Bump version: 0.68 → 0.69

.bumpversion.cfg

@@ -1,7 +1,7 @@
 [bumpversion]
 commit = True
 tag = True
-current_version = 0.64
+current_version = 0.69
 parse = (?P<major>\d+)\.(?P<minor>\d+)(\.(?P<patch>\d+)(\-(?P<release>[a-z]+))?)?
 serialize = 
 	{major}.{minor}
@@ -14,3 +14,7 @@ replace = VERSION "{new_version}"
 search = pkgver={current_version}
 replace = pkgver={new_version}
 
+[bumpversion:file:pkg/openwrt/Makefile]
+search = PKG_VERSION:={current_version}
+replace = PKG_VERSION:={new_version}
+

Makefile

@@ -50,7 +50,7 @@ release:
 
 
 bump:
-	bumpversion minor
+	bumpversion $(if $(V), $(V), minor)
 
 
 push:

README.md

@@ -11,7 +11,7 @@
 | 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>2</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 |
 | 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 |

README.ru.md

@@ -10,8 +10,8 @@
 |----------|---------------|-------------------|
 | 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>2</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/uapi/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 |

pkg/arch/PKGBUILD

@@ -3,7 +3,7 @@
 
 
 pkgname=ustreamer
-pkgver=0.64
+pkgver=0.69
 pkgrel=1
 pkgdesc="Lightweight and fast MJPG-HTTP streamer"
 url="https://github.com/pi-kvm/ustreamer"
@@ -19,7 +19,7 @@ md5sums=(SKIP)
 build() {
 	cd $srcdir
 	rm -rf $pkgname-build
-	cp -r ustreamer-$pkgver $pkgname-build
+	cp -r $pkgname-$pkgver $pkgname-build
 	cd $pkgname-build
 	make CFLAGS="$CFLAGS" LDFLAGS="$LDFLAGS" $MAKEFLAGS
 }

pkg/gentoo/ustreamer-9999.ebuild

@@ -5,7 +5,7 @@ EAPI=7
  
 inherit git-r3
  
-DESCRIPTION="µStreamer - Lightweight and fast MJPG-HTTP streamer"
+DESCRIPTION="uStreamer - Lightweight and fast MJPG-HTTP streamer"
 HOMEPAGE="https://github.com/pi-kvm/ustreamer"
 EGIT_REPO_URI="https://github.com/pi-kvm/ustreamer.git"
  

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 $(TOPDIR)/rules.mk
+
+PKG_NAME:=ustreamer
+PKG_VERSION:=0.69
+PKG_RELEASE:=1
+PKG_MAINTAINER:=Maxim Devaev <mdevaev@gmail.com>
+
+PKG_SOURCE_PROTO:=git
+PKG_SOURCE_URL:=https://github.com/pi-kvm/ustreamer.git
+PKG_SOURCE_VERSION:=v$(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 +libevent2 +libevent2-core +libevent2-extra +libevent2-pthreads
+  URL:=https://github.com/pi-kvm/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 +1,20 @@
+
+config ustreamer
+	option enabled '0'
+
+	option device '/dev/video0'
+	option device_timeout '5'
+	option input '0'
+
+	option width '640'
+	option height '480'
+	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 +1,55 @@
+#!/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="$options --width='`getcfg width 640`'"
+	options="$options --height='`getcfg height 480`'"
+	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

@@ -22,4 +22,4 @@
 
 #pragma once
 
-#define VERSION "0.64"
+#define VERSION "0.69"

src/device.c

@@ -27,6 +27,7 @@
 #include <strings.h>
 #include <unistd.h>
 #include <fcntl.h>
+#include <errno.h>
 #include <assert.h>
 
 #include <sys/mman.h>
@@ -432,7 +433,11 @@ static void _device_open_hw_fps(struct device_t *dev) {
 
