
+
+src_install() {
+	dobin ustreamer
+	dobin ustreamer-dump
+	doman man/ustreamer.1
+	doman man/ustreamer-dump.1
+}

pkg/openwrt/Makefile

@@ -0,0 +1,46 @@
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=ustreamer
+PKG_VERSION:=5.4
+PKG_RELEASE:=1
+PKG_MAINTAINER:=Maxim Devaev <mdevaev@gmail.com>
+
+PKG_SOURCE_PROTO:=git
+PKG_SOURCE_URL:=https://github.com/pikvm/ustreamer.git
+PKG_SOURCE_VERSION:=v$(PKG_VERSION)
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
+PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_VERSION)
+
+PKG_LICENSE:=GPL-3.0
+PKG_LICENSE_FILES:=LICENSE
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/ustreamer
+  SECTION:=multimedia
+  CATEGORY:=Multimedia
+  TITLE:=uStreamer
+  DEPENDS:=+libpthread +libjpeg +libv4l +libbsd +libevent2 +libevent2-core +libevent2-extra +libevent2-pthreads
+  URL:=https://github.com/pikvm/ustreamer
+endef
+
+define Package/ustreamer/description
+ µStreamer - Lightweight and fast MJPEG-HTTP streamer
+endef
+
+define Package/ustreamer/install
+	$(INSTALL_DIR) $(1)/usr/bin
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/ustreamer $(1)/usr/bin/
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/ustreamer-dump $(1)/usr/bin/
+	$(INSTALL_DIR) $(1)/etc/config
+	$(CP) ./files/ustreamer.config $(1)/etc/config/ustreamer
+	$(INSTALL_DIR) $(1)/etc/init.d
+	$(INSTALL_BIN) ./files/ustreamer.init $(1)/etc/init.d/ustreamer
+endef
+
+$(eval $(call BuildPackage,ustreamer))

pkg/openwrt/files/ustreamer.config

@@ -0,0 +1,19 @@
+
+config ustreamer
+	option enabled '0'
+
+	option device '/dev/video0'
+	option device_timeout '5'
+	option input '0'
+
+	option resolution '640x480'
+	option format 'YUYV'
+	option quality '80'
+	option desired_fps '0'
+	option encoder 'CPU'
+
+	option host '::'
+	option port '8080'
+	option static ''
+	option user ''
+	option password ''

pkg/openwrt/files/ustreamer.init

@@ -0,0 +1,54 @@
+#!/bin/sh /etc/rc.common
+# Copyright (C) 2009-2019 OpenWrt.org
+
+START=90
+STOP=10
+
+USE_PROCD=1
+PROG=/usr/bin/ustreamer
+
+getcfg() {
+	config_get value ustreamer $1 $2
+	return "$value"
+}
+
+start_instance() {
+	config_get_bool enabled ustreamer enabled 0
+	[ "$enabled" -eq 0 ] && return
+
+	local options=""
+
+	options="$options --device='`getcfg device /dev/video0`'"
+	options="$options --device-timeout='`getcfg device_timeout 5`'"
+	options="$options --input='`getcfg input 0`'"
+
+	options="$options --resolution='`getcfg resolution 640x480`'"
+	options="$options --format='`getcfg format YUYV`'"
+	options="$options --quality='`getcfg quality 80`'"
+	options="$options --desired-fps='`getcfg desired_fps 0`'"
+	options="$options --encoder='`getcfg encoder CPU`'"
+
+	options="$options --host='`getcfg host '::'`'"
+	local port=`getcfg port 8080`
+	options="$options --port='$port'"
+	options="$options --static='`getcfg static ''`'"
+	options="$options --user='`getcfg user ''`'"
+	options="$options --passwd='`getcfg password ''`'"
+
+	config-get-bool opt_slowdown ustreamer slowdown 1
+	[ "$slowdown" -eq 1 ] && options="$options --slowdown"
+
+	procd_open_instance
+	procd_set_param command "$PROG" $options
+	procd_add_mdns http tcp "$port" daemon=ustreamer
+	procd_close_instance
+}
+
+start_service() {
+	config_load ustreamer
+	config_foreach start_instance ustreamer
+}
+
+service_triggers() {
+	procd_add_reload_trigger ustreamer
+}

python/Makefile

@@ -0,0 +1,20 @@
+-include ../config.mk
+
+DESTDIR ?=
+PREFIX ?= /usr/local
+
+PY ?= python3
+
+
+# =====
+all:
+	$(info == PY_BUILD ustreamer-*.so)
+	@ $(PY) setup.py build
+
+
+install:
+	$(PY) setup.py install --prefix=$(PREFIX) --root=$(if $(DESTDIR),$(DESTDIR),/)
+
+
+clean:
+	rm -rf build

python/setup.py

@@ -0,0 +1,25 @@
+import os
+
+from setuptools import Extension
+from setuptools import setup
+
+
+# =====
+if __name__ == "__main__":
+    setup(
+        name="ustreamer",
+        version="5.4",
+        description="uStreamer tools",
+        author="Maxim Devaev",
+        author_email="mdevaev@gmail.com",
+        url="https://github.com/pikvm/ustreamer",
+        ext_modules=[
+            Extension(
+                "ustreamer",
+                libraries=["rt", "m", "pthread"],
+                undef_macros=["NDEBUG"],
+                sources=["src/" + name for name in os.listdir("src") if name.endswith(".c")],
+                depends=["src/" + name for name in os.listdir("src") if name.endswith(".h")],
+            ),
+        ],
+    )

python/src/frame.c

@@ -0,0 +1 @@
+../../src/libs/frame.c

python/src/frame.h

@@ -0,0 +1 @@
+../../src/libs/frame.h

python/src/memsinksh.h

@@ -0,0 +1 @@
+../../src/libs/memsinksh.h

python/src/tools.h

@@ -0,0 +1 @@
+../../src/libs/tools.h

python/src/ustreamer.c

@@ -0,0 +1,318 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <errno.h>
+
+#include <sys/types.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+
+#include <Python.h>
+
+#include "tools.h"
+#include "frame.h"
+#include "memsinksh.h"
+
+
+typedef struct {
+	PyObject_HEAD
+
+	char	*obj;
+	double	lock_timeout;
+	double	wait_timeout;
+	double	drop_same_frames;
+
+	int					fd;
+	memsink_shared_s	*mem;
+
+	uint64_t	frame_id;
+	long double	frame_ts;
+	frame_s		*frame;
+} MemsinkObject;
+
+
+#define MEM(_next)		self->mem->_next
+#define FRAME(_next)	self->frame->_next
+
+
+static void MemsinkObject_destroy_internals(MemsinkObject *self) {
+	if (self->mem != NULL) {
+		memsink_shared_unmap(self->mem);
+		self->mem = NULL;
+	}
+	if (self->fd > 0) {
+		close(self->fd);
+		self->fd = -1;
+	}
+	if (self->frame) {
+		frame_destroy(self->frame);
+		self->frame = NULL;
+	}
+}
+
+static int MemsinkObject_init(MemsinkObject *self, PyObject *args, PyObject *kwargs) {
+	self->lock_timeout = 1;
+	self->wait_timeout = 1;
+
+	static char *kws[] = {"obj", "lock_timeout", "wait_timeout", "drop_same_frames", NULL};
+	if (!PyArg_ParseTupleAndKeywords(
+		args, kwargs, "s|ddd", kws,
+		&self->obj, &self->lock_timeout, &self->wait_timeout, &self->drop_same_frames)) {
+		return -1;
+	}
+
+#	define SET_DOUBLE(_field, _cond) { \
+			if (!(self->_field _cond)) { \
+				PyErr_SetString(PyExc_ValueError, #_field " must be " #_cond); \
+				return -1; \
+			} \
+		}
+
+	SET_DOUBLE(lock_timeout, > 0);
+	SET_DOUBLE(wait_timeout, > 0);
+	SET_DOUBLE(drop_same_frames, >= 0);
+
+#	undef SET_DOUBLE
+
+	self->frame = frame_init();
+
+	if ((self->fd = shm_open(self->obj, O_RDWR, 0)) == -1) {
+		PyErr_SetFromErrno(PyExc_OSError);
+		goto error;
+	}
+
+	if ((self->mem = memsink_shared_map(self->fd)) == NULL) {
+		PyErr_SetFromErrno(PyExc_OSError);
+		goto error;
+	}
+
+	return 0;
+
+	error:
+		MemsinkObject_destroy_internals(self);
+		return -1;
+}
+
+static PyObject *MemsinkObject_repr(MemsinkObject *self) {
+	char repr[1024];
+	snprintf(repr, 1023, "<Memsink(%s)>", self->obj);
+	return Py_BuildValue("s", repr);
+}
+
+static void MemsinkObject_dealloc(MemsinkObject *self) {
+	MemsinkObject_destroy_internals(self);
+	PyObject_Del(self);
+}
+
+static PyObject *MemsinkObject_close(MemsinkObject *self, PyObject *Py_UNUSED(ignored)) {
+	MemsinkObject_destroy_internals(self);
+	Py_RETURN_NONE;
+}
+
+static PyObject *MemsinkObject_enter(MemsinkObject *self, PyObject *Py_UNUSED(ignored)) {
+	Py_INCREF(self);
+	return (PyObject *)self;
+}
+
+static PyObject *MemsinkObject_exit(MemsinkObject *self, PyObject *Py_UNUSED(ignored)) {
+	return PyObject_CallMethod((PyObject *)self, "close", "");
+}
+
+static int wait_frame(MemsinkObject *self) {
+	long double deadline_ts = get_now_monotonic() + self->wait_timeout;
+
+#	define RETURN_OS_ERROR { \
+			Py_BLOCK_THREADS \
+			PyErr_SetFromErrno(PyExc_OSError); \
+			return -1; \
+		}
+
+	long double now;
+	do {
+		Py_BEGIN_ALLOW_THREADS
+
+		int retval = flock_timedwait_monotonic(self->fd, self->lock_timeout);
+		now = get_now_monotonic();
+
+		if (retval < 0 && errno != EWOULDBLOCK) {
+			RETURN_OS_ERROR;
+
+		} else if (retval == 0) {
+			if (MEM(magic) == MEMSINK_MAGIC && MEM(version) == MEMSINK_VERSION && MEM(id) != self->frame_id) {
+				if (self->drop_same_frames > 0) {
+					if (
+						FRAME_COMPARE_META_USED_NOTS(self->mem, self->frame)
+						&& (self->frame_ts + self->drop_same_frames > now)
+						&& !memcmp(FRAME(data), MEM(data), MEM(used))
+					) {
+						self->frame_id = MEM(id);
+						goto drop;
+					}
+				}
+
+				Py_BLOCK_THREADS
+				return 0;
+			}
+
+			if (flock(self->fd, LOCK_UN) < 0) {
+				RETURN_OS_ERROR;
+			}
+		}
+
+		drop:
+
+		if (usleep(1000) < 0) {
+			RETURN_OS_ERROR;
+		}
+
+		Py_END_ALLOW_THREADS
+
+		if (PyErr_CheckSignals() < 0) {
+			return -1;
+		}
+	} while (now < deadline_ts);
+
+#	undef RETURN_OS_ERROR
+
+	return -2;
+}
+
+static PyObject *MemsinkObject_wait_frame(MemsinkObject *self, PyObject *Py_UNUSED(ignored)) {
+	if (self->mem == NULL || self->fd <= 0) {
+		PyErr_SetString(PyExc_RuntimeError, "Closed");
+		return NULL;
+	}
+
+	switch (wait_frame(self)) {
+		case 0: break;
+		case -2: Py_RETURN_NONE;
+		default: return NULL;
+	}
+
+	frame_set_data(self->frame, MEM(data), MEM(used));
+	FRAME_COPY_META(self->mem, self->frame);
+	self->frame_id = MEM(id);
+	self->frame_ts = get_now_monotonic();
+	MEM(last_client_ts) = self->frame_ts;
+
+	if (flock(self->fd, LOCK_UN) < 0) {
+		return PyErr_SetFromErrno(PyExc_OSError);
+	}
+
+	PyObject *dict_frame = PyDict_New();
+	if (dict_frame  == NULL) {
+		return NULL;
+	}
+
+#	define SET_VALUE(_key, _maker) { \
+			PyObject *_tmp = _maker; \
+			if (_tmp == NULL) { \
+				return NULL; \
+			} \
+			if (PyDict_SetItemString(dict_frame, _key, _tmp) < 0) { \
+				Py_DECREF(_tmp); \
+				return NULL; \
+			} \
+			Py_DECREF(_tmp); \
+		}
+#	define SET_NUMBER(_key, _from, _to) SET_VALUE(#_key, Py##_to##_From##_from(FRAME(_key)))
+
+	SET_NUMBER(width, Long, Long);
+	SET_NUMBER(height, Long, Long);
+	SET_NUMBER(format, Long, Long);
+	SET_NUMBER(stride, Long, Long);
+	SET_NUMBER(online, Long, Bool);
+	SET_NUMBER(key, Long, Bool);
+	SET_NUMBER(grab_ts, Double, Float);
+	SET_NUMBER(encode_begin_ts, Double, Float);
+	SET_NUMBER(encode_end_ts, Double, Float);
+	SET_VALUE("data", PyBytes_FromStringAndSize((const char *)FRAME(data), FRAME(used)));
+
+#	undef SET_NUMBER
+#	undef SET_VALUE
+
+	return dict_frame;
+}
+
+static PyObject *MemsinkObject_is_opened(MemsinkObject *self, PyObject *Py_UNUSED(ignored)) {
+	return PyBool_FromLong(self->mem != NULL && self->fd > 0);
+}
+
+#define FIELD_GETTER(_field, _from, _to) \
+	static PyObject *MemsinkObject_getter_##_field(MemsinkObject *self, void *Py_UNUSED(closure)) { \
+		return Py##_to##_From##_from(self->_field); \
+	}
+
+FIELD_GETTER(obj, String, Unicode)
+FIELD_GETTER(lock_timeout, Double, Float)
+FIELD_GETTER(wait_timeout, Double, Float)
+FIELD_GETTER(drop_same_frames, Double, Float)
+
+#undef FIELD_GETTER
+
+static PyMethodDef MemsinkObject_methods[] = {
+#	define ADD_METHOD(_name, _method, _flags) \
+		{.ml_name = _name, .ml_meth = (PyCFunction)MemsinkObject_##_method, .ml_flags = (_flags)}
+	ADD_METHOD("close", close, METH_NOARGS),
+	ADD_METHOD("__enter__", enter, METH_NOARGS),
+	ADD_METHOD("__exit__", exit, METH_VARARGS),
+	ADD_METHOD("wait_frame", wait_frame, METH_NOARGS),
+	ADD_METHOD("is_opened", is_opened, METH_NOARGS),
+	{},
+#	undef ADD_METHOD
+};
+
+static PyGetSetDef MemsinkObject_getsets[] = {
+#	define ADD_GETTER(_field) {.name = #_field, .get = (getter)MemsinkObject_getter_##_field}
+	ADD_GETTER(obj),
+	ADD_GETTER(lock_timeout),
+	ADD_GETTER(wait_timeout),
+	ADD_GETTER(drop_same_frames),
+	{},
+#	undef ADD_GETTER
+};
+
+static PyTypeObject MemsinkType = {
+	PyVarObject_HEAD_INIT(NULL, 0)
+	.tp_name		= "ustreamer.Memsink",
+	.tp_basicsize	= sizeof(MemsinkObject),
+	.tp_flags		= Py_TPFLAGS_DEFAULT,
+	.tp_new			= PyType_GenericNew,
+	.tp_init		= (initproc)MemsinkObject_init,
+	.tp_dealloc		= (destructor)MemsinkObject_dealloc,
+	.tp_repr		= (reprfunc)MemsinkObject_repr,
+	.tp_methods		= MemsinkObject_methods,
+	.tp_getset		= MemsinkObject_getsets,
+};
+
+static PyModuleDef ustreamer_Module = {
+	PyModuleDef_HEAD_INIT,
+	.m_name = "ustreamer",
+	.m_size = -1,
+};
+
+PyMODINIT_FUNC PyInit_ustreamer(void) { // cppcheck-suppress unusedFunction
+	PyObject *module = PyModule_Create(&ustreamer_Module);
+	if (module == NULL) {
+		return NULL;
+	}
+
+	if (PyType_Ready(&MemsinkType) < 0) {
+		return NULL;
+	}
+
+	Py_INCREF(&MemsinkType);
+
+	if (PyModule_AddObject(module, "Memsink", (PyObject *)&MemsinkType) < 0) {
+		return NULL;
+	}
+
+	return module;
+}
+
+#undef FRAME
+#undef MEM

src/Makefile

@@ -0,0 +1,108 @@
+DESTDIR ?=
+PREFIX ?= /usr/local
+
+CC ?= gcc
+CFLAGS ?= -O3
+LDFLAGS ?=
+
+
+# =====
+_USTR = ustreamer.bin
+_DUMP = ustreamer-dump.bin
+
+_CFLAGS = -MD -c -std=c11 -Wall -Wextra -D_GNU_SOURCE $(CFLAGS)
+_LDFLAGS = $(LDFLAGS)
+
+_COMMON_LIBS = -lm -ljpeg -pthread -lrt
+
+_USTR_LIBS = $(_COMMON_LIBS) -levent -levent_pthreads
+_USTR_SRCS = $(shell ls \
+	libs/*.c \
+	ustreamer/*.c \
+	ustreamer/http/*.c \
+	ustreamer/data/*.c \
+	ustreamer/encoders/cpu/*.c \
+	ustreamer/encoders/hw/*.c \
+	ustreamer/h264/*.c \
+)
+
+_DUMP_LIBS = $(_COMMON_LIBS)
+_DUMP_SRCS = $(shell ls \
+	libs/*.c \
+	dump/*.c \
+)
+
+_BUILD = build
+
+
+define optbool
+$(filter $(shell echo $(1) | tr A-Z a-z), yes on 1)
+endef
+
+
+ifneq ($(call optbool,$(WITH_GPIO)),)
+_USTR_LIBS += -lgpiod
+override _CFLAGS += -DWITH_GPIO
+_USTR_SRCS += $(shell ls ustreamer/gpio/*.c)
+endif
+
+
+ifneq ($(call optbool,$(WITH_SYSTEMD)),)
+_USTR_LIBS += -lsystemd
+override _CFLAGS += -DWITH_SYSTEMD
+_USTR_SRCS += $(shell ls ustreamer/http/systemd/*.c)
+endif
+
+
+WITH_PTHREAD_NP ?= 1
+ifneq ($(call optbool,$(WITH_PTHREAD_NP)),)
+override _CFLAGS += -DWITH_PTHREAD_NP
+endif
+
+
+WITH_SETPROCTITLE ?= 1
+ifneq ($(call optbool,$(WITH_SETPROCTITLE)),)
+ifeq ($(shell uname -s | tr A-Z a-z),linux)
+_USTR_LIBS += -lbsd
+endif
+override _CFLAGS += -DWITH_SETPROCTITLE
+endif
+
+
+# =====
+all: $(_USTR) $(_DUMP)
+
+
+install: all
+	mkdir -p $(DESTDIR)$(PREFIX)/bin
+	install -m755 $(_USTR) $(DESTDIR)$(PREFIX)/bin/$(subst .bin,,$(_USTR))
+	install -m755 $(_DUMP) $(DESTDIR)$(PREFIX)/bin/$(subst .bin,,$(_DUMP))
+
+
+install-strip: install
+	strip $(DESTDIR)$(PREFIX)/bin/$(subst .bin,,$(_USTR))
+	strip $(DESTDIR)$(PREFIX)/bin/$(subst .bin,,$(_DUMP))
+
+
+$(_USTR): $(_USTR_SRCS:%.c=$(_BUILD)/%.o)
+	$(info == LD $@)
+	@ $(CC) $^ -o $@ $(_LDFLAGS) $(_USTR_LIBS)
+
+
+$(_DUMP): $(_DUMP_SRCS:%.c=$(_BUILD)/%.o)
+	$(info == LD $@)
+	@ $(CC) $^ -o $@ $(_LDFLAGS) $(_DUMP_LIBS)
+
+
+$(_BUILD)/%.o: %.c
+	$(info -- CC $<)
+	@ mkdir -p $(dir $@) || true
+	@ $(CC) $< -o $@ $(_CFLAGS)
+
+
+clean:
+	rm -rf $(_USTR) $(_DUMP) $(_BUILD)
+
+
+_OBJS = $(_USTR_SRCS:%.c=$(_BUILD)/%.o) $(_DUMP_SRCS:%.c=$(_BUILD)/%.o)
+-include $(_OBJS:%.o=%.d)

src/data/blank_jpeg.h

@@ -1,688 +0,0 @@
-/*****************************************************************************
-#    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
-#                                                                            #
-#    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
-#                                                                            #
-#    This program is free software: you can redistribute it and/or modify    #
-#    it under the terms of the GNU General Public License as published by    #
-#    the Free Software Foundation, either version 3 of the License, or       #
-#    (at your option) any later version.                                     #
-#                                                                            #
-#    This program is distributed in the hope that it will be useful,         #
-#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
-#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
-#    GNU General Public License for more details.                            #
-#                                                                            #
-#    You should have received a copy of the GNU General Public License       #
-#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
-#                                                                            #
-*****************************************************************************/
-
-
-const unsigned BLANK_JPG_WIDTH = 640;
-const unsigned BLANK_JPG_HEIGHT = 480;
-
-const unsigned long BLANK_JPG_SIZE = 13845;
-
-const unsigned char BLANK_JPG_DATA[] = {
-	0xff, 0xd8, 0xff, 0xe1, 0x9, 0x50, 0x68, 0x74, 0x74, 0x70, 0x3a, 0x2f, 0x2f, 0x6e, 0x73, 0x2e, 0x61, 0x64, 0x6f, 0x62, 0x65,
-	0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x61, 0x70, 0x2f, 0x31, 0x2e, 0x30, 0x2f, 0x0, 0x3c, 0x3f, 0x78, 0x70, 0x61, 0x63, 0x6b,
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-	0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x7, 0xff, 0xd4, 0xaf,
-	0xfc, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
-	0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
-	0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x7, 0xff, 0xd5,
-	0xaf, 0xfc, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
-	0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
-	0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x7, 0xff,
-	0xd6, 0xaf, 0xfc, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
-	0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
-	0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x7,
-	0xff, 0xd7, 0xaf, 0xfc, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
-	0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
-	0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
-	0x7, 0xff, 0xd0, 0xaf, 0xfc, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
-	0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
-	0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
-	0x0, 0x7, 0xff, 0xd1, 0xaf, 0xfc, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
-	0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
-	0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
-	0x0, 0x0, 0x7, 0xff, 0xd2, 0xaf, 0xfc, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
-	0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
-	0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
-	0x0, 0x0, 0x0, 0x7, 0xff, 0xd9
-};

src/data/index.html

@@ -1,53 +0,0 @@
-<!DOCTYPE html>
-
-<html>
-<head>
-	<meta charset="utf-8" />
-	<title>uStreamer</title>
-</head>
-
-<body>
-	<h3>&micro;Streamer v%VERSION%</h3>
-	<hr>
-	<ul>
-		<li>
-			<a href="/ping"><b><samp>/ping</samp></b></a><br>
-			Get JSON structure with state of the server.
-		</li>
-		<br>
-		<li>
-			<a href="/snapshot"><b><samp>/snapshot</samp></b></a><br>
-			Get a current actual image from the server.
-		</li>
-		<br>
-		<li>
-			<a href="/stream"><b><samp>/stream</samp></b></a><br>
-			Get a live stream. Query params:<br>
-			<br>
-			<ul>
-				<li>
-					<b><samp>extra_headers=1</samp></b><br>
-					Add <samp>X-UStreamer-*</samp> headers to /stream handle (like on <a href="/snapshot"><samp>/snapshot</samp></a>).
-				</li>
-				<br>
-				<li>
-					<b><samp>advance_headers=1</samp></b><br>
-					Enable workaround for Chromium/Blink
-					<a href="https://bugs.chromium.org/p/chromium/issues/detail?id=527446">Bug #527446</a>.
-				</li>
-				<br>
-				<li>
-					<b><samp>dual_final_frames=1</samp></b><br>
-					Enable workaround for Safari/WebKit bug when using option <samp>--drop-same-frames</samp>.<br>
-					Without this option, when the frame series is completed, WebKit-based browsers<br>
-					renders the last one with a delay.
-				</li>
-			</ul>
-		</li>
-		<br>
-	</ul>
-	<br>
-	<hr>
-	<a href="https://github.com/pi-kvm/ustreamer">Sources &amp; docs</a>
-</body>
-</html>

src/device.c

@@ -1,458 +0,0 @@
-/*****************************************************************************
-#    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
-#                                                                            #
-#    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
-#                                                                            #
-#    This program is free software: you can redistribute it and/or modify    #
-#    it under the terms of the GNU General Public License as published by    #
-#    the Free Software Foundation, either version 3 of the License, or       #
-#    (at your option) any later version.                                     #
-#                                                                            #
-#    This program is distributed in the hope that it will be useful,         #
-#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
-#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
-#    GNU General Public License for more details.                            #
-#                                                                            #
-#    You should have received a copy of the GNU General Public License       #
-#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
-#                                                                            #
-*****************************************************************************/
-
-
-#include <stdlib.h>
-#include <stddef.h>
-#include <stdbool.h>
-#include <string.h>
-#include <strings.h>
-#include <unistd.h>
-#include <fcntl.h>
-
-#include <sys/mman.h>
-#include <linux/videodev2.h>
-
-#include "tools.h"
-#include "logging.h"
-#include "xioctl.h"
-#include "device.h"
-
-
-static const struct {
-	const char *name;
-	const v4l2_std_id standard;
-} _STANDARDS[] = {
-	{"UNKNOWN",	V4L2_STD_UNKNOWN},
-	{"PAL",		V4L2_STD_PAL},
-	{"NTSC",	V4L2_STD_NTSC},
-	{"SECAM",	V4L2_STD_SECAM},
-};
-
-static const struct {
-	const char *name;
-	const unsigned format;
-} _FORMATS[] = {
-	{"YUYV",	V4L2_PIX_FMT_YUYV},
-	{"UYVY",	V4L2_PIX_FMT_UYVY},
-	{"RGB565",	V4L2_PIX_FMT_RGB565},
-};
-
-
-static int _device_open_check_cap(struct device_t *dev);
-static int _device_open_dv_timings(struct device_t *dev);
-static int _device_apply_dv_timings(struct device_t *dev);
-static int _device_open_format(struct device_t *dev);
-static void _device_open_alloc_picbufs(struct device_t *dev);
-static int _device_open_mmap(struct device_t *dev);
-static int _device_open_queue_buffers(struct device_t *dev);
-
-static const char *_format_to_string_auto(char *buf, const size_t size, const unsigned format);
-static const char *_format_to_string_null(const unsigned format);
-static const char *_standard_to_string(const v4l2_std_id standard);
-
-
-struct device_t *device_init() {
-	struct device_runtime_t *run;
-	struct device_t *dev;
-
-	A_CALLOC(run, 1);
-	run->fd = -1;
-
-	A_CALLOC(dev, 1);
-	dev->path = "/dev/video0";
-	dev->width = 640;
-	dev->height = 480;
-	dev->format = V4L2_PIX_FMT_YUYV;
-	dev->standard = V4L2_STD_UNKNOWN;
-	dev->n_buffers = max_u(sysconf(_SC_NPROCESSORS_ONLN), 1) + 1;
-	dev->n_workers = dev->n_buffers;
-	dev->soft_fps = 30;
-	dev->timeout = 1;
-	dev->error_delay = 1;
-	dev->run = run;
-	return dev;
-}
-
-void device_destroy(struct device_t *dev) {
-	free(dev->run);
-	free(dev);
-}
-
-int device_parse_format(const char *const str) {
-	for (unsigned index = 0; index < sizeof(_FORMATS) / sizeof(_FORMATS[0]); ++index) {
-		if (!strcasecmp(str, _FORMATS[index].name)) {
-			return _FORMATS[index].format;
-		}
-	}
-	return FORMAT_UNKNOWN;
-}
-
-v4l2_std_id device_parse_standard(const char *const str) {
-	for (unsigned index = 1; index < sizeof(_STANDARDS) / sizeof(_STANDARDS[0]); ++index) {
-		if (!strcasecmp(str, _STANDARDS[index].name)) {
-			return _STANDARDS[index].standard;
-		}
-	}
-	return STANDARD_UNKNOWN;
-}
-
-int device_open(struct device_t *dev) {
-	if ((dev->run->fd = open(dev->path, O_RDWR|O_NONBLOCK)) < 0) {
-		LOG_PERROR("Can't open device");
-		goto error;
-	}
-	LOG_INFO("Device fd=%d opened", dev->run->fd);
-
-	if (_device_open_check_cap(dev) < 0) {
-		goto error;
-	}
-	if (_device_open_dv_timings(dev) < 0) {
-		goto error;
-	}
-	if (_device_open_format(dev) < 0) {
-		goto error;
-	}
-	if (_device_open_mmap(dev) < 0) {
-		goto error;
-	}
-	if (_device_open_queue_buffers(dev) < 0) {
-		goto error;
-	}
-	_device_open_alloc_picbufs(dev);
-
-	LOG_DEBUG("Device fd=%d initialized", dev->run->fd);
-	return 0;
-
-	error:
-		device_close(dev);
-		return -1;
-}
-
-void device_close(struct device_t *dev) {
-	if (dev->run->pictures) {
-		LOG_DEBUG("Releasing picture buffers ...");
-		for (unsigned index = 0; index < dev->run->n_buffers && dev->run->pictures[index].data; ++index) {
-			free(dev->run->pictures[index].data);
-			dev->run->pictures[index].data = NULL;
-		}
-		free(dev->run->pictures);
-		dev->run->pictures = NULL;
-	}
-
-	if (dev->run->hw_buffers) {
-		LOG_DEBUG("Unmapping HW buffers ...");
-		for (unsigned index = 0; index < dev->run->n_buffers; ++index) {
-			if (dev->run->hw_buffers[index].start != MAP_FAILED) {
-				if (munmap(dev->run->hw_buffers[index].start, dev->run->hw_buffers[index].length) < 0) {
-					LOG_PERROR("Can't unmap device buffer %d", index);
-				}
-			}
-		}
-		dev->run->n_buffers = 0;
-		free(dev->run->hw_buffers);
-		dev->run->hw_buffers = NULL;
-	}
-
-	if (dev->run->fd >= 0) {
-		LOG_DEBUG("Closing device ...");
-		if (close(dev->run->fd) < 0) {
-			LOG_PERROR("Can't close device fd=%d", dev->run->fd);
-		} else {
-			LOG_INFO("Device fd=%d closed", dev->run->fd);
-		}
-		dev->run->fd = -1;
-	}
-}
-
-static int _device_open_check_cap(struct device_t *dev) {
-	struct v4l2_capability cap;
-	int input = dev->input; // Needs pointer to int for ioctl()
-
-	MEMSET_ZERO(cap);
-
-	LOG_DEBUG("Calling ioctl(VIDIOC_QUERYCAP) ...");
-	if (xioctl(dev->run->fd, VIDIOC_QUERYCAP, &cap) < 0) {
-		LOG_PERROR("Can't query device (VIDIOC_QUERYCAP)");
-		return -1;
-	}
-
-	if (!(cap.capabilities & V4L2_CAP_VIDEO_CAPTURE)) {
-		LOG_ERROR("Video capture not supported by our device");
-		return -1;
-	}
-
-	if (!(cap.capabilities & V4L2_CAP_STREAMING)) {
-		LOG_ERROR("Device does not support streaming IO");
-		return -1;
-	}
-
-	LOG_INFO("Using input channel: %d", input);
-	if (xioctl(dev->run->fd, VIDIOC_S_INPUT, &input) < 0) {
-		LOG_ERROR("Can't set input channel");
-		return -1;
-	}
-
-	if (dev->standard != V4L2_STD_UNKNOWN) {
-		LOG_INFO("Using TV standard: %s", _standard_to_string(dev->standard));
-		if (xioctl(dev->run->fd, VIDIOC_S_STD, &dev->standard) < 0) {
-			LOG_ERROR("Can't set video standard");
-			return -1;
-		}
-	} else {
-		LOG_INFO("Using TV standard: DEFAULT");
-	}
-	return 0;
-}
-
-static int _device_open_dv_timings(struct device_t *dev) {
-	if (dev->dv_timings) {
-		LOG_DEBUG("Using DV-timings");
-
-		if (_device_apply_dv_timings(dev) < 0) {
-			return -1;
-		}
-
-		struct v4l2_event_subscription sub;
-
-		MEMSET_ZERO(sub);
-		sub.type = V4L2_EVENT_SOURCE_CHANGE;
-
-		LOG_DEBUG("Calling ioctl(VIDIOC_SUBSCRIBE_EVENT) ...");
-		if (xioctl(dev->run->fd, VIDIOC_SUBSCRIBE_EVENT, &sub) < 0) {
-			LOG_PERROR("Can't subscribe to V4L2_EVENT_SOURCE_CHANGE");
-			return -1;
-		}
-
-	} else {
-		dev->run->width = dev->width;
-		dev->run->height = dev->height;
-	}
-	return 0;
-}
-
-static int _device_apply_dv_timings(struct device_t *dev) {
-	struct v4l2_dv_timings dv_timings;
-
-	MEMSET_ZERO(dv_timings);
-
-	LOG_DEBUG("Calling ioctl(VIDIOC_QUERY_DV_TIMINGS) ...");
-	if (xioctl(dev->run->fd, VIDIOC_QUERY_DV_TIMINGS, &dv_timings) == 0) {
-		LOG_INFO(
-			"Got new DV timings: resolution=%dx%d; pixclk=%llu",
-			dv_timings.bt.width,
-			dv_timings.bt.height,
-			dv_timings.bt.pixelclock
-		);
-
-		LOG_DEBUG("Calling ioctl(VIDIOC_S_DV_TIMINGS) ...");
-		if (xioctl(dev->run->fd, VIDIOC_S_DV_TIMINGS, &dv_timings) < 0) {
-			LOG_PERROR("Failed to set DV timings");
-			return -1;
-		}
-
-		dev->run->width = dv_timings.bt.width;
-		dev->run->height = dv_timings.bt.height;
-
-	} else {
-		LOG_DEBUG("Calling ioctl(VIDIOC_QUERYSTD) ...");
-		if (xioctl(dev->run->fd, VIDIOC_QUERYSTD, &dev->standard) == 0) {
-			LOG_INFO("Applying the new VIDIOC_S_STD: %s ...", _standard_to_string(dev->standard));
-			if (xioctl(dev->run->fd, VIDIOC_S_STD, &dev->standard) < 0) {
-				LOG_PERROR("Can't set video standard");
-				return -1;
-			}
-		}
-	}
-	return 0;
-}
-
-static int _device_open_format(struct device_t *dev) {
-	struct v4l2_format fmt;
-
-	MEMSET_ZERO(fmt);
-	fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-	fmt.fmt.pix.width = dev->run->width;
-	fmt.fmt.pix.height = dev->run->height;
-	fmt.fmt.pix.pixelformat = dev->format;
-	fmt.fmt.pix.field = V4L2_FIELD_ANY;
-
-	// Set format
-	LOG_DEBUG("Calling ioctl(VIDIOC_S_FMT) ...");
-	if (xioctl(dev->run->fd, VIDIOC_S_FMT, &fmt) < 0) {
-		char format_str[8];
-
-		LOG_PERROR(
-			"Unable to set format=%s; resolution=%dx%d",
-			_format_to_string_auto(format_str, 8, dev->format),
-			dev->run->width,
-			dev->run->height
-		);
-		return -1;
-	}
-
-	// Check resolution
-	if (fmt.fmt.pix.width != dev->run->width || fmt.fmt.pix.height != dev->run->height) {
-		LOG_ERROR("Requested resolution=%dx%d is unavailable", dev->run->width, dev->run->height);
-	}
-	dev->run->width = fmt.fmt.pix.width;
-	dev->run->height = fmt.fmt.pix.height;
-	LOG_INFO("Using resolution: %dx%d", dev->run->width, dev->run->height);
-
-	// Check format
-	if (fmt.fmt.pix.pixelformat != dev->format) {
-		char format_requested_str[8];
-		char format_obtained_str[8];
-		char *format_str_nullable;
-
-		LOG_ERROR(
-			"Could not obtain the requested pixelformat=%s; driver gave us %s",
-			_format_to_string_auto(format_requested_str, 8, dev->format),
-			_format_to_string_auto(format_obtained_str, 8, fmt.fmt.pix.pixelformat)
-		);
-
-		if ((format_str_nullable = (char *)_format_to_string_null(fmt.fmt.pix.pixelformat)) != NULL) {
-			LOG_INFO(
-				"Falling back to %s mode (consider using '--format=%s' option)",
-				format_str_nullable,
-				format_str_nullable
-			);
-		} else {
-			LOG_ERROR("Unsupported pixel format");
-			return -1;
-		}
-	}
-	dev->run->format = fmt.fmt.pix.pixelformat;
-	return 0;
-}
-
-static int _device_open_mmap(struct device_t *dev) {
-	struct v4l2_requestbuffers req;
-
-	MEMSET_ZERO(req);
-	req.count = dev->n_buffers;
-	req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-	req.memory = V4L2_MEMORY_MMAP;
-
-	LOG_DEBUG("Calling ioctl(VIDIOC_REQBUFS) ...");
-	if (xioctl(dev->run->fd, VIDIOC_REQBUFS, &req)) {
-		LOG_PERROR("Device '%s' doesn't support memory mapping", dev->path);
-		return -1;
-	}
-
-	if (req.count < 1) {
-		LOG_ERROR("Insufficient buffer memory: %d", req.count);
-		return -1;
-	} else {
-		LOG_INFO("Requested %d HW buffers, got %d", dev->n_buffers, req.count);
-	}
-
-	LOG_DEBUG("Allocating HW buffers ...");
-
-	A_CALLOC(dev->run->hw_buffers, req.count);
-	for (dev->run->n_buffers = 0; dev->run->n_buffers < req.count; ++dev->run->n_buffers) {
-		struct v4l2_buffer buf_info;
-
-		MEMSET_ZERO(buf_info);
-		buf_info.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-		buf_info.memory = V4L2_MEMORY_MMAP;
-		buf_info.index = dev->run->n_buffers;
-
-		LOG_DEBUG("Calling ioctl(VIDIOC_QUERYBUF) for device buffer %d ...", dev->run->n_buffers);
-		if (xioctl(dev->run->fd, VIDIOC_QUERYBUF, &buf_info) < 0) {
-			LOG_PERROR("Can't VIDIOC_QUERYBUF");
-			return -1;
-		}
-
-		LOG_DEBUG("Mapping device buffer %d ...", dev->run->n_buffers);
-		dev->run->hw_buffers[dev->run->n_buffers].length = buf_info.length;
-		dev->run->hw_buffers[dev->run->n_buffers].start = mmap(NULL, buf_info.length, PROT_READ|PROT_WRITE, MAP_SHARED, dev->run->fd, buf_info.m.offset);
-		if (dev->run->hw_buffers[dev->run->n_buffers].start == MAP_FAILED) {
-			LOG_PERROR("Can't map device buffer %d", dev->run->n_buffers);
-			return -1;
-		}
-	}
-	return 0;
-}
-
-static int _device_open_queue_buffers(struct device_t *dev) {
-	for (unsigned index = 0; index < dev->run->n_buffers; ++index) {
-		struct v4l2_buffer buf_info;
-
-		MEMSET_ZERO(buf_info);
-		buf_info.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-		buf_info.memory = V4L2_MEMORY_MMAP;
-		buf_info.index = index;
-
-		LOG_DEBUG("Calling ioctl(VIDIOC_QBUF) for buffer %d ...", index);
-		if (xioctl(dev->run->fd, VIDIOC_QBUF, &buf_info) < 0) {
-			LOG_PERROR("Can't VIDIOC_QBUF");
-			return -1;
-		}
-	}
-	return 0;
-}
-
-static void _device_open_alloc_picbufs(struct device_t *dev) {
-	LOG_DEBUG("Allocating picture buffers ...");
-	A_CALLOC(dev->run->pictures, dev->run->n_buffers);
-
-	dev->run->max_picture_size = ((dev->run->width * dev->run->height) << 1) * 2;
-	for (unsigned index = 0; index < dev->run->n_buffers; ++index) {
-		LOG_DEBUG("Allocating picture buffer %d sized %lu bytes... ", index, dev->run->max_picture_size);
-		A_CALLOC(dev->run->pictures[index].data, dev->run->max_picture_size);
-		dev->run->pictures[index].allocated = dev->run->max_picture_size;
-	}
-}
-
-static const char *_format_to_string_auto(char *buf, const size_t size, const unsigned format) {
-	assert(size >= 8);
-	buf[0] = format & 0x7f;
-	buf[1] = (format >> 8) & 0x7f;
-	buf[2] = (format >> 16) & 0x7f;
-	buf[3] = (format >> 24) & 0x7f;
-	if (format & (1 << 31)) {
-		buf[4] = '-';
-		buf[5] = 'B';
-		buf[6] = 'E';
-		buf[7] = '\0';
-	} else {
-		buf[4] = '\0';
-	}
-	return buf;
-}
-
-static const char *_format_to_string_null(const unsigned format) {
-    for (unsigned index = 0; index < sizeof(_FORMATS) / sizeof(_FORMATS[0]); ++index) {
-		if (format == _FORMATS[index].format) {
-			return _FORMATS[index].name;
-		}
-    }
-    return NULL;
-}
-
-static const char *_standard_to_string(v4l2_std_id standard) {
-	for (unsigned index = 0; index < sizeof(_STANDARDS) / sizeof(_STANDARDS[0]); ++index) {
-		if (standard == _STANDARDS[index].standard) {
-			return _STANDARDS[index].name;
-		}
-	}
-	return _STANDARDS[0].name;
-}

