Bump version: 2.1 → 2.2

Fix two typos in log messages

.bumpversion.cfg

@@ -1,7 +1,7 @@
 [bumpversion]
 commit = True
 tag = True
-current_version = 0.42
+current_version = 2.2
 parse = (?P<major>\d+)\.(?P<minor>\d+)(\.(?P<patch>\d+)(\-(?P<release>[a-z]+))?)?
 serialize = 
 	{major}.{minor}
@@ -10,7 +10,10 @@ serialize =
 search = VERSION "{current_version}"
 replace = VERSION "{new_version}"
 
-[bumpversion:file:PKGBUILD]
+[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}

.dockerignore

@@ -0,0 +1,6 @@
+# Ignore everything
+*
+
+# Allow source code
+!Makefile
+!src/**

.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

@@ -1,9 +1,12 @@
-/pkg/
-/src/ustreamer-*/
-/src/v*.tar.gz
-/v*.tar.gz
-/ustreamer-*.pkg.tar.xz
+/linters/.tox/
+/linters/.mypy_cache/
+/pkg/arch/pkg/
+/pkg/arch/src/
+/pkg/arch/v*.tar.gz
+/pkg/arch/ustreamer-*.pkg.tar.xz
+/pkg/arch/ustreamer-*.pkg.tar.zst
+/build/
+/config.mk
 /vgcore.*
 /ustreamer
 /*.sock
-*.o

Makefile

@@ -1,63 +1,140 @@
+-include config.mk
+
+PROG ?= ustreamer
 DESTDIR ?=
 PREFIX ?= /usr/local
+
+CC ?= gcc
 CFLAGS ?= -O3
 LDFLAGS ?=
 
+RPI_VC_HEADERS ?= /opt/vc/include
+RPI_VC_LIBS ?= /opt/vc/lib
+
+BUILD ?= build
+
+LINTERS_IMAGE ?= $(PROG)-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
+_LIBS = -lm -ljpeg -pthread -levent -levent_pthreads -luuid
+override CFLAGS += -c -std=c11 -Wall -Wextra -D_GNU_SOURCE
+_SRCS = $(shell ls src/*.c src/http/*.c src/encoders/cpu/*.c src/encoders/hw/*.c)
 
 
-ifeq ($(shell ls -d /opt/vc/include 2>/dev/null), /opt/vc/include)
-SOURCES += $(shell ls src/omx/*.c)
-LIBS += -lbcm_host -lvcos -lopenmaxil -L/opt/vc/lib
-override CFLAGS += -DOMX_ENCODER -DOMX_SKIP64BIT -I/opt/vc/include
+define optbool
+$(filter $(shell echo $(1) | tr A-Z a-z), yes on 1)
+endef
+
+
+ifneq ($(call optbool,$(WITH_OMX)),)
+_LIBS += -lbcm_host -lvcos -lopenmaxil -L$(RPI_VC_LIBS)
+override CFLAGS += -DWITH_OMX -DOMX_SKIP64BIT -I$(RPI_VC_HEADERS)
+_SRCS += $(shell ls src/encoders/omx/*.c)
+endif
+
+
+ifneq ($(call optbool,$(WITH_GPIO)),)
+_LIBS += -lgpiod
+override CFLAGS += -DWITH_GPIO
+_SRCS += $(shell ls src/gpio/*.c)
+endif
+
+
+WITH_PTHREAD_NP ?= 1
+ifneq ($(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)
+_LIBS += -lbsd
+endif
+override CFLAGS += -DWITH_SETPROCTITLE
 endif
 
 
 # =====
-all: $(SOURCES) $(PROG)
+all: $(PROG)
 
 
 install: $(PROG)
 	install -Dm755 $(PROG) $(DESTDIR)$(PREFIX)/bin/$(PROG)
 
 
+install-strip: install
+	strip $(DESTDIR)$(PREFIX)/bin/$(PROG)
+
+
+uninstall:
+	rm $(DESTDIR)$(PREFIX)/bin/$(PROG)
+
+
 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
+	tools/make-jpeg-h.py src/http/data/blank.jpeg src/http/data/blank_jpeg.h BLANK
+	tools/make-html-h.py src/http/data/index.html src/http/data/index_html.h INDEX
 
 
-$(PROG): $(OBJECTS)
-	$(CC) $(LIBS) $(LDFLAGS) $(OBJECTS) -o $@
+$(PROG): $(_SRCS:%.c=$(BUILD)/%.o)
+	$(info -- LD $@)
+	@ $(CC) $^ -o $@ $(LDFLAGS) $(_LIBS)
+	$(info ===== Build complete =====)
+	$(info == CC      = $(CC))
+	$(info == LIBS    = $(_LIBS))
+	$(info == CFLAGS  = $(CFLAGS))
+	$(info == LDFLAGS = $(LDFLAGS))
 
 
-.c.o:
-	$(CC) $(LIBS) $(CFLAGS) $< -o $@
+$(BUILD)/%.o: %.c
+	$(info -- CC $<)
+	@ mkdir -p $(dir $@) || true
+	@ $(CC) $< -o $@ $(CFLAGS)
 
 
 release:
 	make clean
+	make tox
 	make push
-	make bump
+	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.* *.sock $(PROG)
-	rm -rf pkg src/$(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 -rf $(PROG) $(BUILD) vgcore.* *.sock
+
+.PHONY: linters

PKGBUILD

@@ -1,30 +0,0 @@
-# Contributor: Maxim Devaev <mdevaev@gmail.com>
-# Author: Maxim Devaev <mdevaev@gmail.com>
-
-
-pkgname=ustreamer
-pkgver=0.42
-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

@@ -1,8 +1,11 @@
 # 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 [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/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:
 
@@ -10,23 +13,20 @@
 |----------|---------------|-------------------|
 | 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 |
+| 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 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 | ![#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 the traffic | ![#00aa00](https://placehold.it/15/00aa00/000000?text=+) Yes <sup>2</sup> | ![#f03c15](https://placehold.it/15/f03c15/000000?text=+) No |
 | Streaming via UNIX domain socket | ![#00aa00](https://placehold.it/15/00aa00/000000?text=+) Yes | ![#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 |
+| Debug logs without recompiling,<br>performance statistics log,<br>access to HTTP streaming parameters | ![#00aa00](https://placehold.it/15/00aa00/000000?text=+) Yes | ![#f03c15](https://placehold.it/15/f03c15/000000?text=+) No |
+| Option to serve files<br>with a built-in HTTP server | ![#00aa00](https://placehold.it/15/00aa00/000000?text=+) Yes | ![#ffaa00](https://placehold.it/15/ffaa00/000000?text=+) Regular files only |
+| Signaling about the stream state<br>on GPIO using [libgpiod](https://git.kernel.org/pub/scm/libs/libgpiod/libgpiod.git/about) | ![#00aa00](https://placehold.it/15/00aa00/000000?text=+) Yes | ![#f03c15](https://placehold.it/15/f03c15/000000?text=+) No |
 | 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 |
+| Compatibility with mjpg-streamer's API | ![#00aa00](https://placehold.it/15/00aa00/000000?text=+) Yes | :) |
 
 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
@@ -34,38 +34,54 @@ 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, ```libjpeg8```/```libjpeg-turbo```, ```libuuid``` 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 uuid-dev libbsd-dev`. Add `libraspberrypi-dev` for `WITH_OMX=1` and `libgpiod` for `WITH_GPIO=1`.
+* Debian: `sudo apt install build-essential libevent-dev libjpeg62-turbo-dev uuid-dev libbsd-dev`.
+* Ubuntu 20.04 x86_64: `sudo apt install build-essential libevent-dev libjpeg62-dev uuid-dev libbsd-dev make gcc libjpeg8 libjpeg-turbo8 libuuid1 libbsd0`.
+
+On Raspberry Pi you can build the program with OpenMAX IL. To do this pass option ```WITH_OMX=1``` to ```make```. 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. It should compile automatically with OpenMAX IL on Raspberry Pi, if the corresponding headers are present in ```/opt/vc/include```.  
+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:
+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
+    --workers=3 \ # Maximum workers for OpenMAX
+    --persistent \ # Don't re-initialize device on timeout (for example when HDMI cable was disconnected)
     --dv-timings \ # Use DV-timings
-    --quality=20 \ # OpenMAX has a non-linear quality scale
-    --drop-same-frames=30 # Save that traffic
+    --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```.
 
+-----
+# See also
+* [Running uStreamer via systemd service](https://github.com/pikvm/ustreamer/issues/16).
+* [uStreamer Ansible Role](https://github.com/mtlynch/ansible-role-ustreamer): Use [Ansible](https://docs.ansible.com/ansible/latest/index.html) to compile uStreamer and install it as a systemd service automatically.
+
 -----
 # License
 Copyright (C) 2018 by Maxim Devaev mdevaev@gmail.com

README.ru.md

@@ -1,8 +1,11 @@
-# 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 [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/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:
 
@@ -10,42 +13,45 @@
 |----------|---------------|-------------------|
 | 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> |
+| Поведение при физическом отключении<br>устройства 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-new/userspace-api/v4l/dv-timings.html) - возможности<br>изменения  параметров разрешения<br>трансляции на лету по сигналу<br>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 |
 | Стрим через UNIX domain socket | ![#00aa00](https://placehold.it/15/00aa00/000000?text=+) Есть | ![#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 |
+| Возможность сервить файлы встроенным<br>HTTP-сервером  | ![#00aa00](https://placehold.it/15/00aa00/000000?text=+) Есть | ![#ffaa00](https://placehold.it/15/ffaa00/000000?text=+) Нет каталогов |
+| Вывод сигналов о состоянии стрима на GPIO<br>с помощью [libgpiod](https://git.kernel.org/pub/scm/libs/libgpiod/libgpiod.git/about) | ![#00aa00](https://placehold.it/15/00aa00/000000?text=+) Есть | ![#f03c15](https://placehold.it/15/f03c15/000000?text=+) Нет |
 | 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 |
+| Совместимость с API mjpg-streamer'а | ![#00aa00](https://placehold.it/15/00aa00/000000?text=+) Есть | :) |
 
 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```, ```libuuid``` 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 uuid-dev libbsd-dev`.  Добавьте `libraspberrypi-dev` для сборки с `WITH_OMX=1` и `libgpiod` для `WITH_GPIO=1`.
+* Debian: `sudo apt install build-essential libevent-dev libjpeg62-turbo-dev uuid-dev libbsd-dev`.
+* Ubuntu 20.04 x86_64: `sudo apt install build-essential libevent-dev libjpeg62-dev uuid-dev libbsd-dev make gcc libjpeg8 libjpeg-turbo8 libuuid1 libbsd0`.
+
+На Raspberry Pi программу можно собрать с поддержкой OpenMAX IL. Для этого передайте ```make``` параметр ```WITH_OMX=1```. 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. На Raspberry Pi програма автоматически собирается с поддержкой OpenMAX IL, если обнаружит нужные хедеры в ```/opt/vc/include```.  
+Порт для FreeBSD: https://www.freshports.org/multimedia/ustreamer.
 
 -----
 # Использование
@@ -54,18 +60,28 @@ $ ./ustreamer --help
 # ./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
+    --workers=3 \ # Максимум воркеров для OpenMAX
+    --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```.
 
+-----
+# Смотрите также
+* [Запуск с помощью systemd-сервиса](https://github.com/pikvm/ustreamer/issues/16).
+* [uStreamer Ansible Role](https://github.com/mtlynch/ansible-role-ustreamer): Использование [Ansible](https://docs.ansible.com/ansible/latest/index.html) для сборки и установки стримера как systemd-сервиса.
+
 -----
 # Лицензия
 Copyright (C) 2018 by Maxim Devaev mdevaev@gmail.com

linters/.dockerignore

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

linters/Dockerfile

@@ -0,0 +1,24 @@
+FROM archlinux/base
+
+RUN echo "Server = http://mirror.yandex.ru/archlinux/\$repo/os/\$arch" > /etc/pacman.d/mirrorlist
+
+RUN pacman -Syu --noconfirm \
+	&& pacman -S --needed --noconfirm \
+		base \
+		base-devel \
+		vim \
+		git \
+		libjpeg \
+		libevent \
+		libutil-linux \
+		libbsd \
+		python \
+		python-pip \
+		python-tox \
+		cppcheck \
+		npm \
+	&& (pacman -Sc --noconfirm || true)
+
+RUN npm install htmlhint -g
+
+CMD /bin/bash

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 = 3.8
+ignore_missing_imports = true
+disallow_untyped_defs = true
+strict_optional = true

linters/pylint.ini

@@ -0,0 +1,63 @@
+[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,
+
+[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 +1,50 @@
+[tox]
+envlist = cppcheck, flake8, pylint, mypy, vulture, htmlhint
+skipsdist = true
+
+[testenv]
+basepython = python3.8
+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 \
+			-DCHAR_BIT=8 \
+		src
+
+[testenv:flake8]
+whitelist_externals = bash
+commands = bash -c 'flake8 --config=linters/flake8.ini tools/*.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'
+deps =
+	pylint
+
+[testenv:mypy]
+whitelist_externals = bash
+commands = bash -c 'mypy --config-file=linters/mypy.ini tools/*.py'
+deps =
+	mypy
+
+[testenv:vulture]
+whitelist_externals = bash
+commands = bash -c 'vulture tools/*.py'
+deps =
+	vulture
+
+[testenv:htmlhint]
+whitelist_externals = htmlhint
+commands = htmlhint src/http/data/*.html

pkg/arch/PKGBUILD

@@ -0,0 +1,34 @@
+# Contributor: Maxim Devaev <mdevaev@gmail.com>
+# Author: Maxim Devaev <mdevaev@gmail.com>
+
+
+pkgname=ustreamer
+pkgver=2.2
+pkgrel=1
+pkgdesc="Lightweight and fast MJPG-HTTP streamer"
+url="https://github.com/pikvm/ustreamer"
+license=(GPL)
+arch=(i686 x86_64 armv6h armv7h aarch64)
+depends=(libjpeg libevent libutil-linux libbsd libgpiod)
+# optional: raspberrypi-firmware for OMX encoder
+makedepends=(gcc make)
+source=(${pkgname}::"git+https://github.com/pikvm/ustreamer#commit=v${pkgver}")
+md5sums=(SKIP)
+
+
+build() {
+	cd "$srcdir"
+	rm -rf $pkgname-build
+	cp -r $pkgname $pkgname-build
+	cd $pkgname-build
+
+	local _options="WITH_GPIO=1"
+	[ -e /opt/vc/include/IL/OMX_Core.h ] && _options="$_options WITH_OMX=1"
+
+	make $_options CFLAGS="$CFLAGS" LDFLAGS="$LDFLAGS" $MAKEFLAGS
+}
+
+package() {
+	cd "$srcdir/$pkgname-build"
+	make DESTDIR="$pkgdir" PREFIX=/usr install
+}

pkg/docker/Dockerfile.arm.cross

@@ -0,0 +1,41 @@
+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 \
+		libraspberrypi-dev \
+		libgpiod-dev \
+	&& rm -rf /var/lib/apt/lists/*
+
+WORKDIR /build/ustreamer/
+COPY . .
+RUN make -j5 WITH_OMX=1 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 \
+		uuid \
+		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 +1,34 @@
+FROM balenalib/raspberrypi3-debian:build as build
+
+RUN apt-get update \
+	&& apt-get install -y --no-install-recommends \
+		gcc \
+		libjpeg8-dev \
+		libbsd-dev \
+		libraspberrypi-dev \
+		libgpiod-dev \
+	&& rm -rf /var/lib/apt/lists/*
+
+WORKDIR /build/ustreamer/
+COPY . .
+RUN make -j5 WITH_OMX=1 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 \
+		uuid \
+		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 +1,40 @@
+FROM debian:buster-slim as build
+
+RUN apt-get update \
+	&& apt-get install -y \
+		ca-certificates \
+		make \
+		gcc \
+		git \
+		libevent-dev \
+		libjpeg62-turbo-dev \
+		uuid-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 \
+		uuid \
+		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 +1,28 @@
+# 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 MJPG-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
+	>=sys-apps/util-linux-2.33
+	>=dev-libs/libbsd-0.9.1
+"
+RDEPEND="${DEPEND}"
+BDEPEND=""
+ 
+src_install() {
+	dobin ustreamer 
+}

pkg/openwrt/Makefile

@@ -0,0 +1,45 @@
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=ustreamer
+PKG_VERSION:=2.2
+PKG_RELEASE:=1
+PKG_MAINTAINER:=Maxim Devaev <mdevaev@gmail.com>
+
+PKG_SOURCE_PROTO:=git
+PKG_SOURCE_URL:=https://github.com/pikvm/ustreamer.git
+PKG_SOURCE_VERSION:=v$(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 +libuuid +libbsd +libevent2 +libevent2-core +libevent2-extra +libevent2-pthreads
+  URL:=https://github.com/pikvm/ustreamer
+endef
+
+define Package/ustreamer/description
+ µStreamer - Lightweight and fast MJPG-HTTP streamer
+endef
+
+define Package/ustreamer/install
+	$(INSTALL_DIR) $(1)/usr/bin
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/ustreamer $(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
+}

src/config.h

@@ -1,4 +1,5 @@
 /*****************************************************************************
+#                                                                            #
 #    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
 #                                                                            #
 #    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
@@ -21,4 +22,6 @@
 
 #pragma once
 
-#define VERSION "0.42"
+#ifndef VERSION
+#	define VERSION "2.2"
+#endif

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[] = {
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-	0x0, 0x0, 0x0, 0x7, 0xff, 0xd9
-};

src/data/index.html

@@ -1,59 +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="/state"><b><samp>/state</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>key=abc123</samp></b><br>
-					User-defined key, which is part of cookie <samp>stream_client</samp>, which allows<br>
-					the stream client to determine its identifier and view statistics using <a href="/state"><samp>/state</samp></a>.
-				</li>
-				<br>
-				<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 frame 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

@@ -1,4 +1,5 @@
 /*****************************************************************************
+#                                                                            #
 #    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
 #                                                                            #
 #    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
@@ -19,6 +20,8 @@
 *****************************************************************************/
 
 
+#include "device.h"
+
 #include <stdlib.h>
 #include <stddef.h>
 #include <stdbool.h>
@@ -26,14 +29,21 @@
 #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 <linux/videodev2.h>
+#include <linux/v4l2-controls.h>
 
 #include "tools.h"
 #include "logging.h"
+#include "threading.h"
 #include "xioctl.h"
-#include "device.h"
+#include "picture.h"
 
 
 static const struct {
@@ -53,6 +63,17 @@ static const struct {
 	{"YUYV",	V4L2_PIX_FMT_YUYV},
 	{"UYVY",	V4L2_PIX_FMT_UYVY},
 	{"RGB565",	V4L2_PIX_FMT_RGB565},
+	{"RGB24",	V4L2_PIX_FMT_RGB24},
+	{"JPEG",	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},
 };
 
 
@@ -60,18 +81,34 @@ 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 void _device_open_hw_fps(struct device_t *dev);
+static int _device_open_io_method(struct device_t *dev);
+static int _device_open_io_method_mmap(struct device_t *dev);
+static int _device_open_io_method_userptr(struct device_t *dev);
 static int _device_open_queue_buffers(struct device_t *dev);
+static void _device_open_alloc_picbufs(struct device_t *dev);
+static int _device_apply_resolution(struct device_t *dev, unsigned width, unsigned height);
 
-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);
+static void _device_apply_controls(struct device_t *dev);
+static int _device_query_control(struct device_t *dev, struct v4l2_queryctrl *query, const char *name, unsigned cid, bool quiet);
+static void _device_set_control(struct device_t *dev, struct v4l2_queryctrl *query, const char *name, unsigned cid, int value, bool quiet);
+
+static const char *_format_to_string_fourcc(char *buf, size_t size, unsigned format);
+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);
 
 
-struct device_t *device_init() {
+struct device_t *device_init(void) {
 	struct device_runtime_t *run;
 	struct device_t *dev;
+	long cores_sysconf;
+	unsigned cores_available;
+
+	cores_sysconf = sysconf(_SC_NPROCESSORS_ONLN);
+	cores_sysconf = (cores_sysconf < 0 ? 0 : cores_sysconf);
+	cores_available = max_u(min_u(cores_sysconf, 4), 1);
 
 	A_CALLOC(run, 1);
 	run->fd = -1;
@@ -82,10 +119,12 @@ struct device_t *device_init() {
 	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->n_buffers = cores_available + 1;
+	dev->n_workers = min_u(cores_available, dev->n_buffers);
+	dev->min_frame_size = 128;
 	dev->timeout = 1;
 	dev->error_delay = 1;
+	dev->io_method = V4L2_MEMORY_MMAP;
 	dev->run = run;
 	return dev;
 }
@@ -95,8 +134,8 @@ void device_destroy(struct device_t *dev) {
 	free(dev);
 }
 
-int device_parse_format(const char *const str) {
-	for (unsigned index = 0; index < sizeof(_FORMATS) / sizeof(_FORMATS[0]); ++index) {
+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;
 		}
@@ -104,8 +143,8 @@ int device_parse_format(const char *const str) {
 	return FORMAT_UNKNOWN;
 }
 
-v4l2_std_id device_parse_standard(const char *const str) {
-	for (unsigned index = 1; index < sizeof(_STANDARDS) / sizeof(_STANDARDS[0]); ++index) {
+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;
 		}
@@ -113,6 +152,15 @@ v4l2_std_id device_parse_standard(const char *const str) {
 	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(struct device_t *dev) {
 	if ((dev->run->fd = open(dev->path, O_RDWR|O_NONBLOCK)) < 0) {
 		LOG_PERROR("Can't open device");
@@ -129,13 +177,17 @@ int device_open(struct device_t *dev) {
 	if (_device_open_format(dev) < 0) {
 		goto error;
 	}
-	if (_device_open_mmap(dev) < 0) {
+	_device_open_hw_fps(dev);
+	if (_device_open_io_method(dev) < 0) {
 		goto error;
 	}
 	if (_device_open_queue_buffers(dev) < 0) {
 		goto error;
 	}
 	_device_open_alloc_picbufs(dev);
+	_device_apply_controls(dev);
+
+	dev->run->n_workers = min_u(dev->run->n_buffers, dev->n_workers);
 
 	LOG_DEBUG("Device fd=%d initialized", dev->run->fd);
 	return 0;
@@ -146,24 +198,36 @@ int device_open(struct device_t *dev) {
 }
 
 void device_close(struct device_t *dev) {
+	dev->run->n_workers = 0;
+
 	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;
+		for (unsigned index = 0; index < dev->run->n_buffers; ++index) {
+			picture_destroy(dev->run->pictures[index]);
 		}
 		free(dev->run->pictures);
 		dev->run->pictures = NULL;
 	}
 
 	if (dev->run->hw_buffers) {
-		LOG_DEBUG("Unmapping HW buffers ...");
+		LOG_DEBUG("Releasing device 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);
+#			define HW_BUFFER(_next) dev->run->hw_buffers[index]._next
+
+			if (dev->io_method == V4L2_MEMORY_MMAP) {
+				if (HW_BUFFER(allocated) > 0 && HW_BUFFER(data) != MAP_FAILED) {
+					if (munmap(HW_BUFFER(data), HW_BUFFER(allocated)) < 0) {
+						LOG_PERROR("Can't unmap device buffer %u", index);
+					}
+				}
+			} else { // V4L2_MEMORY_USERPTR
+				if (HW_BUFFER(data)) {
+					free(HW_BUFFER(data));
 				}
 			}
+			A_MUTEX_DESTROY(&HW_BUFFER(grabbed_mutex));
+
+#			undef HW_BUFFER
 		}
 		dev->run->n_buffers = 0;
 		free(dev->run->hw_buffers);
@@ -181,6 +245,137 @@ void device_close(struct device_t *dev) {
 	}
 }
 
+int device_switch_capturing(struct device_t *dev, 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;
+}
+
+int device_select(struct device_t *dev, bool *has_read, bool *has_write, bool *has_error) {
+	struct timeval timeout;
+	int retval;
+
+#	define INIT_FD_SET(_set) \
+		fd_set _set; FD_ZERO(&_set); FD_SET(dev->run->fd, &_set);
+
+	INIT_FD_SET(read_fds);
+	INIT_FD_SET(write_fds);
+	INIT_FD_SET(error_fds);
+
+#	undef INIT_FD_SET
+
+	timeout.tv_sec = dev->timeout;
+	timeout.tv_usec = 0;
+
+	LOG_DEBUG("Calling select() on video device ...");
+
+	retval = select(dev->run->fd + 1, &read_fds, &write_fds, &error_fds, &timeout);
+	if (retval > 0) {
+		*has_read = FD_ISSET(dev->run->fd, &read_fds);
+		*has_write = FD_ISSET(dev->run->fd, &write_fds);
+		*has_error = FD_ISSET(dev->run->fd, &error_fds);
+	} else {
+		*has_read = false;
+		*has_write = false;
+		*has_error = false;
+	}
+
+	LOG_DEBUG("Device select() --> %d", retval);
+	return retval;
+}
+
+int device_grab_buffer(struct device_t *dev) {
+	struct v4l2_buffer buf_info;
+
+	MEMSET_ZERO(buf_info);
+	buf_info.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	buf_info.memory = dev->io_method;
+
+	LOG_DEBUG("Grabbing device buffer ...");
+	if (xioctl(dev->run->fd, VIDIOC_DQBUF, &buf_info) < 0) {
+		LOG_PERROR("Unable to grab device buffer");
+		return -1;
+	}
+
+	LOG_DEBUG("Grabbed new frame in device buffer: index=%u, bytesused=%u",
+		buf_info.index, buf_info.bytesused);
+
+	if (buf_info.index >= dev->run->n_buffers) {
+		LOG_ERROR("V4L2 error: grabbed invalid device buffer: index=%u, nbuffers=%u",
+			buf_info.index, dev->run->n_buffers);
+		return -1;
+	}
+
+#	define HW_BUFFER(_next) dev->run->hw_buffers[buf_info.index]._next
+
+	A_MUTEX_LOCK(&HW_BUFFER(grabbed_mutex));
+	if (HW_BUFFER(grabbed)) {
+		LOG_ERROR("V4L2 error: grabbed device buffer is already used: index=%u, bytesused=%u",
+			buf_info.index, buf_info.bytesused);
+		A_MUTEX_UNLOCK(&HW_BUFFER(grabbed_mutex));
+		return -1;
+	}
+	HW_BUFFER(grabbed) = true;
+	A_MUTEX_UNLOCK(&HW_BUFFER(grabbed_mutex));
+
+	HW_BUFFER(used) = buf_info.bytesused;
+	memcpy(&HW_BUFFER(buf_info), &buf_info, sizeof(struct v4l2_buffer));
+	dev->run->pictures[buf_info.index]->grab_ts = get_now_monotonic();
+
+#	undef HW_BUFFER
+	return buf_info.index;
+}
+
+int device_release_buffer(struct device_t *dev, unsigned index) {
+#	define HW_BUFFER(_next) dev->run->hw_buffers[index]._next
+
+	LOG_DEBUG("Releasing device buffer index=%u ...", index);
+
+	A_MUTEX_LOCK(&HW_BUFFER(grabbed_mutex));
+	if (xioctl(dev->run->fd, VIDIOC_QBUF, &HW_BUFFER(buf_info)) < 0) {
+		LOG_PERROR("Unable to release device buffer index=%u", index);
+		A_MUTEX_UNLOCK(&HW_BUFFER(grabbed_mutex));
+		return -1;
+	}
+	HW_BUFFER(grabbed) = false;
+	A_MUTEX_UNLOCK(&HW_BUFFER(grabbed_mutex));
+	HW_BUFFER(used) = 0;
+
+#	undef HW_BUFFER
+	return 0;
+}
+
+int device_consume_event(struct device_t *dev) {
+	struct v4l2_event event;
+
+	LOG_DEBUG("Calling ioctl(VIDIOC_DQEVENT) ...");
+	if (xioctl(dev->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(struct device_t *dev) {
 	struct v4l2_capability cap;
 	int input = dev->input; // Needs pointer to int for ioctl()
@@ -194,7 +389,7 @@ static int _device_open_check_cap(struct device_t *dev) {
 	}
 
 	if (!(cap.capabilities & V4L2_CAP_VIDEO_CAPTURE)) {
-		LOG_ERROR("Video capture not supported by our device");
+		LOG_ERROR("Video capture not supported by the device");
 		return -1;
 	}
 