 	LOG_DEBUG("Calling ioctl(VIDIOC_G_PARM) ...");
 	if (xioctl(dev->run->fd, VIDIOC_G_PARM, &setfps) < 0) {
-		LOG_PERROR("Unable to query HW FPS changing");
+		if (errno == ENOTTY) { // Quiet message for Auvidea B101
+			LOG_INFO("Quierying HW FPS changing is not supported");
+		} else {
+			LOG_PERROR("Unable to query HW FPS changing");
+		}
 		return;
 	}
 
@@ -454,7 +459,7 @@ static void _device_open_hw_fps(struct device_t *dev) {
 	}
 
 	if (dev->desired_fps != SETFPS_TPF(denominator)) {
-		LOG_INFO("Using HW FPS (coerced): %u -> %u", dev->desired_fps, SETFPS_TPF(denominator));
+		LOG_INFO("Using HW FPS: %u -> %u (coerced)", dev->desired_fps, SETFPS_TPF(denominator));
 	} else {
 		LOG_INFO("Using HW FPS: %u", dev->desired_fps);
 	}

src/http/blank.c

@@ -0,0 +1,173 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
+#                                                                            #
+#    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#include <stdio.h>
+#include <stdbool.h>
+#include <string.h>
+#include <setjmp.h>
+
+#include <jpeglib.h>
+
+#include "../tools.h"
+#include "../logging.h"
+
+#include "data/blank_jpeg.h"
+
+#include "blank.h"
+
+
+struct _jpeg_error_manager_t {
+	struct jpeg_error_mgr	mgr; // Default manager
+	jmp_buf					jmp;
+};
+
+
+static struct blank_t *_blank_init_internal();
+static struct blank_t *_blank_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 blank_t *blank_init(const char *path) {
+	struct blank_t *blank = NULL;
+
+	if (path) {
+		blank = _blank_init_external(path);
+	}
+
+	if (blank) {
+		LOG_INFO("Using external blank placeholder: %s", path);
+	} else {
+		blank = _blank_init_internal();
+		LOG_INFO("Using internal blank placeholder");
+	}
+	return blank;
+}
+
+void blank_destroy(struct blank_t *blank) {
+	free(blank->picture.data);
+	free(blank);
+}
+
+static struct blank_t *_blank_init_internal() {
+	struct blank_t *blank;
+
+	A_CALLOC(blank, 1);
+
+	A_CALLOC(blank->picture.data, ARRAY_LEN(BLANK_JPEG_DATA));
+	memcpy(blank->picture.data, BLANK_JPEG_DATA, ARRAY_LEN(BLANK_JPEG_DATA));
+
+	blank->picture.used = ARRAY_LEN(BLANK_JPEG_DATA);
+	blank->picture.allocated = ARRAY_LEN(BLANK_JPEG_DATA);
+
+	blank->width = BLANK_JPEG_WIDTH;
+	blank->height = BLANK_JPEG_HEIGHT;
+
+	return blank;
+}
+
+static struct blank_t *_blank_init_external(const char *path) {
+	FILE *fp = NULL;
+	struct blank_t *blank;
+
+	A_CALLOC(blank, 1);
+
+	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 (100 * 1024)
+	while (true) {
+		if (blank->picture.used + CHUNK_SIZE >= blank->picture.allocated) {
+			blank->picture.allocated = blank->picture.used + CHUNK_SIZE * 2;
+			A_REALLOC(blank->picture.data, blank->picture.allocated);
+		}
+
+		size_t readed = fread(blank->picture.data + blank->picture.used, 1, CHUNK_SIZE, fp);
+		blank->picture.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:
+		free(blank->picture.data);
+		free(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);
+
+	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

@@ -21,3 +21,18 @@
 
 
 #pragma once
+
+#include <stdlib.h>
+
+#include "../device.h"
+
+
+struct blank_t {
+	struct picture_t	picture;
+	unsigned			width;
+	unsigned			height;
+};
+
+
+struct blank_t *blank_init(const char *path);
+void blank_destroy(struct blank_t *blank);

src/http/server.c

@@ -52,13 +52,13 @@
 #include "../encoder.h"
 #include "../stream.h"
 