src/device.h

@@ -1,94 +0,0 @@
-/*****************************************************************************
-#    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
-#                                                                            #
-#    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
-#                                                                            #
-#    This program is free software: you can redistribute it and/or modify    #
-#    it under the terms of the GNU General Public License as published by    #
-#    the Free Software Foundation, either version 3 of the License, or       #
-#    (at your option) any later version.                                     #
-#                                                                            #
-#    This program is distributed in the hope that it will be useful,         #
-#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
-#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
-#    GNU General Public License for more details.                            #
-#                                                                            #
-#    You should have received a copy of the GNU General Public License       #
-#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
-#                                                                            #
-*****************************************************************************/
-
-
-#pragma once
-
-#include <stddef.h>
-#include <stdbool.h>
-#include <signal.h>
-
-#include <linux/videodev2.h>
-
-
-#define STANDARD_UNKNOWN	V4L2_STD_UNKNOWN
-#define STANDARDS_STR		"UNKNOWN, PAL, NTSC, SECAM"
-
-#define FORMAT_UNKNOWN	-1
-#define FORMATS_STR		"YUYV, UYVY, RGB565"
-
-
-struct hw_buffer_t {
-	void	*start;
-	size_t	length;
-};
-
-struct picture_t {
-	unsigned char	*data;
-	unsigned long	size;
-	unsigned long	allocated;
-	long double		grab_time;
-	long double		encode_begin_time;
-	long double		encode_end_time;
-};
-
-struct device_runtime_t {
-	int					fd;
-	unsigned			width;
-	unsigned			height;
-	unsigned			format;
-	unsigned			n_buffers;
-	unsigned			n_workers;
-	struct hw_buffer_t	*hw_buffers;
-	struct picture_t	*pictures;
-	unsigned long		max_picture_size;
-	bool				capturing;
-};
-
-struct device_t {
-	char			*path;
-	unsigned		input;
-	unsigned		width;
-	unsigned		height;
-	unsigned		format;
-	v4l2_std_id		standard;
-	bool			dv_timings;
-	unsigned		n_buffers;
-	unsigned		n_workers;
-	unsigned		soft_fps;
-	unsigned		every_frame;
-	unsigned		min_frame_size;
-	bool			persistent;
-	unsigned		timeout;
-	unsigned		error_delay;
-
-	struct device_runtime_t *run;
-	sig_atomic_t volatile stop;
-};
-
-
-struct device_t *device_init();
-void device_destroy(struct device_t *dev);
-
-int device_parse_format(const char *const str);
-v4l2_std_id device_parse_standard(const char *const str);
-
-int device_open(struct device_t *dev);
-void device_close(struct device_t *dev);

src/dump/file.c

@@ -0,0 +1,79 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#include "file.h"
+
+
+output_file_s *output_file_init(const char *path, bool json) {
+	output_file_s *output;
+	A_CALLOC(output, 1);
+
+	if (!strcmp(path, "-")) {
+		LOG_INFO("Using output: <stdout>");
+		output->fp = stdout;
+	} else {
+		LOG_INFO("Using output: %s", path);
+		if ((output->fp = fopen(path, "wb")) == NULL) {
+			LOG_PERROR("Can't open output file");
+			goto error;
+		}
+	}
+
+	output->json = json;
+	return output;
+
+	error:
+		output_file_destroy(output);
+		return NULL;
+}
+
+void output_file_write(void *v_output, const frame_s *frame) {
+	output_file_s *output = (output_file_s *)v_output;
+	if (output->json) {
+		base64_encode(frame->data, frame->used, &output->base64_data, &output->base64_allocated);
+		fprintf(output->fp,
+			"{\"size\": %zu, \"width\": %u, \"height\": %u,"
+			" \"format\": %u, \"stride\": %u, \"online\": %u,"
+			" \"grab_ts\": %.3Lf, \"encode_begin_ts\": %.3Lf, \"encode_end_ts\": %.3Lf,"
+			" \"data\": \"%s\"}\n",
+			frame->used, frame->width, frame->height,
+			frame->format, frame->stride, frame->online,
+			frame->grab_ts, frame->encode_begin_ts, frame->encode_end_ts,
+			output->base64_data);
+	} else {
+		fwrite(frame->data, 1, frame->used, output->fp);
+	}
+	fflush(output->fp);
+}
+
+void output_file_destroy(void *v_output) {
+	output_file_s *output = (output_file_s *)v_output;
+	if (output->base64_data) {
+		free(output->base64_data);
+	}
+	if (output->fp && output->fp != stdout) {
+		if (fclose(output->fp) < 0) {
+			LOG_PERROR("Can't close output file");
+		}
+	}
+	free(output);
+}

src/dump/file.h

@@ -1,7 +1,8 @@
 /*****************************************************************************
-#    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
 #                                                                            #
-#    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
 #                                                                            #
 #    This program is free software: you can redistribute it and/or modify    #
 #    it under the terms of the GNU General Public License as published by    #
@@ -21,35 +22,28 @@
 
 #pragma once
 
+#include <stdio.h>
+#include <stdlib.h>
 #include <stdbool.h>
 
-#include <IL/OMX_Component.h>
-#include <interface/vcos/vcos_semaphore.h>
+#include <sys/types.h>
 
-#include "../device.h"
+#include "../libs/tools.h"
+#include "../libs/logging.h"
+#include "../libs/frame.h"
+#include "../libs/base64.h"
 
 
-#define OMX_MAX_ENCODERS 3
+typedef struct {
+	const char *path;
+	bool		json;
+
+	FILE		*fp;
+	char		*base64_data;
+	size_t		base64_allocated;
+} output_file_s;
 
 
-struct omx_encoder_t {
-	OMX_HANDLETYPE			encoder;
-	OMX_BUFFERHEADERTYPE	*input_buffer;
-	OMX_BUFFERHEADERTYPE	*output_buffer;
-	bool					input_required;
-	bool					output_available;
-	bool					failed;
-	VCOS_SEMAPHORE_T		handler_lock;
-
-	bool	i_handler_lock;
-	bool	i_encoder;
-	bool	i_input_port_enabled;
-	bool	i_output_port_enabled;
-};
-
-
-struct omx_encoder_t *omx_encoder_init();
-void omx_encoder_destroy(struct omx_encoder_t *omx);
-
-int omx_encoder_prepare_live(struct omx_encoder_t *omx, struct device_t *dev, const unsigned quality, const bool use_ijg);
-int omx_encoder_compress_buffer(struct omx_encoder_t *omx, struct device_t *dev, const unsigned index);
+output_file_s *output_file_init(const char *path, bool json);
+void output_file_write(void *v_output, const frame_s *frame);
+void output_file_destroy(void *v_output);

src/dump/main.c

@@ -0,0 +1,346 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <signal.h>
+#include <limits.h>
+#include <float.h>
+#include <getopt.h>
+#include <errno.h>
+#include <assert.h>
+
+#include "../libs/config.h"
+#include "../libs/tools.h"
+#include "../libs/logging.h"
+#include "../libs/frame.h"
+#include "../libs/memsink.h"
+#include "../libs/options.h"
+
+#include "file.h"
+
+
+enum _OPT_VALUES {
+	_O_SINK = 's',
+	_O_SINK_TIMEOUT = 't',
+	_O_OUTPUT = 'o',
+	_O_OUTPUT_JSON = 'j',
+	_O_COUNT = 'c',
+	_O_INTERVAL = 'i',
+
+	_O_HELP = 'h',
+	_O_VERSION = 'v',
+
+	_O_LOG_LEVEL = 10000,
+	_O_PERF,
+	_O_VERBOSE,
+	_O_DEBUG,
+	_O_FORCE_LOG_COLORS,
+	_O_NO_LOG_COLORS,
+};
+
+static const struct option _LONG_OPTS[] = {
+	{"sink",				required_argument,	NULL,	_O_SINK},
+	{"sink-timeout",		required_argument,	NULL,	_O_SINK_TIMEOUT},
+	{"output",				required_argument,	NULL,	_O_OUTPUT},
+	{"output-json",			no_argument,		NULL,	_O_OUTPUT_JSON},
+	{"count",				required_argument,	NULL,	_O_COUNT},
+	{"interval",			required_argument,	NULL,	_O_INTERVAL},
+
+	{"log-level",			required_argument,	NULL,	_O_LOG_LEVEL},
+	{"perf",				no_argument,		NULL,	_O_PERF},
+	{"verbose",				no_argument,		NULL,	_O_VERBOSE},
+	{"debug",				no_argument,		NULL,	_O_DEBUG},
+	{"force-log-colors",	no_argument,		NULL,	_O_FORCE_LOG_COLORS},
+	{"no-log-colors",		no_argument,		NULL,	_O_NO_LOG_COLORS},
+
+	{"help",				no_argument,		NULL,	_O_HELP},
+	{"version",				no_argument,		NULL,	_O_VERSION},
+
+	{NULL, 0, NULL, 0},
+};
+
+
+volatile bool global_stop = false;
+
+
+typedef struct {
+	void *v_output;
+	void (*write)(void *v_output, const frame_s *frame);
+	void (*destroy)(void *v_output);
+} _output_context_s;
+
+
+static void _signal_handler(int signum);
+static void _install_signal_handlers(void);
+
+static int _dump_sink(
+	const char *sink_name, unsigned sink_timeout,
+	long long count, long double interval,
+	_output_context_s *ctx);
+
+static void _help(FILE *fp);
+
+
+int main(int argc, char *argv[]) {
+	LOGGING_INIT;
+	A_THREAD_RENAME("main");
+
+	char *sink_name = NULL;
+	unsigned sink_timeout = 1;
+	char *output_path = NULL;
+	bool output_json = false;
+	long long count = 0;
+	long double interval = 0;
+
+#	define OPT_SET(_dest, _value) { \
+			_dest = _value; \
+			break; \
+		}
+
+#	define OPT_NUMBER(_name, _dest, _min, _max, _base) { \
+			errno = 0; char *_end = NULL; long long _tmp = strtoll(optarg, &_end, _base); \
+			if (errno || *_end || _tmp < _min || _tmp > _max) { \
+				printf("Invalid value for '%s=%s': min=%lld, max=%lld\n", _name, optarg, (long long)_min, (long long)_max); \
+				return 1; \
+			} \
+			_dest = _tmp; \
+			break; \
+		}
+
+#	define OPT_LDOUBLE(_name, _dest, _min, _max) { \
+			errno = 0; char *_end = NULL; long double _tmp = strtold(optarg, &_end); \
+			if (errno || *_end || _tmp < _min || _tmp > _max) { \
+				printf("Invalid value for '%s=%s': min=%Lf, max=%Lf\n", _name, optarg, (long double)_min, (long double)_max); \
+				return 1; \
+			} \
+			_dest = _tmp; \
+			break; \
+		}
+
+	char short_opts[128];
+	build_short_options(_LONG_OPTS, short_opts, 128);
+
+	for (int ch; (ch = getopt_long(argc, argv, short_opts, _LONG_OPTS, NULL)) >= 0;) {
+		switch (ch) {
+			case _O_SINK:			OPT_SET(sink_name, optarg);
+			case _O_SINK_TIMEOUT:	OPT_NUMBER("--sink-timeout", sink_timeout, 1, 60, 0);
+			case _O_OUTPUT:			OPT_SET(output_path, optarg);
+			case _O_OUTPUT_JSON:	OPT_SET(output_json, true);
+			case _O_COUNT:			OPT_NUMBER("--count", count, 0, LLONG_MAX, 0);
+			case _O_INTERVAL:		OPT_LDOUBLE("--interval", interval, 0, 60);
+
+			case _O_LOG_LEVEL:			OPT_NUMBER("--log-level", us_log_level, LOG_LEVEL_INFO, LOG_LEVEL_DEBUG, 0);
+			case _O_PERF:				OPT_SET(us_log_level, LOG_LEVEL_PERF);
+			case _O_VERBOSE:			OPT_SET(us_log_level, LOG_LEVEL_VERBOSE);
+			case _O_DEBUG:				OPT_SET(us_log_level, LOG_LEVEL_DEBUG);
+			case _O_FORCE_LOG_COLORS:	OPT_SET(us_log_colored, true);
+			case _O_NO_LOG_COLORS:		OPT_SET(us_log_colored, false);
+
+			case _O_HELP:		_help(stdout); return 0;
+			case _O_VERSION:	puts(VERSION); return 0;
+
+			case 0:		break;
+			default:	return 1;
+		}
+	}
+
+#	undef OPT_LDOUBLE
+#	undef OPT_NUMBER
+#	undef OPT_SET
+
+	if (sink_name == NULL || sink_name[0] == '\0') {
+		puts("Missing option --sink. See --help for details.");
+		return 1;
+	}
+
+	_output_context_s ctx = {0};
+
+	if (output_path && output_path[0] != '\0') {
+		if ((ctx.v_output = (void *)output_file_init(output_path, output_json)) == NULL) {
+			return 1;
+		}
+		ctx.write = output_file_write;
+		ctx.destroy = output_file_destroy;
+	}
+
+	_install_signal_handlers();
+	int retval = abs(_dump_sink(sink_name, sink_timeout, count, interval, &ctx));
+	if (ctx.v_output && ctx.destroy) {
+		ctx.destroy(ctx.v_output);
+	}
+	return retval;
+}
+
+
+static void _signal_handler(int signum) {
+	switch (signum) {
+		case SIGTERM:	LOG_INFO_NOLOCK("===== Stopping by SIGTERM ====="); break;
+		case SIGINT:	LOG_INFO_NOLOCK("===== Stopping by SIGINT ====="); break;
+		case SIGPIPE:	LOG_INFO_NOLOCK("===== Stopping by SIGPIPE ====="); break;
+		default:		LOG_INFO_NOLOCK("===== Stopping by %d =====", signum); break;
+	}
+	global_stop = true;
+}
+
+static void _install_signal_handlers(void) {
+	struct sigaction sig_act = {0};
+
+	assert(!sigemptyset(&sig_act.sa_mask));
+	sig_act.sa_handler = _signal_handler;
+	assert(!sigaddset(&sig_act.sa_mask, SIGINT));
+	assert(!sigaddset(&sig_act.sa_mask, SIGTERM));
+	assert(!sigaddset(&sig_act.sa_mask, SIGPIPE));
+
+	LOG_DEBUG("Installing SIGINT handler ...");
+	assert(!sigaction(SIGINT, &sig_act, NULL));
+
+	LOG_DEBUG("Installing SIGTERM handler ...");
+	assert(!sigaction(SIGTERM, &sig_act, NULL));
+
+	LOG_DEBUG("Installing SIGTERM handler ...");
+	assert(!sigaction(SIGPIPE, &sig_act, NULL));
+}
+
+static int _dump_sink(
+	const char *sink_name, unsigned sink_timeout,
+	long long count, long double interval,
+	_output_context_s *ctx) {
+
+	if (count == 0) {
+		count = -1;
+	}
+
+	useconds_t interval_us = interval * 1000000;
+
+	frame_s *frame = frame_init();
+	memsink_s *sink = NULL;
+
+	if ((sink = memsink_init("input", sink_name, false, 0, false, 0, sink_timeout)) == NULL) {
+		goto error;
+	}
+
+	unsigned fps = 0;
+	unsigned fps_accum = 0;
+	long long fps_second = 0;
+
+	long double last_ts = 0;
+
+	while (!global_stop) {
+		int error = memsink_client_get(sink, frame);
+		if (error == 0) {
+			const long double now = get_now_monotonic();
+			const long long now_second = floor_ms(now);
+
+			char fourcc_str[8];
+			LOG_VERBOSE("Frame: size=%zu, res=%ux%u, fourcc=%s, stride=%u, online=%d, key=%d, latency=%.3Lf, diff=%.3Lf",
+				frame->used, frame->width, frame->height,
+				fourcc_to_string(frame->format, fourcc_str, 8),
+				frame->stride, frame->online, frame->key,
+				now - frame->grab_ts, (last_ts ? now - last_ts : 0));
+			last_ts = now;
+
+			LOG_DEBUG("       grab_ts=%.3Lf, encode_begin_ts=%.3Lf, encode_end_ts=%.3Lf",
+				frame->grab_ts, frame->encode_begin_ts, frame->encode_end_ts);
+
+			if (now_second != fps_second) {
+				fps = fps_accum;
+				fps_accum = 0;
+				fps_second = now_second;
+				LOG_PERF_FPS("A new second has come; captured_fps=%u", fps);
+			}
+			fps_accum += 1;
+
+			if (ctx->v_output) {
+				ctx->write(ctx->v_output, frame);
+			}
+
+			if (count >= 0) {
+				--count;
+				if (count <= 0) {
+					break;
+				}
+			}
+
+			if (interval_us > 0) {
+				usleep(interval_us);
+			}
+		} else if (error == -2) {
+			usleep(1000);
+		} else {
+			goto error;
+		}
+	}
+
+	int retval = 0;
+	goto ok;
+
+	error:
+		retval = -1;
+
+	ok:
+		if (sink) {
+			memsink_destroy(sink);
+		}
+		frame_destroy(frame);
+
+		LOG_INFO("Bye-bye");
+		return retval;
+}
+
+static void _help(FILE *fp) {
+#	define SAY(_msg, ...) fprintf(fp, _msg "\n", ##__VA_ARGS__)
+	SAY("\nuStreamer-dump - Dump uStreamer's memory sink to file");
+	SAY("═════════════════════════════════════════════════════");
+	SAY("Version: %s; license: GPLv3", VERSION);
+	SAY("Copyright (C) 2018-2022 Maxim Devaev <mdevaev@gmail.com>\n");
+	SAY("Example:");
+	SAY("════════");
+	SAY("    ustreamer-dump --sink test --output - \\");
+	SAY("        | ffmpeg -use_wallclock_as_timestamps 1 -i pipe: -c:v libx264 test.mp4\n");
+	SAY("Sink options:");
+	SAY("═════════════");
+	SAY("    -s|--sink <name>  ──────── Memory sink ID. No default.\n");
+	SAY("    -t|--sink-timeout <sec>  ─ Timeout for the upcoming frame. Default: 1.\n");
+	SAY("    -o|--output <filename> ─── Filename to dump output to. Use '-' for stdout. Default: just consume the sink.\n");
+	SAY("    -j|--output-json  ──────── Format output as JSON. Required option --output. Default: disabled.\n");
+	SAY("    -c|--count  <N>  ───────── Limit the number of frames. Default: 0 (infinite).\n");
+	SAY("    -i|--interval <sec>  ───── Delay between reading frames (float). Default: 0.\n");
+	SAY("Logging options:");
+	SAY("════════════════");
+	SAY("    --log-level <N>  ──── Verbosity level of messages from 0 (info) to 3 (debug).");
+	SAY("                          Enabling debugging messages can slow down the program.");
+	SAY("                          Available levels: 0 (info), 1 (performance), 2 (verbose), 3 (debug).");
+	SAY("                          Default: %d.\n", us_log_level);
+	SAY("    --perf  ───────────── Enable performance messages (same as --log-level=1). Default: disabled.\n");
+	SAY("    --verbose  ────────── Enable verbose messages and lower (same as --log-level=2). Default: disabled.\n");
+	SAY("    --debug  ──────────── Enable debug messages and lower (same as --log-level=3). Default: disabled.\n");
+	SAY("    --force-log-colors  ─ Force color logging. Default: colored if stderr is a TTY.\n");
+	SAY("    --no-log-colors  ──── Disable color logging. Default: ditto.\n");
+	SAY("Help options:");
+	SAY("═════════════");
+	SAY("    -h|--help  ─────── Print this text and exit.\n");
+	SAY("    -v|--version  ──── Print version and exit.\n");
+#	undef SAY
+}

src/encoder.c

@@ -1,181 +0,0 @@
-/*****************************************************************************
-#    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
-#                                                                            #
-#    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
-#                                                                            #
-#    This program is free software: you can redistribute it and/or modify    #
-#    it under the terms of the GNU General Public License as published by    #
-#    the Free Software Foundation, either version 3 of the License, or       #
-#    (at your option) any later version.                                     #
-#                                                                            #
-#    This program is distributed in the hope that it will be useful,         #
-#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
-#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
-#    GNU General Public License for more details.                            #
-#                                                                            #
-#    You should have received a copy of the GNU General Public License       #
-#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
-#                                                                            #
-*****************************************************************************/
-
-
-#include <strings.h>
-#include <assert.h>
-
-#include "tools.h"
-#include "logging.h"
-#include "device.h"
-#include "encoder.h"
-
-#include "jpeg/encoder.h"
-
-#ifdef OMX_ENCODER
-#	include "omx/encoder.h"
-#endif
-
-
-static const struct {
-	const char *name;
-	const enum encoder_type_t type;
-} _ENCODER_TYPES[] = {
-	{"CPU",	ENCODER_TYPE_CPU},
-#	ifdef OMX_ENCODER
-	{"OMX",	ENCODER_TYPE_OMX},
-#	endif
-};
-
-
-struct encoder_t *encoder_init() {
-	struct encoder_t *encoder;
-
-	A_CALLOC(encoder, 1);
-	encoder->type = ENCODER_TYPE_CPU;
-	encoder->quality = 80;
-	return encoder;
-}
-
-#pragma GCC diagnostic ignored "-Wunused-parameter"
-#pragma GCC diagnostic push
-void encoder_prepare(struct encoder_t *encoder, struct device_t *dev) {
-#pragma GCC diagnostic pop
-
-	assert(encoder->type != ENCODER_TYPE_UNKNOWN);
-
-	if (encoder->type != ENCODER_TYPE_CPU) {
-		LOG_DEBUG("Initializing encoder ...");
-	}
-
-	LOG_INFO("Using JPEG quality: %d%%", encoder->quality);
-
-#	ifdef OMX_ENCODER
-	if (encoder->type == ENCODER_TYPE_OMX) {
-		if (dev->n_workers > OMX_MAX_ENCODERS) {
-			LOG_INFO(
-				"OMX-based encoder can only work with %u worker threads; forced --workers=%u",
-				OMX_MAX_ENCODERS, OMX_MAX_ENCODERS
-			);
-			dev->n_workers = OMX_MAX_ENCODERS;
-		}
-		encoder->n_omxs = dev->n_workers;
-
-		A_CALLOC(encoder->omxs, encoder->n_omxs);
-		for (unsigned index = 0; index < encoder->n_omxs; ++index) {
-			if ((encoder->omxs[index] = omx_encoder_init()) == NULL) {
-				goto use_fallback;
-			}
-		}
-	}
-#	endif
-
-	return;
-
-#	pragma GCC diagnostic ignored "-Wunused-label"
-#	pragma GCC diagnostic push
-	use_fallback:
-		LOG_ERROR("Can't initialize selected encoder, using CPU instead it");
-		encoder->type = ENCODER_TYPE_CPU;
-#	pragma GCC diagnostic pop
-}
-
-void encoder_destroy(struct encoder_t *encoder) {
-#	ifdef OMX_ENCODER
-	if (encoder->omxs) {
-		for (unsigned index = 0; index < encoder->n_omxs; ++index) {
-			if (encoder->omxs[index]) {
-				omx_encoder_destroy(encoder->omxs[index]);
-			}
-		}
-		free(encoder->omxs);
-	}
-#	endif
-	free(encoder);
-}
-
-enum encoder_type_t encoder_parse_type(const char *const str) {
-	for (unsigned index = 0; index < sizeof(_ENCODER_TYPES) / sizeof(_ENCODER_TYPES[0]); ++index) {
-		if (!strcasecmp(str, _ENCODER_TYPES[index].name)) {
-			return _ENCODER_TYPES[index].type;
-		}
-	}
-	return ENCODER_TYPE_UNKNOWN;
-}
-
-#pragma GCC diagnostic ignored "-Wunused-parameter"
-#pragma GCC diagnostic push
-void encoder_prepare_live(struct encoder_t *encoder, struct device_t *dev) {
-	assert(encoder->type != ENCODER_TYPE_UNKNOWN);
-
-#pragma GCC diagnostic pop
-#	ifdef OMX_ENCODER
-	if (encoder->type == ENCODER_TYPE_OMX) {
-		for (unsigned index = 0; index < encoder->n_omxs; ++index) {
-			if (omx_encoder_prepare_live(encoder->omxs[index], dev, encoder->quality, encoder->omx_use_ijg) < 0) {
-				goto use_fallback;
-			}
-		}
-	}
-#	endif
-
-	return;
-
-#	pragma GCC diagnostic ignored "-Wunused-label"
-#	pragma GCC diagnostic push
-	use_fallback:
-		LOG_ERROR("Can't prepare selected encoder, falling back to CPU");
-		encoder->type = ENCODER_TYPE_CPU;
-#	pragma GCC diagnostic pop
-}
-
-#pragma GCC diagnostic ignored "-Wunused-label"
-#pragma GCC diagnostic push
-int encoder_compress_buffer(struct encoder_t *encoder, struct device_t *dev,
-	const unsigned worker_number, const unsigned buf_index) {
-#pragma GCC diagnostic pop
-
-	assert(encoder->type != ENCODER_TYPE_UNKNOWN);
-
-	dev->run->pictures[buf_index].encode_begin_time = get_now_monotonic();
-
-	if (encoder->type == ENCODER_TYPE_CPU) {
-		jpeg_encoder_compress_buffer(dev, buf_index, encoder->quality);
-	}
-#	ifdef OMX_ENCODER
-	else if (encoder->type == ENCODER_TYPE_OMX) {
-		if (omx_encoder_compress_buffer(encoder->omxs[worker_number], dev, buf_index) < 0) {
-			goto error;
-		}
-	}
-#	endif
-
-	dev->run->pictures[buf_index].encode_end_time = get_now_monotonic();
-
-	return 0;
-
-#	pragma GCC diagnostic ignored "-Wunused-label"
-#	pragma GCC diagnostic push
-	error:
-		LOG_INFO("HW compressing error, falling back to CPU");
-		encoder->type = ENCODER_TYPE_CPU;
-		return -1;
-#	pragma GCC diagnostic pop
-}