@@ -222,8 +417,9 @@ static int _device_open_check_cap(struct device_t *dev) {
 }
 
 static int _device_open_dv_timings(struct device_t *dev) {
+	_device_apply_resolution(dev, dev->width, dev->height);
 	if (dev->dv_timings) {
-		LOG_DEBUG("Using DV-timings");
+		LOG_DEBUG("Using DV timings");
 
 		if (_device_apply_dv_timings(dev) < 0) {
 			return -1;
@@ -239,36 +435,29 @@ static int _device_open_dv_timings(struct device_t *dev) {
 			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;
+	struct v4l2_dv_timings dv;
 
-	MEMSET_ZERO(dv_timings);
+	MEMSET_ZERO(dv);
 
 	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
-		);
+	if (xioctl(dev->run->fd, VIDIOC_QUERY_DV_TIMINGS, &dv) == 0) {
+		LOG_INFO("Got new DV timings: resolution=%ux%u, pixclk=%llu",
+			dv.bt.width, dv.bt.height, (unsigned long long)dv.bt.pixelclock); // Issue #11
 
 		LOG_DEBUG("Calling ioctl(VIDIOC_S_DV_TIMINGS) ...");
-		if (xioctl(dev->run->fd, VIDIOC_S_DV_TIMINGS, &dv_timings) < 0) {
+		if (xioctl(dev->run->fd, VIDIOC_S_DV_TIMINGS, &dv) < 0) {
 			LOG_PERROR("Failed to set DV timings");
 			return -1;
 		}
 
-		dev->run->width = dv_timings.bt.width;
-		dev->run->height = dv_timings.bt.height;
+		if (_device_apply_resolution(dev, dv.bt.width, dv.bt.height) < 0) {
+			return -1;
+		}
 
 	} else {
 		LOG_DEBUG("Calling ioctl(VIDIOC_QUERYSTD) ...");
@@ -296,53 +485,113 @@ static int _device_open_format(struct device_t *dev) {
 	// 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),
+		LOG_PERROR("Unable to set pixelformat=%s, resolution=%ux%u",
+			_format_to_string_supported(dev->format),
 			dev->run->width,
-			dev->run->height
-		);
+			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);
+		LOG_ERROR("Requested resolution=%ux%u 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);
+	if (_device_apply_resolution(dev, fmt.fmt.pix.width, fmt.fmt.pix.height) < 0) {
+		return -1;
+	}
+	LOG_INFO("Using resolution: %ux%u", 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)
-		);
+		LOG_ERROR("Could not obtain the requested pixelformat=%s; driver gave us %s",
+			_format_to_string_supported(dev->format),
+			_format_to_string_supported(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
-			);
+		if ((format_str_nullable = (char *)_format_to_string_nullable(fmt.fmt.pix.pixelformat)) != NULL) {
+			LOG_INFO("Falling back to pixelformat=%s", format_str_nullable);
 		} else {
-			LOG_ERROR("Unsupported pixel format");
+			LOG_ERROR("Unsupported pixelformat=%s (fourcc)",
+				_format_to_string_fourcc(format_obtained_str, 8, fmt.fmt.pix.pixelformat));
 			return -1;
 		}
 	}
+
 	dev->run->format = fmt.fmt.pix.pixelformat;
+	LOG_INFO("Using pixelformat: %s", _format_to_string_supported(dev->run->format));
+
+	dev->run->raw_size = fmt.fmt.pix.sizeimage; // Only for userptr
 	return 0;
 }
 
-static int _device_open_mmap(struct device_t *dev) {
+static void _device_open_hw_fps(struct device_t *dev) {
+	struct v4l2_streamparm setfps;
+
+	dev->run->hw_fps = 0;
+
+	MEMSET_ZERO(setfps);
+	setfps.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+	LOG_DEBUG("Calling ioctl(VIDIOC_G_PARM) ...");
+	if (xioctl(dev->run->fd, VIDIOC_G_PARM, &setfps) < 0) {
+		if (errno == ENOTTY) { // Quiet message for Auvidea B101
+			LOG_INFO("Querying HW FPS changing is not supported");
+		} else {
+			LOG_PERROR("Unable to 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(dev->run->fd, VIDIOC_S_PARM, &setfps) < 0) {
+		LOG_PERROR("Unable to 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;
+	}
+
+	dev->run->hw_fps = SETFPS_TPF(denominator);
+	if (dev->desired_fps != dev->run->hw_fps) {
+		LOG_INFO("Using HW FPS: %u -> %u (coerced)", dev->desired_fps, dev->run->hw_fps);
+	} else {
+		LOG_INFO("Using HW FPS: %u", dev->run->hw_fps);
+	}
+
+#	undef SETFPS_TPF
+}
+
+static int _device_open_io_method(struct device_t *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(struct device_t *dev) {
 	struct v4l2_requestbuffers req;
 
 	MEMSET_ZERO(req);
@@ -350,20 +599,20 @@ static int _device_open_mmap(struct device_t *dev) {
 	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);
+	LOG_DEBUG("Calling ioctl(VIDIOC_REQBUFS) for V4L2_MEMORY_MMAP ...");
+	if (xioctl(dev->run->fd, VIDIOC_REQBUFS, &req) < 0) {
+		LOG_PERROR("Device '%s' doesn't support V4L2_MEMORY_MMAP", dev->path);
 		return -1;
 	}
 
 	if (req.count < 1) {
-		LOG_ERROR("Insufficient buffer memory: %d", req.count);
+		LOG_ERROR("Insufficient buffer memory: %u", req.count);
 		return -1;
 	} else {
-		LOG_INFO("Requested %d HW buffers, got %d", dev->n_buffers, req.count);
+		LOG_INFO("Requested %u device buffers, got %u", dev->n_buffers, req.count);
 	}
 
-	LOG_DEBUG("Allocating HW buffers ...");
+	LOG_DEBUG("Allocating device 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) {
@@ -374,19 +623,63 @@ static int _device_open_mmap(struct device_t *dev) {
 		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);
+		LOG_DEBUG("Calling ioctl(VIDIOC_QUERYBUF) for device buffer %u ...", 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);
+#		define HW_BUFFER(_next) dev->run->hw_buffers[dev->run->n_buffers]._next
+
+		A_MUTEX_INIT(&HW_BUFFER(grabbed_mutex));
+
+		LOG_DEBUG("Mapping device buffer %u ...", dev->run->n_buffers);
+		HW_BUFFER(data) = mmap(NULL, buf_info.length, PROT_READ|PROT_WRITE, MAP_SHARED, dev->run->fd, buf_info.m.offset);
+		if (HW_BUFFER(data) == MAP_FAILED) {
+			LOG_PERROR("Can't map device buffer %u", dev->run->n_buffers);
 			return -1;
 		}
+		HW_BUFFER(allocated) = buf_info.length;
+
+#		undef HW_BUFFER
+	}
+	return 0;
+}
+
+static int _device_open_io_method_userptr(struct device_t *dev) {
+	struct v4l2_requestbuffers req;
+	unsigned page_size = getpagesize();
+	unsigned buf_size = align_size(dev->run->raw_size, page_size);
+
+	MEMSET_ZERO(req);
+	req.count = dev->n_buffers;
+	req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	req.memory = V4L2_MEMORY_USERPTR;
+
+	LOG_DEBUG("Calling ioctl(VIDIOC_REQBUFS) for V4L2_MEMORY_USERPTR ...");
+	if (xioctl(dev->run->fd, VIDIOC_REQBUFS, &req) < 0) {
+		LOG_PERROR("Device '%s' doesn't support V4L2_MEMORY_USERPTR", 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_buffers, req.count);
+	}
+
+	LOG_DEBUG("Allocating device 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) {
+#       define HW_BUFFER(_next) dev->run->hw_buffers[dev->run->n_buffers]._next
+
+		assert(HW_BUFFER(data) = aligned_alloc(page_size, buf_size));
+		memset(HW_BUFFER(data), 0, buf_size);
+		HW_BUFFER(allocated) = buf_size;
+
+#		undef HW_BUFFER
 	}
 	return 0;
 }
@@ -397,10 +690,14 @@ static int _device_open_queue_buffers(struct device_t *dev) {
 
 		MEMSET_ZERO(buf_info);
 		buf_info.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-		buf_info.memory = V4L2_MEMORY_MMAP;
+		buf_info.memory = dev->io_method;
 		buf_info.index = index;
+		if (dev->io_method == V4L2_MEMORY_USERPTR) {
+			buf_info.m.userptr = (unsigned long)dev->run->hw_buffers[index].data;
+			buf_info.length = dev->run->hw_buffers[index].allocated;
+		}
 
-		LOG_DEBUG("Calling ioctl(VIDIOC_QBUF) for buffer %d ...", index);
+		LOG_DEBUG("Calling ioctl(VIDIOC_QBUF) for buffer %u ...", index);
 		if (xioctl(dev->run->fd, VIDIOC_QBUF, &buf_info) < 0) {
 			LOG_PERROR("Can't VIDIOC_QBUF");
 			return -1;
@@ -410,24 +707,134 @@ static int _device_open_queue_buffers(struct device_t *dev) {
 }
 
 static void _device_open_alloc_picbufs(struct device_t *dev) {
+	size_t picture_size = picture_get_generous_size(dev->run->width, dev->run->height);
+
 	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;
+		dev->run->pictures[index] = picture_init();
+		LOG_DEBUG("Pre-allocating picture buffer %u sized %zu bytes... ", index, picture_size);
+		picture_realloc_data(dev->run->pictures[index], picture_size);
 	}
 }
 
-static const char *_format_to_string_auto(char *buf, const size_t size, const unsigned format) {
+static int _device_apply_resolution(struct device_t *dev, unsigned width, unsigned height) {
+	// Тут VIDEO_MIN_* не используются из-за странностей минимального разрешения при отсутствии сигнала
+	// у некоторых устройств, например Auvidea B101
+	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;
+	}
+	dev->run->width = width;
+	dev->run->height = height;
+	return 0;
+}
+
+static void _device_apply_controls(struct device_t *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_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(struct device_t *dev, struct v4l2_queryctrl *query, const char *name, unsigned cid, bool quiet) {
+	// cppcheck-suppress redundantPointerOp
+	MEMSET_ZERO(*query);
+	query->id = cid;
+
+	if (xioctl(dev->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(struct device_t *dev, struct v4l2_queryctrl *query, const char *name, unsigned cid, int value, bool quiet) {
+	struct v4l2_control ctl;
+
+	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;
+	}
+
+	MEMSET_ZERO(ctl);
+	ctl.id = cid;
+	ctl.value = value;
+
+	if (xioctl(dev->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_fourcc(char *buf, size_t size, 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[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';
@@ -438,8 +845,8 @@ static const char *_format_to_string_auto(char *buf, const size_t size, const un
 	return buf;
 }
 
-static const char *_format_to_string_null(const unsigned format) {
-    for (unsigned index = 0; index < sizeof(_FORMATS) / sizeof(_FORMATS[0]); ++index) {
+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;
 		}
@@ -447,11 +854,25 @@ static const char *_format_to_string_null(const unsigned format) {
     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 < sizeof(_STANDARDS) / sizeof(_STANDARDS[0]); ++index) {
+	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";
+}

src/device.h

@@ -1,4 +1,5 @@
 /*****************************************************************************
+#                                                                            #
 #    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
 #                                                                            #
 #    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
@@ -23,30 +24,39 @@
 
 #include <stddef.h>
 #include <stdbool.h>
-#include <signal.h>
 
+#include <pthread.h>
 #include <linux/videodev2.h>
 
+#include "picture.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		"UNKNOWN, PAL, NTSC, SECAM"
+#define STANDARDS_STR		"PAL, NTSC, SECAM"
 
 #define FORMAT_UNKNOWN	-1
-#define FORMATS_STR		"YUYV, UYVY, RGB565"
+#define FORMATS_STR		"YUYV, UYVY, RGB565, RGB24, JPEG"
+
+#define IO_METHOD_UNKNOWN	-1
+#define IO_METHODS_STR		"MMAP, USERPTR"
 
 
 struct hw_buffer_t {
-	void	*start;
-	size_t	length;
-};
+	unsigned char		*data;
+	size_t				used;
+	size_t				allocated;
+	struct v4l2_buffer	buf_info;
 
-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;
+	pthread_mutex_t grabbed_mutex;
+	bool			grabbed;
 };
 
 struct device_runtime_t {
@@ -54,14 +64,42 @@ struct device_runtime_t {
 	unsigned			width;
 	unsigned			height;
 	unsigned			format;
+	unsigned			hw_fps;
+	size_t				raw_size;
 	unsigned			n_buffers;
 	unsigned			n_workers;
 	struct hw_buffer_t	*hw_buffers;
-	struct picture_t	*pictures;
-	unsigned long		max_picture_size;
+	struct picture_t	**pictures;
 	bool				capturing;
 };
 
+enum control_mode_t {
+	CTL_MODE_NONE = 0,
+	CTL_MODE_VALUE,
+	CTL_MODE_AUTO,
+	CTL_MODE_DEFAULT,
+};
+
+struct control_t {
+	enum control_mode_t	mode;
+	int					value;
+};
+
+struct controls_t {
+	struct control_t brightness;
+	struct control_t contrast;
+	struct control_t saturation;
+	struct control_t hue;
+	struct control_t gamma;
+	struct control_t sharpness;
+	struct control_t backlight_compensation;
+	struct control_t white_balance;
+	struct control_t gain;
+	struct control_t color_effect;
+	struct control_t flip_vertical;
+	struct control_t flip_horizontal;
+};
+
 struct device_t {
 	char			*path;
 	unsigned		input;
@@ -69,25 +107,34 @@ struct device_t {
 	unsigned		height;
 	unsigned		format;
 	v4l2_std_id		standard;
+	enum v4l2_memory	io_method;
 	bool			dv_timings;
 	unsigned		n_buffers;
 	unsigned		n_workers;
 	unsigned		desired_fps;
-	unsigned		min_frame_size;
+	size_t			min_frame_size;
 	bool			persistent;
 	unsigned		timeout;
 	unsigned		error_delay;
 
+	struct controls_t ctl;
+
 	struct device_runtime_t *run;
-	sig_atomic_t volatile stop;
 };
 
 
-struct device_t *device_init();
+struct device_t *device_init(void);
 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_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(struct device_t *dev);
 void device_close(struct device_t *dev);
+
+int device_switch_capturing(struct device_t *dev, bool enable);
+int device_select(struct device_t *dev, bool *has_read, bool *has_write, bool *has_error);
+int device_grab_buffer(struct device_t *dev);
+int device_release_buffer(struct device_t *dev, unsigned index);
+int device_consume_event(struct device_t *dev);

src/encoder.c

@@ -1,4 +1,5 @@
 /*****************************************************************************
+#                                                                            #
 #    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
 #                                                                            #
 #    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
@@ -19,18 +20,24 @@
 *****************************************************************************/
 
 
+#include "encoder.h"
+
+#include <stdlib.h>
+#include <stdbool.h>
 #include <strings.h>
 #include <assert.h>
 
+#include <linux/videodev2.h>
+
 #include "tools.h"
+#include "threading.h"
 #include "logging.h"
 #include "device.h"
-#include "encoder.h"
 
-#include "jpeg/encoder.h"
-
-#ifdef OMX_ENCODER
-#	include "omx/encoder.h"
+#include "encoders/cpu/encoder.h"
+#include "encoders/hw/encoder.h"
+#ifdef WITH_OMX
+#	include "encoders/omx/encoder.h"
 #endif
 
 
@@ -39,80 +46,47 @@ static const struct {
 	const enum encoder_type_t type;
 } _ENCODER_TYPES[] = {
 	{"CPU",	ENCODER_TYPE_CPU},
-#	ifdef OMX_ENCODER
+	{"HW",	ENCODER_TYPE_HW},
+#	ifdef WITH_OMX
 	{"OMX",	ENCODER_TYPE_OMX},
 #	endif
 };
 
 
-struct encoder_t *encoder_init() {
+struct encoder_t *encoder_init(void) {
+	struct encoder_runtime_t *run;
 	struct encoder_t *encoder;
 
+	A_CALLOC(run, 1);
+	run->type = ENCODER_TYPE_CPU;
+	run->quality = 80;
+	A_MUTEX_INIT(&run->mutex);
+
 	A_CALLOC(encoder, 1);
-	encoder->type = ENCODER_TYPE_CPU;
-	encoder->quality = 80;
+	encoder->type = run->type;
+	encoder->quality = run->quality;
+	encoder->run = run;
 	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]);
+#	ifdef WITH_OMX
+	if (encoder->run->omxs) {
+		for (unsigned index = 0; index < encoder->run->n_omxs; ++index) {
+			if (encoder->run->omxs[index]) {
+				omx_encoder_destroy(encoder->run->omxs[index]);
 			}
 		}
-		free(encoder->omxs);
+		free(encoder->run->omxs);
 	}
 #	endif
+	A_MUTEX_DESTROY(&encoder->run->mutex);
+	free(encoder->run);
 	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) {
+enum encoder_type_t 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;
 		}
@@ -120,58 +94,148 @@ enum encoder_type_t encoder_parse_type(const char *const str) {
 	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);
+const char *encoder_type_to_string(enum encoder_type_t 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;
+}
 
-#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) < 0) {
-				goto use_fallback;
+void encoder_prepare(struct encoder_t *encoder, struct device_t *dev) {
+	enum encoder_type_t type = (encoder->run->cpu_forced ? ENCODER_TYPE_CPU : encoder->type);
+	unsigned quality = encoder->quality;
+	bool cpu_forced = false;
+
+	if ((dev->run->format == V4L2_PIX_FMT_MJPEG || dev->run->format == V4L2_PIX_FMT_JPEG) && type != ENCODER_TYPE_HW) {
+		LOG_INFO("Switching to HW encoder because the input format is (M)JPEG");
+		type = ENCODER_TYPE_HW;
+	}
+
+	if (type == ENCODER_TYPE_HW) {
+		if (dev->run->format != V4L2_PIX_FMT_MJPEG && dev->run->format != V4L2_PIX_FMT_JPEG) {
+			LOG_INFO("Switching to CPU encoder because the input format is not (M)JPEG");
+			goto use_cpu;
+		}
+
+		if (hw_encoder_prepare(dev, quality) < 0) {
+			quality = 0;
+		}
+
+		dev->run->n_workers = 1;
+	}
+#	ifdef WITH_OMX
+	else if (type == ENCODER_TYPE_OMX) {
+		for (unsigned index = 0; index < encoder->n_glitched_resolutions; ++index) {
+			if (
+				encoder->glitched_resolutions[index][0] == dev->run->width
+				&& encoder->glitched_resolutions[index][1] == dev->run->height
+			) {
+				LOG_INFO("Switching to CPU encoder the resolution %ux%u marked as glitchy for OMX",
+					dev->run->width, dev->run->height);
+				goto use_cpu;
+			}
+		}
+
+		LOG_DEBUG("Preparing OMX encoder ...");
+
+		if (dev->run->n_workers > OMX_MAX_ENCODERS) {
+			LOG_INFO("OMX encoder sets limit for worker threads: %u", OMX_MAX_ENCODERS);
+			dev->run->n_workers = OMX_MAX_ENCODERS;
+		}
+
+		if (encoder->run->omxs == NULL) {
+			A_CALLOC(encoder->run->omxs, OMX_MAX_ENCODERS);
+		}
+
+		// Начинаем с нуля и доинициализируем на следующих заходах при необходимости
+		for (; encoder->run->n_omxs < dev->run->n_workers; ++encoder->run->n_omxs) {
+			if ((encoder->run->omxs[encoder->run->n_omxs] = omx_encoder_init()) == NULL) {
+				LOG_ERROR("Can't initialize OMX encoder, falling back to CPU");
+				goto force_cpu;
+			}
+		}
+
+		for (unsigned index = 0; index < encoder->run->n_omxs; ++index) {
+			if (omx_encoder_prepare(encoder->run->omxs[index], dev, quality) < 0) {
+				LOG_ERROR("Can't prepare OMX encoder, falling back to CPU");
+				goto force_cpu;
 			}
 		}
 	}
 #	endif
 
-	return;
+	goto ok;
 
 #	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;
+	// cppcheck-suppress unusedLabel
+	force_cpu:
+		cpu_forced = true;
 #	pragma GCC diagnostic pop
+
+	use_cpu:
+		type = ENCODER_TYPE_CPU;
+		quality = encoder->quality;
+
+	ok:
+		if (quality == 0) {
+			LOG_INFO("Using JPEG quality: encoder default");
+		} else {
+			LOG_INFO("Using JPEG quality: %u%%", quality);
+		}
+
+		A_MUTEX_LOCK(&encoder->run->mutex);
+		encoder->run->type = type;
+		encoder->run->quality = quality;
+		if (cpu_forced) {
+			encoder->run->cpu_forced = true;
+		}
+		A_MUTEX_UNLOCK(&encoder->run->mutex);
 }
 
-#pragma GCC diagnostic ignored "-Wunused-label"
+#pragma GCC diagnostic ignored "-Wunused-parameter"
 #pragma GCC diagnostic push
-int encoder_compress_buffer(struct encoder_t *encoder, struct device_t *dev,
-	const unsigned worker_number, const unsigned buf_index) {
+int encoder_compress_buffer(struct encoder_t *encoder, struct device_t *dev, unsigned worker_number, unsigned buf_index) {
 #pragma GCC diagnostic pop
 
-	assert(encoder->type != ENCODER_TYPE_UNKNOWN);
+	assert(encoder->run->type != ENCODER_TYPE_UNKNOWN);
+	assert(dev->run->hw_buffers[buf_index].used > 0);
 
-	if (encoder->type == ENCODER_TYPE_CPU) {
-		jpeg_encoder_compress_buffer(dev, buf_index, encoder->quality);
+	dev->run->pictures[buf_index]->encode_begin_ts = get_now_monotonic();
+
+	if (encoder->run->type == ENCODER_TYPE_CPU) {
+		LOG_VERBOSE("Compressing buffer %u using CPU", buf_index);
+		cpu_encoder_compress_buffer(dev, buf_index, encoder->run->quality);
+	} else if (encoder->run->type == ENCODER_TYPE_HW) {
+		LOG_VERBOSE("Compressing buffer %u using HW (just copying)", buf_index);
+		hw_encoder_compress_buffer(dev, buf_index);
 	}
-#	ifdef OMX_ENCODER
-	else if (encoder->type == ENCODER_TYPE_OMX) {
-		if (omx_encoder_compress_buffer(encoder->omxs[worker_number], dev, buf_index) < 0) {
+#	ifdef WITH_OMX
+	else if (encoder->run->type == ENCODER_TYPE_OMX) {
+		LOG_VERBOSE("Compressing buffer %u using OMX", buf_index);
+		if (omx_encoder_compress_buffer(encoder->run->omxs[worker_number], dev, buf_index) < 0) {
 			goto error;
 		}
 	}
 #	endif
 
+	dev->run->pictures[buf_index]->encode_end_ts = get_now_monotonic();
+
+	dev->run->pictures[buf_index]->width = dev->run->width;
+	dev->run->pictures[buf_index]->height = dev->run->height;
+
 	return 0;
 
 #	pragma GCC diagnostic ignored "-Wunused-label"
 #	pragma GCC diagnostic push
+	// cppcheck-suppress unusedLabel
 	error:
-		LOG_INFO("HW compressing error, falling back to CPU");
-		encoder->type = ENCODER_TYPE_CPU;
+		LOG_INFO("Error while compressing buffer, falling back to CPU");
+		A_MUTEX_LOCK(&encoder->run->mutex);
+		encoder->run->cpu_forced = true;
+		A_MUTEX_UNLOCK(&encoder->run->mutex);
 		return -1;
 #	pragma GCC diagnostic pop
 }

src/encoder.h

@@ -1,4 +1,5 @@
 /*****************************************************************************
+#                                                                            #
 #    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
 #                                                                            #
 #    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
@@ -21,46 +22,68 @@
 
 #pragma once
 
-#include "tools.h"
+#include <stdbool.h>
+
+#include <pthread.h>
+
 #include "device.h"
 
-#ifdef OMX_ENCODER
-#	include "omx/encoder.h"
+#ifdef WITH_OMX
+#	include "encoders/omx/encoder.h"
+
 #	define ENCODER_TYPES_OMX_HINT ", OMX"
+
+#	ifndef CFG_MAX_GLITCHED_RESOLUTIONS
+#		define CFG_MAX_GLITCHED_RESOLUTIONS 1024
+#	endif
+#	define MAX_GLITCHED_RESOLUTIONS ((unsigned)(CFG_MAX_GLITCHED_RESOLUTIONS))
 #else
 #	define ENCODER_TYPES_OMX_HINT ""
 #endif
 