+#include "blank.h"
 #include "base64.h"
 #include "mime.h"
 #include "static.h"
 #include "server.h"
 
 #include "data/index_html.h"
-#include "data/blank_jpeg.h"
 
 
 static bool _http_get_param_true(struct evkeyvalq *params, const char *key);
@@ -103,8 +103,6 @@ struct http_server_t *http_server_init(struct stream_t *stream) {
 	server->timeout = 10;
 	server->run = run;
 
-	_expose_blank_picture(server);
-
 	assert(!evthread_use_pthreads());
 	assert((run->base = event_base_new()));
 	assert((run->http = evhttp_new(run->base)));
@@ -137,6 +135,10 @@ void http_server_destroy(struct http_server_t *server) {
 		free(server->run->auth_token);
 	}
 
+	if (server->run->blank) {
+		blank_destroy(server->run->blank);
+	}
+
 	free(server->run->exposed->picture.data);
 	free(server->run->exposed);
 	free(server->run);
@@ -155,6 +157,10 @@ int http_server_listen(struct http_server_t *server) {
 		assert(!evhttp_set_cb(server->run->http, "/stream", _http_callback_stream, (void *)server));
 	}
 
+	server->run->drop_same_frames_blank = max_u(server->drop_same_frames, server->run->drop_same_frames_blank);
+	server->run->blank = blank_init(server->blank_path);
+	_expose_blank_picture(server);
+
 	{
 		struct timeval refresh_interval;
 
@@ -169,8 +175,6 @@ int http_server_listen(struct http_server_t *server) {
 		assert(!event_add(server->run->refresh, &refresh_interval));
 	}
 
-	server->run->drop_same_frames_blank = max_u(server->drop_same_frames, server->run->drop_same_frames_blank);
-
 	if (server->slowdown) {
 		stream_switch_slowdown(server->run->stream, true);
 	}
@@ -523,7 +527,7 @@ static void _http_callback_stream(struct evhttp_request *request, void *v_server
 	PREPROCESS_REQUEST;
 
 	conn = evhttp_request_get_connection(request);
-	if (conn != NULL) {
+	if (conn) {
 		A_CALLOC(client, 1);
 		client->server = server;
 		client->request = request;
@@ -641,8 +645,9 @@ static void _http_callback_stream_write(struct bufferevent *buf_event, void *v_c
 			"Content-Length: %zu" RN
 			"X-Timestamp: %.06Lf" RN
 			"%s",
-			EXPOSED(picture.used) * sizeof(*EXPOSED(picture.data)),
-			get_now_real(), (client->extra_headers ? "" : RN)
+			EXPOSED(picture.used),
+			get_now_real(),
+			(client->extra_headers ? "" : RN)
 		));
 		if (client->extra_headers) {
 			assert(evbuffer_add_printf(buf,
@@ -675,10 +680,7 @@ static void _http_callback_stream_write(struct bufferevent *buf_event, void *v_c
 		}
 	}
 
-	assert(!evbuffer_add(buf,
-		(void *)EXPOSED(picture.data),
-		EXPOSED(picture.used) * sizeof(*EXPOSED(picture.data))
-	));
+	assert(!evbuffer_add(buf, (void *)EXPOSED(picture.data), EXPOSED(picture.used)));
 	assert(evbuffer_add_printf(buf, RN "--" BOUNDARY RN));
 
 	if (client->advance_headers) {
@@ -711,12 +713,12 @@ static void _http_callback_stream_error(UNUSED struct bufferevent *buf_event, UN
 	}
 
 	conn = evhttp_request_get_connection(client->request);
-	if (conn != NULL) {
+	if (conn) {
 		evhttp_connection_get_peer(conn, &client_addr, &client_port);
 	}
 	LOG_INFO("HTTP: Disconnected the stream client: [%s]:%u; clients now: %u",
 		client_addr, client_port, RUN(stream_clients_count));
-	if (conn != NULL) {
+	if (conn) {
 		evhttp_connection_free(conn);
 	}
 