src/http.c

@@ -1,695 +0,0 @@
-/*****************************************************************************
-#    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
-#                                                                            #
-#    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
-#                                                                            #
-#    This program is free software: you can redistribute it and/or modify    #
-#    it under the terms of the GNU General Public License as published by    #
-#    the Free Software Foundation, either version 3 of the License, or       #
-#    (at your option) any later version.                                     #
-#                                                                            #
-#    This program is distributed in the hope that it will be useful,         #
-#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
-#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
-#    GNU General Public License for more details.                            #
-#                                                                            #
-#    You should have received a copy of the GNU General Public License       #
-#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
-#                                                                            #
-*****************************************************************************/
-
-
-#include <stdlib.h>
-#include <stdbool.h>
-#include <string.h>
-#include <strings.h>
-#include <assert.h>
-
-#include <event2/event.h>
-#include <event2/thread.h>
-#include <event2/http.h>
-#include <event2/buffer.h>
-#include <event2/bufferevent.h>
-#include <event2/keyvalq_struct.h>
-
-#include <uuid/uuid.h>
-
-#ifndef EVTHREAD_USE_PTHREADS_IMPLEMENTED
-#	error Required libevent-pthreads support
-#endif
-
-#include "tools.h"
-#include "logging.h"
-#include "stream.h"
-#include "http.h"
-
-#include "data/index_html.h"
-#include "data/blank_jpeg.h"
-
-
-static bool _http_get_param_true(struct evkeyvalq *params, const char *key);
-static char *_http_get_param_uri(struct evkeyvalq *params, const char *key);
-
-static void _http_callback_root(struct evhttp_request *request, void *arg);
-static void _http_callback_ping(struct evhttp_request *request, void *v_server);
-static void _http_callback_snapshot(struct evhttp_request *request, void *v_server);
-
-static void _http_callback_stream(struct evhttp_request *request, void *v_server);
-static void _http_callback_stream_write(struct bufferevent *buf_event, void *v_ctx);
-static void _http_callback_stream_error(struct bufferevent *buf_event, short what, void *v_ctx);
-
-static void _http_exposed_refresh(int fd, short event, void *v_server);
-static void _http_queue_send_stream(struct http_server_t *server, const bool stream_updated, const bool picture_updated);
-
-static bool _expose_new_picture(struct http_server_t *server);
-static bool _expose_blank_picture(struct http_server_t *server);
-
-
-struct http_server_t *http_server_init(struct stream_t *stream) {
-	struct http_server_runtime_t *run;
-	struct http_server_t *server;
-	struct exposed_t *exposed;
-
-	A_CALLOC(exposed, 1);
-
-	A_CALLOC(run, 1);
-	run->stream = stream;
-	run->exposed = exposed;
-	run->drop_same_frames_blank = 10;
-
-	A_CALLOC(server, 1);
-	server->host = "127.0.0.1";
-	server->port = 8080;
-	server->timeout = 10;
-	server->run = run;
-
-	_expose_blank_picture(server);
-
-	assert(!evthread_use_pthreads());
-	assert((run->base = event_base_new()));
-	assert((run->http = evhttp_new(run->base)));
-	evhttp_set_allowed_methods(run->http, EVHTTP_REQ_GET|EVHTTP_REQ_HEAD);
-
-	assert(!evhttp_set_cb(run->http, "/", _http_callback_root, NULL));
-	assert(!evhttp_set_cb(run->http, "/ping", _http_callback_ping, (void *)server));
-	assert(!evhttp_set_cb(run->http, "/snapshot", _http_callback_snapshot, (void *)server));
-	assert(!evhttp_set_cb(run->http, "/stream", _http_callback_stream, (void *)server));
-
-	return server;
-}
-
-void http_server_destroy(struct http_server_t *server) {
-	if (server->run->refresh) {
-		event_del(server->run->refresh);
-		event_free(server->run->refresh);
-	}
-
-	evhttp_free(server->run->http);
-	event_base_free(server->run->base);
-	libevent_global_shutdown();
-
-	free(server->run->exposed->picture.data);
-	free(server->run->exposed);
-	free(server->run);
-	free(server);
-}
-
-int http_server_listen(struct http_server_t *server) {
-	struct timeval refresh_interval;
-
-	refresh_interval.tv_sec = 0;
-	refresh_interval.tv_usec = 1000000 / (server->run->stream->dev->soft_fps * 2);
-	assert((server->run->refresh = event_new(server->run->base, -1, EV_PERSIST, _http_exposed_refresh, server)));
-	assert(!event_add(server->run->refresh, &refresh_interval));
-
-	server->run->drop_same_frames_blank = max_u(server->drop_same_frames, server->run->drop_same_frames_blank);
-
-	LOG_DEBUG("Binding HTTP to [%s]:%d ...", server->host, server->port);
-	evhttp_set_timeout(server->run->http, server->timeout);
-
-	if (evhttp_bind_socket(server->run->http, server->host, server->port) < 0) {
-		LOG_PERROR("Can't listen HTTP on [%s]:%d", server->host, server->port)
-		return -1;
-	}
-
-	LOG_INFO("Listening HTTP on [%s]:%d", server->host, server->port);
-	return 0;
-}
-
-void http_server_loop(struct http_server_t *server) {
-	LOG_INFO("Starting HTTP eventloop ...");
-	event_base_dispatch(server->run->base);
-	LOG_INFO("HTTP eventloop stopped");
-}
-
-void http_server_loop_break(struct http_server_t *server) {
-	event_base_loopbreak(server->run->base);
-}
-
-
-static bool _http_get_param_true(struct evkeyvalq *params, const char *key) {
-	const char *value_str;
-
-	if ((value_str = evhttp_find_header(params, key)) != NULL) {
-		if (!strcasecmp(value_str, "true") || !strcasecmp(value_str, "yes") || value_str[0] == '1') {
-			return true;
-		}
-	}
-	return false;
-}
-
-static char *_http_get_param_uri(struct evkeyvalq *params, const char *key) {
-	const char *value_str;
-
-	if ((value_str = evhttp_find_header(params, key)) != NULL) {
-		return evhttp_encode_uri(value_str);
-	}
-	return NULL;
-}
-
-#define ADD_HEADER(_key, _value) \
-	assert(!evhttp_add_header(evhttp_request_get_output_headers(request), _key, _value))
-
-#define PROCESS_HEAD_REQUEST { \
-		if (evhttp_request_get_command(request) == EVHTTP_REQ_HEAD) { \
-			evhttp_send_reply(request, HTTP_OK, "OK", NULL); \
-			return; \
-		} \
-	}
-
-static void _http_callback_root(struct evhttp_request *request, UNUSED void *arg) {
-	struct evbuffer *buf;
-
-	PROCESS_HEAD_REQUEST;
-
-	assert((buf = evbuffer_new()));
-	assert(evbuffer_add_printf(buf, HTML_INDEX_PAGE));
-	ADD_HEADER("Content-Type", "text/html");
-	evhttp_send_reply(request, HTTP_OK, "OK", buf);
-	evbuffer_free(buf);
-}
-
-static void _http_callback_ping(struct evhttp_request *request, void *v_server) {
-	struct http_server_t *server = (struct http_server_t *)v_server;
-	struct evbuffer *buf;
-
-	PROCESS_HEAD_REQUEST;
-
-	assert((buf = evbuffer_new()));
-	assert(evbuffer_add_printf(buf,
-		"{\"source\": {\"resolution\": {\"width\": %u, \"height\": %u},"
-		" \"online\": %s, \"quality\": %u, \"soft_fps\": %u, \"captured_fps\": %u},"
-		" \"stream\": {\"queued_fps\": %u,  \"clients\": %u, \"clients_stat\": {",
-		(server->fake_width ? server->fake_width : server->run->exposed->width),
-		(server->fake_height ? server->fake_height : server->run->exposed->height),
-		bool_to_string(server->run->exposed->online),
-		server->run->stream->encoder->quality,
-		server->run->stream->dev->soft_fps,
-		server->run->exposed->captured_fps,
-		server->run->exposed->queued_fps,
-		server->run->stream_clients_count
-	));
-	for (struct stream_client_t * client = server->run->stream_clients; client != NULL; client = client->next) {
-		assert(evbuffer_add_printf(buf,
-			"\"%s\": {\"fps\": %u, \"advance_headers\": %s, \"dual_final_frames\": %s}%s",
-			client->id,
-			client->fps,
-			bool_to_string(client->advance_headers),
-			bool_to_string(client->dual_final_frames),
-			(client->next ? ", " : "")
-		));
-	}
-	assert(evbuffer_add_printf(buf, "}}}"));
-
-	ADD_HEADER("Content-Type", "application/json");
-	evhttp_send_reply(request, HTTP_OK, "OK", buf);
-	evbuffer_free(buf);
-}
-
-static void _http_callback_snapshot(struct evhttp_request *request, void *v_server) {
-	struct http_server_t *server = (struct http_server_t *)v_server;
-	struct evbuffer *buf;
-	char header_buf[64];
-
-	PROCESS_HEAD_REQUEST;
-
-#	define EXPOSED(_next) server->run->exposed->_next
-
-	assert((buf = evbuffer_new()));
-	assert(!evbuffer_add(buf, (const void *)EXPOSED(picture.data), EXPOSED(picture.size)));
-
-	ADD_HEADER("Access-Control-Allow-Origin:", "*");
-	ADD_HEADER("Cache-Control", "no-store, no-cache, must-revalidate, pre-check=0, post-check=0, max-age=0");
-	ADD_HEADER("Pragma", "no-cache");
-	ADD_HEADER("Expires", "Mon, 3 Jan 2000 12:34:56 GMT");
-
-#	define ADD_TIME_HEADER(_key, _value) \
-		{ sprintf(header_buf, "%.06Lf", _value); ADD_HEADER(_key, header_buf); }
-
-#	define ADD_UNSIGNED_HEADER(_key, _value) \
-		{ sprintf(header_buf, "%u", _value); ADD_HEADER(_key, header_buf); }
-
-	ADD_TIME_HEADER("X-Timestamp", get_now_real());
-
-	ADD_HEADER("X-UStreamer-Online",					bool_to_string(EXPOSED(online)));
-	ADD_UNSIGNED_HEADER("X-UStreamer-Width",			EXPOSED(width));
-	ADD_UNSIGNED_HEADER("X-UStreamer-Height",			EXPOSED(height));
-	ADD_TIME_HEADER("X-UStreamer-Grab-Time",			EXPOSED(picture.grab_time));
-	ADD_TIME_HEADER("X-UStreamer-Encode-Begin-Time",	EXPOSED(picture.encode_begin_time));
-	ADD_TIME_HEADER("X-UStreamer-Encode-End-Time",		EXPOSED(picture.encode_end_time));
-	ADD_TIME_HEADER("X-UStreamer-Expose-Begin-Time",	EXPOSED(expose_begin_time));
-	ADD_TIME_HEADER("X-UStreamer-Expose-Cmp-Time",		EXPOSED(expose_cmp_time));
-	ADD_TIME_HEADER("X-UStreamer-Expose-End-Time",		EXPOSED(expose_end_time));
-	ADD_TIME_HEADER("X-UStreamer-Send-Time",			get_now_monotonic());
-
-#	undef ADD_UNSUGNED_HEADER
-#	undef ADD_TIME_HEADER
-
-	ADD_HEADER("Content-Type", "image/jpeg");
-
-	evhttp_send_reply(request, HTTP_OK, "OK", buf);
-	evbuffer_free(buf);
-
-#	undef EXPOSED
-}
-
-#undef ADD_HEADER
-
-static void _http_callback_stream(struct evhttp_request *request, void *v_server) {
-	// https://github.com/libevent/libevent/blob/29cc8386a2f7911eaa9336692a2c5544d8b4734f/http.c#L2814
-	// https://github.com/libevent/libevent/blob/29cc8386a2f7911eaa9336692a2c5544d8b4734f/http.c#L2789
-	// https://github.com/libevent/libevent/blob/29cc8386a2f7911eaa9336692a2c5544d8b4734f/http.c#L362
-	// https://github.com/libevent/libevent/blob/29cc8386a2f7911eaa9336692a2c5544d8b4734f/http.c#L791
-	// https://github.com/libevent/libevent/blob/29cc8386a2f7911eaa9336692a2c5544d8b4734f/http.c#L1458
-
-	struct http_server_t *server = (struct http_server_t *)v_server;
-	struct evhttp_connection *conn;
-	struct evkeyvalq params;
-	struct bufferevent *buf_event;
-	struct stream_client_t *client;
-	char *client_addr;
-	unsigned short client_port;
-	uuid_t uuid;
-
-	PROCESS_HEAD_REQUEST;
-
-	conn = evhttp_request_get_connection(request);
-	if (conn != NULL) {
-		A_CALLOC(client, 1);
-		client->server = server;
-		client->request = request;
-		client->need_initial = true;
-		client->need_first_frame = true;
-
-		evhttp_parse_query(evhttp_request_get_uri(request), &params);
-		client->key = _http_get_param_uri(&params, "key");
-		client->extra_headers = _http_get_param_true(&params, "extra_headers");
-		client->advance_headers = _http_get_param_true(&params, "advance_headers");
-		client->dual_final_frames = _http_get_param_true(&params, "dual_final_frames");
-		evhttp_clear_headers(&params);
-
-		uuid_generate(uuid);
-		uuid_unparse_lower(uuid, client->id);
-
-		if (server->run->stream_clients == NULL) {
-			server->run->stream_clients = client;
-		} else {
-			struct stream_client_t *last = server->run->stream_clients;
-
-			for (; last->next != NULL; last = last->next);
-			client->prev = last;
-			last->next = client;
-		}
-		server->run->stream_clients_count += 1;
-
-		evhttp_connection_get_peer(conn, &client_addr, &client_port);
-		LOG_INFO(
-			"HTTP: Registered the new stream client: [%s]:%u; id=%s;"
-			" advance_headers=%s; dual_final_frames=%s; clients now: %u",
-			client_addr,
-			client_port,
-			client->id,
-			bool_to_string(client->advance_headers),
-			bool_to_string(client->dual_final_frames),
-			server->run->stream_clients_count
-		);
-
-		buf_event = evhttp_connection_get_bufferevent(conn);
-		bufferevent_setcb(buf_event, NULL, NULL, _http_callback_stream_error, (void *)client);
-		bufferevent_enable(buf_event, EV_READ);
-	} else {
-		evhttp_request_free(request);
-	}
-}
-
-#undef PROCESS_HEAD_REQUEST
-
-static void _http_callback_stream_write(struct bufferevent *buf_event, void *v_client) {
-#	define BOUNDARY "boundarydonotcross"
-#	define RN "\r\n"
-
-	struct stream_client_t *client = (struct stream_client_t *)v_client;
-	struct evbuffer *buf;
-	long double now = get_now_monotonic();
-	long long now_second = floor_ms(now);
-
-	if (now_second != client->fps_accum_second) {
-		client->fps = client->fps_accum;
-		client->fps_accum = 0;
-		client->fps_accum_second = now_second;
-	}
-	client->fps_accum += 1;
-
-	assert((buf = evbuffer_new()));
-
-	// В хроме и его производных есть фундаментальный баг: он отрисовывает
-	// фрейм с задержкой на один, как только ему придут заголовки следующего.
-	// В сочетании с drop_same_frames это дает значительный лаг стрима
-	// при большом количестве дропов (на статичном изображении, где внезапно
-	// что-то изменилось.
-	//
-	// https://bugs.chromium.org/p/chromium/issues/detail?id=527446
-	//
-	// Включение advance_headers заставляет стример отсылать заголовки
-	// будущего фрейма сразу после данных текущего, чтобы триггернуть отрисовку.
-	// Естественным следствием этого является невозможность установки заголовка
-	// Content-Length, так как предсказывать будущее мы еще не научились.
-	// Его наличие не требуется RFC, однако никаких стандартов на MJPG over HTTP
-	// в природе не существует, и никто не может гарантировать, что отсутствие
-	// Content-Length не сломает вещание для каких-нибудь маргинальных браузеров.
-	//
-	// Кроме того, advance_headers форсит отключение заголовков X-UStreamer-*
-	// по тем же причинам, по которым у нас нет Content-Length.
-
-#	define ADD_ADVANCE_HEADERS \
-		{ assert(evbuffer_add_printf(buf, \
-		"Content-Type: image/jpeg" RN "X-Timestamp: %.06Lf" RN RN, get_now_real())); }
-
-	if (client->need_initial) {
-		assert(evbuffer_add_printf(buf,
-			"HTTP/1.0 200 OK" RN
-			"Access-Control-Allow-Origin: *" RN
-			"Cache-Control: no-store, no-cache, must-revalidate, pre-check=0, post-check=0, max-age=0" RN
-			"Pragma: no-cache" RN
-			"Expires: Mon, 3 Jan 2000 12:34:56 GMT" RN
-			"Set-Cookie: stream_client=%s/%s; path=/; max-age=30" RN
-			"Content-Type: multipart/x-mixed-replace;boundary=" BOUNDARY RN
-			RN
-			"--" BOUNDARY RN,
-			(client->key != NULL ? client->key : "0"),
-			client->id
-		));
-
-		if (client->advance_headers) {
-			ADD_ADVANCE_HEADERS;
-		}
-
-		assert(!bufferevent_write_buffer(buf_event, buf));
-		client->need_initial = false;
-	}
-
-#	define EXPOSED(_next) client->server->run->exposed->_next
-
-	if (!client->advance_headers) {
-		assert(evbuffer_add_printf(buf,
-			"Content-Type: image/jpeg" RN
-			"Content-Length: %lu" RN
-			"X-Timestamp: %.06Lf" RN
-			"%s",
-			EXPOSED(picture.size) * sizeof(*EXPOSED(picture.data)),
-			get_now_real(), (client->extra_headers ? "" : RN)
-		));
-		if (client->extra_headers) {
-			assert(evbuffer_add_printf(buf,
-				"X-UStreamer-Online: %s" RN
-				"X-UStreamer-Width: %u" RN
-				"X-UStreamer-Height: %u" RN
-				"X-UStreamer-Client-FPS: %u" RN
-				"X-UStreamer-Grab-Time: %.06Lf" RN
-				"X-UStreamer-Encode-Begin-Time: %.06Lf" RN
-				"X-UStreamer-Encode-End-Time: %.06Lf" RN
-				"X-UStreamer-Expose-Begin-Time: %.06Lf" RN
-				"X-UStreamer-Expose-Cmp-Time: %.06Lf" RN
-				"X-UStreamer-Expose-End-Time: %.06Lf" RN
-				"X-UStreamer-Send-Time: %.06Lf" RN
-				RN,
-				bool_to_string(EXPOSED(online)),
-				EXPOSED(width),
-				EXPOSED(height),
-				client->fps,
-				EXPOSED(picture.grab_time),
-				EXPOSED(picture.encode_begin_time),
-				EXPOSED(picture.encode_end_time),
-				EXPOSED(expose_begin_time),
-				EXPOSED(expose_cmp_time),
-				EXPOSED(expose_end_time),
-				now
-			));
-		}
-	}
-
-	assert(!evbuffer_add(buf,
-		(void *)EXPOSED(picture.data),
-		EXPOSED(picture.size) * sizeof(*EXPOSED(picture.data))
-	));
-	assert(evbuffer_add_printf(buf, RN "--" BOUNDARY RN));
-
-	if (client->advance_headers) {
-		ADD_ADVANCE_HEADERS;
-	}
-
-	assert(!bufferevent_write_buffer(buf_event, buf));
-	evbuffer_free(buf);
-
-	bufferevent_setcb(buf_event, NULL, NULL, _http_callback_stream_error, (void *)client);
-	bufferevent_enable(buf_event, EV_READ);
-
-#	undef EXPOSED
-#	undef ADD_ADVANCE_HEADERS
-#	undef RN
-#	undef BOUNDARY
-}
-
-static void _http_callback_stream_error(UNUSED struct bufferevent *buf_event, UNUSED short what, void *v_client) {
-	struct stream_client_t *client = (struct stream_client_t *)v_client;
-	struct evhttp_connection *conn;
-	char *client_addr = "???";
-	unsigned short client_port = 0;
-
-	client->server->run->stream_clients_count -= 1;
-
-	conn = evhttp_request_get_connection(client->request);
-	if (conn != NULL) {
-		evhttp_connection_get_peer(conn, &client_addr, &client_port);
-	}
-	LOG_INFO(
-		"HTTP: Disconnected the stream client: [%s]:%u; clients now: %u",
-		client_addr, client_port, client->server->run->stream_clients_count
-	);
-	if (conn != NULL) {
-		evhttp_connection_free(conn);
-	}
-
-	if (client->prev == NULL) {
-		client->server->run->stream_clients = client->next;
-	} else {
-		client->prev->next = client->next;
-	}
-	if (client->next != NULL) {
-		client->next->prev = client->prev;
-	}
-	free(client->key);
-	free(client);
-}
-
-static void _http_queue_send_stream(struct http_server_t *server, const bool stream_updated, const bool picture_updated) {
-	struct evhttp_connection *conn;
-	struct bufferevent *buf_event;
-	long long now;
-	bool queued = false;
-	static unsigned queued_fps_accum = 0;
-	static long long queued_fps_second = 0;
-
-	for (struct stream_client_t *client = server->run->stream_clients; client != NULL; client = client->next) {
-		conn = evhttp_request_get_connection(client->request);
-		if (conn != NULL) {
-			// Фикс для бага WebKit. При включенной опции дропа одинаковых фреймов,
-			// WebKit отрисовывает последний фрейм в серии с некоторой задержкой,
-			// и нужно послать два фрейма, чтобы серия была вовремя завершена.
-			// Это похоже на баг Blink (см. _http_callback_stream_write() и advance_headers),
-			// но фикс для него не лечит проблему вебкита. Такие дела.
-
-			bool dual_update = (
-				server->drop_same_frames
-				&& client->dual_final_frames
-				&& stream_updated
-				&& client->updated_prev
-				&& !picture_updated
-			);
-
-			if (dual_update || picture_updated || client->need_first_frame) {
-				buf_event = evhttp_connection_get_bufferevent(conn);
-				bufferevent_setcb(buf_event, NULL, _http_callback_stream_write, _http_callback_stream_error, (void *)client);
-				bufferevent_enable(buf_event, EV_READ|EV_WRITE);
-
-				client->need_first_frame = false;
-				client->updated_prev = (picture_updated || client->need_first_frame); // Игнорировать dual
-				queued = true;
-			} else if (stream_updated) { // Для dual
-				client->updated_prev = false;
-			}
-		}
-	}
-
-	if (queued) {
-		if ((now = floor_ms(get_now_monotonic())) != queued_fps_second) {
-			server->run->exposed->queued_fps = queued_fps_accum;
-			queued_fps_accum = 0;
-			queued_fps_second = now;
-		}
-		queued_fps_accum += 1;
-	}
-}
-
-static void _http_exposed_refresh(UNUSED int fd, UNUSED short what, void *v_server) {
-	struct http_server_t *server = (struct http_server_t *)v_server;
-	bool stream_updated = false;
-	bool picture_updated = false;
-
-#	define UNLOCK_STREAM \
-		{ server->run->stream->updated = false; A_PTHREAD_M_UNLOCK(&server->run->stream->mutex); }
-
-	if (server->run->stream->updated) {
-		LOG_DEBUG("Refreshing HTTP exposed ...");
-		A_PTHREAD_M_LOCK(&server->run->stream->mutex);
-		if (server->run->stream->picture.size > 0) { // If online
-			picture_updated = _expose_new_picture(server);
-			UNLOCK_STREAM;
-		} else {
-			UNLOCK_STREAM;
-			picture_updated = _expose_blank_picture(server);
-		}
-		stream_updated = true;
-	} else if (!server->run->exposed->online) {
-		LOG_DEBUG("Refreshing HTTP exposed (BLANK) ...");
-		picture_updated = _expose_blank_picture(server);
-		stream_updated = true;
-	}
-
-#	undef UNLOCK_STREAM
-
-	_http_queue_send_stream(server, stream_updated, picture_updated);
-}
-
-static bool _expose_new_picture(struct http_server_t *server) {
-#	define STREAM(_next) server->run->stream->_next
-#	define EXPOSED(_next) server->run->exposed->_next
-
-	assert(STREAM(picture.size) > 0);
-	EXPOSED(captured_fps) = STREAM(captured_fps);
-	EXPOSED(expose_begin_time) = get_now_monotonic();
-
-#	define MEM_STREAM_TO_EXPOSED \
-		EXPOSED(picture.data), STREAM(picture.data), \
-		STREAM(picture.size) * sizeof(*STREAM(picture.data))
-
-	if (server->drop_same_frames) {
-		if (
-			EXPOSED(online)
-			&& EXPOSED(dropped) < server->drop_same_frames
-			&& EXPOSED(picture.size) == STREAM(picture.size)
-			&& !memcmp(MEM_STREAM_TO_EXPOSED)
-		) {
-			EXPOSED(expose_cmp_time) = get_now_monotonic();
-			EXPOSED(expose_end_time) = EXPOSED(expose_cmp_time);
-			LOG_VERBOSE(
-				"HTTP: dropped same frame number %u; comparsion time = %.06Lf",
-				EXPOSED(dropped), EXPOSED(expose_cmp_time) - EXPOSED(expose_begin_time)
-			);
-			EXPOSED(dropped) += 1;
-			return false; // Not updated
-		} else {
-			EXPOSED(expose_cmp_time) = get_now_monotonic();
-			LOG_VERBOSE(
-				"HTTP: passed same frame check (frames are differ); comparsion time = %.06Lf",
-				EXPOSED(expose_cmp_time) - EXPOSED(expose_begin_time)
-			);
-		}
-	}
-
-	if (EXPOSED(picture.allocated) < STREAM(picture.allocated)) {
-		A_REALLOC(EXPOSED(picture.data), STREAM(picture.allocated));
-		EXPOSED(picture.allocated) = STREAM(picture.allocated);
-	}
-
-	memcpy(MEM_STREAM_TO_EXPOSED);
-
-#	undef MEM_STREAM_TO_EXPOSED
-
-	EXPOSED(picture.size) = STREAM(picture.size);
-
-	EXPOSED(picture.grab_time) = STREAM(picture.grab_time);
-	EXPOSED(picture.encode_begin_time) = STREAM(picture.encode_begin_time);
-	EXPOSED(picture.encode_end_time) = STREAM(picture.encode_end_time);
-
-	EXPOSED(width) = STREAM(width);
-	EXPOSED(height) = STREAM(height);
-	EXPOSED(online) = true;
-	EXPOSED(dropped) = 0;
-	EXPOSED(expose_cmp_time) = EXPOSED(expose_begin_time);
-	EXPOSED(expose_end_time) = get_now_monotonic();
-
-	LOG_VERBOSE(
-		"HTTP: exposed new frame; full exposition time =  %.06Lf",
-		 EXPOSED(expose_end_time) - EXPOSED(expose_begin_time)
-	);
-
-#	undef EXPOSED
-#	undef STREAM
-	return true; // Updated
-}
-
-static bool _expose_blank_picture(struct http_server_t *server) {
-#	define EXPOSED(_next) server->run->exposed->_next
-
-	EXPOSED(expose_begin_time) = get_now_monotonic();
-	EXPOSED(expose_cmp_time) = EXPOSED(expose_begin_time);
-
-	if (EXPOSED(online) || EXPOSED(picture.size) == 0) {
-		if (EXPOSED(picture.allocated) < BLANK_JPG_SIZE) {
-			A_REALLOC(EXPOSED(picture.data), BLANK_JPG_SIZE);
-			EXPOSED(picture.allocated) = BLANK_JPG_SIZE;
-		}
-
-		memcpy(
-			EXPOSED(picture.data), BLANK_JPG_DATA,
-			BLANK_JPG_SIZE * sizeof(*EXPOSED(picture.data))
-		);
-
-		EXPOSED(picture.size) = BLANK_JPG_SIZE;
-
-		EXPOSED(picture.grab_time) = 0;
-		EXPOSED(picture.encode_begin_time) = 0;
-		EXPOSED(picture.encode_end_time) = 0;
-
-		EXPOSED(width) = BLANK_JPG_WIDTH;
-		EXPOSED(height) = BLANK_JPG_HEIGHT;
-		EXPOSED(captured_fps) = 0;
-		EXPOSED(online) = false;
-		goto updated;
-	}
-
-	if (EXPOSED(dropped) < server->run->drop_same_frames_blank) {
-		LOG_PERF("HTTP: dropped same frame (BLANK) number %u", EXPOSED(dropped));
-		EXPOSED(dropped) += 1;
-		EXPOSED(expose_end_time) = get_now_monotonic();
-		return false; // Not updated
-	}
-
-	updated:
-		EXPOSED(dropped) = 0;
-		EXPOSED(expose_end_time) = get_now_monotonic();
-		return true; // Updated
-
-#	undef EXPOSED
-}

src/http.h

@@ -1,93 +0,0 @@
-/*****************************************************************************
-#    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
-#                                                                            #
-#    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
-#                                                                            #
-#    This program is free software: you can redistribute it and/or modify    #
-#    it under the terms of the GNU General Public License as published by    #
-#    the Free Software Foundation, either version 3 of the License, or       #
-#    (at your option) any later version.                                     #
-#                                                                            #
-#    This program is distributed in the hope that it will be useful,         #
-#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
-#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
-#    GNU General Public License for more details.                            #
-#                                                                            #
-#    You should have received a copy of the GNU General Public License       #
-#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
-#                                                                            #
-*****************************************************************************/
-
-
-#include <stdbool.h>
-
-#include <event2/event.h>
-#include <event2/http.h>
-
-#include "tools.h"
-#include "stream.h"
-
-
-struct stream_client_t {
-	struct http_server_t	*server;
-	struct evhttp_request	*request;
-
-	char					*key;
-	bool					extra_headers;
-	bool					advance_headers;
-	bool					dual_final_frames;
-
-	char					id[37]; // ex. "1b4e28ba-2fa1-11d2-883f-0016d3cca427" + "\0"
-	bool					need_initial;
-	bool					need_first_frame;
-	bool					updated_prev;
-	unsigned				fps;
-	unsigned				fps_accum;
-	long long				fps_accum_second;
-
-	struct stream_client_t	*prev;
-	struct stream_client_t	*next;
-};
-
-struct exposed_t {
-	struct picture_t	picture;
-	unsigned			width;
-	unsigned			height;
-	unsigned			captured_fps;
-	unsigned			queued_fps;
-	bool				online;
-	unsigned			dropped;
-	long double			expose_begin_time;
-	long double			expose_cmp_time;
-	long double			expose_end_time;
-};
-
-struct http_server_runtime_t {
-	struct event_base		*base;
-	struct evhttp			*http;
-	struct event			*refresh;
-	struct stream_t			*stream;
-	struct exposed_t		*exposed;
-	struct stream_client_t	*stream_clients;
-	unsigned				stream_clients_count;
-	unsigned				drop_same_frames_blank;
-};
-
-struct http_server_t {
-	char		*host;
-	unsigned	port;
-	unsigned	drop_same_frames;
-	unsigned	fake_width;
-	unsigned	fake_height;
-	unsigned	timeout;
-
-	struct http_server_runtime_t *run;
-};
-
-
-struct http_server_t *http_server_init(struct stream_t *stream);
-void http_server_destroy(struct http_server_t *server);
-
-int http_server_listen(struct http_server_t *server);
-void http_server_loop(struct http_server_t *server);
-void http_server_loop_break(struct http_server_t *server);

src/jpeg/encoder.c

@@ -1,264 +0,0 @@
-/*****************************************************************************
-#    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
-#                                                                            #
-#    This source file based on code of MJPG-Streamer.                        #
-#                                                                            #
-#    Copyright (C) 2005-2006  Laurent Pinchart & Michel Xhaard               #
-#    Copyright (C) 2006  Gabriel A. Devenyi                                  #
-#    Copyright (C) 2007  Tom Stöveken                                        #
-#    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
-#                                                                            #
-#    This program is free software: you can redistribute it and/or modify    #
-#    it under the terms of the GNU General Public License as published by    #
-#    the Free Software Foundation, either version 3 of the License, or       #
-#    (at your option) any later version.                                     #
-#                                                                            #
-#    This program is distributed in the hope that it will be useful,         #
-#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
-#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
-#    GNU General Public License for more details.                            #
-#                                                                            #
-#    You should have received a copy of the GNU General Public License       #
-#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
-#                                                                            #
-*****************************************************************************/
-
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <assert.h>
-
-#include <jpeglib.h>
-#include <linux/videodev2.h>
-
-#include "../tools.h"
-#include "../device.h"
-
-#include "encoder.h"
-
-
-struct _mjpg_destination_mgr {
-	struct			jpeg_destination_mgr mgr; // Default manager
-	JOCTET			*buffer; // Start of buffer
-	unsigned char	*outbuffer_cursor;
-	unsigned long	*written;
-};
-
-
-static void _jpeg_set_dest_picture(j_compress_ptr jpeg, unsigned char *picture, unsigned long *written);
-
-static void _jpeg_write_scanlines_yuyv(struct jpeg_compress_struct *jpeg,
-    unsigned char *line_buffer, const unsigned char *data,
-    const unsigned width, const unsigned height);
-
-static void _jpeg_write_scanlines_uyvy(struct jpeg_compress_struct *jpeg,
-	unsigned char *line_buffer, const unsigned char *data,
-	const unsigned width, const unsigned height);
-
-static void _jpeg_write_scanlines_rgb565(struct jpeg_compress_struct *jpeg,
-	unsigned char *line_buffer, const unsigned char *data,
-	const unsigned width, const unsigned height);
-
-static void _jpeg_init_destination(j_compress_ptr jpeg);
-static boolean _jpeg_empty_output_buffer(j_compress_ptr jpeg);
-static void _jpeg_term_destination(j_compress_ptr jpeg);
-
-
-void jpeg_encoder_compress_buffer(struct device_t *dev, const unsigned index, const unsigned quality) {
-	// This function based on compress_image_to_jpeg() from mjpg-streamer
-
-	struct jpeg_compress_struct jpeg;
-	struct jpeg_error_mgr jpeg_error;
-	unsigned char *line_buffer;
-
-	A_CALLOC(line_buffer, dev->run->width * 3);
-
-	jpeg.err = jpeg_std_error(&jpeg_error);
-	jpeg_create_compress(&jpeg);
-
-	dev->run->pictures[index].size = 0;
-	_jpeg_set_dest_picture(&jpeg, dev->run->pictures[index].data, &dev->run->pictures[index].size);
-
-	jpeg.image_width = dev->run->width;
-	jpeg.image_height = dev->run->height;
-	jpeg.input_components = 3;
-	jpeg.in_color_space = JCS_RGB;
-
-	jpeg_set_defaults(&jpeg);
-	jpeg_set_quality(&jpeg, quality, TRUE);
-
-	jpeg_start_compress(&jpeg, TRUE);
-
-#	define WRITE_SCANLINES(_func) \
-		_func(&jpeg, line_buffer, dev->run->hw_buffers[index].start, dev->run->width, dev->run->height)
-	switch (dev->run->format) {
-		// https://www.fourcc.org/yuv.php
-		case V4L2_PIX_FMT_YUYV: WRITE_SCANLINES(_jpeg_write_scanlines_yuyv); break;
-		case V4L2_PIX_FMT_UYVY: WRITE_SCANLINES(_jpeg_write_scanlines_uyvy); break;
-		case V4L2_PIX_FMT_RGB565: WRITE_SCANLINES(_jpeg_write_scanlines_rgb565); break;
-		default: assert(0 && "Unsupported input format for JPEG compressor");
-	}
-#	undef WRITE_SCANLINES
-
-	// TODO: process jpeg errors:
-	// https://stackoverflow.com/questions/19857766/error-handling-in-libjpeg
-	jpeg_finish_compress(&jpeg);
-	jpeg_destroy_compress(&jpeg);
-	free(line_buffer);
-	assert(dev->run->pictures[index].size > 0);
-	assert(dev->run->pictures[index].size <= dev->run->max_picture_size);
-}
-
-static void _jpeg_set_dest_picture(j_compress_ptr jpeg, unsigned char *picture, unsigned long *written) {
-	struct _mjpg_destination_mgr *dest;
-
-	if (jpeg->dest == NULL) {
-		assert((jpeg->dest = (struct jpeg_destination_mgr *)(*jpeg->mem->alloc_small)(
-			(j_common_ptr) jpeg, JPOOL_PERMANENT, sizeof(struct _mjpg_destination_mgr)
-		)));
-	}
-
-	dest = (struct _mjpg_destination_mgr *) jpeg->dest;
-	dest->mgr.init_destination = _jpeg_init_destination;
-	dest->mgr.empty_output_buffer = _jpeg_empty_output_buffer;
-	dest->mgr.term_destination = _jpeg_term_destination;
-	dest->outbuffer_cursor = picture;
-	dest->written = written;
-}
-
-static void _jpeg_write_scanlines_yuyv(struct jpeg_compress_struct *jpeg,
-	unsigned char *line_buffer, const unsigned char *data,
-	const unsigned width, const unsigned height) {
-
-	JSAMPROW scanlines[1];
-	unsigned z = 0;
-
-	while (jpeg->next_scanline < height) {
-		unsigned char *ptr = line_buffer;
-
-		for (unsigned x = 0; x < width; ++x) {
-			int y = (!z ? data[0] << 8 : data[2] << 8);
-			int u = data[1] - 128;
-			int v = data[3] - 128;
-
-			int r = (y + (359 * v)) >> 8;
-			int g = (y - (88 * u) - (183 * v)) >> 8;
-			int b = (y + (454 * u)) >> 8;
-
-			*(ptr++) = (r > 255) ? 255 : ((r < 0) ? 0 : r);
-			*(ptr++) = (g > 255) ? 255 : ((g < 0) ? 0 : g);
-			*(ptr++) = (b > 255) ? 255 : ((b < 0) ? 0 : b);
-
-			if (z++) {
-				z = 0;
-				data += 4;
-			}
-		}
-
-		scanlines[0] = line_buffer;
-		jpeg_write_scanlines(jpeg, scanlines, 1);
-	}
-}
-
-static void _jpeg_write_scanlines_uyvy(struct jpeg_compress_struct *jpeg,
-	unsigned char *line_buffer, const unsigned char *data,
-	const unsigned width, const unsigned height) {
-
-	JSAMPROW scanlines[1];
-	unsigned z = 0;
-
-	while(jpeg->next_scanline < height) {
-		unsigned char *ptr = line_buffer;
-
-		for(unsigned x = 0; x < width; ++x) {
-			int y = (!z ? data[1] << 8 : data[3] << 8);
-			int u = data[0] - 128;
-			int v = data[2] - 128;
-
-			int r = (y + (359 * v)) >> 8;
-			int g = (y - (88 * u) - (183 * v)) >> 8;
-			int b = (y + (454 * u)) >> 8;
-
-			*(ptr++) = (r > 255) ? 255 : ((r < 0) ? 0 : r);
-			*(ptr++) = (g > 255) ? 255 : ((g < 0) ? 0 : g);
-			*(ptr++) = (b > 255) ? 255 : ((b < 0) ? 0 : b);
-
-			if (z++) {
-				z = 0;
-				data += 4;
-			}
-		}
-
-		scanlines[0] = line_buffer;
-		jpeg_write_scanlines(jpeg, scanlines, 1);
-	}
-}
-
-static void _jpeg_write_scanlines_rgb565(struct jpeg_compress_struct *jpeg,
-	unsigned char *line_buffer, const unsigned char *data,
-	const unsigned width, const unsigned height) {
-
-	JSAMPROW scanlines[1];
-
-	while(jpeg->next_scanline < height) {
-		unsigned char *ptr = line_buffer;
-
-		for(unsigned x = 0; x < width; ++x) {
-			unsigned int two_byte = (data[1] << 8) + data[0];
-
-			*(ptr++) = data[1] & 248;
-			*(ptr++) = (unsigned char)((two_byte & 2016) >> 3);
-			*(ptr++) = (data[0] & 31) * 8;
-
-			data += 2;
-		}
-
-		scanlines[0] = line_buffer;
-		jpeg_write_scanlines(jpeg, scanlines, 1);
-	}
-}
-
-#define JPEG_OUTPUT_BUFFER_SIZE  4096
-
-static void _jpeg_init_destination(j_compress_ptr jpeg) {
-	struct _mjpg_destination_mgr *dest = (struct _mjpg_destination_mgr *) jpeg->dest;
-
-	// Allocate the output buffer - it will be released when done with image
-	assert((dest->buffer = (JOCTET *)(*jpeg->mem->alloc_small)(
-		(j_common_ptr) jpeg, JPOOL_IMAGE, JPEG_OUTPUT_BUFFER_SIZE * sizeof(JOCTET)
-	)));
-
-	dest->mgr.next_output_byte = dest->buffer;
-	dest->mgr.free_in_buffer = JPEG_OUTPUT_BUFFER_SIZE;
-}
-
-static boolean _jpeg_empty_output_buffer(j_compress_ptr jpeg) {
-	// Called whenever local jpeg buffer fills up
-
-	struct _mjpg_destination_mgr *dest = (struct _mjpg_destination_mgr *) jpeg->dest;
-
-	memcpy(dest->outbuffer_cursor, dest->buffer, JPEG_OUTPUT_BUFFER_SIZE);
-	dest->outbuffer_cursor += JPEG_OUTPUT_BUFFER_SIZE;
-	*dest->written += JPEG_OUTPUT_BUFFER_SIZE;
-
-	dest->mgr.next_output_byte = dest->buffer;
-	dest->mgr.free_in_buffer = JPEG_OUTPUT_BUFFER_SIZE;
-
-	return TRUE;
-}
-
-static void _jpeg_term_destination(j_compress_ptr jpeg) {
-	// Called by jpeg_finish_compress after all data has been written.
-	// Usually needs to flush buffer
-
-	struct _mjpg_destination_mgr *dest = (struct _mjpg_destination_mgr *) jpeg->dest;
-	size_t data_count = JPEG_OUTPUT_BUFFER_SIZE - dest->mgr.free_in_buffer;
-
-	// Write any data remaining in the buffer
-	memcpy(dest->outbuffer_cursor, dest->buffer, data_count);
-	dest->outbuffer_cursor += data_count;
-	*dest->written += data_count;
-}
-
-#undef JPEG_OUTPUT_BUFFER_SIZE

src/libs/base64.c

@@ -0,0 +1,72 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#include "base64.h"
+
+
+static const char _ENCODING_TABLE[] = {
+	'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
+	'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
+	'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
+	'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
+	'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
+	'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
+	'w', 'x', 'y', 'z', '0', '1', '2', '3',
+	'4', '5', '6', '7', '8', '9', '+', '/',
+};
+
+static const unsigned _MOD_TABLE[] = {0, 2, 1};
+
+
+void base64_encode(const uint8_t *data, size_t size, char **encoded, size_t *allocated) {
+	const size_t encoded_size = 4 * ((size + 2) / 3) + 1; // +1 for '\0'
+
+	if (*encoded == NULL || (allocated && *allocated < encoded_size)) {
+		A_REALLOC(*encoded, encoded_size);
+		if (allocated) {
+			*allocated = encoded_size;
+		}
+	}
+
+	for (unsigned data_index = 0, encoded_index = 0; data_index < size;) {
+#		define OCTET(_name) unsigned _name = (data_index < size ? (uint8_t)data[data_index++] : 0)
+		OCTET(octet_a);
+		OCTET(octet_b);
+		OCTET(octet_c);
+#		undef OCTET
+
+		unsigned triple = (octet_a << 0x10) + (octet_b << 0x08) + octet_c;
+
+#		define ENCODE(_offset) (*encoded)[encoded_index++] = _ENCODING_TABLE[(triple >> _offset * 6) & 0x3F]
+		ENCODE(3);
+		ENCODE(2);
+		ENCODE(1);
+		ENCODE(0);
+#		undef ENCODE
+	}
+
+	for (unsigned index = 0; index < _MOD_TABLE[size % 3]; index++) {
+		(*encoded)[encoded_size - 2 - index] = '=';
+	}
+
+	(*encoded)[encoded_size - 1] = '\0';
+}

src/libs/base64.h

@@ -0,0 +1,34 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#pragma once
+
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+
+#include <sys/types.h>
+
+#include "tools.h"
+
+
+void base64_encode(const uint8_t *data, size_t size, char **encoded, size_t *allocated);

src/libs/config.h

@@ -0,0 +1,32 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#pragma once
+
+#define VERSION_MAJOR 5
+#define VERSION_MINOR 4
+
+#define MAKE_VERSION2(_major, _minor) #_major "." #_minor
+#define MAKE_VERSION1(_major, _minor) MAKE_VERSION2(_major, _minor)
+#define VERSION MAKE_VERSION1(VERSION_MAJOR, VERSION_MINOR)
+
+#define VERSION_U ((unsigned)(VERSION_MAJOR * 1000 + VERSION_MINOR))

src/libs/frame.c

@@ -0,0 +1,107 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#include "frame.h"
+
+
+frame_s *frame_init(void) {
+	frame_s *frame;
+	A_CALLOC(frame, 1);
+	frame_realloc_data(frame, 512 * 1024);
+	frame->dma_fd = -1;
+	return frame;
+}
+
+void frame_destroy(frame_s *frame) {
+	if (frame->data) {
+		free(frame->data);
+	}
+	free(frame);
+}
+
+void frame_realloc_data(frame_s *frame, size_t size) {
+	if (frame->allocated < size) {
+		A_REALLOC(frame->data, size);
+		frame->allocated = size;
+	}
+}
+
+void frame_set_data(frame_s *frame, const uint8_t *data, size_t size) {
+	frame_realloc_data(frame, size);
+	memcpy(frame->data, data, size);
+	frame->used = size;
+}
+
+void frame_append_data(frame_s *frame, const uint8_t *data, size_t size) {
+	size_t new_used = frame->used + size;
+	frame_realloc_data(frame, new_used);
+	memcpy(frame->data + frame->used, data, size);
+	frame->used = new_used;
+}
+
+void frame_copy(const frame_s *src, frame_s *dest) {
+	frame_set_data(dest, src->data, src->used);
+	FRAME_COPY_META(src, dest);
+}
+
+bool frame_compare(const frame_s *a, const frame_s *b) {
+	return (
+		a->allocated && b->allocated
+		&& FRAME_COMPARE_META_USED_NOTS(a, b)
+		&& !memcmp(a->data, b->data, b->used)
+	);
+}
+
+unsigned frame_get_padding(const frame_s *frame) {
+	unsigned bytes_per_pixel = 0;
+	switch (frame->format) {
+		case V4L2_PIX_FMT_YUYV:
+		case V4L2_PIX_FMT_UYVY:
+		case V4L2_PIX_FMT_RGB565: bytes_per_pixel = 2; break;
+		case V4L2_PIX_FMT_RGB24: bytes_per_pixel = 3; break;
+		// case V4L2_PIX_FMT_H264:
+		case V4L2_PIX_FMT_MJPEG:
+		case V4L2_PIX_FMT_JPEG: bytes_per_pixel = 0; break;
+		default: assert(0 && "Unknown format");
+	}
+	if (bytes_per_pixel > 0 && frame->stride > frame->width) {
+		return (frame->stride - frame->width * bytes_per_pixel);
+	}
+	return 0;
+}
+
+const char *fourcc_to_string(unsigned format, char *buf, size_t size) {
+	assert(size >= 8);
+	buf[0] = format & 0x7F;
+	buf[1] = (format >> 8) & 0x7F;
+	buf[2] = (format >> 16) & 0x7F;
+	buf[3] = (format >> 24) & 0x7F;
+	if (format & ((unsigned)1 << 31)) {
+		buf[4] = '-';
+		buf[5] = 'B';
+		buf[6] = 'E';
+		buf[7] = '\0';
+	} else {
+		buf[4] = '\0';
+	}
+	return buf;
+}

src/libs/frame.h

@@ -0,0 +1,118 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#pragma once
+
+#include <stddef.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+
+#include <linux/videodev2.h>
+
+#include "tools.h"
+
+
+typedef struct {
+	uint8_t	*data;
+	size_t	used;
+	size_t	allocated;
+	int		dma_fd;
+
+	unsigned width;
+	unsigned height;
+	unsigned format;
+	unsigned stride;
+	// Stride is a bytesperline in V4L2
+	// https://www.kernel.org/doc/html/v4.14/media/uapi/v4l/pixfmt-v4l2.html
+	// https://medium.com/@oleg.shipitko/what-does-stride-mean-in-image-processing-bba158a72bcd
+
+	bool online;
+	bool key;
+
+	long double	grab_ts;
+	long double	encode_begin_ts;
+	long double	encode_end_ts;
+} frame_s;
+
+
+#define FRAME_COPY_META(_src, _dest) { \
+		_dest->width = _src->width; \
+		_dest->height = _src->height; \
+		_dest->format = _src->format; \
+		_dest->stride = _src->stride; \
+		_dest->online = _src->online; \
+		_dest->key = _src->key; \
+		_dest->grab_ts = _src->grab_ts; \
+		_dest->encode_begin_ts = _src->encode_begin_ts; \
+		_dest->encode_end_ts = _src->encode_end_ts; \
+	}
+
+static inline void frame_copy_meta(const frame_s *src, frame_s *dest) {
+	FRAME_COPY_META(src, dest);
+}
+
+#define FRAME_COMPARE_META_USED_NOTS(_a, _b) ( \
+		_a->used == _b->used \
+		&& _a->width == _b->width \
+		&& _a->height == _b->height \
+		&& _a->format == _b->format \
+		&& _a->stride == _b->stride \
+		&& _a->online == _b->online \
+		&& _a->key == _b->key \
+	)
+
+
+static inline void frame_encoding_begin(const frame_s *src, frame_s *dest, unsigned format) {
+	assert(src->used > 0);
+	frame_copy_meta(src, dest);
+	dest->encode_begin_ts = get_now_monotonic();
+	dest->format = format;
+	dest->stride = 0;
+	dest->used = 0;
+}
+
+static inline void frame_encoding_end(frame_s *dest) {
+	assert(dest->used > 0);
+	dest->encode_end_ts = get_now_monotonic();
+}
+
+
+frame_s *frame_init(void);
+void frame_destroy(frame_s *frame);
+
+void frame_realloc_data(frame_s *frame, size_t size);
+void frame_set_data(frame_s *frame, const uint8_t *data, size_t size);
+void frame_append_data(frame_s *frame, const uint8_t *data, size_t size);
+
+void frame_copy(const frame_s *src, frame_s *dest);
+bool frame_compare(const frame_s *a, const frame_s *b);
+
+unsigned frame_get_padding(const frame_s *frame);
+
+const char *fourcc_to_string(unsigned format, char *buf, size_t size);
+
+static inline bool is_jpeg(unsigned format) {
+	return (format == V4L2_PIX_FMT_JPEG || format == V4L2_PIX_FMT_MJPEG);
+}

src/libs/list.h

@@ -0,0 +1,71 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#pragma once
+
+#include <assert.h>
+
+
+#define LIST_STRUCT(...) \
+	__VA_ARGS__ *prev; \
+	__VA_ARGS__ *next;
+
+#define LIST_ITERATE(_first, _item, ...) { \
+		for (__typeof__(_first) _item = _first; _item;) { \
+			__typeof__(_first) _next = _item->next; \
+			__VA_ARGS__ \
+			_item = _next; \
+		} \
+	}
+
+#define LIST_APPEND(_first, _item) { \
+		if (_first == NULL) { \
+			_first = _item; \
+		} else { \
+			__typeof__(_first) _last = _first; \
+			for (; _last->next; _last = _last->next); \
+			_item->prev = _last; \
+			_last->next = _item; \
+		} \
+	}
+
+#define LIST_APPEND_C(_first, _item, _count) { \
+		LIST_APPEND(_first, _item); \
+		++(_count); \
+	}
+
+#define LIST_REMOVE(_first, _item) { \
+		if (_item->prev == NULL) { \
+			_first = _item->next; \
+		} else { \
+			_item->prev->next = _item->next; \
+		} \
+		if (_item->next != NULL) { \
+			_item->next->prev = _item->prev; \
+		} \
+	}
+
+#define LIST_REMOVE_C(_first, _item, _count) { \
+		LIST_REMOVE(_first, _item); \
+		assert((_count) >= 1); \
+		--(_count); \
+	}

src/libs/logging.c

@@ -1,7 +1,8 @@
 /*****************************************************************************
-#    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
 #                                                                            #
-#    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
 #                                                                            #
 #    This program is free software: you can redistribute it and/or modify    #
 #    it under the terms of the GNU General Public License as published by    #
@@ -19,6 +20,11 @@
 *****************************************************************************/
 