 
 #define ENCODER_TYPES_STR \
-	"CPU" \
+	"CPU, HW" \
 	ENCODER_TYPES_OMX_HINT
 
 enum encoder_type_t {
 	ENCODER_TYPE_UNKNOWN, // Only for encoder_parse_type() and main()
 	ENCODER_TYPE_CPU,
-#ifdef OMX_ENCODER
+	ENCODER_TYPE_HW,
+#	ifdef WITH_OMX
 	ENCODER_TYPE_OMX,
-#endif
+#	endif
+};
+
+struct encoder_runtime_t {
+	enum encoder_type_t	type;
+	unsigned			quality;
+	bool				cpu_forced;
+	pthread_mutex_t		mutex;
+
+#	ifdef WITH_OMX
+	unsigned				n_omxs;
+	struct omx_encoder_t	**omxs;
+#	endif
 };
 
 struct encoder_t {
-	enum encoder_type_t		type;
-	unsigned				quality;
-#ifdef OMX_ENCODER
-	unsigned				n_omxs;
-	struct omx_encoder_t	**omxs;
-#endif
+	enum encoder_type_t	type;
+	unsigned			quality;
+#	ifdef WITH_OMX
+	unsigned	n_glitched_resolutions;
+	unsigned	glitched_resolutions[2][MAX_GLITCHED_RESOLUTIONS];
+#	endif
+
+	struct encoder_runtime_t *run;
 };
 
 
-struct encoder_t *encoder_init();
+struct encoder_t *encoder_init(void);
 void encoder_destroy(struct encoder_t *encoder);
 
-enum encoder_type_t encoder_parse_type(const char *const str);
+enum encoder_type_t encoder_parse_type(const char *str);
+const char *encoder_type_to_string(enum encoder_type_t type);
 
 void encoder_prepare(struct encoder_t *encoder, struct device_t *dev);
-void encoder_prepare_live(struct encoder_t *encoder, struct device_t *dev);
-
-int encoder_compress_buffer(struct encoder_t *encoder, struct device_t *dev,
-	const unsigned worker_number, const unsigned buf_index);
+int encoder_compress_buffer(struct encoder_t *encoder, struct device_t *dev, unsigned worker_number, unsigned buf_index);

src/encoders/cpu/encoder.c

@@ -1,4 +1,5 @@
 /*****************************************************************************
+#                                                                            #
 #    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
 #                                                                            #
 #    This source file based on code of MJPG-Streamer.                        #
@@ -24,61 +25,61 @@
 *****************************************************************************/
 
 
+#include "encoder.h"
+
 #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"
+#include "../../tools.h"
+#include "../../picture.h"
+#include "../../device.h"
 
 
-struct _mjpg_destination_mgr {
-	struct			jpeg_destination_mgr mgr; // Default manager
-	JOCTET			*buffer; // Start of buffer
-	unsigned char	*outbuffer_cursor;
-	unsigned long	*written;
+struct _jpeg_dest_manager_t {
+	struct				jpeg_destination_mgr mgr; // Default manager
+	JOCTET				*buffer; // Start of buffer
+	struct picture_t	*picture;
 };
 
 
-static void _jpeg_set_dest_picture(j_compress_ptr jpeg, unsigned char *picture, unsigned long *written);
+static void _jpeg_set_picture(j_compress_ptr jpeg, struct picture_t *picture);
 
-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_yuyv(
+	struct jpeg_compress_struct *jpeg, const unsigned char *data,
+	unsigned width, 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_uyvy(
+	struct jpeg_compress_struct *jpeg, const unsigned char *data,
+	unsigned width, 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_write_scanlines_rgb565(
+	struct jpeg_compress_struct *jpeg, const unsigned char *data,
+	unsigned width, unsigned height);
+
+static void _jpeg_write_scanlines_rgb24(
+	struct jpeg_compress_struct *jpeg, const unsigned char *data,
+	unsigned width, 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) {
+void cpu_encoder_compress_buffer(struct device_t *dev, unsigned index, 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_set_picture(&jpeg, dev->run->pictures[index]);
 
 	jpeg.image_width = dev->run->width;
 	jpeg.image_height = dev->run->height;
@@ -90,50 +91,59 @@ void jpeg_encoder_compress_buffer(struct device_t *dev, const unsigned index, co
 
 	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)
+#	define WRITE_SCANLINES(_format, _func) \
+		case _format: { _func(&jpeg, dev->run->hw_buffers[index].data, dev->run->width, dev->run->height); break; }
+
 	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");
+		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
 
-	// 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);
+
+	assert(dev->run->pictures[index]->used > 0);
 }
 
-static void _jpeg_set_dest_picture(j_compress_ptr jpeg, unsigned char *picture, unsigned long *written) {
-	struct _mjpg_destination_mgr *dest;
+static void _jpeg_set_picture(j_compress_ptr jpeg, struct picture_t *picture) {
+	struct _jpeg_dest_manager_t *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)
+			(j_common_ptr) jpeg, JPOOL_PERMANENT, sizeof(struct _jpeg_dest_manager_t)
 		)));
 	}
 
-	dest = (struct _mjpg_destination_mgr *) jpeg->dest;
+	dest = (struct _jpeg_dest_manager_t *)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;
+	dest->picture = picture;
+
+	picture->used = 0;
 }
 
-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) {
+#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 unsigned char *data,
+	unsigned width, unsigned height) {
+
+	unsigned char *line_buffer;
 	JSAMPROW scanlines[1];
 	unsigned z = 0;
 
+	A_CALLOC(line_buffer, width * 3);
+
 	while (jpeg->next_scanline < height) {
 		unsigned char *ptr = line_buffer;
 
@@ -142,13 +152,13 @@ static void _jpeg_write_scanlines_yuyv(struct jpeg_compress_struct *jpeg,
 			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;
+			int r = YUV_R(y, u, v);
+			int g = YUV_G(y, u, v);
+			int b = YUV_B(y, u, v);
 
-			*(ptr++) = (r > 255) ? 255 : ((r < 0) ? 0 : r);
-			*(ptr++) = (g > 255) ? 255 : ((g < 0) ? 0 : g);
-			*(ptr++) = (b > 255) ? 255 : ((b < 0) ? 0 : b);
+			*(ptr++) = NORM_COMPONENT(r);
+			*(ptr++) = NORM_COMPONENT(g);
+			*(ptr++) = NORM_COMPONENT(b);
 
 			if (z++) {
 				z = 0;
@@ -159,16 +169,21 @@ static void _jpeg_write_scanlines_yuyv(struct jpeg_compress_struct *jpeg,
 		scanlines[0] = line_buffer;
 		jpeg_write_scanlines(jpeg, scanlines, 1);
 	}
+
+	free(line_buffer);
 }
 
-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_uyvy(
+	struct jpeg_compress_struct *jpeg, const unsigned char *data,
+	unsigned width, unsigned height) {
 
+	unsigned char *line_buffer;
 	JSAMPROW scanlines[1];
 	unsigned z = 0;
 
-	while(jpeg->next_scanline < height) {
+	A_CALLOC(line_buffer, width * 3);
+
+	while (jpeg->next_scanline < height) {
 		unsigned char *ptr = line_buffer;
 
 		for(unsigned x = 0; x < width; ++x) {
@@ -176,13 +191,13 @@ static void _jpeg_write_scanlines_uyvy(struct jpeg_compress_struct *jpeg,
 			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;
+			int r = YUV_R(y, u, v);
+			int g = YUV_G(y, u, v);
+			int b = YUV_B(y, u, v);
 
-			*(ptr++) = (r > 255) ? 255 : ((r < 0) ? 0 : r);
-			*(ptr++) = (g > 255) ? 255 : ((g < 0) ? 0 : g);
-			*(ptr++) = (b > 255) ? 255 : ((b < 0) ? 0 : b);
+			*(ptr++) = NORM_COMPONENT(r);
+			*(ptr++) = NORM_COMPONENT(g);
+			*(ptr++) = NORM_COMPONENT(b);
 
 			if (z++) {
 				z = 0;
@@ -193,23 +208,33 @@ static void _jpeg_write_scanlines_uyvy(struct jpeg_compress_struct *jpeg,
 		scanlines[0] = line_buffer;
 		jpeg_write_scanlines(jpeg, scanlines, 1);
 	}
+
+	free(line_buffer);
 }
 
-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) {
+#undef NORM_COMPONENT
+#undef YUV_B
+#undef YUV_G
+#undef YUV_R
 
+static void _jpeg_write_scanlines_rgb565(
+	struct jpeg_compress_struct *jpeg, const unsigned char *data,
+	unsigned width, unsigned height) {
+
+	unsigned char *line_buffer;
 	JSAMPROW scanlines[1];
 
-	while(jpeg->next_scanline < height) {
+	A_CALLOC(line_buffer, width * 3);
+
+	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;
+			*(ptr++) = data[1] & 248; // Red
+			*(ptr++) = (unsigned char)((two_byte & 2016) >> 3); // Green
+			*(ptr++) = (data[0] & 31) * 8; // Blue
 
 			data += 2;
 		}
@@ -217,12 +242,26 @@ static void _jpeg_write_scanlines_rgb565(struct jpeg_compress_struct *jpeg,
 		scanlines[0] = line_buffer;
 		jpeg_write_scanlines(jpeg, scanlines, 1);
 	}
+
+	free(line_buffer);
 }
 
-#define JPEG_OUTPUT_BUFFER_SIZE  4096
+static void _jpeg_write_scanlines_rgb24(
+	struct jpeg_compress_struct *jpeg, const unsigned char *data,
+	unsigned width, unsigned height) {
+
+	JSAMPROW scanlines[1];
+
+	while (jpeg->next_scanline < height) {
+		scanlines[0] = (unsigned char *)(data + jpeg->next_scanline * width * 3);
+		jpeg_write_scanlines(jpeg, scanlines, 1);
+	}
+}
+
+#define JPEG_OUTPUT_BUFFER_SIZE ((size_t)4096)
 
 static void _jpeg_init_destination(j_compress_ptr jpeg) {
-	struct _mjpg_destination_mgr *dest = (struct _mjpg_destination_mgr *) jpeg->dest;
+	struct _jpeg_dest_manager_t *dest = (struct _jpeg_dest_manager_t *)jpeg->dest;
 
 	// Allocate the output buffer - it will be released when done with image
 	assert((dest->buffer = (JOCTET *)(*jpeg->mem->alloc_small)(
@@ -236,11 +275,9 @@ static void _jpeg_init_destination(j_compress_ptr jpeg) {
 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;
+	struct _jpeg_dest_manager_t *dest = (struct _jpeg_dest_manager_t *)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;
+	picture_append_data(dest->picture, dest->buffer, JPEG_OUTPUT_BUFFER_SIZE);
 
 	dest->mgr.next_output_byte = dest->buffer;
 	dest->mgr.free_in_buffer = JPEG_OUTPUT_BUFFER_SIZE;
@@ -250,15 +287,13 @@ static boolean _jpeg_empty_output_buffer(j_compress_ptr jpeg) {
 
 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
+	// 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;
+	struct _jpeg_dest_manager_t *dest = (struct _jpeg_dest_manager_t *)jpeg->dest;
+	size_t final = 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;
+	// Write any data remaining in the buffer.
+	picture_append_data(dest->picture, dest->buffer, final);
 }
 
 #undef JPEG_OUTPUT_BUFFER_SIZE

src/encoders/cpu/encoder.h

@@ -0,0 +1,28 @@
+/*****************************************************************************
+#                                                                            #
+#    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 "../../device.h"
+
+
+void cpu_encoder_compress_buffer(struct device_t *dev, unsigned index, unsigned quality);

src/encoders/hw/encoder.c

@@ -0,0 +1,109 @@
+/*****************************************************************************
+#                                                                            #
+#    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 "encoder.h"
+
+#include <stdbool.h>
+#include <string.h>
+#include <assert.h>
+
+#include <linux/videodev2.h>
+
+#include "../../tools.h"
+#include "../../logging.h"
+#include "../../xioctl.h"
+#include "../../picture.h"
+#include "../../device.h"
+
+#include "huffman.h"
+
+
+void _copy_plus_huffman(const struct hw_buffer_t *src, struct picture_t *dest);
+static bool _is_huffman(const unsigned char *data);
+
+
+int hw_encoder_prepare(struct device_t *dev, unsigned quality) {
+	struct v4l2_jpegcompression comp;
+
+	MEMSET_ZERO(comp);
+
+	if (xioctl(dev->run->fd, VIDIOC_G_JPEGCOMP, &comp) < 0) {
+		LOG_ERROR("Device does not support setting of HW encoding quality parameters");
+		return -1;
+	}
+	comp.quality = quality;
+	if (xioctl(dev->run->fd, VIDIOC_S_JPEGCOMP, &comp) < 0) {
+		LOG_ERROR("Unable to change MJPG quality for JPEG source with HW pass-through encoder");
+		return -1;
+	}
+	return 0;
+}
+
+void hw_encoder_compress_buffer(struct device_t *dev, unsigned index) {
+	if (dev->run->format != V4L2_PIX_FMT_MJPEG && dev->run->format != V4L2_PIX_FMT_JPEG) {
+		assert(0 && "Unsupported input format for HW encoder");
+	}
+	_copy_plus_huffman(&dev->run->hw_buffers[index], dev->run->pictures[index]);
+}
+
+void _copy_plus_huffman(const struct hw_buffer_t *src, struct picture_t *dest) {
+	if (!_is_huffman(src->data)) {
+		const unsigned char *src_ptr = src->data;
+		const unsigned char *src_end = src->data + src->used;
+		size_t paste;
+
+		while ((((src_ptr[0] << 8) | src_ptr[1]) != 0xFFC0) && (src_ptr < src_end)) {
+			src_ptr += 1;
+		}
+		if (src_ptr >= src_end) {
+			dest->used = 0; // Error
+			return;
+		}
+		paste = src_ptr - src->data;
+
+		picture_set_data(dest, src->data, paste);
+		picture_append_data(dest, HUFFMAN_TABLE, sizeof(HUFFMAN_TABLE));
+		picture_append_data(dest, src_ptr, src->used - paste);
+	} else {
+		picture_set_data(dest, src->data, src->used);
+	}
+}
+
+static bool _is_huffman(const unsigned char *data) {
+	unsigned count = 0;
+
+	while (((data[0] << 8) | data[1]) != 0xFFDA) {
+		if (count++ > 2048) {
+			return false;
+		}
+		if (((data[0] << 8) | data[1]) == 0xFFC4) {
+			return true;
+		}
+		data += 1;
+	}
+	return false;
+}

src/encoders/hw/encoder.h

@@ -0,0 +1,29 @@
+/*****************************************************************************
+#                                                                            #
+#    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 "../../device.h"
+
+
+int hw_encoder_prepare(struct device_t *dev, unsigned quality);
+void hw_encoder_compress_buffer(struct device_t *dev, unsigned index);

src/encoders/hw/huffman.h

@@ -0,0 +1,66 @@
+/*****************************************************************************
+#                                                                            #
+#    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/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#pragma once
+
+static const unsigned char HUFFMAN_TABLE[] = {
+	0xFF, 0xC4, 0x01, 0xA2, 0x00, 0x00, 0x01, 0x05, 0x01, 0x01, 0x01, 0x01,
+	0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02,
+	0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x01, 0x00, 0x03,
+	0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
+	0x0A, 0x0B, 0x10, 0x00, 0x02, 0x01, 0x03, 0x03, 0x02, 0x04, 0x03, 0x05,
+	0x05, 0x04, 0x04, 0x00, 0x00, 0x01, 0x7D, 0x01, 0x02, 0x03, 0x00, 0x04,
+	0x11, 0x05, 0x12, 0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07, 0x22,
+	0x71, 0x14, 0x32, 0x81, 0x91, 0xA1, 0x08, 0x23, 0x42, 0xB1, 0xC1, 0x15,
+	0x52, 0xD1, 0xF0, 0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0A, 0x16, 0x17,
+	0x18, 0x19, 0x1A, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x34, 0x35, 0x36,
+	0x37, 0x38, 0x39, 0x3A, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A,
+	0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66,
+	0x67, 0x68, 0x69, 0x6A, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A,
+	0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94, 0x95,
+	0x96, 0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8,
+	0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xC2,
+	0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xD2, 0xD3, 0xD4, 0xD5,
+	0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
+	0xE8, 0xE9, 0xEA, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9,
+	0xFA, 0x11, 0x00, 0x02, 0x01, 0x02, 0x04, 0x04, 0x03, 0x04, 0x07, 0x05,
+	0x04, 0x04, 0x00, 0x01, 0x02, 0x77, 0x00, 0x01, 0x02, 0x03, 0x11, 0x04,
+	0x05, 0x21, 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71, 0x13, 0x22,
+	0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 0xA1, 0xB1, 0xC1, 0x09, 0x23, 0x33,
+	0x52, 0xF0, 0x15, 0x62, 0x72, 0xD1, 0x0A, 0x16, 0x24, 0x34, 0xE1, 0x25,
+	0xF1, 0x17, 0x18, 0x19, 0x1A, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x35, 0x36,
+	0x37, 0x38, 0x39, 0x3A, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A,
+	0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66,
+	0x67, 0x68, 0x69, 0x6A, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A,
+	0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94,
+	0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7,
+	0xA8, 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA,
+	0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xD2, 0xD3, 0xD4,
+	0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
+	0xE8, 0xE9, 0xEA, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA,
+};

src/encoders/omx/component.c

@@ -1,4 +1,5 @@
 /*****************************************************************************
+#                                                                            #
 #    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
 #                                                                            #
 #    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
@@ -19,52 +20,54 @@
 *****************************************************************************/
 
 
+#include "component.h"
+
 #include <unistd.h>
 
 #include <IL/OMX_Core.h>
 #include <IL/OMX_Component.h>
 
-#include "../logging.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);
+static int _component_wait_port_changed(OMX_HANDLETYPE *component, OMX_U32 port, OMX_BOOL enabled);
+static int _component_wait_state_changed(OMX_HANDLETYPE *component, OMX_STATETYPE wanted);
 
 
-int component_enable_port(OMX_HANDLETYPE *component, const OMX_U32 port) {
+int component_enable_port(OMX_HANDLETYPE *component, 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);
+		LOG_ERROR_OMX(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) {
+int component_disable_port(OMX_HANDLETYPE *component, 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);
+		LOG_ERROR_OMX(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) {
+int component_get_portdef(OMX_HANDLETYPE *component, OMX_PARAM_PORTDEFINITIONTYPE *portdef, OMX_U32 port) {
 	OMX_ERRORTYPE error;
 
+	// cppcheck-suppress redundantPointerOp
 	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);
+		LOG_ERROR_OMX(error, "Can't get OMX port %u definition", port);
 		return -1;
 	}
 	return 0;
@@ -75,14 +78,14 @@ int component_set_portdef(OMX_HANDLETYPE *component, OMX_PARAM_PORTDEFINITIONTYP
 
 	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);
+		LOG_ERROR_OMX(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);
+int component_set_state(OMX_HANDLETYPE *component, OMX_STATETYPE state) {
+	const char *state_str = omx_state_to_string(state);
 	OMX_ERRORTYPE error;
 	int retries = 50;
 
@@ -94,7 +97,7 @@ int component_set_state(OMX_HANDLETYPE *component, const OMX_STATETYPE state) {
 			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);
+			LOG_ERROR_OMX(error, "Can't switch OMX component state to %s, need to retry", state_str);
 			retries -= 1;
 			usleep(8000);
 		} else {
@@ -102,12 +105,12 @@ int component_set_state(OMX_HANDLETYPE *component, const OMX_STATETYPE state) {
 		}
 	} while (retries);
 
-	LOG_OMX_ERROR(error, "Can't switch OMX component state to %s", state_str);
+	LOG_ERROR_OMX(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) {
+static int _component_wait_port_changed(OMX_HANDLETYPE *component, OMX_U32 port, OMX_BOOL enabled) {
 	OMX_ERRORTYPE error;
 	OMX_PARAM_PORTDEFINITIONTYPE portdef;
 	int retries = 50;
@@ -117,7 +120,7 @@ static int _component_wait_port_changed(OMX_HANDLETYPE *component, const OMX_U32
 
 	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);
+			LOG_ERROR_OMX(error, "Can't get OMX port %u definition for waiting", port);
 			return -1;
 		}
 
@@ -132,14 +135,14 @@ static int _component_wait_port_changed(OMX_HANDLETYPE *component, const OMX_U32
 	return (portdef.bEnabled == enabled ? 0 : -1);
 }
 
-static int _component_wait_state_changed(OMX_HANDLETYPE *component, const OMX_STATETYPE wanted) {
+static int _component_wait_state_changed(OMX_HANDLETYPE *component, 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");
+			LOG_ERROR_OMX(error, "Failed to get OMX component state");
 			return -1;
 		}
 

src/encoders/omx/component.h

@@ -1,4 +1,5 @@
 /*****************************************************************************
+#                                                                            #
 #    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
 #                                                                            #
 #    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
@@ -38,10 +39,10 @@
 	}
 
 
-int component_enable_port(OMX_HANDLETYPE *component, const OMX_U32 port);
-int component_disable_port(OMX_HANDLETYPE *component, const OMX_U32 port);
+int component_enable_port(OMX_HANDLETYPE *component, OMX_U32 port);
+int component_disable_port(OMX_HANDLETYPE *component, OMX_U32 port);
 
-int component_get_portdef(OMX_HANDLETYPE *component, OMX_PARAM_PORTDEFINITIONTYPE *portdef, const OMX_U32 port);
+int component_get_portdef(OMX_HANDLETYPE *component, OMX_PARAM_PORTDEFINITIONTYPE *portdef, OMX_U32 port);
 int component_set_portdef(OMX_HANDLETYPE *component, OMX_PARAM_PORTDEFINITIONTYPE *portdef);
 
-int component_set_state(OMX_HANDLETYPE *component, const OMX_STATETYPE state);
+int component_set_state(OMX_HANDLETYPE *component, OMX_STATETYPE state);

src/encoders/omx/encoder.c

@@ -1,4 +1,5 @@
 /*****************************************************************************
+#                                                                            #
 #    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
 #                                                                            #
 #    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
@@ -19,7 +20,10 @@
 *****************************************************************************/
 
 
+#include "encoder.h"
+
 #include <stdlib.h>
+#include <stdbool.h>
 #include <string.h>
 #include <unistd.h>
 #include <assert.h>
@@ -32,40 +36,44 @@
 #include <IL/OMX_Broadcom.h>
 #include <interface/vcos/vcos_semaphore.h>
 
-#include "../logging.h"
-#include "../tools.h"
-#include "../device.h"
+#include "../../logging.h"
+#include "../../tools.h"
+#include "../../picture.h"
+#include "../../device.h"
 
 #include "formatters.h"
 #include "component.h"
-#include "encoder.h"
 
 
-#define INPUT_PORT 340
-#define OUTPUT_PORT 341
+static const OMX_U32 _INPUT_PORT = 340;
+static const OMX_U32 _OUTPUT_PORT = 341;
 
 
 static int _i_omx = 0;
 
 
+static int _vcos_semwait(VCOS_SEMAPHORE_T *sem);
 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);
+static int _omx_setup_output(struct omx_encoder_t *omx, unsigned quality);
 static int _omx_encoder_clear_ports(struct omx_encoder_t *omx);
 
-static OMX_ERRORTYPE _omx_event_handler(UNUSED OMX_HANDLETYPE encoder,
+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,
+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,
+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() {
+struct omx_encoder_t *omx_encoder_init(void) {
 	// Some theory:
 	//   - http://www.fourcc.org/yuv.php
 	//   - https://kwasi-ich.de/blog/2017/11/26/omx/
@@ -74,6 +82,7 @@ struct omx_encoder_t *omx_encoder_init() {
 	//   - 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
+	//   - http://home.nouwen.name/RaspberryPi/documentation/ilcomponents/image_encode.html
 
 	struct omx_encoder_t *omx;
 	OMX_ERRORTYPE error;
@@ -87,19 +96,19 @@ struct omx_encoder_t *omx_encoder_init() {
 
 		LOG_INFO("Initializing OMX ...");
 		if ((error = OMX_Init()) != OMX_ErrorNone) {
-			LOG_OMX_ERROR(error, "Can't initialize OMX");
+			LOG_ERROR_OMX(error, "Can't initialize OMX");
 			goto error;
 		}
 	}
 	_i_omx += 1;
 
-	LOG_INFO("Initializing OMX JPEG encoder ...");
+	LOG_INFO("Initializing OMX encoder ...");
 
-	if (vcos_semaphore_create(&omx->handler_lock, "handler_lock", 0) != VCOS_SUCCESS) {
+	if (vcos_semaphore_create(&omx->handler_sem, "handler_sem", 0) != VCOS_SUCCESS) {
 		LOG_ERROR("Can't create VCOS semaphore");
 		goto error;
 	}
-	omx->i_handler_lock = true;
+	omx->i_handler_sem = true;
 
 	if (_omx_init_component(omx) < 0) {
 		goto error;
@@ -119,19 +128,19 @@ struct omx_encoder_t *omx_encoder_init() {
 void omx_encoder_destroy(struct omx_encoder_t *omx) {
 	OMX_ERRORTYPE error;
 
-	LOG_INFO("Destroying OMX JPEG encoder ...");
+	LOG_INFO("Destroying OMX 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_handler_sem) {
+		vcos_semaphore_delete(&omx->handler_sem);
 	}
 
 	if (omx->i_encoder) {
 		if ((error = OMX_FreeHandle(omx->encoder)) != OMX_ErrorNone) {
-			LOG_OMX_ERROR(error, "Can't free OMX.broadcom.image_encode");
+			LOG_ERROR_OMX(error, "Can't free OMX.broadcom.image_encode");
 		}
 	}
 
@@ -148,7 +157,7 @@ void omx_encoder_destroy(struct omx_encoder_t *omx) {
 	free(omx);
 }
 
-int omx_encoder_prepare_live(struct omx_encoder_t *omx, struct device_t *dev, const unsigned quality) {
+int omx_encoder_prepare(struct omx_encoder_t *omx, struct device_t *dev, unsigned quality) {
 	if (component_set_state(&omx->encoder, OMX_StateIdle) < 0) {
 		return -1;
 	}
@@ -167,16 +176,21 @@ int omx_encoder_prepare_live(struct omx_encoder_t *omx, struct device_t *dev, co
 	return 0;
 }
 
-int omx_encoder_compress_buffer(struct omx_encoder_t *omx, struct device_t *dev, const unsigned index) {
+int omx_encoder_compress_buffer(struct omx_encoder_t *omx, struct device_t *dev, unsigned index) {
+#	define HW_BUFFER(_next)	dev->run->hw_buffers[index]._next
+#	define IN(_next)		omx->input_buffer->_next
+#	define OUT(_next)		omx->output_buffer->_next
+
 	OMX_ERRORTYPE error;
-	bool loaded = false;
+	size_t slice_size = (IN(nAllocLen) < HW_BUFFER(used) ? IN(nAllocLen) : HW_BUFFER(used));
+	size_t pos = 0;
 
 	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");
+		LOG_ERROR_OMX(error, "Failed to request filling of the output buffer on encoder");
 		return -1;
 	}
 
-	dev->run->pictures[index].size = 0;
+	dev->run->pictures[index]->used = 0;
 	omx->output_available = false;
 	omx->input_required = true;
 
@@ -188,50 +202,88 @@ int omx_encoder_compress_buffer(struct omx_encoder_t *omx, struct device_t *dev,
 		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;
+			picture_append_data(dev->run->pictures[index], OUT(pBuffer) + OUT(nOffset), OUT(nFilledLen));
 
-			if (omx->output_buffer->nFlags & OMX_BUFFERFLAG_ENDOFFRAME) {
-				omx->output_buffer->nFlags = 0;
+			if (OUT(nFlags) & OMX_BUFFERFLAG_ENDOFFRAME) {
+				OUT(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");
+				LOG_ERROR_OMX(error, "Failed to request filling of the output buffer on encoder");
 				return -1;
 			}
 		}
 
 		if (omx->input_required) {
 			omx->input_required = false;
-			if (loaded) {
+
+			if (pos == HW_BUFFER(used)) {
 				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;
+			memcpy(IN(pBuffer), HW_BUFFER(data) + pos, slice_size);
+			IN(nOffset) = 0;
+			IN(nFilledLen) = slice_size;
+
+			pos += slice_size;
+
+			if (pos + slice_size > HW_BUFFER(used)) {
+				slice_size = HW_BUFFER(used) - pos;
+			}
 
 			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");
+				LOG_ERROR_OMX(error, "Failed to request emptying of the input buffer on encoder");
 				return -1;
 			}
 		}
 
-		vcos_semaphore_wait(&omx->handler_lock);
+		if (_vcos_semwait(&omx->handler_sem) != 0) {
+			return -1;
+		}
 	}
+
+#	undef OUT
+#	undef IN
+#	undef HW_BUFFER
 	return 0;
 }
 
-static int _omx_init_component(struct omx_encoder_t *omx) {
-	// http://home.nouwen.name/RaspberryPi/documentation/ilcomponents/image_encode.html
+static int _vcos_semwait(VCOS_SEMAPHORE_T *sem) {
+	// vcos_semaphore_wait() can wait infinite
+	// vcos_semaphore_wait_timeout() is broken by design:
+	//   - https://github.com/pikvm/ustreamer/issues/56
+	//   - https://github.com/raspberrypi/userland/issues/658
+	// CFG_OMX_SEMWAIT_TIMEOUT is ugly busyloop
+	// Три стула.
 