@@ -744,7 +746,7 @@ static void _http_queue_send_stream(struct http_server_t *server, bool stream_up
 
 	for (struct stream_client_t *client = server->run->stream_clients; client != NULL; client = client->next) {
 		conn = evhttp_request_get_connection(client->request);
-		if (conn != NULL) {
+		if (conn) {
 			// Фикс для бага WebKit. При включенной опции дропа одинаковых фреймов,
 			// WebKit отрисовывает последний фрейм в серии с некоторой задержкой,
 			// и нужно послать два фрейма, чтобы серия была вовремя завершена.
@@ -824,8 +826,7 @@ static bool _expose_new_picture(struct http_server_t *server) {
 	EXPOSED(expose_begin_time) = get_now_monotonic();
 
 #	define MEM_STREAM_TO_EXPOSED \
-		EXPOSED(picture.data), STREAM(picture.data), \
-		STREAM(picture.used) * sizeof(*STREAM(picture.data))
+		EXPOSED(picture.data), STREAM(picture.data), STREAM(picture.used)
 
 	if (server->drop_same_frames) {
 		if (
@@ -878,28 +879,28 @@ static bool _expose_new_picture(struct http_server_t *server) {
 }
 
 static bool _expose_blank_picture(struct http_server_t *server) {
+#	define BLANK(_next)		server->run->blank->_next
 #	define EXPOSED(_next)	server->run->exposed->_next
-#	define BLANK_JPEG_LEN	ARRAY_LEN(BLANK_JPEG_DATA)
 
 	EXPOSED(expose_begin_time) = get_now_monotonic();
 	EXPOSED(expose_cmp_time) = EXPOSED(expose_begin_time);
 
 	if (EXPOSED(online) || EXPOSED(picture.used) == 0) {
-		if (EXPOSED(picture.allocated) < BLANK_JPEG_LEN) {
-			A_REALLOC(EXPOSED(picture.data), BLANK_JPEG_LEN);
-			EXPOSED(picture.allocated) = BLANK_JPEG_LEN;
+		if (EXPOSED(picture.allocated) < BLANK(picture.used)) {
+			A_REALLOC(EXPOSED(picture.data), BLANK(picture.used));
+			EXPOSED(picture.allocated) = BLANK(picture.used);
 		}
 
-		memcpy(EXPOSED(picture.data), BLANK_JPEG_DATA, BLANK_JPEG_LEN * sizeof(*EXPOSED(picture.data)));
+		memcpy(EXPOSED(picture.data), BLANK(picture.data), BLANK(picture.used));
 
-		EXPOSED(picture.used) = BLANK_JPEG_LEN;
+		EXPOSED(picture.used) = BLANK(picture.used);
 
 		EXPOSED(picture.grab_time) = 0;
 		EXPOSED(picture.encode_begin_time) = 0;
 		EXPOSED(picture.encode_end_time) = 0;
 
-		EXPOSED(width) = BLANK_JPEG_WIDTH;
-		EXPOSED(height) = BLANK_JPEG_HEIGHT;
+		EXPOSED(width) = BLANK(width);
+		EXPOSED(height) = BLANK(height);
 		EXPOSED(captured_fps) = 0;
 		EXPOSED(online) = false;
 		goto updated;
@@ -917,6 +918,6 @@ static bool _expose_blank_picture(struct http_server_t *server) {
 		EXPOSED(expose_end_time) = get_now_monotonic();
 		return true; // Updated
 
-#	undef BLANK_JPEG_LEN
 #	undef EXPOSED
+#	undef BLANK
 }

src/http/server.h

@@ -33,6 +33,8 @@
 #include "../tools.h"
 #include "../stream.h"
 