 
-#pragma once
+#include "logging.h"
 
-#define VERSION "0.36"
+
+enum log_level_t us_log_level;
+
+bool us_log_colored;
+
+pthread_mutex_t us_log_mutex;

src/libs/logging.h

@@ -0,0 +1,162 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#pragma once
+
+#include <stdio.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <time.h>
+#include <assert.h>
+
+#include <pthread.h>
+
+#include "tools.h"
+#include "threading.h"
+
+
+enum log_level_t {
+    LOG_LEVEL_INFO,
+    LOG_LEVEL_PERF,
+    LOG_LEVEL_VERBOSE,
+    LOG_LEVEL_DEBUG,
+};
+
+
+extern enum log_level_t us_log_level;
+
+extern bool us_log_colored;
+
+extern pthread_mutex_t us_log_mutex;
+
+
+#define LOGGING_INIT { \
+		us_log_level = LOG_LEVEL_INFO; \
+		us_log_colored = isatty(2); \
+		A_MUTEX_INIT(&us_log_mutex); \
+	}
+
+#define LOGGING_DESTROY A_MUTEX_DESTROY(&us_log_mutex)
+
+#define LOGGING_LOCK	A_MUTEX_LOCK(&us_log_mutex)
+#define LOGGING_UNLOCK	A_MUTEX_UNLOCK(&us_log_mutex)
+
+
+#define COLOR_GRAY		"\x1b[30;1m"
+#define COLOR_RED		"\x1b[31;1m"
+#define COLOR_GREEN		"\x1b[32;1m"
+#define COLOR_YELLOW	"\x1b[33;1m"
+#define COLOR_BLUE		"\x1b[34;1m"
+#define COLOR_CYAN		"\x1b[36;1m"
+#define COLOR_RESET		"\x1b[0m"
+
+
+#define SEP_INFO(_ch) { \
+		LOGGING_LOCK; \
+		for (int _i = 0; _i < 80; ++_i) { \
+			fputc(_ch, stderr); \
+		} \
+		fputc('\n', stderr); \
+		fflush(stderr); \
+		LOGGING_UNLOCK; \
+	}
+
+#define SEP_DEBUG(_ch) { \
+		if (us_log_level >= LOG_LEVEL_DEBUG) { \
+			SEP_INFO(_ch); \
+		} \
+	}
+
+
+#define LOG_PRINTF_NOLOCK(_label_color, _label, _msg_color, _msg, ...) { \
+		char _tname_buf[MAX_THREAD_NAME] = {0}; \
+		thread_get_name(_tname_buf); \
+		if (us_log_colored) { \
+			fprintf(stderr, COLOR_GRAY "-- " _label_color _label COLOR_GRAY \
+				" [%.03Lf %9s]" " -- " COLOR_RESET _msg_color _msg COLOR_RESET, \
+				get_now_monotonic(), _tname_buf, ##__VA_ARGS__); \
+		} else { \
+			fprintf(stderr, "-- " _label " [%.03Lf %9s] -- " _msg, \
+				get_now_monotonic(), _tname_buf, ##__VA_ARGS__); \
+		} \
+		fputc('\n', stderr); \
+		fflush(stderr); \
+	}
+
+#define LOG_PRINTF(_label_color, _label, _msg_color, _msg, ...) { \
+		LOGGING_LOCK; \
+		LOG_PRINTF_NOLOCK(_label_color, _label, _msg_color, _msg, ##__VA_ARGS__); \
+		LOGGING_UNLOCK; \
+	}
+
+#define LOG_ERROR(_msg, ...) { \
+		LOG_PRINTF(COLOR_RED, "ERROR", COLOR_RED, _msg, ##__VA_ARGS__); \
+	}
+
+#define LOG_PERROR(_msg, ...) { \
+		char _perror_buf[1024] = {0}; \
+		char *_perror_ptr = errno_to_string(errno, _perror_buf, 1024); \
+		LOG_ERROR(_msg ": %s", ##__VA_ARGS__, _perror_ptr); \
+	}
+
+#define LOG_INFO(_msg, ...) { \
+		LOG_PRINTF(COLOR_GREEN, "INFO ", "", _msg, ##__VA_ARGS__); \
+	}
+
+#define LOG_INFO_NOLOCK(_msg, ...) { \
+		LOG_PRINTF_NOLOCK(COLOR_GREEN, "INFO ", "", _msg, ##__VA_ARGS__); \
+	}
+
+#define LOG_PERF(_msg, ...) { \
+		if (us_log_level >= LOG_LEVEL_PERF) { \
+			LOG_PRINTF(COLOR_CYAN, "PERF ", COLOR_CYAN, _msg, ##__VA_ARGS__); \
+		} \
+	}
+
+#define LOG_PERF_FPS(_msg, ...) { \
+		if (us_log_level >= LOG_LEVEL_PERF) { \
+			LOG_PRINTF(COLOR_YELLOW, "PERF ", COLOR_YELLOW, _msg, ##__VA_ARGS__); \
+		} \
+	}
+
+#define LOG_VERBOSE(_msg, ...) { \
+		if (us_log_level >= LOG_LEVEL_VERBOSE) { \
+			LOG_PRINTF(COLOR_BLUE, "VERB ", COLOR_BLUE, _msg, ##__VA_ARGS__); \
+		} \
+	}
+
+#define LOG_VERBOSE_PERROR(_msg, ...) { \
+		if (us_log_level >= LOG_LEVEL_VERBOSE) { \
+			char _perror_buf[1024] = {0}; \
+			char *_perror_ptr = errno_to_string(errno, _perror_buf, 1023); \
+			LOG_PRINTF(COLOR_BLUE, "VERB ", COLOR_BLUE, _msg ": %s", ##__VA_ARGS__, _perror_ptr); \
+		} \
+	}
+
+#define LOG_DEBUG(_msg, ...) { \
+		if (us_log_level >= LOG_LEVEL_DEBUG) { \
+			LOG_PRINTF(COLOR_GRAY, "DEBUG", COLOR_GRAY, _msg, ##__VA_ARGS__); \
+		} \
+	}

src/libs/memsink.c

@@ -0,0 +1,197 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#include "memsink.h"
+
+
+memsink_s *memsink_init(
+	const char *name, const char *obj, bool server,
+	mode_t mode, bool rm, unsigned client_ttl, unsigned timeout) {
+
+	memsink_s *sink;
+	A_CALLOC(sink, 1);
+	sink->name = name;
+	sink->obj = obj;
+	sink->server = server;
+	sink->rm = rm;
+	sink->client_ttl = client_ttl;
+	sink->timeout = timeout;
+	sink->fd = -1;
+	sink->mem = MAP_FAILED;
+	atomic_init(&sink->has_clients, false);
+
+	LOG_INFO("Using %s-sink: %s", name, obj);
+
+	mode_t mask = umask(0);
+	sink->fd = shm_open(sink->obj, (server ? O_RDWR | O_CREAT : O_RDWR), mode);
+	umask(mask);
+	if (sink->fd == -1) {
+		umask(mask);
+		LOG_PERROR("%s-sink: Can't open shared memory", name);
+		goto error;
+	}
+
+	if (sink->server && ftruncate(sink->fd, sizeof(memsink_shared_s)) < 0) {
+		LOG_PERROR("%s-sink: Can't truncate shared memory", name);
+		goto error;
+	}
+
+	if ((sink->mem = memsink_shared_map(sink->fd)) == NULL) {
+		LOG_PERROR("%s-sink: Can't mmap shared memory", name);
+		goto error;
+	}
+
+	return sink;
+
+	error:
+		memsink_destroy(sink);
+		return NULL;
+}
+
+void memsink_destroy(memsink_s *sink) {
+	if (sink->mem != MAP_FAILED) {
+		if (memsink_shared_unmap(sink->mem) < 0) {
+			LOG_PERROR("%s-sink: Can't unmap shared memory", sink->name);
+		}
+	}
+	if (sink->fd >= 0) {
+		if (close(sink->fd) < 0) {
+			LOG_PERROR("%s-sink: Can't close shared memory fd", sink->name);
+		}
+		if (sink->rm && shm_unlink(sink->obj) < 0) {
+			if (errno != ENOENT) {
+				LOG_PERROR("%s-sink: Can't remove shared memory", sink->name);
+			}
+		}
+	}
+	free(sink);
+}
+
+bool memsink_server_check(memsink_s *sink, const frame_s *frame) {
+	// Return true (the need to write to memsink) on any of these conditions:
+	//   - EWOULDBLOCK - we have an active client;
+	//   - Incorrect magic or version - need to first write;
+	//   - We have some active clients by last_client_ts;
+	//   - Frame meta differs (like size, format, but not timestamp).
+
+	assert(sink->server);
+
+	if (flock(sink->fd, LOCK_EX | LOCK_NB) < 0) {
+		if (errno == EWOULDBLOCK) {
+			atomic_store(&sink->has_clients, true);
+			return true;
+		}
+		LOG_PERROR("%s-sink: Can't lock memory", sink->name);
+		return false;
+	}
+
+	if (sink->mem->magic != MEMSINK_MAGIC || sink->mem->version != MEMSINK_VERSION) {
+		return true;
+	}
+
+	bool has_clients = (sink->mem->last_client_ts + sink->client_ttl > get_now_monotonic());
+	atomic_store(&sink->has_clients, has_clients);
+
+	if (flock(sink->fd, LOCK_UN) < 0) {
+		LOG_PERROR("%s-sink: Can't unlock memory", sink->name);
+		return false;
+	}
+	return (has_clients || !FRAME_COMPARE_META_USED_NOTS(sink->mem, frame));;
+}
+
+int memsink_server_put(memsink_s *sink, const frame_s *frame) {
+	assert(sink->server);
+
+	const long double now = get_now_monotonic();
+
+	if (frame->used > MEMSINK_MAX_DATA) {
+		LOG_ERROR("%s-sink: Can't put frame: is too big (%zu > %zu)",
+			sink->name, frame->used, MEMSINK_MAX_DATA);
+		return 0; // -2
+	}
+
+	if (flock_timedwait_monotonic(sink->fd, 1) == 0) {
+		LOG_VERBOSE("%s-sink: >>>>> Exposing new frame ...", sink->name);
+
+		sink->last_id = get_now_id();
+		sink->mem->id = sink->last_id;
+
+		memcpy(sink->mem->data, frame->data, frame->used);
+		sink->mem->used = frame->used;
+		FRAME_COPY_META(frame, sink->mem);
+
+		sink->mem->magic = MEMSINK_MAGIC;
+		sink->mem->version = MEMSINK_VERSION;
+		atomic_store(&sink->has_clients, (sink->mem->last_client_ts + sink->client_ttl > get_now_monotonic()));
+
+		if (flock(sink->fd, LOCK_UN) < 0) {
+			LOG_PERROR("%s-sink: Can't unlock memory", sink->name);
+			return -1;
+		}
+		LOG_VERBOSE("%s-sink: Exposed new frame; full exposition time = %.3Lf",
+			sink->name, get_now_monotonic() - now);
+
+	} else if (errno == EWOULDBLOCK) {
+		LOG_VERBOSE("%s-sink: ===== Shared memory is busy now; frame skipped", sink->name);
+
+	} else {
+		LOG_PERROR("%s-sink: Can't lock memory", sink->name);
+		return -1;
+	}
+	return 0;
+}
+
+int memsink_client_get(memsink_s *sink, frame_s *frame) { // cppcheck-suppress unusedFunction
+	assert(!sink->server); // Client only
+
+	if (flock_timedwait_monotonic(sink->fd, sink->timeout) < 0) {
+		if (errno == EWOULDBLOCK) {
+			return -2;
+		}
+		LOG_PERROR("%s-sink: Can't lock memory", sink->name);
+		return -1;
+	}
+
+	int retval = -2; // Not updated
+	if (sink->mem->magic == MEMSINK_MAGIC) {
+		if (sink->mem->version != MEMSINK_VERSION) {
+			LOG_ERROR("%s-sink: Protocol version mismatch: sink=%u, required=%u",
+				sink->name, sink->mem->version, MEMSINK_VERSION);
+			retval = -1;
+			goto done;
+		}
+		if (sink->mem->id != sink->last_id) { // When updated
+			sink->last_id = sink->mem->id;
+			frame_set_data(frame, sink->mem->data, sink->mem->used);
+			FRAME_COPY_META(sink->mem, frame);
+			retval = 0;
+		}
+		sink->mem->last_client_ts = get_now_monotonic();
+	}
+
+	done:
+		if (flock(sink->fd, LOCK_UN) < 0) {
+			LOG_PERROR("%s-sink: Can't unlock memory", sink->name);
+			return -1;
+		}
+		return retval;
+}

src/libs/memsink.h

@@ -1,7 +1,8 @@
 /*****************************************************************************
-#    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
 #                                                                            #
-#    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
 #                                                                            #
 #    This program is free software: you can redistribute it and/or modify    #
 #    it under the terms of the GNU General Public License as published by    #
@@ -21,47 +22,47 @@
 
 #pragma once
 
+#include <stdint.h>
+#include <stdbool.h>
+#include <stdatomic.h>
+#include <string.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <assert.h>
+
+#include <sys/types.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+
 #include "tools.h"
-#include "device.h"
-
-#ifdef OMX_ENCODER
-#	include "omx/encoder.h"
-#	define ENCODER_TYPES_OMX_HINT ", OMX"
-#else
-#	define ENCODER_TYPES_OMX_HINT ""
-#endif
+#include "logging.h"
+#include "frame.h"
+#include "memsinksh.h"
 
 
-#define ENCODER_TYPES_STR \
-	"CPU" \
-	ENCODER_TYPES_OMX_HINT
+typedef struct {
+	const char	*name;
+	const char	*obj;
+	bool		server;
+	bool		rm;
+	unsigned	client_ttl; // Only for server
+	unsigned	timeout;
 
-enum encoder_type_t {
-	ENCODER_TYPE_UNKNOWN, // Only for encoder_parse_type() and main()
-	ENCODER_TYPE_CPU,
-#ifdef OMX_ENCODER
-	ENCODER_TYPE_OMX,
-#endif
-};
-
-struct encoder_t {
-	enum encoder_type_t		type;
-	unsigned				quality;
-#ifdef OMX_ENCODER
-	bool					omx_use_ijg;
-	unsigned				n_omxs;
-	struct omx_encoder_t	**omxs;
-#endif
-};
+	int					fd;
+	memsink_shared_s	*mem;
+	uint64_t			last_id;
+	atomic_bool			has_clients; // Only for server
+} memsink_s;
 
 
-struct encoder_t *encoder_init();
-void encoder_destroy(struct encoder_t *encoder);
+memsink_s *memsink_init(
+	const char *name, const char *obj, bool server,
+	mode_t mode, bool rm, unsigned client_ttl, unsigned timeout);
 
-enum encoder_type_t encoder_parse_type(const char *const str);
+void memsink_destroy(memsink_s *sink);
 
-void encoder_prepare(struct encoder_t *encoder, struct device_t *dev);
-void encoder_prepare_live(struct encoder_t *encoder, struct device_t *dev);
+bool memsink_server_check(memsink_s *sink, const frame_s *frame);
+int memsink_server_put(memsink_s *sink, const frame_s *frame);
 
-int encoder_compress_buffer(struct encoder_t *encoder, struct device_t *dev,
-	const unsigned worker_number, const unsigned buf_index);
+int memsink_client_get(memsink_s *sink, frame_s *frame);

src/libs/memsinksh.h

@@ -0,0 +1,84 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#include <sys/types.h>
+#include <sys/mman.h>
+
+
+#define MEMSINK_MAGIC	((uint64_t)0xCAFEBABECAFEBABE)
+#define MEMSINK_VERSION	((uint32_t)2)
+
+#ifndef CFG_MEMSINK_MAX_DATA
+#	define CFG_MEMSINK_MAX_DATA 33554432
+#endif
+#define MEMSINK_MAX_DATA ((size_t)(CFG_MEMSINK_MAX_DATA))
+
+
+typedef struct {
+	uint64_t	magic;
+	uint32_t	version;
+
+	uint64_t	id;
+
+	size_t		used;
+	unsigned	width;
+	unsigned	height;
+	unsigned	format;
+	unsigned	stride;
+	bool		online;
+	bool		key;
+
+	long double	grab_ts;
+	long double	encode_begin_ts;
+	long double	encode_end_ts;
+
+	long double	last_client_ts;
+
+	uint8_t		data[MEMSINK_MAX_DATA];
+} memsink_shared_s;
+
+
+INLINE memsink_shared_s *memsink_shared_map(int fd) {
+	memsink_shared_s *mem = mmap(
+		NULL,
+		sizeof(memsink_shared_s),
+		PROT_READ | PROT_WRITE,
+		MAP_SHARED,
+		fd,
+		0
+	);
+	if (mem == MAP_FAILED) {
+		return NULL;
+	}
+	assert(mem != NULL);
+	return mem;
+}
+
+INLINE int memsink_shared_unmap(memsink_shared_s *mem) {
+	assert(mem != NULL);
+	return munmap(mem, sizeof(memsink_shared_s));
+}

src/libs/options.c

@@ -0,0 +1,39 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#include "options.h"
+
+
+void build_short_options(const struct option opts[], char *short_opts, size_t size) {
+	memset(short_opts, 0, size);
+    for (unsigned short_index = 0, opt_index = 0; opts[opt_index].name != NULL; ++opt_index) {
+		assert(short_index < size - 3);
+        if (isalpha(opts[opt_index].val)) {
+            short_opts[short_index] = opts[opt_index].val;
+            ++short_index;
+            if (opts[opt_index].has_arg == required_argument) {
+                short_opts[short_index] = ':';
+                ++short_index;
+            }
+        }
+    }
+}

src/libs/options.h

@@ -0,0 +1,33 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#pragma once
+
+#include <string.h>
+#include <ctype.h>
+#include <getopt.h>
+#include <assert.h>
+
+#include <sys/types.h>
+
+
+void build_short_options(const struct option opts[], char *short_opts, size_t size);

src/libs/process.h

@@ -0,0 +1,147 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#pragma once
+
+#include <signal.h>
+#include <unistd.h>
+
+#include <sys/types.h>
+
+
+#if defined(__linux__)
+#	define HAS_PDEATHSIG
+#elif defined(__FreeBSD__)
+#	include <sys/param.h>
+#	if __FreeBSD_version >= 1102000
+#		define HAS_PDEATHSIG
+#	endif
+#endif
+
+
+#ifdef WITH_SETPROCTITLE
+#	include <stdlib.h>
+#	include <string.h>
+#	if defined(__linux__)
+#		include <bsd/unistd.h>
+#	elif (defined(__FreeBSD__) || defined(__DragonFly__))
+//#		include <unistd.h>
+//#		include <sys/types.h>
+#	elif (defined(__NetBSD__) || defined(__OpenBSD__)) // setproctitle() placed in stdlib.h
+#	else
+#		error setproctitle() not implemented, you can disable it using WITH_SETPROCTITLE=0
+#	endif
+#endif
+#ifdef HAS_PDEATHSIG
+#	if defined(__linux__)
+#		include <sys/prctl.h>
+#	elif defined(__FreeBSD__)
+#		include <sys/procctl.h>
+#	endif
+#endif
+#ifdef WITH_SETPROCTITLE
+#	include "tools.h"
+#endif
+#ifdef HAS_PDEATHSIG
+#	include "logging.h"
+#endif
+
+
+#ifdef WITH_SETPROCTITLE
+extern char **environ;
+#endif
+
+
+#ifdef HAS_PDEATHSIG
+INLINE int process_track_parent_death(void) {
+	pid_t parent = getppid();
+	int signum = SIGTERM;
+#	if defined(__linux__)
+	int retval = prctl(PR_SET_PDEATHSIG, signum);
+#	elif defined(__FreeBSD__)
+	int retval = procctl(P_PID, 0, PROC_PDEATHSIG_CTL, &signum);
+#	else
+#		error WTF?
+#	endif
+	if (retval < 0) {
+		LOG_PERROR("Can't set to receive SIGTERM on parent process death");
+		return -1;
+	}
+
+	if (kill(parent, 0) < 0) {
+		LOG_PERROR("The parent process %d is already dead", parent);
+		return -1;
+	}
+
+	return 0;
+}
+#endif
+
+#ifdef WITH_SETPROCTITLE
+#	pragma GCC diagnostic ignored "-Wunused-parameter"
+#	pragma GCC diagnostic push
+INLINE void process_set_name_prefix(int argc, char *argv[], const char *prefix) {
+#	pragma GCC diagnostic pop
+
+	char *cmdline = NULL;
+	size_t allocated = 2048;
+	size_t used = 0;
+
+	A_REALLOC(cmdline, allocated);
+	cmdline[0] = '\0';
+
+	for (int index = 0; index < argc; ++index) {
+		size_t arg_len = strlen(argv[index]);
+		if (used + arg_len + 16 >= allocated) {
+			allocated += arg_len + 2048;
+			A_REALLOC(cmdline, allocated); // cppcheck-suppress memleakOnRealloc // False-positive (ok with assert)
+		}
+
+		strcat(cmdline, " ");
+		strcat(cmdline, argv[index]);
+		used = strlen(cmdline); // Не считаем вручную, так надежнее
+	}
+
+#	ifdef __linux__
+	setproctitle_init(argc, argv, environ);
+#	endif
+	setproctitle("-%s:%s", prefix, cmdline);
+
+	free(cmdline);
+}
+#endif
+
+INLINE void process_notify_parent(void) {
+	pid_t parent = getppid();
+
+	if (kill(parent, SIGUSR2) < 0) {
+		LOG_PERROR("Can't send SIGUSR2 to the parent process %d", parent);
+	}
+}
+
+INLINE void process_suicide(void) {
+	pid_t pid = getpid();
+
+	if (kill(pid, SIGTERM) < 0) {
+		LOG_PERROR("Can't send SIGTERM to own pid %d", pid);
+	}
+}

src/libs/threading.h

@@ -0,0 +1,125 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#pragma once
+
+#include <stdio.h>
+#include <unistd.h>
+#include <assert.h>
+
+#include <sys/types.h>
+#include <sys/syscall.h>
+
+#include <pthread.h>
+#ifdef WITH_PTHREAD_NP
+#	if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
+#		include <pthread_np.h>
+#		include <sys/param.h>
+#	endif
+#endif
+
+#include "tools.h"
+
+
+#ifdef PTHREAD_MAX_NAMELEN_NP
+#	define MAX_THREAD_NAME ((size_t)(PTHREAD_MAX_NAMELEN_NP))
+#else
+#	define MAX_THREAD_NAME ((size_t)16)
+#endif
+
+#define A_THREAD_CREATE(_tid, _func, _arg)	assert(!pthread_create(_tid, NULL, _func, _arg))
+#define A_THREAD_JOIN(_tid)					assert(!pthread_join(_tid, NULL))
+
+#ifdef WITH_PTHREAD_NP
+#	define A_THREAD_RENAME(_fmt, ...) { \
+			char _new_tname_buf[MAX_THREAD_NAME] = {0}; \
+			assert(snprintf(_new_tname_buf, MAX_THREAD_NAME, _fmt, ##__VA_ARGS__) > 0); \
+			thread_set_name(_new_tname_buf); \
+		}
+#else
+#	define A_THREAD_RENAME(_fmt, ...)
+#endif
+
+#define A_MUTEX_INIT(_mutex)	assert(!pthread_mutex_init(_mutex, NULL))
+#define A_MUTEX_DESTROY(_mutex)	assert(!pthread_mutex_destroy(_mutex))
+#define A_MUTEX_LOCK(_mutex)	assert(!pthread_mutex_lock(_mutex))
+#define A_MUTEX_UNLOCK(_mutex)	assert(!pthread_mutex_unlock(_mutex))
+
+#define A_COND_INIT(_cond)		assert(!pthread_cond_init(_cond, NULL))
+#define A_COND_DESTROY(_cond)	assert(!pthread_cond_destroy(_cond))
+#define A_COND_SIGNAL(...)		assert(!pthread_cond_signal(__VA_ARGS__))
+#define A_COND_WAIT_TRUE(_var, _cond, _mutex) { while(!_var) assert(!pthread_cond_wait(_cond, _mutex)); }
+
+
+#ifdef WITH_PTHREAD_NP
+INLINE void thread_set_name(const char *name) {
+#	if defined(__linux__)
+	pthread_setname_np(pthread_self(), name);
+#	elif defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
+	pthread_set_name_np(pthread_self(), name);
+#	elif defined(__NetBSD__)
+	pthread_setname_np(pthread_self(), "%s", (void *)name);
+#	else
+#		error thread_set_name() not implemented, you can disable it using WITH_PTHREAD_NP=0
+#	endif
+}
+#endif
+
+INLINE void thread_get_name(char *name) { // Always required for logging
+#ifdef WITH_PTHREAD_NP
+	int retval = -1;
+#	if defined(__linux__) || defined (__NetBSD__)
+	retval = pthread_getname_np(pthread_self(), name, MAX_THREAD_NAME);
+#	elif \
+		(defined(__FreeBSD__) && defined(__FreeBSD_version) && __FreeBSD_version >= 1103500) \
+		|| (defined(__OpenBSD__) && defined(OpenBSD) && OpenBSD >= 201905) \
+		|| defined(__DragonFly__)
+	pthread_get_name_np(pthread_self(), name, MAX_THREAD_NAME);
+	if (name[0] != '\0') {
+		retval = 0;
+	}
+#	else
+#		error thread_get_name() not implemented, you can disable it using WITH_PTHREAD_NP=0
+#	endif
+	if (retval < 0) {
+#endif
+
+#if defined(__linux__)
+		pid_t tid = syscall(SYS_gettid);
+#elif defined(__FreeBSD__)
+		pid_t tid = syscall(SYS_thr_self);
+#elif defined(__OpenBSD__)
+		pid_t tid = syscall(SYS_getthrid);
+#elif defined(__NetBSD__)
+		pid_t tid = syscall(SYS__lwp_self);
+#elif defined(__DragonFly__)
+		pid_t tid = syscall(SYS_lwp_gettid);
+#else
+		pid_t tid = 0; // Makes cppcheck happy
+#	warning gettid() not implemented
+#endif
+		assert(snprintf(name, MAX_THREAD_NAME, "tid=%d", tid) > 0);
+
+#ifdef WITH_PTHREAD_NP
+	}
+#endif
+}

src/libs/tools.h

@@ -0,0 +1,176 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#pragma once
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <string.h>
+#include <unistd.h>
+#include <limits.h>
+#include <locale.h>
+#include <errno.h>
+#include <math.h>
+#include <time.h>
+#include <assert.h>
+
+#include <sys/file.h>
+
+
+#ifdef NDEBUG
+#	error WTF dude? Asserts are good things!
+#endif
+
+#if CHAR_BIT != 8
+#	error There are not 8 bits in a char!
+#endif
+
+
+#define RN "\r\n"
+
+#define INLINE inline __attribute__((always_inline))
+#define UNUSED __attribute__((unused))
+
+#define A_CALLOC(_dest, _nmemb)		assert((_dest = calloc(_nmemb, sizeof(*(_dest)))))
+#define A_REALLOC(_dest, _nmemb)	assert((_dest = realloc(_dest, _nmemb * sizeof(*(_dest)))))
+#define MEMSET_ZERO(_obj)			memset(&(_obj), 0, sizeof(_obj))
+
+#define A_ASPRINTF(_dest, _fmt, ...) assert(asprintf(&(_dest), _fmt, ##__VA_ARGS__) >= 0)
+
+#define ARRAY_LEN(_array) (sizeof(_array) / sizeof(_array[0]))
+
+
+INLINE const char *bool_to_string(bool flag) {
+	return (flag ? "true" : "false");
+}
+
+INLINE size_t align_size(size_t size, size_t to) {
+	return ((size + (to - 1)) & ~(to - 1));
+}
+
+INLINE unsigned min_u(unsigned a, unsigned b) {
+	return (a < b ? a : b);
+}
+
+INLINE unsigned max_u(unsigned a, unsigned b) {
+	return (a > b ? a : b);
+}
+
+INLINE long long floor_ms(long double now) {
+	return (long long)now - (now < (long long)now); // floor()
+}
+
+INLINE uint32_t triple_u32(uint32_t x) {
+	// https://nullprogram.com/blog/2018/07/31/
+	x ^= x >> 17;
+	x *= UINT32_C(0xED5AD4BB);
+	x ^= x >> 11;
+	x *= UINT32_C(0xAC4C1B51);
+	x ^= x >> 15;
+	x *= UINT32_C(0x31848BAB);
+	x ^= x >> 14;
+	return x;
+}
+
+INLINE void get_now(clockid_t clk_id, time_t *sec, long *msec) {
+	struct timespec ts;
+	assert(!clock_gettime(clk_id, &ts));
+	*sec = ts.tv_sec;
+	*msec = round(ts.tv_nsec / 1.0e6);
+
+	if (*msec > 999) {
+		*sec += 1;
+		*msec = 0;
+	}
+}
+
+#if defined(CLOCK_MONOTONIC_RAW)
+#	define X_CLOCK_MONOTONIC CLOCK_MONOTONIC_RAW
+#elif defined(CLOCK_MONOTONIC_FAST)
+#	define X_CLOCK_MONOTONIC CLOCK_MONOTONIC_FAST
+#else
+#	define X_CLOCK_MONOTONIC CLOCK_MONOTONIC
+#endif
+
+INLINE long double get_now_monotonic(void) {
+	time_t sec;
+	long msec;
+	get_now(X_CLOCK_MONOTONIC, &sec, &msec);
+	return (long double)sec + ((long double)msec) / 1000;
+}
+
+INLINE uint64_t get_now_monotonic_u64(void) {
+	struct timespec ts;
+	assert(!clock_gettime(X_CLOCK_MONOTONIC, &ts));
+	return (uint64_t)(ts.tv_nsec / 1000) + (uint64_t)ts.tv_sec * 1000000;
+}
+
+INLINE uint64_t get_now_id(void) {
+	uint64_t now = get_now_monotonic_u64();
+	return (uint64_t)triple_u32(now) | ((uint64_t)triple_u32(now + 12345) << 32);
+}
+
+#undef X_CLOCK_MONOTONIC
+
+INLINE long double get_now_real(void) {
+	time_t sec;
+	long msec;
+	get_now(CLOCK_REALTIME, &sec, &msec);
+	return (long double)sec + ((long double)msec) / 1000;
+}
+
+INLINE unsigned get_cores_available(void) {
+	long cores_sysconf = sysconf(_SC_NPROCESSORS_ONLN);
+	cores_sysconf = (cores_sysconf < 0 ? 0 : cores_sysconf);
+	return max_u(min_u(cores_sysconf, 4), 1);
+}
+
+INLINE int flock_timedwait_monotonic(int fd, long double timeout) {
+	long double deadline_ts = get_now_monotonic() + timeout;
+	int retval = -1;
+
+	while (true) {
+		retval = flock(fd, LOCK_EX | LOCK_NB);
+		if (retval == 0 || errno != EWOULDBLOCK || get_now_monotonic() > deadline_ts) {
+			break;
+		}
+		if (usleep(1000) < 0) {
+			break;
+		}
+	}
+	return retval;
+}
+
+INLINE char *errno_to_string(int error, char *buf, size_t size) {
+	assert(buf);
+	assert(size > 0);
+	locale_t locale = newlocale(LC_MESSAGES_MASK, "C", NULL);
+	char *str = "!!! newlocale() error !!!";
+	strncpy(buf, (locale ? strerror_l(error, locale) : str), size - 1);
+	buf[size - 1] = '\0';
+	if (locale) {
+		freelocale(locale);
+	}
+	return buf;
+}

src/libs/unjpeg.c

@@ -0,0 +1,92 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#include "unjpeg.h"
+
+
+typedef struct {
+	struct jpeg_error_mgr	mgr; // Default manager
+	jmp_buf					jmp;
+	const frame_s			*frame;
+} _jpeg_error_manager_s;
+
+
+static void _jpeg_error_handler(j_common_ptr jpeg);
+
+
+int unjpeg(const frame_s *src, frame_s *dest, bool decode) {
+	assert(is_jpeg(src->format));
+
+	volatile int retval = 0;
+
+	struct jpeg_decompress_struct jpeg;
+	jpeg_create_decompress(&jpeg);
+
+	// https://stackoverflow.com/questions/19857766/error-handling-in-libjpeg
+	_jpeg_error_manager_s jpeg_error;
+	jpeg.err = jpeg_std_error((struct jpeg_error_mgr *)&jpeg_error);
+	jpeg_error.mgr.error_exit = _jpeg_error_handler;
+	jpeg_error.frame = src;
+	if (setjmp(jpeg_error.jmp) < 0) {
+		retval = -1;
+		goto done;
+	}
+
+	jpeg_mem_src(&jpeg, src->data, src->used);
+	jpeg_read_header(&jpeg, TRUE);
+	jpeg.out_color_space = JCS_RGB;
+
+	jpeg_start_decompress(&jpeg);
+
+	frame_copy_meta(src, dest);
+	dest->format = V4L2_PIX_FMT_RGB24;
+	dest->width = jpeg.output_width;
+	dest->height = jpeg.output_height;
+	dest->stride = jpeg.output_width * jpeg.output_components; // Row stride
+	dest->used = 0;
+
+	if (decode) {
+		JSAMPARRAY scanlines;
+		scanlines = (*jpeg.mem->alloc_sarray)((j_common_ptr) &jpeg, JPOOL_IMAGE, dest->stride, 1);
+
+		frame_realloc_data(dest, ((dest->width * dest->height) << 1) * 2);
+		while (jpeg.output_scanline < jpeg.output_height) {
+			jpeg_read_scanlines(&jpeg, scanlines, 1);
+			frame_append_data(dest, scanlines[0], dest->stride);
+		}
+
+		jpeg_finish_decompress(&jpeg);
+	}
+
+	done:
+		jpeg_destroy_decompress(&jpeg);
+		return retval;
+}
+
+static void _jpeg_error_handler(j_common_ptr jpeg) {
+	_jpeg_error_manager_s *jpeg_error = (_jpeg_error_manager_s *)jpeg->err;
+	char msg[JMSG_LENGTH_MAX];
+
+	(*jpeg_error->mgr.format_message)(jpeg, msg);
+	LOG_ERROR("Can't decompress JPEG: %s", msg);
+	longjmp(jpeg_error->jmp, -1);
+}

src/libs/unjpeg.h

@@ -1,7 +1,8 @@
 /*****************************************************************************
-#    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
 #                                                                            #
-#    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
 #                                                                            #
 #    This program is free software: you can redistribute it and/or modify    #
 #    it under the terms of the GNU General Public License as published by    #
@@ -22,24 +23,18 @@
 #pragma once
 
 #include <stdio.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <setjmp.h>
+#include <assert.h>
 
-#include <sys/syscall.h>
+#include <sys/types.h>
 
-#include <IL/OMX_IVCommon.h>
-#include <IL/OMX_Core.h>
-#include <IL/OMX_Image.h>
+#include <jpeglib.h>
+#include <linux/videodev2.h>
 
-#include "../logging.h"
-#include "../tools.h"
+#include "logging.h"
+#include "frame.h"
 