+#	ifdef CFG_OMX_SEMWAIT_TIMEOUT
+	long double deadline_ts = get_now_monotonic() + (long double)CFG_OMX_SEMWAIT_TIMEOUT; // Seconds
+	VCOS_STATUS_T sem_status;
+
+	while (true) {
+		sem_status = vcos_semaphore_trywait(sem);
+		if (sem_status == VCOS_SUCCESS) {
+			return 0;
+		} else if (sem_status != VCOS_EAGAIN || get_now_monotonic() > deadline_ts) {
+			goto error;
+		}
+		usleep(1000);
+	}
+
+	error:
+		switch (sem_status) {
+			case VCOS_EAGAIN: LOG_ERROR("Can't wait VCOS semaphore: EAGAIN (timeout)"); break;
+			case VCOS_EINVAL: LOG_ERROR("Can't wait VCOS semaphore: EINVAL"); break;
+			default: LOG_ERROR("Can't wait VCOS semaphore: %d", sem_status); break;
+		}
+		return -1;
+#	else
+	return (vcos_semaphore_wait(sem) == VCOS_SUCCESS ? 0 : -1);
+#	endif
+}
+
+static int _omx_init_component(struct omx_encoder_t *omx) {
 	OMX_ERRORTYPE error;
 
 	OMX_CALLBACKTYPE callbacks;
@@ -242,7 +294,7 @@ static int _omx_init_component(struct omx_encoder_t *omx) {
 
 	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");
+		LOG_ERROR_OMX(error, "Can't initialize OMX.broadcom.image_encode");
 		return -1;
 	}
 	omx->i_encoder = true;
@@ -259,13 +311,13 @@ static int _omx_init_disable_ports(struct omx_encoder_t *omx) {
 
 	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)");
+		LOG_ERROR_OMX(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);
+			LOG_ERROR_OMX(error, "Can't OMX_GetParameter(types[%u])", index);
 			return -1;
 		}
 		for (OMX_U32 port = ports.nStartPortNumber; port < ports.nStartPortNumber + ports.nPorts; ++port) {
@@ -283,7 +335,7 @@ static int _omx_setup_input(struct omx_encoder_t *omx, struct device_t *dev) {
 
 	LOG_DEBUG("Setting up OMX JPEG input port ...");
 
-	if (component_get_portdef(&omx->encoder, &portdef, INPUT_PORT) < 0) {
+	if (component_get_portdef(&omx->encoder, &portdef, _INPUT_PORT) < 0) {
 		LOG_ERROR("... first");
 		return -1;
 	}
@@ -291,51 +343,58 @@ static int _omx_setup_input(struct omx_encoder_t *omx, struct device_t *dev) {
 	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.nSliceHeight = align_size(dev->run->height, 16);
 	portdef.format.image.bFlagErrorConcealment = OMX_FALSE;
 	portdef.format.image.eCompressionFormat = OMX_IMAGE_CodingUnused;
-	portdef.nBufferSize = dev->run->max_picture_size;
+	portdef.nBufferSize = picture_get_generous_size(dev->run->width, dev->run->height);
+
+#	define MAP_FORMAT(_v4l2_format, _omx_format) \
+		case _v4l2_format: { portdef.format.image.eColorFormat = _omx_format; break; }
 
 	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");
+		MAP_FORMAT(V4L2_PIX_FMT_YUYV, OMX_COLOR_FormatYCbYCr);
+		MAP_FORMAT(V4L2_PIX_FMT_UYVY, OMX_COLOR_FormatCbYCrY);
+		MAP_FORMAT(V4L2_PIX_FMT_RGB565, OMX_COLOR_Format16bitRGB565);
+		MAP_FORMAT(V4L2_PIX_FMT_RGB24, OMX_COLOR_Format24bitRGB888);
+		// TODO: найти устройство с RGB565 и протестить его.
+		// FIXME: RGB24 не работает нормально, нижняя половина экрана зеленая.
+		// FIXME: Китайский EasyCap тоже не работает, мусор на экране.
+		// Вероятно обе проблемы вызваны некорректной реализацией OMX на пае.
+		default: assert(0 && "Unsupported input format for OMX encoder");
 	}
 
+#	undef MAP_FORMAT
+
 	if (component_set_portdef(&omx->encoder, &portdef) < 0) {
 		return -1;
 	}
 
-	if (component_get_portdef(&omx->encoder, &portdef, INPUT_PORT) < 0) {
+	if (component_get_portdef(&omx->encoder, &portdef, _INPUT_PORT) < 0) {
 		LOG_ERROR("... second");
 		return -1;
 	}
 
-	if (component_enable_port(&omx->encoder, INPUT_PORT) < 0) {
+	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");
+	if ((error = OMX_AllocateBuffer(omx->encoder, &omx->input_buffer, _INPUT_PORT, NULL, portdef.nBufferSize)) != OMX_ErrorNone) {
+		LOG_ERROR_OMX(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) {
+static int _omx_setup_output(struct omx_encoder_t *omx, unsigned quality) {
 	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) {
+	if (component_get_portdef(&omx->encoder, &portdef, _OUTPUT_PORT) < 0) {
 		LOG_ERROR("... first");
 		return -1;
 	}
@@ -348,7 +407,7 @@ static int _omx_setup_output(struct omx_encoder_t *omx, const unsigned quality)
 		return -1;
 	}
 
-	if (component_get_portdef(&omx->encoder, &portdef, OUTPUT_PORT) < 0) {
+	if (component_get_portdef(&omx->encoder, &portdef, _OUTPUT_PORT) < 0) {
 		LOG_ERROR("... second");
 		return -1;
 	}
@@ -360,7 +419,7 @@ static int _omx_setup_output(struct omx_encoder_t *omx, const unsigned quality)
 		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");
+			LOG_ERROR_OMX(error, "Can't disable EXIF on OMX JPEG");
 			return -1;
 		}
 	}
@@ -369,11 +428,11 @@ static int _omx_setup_output(struct omx_encoder_t *omx, const unsigned quality)
 		OMX_PARAM_IJGSCALINGTYPE ijg;
 
 		OMX_INIT_STRUCTURE(ijg);
-		ijg.nPortIndex = OUTPUT_PORT;
+		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");
+			LOG_ERROR_OMX(error, "Can't set OMX JPEG IJG settings");
 			return -1;
 		}
 	}
@@ -382,22 +441,22 @@ static int _omx_setup_output(struct omx_encoder_t *omx, const unsigned quality)
 		OMX_IMAGE_PARAM_QFACTORTYPE qfactor;
 
 		OMX_INIT_STRUCTURE(qfactor);
-		qfactor.nPortIndex = OUTPUT_PORT;
+		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");
+			LOG_ERROR_OMX(error, "Can't set OMX JPEG quality");
 			return -1;
 		}
 	}
 
-	if (component_enable_port(&omx->encoder, OUTPUT_PORT) < 0) {
+	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");
+	if ((error = OMX_AllocateBuffer(omx->encoder, &omx->output_buffer, _OUTPUT_PORT, NULL, portdef.nBufferSize)) != OMX_ErrorNone) {
+		LOG_ERROR_OMX(error, "Can't allocate OMX JPEG output buffer");
 		return -1;
 	}
 	return 0;
@@ -405,35 +464,36 @@ static int _omx_setup_output(struct omx_encoder_t *omx, const unsigned quality)
 
 static int _omx_encoder_clear_ports(struct omx_encoder_t *omx) {
 	OMX_ERRORTYPE error;
-	int retcode = 0;
+	int retval = 0;
 
 	if (omx->i_output_port_enabled) {
-		retcode -= component_disable_port(&omx->encoder, OUTPUT_PORT);
+		retval -= 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);
+		retval -= 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;
+		if ((error = OMX_FreeBuffer(omx->encoder, _INPUT_PORT, omx->input_buffer)) != OMX_ErrorNone) {
+			LOG_ERROR_OMX(error, "Can't free OMX JPEG input buffer");
+			// retval -= 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;
+		if ((error = OMX_FreeBuffer(omx->encoder, _OUTPUT_PORT, omx->output_buffer)) != OMX_ErrorNone) {
+			LOG_ERROR_OMX(error, "Can't free OMX JPEG output buffer");
+			// retval -= 1;
 		}
 		omx->output_buffer = NULL;
 	}
-	return retcode;
+	return retval;
 }
 
-static OMX_ERRORTYPE _omx_event_handler(UNUSED OMX_HANDLETYPE encoder,
+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) {
 
@@ -442,14 +502,15 @@ static OMX_ERRORTYPE _omx_event_handler(UNUSED OMX_HANDLETYPE encoder,
 	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");
+		LOG_ERROR_OMX((OMX_ERRORTYPE)data1, "OMX error event received");
 		omx->failed = true;
-		vcos_semaphore_post(&omx->handler_lock);
+		assert(vcos_semaphore_post(&omx->handler_sem) == VCOS_SUCCESS);
 	}
 	return OMX_ErrorNone;
 }
 
-static OMX_ERRORTYPE _omx_input_required_handler(UNUSED OMX_HANDLETYPE encoder,
+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
@@ -458,11 +519,12 @@ static OMX_ERRORTYPE _omx_input_required_handler(UNUSED OMX_HANDLETYPE encoder,
 	struct omx_encoder_t *omx = (struct omx_encoder_t *)v_omx;
 
 	omx->input_required = true;
-	vcos_semaphore_post(&omx->handler_lock);
+	assert(vcos_semaphore_post(&omx->handler_sem) == VCOS_SUCCESS);
 	return OMX_ErrorNone;
 }
 
-static OMX_ERRORTYPE _omx_output_available_handler(UNUSED OMX_HANDLETYPE encoder,
+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
@@ -471,6 +533,6 @@ static OMX_ERRORTYPE _omx_output_available_handler(UNUSED OMX_HANDLETYPE encoder
 	struct omx_encoder_t *omx = (struct omx_encoder_t *)v_omx;
 
 	omx->output_available = true;
-	vcos_semaphore_post(&omx->handler_lock);
+	assert(vcos_semaphore_post(&omx->handler_sem) == VCOS_SUCCESS);
 	return OMX_ErrorNone;
 }

src/encoders/omx/encoder.h

@@ -1,4 +1,5 @@
 /*****************************************************************************
+#                                                                            #
 #    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
 #                                                                            #
 #    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
@@ -26,10 +27,12 @@
 #include <IL/OMX_Component.h>
 #include <interface/vcos/vcos_semaphore.h>
 
-#include "../device.h"
+#include "../../device.h"
 
-
-#define OMX_MAX_ENCODERS 3
+#ifndef CFG_OMX_MAX_ENCODERS
+#	define CFG_OMX_MAX_ENCODERS 3 // Raspberry Pi limitation
+#endif
+#define OMX_MAX_ENCODERS ((unsigned)(CFG_OMX_MAX_ENCODERS))
 
 
 struct omx_encoder_t {
@@ -39,17 +42,17 @@ struct omx_encoder_t {
 	bool					input_required;
 	bool					output_available;
 	bool					failed;
-	VCOS_SEMAPHORE_T		handler_lock;
+	VCOS_SEMAPHORE_T		handler_sem;
 
-	bool	i_handler_lock;
+	bool	i_handler_sem;
 	bool	i_encoder;
 	bool	i_input_port_enabled;
 	bool	i_output_port_enabled;
 };
 
 
-struct omx_encoder_t *omx_encoder_init();
+struct omx_encoder_t *omx_encoder_init(void);
 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);
-int omx_encoder_compress_buffer(struct omx_encoder_t *omx, struct device_t *dev, const unsigned index);
+int omx_encoder_prepare(struct omx_encoder_t *omx, struct device_t *dev, unsigned quality);
+int omx_encoder_compress_buffer(struct omx_encoder_t *omx, struct device_t *dev, unsigned index);

src/encoders/omx/formatters.c

@@ -1,4 +1,5 @@
 /*****************************************************************************
+#                                                                            #
 #    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
 #                                                                            #
 #    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
@@ -19,26 +20,27 @@
 *****************************************************************************/
 
 
+#include "formatters.h"
+
 #include <stdio.h>
 #include <assert.h>
 
 #include <IL/OMX_IVCommon.h>
 #include <IL/OMX_Core.h>
 
-#include "../tools.h"
-#include "formatters.h"
+#include "../../tools.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); \
+		char *_assert_buf; A_CALLOC(_assert_buf, 128); \
+		sprintf(_assert_buf, _msg ": 0x%08x", _value); \
+		assert(0 && _assert_buf); \
 	}
 
-const char *omx_error_to_string(const OMX_ERRORTYPE error) {
+const char *omx_error_to_string(OMX_ERRORTYPE error) {
 	switch (error) {
 		CASE_TO_STRING(OMX_ErrorNone);
 		CASE_TO_STRING(OMX_ErrorInsufficientResources);
@@ -65,15 +67,40 @@ const char *omx_error_to_string(const OMX_ERRORTYPE error) {
 		CASE_TO_STRING(OMX_ErrorPortUnresponsiveDuringDeallocation);
 		CASE_TO_STRING(OMX_ErrorPortUnresponsiveDuringStop);
 		CASE_TO_STRING(OMX_ErrorIncorrectStateTransition);
+		CASE_TO_STRING(OMX_ErrorIncorrectStateOperation);
+		CASE_TO_STRING(OMX_ErrorUnsupportedSetting);
+		CASE_TO_STRING(OMX_ErrorUnsupportedIndex);
+		CASE_TO_STRING(OMX_ErrorBadPortIndex);
+		CASE_TO_STRING(OMX_ErrorPortUnpopulated);
+		CASE_TO_STRING(OMX_ErrorComponentSuspended);
+		CASE_TO_STRING(OMX_ErrorDynamicResourcesUnavailable);
+		CASE_TO_STRING(OMX_ErrorMbErrorsInFrame);
+		CASE_TO_STRING(OMX_ErrorFormatNotDetected);
+		CASE_TO_STRING(OMX_ErrorContentPipeOpenFailed);
+		CASE_TO_STRING(OMX_ErrorContentPipeCreationFailed);
+		CASE_TO_STRING(OMX_ErrorSeperateTablesUsed);
+		CASE_TO_STRING(OMX_ErrorTunnelingUnsupported);
+		CASE_TO_STRING(OMX_ErrorKhronosExtensions);
+		CASE_TO_STRING(OMX_ErrorVendorStartUnused);
+		CASE_TO_STRING(OMX_ErrorDiskFull);
+		CASE_TO_STRING(OMX_ErrorMaxFileSize);
+		CASE_TO_STRING(OMX_ErrorDrmUnauthorised);
+		CASE_TO_STRING(OMX_ErrorDrmExpired);
+		CASE_TO_STRING(OMX_ErrorDrmGeneral);
 		default: return "Unknown OMX error";
 	}
 }
 
-const char *omx_state_to_string(const OMX_STATETYPE state) {
+const char *omx_state_to_string(OMX_STATETYPE state) {
 	switch (state) {
+		CASE_TO_STRING(OMX_StateInvalid);
 		CASE_TO_STRING(OMX_StateLoaded);
 		CASE_TO_STRING(OMX_StateIdle);
 		CASE_TO_STRING(OMX_StateExecuting);
+		CASE_TO_STRING(OMX_StatePause);
+		CASE_TO_STRING(OMX_StateWaitForResources);
+		// cppcheck-suppress constArgument
+		// cppcheck-suppress knownArgument
 		CASE_ASSERT("Unsupported OMX state", state);
 	}
 }

src/encoders/omx/formatters.h

@@ -1,4 +1,5 @@
 /*****************************************************************************
+#                                                                            #
 #    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
 #                                                                            #
 #    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
@@ -21,25 +22,17 @@
 
 #pragma once
 
-#include <stdio.h>
-
-#include <sys/syscall.h>
-
 #include <IL/OMX_IVCommon.h>
 #include <IL/OMX_Core.h>
 #include <IL/OMX_Image.h>
 
-#include "../logging.h"
-#include "../tools.h"
+#include "../../logging.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; \
+#define LOG_ERROR_OMX(_error, _msg, ...) { \
+		LOG_ERROR(_msg ": %s", ##__VA_ARGS__, omx_error_to_string(_error)); \
 	}
 
 
-const char *omx_error_to_string(const OMX_ERRORTYPE error);
-const char *omx_state_to_string(const OMX_STATETYPE state);
+const char *omx_error_to_string(OMX_ERRORTYPE error);
+const char *omx_state_to_string(OMX_STATETYPE state);

src/gpio/gpio.c

@@ -0,0 +1,142 @@
+/*****************************************************************************
+#                                                                            #
+#    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 "gpio.h"
+
+#include <stdlib.h>
+#include <stdbool.h>
+#include <string.h>
+#include <assert.h>
+
+#include <pthread.h>
+#include <gpiod.h>
+
+#include "../tools.h"
+#include "../logging.h"
+#include "../threading.h"
+
+
+struct gpio_t gpio = {
+	.path = "/dev/gpiochip0",
+	.consumer_prefix = "ustreamer",
+
+#	define MAKE_OUTPUT(_role) { \
+		.pin = -1, \
+		.role = _role, \
+		.consumer = NULL, \
+		.line = NULL, \
+		.state = false \
+	}
+
+	.prog_running = MAKE_OUTPUT("prog-running"),
+	.stream_online = MAKE_OUTPUT("stream-online"),
+	.has_http_clients = MAKE_OUTPUT("has-http-clients"),
+
+#	undef MAKE_OUTPUT
+
+	// mutex uninitialized
+	.chip = NULL
+};
+
+
+static void _gpio_output_init(struct gpio_output_t *output);
+static void _gpio_output_destroy(struct gpio_output_t *output);
+
+
+void gpio_init(void) {
+	assert(gpio.chip == NULL);
+	if (
+		gpio.prog_running.pin >= 0
+		|| gpio.stream_online.pin >= 0
+		|| gpio.has_http_clients.pin >= 0
+	) {
+		A_MUTEX_INIT(&gpio.mutex);
+		LOG_INFO("GPIO: Using chip device: %s", gpio.path);
+		if ((gpio.chip = gpiod_chip_open(gpio.path)) != NULL) {
+			_gpio_output_init(&gpio.prog_running);
+			_gpio_output_init(&gpio.stream_online);
+			_gpio_output_init(&gpio.has_http_clients);
+		} else {
+			LOG_PERROR("GPIO: Can't initialize chip device %s", gpio.path);
+		}
+	}
+}
+
+void gpio_destroy(void) {
+	_gpio_output_destroy(&gpio.prog_running);
+	_gpio_output_destroy(&gpio.stream_online);
+	_gpio_output_destroy(&gpio.has_http_clients);
+	if (gpio.chip) {
+		gpiod_chip_close(gpio.chip);
+		gpio.chip = NULL;
+		A_MUTEX_DESTROY(&gpio.mutex);
+	}
+}
+
+int gpio_inner_set(struct gpio_output_t *output, bool state) {
+	int retval = 0;
+
+	assert(gpio.chip);
+	assert(output->line);
+	assert(output->state != state); // Must be checked in macro for the performance
+	A_MUTEX_LOCK(&gpio.mutex);
+
+	if (gpiod_line_set_value(output->line, (int)state) < 0) { \
+		LOG_PERROR("GPIO: Can't write value %d to line %s (will be disabled)", state, output->consumer); \
+		_gpio_output_destroy(output);
+		retval = -1;
+	}
+
+	A_MUTEX_UNLOCK(&gpio.mutex);
+	return retval;
+}
+
+static void _gpio_output_init(struct gpio_output_t *output) {
+	assert(gpio.chip);
+	assert(output->line == NULL);
+
+	A_CALLOC(output->consumer, strlen(gpio.consumer_prefix) + strlen(output->role) + 16);
+	sprintf(output->consumer, "%s::%s", gpio.consumer_prefix, output->role);
+
+	if (output->pin >= 0) {
+		if ((output->line = gpiod_chip_get_line(gpio.chip, output->pin)) != NULL) {
+			if (gpiod_line_request_output(output->line, output->consumer, 0) < 0) {
+				LOG_PERROR("GPIO: Can't request pin=%d as %s", output->pin, output->consumer);
+				_gpio_output_destroy(output);
+			}
+		} else {
+			LOG_PERROR("GPIO: Can't get pin=%d as %s", output->pin, output->consumer);
+		}
+	}
+}
+
+static void _gpio_output_destroy(struct gpio_output_t *output) {
+	if (output->line) {
+		gpiod_line_release(output->line);
+		output->line = NULL;
+	}
+	if (output->consumer) {
+		free(output->consumer);
+		output->consumer = NULL;
+	}
+	output->state = false;
+}

src/gpio/gpio.h

@@ -0,0 +1,83 @@
+/*****************************************************************************
+#                                                                            #
+#    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 <pthread.h>
+#include <gpiod.h>
+
+#include "../tools.h"
+#include "../logging.h"
+
+
+struct gpio_output_t {
+	int					pin;
+	const char			*role;
+	char 				*consumer;
+	struct gpiod_line	*line;
+	bool				state;
+};
+
+struct gpio_t {
+	char *path;
+	char *consumer_prefix;
+
+	struct gpio_output_t prog_running;
+	struct gpio_output_t stream_online;
+	struct gpio_output_t has_http_clients;
+
+	pthread_mutex_t		mutex;
+	struct gpiod_chip	*chip;
+};
+
+
+extern struct gpio_t gpio;
+
+
+void gpio_init(void);
+void gpio_destroy(void);
+int gpio_inner_set(struct gpio_output_t *output, bool state);
+
+
+#define SET_STATE(_output, _state) { \
+		if (_output.line && _output.state != _state) { \
+			if (!gpio_inner_set(&_output, _state)) { \
+				_output.state = _state; \
+			} \
+		} \
+	}
+
+INLINE void gpio_set_prog_running(bool state) {
+	SET_STATE(gpio.prog_running, state);
+}
+
+INLINE void gpio_set_stream_online(bool state) {
+	SET_STATE(gpio.stream_online, state);
+}
+
+INLINE void gpio_set_has_http_clients(bool state) {
+	SET_STATE(gpio.has_http_clients, state);
+}
+
+#undef SET_STATE

src/http/base64.c

@@ -0,0 +1,71 @@
+/*****************************************************************************
+#                                                                            #
+#    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 "base64.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "../tools.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};
+
+
+char *base64_encode(const unsigned char *str) {
+	size_t str_len = strlen((const char *)str);
+	size_t encoded_size = 4 * ((str_len + 2) / 3) + 1; // +1 for '\0'
+	char *encoded;
+
+	A_CALLOC(encoded, encoded_size);
+
+	for (unsigned str_index = 0, encoded_index = 0; str_index < str_len;) {
+		unsigned octet_a = (str_index < str_len ? (unsigned char)str[str_index++] : 0);
+		unsigned octet_b = (str_index < str_len ? (unsigned char)str[str_index++] : 0);
+		unsigned octet_c = (str_index < str_len ? (unsigned char)str[str_index++] : 0);
+
+		unsigned triple = (octet_a << 0x10) + (octet_b << 0x08) + octet_c;
+
+		encoded[encoded_index++] = _ENCODING_TABLE[(triple >> 3 * 6) & 0x3F];
+		encoded[encoded_index++] = _ENCODING_TABLE[(triple >> 2 * 6) & 0x3F];
+		encoded[encoded_index++] = _ENCODING_TABLE[(triple >> 1 * 6) & 0x3F];
+		encoded[encoded_index++] = _ENCODING_TABLE[(triple >> 0 * 6) & 0x3F];
+	}
+
+	for (unsigned index = 0; index < _MOD_TABLE[str_len % 3]; index++) {
+		encoded[encoded_size - 2 - index] = '=';
+	}
+
+	encoded[encoded_size - 1] = '\0';
+	return encoded;
+}

src/http/base64.h

@@ -1,4 +1,5 @@
 /*****************************************************************************
+#                                                                            #
 #    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
 #                                                                            #
 #    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
@@ -21,7 +22,5 @@
 