+#include "blank.h"
+
 
 struct stream_client_t {
 	struct http_server_t	*server;
@@ -78,6 +80,7 @@ struct http_server_runtime_t {
 	struct exposed_t		*exposed;
 	struct stream_client_t	*stream_clients;
 	unsigned				stream_clients_count;
+	struct blank_t			*blank;
 	unsigned				drop_same_frames_blank;
 };
 
@@ -87,14 +90,17 @@ struct http_server_t {
 	char		*unix_path;
 	bool		unix_rm;
 	mode_t		unix_mode;
+	unsigned	timeout;
+
 	char		*user;
 	char		*passwd;
 	char		*static_path;
+
+	char		*blank_path;
 	unsigned	drop_same_frames;
 	bool		slowdown;
 	unsigned	fake_width;
 	unsigned	fake_height;
-	unsigned	timeout;
 
 	struct http_server_runtime_t *run;
 };

src/main.c

@@ -41,7 +41,7 @@
 #include "http/server.h"
 
 
-static const char _SHORT_OPTS[] = "d:i:x:y:m:a:f:z:ntb:w:q:c:s:p:u:ro:e:lhv";
+static const char _SHORT_OPTS[] = "d:i:x:y:m:a:f:z:ntb:w:q:c:s:p:u:ro:k:e:lhv";
 static const struct option _LONG_OPTS[] = {
 	{"device",					required_argument,	NULL,	'd'},
 	{"input",					required_argument,	NULL,	'i'},
@@ -82,6 +82,7 @@ static const struct option _LONG_OPTS[] = {
 	{"user",					required_argument,	NULL,	3000},
 	{"passwd",					required_argument,	NULL,	3001},
 	{"static",					required_argument,	NULL,	3002},
+	{"blank",					required_argument,	NULL,	'k'},
 	{"drop-same-frames",		required_argument,	NULL,	'e'},
 	{"slowdown",				no_argument,		NULL,	'l'},
 	{"fake-width",				required_argument,	NULL,	3003},
@@ -166,12 +167,14 @@ static void _help(struct device_t *dev, struct encoder_t *encoder, struct http_s
 	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("    -e|--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("    -l|--slowdown  ────────────── Slowdown capturing to 1 FPS or less when no stream clients connected.\n");
-	printf("                                  Useful to reduce CPU cosumption. Default: disabled.\n\n");
+	printf("                                  Useful to reduce CPU consumption. 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: %u.\n\n", server->timeout);
@@ -284,6 +287,7 @@ static int _parse_options(int argc, char *argv[], struct device_t *dev, struct e
 			case 3000:	OPT_SET(server->user, optarg);
 			case 3001:	OPT_SET(server->passwd, optarg);
 			case 3002:	OPT_SET(server->static_path, optarg);
+			case 'k':	OPT_SET(server->blank_path, optarg);
 			case 'e':	OPT_UNSIGNED(server->drop_same_frames, "--drop-same-frames", 0, 30);
 			case 'l':	OPT_SET(server->slowdown, true);
 			case 3003:	OPT_UNSIGNED(server->fake_width, "--fake-width", 0, 1920);

src/stream.c

@@ -232,7 +232,7 @@ void stream_loop(struct stream_t *stream) {
 
 					LOG_DEBUG("Grabbed a new frame to buffer %u", buf_index);
 
-					if (!oldest_worker) {
+					if (oldest_worker == NULL) {
 						oldest_worker = &pool.workers[free_worker_number];
 						last_worker = oldest_worker;
 					} else {
@@ -315,7 +315,7 @@ static void _stream_expose_picture(struct stream_t *stream, unsigned buf_index)
 	stream->picture.used = PICTURE(used);
 	stream->picture.allocated = PICTURE(allocated);
 