 
-#define LOG_OMX_ERROR(_error, _msg, ...) { \
-		LOGGING_LOCK; \
-		printf("-- ERROR [%.03Lf tid=%ld] -- " _msg ": %s\n", get_now_monotonic(), \
-			syscall(SYS_gettid), ##__VA_ARGS__, omx_error_to_string(_error)); \
-		LOGGING_UNLOCK; \
-	}
-
-
-const char *omx_error_to_string(const OMX_ERRORTYPE error);
-const char *omx_state_to_string(const OMX_STATETYPE state);
+int unjpeg(const frame_s *src, frame_s *dest, bool decode);

src/logging.h

@@ -1,125 +0,0 @@
-/*****************************************************************************
-#    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
-#                                                                            #
-#    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
-#                                                                            #
-#    This program is free software: you can redistribute it and/or modify    #
-#    it under the terms of the GNU General Public License as published by    #
-#    the Free Software Foundation, either version 3 of the License, or       #
-#    (at your option) any later version.                                     #
-#                                                                            #
-#    This program is distributed in the hope that it will be useful,         #
-#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
-#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
-#    GNU General Public License for more details.                            #
-#                                                                            #
-#    You should have received a copy of the GNU General Public License       #
-#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
-#                                                                            #
-*****************************************************************************/
-
-
-#pragma once
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <errno.h>
-#include <time.h>
-#include <assert.h>
-
-#include <pthread.h>
-
-#include <sys/types.h>
-#include <sys/syscall.h>
-
-#include "tools.h"
-
-
-unsigned log_level;
-pthread_mutex_t log_mutex;
-
-
-#define LOG_LEVEL_INFO		0
-#define LOG_LEVEL_PERF		1
-#define LOG_LEVEL_VERBOSE	2
-#define LOG_LEVEL_DEBUG		3
-
-
-#define LOGGING_INIT	assert(!pthread_mutex_init(&log_mutex, NULL))
-#define LOGGING_DESTROY	assert(!pthread_mutex_destroy(&log_mutex))
-
-#define LOGGING_LOCK	assert(!pthread_mutex_lock(&log_mutex))
-#define LOGGING_UNLOCK	assert(!pthread_mutex_unlock(&log_mutex))
-
-
-#define SEP_INFO(_ch) { \
-		LOGGING_LOCK; \
-		for (int _i = 0; _i < 80; ++_i) { \
-			putchar(_ch); \
-		} \
-		putchar('\n'); \
-		fflush(stdout); \
-		LOGGING_UNLOCK; \
-	}
-
-#define SEP_DEBUG(_ch) { \
-		if (log_level >= LOG_LEVEL_DEBUG) { \
-			SEP_INFO(_ch); \
-		} \
-	}
-
-#define LOG_PRINTF_NOLOCK(_label, _msg, ...) { \
-		printf("-- " _label " [%.03Lf tid=%ld] -- " _msg "\n", get_now_monotonic(), syscall(SYS_gettid), ##__VA_ARGS__); \
-		fflush(stdout); \
-	}
-
-#define LOG_ERROR(_msg, ...) { \
-		LOGGING_LOCK; \
-		LOG_PRINTF_NOLOCK("ERROR", _msg, ##__VA_ARGS__); \
-		LOGGING_UNLOCK; \
-	}
-
-#define LOG_PERROR(_msg, ...) { \
-		char _buf[1024] = ""; \
-		char *_ptr = strerror_r(errno, _buf, 1024); \
-		LOGGING_LOCK; \
-		printf("-- ERROR [%.03Lf tid=%ld] -- " _msg ": %s\n", get_now_monotonic(), syscall(SYS_gettid), ##__VA_ARGS__, _ptr); \
-		fflush(stdout); \
-		LOGGING_UNLOCK; \
-	}
-
-#define LOG_INFO(_msg, ...) { \
-		LOGGING_LOCK; \
-		LOG_PRINTF_NOLOCK("INFO ", _msg, ##__VA_ARGS__); \
-		LOGGING_UNLOCK; \
-	}
-
-#define LOG_INFO_NOLOCK(_msg, ...) { \
-		LOG_PRINTF_NOLOCK("INFO ", _msg, ##__VA_ARGS__); \
-	}
-
-#define LOG_PERF(_msg, ...) { \
-		if (log_level >= LOG_LEVEL_PERF) { \
-			LOGGING_LOCK; \
-			LOG_PRINTF_NOLOCK("PERF ", _msg, ##__VA_ARGS__); \
-			LOGGING_UNLOCK; \
-		} \
-	}
-
-#define LOG_VERBOSE(_msg, ...) { \
-		if (log_level >= LOG_LEVEL_VERBOSE) { \
-			LOGGING_LOCK; \
-			LOG_PRINTF_NOLOCK("VERB ", _msg, ##__VA_ARGS__); \
-			LOGGING_UNLOCK; \
-		} \
-	}
-
-#define LOG_DEBUG(_msg, ...) { \
-		if (log_level >= LOG_LEVEL_DEBUG) { \
-			LOGGING_LOCK; \
-			LOG_PRINTF_NOLOCK("DEBUG", _msg, ##__VA_ARGS__); \
-			LOGGING_UNLOCK; \
-		} \
-	}

src/main.c

@@ -1,315 +0,0 @@
-/*****************************************************************************
-#    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
-#                                                                            #
-#    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
-#                                                                            #
-#    This program is free software: you can redistribute it and/or modify    #
-#    it under the terms of the GNU General Public License as published by    #
-#    the Free Software Foundation, either version 3 of the License, or       #
-#    (at your option) any later version.                                     #
-#                                                                            #
-#    This program is distributed in the hope that it will be useful,         #
-#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
-#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
-#    GNU General Public License for more details.                            #
-#                                                                            #
-#    You should have received a copy of the GNU General Public License       #
-#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
-#                                                                            #
-*****************************************************************************/
-
-
-#include <assert.h>
-#ifdef NDEBUG
-#	error WTF dude? Asserts are good things!
-#endif
-
-#include <stdio.h>
-#include <stdbool.h>
-#include <signal.h>
-#include <getopt.h>
-
-#include <pthread.h>
-
-#include "config.h"
-#include "tools.h"
-#include "logging.h"
-#include "device.h"
-#include "encoder.h"
-#include "stream.h"
-#include "http.h"
-
-
-static const char _short_opts[] = "d:i:x:y:f:a:e:z:tn:w:q:c:s:p:r:h";
-static const struct option _long_opts[] = {
-	{"device",					required_argument,	NULL,	'd'},
-	{"input",					required_argument,	NULL,	'i'},
-	{"width",					required_argument,	NULL,	'x'},
-	{"height",					required_argument,	NULL,	'y'},
-	{"format",					required_argument,	NULL,	'f'},
-	{"tv-standard",				required_argument,	NULL,	'a'},
-	{"soft-fps",				required_argument,	NULL,	'm'},
-	{"every-frame",				required_argument,	NULL,	'e'},
-	{"min-frame-size",			required_argument,	NULL,	'z'},
-	{"dv-timings",				no_argument,		NULL,	't'},
-	{"buffers",					required_argument,	NULL,	'b'},
-	{"workers",					required_argument,	NULL,	'w'},
-	{"quality",					required_argument,	NULL,	'q'},
-	{"encoder",					required_argument,	NULL,	'c'},
-#	ifdef OMX_ENCODER
-	{"encoder-omx-use-ijg",		required_argument,	NULL,	500},
-#	endif
-	{"device-timeout",			required_argument,	NULL,	1000},
-	{"device-persistent",		no_argument,		NULL,	1001},
-	{"device-error-delay",		required_argument,	NULL,	1002},
-
-	{"host",					required_argument,	NULL,	's'},
-	{"port",					required_argument,	NULL,	'p'},
-	{"drop-same-frames",		required_argument,	NULL,	'r'},
-	{"fake-width",				required_argument,	NULL,	2001},
-	{"fake-height",				required_argument,	NULL,	2002},
-	{"server-timeout",			required_argument,	NULL,	2003},
-
-	{"perf",					no_argument,		NULL,	5000},
-	{"verbose",					no_argument,		NULL,	5001},
-	{"debug",					no_argument,		NULL,	5002},
-	{"log-level",				required_argument,	NULL,	5010},
-	{"help",					no_argument,		NULL,	'h'},
-	{"version",					no_argument,		NULL,	6000},
-	{NULL, 0, NULL, 0},
-};
-
-static void _version(bool nl) {
-	printf(VERSION);
-#	ifdef OMX_ENCODER
-	printf(" + OMX");
-#	endif
-	if (nl) {
-		putchar('\n');
-	}
-}
-
-static void _help(struct device_t *dev, struct encoder_t *encoder, struct http_server_t *server) {
-	printf("\nuStreamer - Lightweight and fast MJPG-HTTP streamer\n");
-	printf("===================================================\n\n");
-	printf("Version: ");
-	_version(false);
-	printf("; license: GPLv3\n");
-	printf("Copyright (C) 2018 Maxim Devaev <mdevaev@gmail.com>\n\n");
-	printf("Capturing options:\n");
-	printf("------------------\n");
-	printf("    -d|--device </dev/path>          -- Path to V4L2 device. Default: %s.\n\n", dev->path);
-	printf("    -i|--input <N>                   -- Input channel. Default: %u.\n\n", dev->input);
-	printf("    -x|--width <N>                   -- Initial image width. Default: %d.\n\n", dev->width);
-	printf("    -y|--height <N>                  -- Initial image height. Default: %d.\n\n", dev->height);
-	printf("    -f|--format <fmt>                -- Image format.\n");
-	printf("                                        Available: %s; default: YUYV.\n\n", FORMATS_STR);
-	printf("    -a|--tv-standard <std>           -- Force TV standard.\n");
-	printf("                                        Available: %s; default: disabled.\n\n", STANDARDS_STR);
-	printf("    -m|--soft-fps <N>                -- Soft FPS limit; default: %u.\n\n", dev->soft_fps);
-	printf("    -e|--every-frame <N>             -- Drop all input frames except specified. Default: disabled.\n\n");
-	printf("    -z|--min-frame-size <N>          -- Drop frames smaller then this limit.\n");
-	printf("                                        Useful if the device produces small-sized garbage frames.\n\n");
-	printf("    -t|--dv-timings                  -- Enable DV timings queriyng and events processing.\n");
-	printf("                                        Supports automatic resolution changing. Default: disabled.\n\n");
-	printf("    -b|--buffers <N>                 -- The number of buffers to receive data from the device.\n");
-	printf("                                        Each buffer may processed using an intermediate thread.\n");
-	printf("                                        Default: %d (number of CPU cores + 1)\n\n", dev->n_buffers);
-	printf("    -w|--workers <N>                 -- The number of compressing threads. Default: %d (== --buffers).\n\n", dev->n_workers);
-	printf("    -q|--quality <N>                 -- Set quality of JPEG encoding from 1 to 100 (best). Default: %d.\n\n", encoder->quality);
-	printf("    --encoder <type>                 -- Use specified encoder. It may affects to workers number.\n");
-	printf("                                     -- Available: %s; default: CPU.\n\n", ENCODER_TYPES_STR);
-#	ifdef OMX_ENCODER
-	printf("    --encoder-omx-use-ijg            -- Use the standard IJG quality tables when encoding images using OMX.\n");
-	printf("                                        Default: disabled.\n\n");
-#	endif
-	printf("    --device-timeout <seconds>       -- Timeout for device querying. Default: %d\n\n", dev->timeout);
-	printf("    --device-persistent              -- Don't re-initialize device on timeout. Default: disabled.\n\n");
-	printf("    --device-error-delay <seconds>   -- Delay before trying to connect to the device again\n");
-	printf("                                        after a timeout. Default: %d\n\n", dev->error_delay);
-	printf("HTTP server options:\n");
-	printf("--------------------\n");
-	printf("    --host <address>           -- Listen on Hostname or IP. Default: %s\n\n", server->host);
-	printf("    --port <N>                 -- Bind to this TCP port. Default: %d\n\n", server->port);
-	printf("    --drop-same-frames <N>     -- Don't send same frames to clients, but no more than specified number.\n");
-	printf("                                  It can significantly reduce the outgoing traffic, but will increase\n");
-	printf("                                  the CPU loading. Don't use this option with analog signal sources\n");
-	printf("                                  or webcams, it's useless. Default: disabled.\n\n");
-	printf("    --fake-width <N>           -- Override image width for /ping. Default: disabled\n\n");
-	printf("    --fake-height <N>          -- Override image height for /ping. Default: disabled.\n\n");
-	printf("    --server-timeout <seconds> -- Timeout for client connections. Default: %d\n\n", server->timeout);
-	printf("Misc options:\n");
-	printf("-------------\n");
-	printf("    --log-level <N> -- Verbosity level of messages from 0 (info) to 3 (debug).\n");
-	printf("                       Enabling debugging messages can slow down the program.\n");
-	printf("                       Available levels: 0=info, 1=performance, 2=verbose, 3=debug.\n");
-	printf("                       Default: %d.\n\n", log_level);
-	printf("    --perf          -- Enable performance messages (same as log-level=1). Default: disabled.\n\n");
-	printf("    --verbose       -- Enable verbose messages and lower (same as log-level=2). Default: disabled.\n\n");
-	printf("    --debug         -- Enable debug messages and lower (same as --log-level=3). Default: disabled.\n\n");
-	printf("    -h|--help       -- Print this messages and exit.\n\n");
-}
-
-static int _parse_options(int argc, char *argv[], struct device_t *dev, struct encoder_t *encoder, struct http_server_t *server) {
-#	define OPT_SET(_dest, _value) \
-		{ _dest = _value; break; }
-
-#	define OPT_UNSIGNED(_dest, _name, _min, _max) \
-		{ errno = 0; int _tmp = strtol(optarg, NULL, 0); \
-		if (errno || _tmp < _min || _tmp > _max) \
-		{ printf("Invalid value for '%s=%u'; min=%u; max=%u\n", _name, _tmp, _min, _max); return -1; } \
-		_dest = _tmp; break; }
-
-#	define OPT_PARSE(_dest, _func, _invalid, _name) \
-		{ if ((_dest = _func(optarg)) == _invalid) \
-		{ printf("Unknown " _name ": %s\n", optarg); return -1; } \
-		break; }
-
-	int index;
-	int ch;
-
-	log_level = LOG_LEVEL_INFO;
-	while ((ch = getopt_long(argc, argv, _short_opts, _long_opts, &index)) >= 0) {
-		switch (ch) {
-			case 'd':	OPT_SET(dev->path, optarg);
-			case 'i':	OPT_UNSIGNED(dev->input, "--input", 0, 128);
-			case 'x':	OPT_UNSIGNED(dev->width, "--width", 320, 1920);
-			case 'y':	OPT_UNSIGNED(dev->height, "--height", 180, 1200);
-#			pragma GCC diagnostic ignored "-Wsign-compare"
-#			pragma GCC diagnostic push
-			case 'f':	OPT_PARSE(dev->format, device_parse_format, FORMAT_UNKNOWN, "pixel format");
-#			pragma GCC diagnostic pop
-			case 'a':	OPT_PARSE(dev->standard, device_parse_standard, STANDARD_UNKNOWN, "TV standard");
-			case 'm':	OPT_UNSIGNED(dev->soft_fps, "--soft-fps", 1, 30);
-			case 'e':	OPT_UNSIGNED(dev->every_frame, "--every-frame", 1, 30);
-			case 'z':	OPT_UNSIGNED(dev->min_frame_size, "--min-frame-size", 0, 8192);
-			case 't':	OPT_SET(dev->dv_timings, true);
-			case 'b':	OPT_UNSIGNED(dev->n_buffers, "--buffers", 1, 32);
-			case 'w':	OPT_UNSIGNED(dev->n_workers, "--workers", 1, 32);
-			case 'q':	OPT_UNSIGNED(encoder->quality, "--quality", 1, 100);
-			case 'c':	OPT_PARSE(encoder->type, encoder_parse_type, ENCODER_TYPE_UNKNOWN, "encoder type");
-#			ifdef OMX_ENCODER
-			case 500:	OPT_SET(encoder->omx_use_ijg, true);
-#			endif
-			case 1000:	OPT_UNSIGNED(dev->timeout, "--device-timeout", 1, 60);
-			case 1001:	OPT_SET(dev->persistent, true);
-			case 1002:	OPT_UNSIGNED(dev->error_delay, "--device-error-delay", 1, 60);
-
-			case 's':	OPT_SET(server->host, optarg);
-			case 'p':	OPT_UNSIGNED(server->port, "--port", 1, 65535);
-			case 'r':	OPT_UNSIGNED(server->drop_same_frames, "--drop-same-frames", 0, 30);
-			case 2001:	OPT_UNSIGNED(server->fake_width, "--fake-width", 0, 1920);
-			case 2002:	OPT_UNSIGNED(server->fake_height, "--fake-height", 0, 1200);
-			case 2003:	OPT_UNSIGNED(server->timeout, "--server-timeout", 1, 60);
-
-			case 5000:	OPT_SET(log_level, LOG_LEVEL_PERF);
-			case 5001:	OPT_SET(log_level, LOG_LEVEL_VERBOSE);
-			case 5002:	OPT_SET(log_level, LOG_LEVEL_DEBUG);
-			case 5010:	OPT_UNSIGNED(log_level, "--log-level", 0, 3);
-			case 'h':	_help(dev, encoder, server); return 1;
-			case 6000:	_version(true); return 1;
-			case 0:		break;
-			default:	_help(dev, encoder, server); return -1;
-		}
-	}
-
-#	undef OPT_PARSE
-#	undef OPT_UNSIGNED
-#	undef OPT_SET
-	return 0;
-}
-
-struct main_context_t {
-	struct stream_t			*stream;
-	struct http_server_t	*server;
-};
-
-static struct main_context_t *_ctx;
-
-static void _block_thread_signals() {
-	sigset_t mask;
-	assert(!sigemptyset(&mask));
-	assert(!sigaddset(&mask, SIGINT));
-	assert(!sigaddset(&mask, SIGTERM));
-	assert(!pthread_sigmask(SIG_BLOCK, &mask, NULL));
-}
-
-static void *_stream_loop_thread(UNUSED void *arg) {
-	_block_thread_signals();
-	stream_loop(_ctx->stream);
-	return NULL;
-}
-
-static void *_server_loop_thread(UNUSED void *arg) {
-	_block_thread_signals();
-	http_server_loop(_ctx->server);
-	return NULL;
-}
-
-static void _signal_handler(int signum) {
-	LOG_INFO_NOLOCK("===== Stopping by %s =====", (signum == SIGTERM ? "SIGTERM" : "SIGINT"));
-	stream_loop_break(_ctx->stream);
-	http_server_loop_break(_ctx->server);
-}
-
-static void _install_signal_handlers() {
-	struct sigaction sig_act;
-
-	MEMSET_ZERO(sig_act);
-	assert(!sigemptyset(&sig_act.sa_mask));
-	sig_act.sa_handler = _signal_handler;
-	assert(!sigaddset(&sig_act.sa_mask, SIGINT));
-	assert(!sigaddset(&sig_act.sa_mask, SIGTERM));
-
-	LOG_INFO("Installing SIGINT handler ...");
-	assert(!sigaction(SIGINT, &sig_act, NULL));
-
-	LOG_INFO("Installing SIGTERM handler ...");
-	assert(!sigaction(SIGTERM, &sig_act, NULL));
-
-	LOG_INFO("Ignoring SIGPIPE ...");
-	assert(signal(SIGPIPE, SIG_IGN) != SIG_ERR);
-}
-
-int main(int argc, char *argv[]) {
-	struct device_t *dev;
-	struct encoder_t *encoder;
-	struct stream_t *stream;
-	struct http_server_t *server;
-	int exit_code = 0;
-
-	LOGGING_INIT;
-
-	dev = device_init();
-	encoder = encoder_init();
-	stream = stream_init(dev, encoder);
-	server = http_server_init(stream);
-
-	if ((exit_code = _parse_options(argc, argv, dev, encoder, server)) == 0) {
-		_install_signal_handlers();
-		encoder_prepare(encoder, dev);
-
-		pthread_t stream_loop_tid;
-		pthread_t server_loop_tid;
-		struct main_context_t ctx;
-
-		ctx.stream = stream;
-		ctx.server = server;
-		_ctx = &ctx;
-
-		if ((exit_code = http_server_listen(server)) == 0) {
-			A_PTHREAD_CREATE(&stream_loop_tid, _stream_loop_thread, NULL);
-			A_PTHREAD_CREATE(&server_loop_tid, _server_loop_thread, NULL);
-			A_PTHREAD_JOIN(stream_loop_tid);
-			A_PTHREAD_JOIN(server_loop_tid);
-		}
-	}
-
-	http_server_destroy(server);
-	stream_destroy(stream);
-	encoder_destroy(encoder);
-	device_destroy(dev);
-
-	LOGGING_DESTROY;
-	return (exit_code < 0 ? 1 : 0);
-}

src/omx/component.c

@@ -1,155 +0,0 @@
-/*****************************************************************************
-#    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
-#                                                                            #
-#    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
-#                                                                            #
-#    This program is free software: you can redistribute it and/or modify    #
-#    it under the terms of the GNU General Public License as published by    #
-#    the Free Software Foundation, either version 3 of the License, or       #
-#    (at your option) any later version.                                     #
-#                                                                            #
-#    This program is distributed in the hope that it will be useful,         #
-#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
-#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
-#    GNU General Public License for more details.                            #
-#                                                                            #
-#    You should have received a copy of the GNU General Public License       #
-#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
-#                                                                            #
-*****************************************************************************/
-
-
-#include <unistd.h>
-
-#include <IL/OMX_Core.h>
-#include <IL/OMX_Component.h>
-
-#include "../logging.h"
-
-#include "formatters.h"
-#include "component.h"
-
-
-static int _component_wait_port_changed(OMX_HANDLETYPE *component, const OMX_U32 port, const OMX_BOOL enabled);
-static int _component_wait_state_changed(OMX_HANDLETYPE *component, const OMX_STATETYPE wanted);
-
-
-int component_enable_port(OMX_HANDLETYPE *component, const OMX_U32 port) {
-	OMX_ERRORTYPE error;
-
-	LOG_DEBUG("Enabling OMX port %u ...", port);
-	if ((error = OMX_SendCommand(*component, OMX_CommandPortEnable, port, NULL)) != OMX_ErrorNone) {
-		LOG_OMX_ERROR(error, "Can't enable OMX port %u", port);
-		return -1;
-	}
-	return _component_wait_port_changed(component, port, OMX_TRUE);
-}
-
-int component_disable_port(OMX_HANDLETYPE *component, const OMX_U32 port) {
-	OMX_ERRORTYPE error;
-
-	LOG_DEBUG("Disabling OMX port %u ...", port);
-	if ((error = OMX_SendCommand(*component, OMX_CommandPortDisable, port, NULL)) != OMX_ErrorNone) {
-		LOG_OMX_ERROR(error, "Can't disable OMX port %u", port);
-		return -1;
-	}
-	return _component_wait_port_changed(component, port, OMX_FALSE);
-}
-
-int component_get_portdef(OMX_HANDLETYPE *component, OMX_PARAM_PORTDEFINITIONTYPE *portdef, const OMX_U32 port) {
-	OMX_ERRORTYPE error;
-
-	OMX_INIT_STRUCTURE(*portdef);
-	portdef->nPortIndex = port;
-
-	LOG_DEBUG("Fetching OMX port %u definition ...", port);
-	if ((error = OMX_GetParameter(*component, OMX_IndexParamPortDefinition, portdef)) != OMX_ErrorNone) {
-		LOG_OMX_ERROR(error, "Can't get OMX port %u definition", port);
-		return -1;
-	}
-	return 0;
-}
-
-int component_set_portdef(OMX_HANDLETYPE *component, OMX_PARAM_PORTDEFINITIONTYPE *portdef) {
-	OMX_ERRORTYPE error;
-
-	LOG_DEBUG("Writing OMX port %u definition ...", portdef->nPortIndex);
-	if ((error = OMX_SetParameter(*component, OMX_IndexParamPortDefinition, portdef)) != OMX_ErrorNone) {
-		LOG_OMX_ERROR(error, "Can't set OMX port %u definition", portdef->nPortIndex);
-		return -1;
-	}
-	return 0;
-}
-
-int component_set_state(OMX_HANDLETYPE *component, const OMX_STATETYPE state) {
-	const char *const state_str = omx_state_to_string(state);
-	OMX_ERRORTYPE error;
-	int retries = 50;
-
-	LOG_DEBUG("Switching component state to %s ...", state_str);
-
-	do {
-		error = OMX_SendCommand(*component, OMX_CommandStateSet, state, NULL);
-		if (error == OMX_ErrorNone) {
-			return _component_wait_state_changed(component, state);
-		} else if (error == OMX_ErrorInsufficientResources && retries) {
-			// Иногда железо не инициализируется, хз почему, просто ретраим, со второй попытки сработает
-			LOG_OMX_ERROR(error, "Can't switch OMX component state to %s, need to retry", state_str);
-			retries -= 1;
-			usleep(8000);
-		} else {
-			break;
-		}
-	} while (retries);
-
-	LOG_OMX_ERROR(error, "Can't switch OMX component state to %s", state_str);
-	return -1;
-}
-
-
-static int _component_wait_port_changed(OMX_HANDLETYPE *component, const OMX_U32 port, const OMX_BOOL enabled) {
-	OMX_ERRORTYPE error;
-	OMX_PARAM_PORTDEFINITIONTYPE portdef;
-	int retries = 50;
-
-	OMX_INIT_STRUCTURE(portdef);
-	portdef.nPortIndex = port;
-
-	do {
-		if ((error = OMX_GetParameter(*component, OMX_IndexParamPortDefinition, &portdef)) != OMX_ErrorNone) {
-			LOG_OMX_ERROR(error, "Can't get OMX port %u definition for waiting", port);
-			return -1;
-		}
-
-		if (portdef.bEnabled != enabled) {
-			LOG_DEBUG("Waiting for OMX %s port %u", (enabled ? "enabling" : "disabling"), port);
-			retries -= 1;
-			usleep(8000);
-		}
-	} while (portdef.bEnabled != enabled && retries);
-
-	LOG_DEBUG("OMX port %u %s", port, (enabled ? "enabled" : "disabled"));
-	return (portdef.bEnabled == enabled ? 0 : -1);
-}
-
-static int _component_wait_state_changed(OMX_HANDLETYPE *component, const OMX_STATETYPE wanted) {
-	OMX_ERRORTYPE error;
-	OMX_STATETYPE state;
-	int retries = 50;
-
-	do {
-		if ((error = OMX_GetState(*component, &state)) != OMX_ErrorNone) {
-			LOG_OMX_ERROR(error, "Failed to get OMX component state");
-			return -1;
-		}
-
-		if (state != wanted) {
-			LOG_DEBUG("Waiting when OMX component state changes to %s", omx_state_to_string(wanted));
-			retries -= 1;
-			usleep(8000);
-		}
-	} while (state != wanted && retries);
-
-	LOG_DEBUG("Switched OMX component state to %s", omx_state_to_string(wanted))
-	return (state == wanted ? 0 : -1);
-}

src/omx/encoder.c

@@ -1,476 +0,0 @@
-/*****************************************************************************
-#    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
-#                                                                            #
-#    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
-#                                                                            #
-#    This program is free software: you can redistribute it and/or modify    #
-#    it under the terms of the GNU General Public License as published by    #
-#    the Free Software Foundation, either version 3 of the License, or       #
-#    (at your option) any later version.                                     #
-#                                                                            #
-#    This program is distributed in the hope that it will be useful,         #
-#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
-#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
-#    GNU General Public License for more details.                            #
-#                                                                            #
-#    You should have received a copy of the GNU General Public License       #
-#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
-#                                                                            #
-*****************************************************************************/
-
-
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <assert.h>
-
-#include <linux/videodev2.h>
-
-#include <bcm_host.h>
-#include <IL/OMX_Core.h>
-#include <IL/OMX_Component.h>
-#include <IL/OMX_Broadcom.h>
-#include <interface/vcos/vcos_semaphore.h>
-
-#include "../logging.h"
-#include "../tools.h"
-#include "../device.h"
-
-#include "formatters.h"
-#include "component.h"
-#include "encoder.h"
-
-
-#define INPUT_PORT 340
-#define OUTPUT_PORT 341
-
-
-static int _i_omx = 0;
-
-
-static int _omx_init_component(struct omx_encoder_t *omx);
-static int _omx_init_disable_ports(struct omx_encoder_t *omx);
-static int _omx_setup_input(struct omx_encoder_t *omx, struct device_t *dev);
-static int _omx_setup_output(struct omx_encoder_t *omx, const unsigned quality, const bool use_ijg);
-static int _omx_encoder_clear_ports(struct omx_encoder_t *omx);
-
-static OMX_ERRORTYPE _omx_event_handler(UNUSED OMX_HANDLETYPE encoder,
-	OMX_PTR v_omx, OMX_EVENTTYPE event, OMX_U32 data1,
-	UNUSED OMX_U32 data2, UNUSED OMX_PTR event_data);
-
-static OMX_ERRORTYPE _omx_input_required_handler(UNUSED OMX_HANDLETYPE encoder,
-	OMX_PTR v_omx, UNUSED OMX_BUFFERHEADERTYPE *buffer);
-
-static OMX_ERRORTYPE _omx_output_available_handler(UNUSED OMX_HANDLETYPE encoder,
-	OMX_PTR v_omx, UNUSED OMX_BUFFERHEADERTYPE *buffer);
-
-
-struct omx_encoder_t *omx_encoder_init() {
-	// Some theory:
-	//   - http://www.fourcc.org/yuv.php
-	//   - https://kwasi-ich.de/blog/2017/11/26/omx/
-	//   - https://github.com/hopkinskong/rpi-omx-jpeg-encode/blob/master/jpeg_bench.cpp
-	//   - https://github.com/kwasmich/OMXPlayground/blob/master/omxJPEGEnc.c
-	//   - https://github.com/gagle/raspberrypi-openmax-jpeg/blob/master/jpeg.c
-	//   - https://www.raspberrypi.org/forums/viewtopic.php?t=154790
-	//   - https://bitbucket.org/bensch128/omxjpegencode/src/master/jpeg_encoder.cpp
-
-	struct omx_encoder_t *omx;
-	OMX_ERRORTYPE error;
-
-	A_CALLOC(omx, 1);
-
-	assert(_i_omx >= 0);
-	if (_i_omx == 0) {
-		LOG_INFO("Initializing BCM ...");
-		bcm_host_init();
-
-		LOG_INFO("Initializing OMX ...");
-		if ((error = OMX_Init()) != OMX_ErrorNone) {
-			LOG_OMX_ERROR(error, "Can't initialize OMX");
-			goto error;
-		}
-	}
-	_i_omx += 1;
-
-	LOG_INFO("Initializing OMX JPEG encoder ...");
-
-	if (vcos_semaphore_create(&omx->handler_lock, "handler_lock", 0) != VCOS_SUCCESS) {
-		LOG_ERROR("Can't create VCOS semaphore");
-		goto error;
-	}
-	omx->i_handler_lock = true;
-
-	if (_omx_init_component(omx) < 0) {
-		goto error;
-	}
-
-	if (_omx_init_disable_ports(omx) < 0) {
-		goto error;
-	}
-
-	return omx;
-
-	error:
-		omx_encoder_destroy(omx);
-		return NULL;
-}
-
-void omx_encoder_destroy(struct omx_encoder_t *omx) {
-	OMX_ERRORTYPE error;
-
-	LOG_INFO("Destroying OMX JPEG encoder ...");
-
-	component_set_state(&omx->encoder, OMX_StateIdle);
-	_omx_encoder_clear_ports(omx);
-	component_set_state(&omx->encoder, OMX_StateLoaded);
-
-	if (omx->i_handler_lock) {
-		vcos_semaphore_delete(&omx->handler_lock);
-	}
-
-	if (omx->i_encoder) {
-		if ((error = OMX_FreeHandle(omx->encoder)) != OMX_ErrorNone) {
-			LOG_OMX_ERROR(error, "Can't free OMX.broadcom.image_encode");
-		}
-	}
-
-	assert(_i_omx >= 0);
-	_i_omx -= 1;
-	if (_i_omx == 0) {
-		LOG_INFO("Destroying OMX ...");
-		OMX_Deinit();
-
-		LOG_INFO("Destroying BCM ...");
-		bcm_host_deinit();
-	}
-
-	free(omx);
-}
-
-int omx_encoder_prepare_live(struct omx_encoder_t *omx, struct device_t *dev, const unsigned quality, const bool use_ijg) {
-	if (component_set_state(&omx->encoder, OMX_StateIdle) < 0) {
-		return -1;
-	}
-	if (_omx_encoder_clear_ports(omx) < 0) {
-		return -1;
-	}
-	if (_omx_setup_input(omx, dev) < 0) {
-		return -1;
-	}
-	if (_omx_setup_output(omx, quality, use_ijg) < 0) {
-		return -1;
-	}
-	if (component_set_state(&omx->encoder, OMX_StateExecuting) < 0) {
-		return -1;
-	}
-	return 0;
-}
-
-int omx_encoder_compress_buffer(struct omx_encoder_t *omx, struct device_t *dev, const unsigned index) {
-	OMX_ERRORTYPE error;
-	bool loaded = false;
-
-	if ((error = OMX_FillThisBuffer(omx->encoder, omx->output_buffer)) != OMX_ErrorNone) {
-		LOG_OMX_ERROR(error, "Failed to request filling of the output buffer on encoder");
-		return -1;
-	}
-
-	dev->run->pictures[index].size = 0;
-	omx->output_available = false;
-	omx->input_required = true;
-
-	while (true) {
-		if (omx->failed) {
-			return -1;
-		}
-
-		if (omx->output_available) {
-			omx->output_available = false;
-
-			memcpy(
-				dev->run->pictures[index].data + dev->run->pictures[index].size,
-				omx->output_buffer->pBuffer,
-				omx->output_buffer->nFilledLen
-			);
-			assert(dev->run->pictures[index].size + omx->output_buffer->nFilledLen <= dev->run->max_picture_size);
-			dev->run->pictures[index].size += omx->output_buffer->nFilledLen;
-
-			if (omx->output_buffer->nFlags & OMX_BUFFERFLAG_ENDOFFRAME) {
-				omx->output_buffer->nFlags = 0;
-				break;
-			}
-
-			if ((error = OMX_FillThisBuffer(omx->encoder, omx->output_buffer)) != OMX_ErrorNone) {
-				LOG_OMX_ERROR(error, "Failed to request filling of the output buffer on encoder");
-				return -1;
-			}
-		}
-
-		if (omx->input_required) {
-			omx->input_required = false;
-			if (loaded) {
-				continue;
-			}
-			loaded = true;
-
-			memcpy(omx->input_buffer->pBuffer, dev->run->hw_buffers[index].start, dev->run->hw_buffers[index].length);
-			omx->input_buffer->nOffset = 0;
-			omx->input_buffer->nFilledLen = dev->run->hw_buffers[index].length;
-
-			if ((error = OMX_EmptyThisBuffer(omx->encoder, omx->input_buffer)) != OMX_ErrorNone) {
-				LOG_OMX_ERROR(error, "Failed to request emptying of the input buffer on encoder");
-				return -1;
-			}
-		}
-
-		vcos_semaphore_wait(&omx->handler_lock);
-	}
-	return 0;
-}
-
-static int _omx_init_component(struct omx_encoder_t *omx) {
-	// http://home.nouwen.name/RaspberryPi/documentation/ilcomponents/image_encode.html
-
-	OMX_ERRORTYPE error;
-
-	OMX_CALLBACKTYPE callbacks;
-	MEMSET_ZERO(callbacks);
-	callbacks.EventHandler = _omx_event_handler;
-	callbacks.EmptyBufferDone = _omx_input_required_handler;
-	callbacks.FillBufferDone = _omx_output_available_handler;
-
-	LOG_DEBUG("Initializing OMX.broadcom.image_encode ...");
-	if ((error = OMX_GetHandle(&omx->encoder, "OMX.broadcom.image_encode", omx, &callbacks)) != OMX_ErrorNone) {
-		LOG_OMX_ERROR(error, "Can't initialize OMX.broadcom.image_encode");
-		return -1;
-	}
-	omx->i_encoder = true;
-	return 0;
-}
-
-static int _omx_init_disable_ports(struct omx_encoder_t *omx) {
-	OMX_ERRORTYPE error;
-	OMX_INDEXTYPE types[] = {
-		OMX_IndexParamAudioInit, OMX_IndexParamVideoInit,
-		OMX_IndexParamImageInit, OMX_IndexParamOtherInit,
-	};
-	OMX_PORT_PARAM_TYPE ports;
-
-	OMX_INIT_STRUCTURE(ports);
-	if ((error = OMX_GetParameter(omx->encoder, OMX_IndexParamImageInit, &ports)) != OMX_ErrorNone) {
-		LOG_OMX_ERROR(error, "Can't OMX_GetParameter(OMX_IndexParamImageInit)");
-		return -1;
-	}
-
-	for (unsigned index = 0; index < 4; ++index) {
-		if ((error = OMX_GetParameter(omx->encoder, types[index], &ports)) != OMX_ErrorNone) {
-			LOG_OMX_ERROR(error, "Can't OMX_GetParameter(types[%u])", index);
-			return -1;
-		}
-		for (OMX_U32 port = ports.nStartPortNumber; port < ports.nStartPortNumber + ports.nPorts; ++port) {
-			if (component_disable_port(&omx->encoder, port) < 0) {
-				return -1;
-			}
-		}
-	}
-	return 0;
-}
-
-static int _omx_setup_input(struct omx_encoder_t *omx, struct device_t *dev) {
-	OMX_ERRORTYPE error;
-	OMX_PARAM_PORTDEFINITIONTYPE portdef;
-
-	LOG_DEBUG("Setting up OMX JPEG input port ...");
-
-	if (component_get_portdef(&omx->encoder, &portdef, INPUT_PORT) < 0) {
-		LOG_ERROR("... first");
-		return -1;
-	}
-
-	portdef.format.image.nFrameWidth = dev->run->width;
-	portdef.format.image.nFrameHeight = dev->run->height;
-	portdef.format.image.nStride = 0;
-#	define ALIGN(_x, _y) (((_x) + ((_y) - 1)) & ~((_y) - 1))
-	portdef.format.image.nSliceHeight = ALIGN(dev->run->height, 16);
-#	undef ALIGN
-	portdef.format.image.bFlagErrorConcealment = OMX_FALSE;
-	portdef.format.image.eCompressionFormat = OMX_IMAGE_CodingUnused;
-	portdef.nBufferSize = dev->run->max_picture_size;
-
-	switch (dev->run->format) {
-		// https://www.fourcc.org/yuv.php
-		// Also see comments inside OMX_IVCommon.h
-		case V4L2_PIX_FMT_YUYV: portdef.format.image.eColorFormat = OMX_COLOR_FormatYCbYCr; break;
-		case V4L2_PIX_FMT_UYVY: portdef.format.image.eColorFormat = OMX_COLOR_FormatCbYCrY; break;
-		case V4L2_PIX_FMT_RGB565: portdef.format.image.eColorFormat = OMX_COLOR_Format16bitRGB565; break;
-		// TODO: Check RGB565 + OMX. I don't have any USB devices which supports it.
-		default: assert(0 && "Unsupported input format for OMX JPEG compressor");
-	}
-
-	if (component_set_portdef(&omx->encoder, &portdef) < 0) {
-		return -1;
-	}
-
-	if (component_get_portdef(&omx->encoder, &portdef, INPUT_PORT) < 0) {
-		LOG_ERROR("... second");
-		return -1;
-	}
-
-	if (component_enable_port(&omx->encoder, INPUT_PORT) < 0) {
-		return -1;
-	}
-	omx->i_input_port_enabled = true;
-
-	if ((error = OMX_AllocateBuffer(omx->encoder, &omx->input_buffer, INPUT_PORT, NULL, portdef.nBufferSize)) != OMX_ErrorNone) {
-		LOG_OMX_ERROR(error, "Can't allocate OMX JPEG input buffer");
-		return -1;
-	}
-	return 0;
-}
-
-static int _omx_setup_output(struct omx_encoder_t *omx, const unsigned quality, const bool use_ijg) {
-	OMX_ERRORTYPE error;
-	OMX_PARAM_PORTDEFINITIONTYPE portdef;
-
-	LOG_DEBUG("Setting up OMX JPEG output port ...");
-
-	if (component_get_portdef(&omx->encoder, &portdef, OUTPUT_PORT) < 0) {
-		LOG_ERROR("... first");
-		return -1;
-	}
-
-	portdef.format.image.bFlagErrorConcealment = OMX_FALSE;
-	portdef.format.image.eCompressionFormat = OMX_IMAGE_CodingJPEG;
-	portdef.format.image.eColorFormat = OMX_COLOR_FormatYCbYCr;
-
-	if (component_set_portdef(&omx->encoder, &portdef) < 0) {
-		return -1;
-	}
-
-	if (component_get_portdef(&omx->encoder, &portdef, OUTPUT_PORT) < 0) {
-		LOG_ERROR("... second");
-		return -1;
-	}
-
-	{
-		OMX_CONFIG_BOOLEANTYPE exif;
-
-		OMX_INIT_STRUCTURE(exif);
-		exif.bEnabled = OMX_FALSE;
-
-		if ((error = OMX_SetParameter(omx->encoder, OMX_IndexParamBrcmDisableEXIF, &exif)) != OMX_ErrorNone) {
-			LOG_OMX_ERROR(error, "Can't disable EXIF on OMX JPEG");
-			return -1;
-		}
-	}
-
-	if (use_ijg) {
-		OMX_PARAM_IJGSCALINGTYPE ijg;
-
-		OMX_INIT_STRUCTURE(ijg);
-		ijg.nPortIndex = OUTPUT_PORT;
-		ijg.bEnabled = OMX_TRUE;
-
-		if ((error = OMX_SetParameter(omx->encoder, OMX_IndexParamBrcmEnableIJGTableScaling, &ijg)) != OMX_ErrorNone) {
-			LOG_OMX_ERROR(error, "Can't set OMX JPEG IJG settings");
-			return -1;
-		}
-	}
-
-	{
-		OMX_IMAGE_PARAM_QFACTORTYPE qfactor;
-
-		OMX_INIT_STRUCTURE(qfactor);
-		qfactor.nPortIndex = OUTPUT_PORT;
-		qfactor.nQFactor = quality;
-
-		if ((error = OMX_SetParameter(omx->encoder, OMX_IndexParamQFactor, &qfactor)) != OMX_ErrorNone) {
-			LOG_OMX_ERROR(error, "Can't set OMX JPEG quality");
-			return -1;
-		}
-	}
-
-	if (component_enable_port(&omx->encoder, OUTPUT_PORT) < 0) {
-		return -1;
-	}
-	omx->i_output_port_enabled = true;
-
-	if ((error = OMX_AllocateBuffer(omx->encoder, &omx->output_buffer, OUTPUT_PORT, NULL, portdef.nBufferSize)) != OMX_ErrorNone) {
-		LOG_OMX_ERROR(error, "Can't allocate OMX JPEG output buffer");
-		return -1;
-	}
-	return 0;
-}
-
-static int _omx_encoder_clear_ports(struct omx_encoder_t *omx) {
-	OMX_ERRORTYPE error;
-	int retcode = 0;
-
-	if (omx->i_output_port_enabled) {
-		retcode -= component_disable_port(&omx->encoder, OUTPUT_PORT);
-		omx->i_output_port_enabled = false;
-	}
-	if (omx->i_input_port_enabled) {
-		retcode -= component_disable_port(&omx->encoder, INPUT_PORT);
-		omx->i_input_port_enabled = false;
-	}
-
-	if (omx->input_buffer) {
-		if ((error = OMX_FreeBuffer(omx->encoder, INPUT_PORT, omx->input_buffer)) != OMX_ErrorNone) {
-			LOG_OMX_ERROR(error, "Can't free OMX JPEG input buffer");
-			// retcode -= 1;
-		}
-		omx->input_buffer = NULL;
-	}
-	if (omx->output_buffer) {
-		if ((error = OMX_FreeBuffer(omx->encoder, OUTPUT_PORT, omx->output_buffer)) != OMX_ErrorNone) {
-			LOG_OMX_ERROR(error, "Can't free OMX JPEG output buffer");
-			// retcode -= 1;
-		}
-		omx->output_buffer = NULL;
-	}
-	return retcode;
-}
-
-static OMX_ERRORTYPE _omx_event_handler(UNUSED OMX_HANDLETYPE encoder,
-	OMX_PTR v_omx, OMX_EVENTTYPE event, OMX_U32 data1,
-	UNUSED OMX_U32 data2, UNUSED OMX_PTR event_data) {
-
-	// OMX calls this handler for all the events it emits
-
-	struct omx_encoder_t *omx = (struct omx_encoder_t *)v_omx;
-
-	if (event == OMX_EventError) {
-		LOG_OMX_ERROR((OMX_ERRORTYPE)data1, "OMX error event received");
-		omx->failed = true;
-		vcos_semaphore_post(&omx->handler_lock);
-	}
-	return OMX_ErrorNone;
-}
-
-static OMX_ERRORTYPE _omx_input_required_handler(UNUSED OMX_HANDLETYPE encoder,
-	OMX_PTR v_omx, UNUSED OMX_BUFFERHEADERTYPE *buffer) {
-
-	// Called by OMX when the encoder component requires
-	// the input buffer to be filled with RAW image data
-
-	struct omx_encoder_t *omx = (struct omx_encoder_t *)v_omx;
-
-	omx->input_required = true;
-	vcos_semaphore_post(&omx->handler_lock);
-	return OMX_ErrorNone;
-}
-
-static OMX_ERRORTYPE _omx_output_available_handler(UNUSED OMX_HANDLETYPE encoder,
-	OMX_PTR v_omx, UNUSED OMX_BUFFERHEADERTYPE *buffer) {
-
-	// Called by OMX when the encoder component has filled
-	// the output buffer with JPEG data
-
-	struct omx_encoder_t *omx = (struct omx_encoder_t *)v_omx;
-
-	omx->output_available = true;
-	vcos_semaphore_post(&omx->handler_lock);
-	return OMX_ErrorNone;
-}