 #pragma once
 
-#include "../device.h"
 
-
-void jpeg_encoder_compress_buffer(struct device_t *dev, const unsigned index, const unsigned quality);
+char *base64_encode(const unsigned char *str);

src/http/blank.c

@@ -0,0 +1,161 @@
+/*****************************************************************************
+#                                                                            #
+#    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 "blank.h"
+
+#include <stdio.h>
+#include <stdbool.h>
+#include <setjmp.h>
+
+#include <jpeglib.h>
+
+#include "../tools.h"
+#include "../logging.h"
+#include "../picture.h"
+
+#include "data/blank_jpeg.h"
+
+
+struct _jpeg_error_manager_t {
+	struct jpeg_error_mgr	mgr; // Default manager
+	jmp_buf					jmp;
+};
+
+
+static struct picture_t *_init_internal(void);
+static struct picture_t *_init_external(const char *path);
+
+static int _jpeg_read_geometry(FILE *fp, unsigned *width, unsigned *height);
+static void _jpeg_error_handler(j_common_ptr jpeg);
+
+
+struct picture_t *blank_picture_init(const char *path) {
+	struct picture_t *blank = NULL;
+
+	if (path) {
+		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 struct picture_t *_init_internal(void) {
+	struct picture_t *blank;
+
+	blank = picture_init();
+	picture_set_data(blank, BLANK_JPEG_DATA, ARRAY_LEN(BLANK_JPEG_DATA));
+	blank->width = BLANK_JPEG_WIDTH;
+	blank->height = BLANK_JPEG_HEIGHT;
+	return blank;
+}
+
+static struct picture_t *_init_external(const char *path) {
+	FILE *fp = NULL;
+	struct picture_t *blank;
+
+	blank = picture_init();
+
+	if ((fp = fopen(path, "rb")) == NULL) {
+		LOG_PERROR("Can't open blank placeholder '%s'", path);
+		goto error;
+	}
+
+	if (_jpeg_read_geometry(fp, &blank->width, &blank->height) < 0) {
+		goto error;
+	}
+
+	if (fseek(fp, 0, SEEK_SET) < 0) {
+		LOG_PERROR("Can't seek to begin of the blank placeholder");
+		goto error;
+	}
+
+#	define CHUNK_SIZE ((size_t)(100 * 1024))
+	while (true) {
+		if (blank->used + CHUNK_SIZE >= blank->allocated) {
+			picture_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)) {
+				goto ok;
+			} else {
+				LOG_PERROR("Can't read blank placeholder");
+				goto error;
+			}
+		}
+	}
+#	undef CHUNK_SIZE
+
+	error:
+		picture_destroy(blank);
+		blank = NULL;
+
+	ok:
+		if (fp) {
+			fclose(fp);
+		}
+
+	return blank;
+}
+
+static int _jpeg_read_geometry(FILE *fp, unsigned *width, unsigned *height) {
+	struct jpeg_decompress_struct jpeg;
+	struct _jpeg_error_manager_t jpeg_error;
+
+	jpeg_create_decompress(&jpeg);
+
+	// https://stackoverflow.com/questions/19857766/error-handling-in-libjpeg
+	jpeg.err = jpeg_std_error((struct jpeg_error_mgr *)&jpeg_error);
+	jpeg_error.mgr.error_exit = _jpeg_error_handler;
+	if (setjmp(jpeg_error.jmp) < 0) {
+		jpeg_destroy_decompress(&jpeg);
+		return -1;
+	}
+
+	jpeg_stdio_src(&jpeg, fp);
+	jpeg_read_header(&jpeg, TRUE);
+	jpeg_start_decompress(&jpeg);
+
+	*width = jpeg.output_width;
+	*height = jpeg.output_height;
+
+	jpeg_destroy_decompress(&jpeg);
+	return 0;
+}
+
+static void _jpeg_error_handler(j_common_ptr jpeg) {
+	struct _jpeg_error_manager_t *jpeg_error = (struct _jpeg_error_manager_t *)jpeg->err;
+	char msg[JMSG_LENGTH_MAX];
+
+	(*jpeg_error->mgr.format_message)(jpeg, msg);
+	LOG_ERROR("Invalid blank placeholder: %s", msg);
+	longjmp(jpeg_error->jmp, -1);
+}

src/http/blank.h

@@ -0,0 +1,28 @@
+/*****************************************************************************
+#                                                                            #
+#    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 "../picture.h"
+
+
+struct picture_t *blank_picture_init(const char *path);

src/http/data/blank_jpeg.h

@@ -0,0 +1,723 @@
+/*****************************************************************************
+#                                                                            #
+#    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
+
+
+const unsigned BLANK_JPEG_WIDTH = 640;
+const unsigned BLANK_JPEG_HEIGHT = 480;
+
+const unsigned char 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,
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+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0xFF, 0xD5, 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, 0xD6, 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, 0xD7, 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,
+	0xD0, 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, 0xD1, 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, 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, 0xD3, 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, 0xD4, 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,
+	0xD5, 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, 0xD6, 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, 0xD7, 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, 0xD0, 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, 0xD1, 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,
+	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/http/data/index.html

@@ -0,0 +1,70 @@
+<!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>
+			</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/http/data/index_html.h

@@ -1,4 +1,5 @@
 /*****************************************************************************
+#                                                                            #
 #    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
 #                                                                            #
 #    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
@@ -21,16 +22,17 @@
 
 #pragma once
 
-#include "../config.h"
+#include "../../config.h"
 
 
-const char *HTML_INDEX_PAGE = " \
+const char HTML_INDEX_PAGE[] = " \
 	<!DOCTYPE html> \
 	\
 	<html> \
 	<head> \
 		<meta charset=\"utf-8\" /> \
 		<title>uStreamer</title> \
+		<style>body {font-family: monospace;}</style> \
 	</head> \
 	\
 	<body> \
@@ -38,50 +40,60 @@ const char *HTML_INDEX_PAGE = " \
 		<hr> \
 		<ul> \
 			<li> \
-				<a href=\"/state\"><b><samp>/state</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>key=abc123</samp></b><br> \
-						User-defined key, which is part of cookie <samp>stream_client</samp>, which allows<br> \
-						the stream client to determine its identifier and view statistics using <a href=\"/state\"><samp>/state</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>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>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>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>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><samp>dual_final_frames=1</samp></b><br> \
-						Enable workaround for Safari/WebKit bug when using option <samp>--drop-same-frames</samp>.<br> \
+						<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> \
 				</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/http/mime.c

@@ -0,0 +1,73 @@
+/*****************************************************************************
+#                                                                            #
+#    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 "mime.h"
+
+#include <string.h>
+
+#include <event2/util.h>
+
+#include "../tools.h"
+
+
+static const struct {
+	const char *ext;
+	const char *mime;
+} _MIME_TYPES[] = {
+	{"html",	"text/html"},
+	{"htm",		"text/html"},
+	{"css",		"text/css"},
+	{"js",		"text/javascript"},
+	{"txt",		"text/plain"},
+	{"jpg",		"image/jpeg"},
+	{"jpeg",	"image/jpeg"},
+	{"png",		"image/png"},
+	{"gif",		"image/gif"},
+	{"ico",		"image/x-icon"},
+	{"bmp",		"image/bmp"},
+	{"svg",		"image/svg+xml"},
+	{"swf",		"application/x-shockwave-flash"},
+	{"cab",		"application/x-shockwave-flash"},
+	{"jar",		"application/java-archive"},
+	{"json",	"application/json"},
+};
+
+
+const char *guess_mime_type(const char *path) {
+	char *dot;
+	char *ext;
+
+	dot = strrchr(path, '.');
+	if (dot == NULL || strchr(dot, '/') != NULL) {
+		goto misc;
+	}
+
+	ext = dot + 1;
+	for (unsigned index = 0; index < ARRAY_LEN(_MIME_TYPES); ++index) {
+		if (!evutil_ascii_strcasecmp(ext, _MIME_TYPES[index].ext)) {
+			return _MIME_TYPES[index].mime;
+		}
+	}
+
+	misc:
+		return "application/misc";
+}

src/http/mime.h

@@ -0,0 +1,26 @@
+/*****************************************************************************
+#                                                                            #
+#    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
+
+
+const char *guess_mime_type(const char *str);

src/http/path.c

@@ -0,0 +1,184 @@
+/*****************************************************************************
+#                                                                            #
+#    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 "path.h"
+
+#ifdef TEST_HTTP_PATH
+#	include <stdio.h>
+#	include <stdlib.h>
+#endif
+#include <string.h>
+
+#include "../tools.h"
+
+
+char *simplify_request_path(const char *str) {
+	// Based on Lighttpd sources:
+	//   - https://github.com/lighttpd/lighttpd1.4/blob/b31e7840d5403bc640579135b7004793b9ccd6c0/src/buffer.c#L840
+	//   - https://github.com/lighttpd/lighttpd1.4/blob/77c01f981725512653c01cde5ca74c11633dfec4/src/t/test_buffer.c
+
+	char ch; // Current character
+	char pre1; // The one before
+	char pre2; // The one before that
+	char *simplified;
+	char *start;
+	char *out;
+	char *slash;
+
+	A_CALLOC(simplified, strlen(str) + 1);
+
+	if (str[0] == '\0') {
+		simplified[0] = '\0';
+		return simplified;
+	}
+
+	start = simplified;
+	out = simplified;
+	slash = simplified;
+
+	// Skip leading spaces
+	for (; *str == ' '; ++str);
+
+	if (*str == '.') {
+		if (str[1] == '/' || str[1] == '\0') {
+			++str;
+		} else if (str[1] == '.' && (str[2] == '/' || str[2] == '\0')) {
+			str += 2;
+		}
+	}
+
+	pre1 = '\0';
+	ch = *(str++);
+
+	while (ch != '\0') {
+		pre2 = pre1;
+		pre1 = ch;
+
+		// Possibly: out == str - need to read first
+		ch = *str;
+		*out = pre1;
+
+		out++;
+		str++;
+		// (out <= str) still true; also now (slash < out)
+
+		if (ch == '/' || ch == '\0') {
+			size_t toklen = out - slash;
+
+			if (toklen == 3 && pre2 == '.' && pre1 == '.' && *slash == '/') {
+				// "/../" or ("/.." at end of string)
+				out = slash;
+				// If there is something before "/..", there is at least one
+				// component, which needs to be removed
+				if (out > start) {
+					--out;
+					for (; out > start && *out != '/'; --out);
+				}
+
+				// Don't kill trailing '/' at end of path
+				if (ch == '\0') {
+					++out;
+				}
+				// slash < out before, so out_new <= slash + 1 <= out_before <= str
+			} else if (toklen == 1 || (pre2 == '/' && pre1 == '.')) {
+				// "//" or "/./" or (("/" or "/.") at end of string)
+				out = slash;
+				// Don't kill trailing '/' at end of path
+				if (ch == '\0') {
+					++out;
+				}
+				// Slash < out before, so out_new <= slash + 1 <= out_before <= str
+			}
+
+			slash = out;
+		}
+	}
+
+	*out = '\0';
+	return simplified;
+}
+
+#ifdef TEST_HTTP_PATH
+
+int test_simplify_request_path(const char *sample, const char *expected) {
+	char *result = simplify_request_path(sample);
+	int retval = -!!strcmp(result, expected);
+
+	printf("Testing '%s' -> '%s' ... ", sample, expected);
+	if (retval == 0) {
+		printf("ok\n");
+	} else {
+		printf("FAILED; got '%s'\n", result);
+	}
+	free(result);
+	return retval;
+}
+
+int main(void) {
+	int retval = 0;
+
+#	define TEST_SIMPLIFY_REQUEST_PATH(_sample, _expected) { \
+			retval += test_simplify_request_path(_sample, _expected); \
+		}
+
+	TEST_SIMPLIFY_REQUEST_PATH("", "");
+	TEST_SIMPLIFY_REQUEST_PATH("   ", "");
+	TEST_SIMPLIFY_REQUEST_PATH("/", "/");
+	TEST_SIMPLIFY_REQUEST_PATH("//", "/");
+	TEST_SIMPLIFY_REQUEST_PATH("abc", "abc");
+	TEST_SIMPLIFY_REQUEST_PATH("abc//", "abc/");
+	TEST_SIMPLIFY_REQUEST_PATH("abc/./xyz", "abc/xyz");
+	TEST_SIMPLIFY_REQUEST_PATH("abc/.//xyz", "abc/xyz");
+	TEST_SIMPLIFY_REQUEST_PATH("abc/../xyz", "/xyz");
+	TEST_SIMPLIFY_REQUEST_PATH("/abc/./xyz", "/abc/xyz");
+	TEST_SIMPLIFY_REQUEST_PATH("/abc//./xyz", "/abc/xyz");
+	TEST_SIMPLIFY_REQUEST_PATH("/abc/../xyz", "/xyz");
+	TEST_SIMPLIFY_REQUEST_PATH("abc/../xyz/.", "/xyz/");
+	TEST_SIMPLIFY_REQUEST_PATH("/abc/../xyz/.", "/xyz/");
+	TEST_SIMPLIFY_REQUEST_PATH("abc/./xyz/..", "abc/");
+	TEST_SIMPLIFY_REQUEST_PATH("/abc/./xyz/..", "/abc/");
+	TEST_SIMPLIFY_REQUEST_PATH(".", "");
+	TEST_SIMPLIFY_REQUEST_PATH("..", "");
+	TEST_SIMPLIFY_REQUEST_PATH("...", "...");
+	TEST_SIMPLIFY_REQUEST_PATH("....", "....");
+	TEST_SIMPLIFY_REQUEST_PATH(".../", ".../");
+	TEST_SIMPLIFY_REQUEST_PATH("./xyz/..", "/");
+	TEST_SIMPLIFY_REQUEST_PATH(".//xyz/..", "/");
+	TEST_SIMPLIFY_REQUEST_PATH("/./xyz/..", "/");
+	TEST_SIMPLIFY_REQUEST_PATH(".././xyz/..", "/");
+	TEST_SIMPLIFY_REQUEST_PATH("/.././xyz/..", "/");
+	TEST_SIMPLIFY_REQUEST_PATH("/.././xyz/..", "/");
+	TEST_SIMPLIFY_REQUEST_PATH("../../../etc/passwd", "/etc/passwd");
+	TEST_SIMPLIFY_REQUEST_PATH("/../../../etc/passwd", "/etc/passwd");
+	TEST_SIMPLIFY_REQUEST_PATH("   ../../../etc/passwd", "/etc/passwd");
+	TEST_SIMPLIFY_REQUEST_PATH("   /../../../etc/passwd", "/etc/passwd");
+	TEST_SIMPLIFY_REQUEST_PATH("   /foo/bar/../../../etc/passwd", "/etc/passwd");
+
+#	undef TEST_SIMPLIFY_REQUEST_PATH
+
+	if (retval < 0) {
+		printf("===== TEST FAILED =====\n");
+	}
+	return retval;
+}
+
+#endif

src/http/path.h

@@ -0,0 +1,26 @@
+/*****************************************************************************
+#                                                                            #
+#    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
+
+
+char *simplify_request_path(const char *str);

src/http/server.h

@@ -1,4 +1,5 @@
 /*****************************************************************************
+#                                                                            #
 #    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
 #                                                                            #
 #    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
@@ -19,14 +20,18 @@
 *****************************************************************************/
 
 
+#pragma once
+
 #include <stdbool.h>
 
+#include <sys/stat.h>
+
 #include <event2/event.h>
 #include <event2/http.h>
 #include <event2/util.h>
 
-#include "tools.h"
-#include "stream.h"
+#include "../picture.h"
+#include "../stream.h"
 
 
 struct stream_client_t {
@@ -51,27 +56,32 @@ struct stream_client_t {
 };
 
 struct exposed_t {
-	struct picture_t	picture;
-	unsigned			width;
-	unsigned			height;
+	struct picture_t	*picture;
 	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;
+	long double			expose_begin_ts;
+	long double			expose_cmp_ts;
+	long double			expose_end_ts;
+	long double			last_as_blank_ts;
+
+	bool		notify_last_online;
+	unsigned	notify_last_width;
+	unsigned	notify_last_height;
 };
 
 struct http_server_runtime_t {
 	struct event_base		*base;
 	struct evhttp			*http;
 	evutil_socket_t			unix_fd;
+	char					*auth_token;
 	struct event			*refresh;
 	struct stream_t			*stream;
 	struct exposed_t		*exposed;
 	struct stream_client_t	*stream_clients;
 	unsigned				stream_clients_count;
+	struct picture_t		*blank;
 	unsigned				drop_same_frames_blank;
 };
 
@@ -80,10 +90,23 @@ struct http_server_t {
 	unsigned	port;
 	char		*unix_path;
 	bool		unix_rm;
+	mode_t		unix_mode;
+	bool		tcp_nodelay;
+	unsigned	timeout;
+
+	char		*user;
+	char		*passwd;
+	char		*static_path;
+	char		*allow_origin;
+
+	char		*blank_path;
+	int			last_as_blank;
 	unsigned	drop_same_frames;
+	bool		slowdown;
 	unsigned	fake_width;
 	unsigned	fake_height;
-	unsigned	timeout;
+
+	bool		notify_parent;
 
 	struct http_server_runtime_t *run;
 };

src/http/static.c

@@ -0,0 +1,90 @@
+/*****************************************************************************
+#                                                                            #
+#    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 "static.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <sys/stat.h>
+
+#include "../tools.h"
+#include "../logging.h"
+
+#include "path.h"
+
+
+char *find_static_file_path(const char *root_path, const char *request_path) {
+	char *simplified_path;
+	char *path = NULL;
+	struct stat st;
+
+	simplified_path = simplify_request_path(request_path);
+	if (simplified_path[0] == '\0') {
+		LOG_VERBOSE("HTTP: Invalid request path %s to static", request_path);
+		goto error;
+	}
+
+	A_CALLOC(path, strlen(root_path) + strlen(simplified_path) + 32);
+	sprintf(path, "%s/%s", root_path, simplified_path);
+
+#	define LOAD_STAT { \
+			if (lstat(path, &st) < 0) { \
+				LOG_VERBOSE_PERROR("HTTP: Can't stat() static path %s", path); \
+				goto error; \
+			} \
+		}
+
+	LOAD_STAT;
+	if (S_ISDIR(st.st_mode)) {
+		LOG_VERBOSE("HTTP: Requested static path %s is a directory, trying %s/index.html", path, path);
+		strcat(path, "/index.html");
+		LOAD_STAT;
+	}
+
+#	undef LOAD_STAT
+
+	if (!S_ISREG(st.st_mode)) {
+		LOG_VERBOSE("HTTP: Not a regular file: %s", path);
+		goto error;
+	}
+
+	if (access(path, R_OK) < 0) {
+		LOG_VERBOSE_PERROR("HTTP: Can't access() R_OK file %s", path);
+		goto error;
+	}
+
+	goto ok;
+
+	error:
+		if (path) {
+			free(path);
+		}
+		path = NULL;
+
+	ok:
+		free(simplified_path);
+
+	return path;
+}

src/http/static.h

@@ -0,0 +1,26 @@
+/*****************************************************************************
+#                                                                            #
+#    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
+
+
+char *find_static_file_path(const char *root_path, const char *request_path);

src/http/unix.c

@@ -0,0 +1,85 @@
+/*****************************************************************************
+#                                                                            #
+#    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 "unix.h"
+
+#include <stdbool.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <assert.h>
+
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/stat.h>
+
+#include <event2/http.h>
+#include <event2/util.h>
+
+#include "../tools.h"
+#include "../logging.h"
+
+
+evutil_socket_t evhttp_my_bind_unix(struct evhttp *http, const char *path, bool rm, mode_t mode) {
+	evutil_socket_t fd = -1;
+	struct sockaddr_un addr;
+
+#	define MAX_SUN_PATH (sizeof(addr.sun_path) - 1)
+
+	if (strlen(path) > MAX_SUN_PATH) {
+		LOG_ERROR("UNIX socket path is too long; max=%zu", MAX_SUN_PATH);
+		return -1;
+	}
+
+	MEMSET_ZERO(addr);
+	strncpy(addr.sun_path, path, MAX_SUN_PATH);
+	addr.sun_family = AF_UNIX;
+
+#	undef MAX_SUN_PATH
+
+	assert((fd = socket(AF_UNIX, SOCK_STREAM, 0)) >= 0);
+	assert(!evutil_make_socket_nonblocking(fd));
+
+	if (rm && unlink(path) < 0) {
+		if (errno != ENOENT) {
+			LOG_PERROR("Can't remove old UNIX socket '%s'", path);
+			return -1;
+		}
+	}
+	if (bind(fd, (struct sockaddr *)&addr, sizeof(struct sockaddr_un)) < 0) {
+		LOG_PERROR("Can't bind HTTP to UNIX socket '%s'", path);
+		return -1;
+	}
+	if (mode && chmod(path, mode) < 0) {
+		LOG_PERROR("Can't set permissions %o to UNIX socket '%s'", mode, path);
+		return -1;
+	}
+	if (listen(fd, 128) < 0) {
+		LOG_PERROR("Can't listen UNIX socket '%s'", path);
+		return -1;
+	}
+	if (evhttp_accept_socket(http, fd) < 0) {
+		LOG_PERROR("Can't evhttp_accept_socket() UNIX socket '%s'", path);
+		return -1;
+	}
+	return fd;
+}

src/http/unix.h

@@ -0,0 +1,33 @@
+/*****************************************************************************
+#                                                                            #
+#    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 <sys/stat.h>
+
+#include <event2/http.h>
+#include <event2/util.h>
+
+
+evutil_socket_t evhttp_my_bind_unix(struct evhttp *http, const char *path, bool rm, mode_t mode);

src/http/uri.c

@@ -0,0 +1,54 @@
+/*****************************************************************************
+#                                                                            #
+#    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 "uri.h"
+
+#include <stdbool.h>
+
+#include <event2/http.h>
+#include <event2/util.h>
+#include <event2/keyvalq_struct.h>
+
+
+bool uri_get_true(struct evkeyvalq *params, const char *key) {
+	const char *value_str;
+
+	if ((value_str = evhttp_find_header(params, key)) != NULL) {
+		if (
+			value_str[0] == '1'
+			|| !evutil_ascii_strcasecmp(value_str, "true")
+			|| !evutil_ascii_strcasecmp(value_str, "yes")
+		) {
+			return true;
+		}
+	}
+	return false;
+}
+
+char *uri_get_string(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;
+}

src/http/uri.h

@@ -0,0 +1,32 @@
+/*****************************************************************************
+#                                                                            #
+#    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 <event2/http.h>
+#include <event2/keyvalq_struct.h>
+
+
+bool uri_get_true(struct evkeyvalq *params, const char *key);
+char *uri_get_string(struct evkeyvalq *params, const char *key);

src/logging.c

@@ -0,0 +1,34 @@
+/*****************************************************************************
+#                                                                            #
+#    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 <pthread.h>
+
+#include "logging.h"
+
+
+enum log_level_t log_level;
+
+bool log_colored;
+
+pthread_mutex_t log_mutex;

src/logging.h

@@ -1,4 +1,5 @@
 /*****************************************************************************
+#                                                                            #
 #    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
 #                                                                            #
 #    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
@@ -22,6 +23,7 @@
 #pragma once
 
 #include <stdio.h>
+#include <stdbool.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
@@ -31,27 +33,44 @@
 
 #include <pthread.h>
 
-#include <sys/types.h>
-#include <sys/syscall.h>
-
 #include "tools.h"
+#include "threading.h"
 
 
-unsigned log_level;
-pthread_mutex_t log_mutex;
+enum log_level_t {
+    LOG_LEVEL_INFO,
+    LOG_LEVEL_PERF,
+    LOG_LEVEL_VERBOSE,
+    LOG_LEVEL_DEBUG,
+};
 
 
-#define LOG_LEVEL_INFO		0
-#define LOG_LEVEL_PERF		1
-#define LOG_LEVEL_VERBOSE	2
-#define LOG_LEVEL_DEBUG		3
+extern enum log_level_t log_level;
+
+extern bool log_colored;
+
+extern pthread_mutex_t log_mutex;
 
 
-#define LOGGING_INIT	assert(!pthread_mutex_init(&log_mutex, NULL))
-#define LOGGING_DESTROY	assert(!pthread_mutex_destroy(&log_mutex))
+#define LOGGING_INIT { \
+		log_level = LOG_LEVEL_INFO; \
+		log_colored = isatty(1); \
+		A_MUTEX_INIT(&log_mutex); \
+	}
 
-#define LOGGING_LOCK	assert(!pthread_mutex_lock(&log_mutex))
-#define LOGGING_UNLOCK	assert(!pthread_mutex_unlock(&log_mutex))
+#define LOGGING_DESTROY A_MUTEX_DESTROY(&log_mutex)
+
+#define LOGGING_LOCK	A_MUTEX_LOCK(&log_mutex)
+#define LOGGING_UNLOCK	A_MUTEX_UNLOCK(&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) { \
@@ -70,56 +89,83 @@ pthread_mutex_t log_mutex;
 		} \
 	}
 
-#define LOG_PRINTF_NOLOCK(_label, _msg, ...) { \
-		printf("-- " _label " [%.03Lf tid=%ld] -- " _msg "\n", get_now_monotonic(), syscall(SYS_gettid), ##__VA_ARGS__); \
+
+#define LOG_PRINTF_NOLOCK(_label_color, _label, _msg_color, _msg, ...) { \
+		char _tname_buf[MAX_THREAD_NAME] = {0}; \
+		thread_get_name(_tname_buf); \
+		if (log_colored) { \
+			printf(COLOR_GRAY "-- " _label_color _label COLOR_GRAY " [%.03Lf %9s]" " -- " COLOR_RESET _msg_color _msg COLOR_RESET, \
+				get_now_monotonic(), _tname_buf, ##__VA_ARGS__); \
+		} else { \
+			printf("-- " _label " [%.03Lf %9s] -- " _msg, \
+				get_now_monotonic(), _tname_buf, ##__VA_ARGS__); \
+		} \
+		putchar('\n'); \
 		fflush(stdout); \
 	}
 
+#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, ...) { \
-		LOGGING_LOCK; \
-		LOG_PRINTF_NOLOCK("ERROR", _msg, ##__VA_ARGS__); \
-		LOGGING_UNLOCK; \
+		LOG_PRINTF(COLOR_RED, "ERROR", COLOR_RED, _msg, ##__VA_ARGS__); \
 	}
 