-	memcpy(stream->picture.data, PICTURE(data), stream->picture.used * sizeof(*stream->picture.data));
+	memcpy(stream->picture.data, PICTURE(data), stream->picture.used);
 
 	stream->picture.grab_time = PICTURE(grab_time);
 	stream->picture.encode_begin_time = PICTURE(encode_begin_time);
@@ -376,12 +376,12 @@ static int _stream_init_loop(struct stream_t *stream, struct workers_pool_t *poo
 }
 
 static int _stream_init(struct stream_t *stream, struct workers_pool_t *pool) {
-	SEP_INFO('=');
-
 	_stream_destroy_workers(stream, pool);
 	device_switch_capturing(stream->dev, false);
 	device_close(stream->dev);
 
+	SEP_INFO('=');
+
 	if (device_open(stream->dev) < 0) {
 		goto error;
 	}

tools/common.py

@@ -0,0 +1,53 @@
+#!/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
+
+
+# =====
+def get_prepend() -> str:
+    return 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

@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env -S python3 -B
 #============================================================================#
 #                                                                            #
 #    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
@@ -22,12 +22,13 @@
 
 
 import sys
-import os
 import textwrap
 
+import common
+
 
 # =====
-def main():
+def main() -> None:
     assert len(sys.argv) == 4, "%s <file.html> <file.h> <name>" % (sys.argv[0])
     html_path = sys.argv[1]
     header_path = sys.argv[2]
@@ -36,9 +37,6 @@ def main():
     with open(html_path, "r") as html_file:
         text = html_file.read()
 
-    with open(os.path.join(os.path.dirname(os.path.realpath(__file__)), "prepend.h")) as prepend_file:
-        prepend = prepend_file.read()
-
     text = text.strip()
     text = text.replace("\"", "\\\"")
     text = text.replace("%VERSION%", "\" VERSION \"")
@@ -48,7 +46,7 @@ def main():
         for line in text.split("\n")
     )
     text = "const char HTML_%s_PAGE[] = \" \\\n%s\n\";\n" % (name, text)
-    text = prepend + "\n#include \"../../config.h\"\n\n\n" + text
+    text = common.get_prepend() + "\n#include \"../../config.h\"\n\n\n" + text
 
     with open(header_path, "w") as header_file:
         header_file.write(text)

tools/make-jpeg-h.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env -S python3 -B
 #============================================================================#
 #                                                                            #
 #    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
@@ -22,13 +22,17 @@
 
 
 import sys
-import os
 import io
 import struct
 
+from typing import Tuple
+from typing import List
+
+import common
+
 
 # =====
-def _get_jpeg_size(data):
+def _get_jpeg_size(data: bytes) -> Tuple[int, int]:
     # https://sheep.horse/2013/9/finding_the_dimensions_of_a_jpeg_file_in_python.html
 
     stream = io.BytesIO(data)
@@ -55,7 +59,7 @@ def _get_jpeg_size(data):
 
 
 # =====
-def main():
+def main() -> None:
     assert len(sys.argv) == 4, "%s <file.jpeg> <file.h> <name>" % (sys.argv[0])
     jpeg_path = sys.argv[1]
     header_path = sys.argv[2]
@@ -66,10 +70,7 @@ def main():
 
     (width, height) = _get_jpeg_size(jpeg_data)
 
-    with open(os.path.join(os.path.dirname(os.path.realpath(__file__)), "prepend.h")) as prepend_file:
-        prepend = prepend_file.read()
-
-    rows = [[]]
+    rows: List[List[str]] = [[]]
     for ch in jpeg_data:
         if len(rows[-1]) > 20:
             rows.append([])
@@ -79,7 +80,7 @@ def main():
     text = "const unsigned char %s_JPEG_DATA[] = {\n\t%s\n};\n" % (name, text)
     text = "const unsigned %s_JPEG_HEIGHT = %d;\n\n" % (name, height) + text
     text = "const unsigned %s_JPEG_WIDTH = %d;\n" % (name, width) + text
-    text = prepend + "\n\n" + text
+    text = common.get_prepend() + "\n\n" + text
 
     with open(header_path, "w") as header_file:
         header_file.write(text)