src/omx/formatters.c

@@ -1,82 +0,0 @@
-/*****************************************************************************
-#    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
-#                                                                            #
-#    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
-#                                                                            #
-#    This program is free software: you can redistribute it and/or modify    #
-#    it under the terms of the GNU General Public License as published by    #
-#    the Free Software Foundation, either version 3 of the License, or       #
-#    (at your option) any later version.                                     #
-#                                                                            #
-#    This program is distributed in the hope that it will be useful,         #
-#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
-#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
-#    GNU General Public License for more details.                            #
-#                                                                            #
-#    You should have received a copy of the GNU General Public License       #
-#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
-#                                                                            #
-*****************************************************************************/
-
-
-#include <stdio.h>
-#include <assert.h>
-
-#include <IL/OMX_IVCommon.h>
-#include <IL/OMX_Core.h>
-
-#include "../tools.h"
-#include "formatters.h"
-
-
-#define CASE_TO_STRING(_value) \
-	case _value: { return #_value; }
-
-#define CASE_ASSERT(_msg, _value) default: { \
-		char *_buf; A_CALLOC(_buf, 128); \
-		sprintf(_buf, _msg ": 0x%08x", _value); \
-		assert(0 && _buf); \
-	}
-
-const char *omx_error_to_string(const OMX_ERRORTYPE error) {
-	switch (error) {
-		CASE_TO_STRING(OMX_ErrorNone);
-		CASE_TO_STRING(OMX_ErrorInsufficientResources);
-		CASE_TO_STRING(OMX_ErrorUndefined);
-		CASE_TO_STRING(OMX_ErrorInvalidComponentName);
-		CASE_TO_STRING(OMX_ErrorComponentNotFound);
-		CASE_TO_STRING(OMX_ErrorInvalidComponent);
-		CASE_TO_STRING(OMX_ErrorBadParameter);
-		CASE_TO_STRING(OMX_ErrorNotImplemented);
-		CASE_TO_STRING(OMX_ErrorUnderflow);
-		CASE_TO_STRING(OMX_ErrorOverflow);
-		CASE_TO_STRING(OMX_ErrorHardware);
-		CASE_TO_STRING(OMX_ErrorInvalidState);
-		CASE_TO_STRING(OMX_ErrorStreamCorrupt);
-		CASE_TO_STRING(OMX_ErrorPortsNotCompatible);
-		CASE_TO_STRING(OMX_ErrorResourcesLost);
-		CASE_TO_STRING(OMX_ErrorNoMore);
-		CASE_TO_STRING(OMX_ErrorVersionMismatch);
-		CASE_TO_STRING(OMX_ErrorNotReady);
-		CASE_TO_STRING(OMX_ErrorTimeout);
-		CASE_TO_STRING(OMX_ErrorSameState);
-		CASE_TO_STRING(OMX_ErrorResourcesPreempted);
-		CASE_TO_STRING(OMX_ErrorPortUnresponsiveDuringAllocation);
-		CASE_TO_STRING(OMX_ErrorPortUnresponsiveDuringDeallocation);
-		CASE_TO_STRING(OMX_ErrorPortUnresponsiveDuringStop);
-		CASE_TO_STRING(OMX_ErrorIncorrectStateTransition);
-		default: return "Unknown OMX error";
-	}
-}
-
-const char *omx_state_to_string(const OMX_STATETYPE state) {
-	switch (state) {
-		CASE_TO_STRING(OMX_StateLoaded);
-		CASE_TO_STRING(OMX_StateIdle);
-		CASE_TO_STRING(OMX_StateExecuting);
-		CASE_ASSERT("Unsupported OMX state", state);
-	}
-}
-
-#undef CASE_ASSERT
-#undef CASE_TO_STRING

src/stream.c

@@ -1,565 +0,0 @@
-/*****************************************************************************
-#    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
-#                                                                            #
-#    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
-#                                                                            #
-#    This program is free software: you can redistribute it and/or modify    #
-#    it under the terms of the GNU General Public License as published by    #
-#    the Free Software Foundation, either version 3 of the License, or       #
-#    (at your option) any later version.                                     #
-#                                                                            #
-#    This program is distributed in the hope that it will be useful,         #
-#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
-#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
-#    GNU General Public License for more details.                            #
-#                                                                            #
-#    You should have received a copy of the GNU General Public License       #
-#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
-#                                                                            #
-*****************************************************************************/
-
-
-#include <errno.h>
-#include <time.h>
-#include <assert.h>
-
-#include <pthread.h>
-
-#include <sys/select.h>
-#include <linux/videodev2.h>
-
-#include "tools.h"
-#include "logging.h"
-#include "xioctl.h"
-#include "device.h"
-#include "encoder.h"
-#include "stream.h"
-
-#include "jpeg/encoder.h"
-
-
-static long double _stream_get_fluency_delay(struct device_t *dev, struct workers_pool_t *pool);
-static void _stream_expose_picture(struct stream_t *stream, unsigned buf_index);
-
-static int _stream_init_loop(struct device_t *dev, struct workers_pool_t *pool);
-static int _stream_init(struct device_t *dev, struct workers_pool_t *pool);
-
-static void _stream_init_workers(struct device_t *dev, struct workers_pool_t *pool);
-static void *_stream_worker_thread(void *v_ctx);
-static void _stream_destroy_workers(struct device_t *dev, struct workers_pool_t *pool);
-
-static int _stream_control(struct device_t *dev, const bool enable);
-static int _stream_grab_buffer(struct device_t *dev, struct v4l2_buffer *buf_info);
-static int _stream_release_buffer(struct device_t *dev, struct v4l2_buffer *buf_info);
-static int _stream_handle_event(struct device_t *dev);
-
-
-struct stream_t *stream_init(struct device_t *dev, struct encoder_t *encoder) {
-	struct stream_t *stream;
-
-	A_CALLOC(stream, 1);
-	stream->dev = dev;
-	stream->encoder = encoder;
-	A_PTHREAD_M_INIT(&stream->mutex);
-	return stream;
-}
-
-void stream_destroy(struct stream_t *stream) {
-	A_PTHREAD_M_DESTROY(&stream->mutex);
-	free(stream);
-}
-
-void stream_loop(struct stream_t *stream) {
-	struct workers_pool_t pool;
-	bool workers_stop;
-
-	MEMSET_ZERO(pool);
-	pool.encoder = stream->encoder;
-	pool.workers_stop = &workers_stop;
-
-	LOG_INFO("Using V4L2 device: %s", stream->dev->path);
-
-	while (_stream_init_loop(stream->dev, &pool) == 0) {
-		struct worker_t *oldest_worker = NULL;
-		struct worker_t *last_worker = NULL;
-		unsigned frames_count = 0;
-		long double grab_after = 0;
-		unsigned fluency_passed = 0;
-		unsigned captured_fps_accum = 0;
-		long long captured_fps_second = 0;
-		bool persistent_timeout_reported = false;
-
-		LOG_DEBUG("Allocation memory for stream picture ...");
-		A_CALLOC(stream->picture.data, stream->dev->run->max_picture_size);
-
-		LOG_INFO("Capturing ...");
-
-		while (!stream->dev->stop) {
-			int free_worker_number = -1;
-
-			SEP_DEBUG('-');
-
-			LOG_DEBUG("Waiting for workers ...");
-			A_PTHREAD_M_LOCK(&pool.free_workers_mutex);
-			A_PTHREAD_C_WAIT_TRUE(pool.free_workers, &pool.free_workers_cond, &pool.free_workers_mutex);
-			A_PTHREAD_M_UNLOCK(&pool.free_workers_mutex);
-
-			if (oldest_worker && !oldest_worker->has_job && oldest_worker->ctx.buf_index >= 0) {
-				if (oldest_worker->job_failed) {
-					break;
-				}
-
-				_stream_expose_picture(stream, oldest_worker->ctx.buf_index);
-
-				free_worker_number = oldest_worker->ctx.number;
-				oldest_worker = oldest_worker->order_next;
-
-				LOG_PERF("##### Raw frame accepted; worker = %u", free_worker_number);
-			} else {
-				for (unsigned number = 0; number < stream->dev->n_workers; ++number) {
-					if (!pool.workers[number].has_job && (free_worker_number == -1
-						|| pool.workers[free_worker_number].job_start_time < pool.workers[number].job_start_time
-					)) {
-						free_worker_number = number;
-						break;
-					}
-				}
-
-				assert(free_worker_number >= 0);
-				assert(!pool.workers[free_worker_number].has_job);
-
-				LOG_PERF("----- Raw frame dropped;  worker = %u", free_worker_number);
-			}
-
-			if (stream->dev->stop) {
-				break;
-			}
-
-#	define INIT_FD_SET(_set) \
-		fd_set _set; FD_ZERO(&_set); FD_SET(stream->dev->run->fd, &_set);
-			INIT_FD_SET(read_fds);
-			INIT_FD_SET(write_fds);
-			INIT_FD_SET(error_fds);
-#	undef INIT_FD_SET
-
-			struct timeval timeout;
-			timeout.tv_sec = stream->dev->timeout;
-			timeout.tv_usec = 0;
-
-			LOG_DEBUG("Calling select() on video device ...");
-			int retval = select(stream->dev->run->fd + 1, &read_fds, &write_fds, &error_fds, &timeout);
-			LOG_DEBUG("Device select() --> %d", retval);
-
-			if (retval < 0) {
-				if (errno != EINTR) {
-					LOG_PERROR("Mainloop select() error");
-					break;
-				}
-
-			} else if (retval == 0) {
-				if (stream->dev->persistent) {
-					if (!persistent_timeout_reported) {
-						LOG_ERROR("Mainloop select() timeout, polling ...")
-						persistent_timeout_reported = true;
-					}
-					continue;
-				} else {
-					LOG_ERROR("Mainloop select() timeout");
-					break;
-				}
-
-			} else {
-				persistent_timeout_reported = false;
-
-				if (FD_ISSET(stream->dev->run->fd, &read_fds)) {
-					LOG_DEBUG("Frame is ready");
-
-					struct v4l2_buffer buf_info;
-					long double now = get_now_monotonic();
-					long long now_second = floor_ms(now);
-
-					if (_stream_grab_buffer(stream->dev, &buf_info) < 0) {
-						break;
-					}
-					stream->dev->run->pictures[buf_info.index].grab_time = now;
-
-					if (stream->dev->every_frame) {
-						if (frames_count < stream->dev->every_frame - 1) {
-							frames_count += 1;
-							LOG_DEBUG("Dropping frame %d for option --every-frame=%d", frames_count, stream->dev->every_frame);
-							goto pass_frame;
-						}
-						frames_count = 0;
-					}
-
-					// Workaround for broken, corrupted frames:
-					// Under low light conditions corrupted frames may get captured.
-					// The good thing is such frames are quite small compared to the regular pictures.
-					// For example a VGA (640x480) webcam picture is normally >= 8kByte large,
-					// corrupted frames are smaller.
-					if (buf_info.bytesused < stream->dev->min_frame_size) {
-						LOG_DEBUG("Dropping too small frame sized %d bytes, assuming it as broken", buf_info.bytesused);
-						goto pass_frame;
-					}
-
-					{
-						if (now < grab_after) {
-							fluency_passed += 1;
-							LOG_VERBOSE("Passed %u frames for fluency: now=%.03Lf; grab_after=%.03Lf", fluency_passed, now, grab_after);
-							goto pass_frame;
-						}
-						fluency_passed = 0;
-
-						if (now_second != captured_fps_second) {
-							stream->captured_fps = captured_fps_accum;
-							captured_fps_accum = 0;
-							captured_fps_second = now_second;
-							LOG_PERF("Oldest worker complete, Captured-FPS = %u", stream->captured_fps);
-						}
-						captured_fps_accum += 1;
-
-						long double fluency_delay = _stream_get_fluency_delay(stream->dev, &pool);
-
-						grab_after = now + fluency_delay;
-						LOG_VERBOSE("Fluency: delay=%.03Lf; grab_after=%.03Lf", fluency_delay, grab_after);
-					}
-
-					LOG_DEBUG("Grabbed a new frame to buffer %d", buf_info.index);
-					pool.workers[free_worker_number].ctx.buf_info = buf_info;
-
-					if (!oldest_worker) {
-						oldest_worker = &pool.workers[free_worker_number];
-						last_worker = oldest_worker;
-					} else {
-						if (pool.workers[free_worker_number].order_next) {
-							pool.workers[free_worker_number].order_next->order_prev = pool.workers[free_worker_number].order_prev;
-						}
-						if (pool.workers[free_worker_number].order_prev) {
-							pool.workers[free_worker_number].order_prev->order_next = pool.workers[free_worker_number].order_next;
-						}
-						pool.workers[free_worker_number].order_prev = last_worker;
-						last_worker->order_next = &pool.workers[free_worker_number];
-						last_worker = &pool.workers[free_worker_number];
-					}
-					last_worker->order_next = NULL;
-
-					A_PTHREAD_M_LOCK(&pool.workers[free_worker_number].has_job_mutex);
-					pool.workers[free_worker_number].ctx.buf_index = buf_info.index;
-					pool.workers[free_worker_number].has_job = true;
-					A_PTHREAD_M_UNLOCK(&pool.workers[free_worker_number].has_job_mutex);
-					A_PTHREAD_C_SIGNAL(&pool.workers[free_worker_number].has_job_cond);
-
-					A_PTHREAD_M_LOCK(&pool.free_workers_mutex);
-					pool.free_workers -= 1;
-					A_PTHREAD_M_UNLOCK(&pool.free_workers_mutex);
-
-					goto next_handlers; // Поток сам освободит буфер
-
-					pass_frame:
-
-					if (_stream_release_buffer(stream->dev, &buf_info) < 0) {
-						break;
-					}
-				}
-
-				next_handlers:
-
-				if (FD_ISSET(stream->dev->run->fd, &write_fds)) {
-					LOG_ERROR("Got unexpected writing event, seems device was disconnected");
-					break;
-				}
-
-				if (FD_ISSET(stream->dev->run->fd, &error_fds)) {
-					LOG_INFO("Got V4L2 event");
-					if (_stream_handle_event(stream->dev) < 0) {
-						break;
-					}
-				}
-			}
-		}
-
-		A_PTHREAD_M_LOCK(&stream->mutex);
-		stream->picture.size = 0; // On stream offline
-		free(stream->picture.data);
-		stream->width = 0;
-		stream->height = 0;
-		stream->updated = true;
-		A_PTHREAD_M_UNLOCK(&stream->mutex);
-	}
-
-	_stream_destroy_workers(stream->dev, &pool);
-	_stream_control(stream->dev, false);
-	device_close(stream->dev);
-}
-
-void stream_loop_break(struct stream_t *stream) {
-	stream->dev->stop = 1;
-}
-
-static void _stream_expose_picture(struct stream_t *stream, unsigned buf_index) {
-#	define PICTURE(_next) stream->dev->run->pictures[buf_index]._next
-
-	A_PTHREAD_M_LOCK(&stream->mutex);
-
-	stream->picture.size = PICTURE(size);
-	stream->picture.allocated = PICTURE(allocated);
-	memcpy(
-		stream->picture.data, PICTURE(data),
-		stream->picture.size * sizeof(*stream->picture.data)
-	);
-	stream->picture.grab_time = PICTURE(grab_time);
-	stream->picture.encode_begin_time = PICTURE(encode_begin_time);
-	stream->picture.encode_end_time = PICTURE(encode_end_time);
-
-	stream->width = stream->dev->run->width;
-	stream->height = stream->dev->run->height;
-	stream->updated = true;
-
-	A_PTHREAD_M_UNLOCK(&stream->mutex);
-
-#	undef PICTURE
-}
-
-static long double _stream_get_fluency_delay(struct device_t *dev, struct workers_pool_t *pool) {
-	long double comp_time = 0;
-	long double min_delay;
-	long double soft_delay;
-
-	for (unsigned number = 0; number < dev->n_workers; ++number) {
-		A_PTHREAD_M_LOCK(&pool->workers[number].last_comp_time_mutex);
-		if (pool->workers[number].last_comp_time > 0) {
-			comp_time += pool->workers[number].last_comp_time;
-		}
-		A_PTHREAD_M_UNLOCK(&pool->workers[number].last_comp_time_mutex);
-	}
-	comp_time = comp_time / dev->n_workers; // Среднее время работы воркеров
-
-	min_delay = comp_time / dev->n_workers; // Минимальное время работы размазывается на N воркеров
-	soft_delay = ((long double)1) / dev->soft_fps; // Искусственное время задержки на основе желаемого FPS
-
-	if (min_delay > 0) {
-		return (min_delay > soft_delay ? min_delay : soft_delay);
-	}
-	return min_delay;
-}
-
-static int _stream_init_loop(struct device_t *dev, struct workers_pool_t *pool) {
-	int retval = -1;
-
-	LOG_DEBUG("%s: *dev->stop = %d", __FUNCTION__, dev->stop);
-	while (!dev->stop) {
-		if ((retval = _stream_init(dev, pool)) < 0) {
-			LOG_INFO("Sleeping %d seconds before new stream init ...", dev->error_delay);
-			sleep(dev->error_delay);
-		} else {
-			break;
-		}
-	}
-	return retval;
-}
-
-static int _stream_init(struct device_t *dev, struct workers_pool_t *pool) {
-	SEP_INFO('=');
-
-	_stream_destroy_workers(dev, pool);
-	_stream_control(dev, false);
-	device_close(dev);
-
-	if (device_open(dev) < 0) {
-		goto error;
-	}
-	if (_stream_control(dev, true) < 0) {
-		goto error;
-	}
-
-	encoder_prepare_live(pool->encoder, dev);
-
-	_stream_init_workers(dev, pool);
-
-	return 0;
-
-	error:
-		device_close(dev);
-		return -1;
-}
-
-static void _stream_init_workers(struct device_t *dev, struct workers_pool_t *pool) {
-	LOG_INFO("Spawning %d workers ...", dev->n_workers);
-
-	*pool->workers_stop = false;
-	A_CALLOC(pool->workers, dev->n_workers);
-
-	A_PTHREAD_M_INIT(&pool->free_workers_mutex);
-	A_PTHREAD_C_INIT(&pool->free_workers_cond);
-
-	for (unsigned number = 0; number < dev->n_workers; ++number) {
-		pool->free_workers += 1;
-
-		A_PTHREAD_M_INIT(&pool->workers[number].has_job_mutex);
-		A_PTHREAD_C_INIT(&pool->workers[number].has_job_cond);
-
-#	define CTX(_next) pool->workers[number].ctx._next
-
-		CTX(number)			= number;
-		CTX(dev)			= dev;
-		CTX(dev_stop)		= (sig_atomic_t *volatile)&dev->stop;
-		CTX(workers_stop)	= pool->workers_stop;
-
-		CTX(encoder) = pool->encoder;
-
-		CTX(last_comp_time_mutex)	= &pool->workers[number].last_comp_time_mutex;
-		CTX(last_comp_time)			= &pool->workers[number].last_comp_time;
-
-		CTX(has_job_mutex)	= &pool->workers[number].has_job_mutex;
-		CTX(has_job)		= &pool->workers[number].has_job;
-		CTX(job_failed)		= &pool->workers[number].job_failed;
-		CTX(job_start_time)	= &pool->workers[number].job_start_time;
-		CTX(has_job_cond)	= &pool->workers[number].has_job_cond;
-
-		CTX(free_workers_mutex)	= &pool->free_workers_mutex;
-		CTX(free_workers)		= &pool->free_workers;
-		CTX(free_workers_cond)	= &pool->free_workers_cond;
-
-#	undef CTX
-
-		A_PTHREAD_CREATE(&pool->workers[number].tid, _stream_worker_thread, (void *)&pool->workers[number].ctx);
-	}
-}
-
-static void *_stream_worker_thread(void *v_ctx) {
-	struct worker_context_t *ctx = (struct worker_context_t *)v_ctx;
-
-	LOG_DEBUG("Hello! I am a worker #%u ^_^", ctx->number);
-
-	while (!*ctx->dev_stop && !*ctx->workers_stop) {
-		LOG_DEBUG("Worker %u waiting for a new job ...", ctx->number);
-		A_PTHREAD_M_LOCK(ctx->has_job_mutex);
-		A_PTHREAD_C_WAIT_TRUE(*ctx->has_job, ctx->has_job_cond, ctx->has_job_mutex);
-		A_PTHREAD_M_UNLOCK(ctx->has_job_mutex);
-
-		if (!*ctx->workers_stop) {
-			LOG_DEBUG("Worker %u compressing JPEG from buffer %d ...", ctx->number, ctx->buf_index);
-
-			if (encoder_compress_buffer(ctx->encoder, ctx->dev, ctx->number, ctx->buf_index) < 0) {
-				*ctx->job_failed = true;
-			}
-
-			if (_stream_release_buffer(ctx->dev, &ctx->buf_info) == 0) {
-				*ctx->job_start_time = ctx->dev->run->pictures[ctx->buf_index].encode_begin_time;
-				*ctx->has_job = false;
-
-				long double last_comp_time = ctx->dev->run->pictures[ctx->buf_index].encode_end_time - *ctx->job_start_time;
-
-				A_PTHREAD_M_LOCK(ctx->last_comp_time_mutex);
-				*ctx->last_comp_time = last_comp_time;
-				A_PTHREAD_M_UNLOCK(ctx->last_comp_time_mutex);
-
-				LOG_VERBOSE(
-					"Compressed JPEG size=%ld; time=%0.3Lf; worker=%u; buffer=%d",
-					ctx->dev->run->pictures[ctx->buf_index].size, last_comp_time, ctx->number, ctx->buf_index
-				);
-			} else {
-				*ctx->job_failed = true;
-				*ctx->has_job = false;
-			}
-		}
-
-		A_PTHREAD_M_LOCK(ctx->free_workers_mutex);
-		*ctx->free_workers += 1;
-		A_PTHREAD_M_UNLOCK(ctx->free_workers_mutex);
-		A_PTHREAD_C_SIGNAL(ctx->free_workers_cond);
-	}
-
-	LOG_DEBUG("Bye-bye (worker %d)", ctx->number);
-	return NULL;
-}
-
-static void _stream_destroy_workers(struct device_t *dev, struct workers_pool_t *pool) {
-	if (pool->workers) {
-		LOG_INFO("Destroying workers ...");
-
-		*pool->workers_stop = true;
-		for (unsigned number = 0; number < dev->n_workers; ++number) {
-			A_PTHREAD_M_LOCK(&pool->workers[number].has_job_mutex);
-			pool->workers[number].has_job = true; // Final job: die
-			A_PTHREAD_M_UNLOCK(&pool->workers[number].has_job_mutex);
-			A_PTHREAD_C_SIGNAL(&pool->workers[number].has_job_cond);
-
-			A_PTHREAD_JOIN(pool->workers[number].tid);
-			A_PTHREAD_M_DESTROY(&pool->workers[number].has_job_mutex);
-			A_PTHREAD_C_DESTROY(&pool->workers[number].has_job_cond);
-		}
-
-		A_PTHREAD_M_DESTROY(&pool->free_workers_mutex);
-		A_PTHREAD_C_DESTROY(&pool->free_workers_cond);
-
-		free(pool->workers);
-	}
-	pool->free_workers = 0;
-	pool->workers = NULL;
-}
-
-static int _stream_control(struct device_t *dev, const bool enable) {
-	if (enable != dev->run->capturing) {
-		enum v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-
-		LOG_DEBUG("Calling ioctl(%s) ...", (enable ? "VIDIOC_STREAMON" : "VIDIOC_STREAMOFF"));
-		if (xioctl(dev->run->fd, (enable ? VIDIOC_STREAMON : VIDIOC_STREAMOFF), &type) < 0) {
-			LOG_PERROR("Unable to %s capturing", (enable ? "start" : "stop"));
-			if (enable) {
-				return -1;
-			}
-		}
-
-		dev->run->capturing = enable;
-		LOG_INFO("Capturing %s", (enable ? "started" : "stopped"));
-	}
-    return 0;
-}
-
-static int _stream_grab_buffer(struct device_t *dev, struct v4l2_buffer *buf_info) {
-	MEMSET_ZERO_PTR(buf_info);
-	buf_info->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-	buf_info->memory = V4L2_MEMORY_MMAP;
-
-	LOG_DEBUG("Calling ioctl(VIDIOC_DQBUF) ...");
-	if (xioctl(dev->run->fd, VIDIOC_DQBUF, buf_info) < 0) {
-		LOG_PERROR("Unable to dequeue buffer");
-		return -1;
-	}
-
-	LOG_DEBUG("Got a new frame in buffer index=%d; bytesused=%d", buf_info->index, buf_info->bytesused);
-	if (buf_info->index >= dev->run->n_buffers) {
-		LOG_ERROR("Got invalid buffer index=%d; nbuffers=%d", buf_info->index, dev->run->n_buffers);
-		return -1;
-	}
-	return 0;
-}
-
-static int _stream_release_buffer(struct device_t *dev, struct v4l2_buffer *buf_info) {
-	LOG_DEBUG("Calling ioctl(VIDIOC_QBUF) ...");
-	if (xioctl(dev->run->fd, VIDIOC_QBUF, buf_info) < 0) {
-		LOG_PERROR("Unable to requeue buffer");
-		return -1;
-	}
-	return 0;
-}
-
-static int _stream_handle_event(struct device_t *dev) {
-	struct v4l2_event event;
-
-	LOG_DEBUG("Calling ioctl(VIDIOC_DQEVENT) ...");
-	if (!xioctl(dev->run->fd, VIDIOC_DQEVENT, &event)) {
-		switch (event.type) {
-			case V4L2_EVENT_SOURCE_CHANGE:
-				LOG_INFO("Got V4L2_EVENT_SOURCE_CHANGE: source changed");
-				return -1;
-			case V4L2_EVENT_EOS:
-				LOG_INFO("Got V4L2_EVENT_EOS: end of stream (ignored)");
-				return 0;
-		}
-	} else {
-		LOG_PERROR("Got some V4L2 device event, but where is it? ");
-	}
-	return 0;
-}

src/stream.h

@@ -1,101 +0,0 @@
-/*****************************************************************************
-#    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
-#                                                                            #
-#    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
-#                                                                            #
-#    This program is free software: you can redistribute it and/or modify    #
-#    it under the terms of the GNU General Public License as published by    #
-#    the Free Software Foundation, either version 3 of the License, or       #
-#    (at your option) any later version.                                     #
-#                                                                            #
-#    This program is distributed in the hope that it will be useful,         #
-#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
-#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
-#    GNU General Public License for more details.                            #
-#                                                                            #
-#    You should have received a copy of the GNU General Public License       #
-#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
-#                                                                            #
-*****************************************************************************/
-
-
-#pragma once
-
-#include <stdbool.h>
-#include <signal.h>
-
-#include <pthread.h>
-
-#include "device.h"
-#include "encoder.h"
-
-
-struct worker_context_t {
-	unsigned			number;
-	struct device_t		*dev;
-	int					buf_index;
-	struct v4l2_buffer	buf_info;
-	sig_atomic_t		*volatile dev_stop;
-	bool				*workers_stop;
-
-	struct encoder_t	*encoder;
-
-	pthread_mutex_t		*last_comp_time_mutex;
-	long double			*last_comp_time;
-
-	pthread_mutex_t		*has_job_mutex;
-	bool				*has_job;
-	bool				*job_failed;
-	long double			*job_start_time;
-	pthread_cond_t		*has_job_cond;
-
-	pthread_mutex_t		*free_workers_mutex;
-	unsigned			*free_workers;
-	pthread_cond_t		*free_workers_cond;
-};
-
-struct worker_t {
-	struct worker_context_t	ctx;
-	pthread_t				tid;
-
-	pthread_mutex_t			last_comp_time_mutex;
-	long double				last_comp_time;
-
-	pthread_mutex_t			has_job_mutex;
-	bool					has_job;
-	bool					job_failed;
-	long double				job_start_time;
-	pthread_cond_t			has_job_cond;
-
-	struct worker_t			*order_prev;
-	struct worker_t			*order_next;
-};
-
-struct workers_pool_t {
-	struct worker_t		*workers;
-	bool				*workers_stop;
-
-	pthread_mutex_t		free_workers_mutex;
-	unsigned			free_workers;
-	pthread_cond_t		free_workers_cond;
-
-	struct encoder_t	*encoder;
-};
-
-struct stream_t {
-	struct picture_t	picture;
-	unsigned			width;
-	unsigned			height;
-	unsigned			captured_fps;
-	bool				updated;
-	pthread_mutex_t		mutex;
-	struct device_t		*dev;
-	struct encoder_t	*encoder;
-};
-
-
-struct stream_t *stream_init(struct device_t *dev, struct encoder_t *encoder);
-void stream_destroy(struct stream_t *stream);
-
-void stream_loop(struct stream_t *stream);
-void stream_loop_break(struct stream_t *stream);

src/tools.h

@@ -1,100 +0,0 @@
-/*****************************************************************************
-#    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
-#                                                                            #
-#    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
-#                                                                            #
-#    This program is free software: you can redistribute it and/or modify    #
-#    it under the terms of the GNU General Public License as published by    #
-#    the Free Software Foundation, either version 3 of the License, or       #
-#    (at your option) any later version.                                     #
-#                                                                            #
-#    This program is distributed in the hope that it will be useful,         #
-#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
-#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
-#    GNU General Public License for more details.                            #
-#                                                                            #
-#    You should have received a copy of the GNU General Public License       #
-#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
-#                                                                            #
-*****************************************************************************/
-
-
-#pragma once
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdbool.h>
-#include <errno.h>
-#include <math.h>
-#include <pthread.h>
-#include <time.h>
-#include <assert.h>
-
-#include <sys/ioctl.h>
-#include <sys/syscall.h>
-
-
-#define A_PTHREAD_CREATE(_tid, _func, _arg)	assert(!pthread_create(_tid, NULL, _func, _arg))
-#define A_PTHREAD_JOIN(_tid)				assert(!pthread_join(_tid, NULL))
-
-#define A_PTHREAD_M_INIT(_mutex)	assert(!pthread_mutex_init(_mutex, NULL))
-#define A_PTHREAD_M_DESTROY(_mutex)	assert(!pthread_mutex_destroy(_mutex))
-#define A_PTHREAD_M_LOCK(_mutex)	assert(!pthread_mutex_lock(_mutex))
-#define A_PTHREAD_M_UNLOCK(_mutex)	assert(!pthread_mutex_unlock(_mutex))
-
-#define A_PTHREAD_C_INIT(_cond)		assert(!pthread_cond_init(_cond, NULL))
-#define A_PTHREAD_C_DESTROY(_cond)	assert(!pthread_cond_destroy(_cond))
-#define A_PTHREAD_C_SIGNAL(...)		assert(!pthread_cond_signal(__VA_ARGS__))
-#define A_PTHREAD_C_WAIT_TRUE(_var, _cond, _mutex) { while(!_var) assert(!pthread_cond_wait(_cond, _mutex)); }
-
-
-#define A_CALLOC(_dest, _nmemb)		assert((_dest = calloc(_nmemb, sizeof(*(_dest)))))
-#define A_REALLOC(_dest, _nmemb)	assert((_dest = realloc(_dest, _nmemb * sizeof(*(_dest)))))
-#define MEMSET_ZERO(_obj)			memset(&(_obj), 0, sizeof(_obj))
-#define MEMSET_ZERO_PTR(_ptr)		memset(_ptr, 0, sizeof(*(_ptr)))
-
-
-#define INLINE inline __attribute__((always_inline))
-#define UNUSED __attribute__((unused))
-
-
-INLINE char *bool_to_string(const bool flag) {
-	return (flag ? "true" : "false");
-}
-
-INLINE unsigned max_u(unsigned a, unsigned b) {
-	return (a > b ? a : b);
-}
-
-INLINE long long floor_ms(long double now) {
-	return (long long) now - (now < (long long) now); // floor()
-}
-
-INLINE void get_now(clockid_t clk_id, time_t *sec, long *msec) {
-	struct timespec spec;
-
-	assert(!clock_gettime(clk_id, &spec));
-	*sec = spec.tv_sec;
-	*msec = round(spec.tv_nsec / 1.0e6);
-
-	if (*msec > 999) {
-		*sec += 1;
-		*msec = 0;
-	}
-}
-
-INLINE long double get_now_monotonic(void) {
-	time_t sec;
-	long msec;
-
-	get_now(CLOCK_MONOTONIC_RAW, &sec, &msec);
-	return (long double)sec + ((long double)msec) / 1000;
-}
-
-INLINE long double get_now_real(void) {
-	time_t sec;
-	long msec;
-
-	get_now(CLOCK_REALTIME, &sec, &msec);
-	return (long double)sec + ((long double)msec) / 1000;
-}