 #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; \
+		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, ...) { \
-		LOGGING_LOCK; \
-		LOG_PRINTF_NOLOCK("INFO ", _msg, ##__VA_ARGS__); \
-		LOGGING_UNLOCK; \
+		LOG_PRINTF(COLOR_GREEN, "INFO ", "", _msg, ##__VA_ARGS__); \
 	}
 
 #define LOG_INFO_NOLOCK(_msg, ...) { \
-		LOG_PRINTF_NOLOCK("INFO ", _msg, ##__VA_ARGS__); \
+		LOG_PRINTF_NOLOCK(COLOR_GREEN, "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; \
+			LOG_PRINTF(COLOR_CYAN, "PERF ", COLOR_CYAN, _msg, ##__VA_ARGS__); \
+		} \
+	}
+
+#define LOG_PERF_FPS(_msg, ...) { \
+		if (log_level >= LOG_LEVEL_PERF) { \
+			LOG_PRINTF(COLOR_YELLOW, "PERF ", COLOR_YELLOW, _msg, ##__VA_ARGS__); \
 		} \
 	}
 
 #define LOG_VERBOSE(_msg, ...) { \
 		if (log_level >= LOG_LEVEL_VERBOSE) { \
-			LOGGING_LOCK; \
-			LOG_PRINTF_NOLOCK("VERB ", _msg, ##__VA_ARGS__); \
-			LOGGING_UNLOCK; \
+			LOG_PRINTF(COLOR_BLUE, "VERB ", COLOR_BLUE, _msg, ##__VA_ARGS__); \
+		} \
+	}
+
+#define LOG_VERBOSE_PERROR(_msg, ...) { \
+		if (log_level >= LOG_LEVEL_VERBOSE) { \
+			char _perror_buf[1024] = {0}; \
+			char *_perror_ptr = errno_to_string(errno, _perror_buf, 1024); \
+			LOG_PRINTF(COLOR_BLUE, "VERB ", COLOR_BLUE, _msg ": %s", ##__VA_ARGS__, _perror_ptr); \
 		} \
 	}
 
 #define LOG_DEBUG(_msg, ...) { \
 		if (log_level >= LOG_LEVEL_DEBUG) { \
-			LOGGING_LOCK; \
-			LOG_PRINTF_NOLOCK("DEBUG", _msg, ##__VA_ARGS__); \
-			LOGGING_UNLOCK; \
+			LOG_PRINTF(COLOR_GRAY, "DEBUG", COLOR_GRAY, _msg, ##__VA_ARGS__); \
 		} \
 	}
+
+
+INLINE char *errno_to_string(int error, char *buf, size_t size) {
+#	if defined(__GLIBC__) && defined(_GNU_SOURCE)
+	return strerror_r(error, buf, size);
+#	else
+	strerror_r(error, buf, size);
+	return buf;
+#	endif
+}

src/main.c

@@ -1,4 +1,5 @@
 /*****************************************************************************
+#                                                                            #
 #    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
 #                                                                            #
 #    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
@@ -24,202 +25,38 @@
 #	error WTF dude? Asserts are good things!
 #endif
 
+#include <limits.h>
+#if CHAR_BIT != 8
+#	error There are not 8 bits in a char!
+#endif
+
 #include <stdio.h>
 #include <stdbool.h>
 #include <signal.h>
-#include <getopt.h>
 
 #include <pthread.h>
 
-#include "config.h"
 #include "tools.h"
+#include "threading.h"
 #include "logging.h"
+#include "options.h"
 #include "device.h"
 #include "encoder.h"
 #include "stream.h"
-#include "http.h"
+#include "http/server.h"
+#ifdef WITH_GPIO
+#	include "gpio/gpio.h"
+#endif
 
 
-static const char _short_opts[] = "d:i:x:y:f:a:z:tn:w:q:c:s:p:u:er: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,	'm'},
-	{"tv-standard",				required_argument,	NULL,	'a'},
-	{"desired-fps",				required_argument,	NULL,	'f'},
-	{"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'},
-	{"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'},
-	{"unix",					required_argument,	NULL,	'u'},
-	{"unix-rm",					no_argument,		NULL,	'e'},
-	{"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("    -m|--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("    -f|--desired-fps <N>             -- Desired FPS; default: maximum as possible.\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);
-	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("    --unix <path>              -- Bind to UNIX domain socket. Default: disabled\n\n");
-	printf("    --unix-rm                  -- Try to remove old UNIX socket file before binding. Default: disabled\n\n");
-	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 /state. Default: disabled\n\n");
-	printf("    --fake-height <N>          -- Override image height for /state. 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 'm':	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 'f':	OPT_UNSIGNED(dev->desired_fps, "--desired-fps", 0, 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");
-			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 'u':	OPT_SET(server->unix_path, optarg);
-			case 'e':	OPT_SET(server->unix_rm, true);
-			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 _main_context_t {
 	struct stream_t			*stream;
 	struct http_server_t	*server;
 };
 
-static struct main_context_t *_ctx;
+static struct _main_context_t *_ctx;
 
-static void _block_thread_signals() {
+static void _block_thread_signals(void) {
 	sigset_t mask;
 	assert(!sigemptyset(&mask));
 	assert(!sigaddset(&mask, SIGINT));
@@ -228,12 +65,14 @@ static void _block_thread_signals() {
 }
 
 static void *_stream_loop_thread(UNUSED void *arg) {
+	A_THREAD_RENAME("stream");
 	_block_thread_signals();
 	stream_loop(_ctx->stream);
 	return NULL;
 }
 
 static void *_server_loop_thread(UNUSED void *arg) {
+	A_THREAD_RENAME("http");
 	_block_thread_signals();
 	http_server_loop(_ctx->server);
 	return NULL;
@@ -245,7 +84,7 @@ static void _signal_handler(int signum) {
 	http_server_loop_break(_ctx->server);
 }
 
-static void _install_signal_handlers() {
+static void _install_signal_handlers(void) {
 	struct sigaction sig_act;
 
 	MEMSET_ZERO(sig_act);
@@ -265,6 +104,7 @@ static void _install_signal_handlers() {
 }
 
 int main(int argc, char *argv[]) {
+	struct options_t *options;
 	struct device_t *dev;
 	struct encoder_t *encoder;
 	struct stream_t *stream;
@@ -272,30 +112,44 @@ int main(int argc, char *argv[]) {
 	int exit_code = 0;
 
 	LOGGING_INIT;
+	A_THREAD_RENAME("main");
+	options = options_init(argc, argv);
 
 	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) {
+	if ((exit_code = options_parse(options, dev, encoder, server)) == 0) {
+#		ifdef WITH_GPIO
+		gpio_init();
+#		endif
+
 		_install_signal_handlers();
-		encoder_prepare(encoder, dev);
 
 		pthread_t stream_loop_tid;
 		pthread_t server_loop_tid;
-		struct main_context_t ctx;
+		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);
+#			ifdef WITH_GPIO
+			gpio_set_prog_running(true);
+#			endif
+
+			A_THREAD_CREATE(&stream_loop_tid, _stream_loop_thread, NULL);
+			A_THREAD_CREATE(&server_loop_tid, _server_loop_thread, NULL);
+			A_THREAD_JOIN(server_loop_tid);
+			A_THREAD_JOIN(stream_loop_tid);
 		}
+
+#		ifdef WITH_GPIO
+		gpio_set_prog_running(false);
+		gpio_destroy();
+#		endif
 	}
 
 	http_server_destroy(server);
@@ -303,6 +157,10 @@ int main(int argc, char *argv[]) {
 	encoder_destroy(encoder);
 	device_destroy(dev);
 
+	options_destroy(options);
+	if (exit_code == 0) {
+		LOG_INFO("Bye-bye");
+	}
 	LOGGING_DESTROY;
 	return (exit_code < 0 ? 1 : 0);
 }

src/options.c

@@ -0,0 +1,691 @@
+/*****************************************************************************
+#                                                                            #
+#    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 "options.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <string.h>
+#include <strings.h>
+#include <ctype.h>
+#include <limits.h>
+#include <getopt.h>
+#include <errno.h>
+#include <assert.h>
+
+#include "config.h"
+#include "logging.h"
+#include "process.h"
+#include "device.h"
+#include "encoder.h"
+#include "http/server.h"
+#ifdef WITH_GPIO
+#	include "gpio/gpio.h"
+#endif
+
+
+enum _OPT_VALUES {
+	_O_DEVICE = 'd',
+	_O_INPUT = 'i',
+	_O_RESOLUTION = 'r',
+	_O_FORMAT = 'm',
+	_O_TV_STANDARD = 'a',
+	_O_IO_METHOD = 'I',
+	_O_DESIRED_FPS = 'f',
+	_O_MIN_FRAME_SIZE = 'z',
+	_O_PERSISTENT = 'n',
+	_O_DV_TIMINGS = 't',
+	_O_BUFFERS = 'b',
+	_O_WORKERS = 'w',
+	_O_QUALITY = 'q',
+	_O_ENCODER = 'c',
+#ifdef WITH_OMX
+	_O_GLITCHED_RESOLUTIONS = 'g',
+#endif
+
+	_O_HOST = 's',
+	_O_PORT = 'p',
+	_O_UNIX = 'U',
+	_O_UNIX_RM = 'D',
+	_O_UNIX_MODE = 'M',
+	_O_BLANK = 'k',
+	_O_LAST_AS_BLANK = 'K',
+	_O_DROP_SAME_FRAMES = 'e',
+	_O_SLOWDOWN = 'l',
+	_O_FAKE_RESOLUTION = 'R',
+
+	_O_HELP = 'h',
+	_O_VERSION = 'v',
+
+	// Longs only
+
+	_O_DEVICE_TIMEOUT = 10000,
+	_O_DEVICE_ERROR_DELAY,
+
+	_O_IMAGE_DEFAULT,
+	_O_BRIGHTNESS,
+	_O_CONTRAST,
+	_O_SATURATION,
+	_O_HUE,
+	_O_GAMMA,
+	_O_SHARPNESS,
+	_O_BACKLIGHT_COMPENSATION,
+	_O_WHITE_BALANCE,
+	_O_GAIN,
+	_O_COLOR_EFFECT,
+	_O_FLIP_VERTICAL,
+	_O_FLIP_HORIZONTAL,
+
+	_O_USER,
+	_O_PASSWD,
+	_O_STATIC,
+	_O_ALLOW_ORIGIN,
+	_O_TCP_NODELAY,
+	_O_SERVER_TIMEOUT,
+
+#ifdef WITH_GPIO
+	_O_GPIO_DEVICE,
+	_O_GPIO_CONSUMER_PREFIX,
+	_O_GPIO_PROG_RUNNING,
+	_O_GPIO_STREAM_ONLINE,
+	_O_GPIO_HAS_HTTP_CLIENTS,
+#endif
+
+#ifdef HAS_PDEATHSIG
+	_O_EXIT_ON_PARENT_DEATH,
+#endif
+#ifdef WITH_SETPROCTITLE
+	_O_PROCESS_NAME_PREFIX,
+#endif
+	_O_NOTIFY_PARENT,
+
+	_O_LOG_LEVEL,
+	_O_PERF,
+	_O_VERBOSE,
+	_O_DEBUG,
+	_O_FORCE_LOG_COLORS,
+	_O_NO_LOG_COLORS,
+
+	_O_FEATURES,
+};
+
+static const struct option _LONG_OPTS[] = {
+	{"device",					required_argument,	NULL,	_O_DEVICE},
+	{"input",					required_argument,	NULL,	_O_INPUT},
+	{"resolution",				required_argument,	NULL,	_O_RESOLUTION},
+	{"format",					required_argument,	NULL,	_O_FORMAT},
+	{"tv-standard",				required_argument,	NULL,	_O_TV_STANDARD},
+	{"io-method",				required_argument,	NULL,	_O_IO_METHOD},
+	{"desired-fps",				required_argument,	NULL,	_O_DESIRED_FPS},
+	{"min-frame-size",			required_argument,	NULL,	_O_MIN_FRAME_SIZE},
+	{"persistent",				no_argument,		NULL,	_O_PERSISTENT},
+	{"dv-timings",				no_argument,		NULL,	_O_DV_TIMINGS},
+	{"buffers",					required_argument,	NULL,	_O_BUFFERS},
+	{"workers",					required_argument,	NULL,	_O_WORKERS},
+	{"quality",					required_argument,	NULL,	_O_QUALITY},
+	{"encoder",					required_argument,	NULL,	_O_ENCODER},
+#	ifdef WITH_OMX
+	{"glitched-resolutions",	required_argument,	NULL,	_O_GLITCHED_RESOLUTIONS},
+#	endif
+	{"device-timeout",			required_argument,	NULL,	_O_DEVICE_TIMEOUT},
+	{"device-error-delay",		required_argument,	NULL,	_O_DEVICE_ERROR_DELAY},
+
+	{"image-default",			no_argument,		NULL,	_O_IMAGE_DEFAULT},
+	{"brightness",				required_argument,	NULL,	_O_BRIGHTNESS},
+	{"contrast",				required_argument,	NULL,	_O_CONTRAST},
+	{"saturation",				required_argument,	NULL,	_O_SATURATION},
+	{"hue",						required_argument,	NULL,	_O_HUE},
+	{"gamma",					required_argument,	NULL,	_O_GAMMA},
+	{"sharpness",				required_argument,	NULL,	_O_SHARPNESS},
+	{"backlight-compensation",	required_argument,	NULL,	_O_BACKLIGHT_COMPENSATION},
+	{"white-balance",			required_argument,	NULL,	_O_WHITE_BALANCE},
+	{"gain",					required_argument,	NULL,	_O_GAIN},
+	{"color-effect",			required_argument,	NULL,	_O_COLOR_EFFECT},
+	{"flip-vertical",			required_argument,	NULL,	_O_FLIP_VERTICAL},
+	{"flip-horizontal",			required_argument,	NULL,	_O_FLIP_HORIZONTAL},
+
+	{"host",					required_argument,	NULL,	_O_HOST},
+	{"port",					required_argument,	NULL,	_O_PORT},
+	{"unix",					required_argument,	NULL,	_O_UNIX},
+	{"unix-rm",					no_argument,		NULL,	_O_UNIX_RM},
+	{"unix-mode",				required_argument,	NULL,	_O_UNIX_MODE},
+	{"user",					required_argument,	NULL,	_O_USER},
+	{"passwd",					required_argument,	NULL,	_O_PASSWD},
+	{"static",					required_argument,	NULL,	_O_STATIC},
+	{"blank",					required_argument,	NULL,	_O_BLANK},
+	{"last-as-blank",			required_argument,	NULL,	_O_LAST_AS_BLANK},
+	{"drop-same-frames",		required_argument,	NULL,	_O_DROP_SAME_FRAMES},
+	{"slowdown",				no_argument,		NULL,	_O_SLOWDOWN},
+	{"allow-origin",			required_argument,	NULL,	_O_ALLOW_ORIGIN},
+	{"fake-resolution",			required_argument,	NULL,	_O_FAKE_RESOLUTION},
+	{"tcp-nodelay",				no_argument,		NULL,	_O_TCP_NODELAY},
+	{"server-timeout",			required_argument,	NULL,	_O_SERVER_TIMEOUT},
+
+#ifdef WITH_GPIO
+	{"gpio-device",				required_argument,	NULL,	_O_GPIO_DEVICE},
+	{"gpio-consumer-prefix",	required_argument,	NULL,	_O_GPIO_CONSUMER_PREFIX},
+	{"gpio-prog-running",		required_argument,	NULL,	_O_GPIO_PROG_RUNNING},
+	{"gpio-stream-online",		required_argument,	NULL,	_O_GPIO_STREAM_ONLINE},
+	{"gpio-has-http-clients",	required_argument,	NULL,	_O_GPIO_HAS_HTTP_CLIENTS},
+#endif
+
+#ifdef HAS_PDEATHSIG
+	{"exit-on-parent-death",	no_argument,		NULL,	_O_EXIT_ON_PARENT_DEATH},
+#endif
+#ifdef WITH_SETPROCTITLE
+	{"process-name-prefix",		required_argument,	NULL,	_O_PROCESS_NAME_PREFIX},
+#endif
+	{"notify-parent",			no_argument,		NULL,	_O_NOTIFY_PARENT},
+
+	{"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},
+	{"features",				no_argument,		NULL,	_O_FEATURES},
+
+	{NULL, 0, NULL, 0},
+};
+
+
+static int _parse_resolution(const char *str, unsigned *width, unsigned *height, bool limited);
+#ifdef WITH_OMX
+static int _parse_glitched_resolutions(const char *str, struct encoder_t *encoder);
+#endif
+
+static void _features(void);
+static void _help(struct device_t *dev, struct encoder_t *encoder, struct http_server_t *server);
+
+
+struct options_t *options_init(int argc, char *argv[]) {
+	struct options_t *options;
+
+	A_CALLOC(options, 1);
+	options->argc = argc;
+	options->argv = argv;
+
+	A_CALLOC(options->argv_copy, argc);
+	for (int index = 0; index < argc; ++index) {
+		assert(options->argv_copy[index] = strdup(argv[index]));
+	}
+
+	return options;
+}
+
+void options_destroy(struct options_t *options) {
+	for (int index = 0; index < options->argc; ++index) {
+		free(options->argv_copy[index]);
+	}
+	free(options->argv_copy);
+	free(options);
+}
+
+
+int options_parse(struct options_t *options, struct device_t *dev, struct encoder_t *encoder, struct http_server_t *server) {
+#	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_RESOLUTION(_name, _dest_width, _dest_height, _limited) { \
+			switch (_parse_resolution(optarg, &_dest_width, &_dest_height, _limited)) { \
+				case -1: \
+					printf("Invalid resolution format for '%s=%s'\n", _name, optarg); \
+					return -1; \
+				case -2: \
+					printf("Invalid width of '%s=%s': min=%u, max=%u\n", _name, optarg, VIDEO_MIN_WIDTH, VIDEO_MAX_WIDTH); \
+					return -1; \
+				case -3: \
+					printf("Invalid height of '%s=%s': min=%u, max=%u\n", _name, optarg, VIDEO_MIN_HEIGHT, VIDEO_MAX_HEIGHT); \
+					return -1; \
+				case 0: break; \
+				default: assert(0 && "Unknown error"); \
+			} \
+			break; \
+		}
+
+#	define OPT_PARSE(_name, _dest, _func, _invalid, _available) { \
+			if ((_dest = _func(optarg)) == _invalid) { \
+				printf("Unknown " _name ": %s; available: %s\n", optarg, _available); \
+				return -1; \
+			} \
+			break; \
+		}
+
+#	define OPT_CTL_DEFAULT_NOBREAK(_dest) { \
+			dev->ctl._dest.mode = CTL_MODE_DEFAULT; \
+		}
+
+#	define OPT_CTL_MANUAL(_dest) { \
+			if (!strcasecmp(optarg, "default")) { \
+				OPT_CTL_DEFAULT_NOBREAK(_dest); \
+			} else { \
+				dev->ctl._dest.mode = CTL_MODE_VALUE; \
+				OPT_NUMBER("--"#_dest, dev->ctl._dest.value, INT_MIN, INT_MAX, 0); \
+			} \
+			break; \
+		}
+
+#	define OPT_CTL_AUTO(_dest) { \
+			if (!strcasecmp(optarg, "default")) { \
+				OPT_CTL_DEFAULT_NOBREAK(_dest); \
+			} else if (!strcasecmp(optarg, "auto")) { \
+				dev->ctl._dest.mode = CTL_MODE_AUTO; \
+			} else { \
+				dev->ctl._dest.mode = CTL_MODE_VALUE; \
+				OPT_NUMBER("--"#_dest, dev->ctl._dest.value, INT_MIN, INT_MAX, 0); \
+			} \
+			break; \
+		}
+
+	int ch;
+	int short_index;
+	int opt_index;
+	char short_opts[1024] = {0};
+#	ifdef WITH_SETPROCTITLE
+	char *process_name_prefix = NULL;
+#	endif
+
+	for (short_index = 0, opt_index = 0; _LONG_OPTS[opt_index].name != NULL; ++opt_index) {
+		if (isalpha(_LONG_OPTS[opt_index].val)) {
+			short_opts[short_index] = _LONG_OPTS[opt_index].val;
+			++short_index;
+			if (_LONG_OPTS[opt_index].has_arg == required_argument) {
+				short_opts[short_index] = ':';
+				++short_index;
+			}
+		}
+	}
+
+	while ((ch = getopt_long(options->argc, options->argv_copy, short_opts, _LONG_OPTS, NULL)) >= 0) {
+		switch (ch) {
+			case _O_DEVICE:			OPT_SET(dev->path, optarg);
+			case _O_INPUT:			OPT_NUMBER("--input", dev->input, 0, 128, 0);
+			case _O_RESOLUTION:		OPT_RESOLUTION("--resolution", dev->width, dev->height, true);
+#			pragma GCC diagnostic ignored "-Wsign-compare"
+#			pragma GCC diagnostic push
+			case _O_FORMAT:			OPT_PARSE("pixel format", dev->format, device_parse_format, FORMAT_UNKNOWN, FORMATS_STR);
+#			pragma GCC diagnostic pop
+			case _O_TV_STANDARD:	OPT_PARSE("TV standard", dev->standard, device_parse_standard, STANDARD_UNKNOWN, STANDARDS_STR);
+			case _O_IO_METHOD:		OPT_PARSE("IO method", dev->io_method, device_parse_io_method, IO_METHOD_UNKNOWN, IO_METHODS_STR);
+			case _O_DESIRED_FPS:	OPT_NUMBER("--desired-fps", dev->desired_fps, 0, VIDEO_MAX_FPS, 0);
+			case _O_MIN_FRAME_SIZE:	OPT_NUMBER("--min-frame-size", dev->min_frame_size, 1, 8192, 0);
+			case _O_PERSISTENT:		OPT_SET(dev->persistent, true);
+			case _O_DV_TIMINGS:		OPT_SET(dev->dv_timings, true);
+			case _O_BUFFERS:		OPT_NUMBER("--buffers", dev->n_buffers, 1, 32, 0);
+			case _O_WORKERS:		OPT_NUMBER("--workers", dev->n_workers, 1, 32, 0);
+			case _O_QUALITY:		OPT_NUMBER("--quality", encoder->quality, 1, 100, 0);
+			case _O_ENCODER:		OPT_PARSE("encoder type", encoder->type, encoder_parse_type, ENCODER_TYPE_UNKNOWN, ENCODER_TYPES_STR);
+#			ifdef WITH_OMX
+			case _O_GLITCHED_RESOLUTIONS:
+				if (_parse_glitched_resolutions(optarg, encoder) < 0) {
+					return -1;
+				}
+				break;
+#			endif
+			case _O_DEVICE_TIMEOUT:		OPT_NUMBER("--device-timeout", dev->timeout, 1, 60, 0);
+			case _O_DEVICE_ERROR_DELAY:	OPT_NUMBER("--device-error-delay", dev->error_delay, 1, 60, 0);
+
+			case _O_IMAGE_DEFAULT:
+				OPT_CTL_DEFAULT_NOBREAK(brightness);
+				OPT_CTL_DEFAULT_NOBREAK(contrast);
+				OPT_CTL_DEFAULT_NOBREAK(saturation);
+				OPT_CTL_DEFAULT_NOBREAK(hue);
+				OPT_CTL_DEFAULT_NOBREAK(gamma);
+				OPT_CTL_DEFAULT_NOBREAK(sharpness);
+				OPT_CTL_DEFAULT_NOBREAK(backlight_compensation);
+				OPT_CTL_DEFAULT_NOBREAK(white_balance);
+				OPT_CTL_DEFAULT_NOBREAK(gain);
+				OPT_CTL_DEFAULT_NOBREAK(color_effect);
+				OPT_CTL_DEFAULT_NOBREAK(flip_vertical);
+				OPT_CTL_DEFAULT_NOBREAK(flip_horizontal);
+				break;
+			case _O_BRIGHTNESS:				OPT_CTL_AUTO(brightness);
+			case _O_CONTRAST:				OPT_CTL_MANUAL(contrast);
+			case _O_SATURATION:				OPT_CTL_MANUAL(saturation);
+			case _O_HUE:					OPT_CTL_AUTO(hue);
+			case _O_GAMMA:					OPT_CTL_MANUAL(gamma);
+			case _O_SHARPNESS:				OPT_CTL_MANUAL(sharpness);
+			case _O_BACKLIGHT_COMPENSATION:	OPT_CTL_MANUAL(backlight_compensation);
+			case _O_WHITE_BALANCE:			OPT_CTL_AUTO(white_balance);
+			case _O_GAIN:					OPT_CTL_AUTO(gain);
+			case _O_COLOR_EFFECT:			OPT_CTL_MANUAL(color_effect);
+			case _O_FLIP_VERTICAL:			OPT_CTL_MANUAL(flip_vertical);
+			case _O_FLIP_HORIZONTAL:		OPT_CTL_MANUAL(flip_horizontal);
+
+			case _O_HOST:				OPT_SET(server->host, optarg);
+			case _O_PORT:				OPT_NUMBER("--port", server->port, 1, 65535, 0);
+			case _O_UNIX:				OPT_SET(server->unix_path, optarg);
+			case _O_UNIX_RM:			OPT_SET(server->unix_rm, true);
+			case _O_UNIX_MODE:			OPT_NUMBER("--unix-mode", server->unix_mode, INT_MIN, INT_MAX, 8);
+			case _O_USER:				OPT_SET(server->user, optarg);
+			case _O_PASSWD:				OPT_SET(server->passwd, optarg);
+			case _O_STATIC:				OPT_SET(server->static_path, optarg);
+			case _O_BLANK:				OPT_SET(server->blank_path, optarg);
+			case _O_LAST_AS_BLANK:		OPT_NUMBER("--last-as-blank", server->last_as_blank, 0, 86400, 0);
+			case _O_DROP_SAME_FRAMES:	OPT_NUMBER("--drop-same-frames", server->drop_same_frames, 0, VIDEO_MAX_FPS, 0);
+			case _O_SLOWDOWN:			OPT_SET(server->slowdown, true);
+			case _O_FAKE_RESOLUTION:	OPT_RESOLUTION("--fake-resolution", server->fake_width, server->fake_height, false);
+			case _O_ALLOW_ORIGIN:		OPT_SET(server->allow_origin, optarg);
+			case _O_TCP_NODELAY:		OPT_SET(server->tcp_nodelay, true);
+			case _O_SERVER_TIMEOUT:		OPT_NUMBER("--server-timeout", server->timeout, 1, 60, 0);
+
+#			ifdef WITH_GPIO
+			case _O_GPIO_DEVICE:			OPT_SET(gpio.path, optarg);
+			case _O_GPIO_CONSUMER_PREFIX:	OPT_SET(gpio.consumer_prefix, optarg);
+			case _O_GPIO_PROG_RUNNING:		OPT_NUMBER("--gpio-prog-running", gpio.prog_running.pin, 0, 256, 0);
+			case _O_GPIO_STREAM_ONLINE:		OPT_NUMBER("--gpio-stream-online", gpio.stream_online.pin, 0, 256, 0);
+			case _O_GPIO_HAS_HTTP_CLIENTS:	OPT_NUMBER("--gpio-has-http-clients", gpio.has_http_clients.pin, 0, 256, 0);
+#			endif
+
+#			ifdef HAS_PDEATHSIG
+			case _O_EXIT_ON_PARENT_DEATH:
+				if (process_track_parent_death() < 0) {
+					return -1;
+				};
+				break;
+#			endif
+#			ifdef WITH_SETPROCTITLE
+			case _O_PROCESS_NAME_PREFIX:	OPT_SET(process_name_prefix, optarg);
+#			endif
+			case _O_NOTIFY_PARENT:			OPT_SET(server->notify_parent, true);
+
+			case _O_LOG_LEVEL:			OPT_NUMBER("--log-level", log_level, LOG_LEVEL_INFO, LOG_LEVEL_DEBUG, 0);
+			case _O_PERF:				OPT_SET(log_level, LOG_LEVEL_PERF);
+			case _O_VERBOSE:			OPT_SET(log_level, LOG_LEVEL_VERBOSE);
+			case _O_DEBUG:				OPT_SET(log_level, LOG_LEVEL_DEBUG);
+			case _O_FORCE_LOG_COLORS:	OPT_SET(log_colored, true);
+			case _O_NO_LOG_COLORS:		OPT_SET(log_colored, false);
+
+			case _O_HELP:		_help(dev, encoder, server); return 1;
+			case _O_VERSION:	puts(VERSION); return 1;
+			case _O_FEATURES:	_features(); return 1;
+
+			case 0:		break;
+			default:	_help(dev, encoder, server); return -1;
+		}
+	}
+
+#	ifdef WITH_SETPROCTITLE
+	if (process_name_prefix != NULL) {
+		process_set_name_prefix(options->argc, options->argv, process_name_prefix);
+	}
+#	endif
+
+#	undef OPT_CTL_AUTO
+#	undef OPT_CTL_MANUAL
+#	undef OPT_CTL_DEFAULT_NOBREAK
+#	undef OPT_PARSE
+#	undef OPT_RESOLUTION
+#	undef OPT_NUMBER
+#	undef OPT_SET
+	return 0;
+}
+
+static int _parse_resolution(const char *str, unsigned *width, unsigned *height, bool limited) {
+	unsigned tmp_width;
+	unsigned tmp_height;
+
+	if (sscanf(str, "%ux%u", &tmp_width, &tmp_height) != 2) {
+		return -1;
+	}
+	if (limited) {
+		if (tmp_width < VIDEO_MIN_WIDTH || tmp_width > VIDEO_MAX_WIDTH) {
+			return -2;
+		}
+		if (tmp_height < VIDEO_MIN_HEIGHT || tmp_height > VIDEO_MAX_HEIGHT) {
+			return -3;
+		}
+	}
+	*width = tmp_width;
+	*height = tmp_height;
+	return 0;
+}
+
+#ifdef WITH_OMX
+static int _parse_glitched_resolutions(const char *str, struct encoder_t *encoder) {
+	char *str_copy;
+	char *ptr;
+	unsigned count = 0;
+	unsigned width;
+	unsigned height;
+
+	assert((str_copy = strdup(str)) != NULL);
+
+	ptr = strtok(str_copy, ",;:\n\t ");
+	while (ptr != NULL) {
+		if (count >= MAX_GLITCHED_RESOLUTIONS) {
+			printf("Too big '--glitched-resolutions' list: maxlen=%u\n", MAX_GLITCHED_RESOLUTIONS);
+			goto error;
+		}
+
+		switch (_parse_resolution(ptr, &width, &height, true)) {
+			case -1:
+				printf("Invalid resolution format of '%s' in '--glitched-resolutions=%s\n", ptr, str_copy);
+				goto error;
+			case -2:
+				printf("Invalid width of '%s' in '--glitched-resolutions=%s: min=%u, max=%u\n",
+					ptr, str_copy, VIDEO_MIN_WIDTH, VIDEO_MIN_HEIGHT);
+				goto error;
+			case -3:
+				printf("Invalid width of '%s' in '--glitched-resolutions=%s: min=%u, max=%u\n",
+					ptr, str_copy, VIDEO_MIN_WIDTH, VIDEO_MIN_HEIGHT);
+				goto error;
+			case 0: break;
+			default: assert(0 && "Unknown error");
+		}
+
+		encoder->glitched_resolutions[count][0] = width;
+		encoder->glitched_resolutions[count][1] = height;
+		count += 1;
+
+		ptr = strtok(NULL, ",;:\n\t ");
+	}
+
+	encoder->n_glitched_resolutions = count;
+	free(str_copy);
+	return 0;
+
+	error:
+		free(str_copy);
+		return -1;
+}
+#endif
+
+static void _features(void) {
+#	ifdef WITH_OMX
+	puts("+ WITH_OMX");
+#	else
+	puts("- WITH_OMX");
+#	endif
+
+#	ifdef WITH_GPIO
+	puts("+ WITH_GPIO");
+#	else
+	puts("- WITH_GPIO");
+#	endif
+
+#	ifdef WITH_PTHREAD_NP
+	puts("+ WITH_PTHREAD_NP");
+#	else
+	puts("- WITH_PTHREAD_NP");
+#	endif
+
+#	ifdef WITH_SETPROCTITLE
+	puts("+ WITH_SETPROCTITLE");
+#	else
+	puts("- WITH_SETPROCTITLE");
+#	endif
+
+#	ifdef HAS_PDEATHSIG
+	puts("+ HAS_PDEATHSIG");
+#	else
+	puts("- HAS_PDEATHSIG");
+#	endif
+}
+
+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: %s; license: GPLv3\n", VERSION);
+	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("    -r|--resolution <WxH>  ─────────────── Initial image resolution. Default: %ux%u.\n\n", dev->width, dev->height);
+	printf("    -m|--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("    -I|--io-method <method>  ───────────── Set V4L2 IO method (see kernel documentation).\n");
+	printf("                                           Changing of this parameter may increase the performance. Or not.\n");
+	printf("                                           Available: %s; default: MMAP\n\n", IO_METHODS_STR);
+	printf("    -f|--desired-fps <N>  ──────────────── Desired FPS. Default: maximum possible.\n\n");
+	printf("    -z|--min-frame-size <N>  ───────────── Drop frames smaller then this limit. Useful if the device\n");
+	printf("                                           produces small-sized garbage frames. Default: %zu bytes.\n\n", dev->min_frame_size);
+	printf("    -n|--persistent  ───────────────────── Don't re-initialize device on timeout. Default: disabled.\n\n");
+	printf("    -t|--dv-timings  ───────────────────── Enable DV timings querying and events processing\n");
+	printf("                                           to automatic resolution change. 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 independent thread.\n");
+	printf("                                           Default: %u (the number of CPU cores (but not more than 4) + 1).\n\n", dev->n_buffers);
+	printf("    -w|--workers <N>  ──────────────────── The number of worker threads but not more than buffers.\n");
+	printf("                                           Default: %u (the number of CPU cores (but not more than 4)).\n\n", dev->n_workers);
+	printf("    -q|--quality <N>  ──────────────────── Set quality of JPEG encoding from 1 to 100 (best). Default: %u.\n", encoder->quality);
+	printf("                                           Note: If HW encoding is used (JPEG source format selected),\n");
+	printf("                                           this parameter attempts to configure the camera\n");
+	printf("                                           or capture device hardware's internal encoder.\n");
+	printf("                                           It does not re-encode MJPG to MJPG to change the quality level\n");
+	printf("                                           for sources that already output MJPG.\n\n");
+	printf("    -c|--encoder <type>  ───────────────── Use specified encoder. It may affect the number of workers.\n");
+	printf("                                           Available:\n");
+	printf("                                             * CPU  ─ Software MJPG encoding (default);\n");
+#	ifdef WITH_OMX
+	printf("                                             * OMX  ─ GPU hardware accelerated MJPG encoding with OpenMax;\n");
+#	endif
+	printf("                                             * HW  ── Use pre-encoded MJPG frames directly from camera hardware.\n\n");
+#	ifdef WITH_OMX
+	printf("    -g|--glitched-resolutions <WxH,...>  ─ Comma-separated list of resolutions that require forced\n");
+	printf("                                           encoding on CPU instead of OMX. Default: disabled.\n\n");
+#	endif
+	printf("    --device-timeout <sec>  ────────────── Timeout for device querying. Default: %u.\n\n", dev->timeout);
+	printf("    --device-error-delay <sec>  ────────── Delay before trying to connect to the device again\n");
+	printf("                                           after an error (timeout for example). Default: %u.\n\n", dev->error_delay);
+	printf("Image control options:\n");
+	printf("══════════════════════\n");
+	printf("    --image-default  ────────────────────── Reset all image settings bellow to default. Default: no change.\n\n");
+	printf("    --brightness <N|auto|default>  ──────── Set brightness. Default: no change.\n\n");
+	printf("    --contrast <N|default>  ─────────────── Set contrast. Default: no change.\n\n");
+	printf("    --saturation <N|default>  ───────────── Set saturation. Default: no change.\n\n");
+	printf("    --hue <N|auto|default>  ─────────────── Set hue. Default: no change.\n\n");
+	printf("    --gamma <N|default> ─────────────────── Set gamma. Default: no change.\n\n");
+	printf("    --sharpness <N|default>  ────────────── Set sharpness. Default: no change.\n\n");
+	printf("    --backlight-compensation <N|default>  ─ Set backlight compensation. Default: no change.\n\n");
+	printf("    --white-balance <N|auto|default>  ───── Set white balance. Default: no change.\n\n");
+	printf("    --gain <N|auto|default>  ────────────── Set gain. Default: no change.\n\n");
+	printf("    --color-effect <N|default>  ─────────── Set color effect. Default: no change.\n\n");
+	printf("    --flip-vertical <1|0|default>  ──────── Set vertical flip. Default: no change.\n\n");
+	printf("    --flip-horizontal <1|0|default>  ────── Set horizontal flip. Default: no change.\n\n");
+	printf("    Hint: use v4l2-ctl --list-ctrls-menus to query available controls of the device.\n\n");
+	printf("HTTP server options:\n");
+	printf("════════════════════\n");
+	printf("    -s|--host <address>  ──────── Listen on Hostname or IP. Default: %s.\n\n", server->host);
+	printf("    -p|--port <N>  ────────────── Bind to this TCP port. Default: %u.\n\n", server->port);
+	printf("    -U|--unix <path>  ─────────── Bind to UNIX domain socket. Default: disabled.\n\n");
+	printf("    -D|--unix-rm  ─────────────── Try to remove old UNIX socket file before binding. Default: disabled.\n\n");
+	printf("    -M|--unix-mode <mode>  ────── Set UNIX socket file permissions (like 777). Default: disabled.\n\n");
+	printf("    --user <name>  ────────────── HTTP basic auth user. Default: disabled.\n\n");
+	printf("    --passwd <str>  ───────────── HTTP basic auth passwd. Default: empty.\n\n");
+	printf("    --static <path> ───────────── Path to dir with static files instead of embedded root index page.\n");
+	printf("                                  Symlinks are not supported for security reasons. Default: disabled.\n\n");
+	printf("    -k|--blank <path>  ────────── Path to JPEG file that will be shown when the device is disconnected\n");
+	printf("                                  during the streaming. Default: black screen 640x480 with 'NO SIGNAL'.\n\n");
+	printf("    -K|--last-as-blank <sec>  ─── Show the last frame received from the camera after it was disconnected,\n");
+	printf("                                  but no more than specified time (or endlessly if 0 is specified).\n");
+	printf("                                  If the device has not yet been online, display 'NO SIGNAL' or the image\n");
+	printf("                                  specified by option --blank. Default: disabled.\n\n");
+	printf("    -e|--drop-same-frames <N>  ── Don't send identical 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("    -l|--slowdown  ────────────── Slowdown capturing to 1 FPS or less when no stream clients are connected.\n");
+	printf("                                  Useful to reduce CPU consumption. Default: disabled.\n\n");
+	printf("    -R|--fake-resolution <WxH>  ─ Override image resolution for the /state. Default: disabled.\n\n");
+	printf("    --tcp-nodelay  ────────────── Set TCP_NODELAY flag to the client /stream socket. Ignored for --unix.\n");
+	printf("                                  Default: disabled.\n\n");
+	printf("    --allow-origin <str>  ─────── Set Access-Control-Allow-Origin header. Default: disabled.\n\n");
+	printf("    --server-timeout <sec>  ───── Timeout for client connections. Default: %u.\n\n", server->timeout);
+#ifdef WITH_GPIO
+	printf("GPIO options:\n");
+	printf("═════════════\n");
+	printf("    --gpio-device </dev/path>  ───── Path to GPIO character device. Default: %s.\n\n", gpio.path);
+	printf("    --gpio-consumer-prefix <str>  ── Consumer prefix for GPIO outputs. Default: %s.\n\n", gpio.consumer_prefix);
+	printf("    --gpio-prog-running <pin>  ───── Set 1 on GPIO pin while uStreamer is running. Default: disabled.\n\n");
+	printf("    --gpio-stream-online <pin>  ──── Set 1 while streaming. Default: disabled\n\n");
+	printf("    --gpio-has-http-clients <pin>  ─ Set 1 while stream has at least one client. Default: disabled.\n\n");
+#endif
+#if (defined(HAS_PDEATHSIG) || defined(WITH_SETPROCTITLE))
+	printf("Process options:\n");
+	printf("════════════════\n");
+#endif
+#ifdef HAS_PDEATHSIG
+	printf("    --exit-on-parent-death  ─────── Exit the program if the parent process is dead. Default: disabled.\n\n");
+#endif
+#ifdef WITH_SETPROCTITLE
+	printf("    --process-name-prefix <str>  ── Set process name prefix which will be displayed in the process list\n");
+	printf("                                    like '<str>: ustreamer --blah-blah-blah'. Default: disabled.\n\n");
+	printf("    --notify-parent  ────────────── Send SIGUSR2 to the parent process when the stream parameters are changed.\n");
+	printf("                                    Checking changes is performed for the online flag and image resolution.\n\n");
+#endif
+	printf("Logging 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("    --force-log-colors  ─ Force color logging. Default: colored if stdout is a TTY.\n\n");
+	printf("    --no-log-colors  ──── Disable color logging. Default: ditto.\n\n");
+	printf("Help options:\n");
+	printf("═════════════\n");
+	printf("    -h|--help  ─────── Print this text and exit.\n\n");
+	printf("    -v|--version  ──── Print version and exit.\n\n");
+	printf("    --features  ────── Print list of supported features.\n\n");
+}

src/options.h

@@ -0,0 +1,40 @@
+/*****************************************************************************
+#                                                                            #
+#    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 "device.h"
+#include "encoder.h"
+#include "http/server.h"
+
+
+struct options_t {
+	int		argc;
+	char	**argv;
+	char	**argv_copy;
+};
+
+
+struct options_t *options_init(int argc, char *argv[]);
+void options_destroy(struct options_t *options);
+
+int options_parse(struct options_t *options, struct device_t *dev, struct encoder_t *encoder, struct http_server_t *server);

src/picture.c

@@ -0,0 +1,98 @@
+/*****************************************************************************
+#                                                                            #
+#    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 "picture.h"
+
+#include <stdlib.h>
+#include <stdbool.h>
+#include <string.h>
+#include <assert.h>
+
+#include "tools.h"
+#include "logging.h"
+
+
+struct picture_t *picture_init(void) {
+	struct picture_t *picture;
+
+	A_CALLOC(picture, 1);
+	return picture;
+}
+
+void picture_destroy(struct picture_t *picture) {
+	if (picture->data) {
+		free(picture->data);
+	}
+	free(picture);
+}
+
+size_t picture_get_generous_size(unsigned width, unsigned height) {
+	return ((width * height) << 1) * 2;
+}
+
+void picture_realloc_data(struct picture_t *picture, size_t size) {
+	if (picture->allocated < size) {
+		LOG_DEBUG("Increasing picture %p buffer: %zu -> %zu (+%zu)",
+			picture, picture->allocated, size, size - picture->allocated);
+		A_REALLOC(picture->data, size);
+		picture->allocated = size;
+	}
+}
+
+void picture_set_data(struct picture_t *picture, const unsigned char *data, size_t size) {
+	picture_realloc_data(picture, size);
+	memcpy(picture->data, data, size);
+	picture->used = size;
+}
+
+void picture_append_data(struct picture_t *picture, const unsigned char *data, size_t size) {
+	size_t new_used = picture->used + size;
+
+	picture_realloc_data(picture, new_used);
+	memcpy(picture->data + picture->used, data, size);
+	picture->used = new_used;
+}
+
+void picture_copy(const struct picture_t *src, struct picture_t *dest) {
+	picture_set_data(dest, src->data, src->used);
+
+#	define COPY(_field) dest->_field = src->_field
+
+	COPY(used);
+
+	COPY(width);
+	COPY(height);
+
+	COPY(grab_ts);
+	COPY(encode_begin_ts);
+	COPY(encode_end_ts);
+
+#	undef COPY
+}
+
+bool picture_compare(const struct picture_t *a, const struct picture_t *b) {
+	return (
+		a->allocated && b->allocated
+		&& a->used == b->used
+		&& !memcmp(a->data, b->data, b->used)
+	);
+}

src/picture.h

@@ -0,0 +1,51 @@
+/*****************************************************************************
+#                                                                            #
+#    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>
+
+
+struct picture_t {
+	unsigned char	*data;
+	size_t			used;
+	size_t			allocated;
+	unsigned		width;
+	unsigned		height;
+	long double		grab_ts;
+	long double		encode_begin_ts;
+	long double		encode_end_ts;
+};
+
+
+struct picture_t *picture_init(void);
+void picture_destroy(struct picture_t *picture);
+
+size_t picture_get_generous_size(unsigned width, unsigned height);
+
+void picture_realloc_data(struct picture_t *picture, size_t size);
+void picture_set_data(struct picture_t *picture, const unsigned char *data, size_t size);
+void picture_append_data(struct picture_t *picture, const unsigned char *data, size_t size);
+
+void picture_copy(const struct picture_t *src, struct picture_t *dest);
+bool picture_compare(const struct picture_t *a, const struct picture_t *b);

src/process.h

@@ -0,0 +1,139 @@
+/*****************************************************************************
+#                                                                            #
+#    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 <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);
+	}
+}

src/stream.c

@@ -1,4 +1,5 @@
 /*****************************************************************************
+#                                                                            #
 #    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
 #                                                                            #
 #    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
@@ -19,149 +20,180 @@
 *****************************************************************************/
 
 
+#include "stream.h"
+
+#include <stdlib.h>
+#include <stdbool.h>
+#include <stdatomic.h>
+#include <unistd.h>
 #include <errno.h>
-#include <time.h>
 #include <assert.h>
 
 #include <pthread.h>
 
-#include <sys/select.h>
-#include <linux/videodev2.h>
-
 #include "tools.h"
+#include "threading.h"
 #include "logging.h"
-#include "xioctl.h"
+#include "picture.h"
 #include "device.h"
 #include "encoder.h"
-#include "stream.h"
-
-#include "jpeg/encoder.h"
+#ifdef WITH_GPIO
+#	include "gpio/gpio.h"
+#endif
 
 
-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);
+struct _worker_t {
+	pthread_t			tid;
+	unsigned			number;
+	atomic_bool			*proc_stop;
+	atomic_bool			*workers_stop;
 
-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);
+	long double			last_comp_time;
 
-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);
+	pthread_mutex_t		has_job_mutex;
+	unsigned			buf_index;
+	atomic_bool			has_job;
+	bool				job_timely;
+	bool				job_failed;
+	long double			job_start_ts;
+	pthread_cond_t		has_job_cond;
 
-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);
+	pthread_mutex_t		*free_workers_mutex;
+	unsigned			*free_workers;
+	pthread_cond_t		*free_workers_cond;
+
+	struct _worker_t	*order_prev;
+	struct _worker_t	*order_next;
+
+	struct device_t		*dev;
+	struct encoder_t	*encoder;
+};
+
+struct _workers_pool_t {
+	unsigned			n_workers;
+	struct _worker_t	*workers;
+	struct _worker_t	*oldest_worker;
+	struct _worker_t	*latest_worker;
+
+	long double			approx_comp_time;
+
+	pthread_mutex_t		free_workers_mutex;
+	unsigned			free_workers;
+	pthread_cond_t		free_workers_cond;
+
+	atomic_bool			workers_stop;
+
+	long double			desired_frames_interval;
+};
+
+
+static struct _workers_pool_t *_stream_init_loop(struct stream_t *stream);
+static struct _workers_pool_t *_stream_init_one(struct stream_t *stream);
+static void _stream_expose_picture(struct stream_t *stream, unsigned buf_index, unsigned captured_fps);
+
+static struct _workers_pool_t *_workers_pool_init(struct stream_t *stream);
+static void _workers_pool_destroy(struct _workers_pool_t *pool);
+
+static void *_worker_thread(void *v_worker);
+
+static struct _worker_t *_workers_pool_wait(struct _workers_pool_t *pool);
+static void _workers_pool_assign(struct _workers_pool_t *pool, struct _worker_t *ready_worker, unsigned buf_index);
+static long double _workers_pool_get_fluency_delay(struct _workers_pool_t *pool, struct _worker_t *ready_worker);
 
 
 struct stream_t *stream_init(struct device_t *dev, struct encoder_t *encoder) {
+	struct process_t *proc;
 	struct stream_t *stream;
 
+	A_CALLOC(proc, 1);
+	atomic_init(&proc->stop, false);
+	atomic_init(&proc->slowdown, false);
+
 	A_CALLOC(stream, 1);
+	stream->picture = picture_init();
 	stream->dev = dev;
 	stream->encoder = encoder;
-	A_PTHREAD_M_INIT(&stream->mutex);
+	atomic_init(&stream->updated, false);
+	A_MUTEX_INIT(&stream->mutex);
+	stream->proc = proc;
 	return stream;
 }
 
 void stream_destroy(struct stream_t *stream) {
-	A_PTHREAD_M_DESTROY(&stream->mutex);
+	A_MUTEX_DESTROY(&stream->mutex);
+	picture_destroy(stream->picture);
+	free(stream->proc);
 	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;
+	struct _workers_pool_t *pool;
 
 	LOG_INFO("Using V4L2 device: %s", stream->dev->path);
 	LOG_INFO("Using desired FPS: %u", stream->dev->desired_fps);
 
-	while (_stream_init_loop(stream->dev, &pool) == 0) {
-		struct worker_t *oldest_worker = NULL;
-		struct worker_t *last_worker = NULL;
+	while ((pool = _stream_init_loop(stream)) != NULL) {
 		long double grab_after = 0;
 		unsigned fluency_passed = 0;
+		unsigned captured_fps = 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;
+		LOG_DEBUG("Pre-allocating memory for stream picture ...");
+		picture_realloc_data(stream->picture, picture_get_generous_size(stream->dev->run->width, stream->dev->run->height));
+
+		while (!atomic_load(&stream->proc->stop)) {
+			struct _worker_t *ready_worker;
 
 			SEP_DEBUG('-');
+			LOG_DEBUG("Waiting for worker ...");
 
-			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);
+			ready_worker = _workers_pool_wait(pool);
 
-			if (oldest_worker && !oldest_worker->has_job && oldest_worker->ctx.buf_index >= 0) {
-				if (oldest_worker->job_failed) {
-					break;
+			if (!ready_worker->job_failed) {
+				if (ready_worker->job_timely) {
+					_stream_expose_picture(stream, ready_worker->buf_index, captured_fps);
+					LOG_PERF("##### Encoded picture exposed; worker=%u", ready_worker->number);
+				} else {
+					LOG_PERF("----- Encoded picture dropped; worker=%u", ready_worker->number);
 				}
-
-				_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
+			if (atomic_load(&stream->proc->stop)) {
+				break;
+			}
 
-			struct timeval timeout;
-			timeout.tv_sec = stream->dev->timeout;
-			timeout.tv_usec = 0;
+			if (atomic_load(&stream->proc->slowdown)) {
+				usleep(1000000);
+			}
 
-			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);
+			bool has_read;
+			bool has_write;
+			bool has_error;
+			int selected = device_select(stream->dev, &has_read, &has_write, &has_error);
 
-			if (retval < 0) {
+			if (selected < 0) {
 				if (errno != EINTR) {
 					LOG_PERROR("Mainloop select() error");
 					break;
 				}
 
-			} else if (retval == 0) {
+			} else if (selected == 0) {
+#				ifdef WITH_GPIO
+				gpio_set_stream_online(false);
+#				endif
+
 				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");
@@ -171,395 +203,366 @@ void stream_loop(struct stream_t *stream) {
 			} else {
 				persistent_timeout_reported = false;
 
-				if (FD_ISSET(stream->dev->run->fd, &read_fds)) {
+				if (has_read) {
 					LOG_DEBUG("Frame is ready");
 
-					struct v4l2_buffer buf_info;
+#					ifdef WITH_GPIO
+					gpio_set_stream_online(true);
+#					endif
+
+					int buf_index;
 					long double now = get_now_monotonic();
 					long long now_second = floor_ms(now);
 
-					if (_stream_grab_buffer(stream->dev, &buf_info) < 0) {
+					if ((buf_index = device_grab_buffer(stream->dev)) < 0) {
 						break;
 					}
-					stream->dev->run->pictures[buf_info.index].grab_time = now;
 
 					// 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);
+					if (stream->dev->run->hw_buffers[buf_index].used < stream->dev->min_frame_size) {
+						LOG_DEBUG("Dropped too small frame sized %zu bytes, assuming it was broken",
+							stream->dev->run->hw_buffers[buf_index].used);
 						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);
+							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 = captured_fps_accum;
 							captured_fps_accum = 0;
 							captured_fps_second = now_second;
-							LOG_PERF("Oldest worker complete, Captured-FPS = %u", stream->captured_fps);
+							LOG_PERF_FPS("A new second has come; captured_fps=%u", captured_fps);
 						}
 						captured_fps_accum += 1;
 