src/ustreamer/blank.c

@@ -0,0 +1,107 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#include "blank.h"
+
+
+static frame_s *_init_internal(void);
+static frame_s *_init_external(const char *path);
+
+
+frame_s *blank_frame_init(const char *path) {
+	frame_s *blank = NULL;
+
+	if (path && path[0] != '\0') {
+		blank = _init_external(path);
+	}
+
+	if (blank) {
+		LOG_INFO("Using external blank placeholder: %s", path);
+	} else {
+		blank = _init_internal();
+		LOG_INFO("Using internal blank placeholder");
+	}
+	return blank;
+}
+
+static frame_s *_init_internal(void) {
+	frame_s *blank = frame_init();
+	frame_set_data(blank, BLANK_JPEG_DATA, BLANK_JPEG_DATA_SIZE);
+	blank->width = BLANK_JPEG_WIDTH;
+	blank->height = BLANK_JPEG_HEIGHT;
+	blank->format = V4L2_PIX_FMT_JPEG;
+	return blank;
+}
+
+static frame_s *_init_external(const char *path) {
+	FILE *fp = NULL;
+
+	frame_s *blank = frame_init();
+	blank->format = V4L2_PIX_FMT_JPEG;
+
+	if ((fp = fopen(path, "rb")) == NULL) {
+		LOG_PERROR("Can't open blank placeholder '%s'", path);
+		goto error;
+	}
+
+#	define CHUNK_SIZE ((size_t)(100 * 1024))
+	while (true) {
+		if (blank->used + CHUNK_SIZE >= blank->allocated) {
+			frame_realloc_data(blank, blank->used + CHUNK_SIZE * 2);
+		}
+
+		size_t readed = fread(blank->data + blank->used, 1, CHUNK_SIZE, fp);
+		blank->used += readed;
+
+		if (readed < CHUNK_SIZE) {
+			if (feof(fp)) {
+				break;
+			} else {
+				LOG_PERROR("Can't read blank placeholder");
+				goto error;
+			}
+		}
+	}
+#	undef CHUNK_SIZE
+
+	frame_s *decoded = frame_init();
+	if (unjpeg(blank, decoded, false) < 0) {
+		frame_destroy(decoded);
+		goto error;
+	}
+	blank->width = decoded->width;
+	blank->height = decoded->height;
+	frame_destroy(decoded);
+
+	goto ok;
+
+	error:
+		frame_destroy(blank);
+		blank = NULL;
+
+	ok:
+		if (fp) {
+			fclose(fp);
+		}
+
+	return blank;
+}

src/ustreamer/blank.h

@@ -0,0 +1,38 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#pragma once
+
+#include <stdio.h>
+#include <stdbool.h>
+
+#include <linux/videodev2.h>
+
+#include "../libs/tools.h"
+#include "../libs/logging.h"
+#include "../libs/frame.h"
+#include "../libs/unjpeg.h"
+
+#include "data/blank_jpeg.h"
+
+
+frame_s *blank_frame_init(const char *path);

src/ustreamer/data/blank_jpeg.c

@@ -0,0 +1,723 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+#include "blank_jpeg.h"
+
+
+const unsigned BLANK_JPEG_WIDTH = 640;
+const unsigned BLANK_JPEG_HEIGHT = 480;
+
+const size_t BLANK_JPEG_DATA_SIZE = 13845;
+const uint8_t BLANK_JPEG_DATA[] = {
+	0xFF, 0xD8, 0xFF, 0xE1, 0x09, 0x50, 0x68, 0x74, 0x74, 0x70, 0x3A, 0x2F, 0x2F, 0x6E, 0x73, 0x2E, 0x61, 0x64, 0x6F, 0x62,
+	0x65, 0x2E, 0x63, 0x6F, 0x6D, 0x2F, 0x78, 0x61, 0x70, 0x2F, 0x31, 0x2E, 0x30, 0x2F, 0x00, 0x3C, 0x3F, 0x78, 0x70, 0x61,
+	0x63, 0x6B, 0x65, 0x74, 0x20, 0x62, 0x65, 0x67, 0x69, 0x6E, 0x3D, 0x22, 0xEF, 0xBB, 0xBF, 0x22, 0x20, 0x69, 0x64, 0x3D,
+	0x22, 0x57, 0x35, 0x4D, 0x30, 0x4D, 0x70, 0x43, 0x65, 0x68, 0x69, 0x48, 0x7A, 0x72, 0x65, 0x53, 0x7A, 0x4E, 0x54, 0x63,
+	0x7A, 0x6B, 0x63, 0x39, 0x64, 0x22, 0x3F, 0x3E, 0x20, 0x3C, 0x78, 0x3A, 0x78, 0x6D, 0x70, 0x6D, 0x65, 0x74, 0x61, 0x20,
+	0x78, 0x6D, 0x6C, 0x6E, 0x73, 0x3A, 0x78, 0x3D, 0x22, 0x61, 0x64, 0x6F, 0x62, 0x65, 0x3A, 0x6E, 0x73, 0x3A, 0x6D, 0x65,
+	0x74, 0x61, 0x2F, 0x22, 0x20, 0x78, 0x3A, 0x78, 0x6D, 0x70, 0x74, 0x6B, 0x3D, 0x22, 0x41, 0x64, 0x6F, 0x62, 0x65, 0x20,
+	0x58, 0x4D, 0x50, 0x20, 0x43, 0x6F, 0x72, 0x65, 0x20, 0x35, 0x2E, 0x36, 0x2D, 0x63, 0x31, 0x33, 0x38, 0x20, 0x37, 0x39,
+	0x2E, 0x31, 0x35, 0x39, 0x38, 0x32, 0x34, 0x2C, 0x20, 0x32, 0x30, 0x31, 0x36, 0x2F, 0x30, 0x39, 0x2F, 0x31, 0x34, 0x2D,
+	0x30, 0x31, 0x3A, 0x30, 0x39, 0x3A, 0x30, 0x31, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x22, 0x3E, 0x20, 0x3C,
+	0x72, 0x64, 0x66, 0x3A, 0x52, 0x44, 0x46, 0x20, 0x78, 0x6D, 0x6C, 0x6E, 0x73, 0x3A, 0x72, 0x64, 0x66, 0x3D, 0x22, 0x68,
+	0x74, 0x74, 0x70, 0x3A, 0x2F, 0x2F, 0x77, 0x77, 0x77, 0x2E, 0x77, 0x33, 0x2E, 0x6F, 0x72, 0x67, 0x2F, 0x31, 0x39, 0x39,
+	0x39, 0x2F, 0x30, 0x32, 0x2F, 0x32, 0x32, 0x2D, 0x72, 0x64, 0x66, 0x2D, 0x73, 0x79, 0x6E, 0x74, 0x61, 0x78, 0x2D, 0x6E,
+	0x73, 0x23, 0x22, 0x3E, 0x20, 0x3C, 0x72, 0x64, 0x66, 0x3A, 0x44, 0x65, 0x73, 0x63, 0x72, 0x69, 0x70, 0x74, 0x69, 0x6F,
+	0x6E, 0x20, 0x72, 0x64, 0x66, 0x3A, 0x61, 0x62, 0x6F, 0x75, 0x74, 0x3D, 0x22, 0x22, 0x2F, 0x3E, 0x20, 0x3C, 0x2F, 0x72,
+	0x64, 0x66, 0x3A, 0x52, 0x44, 0x46, 0x3E, 0x20, 0x3C, 0x2F, 0x78, 0x3A, 0x78, 0x6D, 0x70, 0x6D, 0x65, 0x74, 0x61, 0x3E,
+	0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+	0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+	0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+	0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+	0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+	0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+	0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+	0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+	0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+	0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+	0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+	0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+	0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+	0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+	0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+	0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+	0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+	0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+	0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+	0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+	0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+	0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+	0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+	0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+	0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+	0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+	0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+	0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0xFF,
+	0xD2, 0xAF, 0xFC, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x07, 0xFF, 0xD9,
+};

src/ustreamer/data/blank_jpeg.h

@@ -0,0 +1,34 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#pragma once
+
+#include <stdint.h>
+
+#include <sys/types.h>
+
+
+extern const unsigned BLANK_JPEG_WIDTH;
+extern const unsigned BLANK_JPEG_HEIGHT;
+
+extern const size_t BLANK_JPEG_DATA_SIZE;
+extern const uint8_t BLANK_JPEG_DATA[];

src/ustreamer/data/index.html

@@ -0,0 +1,75 @@
+<!DOCTYPE html>
+
+<html>
+<head>
+	<meta charset="utf-8" />
+	<title>uStreamer</title>
+	<style>body {font-family: monospace;}</style>
+</head>
+
+<body>
+	<h3>&micro;Streamer v%VERSION%</h3>
+	<hr>
+	<ul>
+		<li>
+			<a href="state"><b>/state</b></a><br>
+			Get JSON structure with the state of the server.
+		</li>
+		<br>
+		<li>
+			<a href="snapshot"><b>/snapshot</b></a><br>
+			Get a current actual image from the server.
+		</li>
+		<br>
+		<li>
+			<a href="stream"><b>/stream</b></a><br>
+			Get a live stream. Query params:<br>
+			<br>
+			<ul>
+				<li>
+					<b>key=abc123</b><br>
+					The user-defined key, which is part of cookie <i>stream_client</i>, which allows<br>
+					the stream client to determine its identifier and view statistics using <a href="state">/state</a>.
+				</li>
+				<br>
+				<li>
+					<b>extra_headers=1</b><br>
+					Add <i>X-UStreamer-*</i> headers to the <a href="stream">/stream</a> handle
+					(like with the <a href="snapshot">/snapshot</a>).
+				</li>
+				<br>
+				<li>
+					<b>advance_headers=1</b><br>
+					Enable workaround for the Chromium/Blink bug
+					<a href="https://bugs.chromium.org/p/chromium/issues/detail?id=527446">#527446</a>.
+				</li>
+				<br>
+				<li>
+					<b>dual_final_frames=1</b><br>
+					Enable workaround for the Safari/WebKit bug when using option <i>--drop-same-frames</i>.<br>
+					Without this option, when the frame series is completed, WebKit-based browsers<br>
+					renders the last frame with a delay.
+				</li>
+				<br>
+				<li>
+					<b>zero_data=1</b><br>
+					Disables the actual sending of JPEG data and leaves only response headers.
+				</li>
+			</ul>
+		</li>
+		<br>
+		<li>
+			The mjpg-streamer compatibility layer:<br>
+			<br>
+			<ul>
+				<li><a href="?action=snapshot">/?action=snapshot</a> as alias to the <a href="snapshot">/snapshot</a>.</li>
+				<br>
+				<li><a href="?action=stream">/?action=stream</a> as alias to the <a href="stream">/stream</a>.</li>
+			</ul>
+		</li>
+	</ul>
+	<br>
+	<hr>
+	<a href="https://github.com/pikvm/ustreamer">Sources &amp; docs</a>
+</body>
+</html>

src/ustreamer/data/index_html.c

@@ -1,7 +1,8 @@
 /*****************************************************************************
-#    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
 #                                                                            #
-#    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
 #                                                                            #
 #    This program is free software: you can redistribute it and/or modify    #
 #    it under the terms of the GNU General Public License as published by    #
@@ -18,19 +19,17 @@
 #                                                                            #
 *****************************************************************************/
 
-
-#pragma once
-
-#include "../config.h"
+#include "index_html.h"
 
 
-const char *HTML_INDEX_PAGE = " \
+const char *const HTML_INDEX_PAGE = " \
 	<!DOCTYPE html> \
 	\
 	<html> \
 	<head> \
 		<meta charset=\"utf-8\" /> \
 		<title>uStreamer</title> \
+		<style>body {font-family: monospace;}</style> \
 	</head> \
 	\
 	<body> \
@@ -38,44 +37,65 @@ const char *HTML_INDEX_PAGE = " \
 		<hr> \
 		<ul> \
 			<li> \
-				<a href=\"/ping\"><b><samp>/ping</samp></b></a><br> \
-				Get JSON structure with state of the server. \
+				<a href=\"state\"><b>/state</b></a><br> \
+				Get JSON structure with the state of the server. \
 			</li> \
 			<br> \
 			<li> \
-				<a href=\"/snapshot\"><b><samp>/snapshot</samp></b></a><br> \
+				<a href=\"snapshot\"><b>/snapshot</b></a><br> \
 				Get a current actual image from the server. \
 			</li> \
 			<br> \
 			<li> \
-				<a href=\"/stream\"><b><samp>/stream</samp></b></a><br> \
+				<a href=\"stream\"><b>/stream</b></a><br> \
 				Get a live stream. Query params:<br> \
 				<br> \
 				<ul> \
 					<li> \
-						<b><samp>extra_headers=1</samp></b><br> \
-						Add <samp>X-UStreamer-*</samp> headers to /stream handle (like on <a href=\"/snapshot\"><samp>/snapshot</samp></a>). \
+						<b>key=abc123</b><br> \
+						The user-defined key, which is part of cookie <i>stream_client</i>, which allows<br> \
+						the stream client to determine its identifier and view statistics using <a href=\"state\">/state</a>. \
 					</li> \
 					<br> \
 					<li> \
-						<b><samp>advance_headers=1</samp></b><br> \
-						Enable workaround for Chromium/Blink \
-						<a href=\"https://bugs.chromium.org/p/chromium/issues/detail?id=527446\">Bug #527446</a>. \
+						<b>extra_headers=1</b><br> \
+						Add <i>X-UStreamer-*</i> headers to the <a href=\"stream\">/stream</a> handle \
+						(like with the <a href=\"snapshot\">/snapshot</a>). \
 					</li> \
 					<br> \
 					<li> \
-						<b><samp>dual_final_frames=1</samp></b><br> \
-						Enable workaround for Safari/WebKit bug when using option <samp>--drop-same-frames</samp>.<br> \
+						<b>advance_headers=1</b><br> \
+						Enable workaround for the Chromium/Blink bug \
+						<a href=\"https://bugs.chromium.org/p/chromium/issues/detail?id=527446\">#527446</a>. \
+					</li> \
+					<br> \
+					<li> \
+						<b>dual_final_frames=1</b><br> \
+						Enable workaround for the Safari/WebKit bug when using option <i>--drop-same-frames</i>.<br> \
 						Without this option, when the frame series is completed, WebKit-based browsers<br> \
-						renders the last one with a delay. \
+						renders the last frame with a delay. \
+					</li> \
+					<br> \
+					<li> \
+						<b>zero_data=1</b><br> \
+						Disables the actual sending of JPEG data and leaves only response headers. \
 					</li> \
 				</ul> \
 			</li> \
 			<br> \
+			<li> \
+				The mjpg-streamer compatibility layer:<br> \
+				<br> \
+				<ul> \
+					<li><a href=\"?action=snapshot\">/?action=snapshot</a> as alias to the <a href=\"snapshot\">/snapshot</a>.</li> \
+					<br> \
+					<li><a href=\"?action=stream\">/?action=stream</a> as alias to the <a href=\"stream\">/stream</a>.</li> \
+				</ul> \
+			</li> \
 		</ul> \
 		<br> \
 		<hr> \
-		<a href=\"https://github.com/pi-kvm/ustreamer\">Sources &amp; docs</a> \
+		<a href=\"https://github.com/pikvm/ustreamer\">Sources &amp; docs</a> \
 	</body> \
 	</html> \
 ";

src/ustreamer/data/index_html.h

@@ -1,7 +1,8 @@
 /*****************************************************************************
-#    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
 #                                                                            #
-#    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
 #                                                                            #
 #    This program is free software: you can redistribute it and/or modify    #
 #    it under the terms of the GNU General Public License as published by    #
@@ -21,7 +22,9 @@
 
 #pragma once
 
-#include "../device.h"
+#include <sys/types.h>
+
+#include "../../libs/config.h"
 
 
-void jpeg_encoder_compress_buffer(struct device_t *dev, const unsigned index, const unsigned quality);
+extern const char *const HTML_INDEX_PAGE;

src/ustreamer/device.c

@@ -0,0 +1,905 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#include "device.h"
+
+
+static const struct {
+	const char *name;
+	const v4l2_std_id standard;
+} _STANDARDS[] = {
+	{"UNKNOWN",	V4L2_STD_UNKNOWN},
+	{"PAL",		V4L2_STD_PAL},
+	{"NTSC",	V4L2_STD_NTSC},
+	{"SECAM",	V4L2_STD_SECAM},
+};
+
+static const struct {
+	const char *name;
+	const unsigned format;
+} _FORMATS[] = {
+	{"YUYV",	V4L2_PIX_FMT_YUYV},
+	{"UYVY",	V4L2_PIX_FMT_UYVY},
+	{"RGB565",	V4L2_PIX_FMT_RGB565},
+	{"RGB24",	V4L2_PIX_FMT_RGB24},
+	{"MJPEG",	V4L2_PIX_FMT_MJPEG},
+	{"JPEG",	V4L2_PIX_FMT_JPEG},
+};
+
+static const struct {
+	const char *name;
+	const enum v4l2_memory io_method;
+} _IO_METHODS[] = {
+	{"MMAP",	V4L2_MEMORY_MMAP},
+	{"USERPTR",	V4L2_MEMORY_USERPTR},
+};
+
+
+static int _device_open_check_cap(device_s *dev);
+static int _device_open_dv_timings(device_s *dev);
+static int _device_apply_dv_timings(device_s *dev);
+static int _device_open_format(device_s *dev, bool first);
+static void _device_open_hw_fps(device_s *dev);
+static void _device_open_jpeg_quality(device_s *dev);
+static int _device_open_io_method(device_s *dev);
+static int _device_open_io_method_mmap(device_s *dev);
+static int _device_open_io_method_userptr(device_s *dev);
+static int _device_open_queue_buffers(device_s *dev);
+static int _device_apply_resolution(device_s *dev, unsigned width, unsigned height);
+
+static void _device_apply_controls(device_s *dev);
+static int _device_query_control(
+	device_s *dev, struct v4l2_queryctrl *query,
+	const char *name, unsigned cid, bool quiet);
+static void _device_set_control(
+	device_s *dev, struct v4l2_queryctrl *query,
+	const char *name, unsigned cid, int value, bool quiet);
+
+static const char *_format_to_string_nullable(unsigned format);
+static const char *_format_to_string_supported(unsigned format);
+static const char *_standard_to_string(v4l2_std_id standard);
+static const char *_io_method_to_string_supported(enum v4l2_memory io_method);
+
+
+#define RUN(_next) dev->run->_next
+
+
+device_s *device_init(void) {
+	device_runtime_s *run;
+	A_CALLOC(run, 1);
+	run->fd = -1;
+
+	device_s *dev;
+	A_CALLOC(dev, 1);
+	dev->path = "/dev/video0";
+	dev->width = 640;
+	dev->height = 480;
+	dev->format = V4L2_PIX_FMT_YUYV;
+	dev->jpeg_quality = 80;
+	dev->standard = V4L2_STD_UNKNOWN;
+	dev->io_method = V4L2_MEMORY_MMAP;
+	dev->n_bufs = get_cores_available() + 1;
+	dev->min_frame_size = 128;
+	dev->timeout = 1;
+	dev->run = run;
+	return dev;
+}
+
+void device_destroy(device_s *dev) {
+	free(dev->run);
+	free(dev);
+}
+
+int device_parse_format(const char *str) {
+	for (unsigned index = 0; index < ARRAY_LEN(_FORMATS); ++index) {
+		if (!strcasecmp(str, _FORMATS[index].name)) {
+			return _FORMATS[index].format;
+		}
+	}
+	return FORMAT_UNKNOWN;
+}
+
+v4l2_std_id device_parse_standard(const char *str) {
+	for (unsigned index = 1; index < ARRAY_LEN(_STANDARDS); ++index) {
+		if (!strcasecmp(str, _STANDARDS[index].name)) {
+			return _STANDARDS[index].standard;
+		}
+	}
+	return STANDARD_UNKNOWN;
+}
+
+int device_parse_io_method(const char *str) {
+	for (unsigned index = 0; index < ARRAY_LEN(_IO_METHODS); ++index) {
+		if (!strcasecmp(str, _IO_METHODS[index].name)) {
+			return _IO_METHODS[index].io_method;
+		}
+	}
+	return IO_METHOD_UNKNOWN;
+}
+
+int device_open(device_s *dev) {
+	if ((RUN(fd) = open(dev->path, O_RDWR|O_NONBLOCK)) < 0) {
+		LOG_PERROR("Can't open device");
+		goto error;
+	}
+	LOG_INFO("Device fd=%d opened", RUN(fd));
+
+	if (_device_open_check_cap(dev) < 0) {
+		goto error;
+	}
+	if (_device_open_dv_timings(dev) < 0) {
+		goto error;
+	}
+	if (_device_open_format(dev, true) < 0) {
+		goto error;
+	}
+	_device_open_hw_fps(dev);
+	_device_open_jpeg_quality(dev);
+	if (_device_open_io_method(dev) < 0) {
+		goto error;
+	}
+	if (_device_open_queue_buffers(dev) < 0) {
+		goto error;
+	}
+	_device_apply_controls(dev);
+
+	LOG_DEBUG("Device fd=%d initialized", RUN(fd));
+	return 0;
+
+	error:
+		device_close(dev);
+		return -1;
+}
+
+void device_close(device_s *dev) {
+	RUN(persistent_timeout_reported) = false;
+
+	if (RUN(hw_bufs)) {
+		LOG_DEBUG("Releasing device buffers ...");
+		for (unsigned index = 0; index < RUN(n_bufs); ++index) {
+#			define HW(_next) RUN(hw_bufs)[index]._next
+
+			if (HW(dma_fd) >= 0) {
+				close(HW(dma_fd));
+				HW(dma_fd) = -1;
+			}
+
+			if (dev->io_method == V4L2_MEMORY_MMAP) {
+				if (HW(raw.allocated) > 0 && HW(raw.data) != MAP_FAILED) {
+					if (munmap(HW(raw.data), HW(raw.allocated)) < 0) {
+						LOG_PERROR("Can't unmap device buffer=%u", index);
+					}
+				}
+			} else { // V4L2_MEMORY_USERPTR
+				if (HW(raw.data)) {
+					free(HW(raw.data));
+				}
+			}
+
+#			undef HW
+		}
+		RUN(n_bufs) = 0;
+		free(RUN(hw_bufs));
+		RUN(hw_bufs) = NULL;
+	}
+
+	if (RUN(fd) >= 0) {
+		LOG_DEBUG("Closing device ...");
+		if (close(RUN(fd)) < 0) {
+			LOG_PERROR("Can't close device fd=%d", RUN(fd));
+		} else {
+			LOG_INFO("Device fd=%d closed", RUN(fd));
+		}
+		RUN(fd) = -1;
+	}
+}
+
+int device_export_to_dma(device_s *dev) {
+#	define DMA_FD		RUN(hw_bufs[index].dma_fd)
+
+	for (unsigned index = 0; index < RUN(n_bufs); ++index) {
+		struct v4l2_exportbuffer exp = {0};
+		exp.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+		exp.index = index;
+
+		LOG_DEBUG("Exporting device buffer=%u to DMA ...", index);
+		if (xioctl(RUN(fd), VIDIOC_EXPBUF, &exp) < 0) {
+			LOG_PERROR("Can't export device buffer=%u to DMA", index);
+			goto error;
+		}
+		DMA_FD = exp.fd;
+	}
+
+	return 0;
+
+	error:
+		for (unsigned index = 0; index < RUN(n_bufs); ++index) {
+			if (DMA_FD >= 0) {
+				close(DMA_FD);
+				DMA_FD = -1;
+			}
+		}
+		return -1;
+
+#	undef DMA_FD
+}
+
+int device_switch_capturing(device_s *dev, bool enable) {
+	if (enable != RUN(capturing)) {
+		enum v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+		LOG_DEBUG("%s device capturing ...", (enable ? "Starting" : "Stopping"));
+		if (xioctl(RUN(fd), (enable ? VIDIOC_STREAMON : VIDIOC_STREAMOFF), &type) < 0) {
+			LOG_PERROR("Can't %s capturing", (enable ? "start" : "stop"));
+			if (enable) {
+				return -1;
+			}
+		}
+
+		RUN(capturing) = enable;
+		LOG_INFO("Capturing %s", (enable ? "started" : "stopped"));
+	}
+	return 0;
+}
+
+int device_select(device_s *dev, bool *has_read, bool *has_write, bool *has_error) {
+	int retval;
+
+#	define INIT_FD_SET(_set) \
+		fd_set _set; FD_ZERO(&_set); FD_SET(RUN(fd), &_set);
+
+	INIT_FD_SET(read_fds);
+	INIT_FD_SET(write_fds);
+	INIT_FD_SET(error_fds);
+
+#	undef INIT_FD_SET
+
+	struct timeval timeout;
+	timeout.tv_sec = dev->timeout;
+	timeout.tv_usec = 0;
+
+	LOG_DEBUG("Calling select() on video device ...");
+
+	retval = select(RUN(fd) + 1, &read_fds, &write_fds, &error_fds, &timeout);
+	if (retval > 0) {
+		*has_read = FD_ISSET(RUN(fd), &read_fds);
+		*has_write = FD_ISSET(RUN(fd), &write_fds);
+		*has_error = FD_ISSET(RUN(fd), &error_fds);
+	} else {
+		*has_read = false;
+		*has_write = false;
+		*has_error = false;
+	}
+	LOG_DEBUG("Device select() --> %d", retval);
+
+	if (retval > 0) {
+		RUN(persistent_timeout_reported) = false;
+	} else if (retval == 0) {
+		if (dev->persistent) {
+			if (!RUN(persistent_timeout_reported)) {
+				LOG_ERROR("Persistent device timeout (unplugged)");
+				RUN(persistent_timeout_reported) = true;
+			}
+		} else {
+			// Если устройство не персистентное, то таймаут является ошибкой
+			retval = -1;
+		}
+	}
+	return retval;
+}
+
+int device_grab_buffer(device_s *dev, hw_buffer_s **hw) {
+	*hw = NULL;
+
+	struct v4l2_buffer buf = {0};
+	buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	buf.memory = dev->io_method;
+
+	LOG_DEBUG("Grabbing device buffer ...");
+	if (xioctl(RUN(fd), VIDIOC_DQBUF, &buf) < 0) {
+		LOG_PERROR("Can't grab device buffer");
+		return -1;
+	}
+
+	LOG_DEBUG("Grabbed new frame: buffer=%u, bytesused=%u", buf.index, buf.bytesused);
+
+	if (buf.index >= RUN(n_bufs)) {
+		LOG_ERROR("V4L2 error: grabbed invalid device buffer=%u, n_bufs=%u", buf.index, RUN(n_bufs));
+		return -1;
+	}
+
+	// Workaround for broken, corrupted frames:
+	// Under low light conditions corrupted frames may get captured.
+	// The good thing is such frames are quite small compared to the regular frames.
+	// For example a VGA (640x480) webcam frame is normally >= 8kByte large,
+	// corrupted frames are smaller.
+	if (buf.bytesused < dev->min_frame_size) {
+		LOG_DEBUG("Dropped too small frame, assuming it was broken: buffer=%u, bytesused=%u",
+			buf.index, buf.bytesused);
+		LOG_DEBUG("Releasing device buffer=%u (broken frame) ...", buf.index);
+		if (xioctl(RUN(fd), VIDIOC_QBUF, &buf) < 0) {
+			LOG_PERROR("Can't release device buffer=%u (broken frame)", buf.index);
+			return -1;
+		}
+		return -2;
+	}
+
+#	define HW(_next) RUN(hw_bufs)[buf.index]._next
+
+	if (HW(grabbed)) {
+		LOG_ERROR("V4L2 error: grabbed device buffer=%u is already used", buf.index);
+		return -1;
+	}
+	HW(grabbed) = true;
+
+	HW(raw.dma_fd) = HW(dma_fd);
+	HW(raw.used) = buf.bytesused;
+	HW(raw.width) = RUN(width);
+	HW(raw.height) = RUN(height);
+	HW(raw.format) = RUN(format);
+	HW(raw.stride) = RUN(stride);
+	HW(raw.online) = true;
+	memcpy(&HW(buf), &buf, sizeof(struct v4l2_buffer));
+	HW(raw.grab_ts) = get_now_monotonic();
+
+#	undef HW
+	*hw = &RUN(hw_bufs[buf.index]);
+	return buf.index;
+}
+
+int device_release_buffer(device_s *dev, hw_buffer_s *hw) {
+	const unsigned index = hw->buf.index;
+	LOG_DEBUG("Releasing device buffer=%u ...", index);
+
+	if (xioctl(RUN(fd), VIDIOC_QBUF, &hw->buf) < 0) {
+		LOG_PERROR("Can't release device buffer=%u", index);
+		return -1;
+	}
+	hw->grabbed = false;
+	return 0;
+}
+
+int device_consume_event(device_s *dev) {
+	struct v4l2_event event;
+
+	LOG_DEBUG("Consuming V4L2 event ...");
+	if (xioctl(RUN(fd), VIDIOC_DQEVENT, &event) == 0) {
+		switch (event.type) {
+			case V4L2_EVENT_SOURCE_CHANGE:
+				LOG_INFO("Got V4L2_EVENT_SOURCE_CHANGE: source changed");
+				return -1;
+			case V4L2_EVENT_EOS:
+				LOG_INFO("Got V4L2_EVENT_EOS: end of stream (ignored)");
+				return 0;
+		}
+	} else {
+		LOG_PERROR("Got some V4L2 device event, but where is it? ");
+	}
+	return 0;
+}
+
+static int _device_open_check_cap(device_s *dev) {
+	struct v4l2_capability cap = {0};
+
+	LOG_DEBUG("Querying device capabilities ...");
+	if (xioctl(RUN(fd), VIDIOC_QUERYCAP, &cap) < 0) {
+		LOG_PERROR("Can't query device capabilities");
+		return -1;
+	}
+
+	if (!(cap.capabilities & V4L2_CAP_VIDEO_CAPTURE)) {
+		LOG_ERROR("Video capture is not supported by device");
+		return -1;
+	}
+
+	if (!(cap.capabilities & V4L2_CAP_STREAMING)) {
+		LOG_ERROR("Device doesn't support streaming IO");
+		return -1;
+	}
+
+	int input = dev->input; // Needs a pointer to int for ioctl()
+	LOG_INFO("Using input channel: %d", input);
+	if (xioctl(RUN(fd), VIDIOC_S_INPUT, &input) < 0) {
+		LOG_ERROR("Can't set input channel");
+		return -1;
+	}
+
+	if (dev->standard != V4L2_STD_UNKNOWN) {
+		LOG_INFO("Using TV standard: %s", _standard_to_string(dev->standard));
+		if (xioctl(RUN(fd), VIDIOC_S_STD, &dev->standard) < 0) {
+			LOG_ERROR("Can't set video standard");
+			return -1;
+		}
+	} else {
+		LOG_DEBUG("Using TV standard: DEFAULT");
+	}
+	return 0;
+}
+
+static int _device_open_dv_timings(device_s *dev) {
+	_device_apply_resolution(dev, dev->width, dev->height);
+	if (dev->dv_timings) {
+		LOG_DEBUG("Using DV-timings");
+
+		if (_device_apply_dv_timings(dev) < 0) {
+			return -1;
+		}
+
+		struct v4l2_event_subscription sub = {0};
+		sub.type = V4L2_EVENT_SOURCE_CHANGE;
+
+		LOG_DEBUG("Subscribing to DV-timings events ...")
+		if (xioctl(RUN(fd), VIDIOC_SUBSCRIBE_EVENT, &sub) < 0) {
+			LOG_PERROR("Can't subscribe to DV-timings events");
+			return -1;
+		}
+	}
+	return 0;
+}
+
+static int _device_apply_dv_timings(device_s *dev) {
+	struct v4l2_dv_timings dv = {0};
+
+	LOG_DEBUG("Calling ioctl(VIDIOC_QUERY_DV_TIMINGS) ...");
+	if (xioctl(RUN(fd), VIDIOC_QUERY_DV_TIMINGS, &dv) == 0) {
+		if (dv.type == V4L2_DV_BT_656_1120) {
+			// See v4l2_print_dv_timings() in the kernel
+			unsigned htot = V4L2_DV_BT_FRAME_WIDTH(&dv.bt);
+			unsigned vtot = V4L2_DV_BT_FRAME_HEIGHT(&dv.bt);
+			if (dv.bt.interlaced) {
+				vtot /= 2;
+			}
+			unsigned fps = ((htot * vtot) > 0 ? ((100 * (uint64_t)dv.bt.pixelclock)) / (htot * vtot) : 0);
+			LOG_INFO("Got new DV-timings: %ux%u%s%u.%02u, pixclk=%llu, vsync=%u, hsync=%u",
+				dv.bt.width, dv.bt.height, (dv.bt.interlaced ? "i" : "p"), fps / 100, fps % 100,
+				(unsigned long long)dv.bt.pixelclock, dv.bt.vsync, dv.bt.hsync); // See #11 about %llu
+		} else {
+			LOG_INFO("Got new DV-timings: %ux%u, pixclk=%llu, vsync=%u, hsync=%u",
+				dv.bt.width, dv.bt.height,
+				(unsigned long long)dv.bt.pixelclock, dv.bt.vsync, dv.bt.hsync);
+		}
+
+		LOG_DEBUG("Calling ioctl(VIDIOC_S_DV_TIMINGS) ...");
+		if (xioctl(RUN(fd), VIDIOC_S_DV_TIMINGS, &dv) < 0) {
+			LOG_PERROR("Failed to set DV-timings");
+			return -1;
+		}
+
+		if (_device_apply_resolution(dev, dv.bt.width, dv.bt.height) < 0) {
+			return -1;
+		}
+
+	} else {
+		LOG_DEBUG("Calling ioctl(VIDIOC_QUERYSTD) ...");
+		if (xioctl(RUN(fd), VIDIOC_QUERYSTD, &dev->standard) == 0) {
+			LOG_INFO("Applying the new VIDIOC_S_STD: %s ...", _standard_to_string(dev->standard));
+			if (xioctl(RUN(fd), VIDIOC_S_STD, &dev->standard) < 0) {
+				LOG_PERROR("Can't set video standard");
+				return -1;
+			}
+		}
+	}
+	return 0;
+}
+
+static int _device_open_format(device_s *dev, bool first) {
+	const unsigned stride = align_size(RUN(width), 32) << 1;
+
+	struct v4l2_format fmt = {0};
+	fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	fmt.fmt.pix.width = RUN(width);
+	fmt.fmt.pix.height = RUN(height);
+	fmt.fmt.pix.pixelformat = dev->format;
+	fmt.fmt.pix.field = V4L2_FIELD_ANY;
+	fmt.fmt.pix.bytesperline = stride;
+
+	// Set format
+	LOG_DEBUG("Probing device format=%s, stride=%u, resolution=%ux%u ...",
+		_format_to_string_supported(dev->format), stride, RUN(width), RUN(height));
+	if (xioctl(RUN(fd), VIDIOC_S_FMT, &fmt) < 0) {
+		LOG_PERROR("Can't set device format");
+		return -1;
+	}
+
+	// Check resolution
+	bool retry = false;
+	if (fmt.fmt.pix.width != RUN(width) || fmt.fmt.pix.height != RUN(height)) {
+		LOG_ERROR("Requested resolution=%ux%u is unavailable", RUN(width), RUN(height));
+		retry = true;
+	}
+	if (_device_apply_resolution(dev, fmt.fmt.pix.width, fmt.fmt.pix.height) < 0) {
+		return -1;
+	}
+	if (first && retry) {
+		return _device_open_format(dev, false);
+	}
+	LOG_INFO("Using resolution: %ux%u", RUN(width), RUN(height));
+
+	// Check format
+	if (fmt.fmt.pix.pixelformat != dev->format) {
+		LOG_ERROR("Could not obtain the requested format=%s; driver gave us %s",
+			_format_to_string_supported(dev->format),
+			_format_to_string_supported(fmt.fmt.pix.pixelformat));
+
+		char *format_str;
+		if ((format_str = (char *)_format_to_string_nullable(fmt.fmt.pix.pixelformat)) != NULL) {
+			LOG_INFO("Falling back to format=%s", format_str);
+		} else {
+			char fourcc_str[8];
+			LOG_ERROR("Unsupported format=%s (fourcc)",
+				fourcc_to_string(fmt.fmt.pix.pixelformat, fourcc_str, 8));
+			return -1;
+		}
+	}
+
+	RUN(format) = fmt.fmt.pix.pixelformat;
+	LOG_INFO("Using format: %s", _format_to_string_supported(RUN(format)));
+
+	RUN(stride) = fmt.fmt.pix.bytesperline;
+	RUN(raw_size) = fmt.fmt.pix.sizeimage; // Only for userptr
+	return 0;
+}
+
+static void _device_open_hw_fps(device_s *dev) {
+	RUN(hw_fps) = 0;
+
+	struct v4l2_streamparm setfps = {0};
+	setfps.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+	LOG_DEBUG("Querying HW FPS ...");
+	if (xioctl(RUN(fd), VIDIOC_G_PARM, &setfps) < 0) {
+		if (errno == ENOTTY) { // Quiet message for TC358743
+			LOG_INFO("Querying HW FPS changing is not supported");
+		} else {
+			LOG_PERROR("Can't query HW FPS changing");
+		}
+		return;
+	}
+
+	if (!(setfps.parm.capture.capability & V4L2_CAP_TIMEPERFRAME)) {
+		LOG_INFO("Changing HW FPS is not supported");
+		return;
+	}
+
+#	define SETFPS_TPF(_next) setfps.parm.capture.timeperframe._next
+
+	MEMSET_ZERO(setfps);
+	setfps.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	SETFPS_TPF(numerator) = 1;
+	SETFPS_TPF(denominator) = (dev->desired_fps == 0 ? 255 : dev->desired_fps);
+
+	if (xioctl(RUN(fd), VIDIOC_S_PARM, &setfps) < 0) {
+		LOG_PERROR("Can't set HW FPS");
+		return;
+	}
+
+	if (SETFPS_TPF(numerator) != 1) {
+		LOG_ERROR("Invalid HW FPS numerator: %u != 1", SETFPS_TPF(numerator));
+		return;
+	}
+
+	if (SETFPS_TPF(denominator) == 0) { // Не знаю, бывает ли так, но пускай на всякий случай
+		LOG_ERROR("Invalid HW FPS denominator: 0");
+		return;
+	}
+
+	RUN(hw_fps) = SETFPS_TPF(denominator);
+	if (dev->desired_fps != RUN(hw_fps)) {
+		LOG_INFO("Using HW FPS: %u -> %u (coerced)", dev->desired_fps, RUN(hw_fps));
+	} else {
+		LOG_INFO("Using HW FPS: %u", RUN(hw_fps));
+	}
+
+#	undef SETFPS_TPF
+}
+
+static void _device_open_jpeg_quality(device_s *dev) {
+	unsigned quality = 0;
+
+	if (is_jpeg(RUN(format))) {
+		struct v4l2_jpegcompression comp = {0};
+
+		if (xioctl(RUN(fd), VIDIOC_G_JPEGCOMP, &comp) < 0) {
+			LOG_ERROR("Device doesn't support setting of HW encoding quality parameters");
+		} else {
+			comp.quality = dev->jpeg_quality;
+			if (xioctl(RUN(fd), VIDIOC_S_JPEGCOMP, &comp) < 0) {
+				LOG_ERROR("Can't change MJPEG quality for JPEG source with HW pass-through encoder");
+			} else {
+				quality = dev->jpeg_quality;
+			}
+		}
+	}
+
+	RUN(jpeg_quality) = quality;
+}
+
+static int _device_open_io_method(device_s *dev) {
+	LOG_INFO("Using IO method: %s", _io_method_to_string_supported(dev->io_method));
+	switch (dev->io_method) {
+		case V4L2_MEMORY_MMAP: return _device_open_io_method_mmap(dev);
+		case V4L2_MEMORY_USERPTR: return _device_open_io_method_userptr(dev);
+		default: assert(0 && "Unsupported IO method");
+	}
+	return -1;
+}
+
+static int _device_open_io_method_mmap(device_s *dev) {
+	struct v4l2_requestbuffers req = {0};
+	req.count = dev->n_bufs;
+	req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	req.memory = V4L2_MEMORY_MMAP;
+
+	LOG_DEBUG("Requesting %u device buffers for MMAP ...", req.count);
+	if (xioctl(RUN(fd), VIDIOC_REQBUFS, &req) < 0) {
+		LOG_PERROR("Device '%s' doesn't support MMAP method", dev->path);
+		return -1;
+	}
+
+	if (req.count < 1) {
+		LOG_ERROR("Insufficient buffer memory: %u", req.count);
+		return -1;
+	} else {
+		LOG_INFO("Requested %u device buffers, got %u", dev->n_bufs, req.count);
+	}
+
+	LOG_DEBUG("Allocating device buffers ...");
+
+	A_CALLOC(RUN(hw_bufs), req.count);
+	for (RUN(n_bufs) = 0; RUN(n_bufs) < req.count; ++RUN(n_bufs)) {
+		struct v4l2_buffer buf = {0};
+		buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+		buf.memory = V4L2_MEMORY_MMAP;
+		buf.index = RUN(n_bufs);
+
+		LOG_DEBUG("Calling ioctl(VIDIOC_QUERYBUF) for device buffer=%u ...", RUN(n_bufs));
+		if (xioctl(RUN(fd), VIDIOC_QUERYBUF, &buf) < 0) {
+			LOG_PERROR("Can't VIDIOC_QUERYBUF");
+			return -1;
+		}
+
+#		define HW(_next) RUN(hw_bufs)[RUN(n_bufs)]._next
+
+		HW(dma_fd) = -1;
+
+		LOG_DEBUG("Mapping device buffer=%u ...", RUN(n_bufs));
+		if ((HW(raw.data) = mmap(
+			NULL,
+			buf.length,
+			PROT_READ | PROT_WRITE,
+			MAP_SHARED,
+			RUN(fd),
+			buf.m.offset
+		)) == MAP_FAILED) {
+			LOG_PERROR("Can't map device buffer=%u", RUN(n_bufs));
+			return -1;
+		}
+		HW(raw.allocated) = buf.length;
+
+#		undef HW
+	}
+	return 0;
+}
+
+static int _device_open_io_method_userptr(device_s *dev) {
+	struct v4l2_requestbuffers req = {0};
+	req.count = dev->n_bufs;
+	req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	req.memory = V4L2_MEMORY_USERPTR;
+
+	LOG_DEBUG("Requesting %u device buffers for USERPTR ...", req.count);
+	if (xioctl(RUN(fd), VIDIOC_REQBUFS, &req) < 0) {
+		LOG_PERROR("Device '%s' doesn't support USERPTR method", dev->path);
+		return -1;
+	}
+
+	if (req.count < 1) {
+		LOG_ERROR("Insufficient buffer memory: %u", req.count);
+		return -1;
+	} else {
+		LOG_INFO("Requested %u device buffers, got %u", dev->n_bufs, req.count);
+	}
+
+	LOG_DEBUG("Allocating device buffers ...");
+
+	A_CALLOC(RUN(hw_bufs), req.count);
+
+	const unsigned page_size = getpagesize();
+	const unsigned buf_size = align_size(RUN(raw_size), page_size);
+
+	for (RUN(n_bufs) = 0; RUN(n_bufs) < req.count; ++RUN(n_bufs)) {
+#       define HW(_next) RUN(hw_bufs)[RUN(n_bufs)]._next
+		assert(HW(raw.data) = aligned_alloc(page_size, buf_size));
+		memset(HW(raw.data), 0, buf_size);
+		HW(raw.allocated) = buf_size;
+#		undef HW
+	}
+	return 0;
+}
+
+static int _device_open_queue_buffers(device_s *dev) {
+	for (unsigned index = 0; index < RUN(n_bufs); ++index) {
+		struct v4l2_buffer buf = {0};
+		buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+		buf.memory = dev->io_method;
+		buf.index = index;
+		if (dev->io_method == V4L2_MEMORY_USERPTR) {
+			buf.m.userptr = (unsigned long)RUN(hw_bufs)[index].raw.data;
+			buf.length = RUN(hw_bufs)[index].raw.allocated;
+		}
+
+		LOG_DEBUG("Calling ioctl(VIDIOC_QBUF) for buffer=%u ...", index);
+		if (xioctl(RUN(fd), VIDIOC_QBUF, &buf) < 0) {
+			LOG_PERROR("Can't VIDIOC_QBUF");
+			return -1;
+		}
+	}
+	return 0;
+}
+
+static int _device_apply_resolution(device_s *dev, unsigned width, unsigned height) {
+	// Тут VIDEO_MIN_* не используются из-за странностей минимального разрешения при отсутствии сигнала
+	// у некоторых устройств, например TC358743
+	if (
+		width == 0 || width > VIDEO_MAX_WIDTH
+		|| height == 0 || height > VIDEO_MAX_HEIGHT
+	) {
+		LOG_ERROR("Requested forbidden resolution=%ux%u: min=1x1, max=%ux%u",
+			width, height, VIDEO_MAX_WIDTH, VIDEO_MAX_HEIGHT);
+		return -1;
+	}
+	RUN(width) = width;
+	RUN(height) = height;
+	return 0;
+}
+
+static void _device_apply_controls(device_s *dev) {
+#	define SET_CID_VALUE(_cid, _field, _value, _quiet) { \
+			struct v4l2_queryctrl query; \
+			if (_device_query_control(dev, &query, #_field, _cid, _quiet) == 0) { \
+				_device_set_control(dev, &query, #_field, _cid, _value, _quiet); \
+			} \
+		}
+
+#	define SET_CID_DEFAULT(_cid, _field, _quiet) { \
+			struct v4l2_queryctrl query; \
+			if (_device_query_control(dev, &query, #_field, _cid, _quiet) == 0) { \
+				_device_set_control(dev, &query, #_field, _cid, query.default_value, _quiet); \
+			} \
+		}
+
+#	define CONTROL_MANUAL_CID(_cid, _field) { \
+			if (dev->ctl._field.mode == CTL_MODE_VALUE) { \
+				SET_CID_VALUE(_cid, _field, dev->ctl._field.value, false); \
+			} else if (dev->ctl._field.mode == CTL_MODE_DEFAULT) { \
+				SET_CID_DEFAULT(_cid, _field, false); \
+			} \
+		}
+
+#	define CONTROL_AUTO_CID(_cid_auto, _cid_manual, _field) { \
+			if (dev->ctl._field.mode == CTL_MODE_VALUE) { \
+				SET_CID_VALUE(_cid_auto, _field##_auto, 0, true); \
+				SET_CID_VALUE(_cid_manual, _field, dev->ctl._field.value, false); \
+			} else if (dev->ctl._field.mode == CTL_MODE_AUTO) { \
+				SET_CID_VALUE(_cid_auto, _field##_auto, 1, false); \
+			} else if (dev->ctl._field.mode == CTL_MODE_DEFAULT) { \
+				SET_CID_VALUE(_cid_auto, _field##_auto, 0, true); /* Reset inactive flag */ \
+				SET_CID_DEFAULT(_cid_manual, _field, false); \
+				SET_CID_DEFAULT(_cid_auto, _field##_auto, false); \
+			} \
+		}
+
+	CONTROL_AUTO_CID	(V4L2_CID_AUTOBRIGHTNESS,		V4L2_CID_BRIGHTNESS,				brightness);
+	CONTROL_MANUAL_CID	(								V4L2_CID_CONTRAST,					contrast);
+	CONTROL_MANUAL_CID	(								V4L2_CID_SATURATION,				saturation);
+	CONTROL_AUTO_CID	(V4L2_CID_HUE_AUTO,				V4L2_CID_HUE,						hue);
+	CONTROL_MANUAL_CID	(								V4L2_CID_GAMMA,						gamma);
+	CONTROL_MANUAL_CID	(								V4L2_CID_SHARPNESS,					sharpness);
+	CONTROL_MANUAL_CID	(								V4L2_CID_BACKLIGHT_COMPENSATION,	backlight_compensation);
+	CONTROL_AUTO_CID	(V4L2_CID_AUTO_WHITE_BALANCE,	V4L2_CID_WHITE_BALANCE_TEMPERATURE,	white_balance);
+	CONTROL_AUTO_CID	(V4L2_CID_AUTOGAIN,				V4L2_CID_GAIN,						gain);
+	CONTROL_MANUAL_CID	(								V4L2_CID_COLORFX,					color_effect);
+	CONTROL_MANUAL_CID	(								V4L2_CID_ROTATE,	   				rotate);
+	CONTROL_MANUAL_CID	(								V4L2_CID_VFLIP,						flip_vertical);
+	CONTROL_MANUAL_CID	(								V4L2_CID_HFLIP,						flip_horizontal);
+
+#	undef CONTROL_AUTO_CID
+#	undef CONTROL_MANUAL_CID
+#	undef SET_CID_DEFAULT
+#	undef SET_CID_VALUE
+}
+
+static int _device_query_control(
+	device_s *dev, struct v4l2_queryctrl *query,
+	const char *name, unsigned cid, bool quiet) {
+
+	// cppcheck-suppress redundantPointerOp
+	MEMSET_ZERO(*query);
+	query->id = cid;
+
+	if (xioctl(RUN(fd), VIDIOC_QUERYCTRL, query) < 0 || query->flags & V4L2_CTRL_FLAG_DISABLED) {
+		if (!quiet) {
+			LOG_ERROR("Changing control %s is unsupported", name);
+		}
+		return -1;
+	}
+	return 0;
+}
+
+static void _device_set_control(
+	device_s *dev, struct v4l2_queryctrl *query,
+	const char *name, unsigned cid, int value, bool quiet) {
+
+	if (value < query->minimum || value > query->maximum || value % query->step != 0) {
+		if (!quiet) {
+			LOG_ERROR("Invalid value %d of control %s: min=%d, max=%d, default=%d, step=%u",
+				value, name, query->minimum, query->maximum, query->default_value, query->step);
+		}
+		return;
+	}
+
+	struct v4l2_control ctl = {0};
+	ctl.id = cid;
+	ctl.value = value;
+
+	if (xioctl(RUN(fd), VIDIOC_S_CTRL, &ctl) < 0) {
+		if (!quiet) {
+			LOG_PERROR("Can't set control %s", name);
+		}
+	} else if (!quiet) {
+		LOG_INFO("Applying control %s: %d", name, ctl.value);
+	}
+}
+
+static const char *_format_to_string_nullable(unsigned format) {
+	for (unsigned index = 0; index < ARRAY_LEN(_FORMATS); ++index) {
+		if (format == _FORMATS[index].format) {
+			return _FORMATS[index].name;
+		}
+	}
+	return NULL;
+}
+
+static const char *_format_to_string_supported(unsigned format) {
+	const char *format_str = _format_to_string_nullable(format);
+	return (format_str == NULL ? "unsupported" : format_str);
+}
+
+static const char *_standard_to_string(v4l2_std_id standard) {
+	for (unsigned index = 0; index < ARRAY_LEN(_STANDARDS); ++index) {
+		if (standard == _STANDARDS[index].standard) {
+			return _STANDARDS[index].name;
+		}
+	}
+	return _STANDARDS[0].name;
+}
+
+static const char *_io_method_to_string_supported(enum v4l2_memory io_method) {
+	for (unsigned index = 0; index < ARRAY_LEN(_IO_METHODS); ++index) {
+		if (io_method == _IO_METHODS[index].io_method) {
+			return _IO_METHODS[index].name;
+		}
+	}
+	return "unsupported";
+}
+
+#	undef RUN

src/ustreamer/device.h

@@ -0,0 +1,157 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#pragma once
+
+#include <stdlib.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <string.h>
+#include <strings.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <assert.h>
+
+#include <sys/select.h>
+#include <sys/mman.h>
+#include <sys/time.h>
+
+#include <pthread.h>
+#include <linux/videodev2.h>
+#include <linux/v4l2-controls.h>
+
+#include "../libs/tools.h"
+#include "../libs/logging.h"
+#include "../libs/threading.h"
+#include "../libs/frame.h"
+
+#include "xioctl.h"
+
+
+#define VIDEO_MIN_WIDTH		((unsigned)160)
+#define VIDEO_MAX_WIDTH		((unsigned)10240)
+
+#define VIDEO_MIN_HEIGHT	((unsigned)120)
+#define VIDEO_MAX_HEIGHT	((unsigned)4320)
+
+#define VIDEO_MAX_FPS		((unsigned)120)
+
+#define STANDARD_UNKNOWN	V4L2_STD_UNKNOWN
+#define STANDARDS_STR		"PAL, NTSC, SECAM"
+
+#define FORMAT_UNKNOWN	-1
+#define FORMATS_STR		"YUYV, UYVY, RGB565, RGB24, MJPEG, JPEG"
+
+#define IO_METHOD_UNKNOWN	-1
+#define IO_METHODS_STR		"MMAP, USERPTR"
+
+
+typedef struct {
+	frame_s				raw;
+	struct v4l2_buffer	buf;
+	int					dma_fd;
+	bool				grabbed;
+} hw_buffer_s;
+
+typedef struct {
+	int			fd;
+	unsigned	width;
+	unsigned	height;
+	unsigned	format;
+	unsigned	stride;
+	unsigned	hw_fps;
+	unsigned	jpeg_quality;
+	size_t		raw_size;
+	unsigned	n_bufs;
+	hw_buffer_s	*hw_bufs;
+	bool		capturing;
+	bool		persistent_timeout_reported;
+} device_runtime_s;
+
+typedef enum {
+	CTL_MODE_NONE = 0,
+	CTL_MODE_VALUE,
+	CTL_MODE_AUTO,
+	CTL_MODE_DEFAULT,
+} control_mode_e;
+
+typedef struct {
+	control_mode_e	mode;
+	int				value;
+} control_s;
+
+typedef struct {
+	control_s brightness;
+	control_s contrast;
+	control_s saturation;
+	control_s hue;
+	control_s gamma;
+	control_s sharpness;
+	control_s backlight_compensation;
+	control_s white_balance;
+	control_s gain;
+	control_s color_effect;
+	control_s rotate;
+	control_s flip_vertical;
+	control_s flip_horizontal;
+} controls_s;
+
+typedef struct {
+	char				*path;
+	unsigned			input;
+	unsigned			width;
+	unsigned			height;
+	unsigned			format;
+	unsigned			jpeg_quality;
+	v4l2_std_id			standard;
+	enum v4l2_memory	io_method;
+	bool				dv_timings;
+	unsigned			n_bufs;
+	unsigned			desired_fps;
+	size_t				min_frame_size;
+	bool				persistent;
+	unsigned			timeout;
+
+	controls_s ctl;
+
+	device_runtime_s *run;
+} device_s;
+
+
+device_s *device_init(void);
+void device_destroy(device_s *dev);
+
+int device_parse_format(const char *str);
+v4l2_std_id device_parse_standard(const char *str);
+int device_parse_io_method(const char *str);
+
+int device_open(device_s *dev);
+void device_close(device_s *dev);
+
+int device_export_to_dma(device_s *dev);
+int device_switch_capturing(device_s *dev, bool enable);
+int device_select(device_s *dev, bool *has_read, bool *has_write, bool *has_error);
+int device_grab_buffer(device_s *dev, hw_buffer_s **hw);
+int device_release_buffer(device_s *dev, hw_buffer_s *hw);
+int device_consume_event(device_s *dev);

src/ustreamer/encoder.c

@@ -0,0 +1,248 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#include "encoder.h"
+
+
+static const struct {
+	const char *name;
+	const encoder_type_e type;
+} _ENCODER_TYPES[] = {
+	{"CPU",			ENCODER_TYPE_CPU},
+	{"HW",			ENCODER_TYPE_HW},
+	{"M2M-VIDEO",	ENCODER_TYPE_M2M_VIDEO},
+	{"M2M-IMAGE",	ENCODER_TYPE_M2M_IMAGE},
+	{"M2M-MJPEG",	ENCODER_TYPE_M2M_VIDEO},
+	{"M2M-JPEG",	ENCODER_TYPE_M2M_IMAGE},
+	{"OMX",			ENCODER_TYPE_M2M_IMAGE},
+	{"NOOP",		ENCODER_TYPE_NOOP},
+};
+
+
+static void *_worker_job_init(void *v_enc);
+static void _worker_job_destroy(void *v_job);
+static bool _worker_run_job(worker_s *wr);
+
+
+#define ER(_next)	enc->run->_next
+
+
+encoder_s *encoder_init(void) {
+	encoder_runtime_s *run;
+	A_CALLOC(run, 1);
+	run->type = ENCODER_TYPE_CPU;
+	run->quality = 80;
+	A_MUTEX_INIT(&run->mutex);
+
+	encoder_s *enc;
+	A_CALLOC(enc, 1);
+	enc->type = run->type;
+	enc->n_workers = get_cores_available();
+	enc->run = run;
+	return enc;
+}
+
+void encoder_destroy(encoder_s *enc) {
+	if (ER(m2ms)) {
+		for (unsigned index = 0; index < ER(n_m2ms); ++index) {
+			if (ER(m2ms[index])) {
+				m2m_encoder_destroy(ER(m2ms[index]));
+			}
+		}
+		free(ER(m2ms));
+	}
+	A_MUTEX_DESTROY(&ER(mutex));
+	free(enc->run);
+	free(enc);
+}
+
+encoder_type_e encoder_parse_type(const char *str) {
+	for (unsigned index = 0; index < ARRAY_LEN(_ENCODER_TYPES); ++index) {
+		if (!strcasecmp(str, _ENCODER_TYPES[index].name)) {
+			return _ENCODER_TYPES[index].type;
+		}
+	}
+	return ENCODER_TYPE_UNKNOWN;
+}
+
+const char *encoder_type_to_string(encoder_type_e type) {
+	for (unsigned index = 0; index < ARRAY_LEN(_ENCODER_TYPES); ++index) {
+		if (_ENCODER_TYPES[index].type == type) {
+			return _ENCODER_TYPES[index].name;
+		}
+	}
+	return _ENCODER_TYPES[0].name;
+}
+
+workers_pool_s *encoder_workers_pool_init(encoder_s *enc, device_s *dev) {
+#	define DR(_next) dev->run->_next
+
+	encoder_type_e type = (ER(cpu_forced) ? ENCODER_TYPE_CPU : enc->type);
+	unsigned quality = dev->jpeg_quality;
+	unsigned n_workers = min_u(enc->n_workers, DR(n_bufs));
+	bool cpu_forced = false;
+
+	if (is_jpeg(DR(format)) && type != ENCODER_TYPE_HW) {
+		LOG_INFO("Switching to HW encoder: the input is (M)JPEG ...");
+		type = ENCODER_TYPE_HW;
+	}
+
+	if (type == ENCODER_TYPE_HW) {
+		if (!is_jpeg(DR(format))) {
+			LOG_INFO("Switching to CPU encoder: the input format is not (M)JPEG ...");
+			goto use_cpu;
+		}
+		quality = DR(jpeg_quality);
+		n_workers = 1;
+
+	} else if (type == ENCODER_TYPE_M2M_VIDEO || type == ENCODER_TYPE_M2M_IMAGE) {
+		LOG_DEBUG("Preparing M2M-%s encoder ...", (type == ENCODER_TYPE_M2M_VIDEO ? "VIDEO" : "IMAGE"));
+		if (ER(m2ms) == NULL) {
+			A_CALLOC(ER(m2ms), n_workers);
+		}
+		for (; ER(n_m2ms) < n_workers; ++ER(n_m2ms)) {
+			// Начинаем с нуля и доинициализируем на следующих заходах при необходимости
+			char name[32];
+			snprintf(name, 32, "JPEG-%u", ER(n_m2ms));
+			if (type == ENCODER_TYPE_M2M_VIDEO) {
+				ER(m2ms[ER(n_m2ms)]) = m2m_mjpeg_encoder_init(name, enc->m2m_path, quality);
+			} else {
+				ER(m2ms[ER(n_m2ms)]) = m2m_jpeg_encoder_init(name, enc->m2m_path, quality);
+			}
+		}
+
+	} else if (type == ENCODER_TYPE_NOOP) {
+		n_workers = 1;
+		quality = 0;
+	}
+
+	goto ok;
+
+	use_cpu:
+		type = ENCODER_TYPE_CPU;
+		quality = dev->jpeg_quality;
+
+	ok:
+		if (type == ENCODER_TYPE_NOOP) {
+			LOG_INFO("Using JPEG NOOP encoder");
+		} else if (quality == 0) {
+			LOG_INFO("Using JPEG quality: encoder default");
+		} else {
+			LOG_INFO("Using JPEG quality: %u%%", quality);
+		}
+
+		A_MUTEX_LOCK(&ER(mutex));
+		ER(type) = type;
+		ER(quality) = quality;
+		if (cpu_forced) {
+			ER(cpu_forced) = true;
+		}
+		A_MUTEX_UNLOCK(&ER(mutex));
+
+		long double desired_interval = 0;
+		if (dev->desired_fps > 0 && (dev->desired_fps < dev->run->hw_fps || dev->run->hw_fps == 0)) {
+			desired_interval = (long double)1 / dev->desired_fps;
+		}
+
+		return workers_pool_init(
+			"JPEG", "jw", n_workers, desired_interval,
+			_worker_job_init, (void *)enc,
+			_worker_job_destroy,
+			_worker_run_job);
+
+#	undef DR
+}
+
+void encoder_get_runtime_params(encoder_s *enc, encoder_type_e *type, unsigned *quality) {
+	A_MUTEX_LOCK(&ER(mutex));
+	*type = ER(type);
+	*quality = ER(quality);
+	A_MUTEX_UNLOCK(&ER(mutex));
+}
+
+static void *_worker_job_init(void *v_enc) {
+	encoder_job_s *job;
+	A_CALLOC(job, 1);
+	job->enc = (encoder_s *)v_enc;
+	job->dest = frame_init();
+	return (void *)job;
+}
+
+static void _worker_job_destroy(void *v_job) {
+	encoder_job_s *job = (encoder_job_s *)v_job;
+	frame_destroy(job->dest);
+	free(job);
+}
+
+#undef ER
+
+static bool _worker_run_job(worker_s *wr) {
+	encoder_job_s *job = (encoder_job_s *)wr->job;
+	frame_s *src = &job->hw->raw;
+	frame_s *dest = job->dest;
+
+#	define ER(_next) job->enc->run->_next
+
+	assert(ER(type) != ENCODER_TYPE_UNKNOWN);
+
+	if (ER(type) == ENCODER_TYPE_CPU) {
+		LOG_VERBOSE("Compressing JPEG using CPU: worker=%s, buffer=%u",
+			wr->name, job->hw->buf.index);
+		cpu_encoder_compress(src, dest, ER(quality));
+
+	} else if (ER(type) == ENCODER_TYPE_HW) {
+		LOG_VERBOSE("Compressing JPEG using HW (just copying): worker=%s, buffer=%u",
+			wr->name, job->hw->buf.index);
+		hw_encoder_compress(src, dest);
+
+	} else if (ER(type) == ENCODER_TYPE_M2M_VIDEO || ER(type) == ENCODER_TYPE_M2M_IMAGE) {
+		LOG_VERBOSE("Compressing JPEG using M2M-%s: worker=%s, buffer=%u",
+			(ER(type) == ENCODER_TYPE_M2M_VIDEO ? "VIDEO" : "IMAGE"), wr->name, job->hw->buf.index);
+		if (m2m_encoder_compress(ER(m2ms[wr->number]), src, dest, false) < 0) {
+			goto error;
+		}
+
+	} else if (ER(type) == ENCODER_TYPE_NOOP) {
+		LOG_VERBOSE("Compressing JPEG using NOOP (do nothing): worker=%s, buffer=%u",
+			wr->name, job->hw->buf.index);
+		usleep(5000); // Просто чтобы работала логика desired_fps
+		dest->encode_end_ts = get_now_monotonic();
+	}
+
+	LOG_VERBOSE("Compressed new JPEG: size=%zu, time=%0.3Lf, worker=%s, buffer=%u",
+		job->dest->used,
+		job->dest->encode_end_ts - job->dest->encode_begin_ts,
+		wr->name,
+		job->hw->buf.index);
+
+	return true;
+
+	error:
+		LOG_ERROR("Compression failed: worker=%s, buffer=%u", wr->name, job->hw->buf.index);
+		LOG_ERROR("Error while compressing buffer, falling back to CPU");
+		A_MUTEX_LOCK(&ER(mutex));
+		ER(cpu_forced) = true;
+		A_MUTEX_UNLOCK(&ER(mutex));
+		return false;
+
+#	undef ER
+}

src/ustreamer/encoder.h

@@ -0,0 +1,91 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#pragma once
+
+#include <stdlib.h>
+#include <stdbool.h>
+#include <strings.h>
+#include <assert.h>
+
+#include <pthread.h>
+#include <linux/videodev2.h>
+
+#include "../libs/tools.h"
+#include "../libs/threading.h"
+#include "../libs/logging.h"
+#include "../libs/frame.h"
+
+#include "device.h"
+#include "workers.h"
+#include "m2m.h"
+
+#include "encoders/cpu/encoder.h"
+#include "encoders/hw/encoder.h"
+
+
+#define ENCODER_TYPES_STR "CPU, HW, M2M-VIDEO, M2M-IMAGE, NOOP"
+
+typedef enum {
+	ENCODER_TYPE_UNKNOWN, // Only for encoder_parse_type() and main()
+	ENCODER_TYPE_CPU,
+	ENCODER_TYPE_HW,
+	ENCODER_TYPE_M2M_VIDEO,
+	ENCODER_TYPE_M2M_IMAGE,
+	ENCODER_TYPE_NOOP,
+} encoder_type_e;
+
+typedef struct {
+	encoder_type_e	type;
+	unsigned		quality;
+	bool			cpu_forced;
+	pthread_mutex_t	mutex;
+
+	unsigned		n_m2ms;
+	m2m_encoder_s	**m2ms;
+} encoder_runtime_s;
+
+typedef struct {
+	encoder_type_e	type;
+	unsigned		n_workers;
+	char			*m2m_path;
+
+	encoder_runtime_s *run;
+} encoder_s;
+
+typedef struct {
+	encoder_s	*enc;
+	hw_buffer_s	*hw;
+	frame_s		*dest;
+} encoder_job_s;
+
+
+encoder_s *encoder_init(void);
+void encoder_destroy(encoder_s *enc);
+
+encoder_type_e encoder_parse_type(const char *str);
+const char *encoder_type_to_string(encoder_type_e type);
+
+workers_pool_s *encoder_workers_pool_init(encoder_s *enc, device_s *dev);
+void encoder_get_runtime_params(encoder_s *enc, encoder_type_e *type, unsigned *quality);
+
+int encoder_compress(encoder_s *enc, unsigned worker_number, frame_s *src, frame_s *dest);

src/ustreamer/encoders/cpu/encoder.c

@@ -0,0 +1,273 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    This source file based on code of MJPG-Streamer.                        #
+#                                                                            #
+#    Copyright (C) 2005-2006  Laurent Pinchart & Michel Xhaard               #
+#    Copyright (C) 2006  Gabriel A. Devenyi                                  #
+#    Copyright (C) 2007  Tom Stöveken                                        #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#include "encoder.h"
+
+
+typedef struct {
+	struct	jpeg_destination_mgr mgr; // Default manager
+	JOCTET	*buf; // Start of buffer
+	frame_s	*frame;
+} _jpeg_dest_manager_s;
+
+
+static void _jpeg_set_dest_frame(j_compress_ptr jpeg, frame_s *frame);
+
+static void _jpeg_write_scanlines_yuyv(struct jpeg_compress_struct *jpeg, const frame_s *frame);
+static void _jpeg_write_scanlines_uyvy(struct jpeg_compress_struct *jpeg, const frame_s *frame);
+static void _jpeg_write_scanlines_rgb565(struct jpeg_compress_struct *jpeg, const frame_s *frame);
+static void _jpeg_write_scanlines_rgb24(struct jpeg_compress_struct *jpeg, const frame_s *frame);
+
+static void _jpeg_init_destination(j_compress_ptr jpeg);
+static boolean _jpeg_empty_output_buffer(j_compress_ptr jpeg);
+static void _jpeg_term_destination(j_compress_ptr jpeg);
+
+
+void cpu_encoder_compress(const frame_s *src, frame_s *dest, unsigned quality) {
+	// This function based on compress_image_to_jpeg() from mjpg-streamer
+
+	frame_encoding_begin(src, dest, V4L2_PIX_FMT_JPEG);
+
+	struct jpeg_compress_struct jpeg;
+	struct jpeg_error_mgr jpeg_error;
+
+	jpeg.err = jpeg_std_error(&jpeg_error);
+	jpeg_create_compress(&jpeg);
+
+	_jpeg_set_dest_frame(&jpeg, dest);
+
+	jpeg.image_width = src->width;
+	jpeg.image_height = src->height;
+	jpeg.input_components = 3;
+	jpeg.in_color_space = JCS_RGB;
+
+	jpeg_set_defaults(&jpeg);
+	jpeg_set_quality(&jpeg, quality, TRUE);
+
+	jpeg_start_compress(&jpeg, TRUE);
+
+#	define WRITE_SCANLINES(_format, _func) \
+		case _format: { _func(&jpeg, src); break; }
+
+	switch (src->format) {
+		// https://www.fourcc.org/yuv.php
+		WRITE_SCANLINES(V4L2_PIX_FMT_YUYV, _jpeg_write_scanlines_yuyv);
+		WRITE_SCANLINES(V4L2_PIX_FMT_UYVY, _jpeg_write_scanlines_uyvy);
+		WRITE_SCANLINES(V4L2_PIX_FMT_RGB565, _jpeg_write_scanlines_rgb565);
+		WRITE_SCANLINES(V4L2_PIX_FMT_RGB24, _jpeg_write_scanlines_rgb24);
+		default: assert(0 && "Unsupported input format for CPU encoder");
+	}
+
+#	undef WRITE_SCANLINES
+
+	jpeg_finish_compress(&jpeg);
+	jpeg_destroy_compress(&jpeg);
+
+	frame_encoding_end(dest);
+}
+
+static void _jpeg_set_dest_frame(j_compress_ptr jpeg, frame_s *frame) {
+	if (jpeg->dest == NULL) {
+		assert((jpeg->dest = (struct jpeg_destination_mgr *)(*jpeg->mem->alloc_small)(
+			(j_common_ptr) jpeg, JPOOL_PERMANENT, sizeof(_jpeg_dest_manager_s)
+		)));
+	}
+
+	_jpeg_dest_manager_s *dest = (_jpeg_dest_manager_s *)jpeg->dest;
+	dest->mgr.init_destination = _jpeg_init_destination;
+	dest->mgr.empty_output_buffer = _jpeg_empty_output_buffer;
+	dest->mgr.term_destination = _jpeg_term_destination;
+	dest->frame = frame;
+
+	frame->used = 0;
+}
+
+#define YUV_R(_y, _, _v)	(((_y) + (359 * (_v))) >> 8)
+#define YUV_G(_y, _u, _v)	(((_y) - (88 * (_u)) - (183 * (_v))) >> 8)
+#define YUV_B(_y, _u, _)	(((_y) + (454 * (_u))) >> 8)
+#define NORM_COMPONENT(_x)	(((_x) > 255) ? 255 : (((_x) < 0) ? 0 : (_x)))
+
+static void _jpeg_write_scanlines_yuyv(struct jpeg_compress_struct *jpeg, const frame_s *frame) {
+	uint8_t *line_buf;
+	A_CALLOC(line_buf, frame->width * 3);
+
+	const unsigned padding = frame_get_padding(frame);
+	const uint8_t *data = frame->data;
+	unsigned z = 0;
+
+	while (jpeg->next_scanline < frame->height) {
+		uint8_t *ptr = line_buf;
+
+		for (unsigned x = 0; x < frame->width; ++x) {
+			int y = (!z ? data[0] << 8 : data[2] << 8);
+			int u = data[1] - 128;
+			int v = data[3] - 128;
+
+			int r = YUV_R(y, u, v);
+			int g = YUV_G(y, u, v);
+			int b = YUV_B(y, u, v);
+
+			*(ptr++) = NORM_COMPONENT(r);
+			*(ptr++) = NORM_COMPONENT(g);
+			*(ptr++) = NORM_COMPONENT(b);
+
+			if (z++) {
+				z = 0;
+				data += 4;
+			}
+		}
+		data += padding;
+
+		JSAMPROW scanlines[1] = {line_buf};
+		jpeg_write_scanlines(jpeg, scanlines, 1);
+	}
+
+	free(line_buf);
+}
+
+static void _jpeg_write_scanlines_uyvy(struct jpeg_compress_struct *jpeg, const frame_s *frame) {
+	uint8_t *line_buf;
+	A_CALLOC(line_buf, frame->width * 3);
+
+	const unsigned padding = frame_get_padding(frame);
+	const uint8_t *data = frame->data;
+	unsigned z = 0;
+
+	while (jpeg->next_scanline < frame->height) {
+		uint8_t *ptr = line_buf;
+
+		for (unsigned x = 0; x < frame->width; ++x) {
+			int y = (!z ? data[1] << 8 : data[3] << 8);
+			int u = data[0] - 128;
+			int v = data[2] - 128;
+
+			int r = YUV_R(y, u, v);
+			int g = YUV_G(y, u, v);
+			int b = YUV_B(y, u, v);
+
+			*(ptr++) = NORM_COMPONENT(r);
+			*(ptr++) = NORM_COMPONENT(g);
+			*(ptr++) = NORM_COMPONENT(b);
+
+			if (z++) {
+				z = 0;
+				data += 4;
+			}
+		}
+		data += padding;
+
+		JSAMPROW scanlines[1] = {line_buf};
+		jpeg_write_scanlines(jpeg, scanlines, 1);
+	}
+
+	free(line_buf);
+}
+
+#undef NORM_COMPONENT
+#undef YUV_B
+#undef YUV_G
+#undef YUV_R
+
+static void _jpeg_write_scanlines_rgb565(struct jpeg_compress_struct *jpeg, const frame_s *frame) {
+	uint8_t *line_buf;
+	A_CALLOC(line_buf, frame->width * 3);
+
+	const unsigned padding = frame_get_padding(frame);
+	const uint8_t *data = frame->data;
+
+	while (jpeg->next_scanline < frame->height) {
+		uint8_t *ptr = line_buf;
+
+		for (unsigned x = 0; x < frame->width; ++x) {
+			unsigned int two_byte = (data[1] << 8) + data[0];
+
+			*(ptr++) = data[1] & 248; // Red
+			*(ptr++) = (uint8_t)((two_byte & 2016) >> 3); // Green
+			*(ptr++) = (data[0] & 31) * 8; // Blue
+
+			data += 2;
+		}
+		data += padding;
+
+		JSAMPROW scanlines[1] = {line_buf};
+		jpeg_write_scanlines(jpeg, scanlines, 1);
+	}
+
+	free(line_buf);
+}
+
+static void _jpeg_write_scanlines_rgb24(struct jpeg_compress_struct *jpeg, const frame_s *frame) {
+	const unsigned padding = frame_get_padding(frame);
+	uint8_t *data = frame->data;
+
+	while (jpeg->next_scanline < frame->height) {
+		JSAMPROW scanlines[1] = {data};
+		jpeg_write_scanlines(jpeg, scanlines, 1);
+
+		data += (jpeg->next_scanline * frame->width * 3) + padding;
+	}
+}
+
+#define JPEG_OUTPUT_BUFFER_SIZE ((size_t)4096)
+
+static void _jpeg_init_destination(j_compress_ptr jpeg) {
+	_jpeg_dest_manager_s *dest = (_jpeg_dest_manager_s *)jpeg->dest;
+
+	// Allocate the output buffer - it will be released when done with image
+	assert((dest->buf = (JOCTET *)(*jpeg->mem->alloc_small)(
+		(j_common_ptr) jpeg, JPOOL_IMAGE, JPEG_OUTPUT_BUFFER_SIZE * sizeof(JOCTET)
+	)));
+
+	dest->mgr.next_output_byte = dest->buf;
+	dest->mgr.free_in_buffer = JPEG_OUTPUT_BUFFER_SIZE;
+}
+
+static boolean _jpeg_empty_output_buffer(j_compress_ptr jpeg) {
+	// Called whenever local jpeg buffer fills up
+
+	_jpeg_dest_manager_s *dest = (_jpeg_dest_manager_s *)jpeg->dest;
+
+	frame_append_data(dest->frame, dest->buf, JPEG_OUTPUT_BUFFER_SIZE);
+
+	dest->mgr.next_output_byte = dest->buf;
+	dest->mgr.free_in_buffer = JPEG_OUTPUT_BUFFER_SIZE;
+
+	return TRUE;
+}
+
+static void _jpeg_term_destination(j_compress_ptr jpeg) {
+	// Called by jpeg_finish_compress after all data has been written.
+	// Usually needs to flush buffer.
+
+	_jpeg_dest_manager_s *dest = (_jpeg_dest_manager_s *)jpeg->dest;
+	size_t final = JPEG_OUTPUT_BUFFER_SIZE - dest->mgr.free_in_buffer;
+
+	// Write any data remaining in the buffer.
+	frame_append_data(dest->frame, dest->buf, final);
+}
+
+#undef JPEG_OUTPUT_BUFFER_SIZE