-						long double fluency_delay = _stream_get_fluency_delay(stream->dev, &pool);
+						long double fluency_delay = _workers_pool_get_fluency_delay(pool, ready_worker);
 
 						grab_after = now + fluency_delay;
-						LOG_VERBOSE("Fluency: delay=%.03Lf; grab_after=%.03Lf", fluency_delay, grab_after);
+						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);
+					_workers_pool_assign(pool, ready_worker, buf_index);
 
 					goto next_handlers; // Поток сам освободит буфер
 
 					pass_frame:
 
-					if (_stream_release_buffer(stream->dev, &buf_info) < 0) {
+					if (device_release_buffer(stream->dev, buf_index) < 0) {
 						break;
 					}
 				}
 
 				next_handlers:
 
-				if (FD_ISSET(stream->dev->run->fd, &write_fds)) {
+				if (has_write) {
 					LOG_ERROR("Got unexpected writing event, seems device was disconnected");
 					break;
 				}
 
-				if (FD_ISSET(stream->dev->run->fd, &error_fds)) {
+				if (has_error) {
 					LOG_INFO("Got V4L2 event");
-					if (_stream_handle_event(stream->dev) < 0) {
+					if (device_consume_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);
-	}
+		A_MUTEX_LOCK(&stream->mutex);
+		stream->online = false;
+		atomic_store(&stream->updated, true);
+		A_MUTEX_UNLOCK(&stream->mutex);
 
-	_stream_destroy_workers(stream->dev, &pool);
-	_stream_control(stream->dev, false);
-	device_close(stream->dev);
+		_workers_pool_destroy(pool);
+		device_switch_capturing(stream->dev, false);
+		device_close(stream->dev);
+
+#		ifdef WITH_GPIO
+		gpio_set_stream_online(false);
+#		endif
+	}
 }
 
 void stream_loop_break(struct stream_t *stream) {
-	stream->dev->stop = 1;
+	atomic_store(&stream->proc->stop, true);
 }
 
-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
+void stream_switch_slowdown(struct stream_t *stream, bool slowdown) {
+	atomic_store(&stream->proc->slowdown, slowdown);
 }
 
-static long double _stream_get_fluency_delay(struct device_t *dev, struct workers_pool_t *pool) {
-	long double sum_comp_time = 0;
-	long double avg_comp_time;
-	long double min_delay;
-	long double soft_delay;
+static struct _workers_pool_t *_stream_init_loop(struct stream_t *stream) {
+	struct _workers_pool_t *pool = NULL;
+	int access_error = 0;
 
-	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) {
-			sum_comp_time += pool->workers[number].last_comp_time;
+	LOG_DEBUG("%s: stream->proc->stop=%d", __FUNCTION__, atomic_load(&stream->proc->stop));
+
+	while (!atomic_load(&stream->proc->stop)) {
+		if (access(stream->dev->path, R_OK|W_OK) < 0) {
+			if (access_error != errno) {
+				SEP_INFO('=');
+				LOG_PERROR("Can't access device");
+				LOG_INFO("Waiting for the device access ...");
+				access_error = errno;
+			}
+			sleep(stream->dev->error_delay);
+			continue;
+		} else {
+			SEP_INFO('=');
+			access_error = 0;
 		}
-		A_PTHREAD_M_UNLOCK(&pool->workers[number].last_comp_time_mutex);
-	}
-	avg_comp_time = sum_comp_time / dev->n_workers; // Среднее время работы воркеров
 
-	min_delay = avg_comp_time / dev->n_workers; // Среднее время работы размазывается на N воркеров
-
-	if (dev->desired_fps > 0 && min_delay > 0) {
-		// Искусственное время задержки на основе желаемого FPS, если включен --desired-fps
-		soft_delay = ((long double) 1) / dev->desired_fps - sum_comp_time;
-		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);
+		if ((pool = _stream_init_one(stream)) == NULL) {
+			LOG_INFO("Sleeping %u seconds before new stream init ...", stream->dev->error_delay);
+			sleep(stream->dev->error_delay);
 		} else {
 			break;
 		}
 	}
-	return retval;
+	return pool;
 }
 
-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) {
+static struct _workers_pool_t *_stream_init_one(struct stream_t *stream) {
+	if (device_open(stream->dev) < 0) {
 		goto error;
 	}
-	if (_stream_control(dev, true) < 0) {
+	if (device_switch_capturing(stream->dev, true) < 0) {
 		goto error;
 	}
 
-	encoder_prepare_live(pool->encoder, dev);
-
-	_stream_init_workers(dev, pool);
-
-	return 0;
+	encoder_prepare(stream->encoder, stream->dev);
+	return _workers_pool_init(stream);
 
 	error:
-		device_close(dev);
-		return -1;
+		device_close(stream->dev);
+		return NULL;
 }
 
-static void _stream_init_workers(struct device_t *dev, struct workers_pool_t *pool) {
-	LOG_INFO("Spawning %d workers ...", dev->n_workers);
+static void _stream_expose_picture(struct stream_t *stream, unsigned buf_index, unsigned captured_fps) {
+	A_MUTEX_LOCK(&stream->mutex);
 
-	*pool->workers_stop = false;
-	A_CALLOC(pool->workers, dev->n_workers);
+	picture_copy(stream->dev->run->pictures[buf_index], stream->picture);
 
-	A_PTHREAD_M_INIT(&pool->free_workers_mutex);
-	A_PTHREAD_C_INIT(&pool->free_workers_cond);
+	stream->online = true;
+	stream->captured_fps = captured_fps;
+	atomic_store(&stream->updated, true);
+
+	A_MUTEX_UNLOCK(&stream->mutex);
+}
+
+static struct _workers_pool_t *_workers_pool_init(struct stream_t *stream) {
+	struct _workers_pool_t *pool;
+
+#	define DEV(_next) stream->dev->_next
+#	define RUN(_next) stream->dev->run->_next
+
+	LOG_INFO("Creating pool with %u workers ...", RUN(n_workers));
+
+	A_CALLOC(pool, 1);
+
+	pool->n_workers = RUN(n_workers);
+	A_CALLOC(pool->workers, pool->n_workers);
+
+	A_MUTEX_INIT(&pool->free_workers_mutex);
+	A_COND_INIT(&pool->free_workers_cond);
+
+	atomic_init(&pool->workers_stop, false);
+
+	if (DEV(desired_fps) > 0 && (DEV(desired_fps) < RUN(hw_fps) || RUN(hw_fps) == 0)) {
+		pool->desired_frames_interval = (long double)1 / DEV(desired_fps);
+	}
+
+#	undef RUN
+#	undef DEV
+
+	for (unsigned number = 0; number < pool->n_workers; ++number) {
+#		define WORKER(_next) pool->workers[number]._next
+
+		A_MUTEX_INIT(&WORKER(has_job_mutex));
+		atomic_init(&WORKER(has_job), false);
+		A_COND_INIT(&WORKER(has_job_cond));
+
+		WORKER(number) = number;
+		WORKER(proc_stop) = &stream->proc->stop;
+		WORKER(workers_stop) = &pool->workers_stop;
+
+		WORKER(free_workers_mutex) = &pool->free_workers_mutex;
+		WORKER(free_workers) = &pool->free_workers;
+		WORKER(free_workers_cond) = &pool->free_workers_cond;
+
+		WORKER(dev) = stream->dev;
+		WORKER(encoder) = stream->encoder;
+
+		A_THREAD_CREATE(&WORKER(tid), _worker_thread, (void *)&(pool->workers[number]));
 
-	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);
+#		undef WORKER
 	}
+	return pool;
 }
 
-static void *_stream_worker_thread(void *v_ctx) {
-	struct worker_context_t *ctx = (struct worker_context_t *)v_ctx;
+static void _workers_pool_destroy(struct _workers_pool_t *pool) {
+	LOG_INFO("Destroying workers pool ...");
 
-	LOG_DEBUG("Hello! I am a worker #%u ^_^", ctx->number);
+	atomic_store(&pool->workers_stop, true);
+	for (unsigned number = 0; number < pool->n_workers; ++number) {
+#		define WORKER(_next) pool->workers[number]._next
 
-	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);
+		A_MUTEX_LOCK(&WORKER(has_job_mutex));
+		atomic_store(&WORKER(has_job), true); // Final job: die
+		A_MUTEX_UNLOCK(&WORKER(has_job_mutex));
+		A_COND_SIGNAL(&WORKER(has_job_cond));
 
-#	define PICTURE(_next) ctx->dev->run->pictures[ctx->buf_index]._next
+		A_THREAD_JOIN(WORKER(tid));
+		A_MUTEX_DESTROY(&WORKER(has_job_mutex));
+		A_COND_DESTROY(&WORKER(has_job_cond));
 
-		if (!*ctx->workers_stop) {
-			LOG_DEBUG("Worker %u compressing JPEG from buffer %d ...", ctx->number, ctx->buf_index);
-
-			PICTURE(encode_begin_time) = get_now_monotonic();
-			if (encoder_compress_buffer(ctx->encoder, ctx->dev, ctx->number, ctx->buf_index) < 0) {
-				*ctx->job_failed = true;
-			}
-			PICTURE(encode_end_time) = get_now_monotonic();
-
-			if (_stream_release_buffer(ctx->dev, &ctx->buf_info) == 0) {
-				*ctx->job_start_time = PICTURE(encode_begin_time);
-				*ctx->has_job = false;
-
-				long double last_comp_time = PICTURE(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",
-					PICTURE(size), last_comp_time, ctx->number, ctx->buf_index
-				);
-			} else {
-				*ctx->job_failed = true;
-				*ctx->has_job = false;
-			}
-		}
-
-#	undef PICTURE
-
-		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);
+#		undef WORKER
 	}
 
-	LOG_DEBUG("Bye-bye (worker %d)", ctx->number);
+	A_MUTEX_DESTROY(&pool->free_workers_mutex);
+	A_COND_DESTROY(&pool->free_workers_cond);
+
+	free(pool->workers);
+	free(pool);
+}
+
+static void *_worker_thread(void *v_worker) {
+	struct _worker_t *worker = (struct _worker_t *)v_worker;
+
+	A_THREAD_RENAME("worker-%u", worker->number);
+	LOG_DEBUG("Hello! I am a worker #%u ^_^", worker->number);
+
+	while (!atomic_load(worker->proc_stop) && !atomic_load(worker->workers_stop)) {
+		LOG_DEBUG("Worker %u waiting for a new job ...", worker->number);
+
+		A_MUTEX_LOCK(&worker->has_job_mutex);
+		A_COND_WAIT_TRUE(atomic_load(&worker->has_job), &worker->has_job_cond, &worker->has_job_mutex);
+		A_MUTEX_UNLOCK(&worker->has_job_mutex);
+
+		if (!atomic_load(worker->workers_stop)) {
+#			define PICTURE(_next) worker->dev->run->pictures[worker->buf_index]->_next
+
+			LOG_DEBUG("Worker %u compressing JPEG from buffer %u ...", worker->number, worker->buf_index);
+
+			worker->job_failed = (bool)encoder_compress_buffer(worker->encoder, worker->dev, worker->number, worker->buf_index);
+
+			if (device_release_buffer(worker->dev, worker->buf_index) == 0) {
+				if (!worker->job_failed) {
+					worker->job_start_ts = PICTURE(encode_begin_ts);
+					worker->last_comp_time = PICTURE(encode_end_ts) - worker->job_start_ts;
+
+					LOG_VERBOSE("Compressed new JPEG: size=%zu, time=%0.3Lf, worker=%u, buffer=%u",
+						PICTURE(used), worker->last_comp_time, worker->number, worker->buf_index);
+				} else {
+					LOG_VERBOSE("Compression failed: worker=%u, buffer=%u", worker->number, worker->buf_index);
+				}
+			} else {
+				worker->job_failed = true;
+			}
+
+			atomic_store(&worker->has_job, false);
+
+#			undef PICTURE
+		}
+
+		A_MUTEX_LOCK(worker->free_workers_mutex);
+		*worker->free_workers += 1;
+		A_MUTEX_UNLOCK(worker->free_workers_mutex);
+		A_COND_SIGNAL(worker->free_workers_cond);
+	}
+
+	LOG_DEBUG("Bye-bye (worker %u)", worker->number);
 	return NULL;
 }
 
-static void _stream_destroy_workers(struct device_t *dev, struct workers_pool_t *pool) {
-	if (pool->workers) {
-		LOG_INFO("Destroying workers ...");
+static struct _worker_t *_workers_pool_wait(struct _workers_pool_t *pool) {
+	struct _worker_t *ready_worker = NULL;
 
-		*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_MUTEX_LOCK(&pool->free_workers_mutex);
+	A_COND_WAIT_TRUE(pool->free_workers, &pool->free_workers_cond, &pool->free_workers_mutex);
+	A_MUTEX_UNLOCK(&pool->free_workers_mutex);
 
-			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;
+	if (pool->oldest_worker && !atomic_load(&pool->oldest_worker->has_job)) {
+		ready_worker = pool->oldest_worker;
+		ready_worker->job_timely = true;
+		pool->oldest_worker = pool->oldest_worker->order_next;
+	} else {
+		for (unsigned number = 0; number < pool->n_workers; ++number) {
+			if (
+				!atomic_load(&pool->workers[number].has_job) && (
+					ready_worker == NULL
+					|| ready_worker->job_start_ts < pool->workers[number].job_start_ts
+				)
+			) {
+				ready_worker = &pool->workers[number];
+				break;
 			}
 		}
-
-		dev->run->capturing = enable;
-		LOG_INFO("Capturing %s", (enable ? "started" : "stopped"));
+		assert(ready_worker != NULL);
+		ready_worker->job_timely = false; // Освободился воркер, получивший задание позже (или самый первый при самом первом захвате)
 	}
-    return 0;
+	return ready_worker;
 }
 
-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;
-		}
+static void _workers_pool_assign(struct _workers_pool_t *pool, struct _worker_t *ready_worker, unsigned buf_index) {
+	if (pool->oldest_worker == NULL) {
+		pool->oldest_worker = ready_worker;
+		pool->latest_worker = pool->oldest_worker;
 	} else {
-		LOG_PERROR("Got some V4L2 device event, but where is it? ");
+		if (ready_worker->order_next) {
+			ready_worker->order_next->order_prev = ready_worker->order_prev;
+		}
+		if (ready_worker->order_prev) {
+			ready_worker->order_prev->order_next = ready_worker->order_next;
+		}
+		ready_worker->order_prev = pool->latest_worker;
+		pool->latest_worker->order_next = ready_worker;
+		pool->latest_worker = ready_worker;
 	}
-	return 0;
+	pool->latest_worker->order_next = NULL;
+
+	A_MUTEX_LOCK(&ready_worker->has_job_mutex);
+	ready_worker->buf_index = buf_index;
+	atomic_store(&ready_worker->has_job, true);
+	A_MUTEX_UNLOCK(&ready_worker->has_job_mutex);
+	A_COND_SIGNAL(&ready_worker->has_job_cond);
+
+	A_MUTEX_LOCK(&pool->free_workers_mutex);
+	pool->free_workers -= 1;
+	A_MUTEX_UNLOCK(&pool->free_workers_mutex);
+
+	LOG_DEBUG("Assigned new frame in buffer %u to worker %u", buf_index, ready_worker->number);
+}
+
+static long double _workers_pool_get_fluency_delay(struct _workers_pool_t *pool, struct _worker_t *ready_worker) {
+	long double approx_comp_time;
+	long double min_delay;
+
+	approx_comp_time = pool->approx_comp_time * 0.9 + ready_worker->last_comp_time * 0.1;
+
+	LOG_VERBOSE("Correcting approx_comp_time: %.3Lf -> %.3Lf (last_comp_time=%.3Lf)",
+		pool->approx_comp_time, approx_comp_time, ready_worker->last_comp_time);
+
+	pool->approx_comp_time = approx_comp_time;
+
+	min_delay = pool->approx_comp_time / pool->n_workers; // Среднее время работы размазывается на N воркеров
+
+	if (pool->desired_frames_interval > 0 && min_delay > 0 && pool->desired_frames_interval > min_delay) {
+		// Искусственное время задержки на основе желаемого FPS, если включен --desired-fps
+		// и аппаратный fps не попадает точно в желаемое значение
+		return pool->desired_frames_interval;
+	}
+	return min_delay;
 }

src/stream.h

@@ -1,4 +1,5 @@
 /*****************************************************************************
+#                                                                            #
 #    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
 #                                                                            #
 #    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
@@ -22,73 +23,28 @@
 #pragma once
 
 #include <stdbool.h>
-#include <signal.h>
+#include <stdatomic.h>
 
 #include <pthread.h>
 
+#include "picture.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 process_t {
+	atomic_bool stop;
+	atomic_bool slowdown;
 };
 
 struct stream_t {
-	struct picture_t	picture;
-	unsigned			width;
-	unsigned			height;
+	struct picture_t	*picture;
+	bool				online;
 	unsigned			captured_fps;
-	bool				updated;
+	atomic_bool			updated;
 	pthread_mutex_t		mutex;
+
+	struct process_t	*proc;
 	struct device_t		*dev;
 	struct encoder_t	*encoder;
 };
@@ -99,3 +55,4 @@ void stream_destroy(struct stream_t *stream);
 
 void stream_loop(struct stream_t *stream);
 void stream_loop_break(struct stream_t *stream);
+void stream_switch_slowdown(struct stream_t *stream, bool slowdown);

src/threading.h

@@ -0,0 +1,125 @@
+/*****************************************************************************
+#                                                                            #
+#    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 <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/tools.h

@@ -1,4 +1,5 @@
 /*****************************************************************************
+#                                                                            #
 #    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
 #                                                                            #
 #    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
@@ -26,48 +27,38 @@
 #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 ARRAY_LEN(_array) (sizeof(_array) / sizeof(_array[0]))
 
 #define INLINE inline __attribute__((always_inline))
 #define UNUSED __attribute__((unused))
 
 
-INLINE char *bool_to_string(const bool flag) {
+INLINE 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()
+	return (long long)now - (now < (long long)now); // floor()
 }
 
 INLINE void get_now(clockid_t clk_id, time_t *sec, long *msec) {
@@ -87,7 +78,13 @@ INLINE long double get_now_monotonic(void) {
 	time_t sec;
 	long msec;
 
+#	if defined(CLOCK_MONOTONIC_RAW)
 	get_now(CLOCK_MONOTONIC_RAW, &sec, &msec);
+#	elif defined(CLOCK_MONOTONIC_FAST)
+	get_now(CLOCK_MONOTONIC_FAST, &sec, &msec);
+#	else
+	get_now(CLOCK_MONOTONIC, &sec, &msec);
+#	endif
 	return (long double)sec + ((long double)msec) / 1000;
 }
 

src/xioctl.h

@@ -1,4 +1,5 @@
 /*****************************************************************************
+#                                                                            #
 #    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
 #                                                                            #
 #    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
@@ -29,10 +30,13 @@
 #include "logging.h"
 
 
-#define XIOCTL_RETRIES 4
+#ifndef CFG_XIOCTL_RETRIES
+#	define CFG_XIOCTL_RETRIES 4
+#endif
+#define XIOCTL_RETRIES ((unsigned)(CFG_XIOCTL_RETRIES))
 
 
-INLINE int xioctl(const int fd, const int request, void *arg) {
+INLINE int xioctl(int fd, int request, void *arg) {
 	int retries = XIOCTL_RETRIES;
 	int retval = -1;
 
@@ -48,8 +52,9 @@ INLINE int xioctl(const int fd, const int request, void *arg) {
 		)
 	);
 
+	// cppcheck-suppress knownConditionTrueFalse
 	if (retval && retries <= 0) {
-		LOG_PERROR("ioctl(%d) retried %d times; giving up", request, XIOCTL_RETRIES);
+		LOG_PERROR("ioctl(%d) retried %u times; giving up", request, XIOCTL_RETRIES);
 	}
 	return retval;
 }

tools/common.py

@@ -0,0 +1,52 @@
+#!/usr/bin/env python3
+# ========================================================================== #
+#                                                                            #
+#    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/>.  #
+#                                                                            #
+# ========================================================================== #
+
+
+import textwrap
+
+
+# =====
+C_PREPEND = textwrap.dedent("""
+        /*****************************************************************************
+        #                                                                            #
+        #    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
+    """).strip() + "\n"

tools/make-html-h.py

@@ -1,5 +1,5 @@
-#!/usr/bin/env python3
-#============================================================================#
+#!/usr/bin/env -S python3 -B
+# ========================================================================== #
 #                                                                            #
 #    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
 #                                                                            #
@@ -18,59 +18,39 @@
 #    You should have received a copy of the GNU General Public License       #
 #    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
 #                                                                            #
-#============================================================================#
+# ========================================================================== #
 
 
 import sys
 import textwrap
 
+import common
+
 
 # =====
-def main():
-    assert len(sys.argv) == 4, "%s <src> <dest> <name>" % (sys.argv[0])
-
-    src = sys.argv[1]
-    dest = sys.argv[2]
+def main() -> None:
+    assert len(sys.argv) == 4, f"{sys.argv[0]} <file.html> <file.h> <name>"
+    html_path = sys.argv[1]
+    header_path = sys.argv[2]
     name = sys.argv[3]
 
-    with open(src, "r") as html_file:
-        text = html_file.read()
+    with open(html_path, "r") as html_file:
+        html = html_file.read()
 
-    text = text.strip()
-    text = text.replace("\"", "\\\"")
-    text = text.replace("%VERSION%", "\" VERSION \"")
-    text = textwrap.indent(text, "\t", (lambda line: True))
-    text = "\n".join(("%s \\" if line.strip() else "%s\\") % (line) for line in text.split("\n"))
-    text = "const char *%s = \" \\\n%s\n\";\n" % (name, text)
-    text = textwrap.dedent("""
-        /*****************************************************************************
-        #    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/>.  #
-        #                                                                            #
-        *****************************************************************************/
+    html = html.strip()
+    html = html.replace("\"", "\\\"")
+    html = html.replace("%VERSION%", "\" VERSION \"")
+    html = textwrap.indent(html, "\t", (lambda line: True))
+    html = "\n".join(
+        (f"{line} \\" if line.strip() else f"{line}\\")
+        for line in html.split("\n")
+    )
 
+    text = f"{common.C_PREPEND}\n#include \"../../config.h\"\n\n\n"
+    text += f"const char HTML_{name}_PAGE[] = \" \\\n{html}\n\";\n"
 
-        #pragma once
-
-        #include "../config.h"
-    """).strip() + "\n\n\n" + text
-
-    with open(dest, "w") as h_file:
-        h_file.write(text)
+    with open(header_path, "w") as header_file:
+        header_file.write(text)
 
 
 # =====

tools/make-jpeg-h.py

@@ -1,5 +1,5 @@
-#!/usr/bin/env python3
-#============================================================================#
+#!/usr/bin/env -S python3 -B
+# ========================================================================== #
 #                                                                            #
 #    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
 #                                                                            #
@@ -18,61 +18,73 @@
 #    You should have received a copy of the GNU General Public License       #
 #    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
 #                                                                            #
-#============================================================================#
+# ========================================================================== #
 
 
 import sys
-import textwrap
+import io
+import struct
+
+from typing import Tuple
+
+import common
 
 
 # =====
-def main():
-    assert len(sys.argv) == 6, "%s <src> <dest> <prefix> <width> <height>" % (sys.argv[0])
+def _get_jpeg_size(data: bytes) -> Tuple[int, int]:
+    # https://sheep.horse/2013/9/finding_the_dimensions_of_a_jpeg_file_in_python.html
 
-    src = sys.argv[1]
-    dest = sys.argv[2]
-    prefix = sys.argv[3]
-    width = int(sys.argv[4])
-    height = int(sys.argv[5])
+    stream = io.BytesIO(data)
+    while True:
+        marker = struct.unpack(">H", stream.read(2))[0]
+        if marker == 0xFFD9:
+            raise RuntimeError("Can't find jpeg size")
 
-    with open(src, "rb") as jpg_file:
-        jpg_data = jpg_file.read()
+        if (
+            marker == 0xFFD8  # Start of image
+            or marker == 0xFF01  # Private marker
+            or 0xFFD0 <= marker <= 0xFFD7  # Restart markers
+        ):
+            continue
 
-    rows = [[]]
-    for ch in jpg_data:
-        if len(rows[-1]) > 20:
-            rows.append([])
-        rows[-1].append(hex(ch))
+        # All other markers specify chunks with lengths
+        length = struct.unpack(">H", stream.read(2))[0]
 
-    text = ",\n\t".join(", ".join(row) for row in rows)
-    text = "const unsigned char %s_JPG_DATA[] = {\n\t%s\n};\n" % (prefix, text)
-    text = "const unsigned long %s_JPG_SIZE = %d;\n\n" % (prefix, len(jpg_data)) + text
-    text = "const unsigned %s_JPG_HEIGHT = %d;\n\n" % (prefix, height) + text
-    text = "const unsigned %s_JPG_WIDTH = %d;\n" % (prefix, width) + text
-    text = textwrap.dedent("""
-        /*****************************************************************************
-        #    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/>.  #
-        #                                                                            #
-        *****************************************************************************/
-    """).strip() + "\n\n\n" + text
+        if marker == 0xFFC0:  # Baseline DCT chunk, has the info we want
+            (_, height, width) = struct.unpack(">BHH", stream.read(5))
+            return (width, height)
 
-    with open(dest, "w") as h_file:
-        h_file.write(text)
+        # Not the chunk we want, skip it
+        stream.seek(length - 2, 1)
+
+
+# =====
+def main() -> None:
+    assert len(sys.argv) == 4, f"{sys.argv[0]} <file.jpeg> <file.h> <name>"
+    jpeg_path = sys.argv[1]
+    header_path = sys.argv[2]
+    name = sys.argv[3]
+
+    with open(jpeg_path, "rb") as jpeg_file:
+        jpeg_data = jpeg_file.read()
+
+    (width, height) = _get_jpeg_size(jpeg_data)
+
+    jpeg_data_text = "{\n\t" + ",\n\t".join(
+        ", ".join(
+            f"0x{ch:02X}"
+            for ch in jpeg_data[index:index + 20]
+        )
+        for index in range(0, len(jpeg_data), 20)
+    ) + ",\n}"
+
+    text = f"{common.C_PREPEND}\n\n"
+    text += f"const unsigned {name}_JPEG_WIDTH = {width};\n"
+    text += f"const unsigned {name}_JPEG_HEIGHT = {height};\n\n"
+    text += f"const unsigned char {name}_JPEG_DATA[] = {jpeg_data_text};\n"
+
+    with open(header_path, "w") as header_file:
+        header_file.write(text)
 
 
 # =====