Bump version: 0.56 → 0.57

.bumpversion.cfg

@@ -1,7 +1,7 @@
 [bumpversion]
 commit = True
 tag = True
-current_version = 0.56
+current_version = 0.57
 parse = (?P<major>\d+)\.(?P<minor>\d+)(\.(?P<patch>\d+)(\-(?P<release>[a-z]+))?)?
 serialize = 
 	{major}.{minor}

Makefile

@@ -7,7 +7,7 @@ CC ?= gcc
 
 # =====
 LIBS = -lm -ljpeg -pthread -levent -levent_pthreads -luuid
-override CFLAGS += -c -std=c99 -Wall -Wextra -D_GNU_SOURCE
+override CFLAGS += -c -std=c11 -Wall -Wextra -D_GNU_SOURCE
 SOURCES = $(shell ls src/*.c src/encoders/cpu/*.c src/encoders/hw/*.c)
 PROG = ustreamer
 

PKGBUILD

@@ -3,7 +3,7 @@
 
 
 pkgname=ustreamer
-pkgver=0.56
+pkgver=0.57
 pkgrel=1
 pkgdesc="Lightweight and fast MJPG-HTTP streamer"
 url="https://github.com/pi-kvm/ustreamer"

README.md

@@ -56,6 +56,8 @@ The recommended way of running µStreamer with [Auvidea B101](https://www.raspbe
 $ ./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
     --drop-same-frames=30 # Save that traffic
 ```

README.ru.md

@@ -56,6 +56,8 @@ $ ./ustreamer --help
 $ ./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
     --drop-same-frames=30 # Экономим трафик
 ```

src/config.h

@@ -22,4 +22,4 @@
 
 #pragma once
 
-#define VERSION "0.56"
+#define VERSION "0.57"

src/encoders/omx/encoder.c

@@ -42,8 +42,8 @@
 #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;
@@ -300,7 +300,7 @@ 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;
 	}
@@ -338,17 +338,17 @@ static int _omx_setup_input(struct omx_encoder_t *omx, struct device_t *dev) {
 		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) {
+	if ((error = OMX_AllocateBuffer(omx->encoder, &omx->input_buffer, _INPUT_PORT, NULL, portdef.nBufferSize)) != OMX_ErrorNone) {
 		LOG_OMX_ERROR(error, "Can't allocate OMX JPEG input buffer");
 		return -1;
 	}
@@ -361,7 +361,7 @@ static int _omx_setup_output(struct omx_encoder_t *omx, unsigned quality) {
 
 	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;
 	}
@@ -374,7 +374,7 @@ static int _omx_setup_output(struct omx_encoder_t *omx, 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;
 	}
@@ -395,7 +395,7 @@ static int _omx_setup_output(struct omx_encoder_t *omx, 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) {
@@ -408,7 +408,7 @@ static int _omx_setup_output(struct omx_encoder_t *omx, 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) {
@@ -417,12 +417,12 @@ static int _omx_setup_output(struct omx_encoder_t *omx, unsigned quality) {
 		}
 	}
 
-	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) {
+	if ((error = OMX_AllocateBuffer(omx->encoder, &omx->output_buffer, _OUTPUT_PORT, NULL, portdef.nBufferSize)) != OMX_ErrorNone) {
 		LOG_OMX_ERROR(error, "Can't allocate OMX JPEG output buffer");
 		return -1;
 	}
@@ -434,23 +434,23 @@ static int _omx_encoder_clear_ports(struct omx_encoder_t *omx) {
 	int retcode = 0;
 
 	if (omx->i_output_port_enabled) {
-		retcode -= component_disable_port(&omx->encoder, OUTPUT_PORT);
+		retcode -= component_disable_port(&omx->encoder, _OUTPUT_PORT);
 		omx->i_output_port_enabled = false;
 	}
 	if (omx->i_input_port_enabled) {
-		retcode -= component_disable_port(&omx->encoder, INPUT_PORT);
+		retcode -= component_disable_port(&omx->encoder, _INPUT_PORT);
 		omx->i_input_port_enabled = false;
 	}
 
 	if (omx->input_buffer) {
-		if ((error = OMX_FreeBuffer(omx->encoder, INPUT_PORT, omx->input_buffer)) != OMX_ErrorNone) {
+		if ((error = OMX_FreeBuffer(omx->encoder, _INPUT_PORT, omx->input_buffer)) != OMX_ErrorNone) {
 			LOG_OMX_ERROR(error, "Can't free OMX JPEG input buffer");
 			// retcode -= 1;
 		}
 		omx->input_buffer = NULL;
 	}
 	if (omx->output_buffer) {
-		if ((error = OMX_FreeBuffer(omx->encoder, OUTPUT_PORT, omx->output_buffer)) != OMX_ErrorNone) {
+		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;
 		}

src/http.c

@@ -22,6 +22,7 @@
 
 #include <stdlib.h>
 #include <stdbool.h>
+#include <stdatomic.h>
 #include <string.h>
 #include <strings.h>
 #include <unistd.h>
@@ -330,11 +331,15 @@ static void _http_callback_snapshot(struct evhttp_request *request, void *v_serv
 	ADD_HEADER("Pragma", "no-cache");
 	ADD_HEADER("Expires", "Mon, 3 Jan 2000 12:34:56 GMT");
 
-#	define ADD_TIME_HEADER(_key, _value) \
-		{ sprintf(header_buf, "%.06Lf", _value); ADD_HEADER(_key, header_buf); }
+#	define ADD_TIME_HEADER(_key, _value) { \
+			sprintf(header_buf, "%.06Lf", _value); \
+			ADD_HEADER(_key, header_buf); \
+		}
 
-#	define ADD_UNSIGNED_HEADER(_key, _value) \
-		{ sprintf(header_buf, "%u", _value); ADD_HEADER(_key, header_buf); }
+#	define ADD_UNSIGNED_HEADER(_key, _value) { \
+			sprintf(header_buf, "%u", _value); \
+			ADD_HEADER(_key, header_buf); \
+		}
 
 	ADD_TIME_HEADER("X-Timestamp", get_now_real());
 
@@ -471,8 +476,8 @@ static void _http_callback_stream_write(struct bufferevent *buf_event, void *v_c
 	// по тем же причинам, по которым у нас нет Content-Length.
 
 #	define ADD_ADVANCE_HEADERS \
-		{ assert(evbuffer_add_printf(buf, \
-		"Content-Type: image/jpeg" RN "X-Timestamp: %.06Lf" RN RN, get_now_real())); }
+		assert(evbuffer_add_printf(buf, \
+			"Content-Type: image/jpeg" RN "X-Timestamp: %.06Lf" RN RN, get_now_real()))
 
 	if (client->need_initial) {
 		assert(evbuffer_add_printf(buf,
@@ -652,10 +657,12 @@ static void _http_exposed_refresh(UNUSED int fd, UNUSED short what, void *v_serv
 	bool stream_updated = false;
 	bool picture_updated = false;
 
-#	define UNLOCK_STREAM \
-		{ server->run->stream->updated = false; A_MUTEX_UNLOCK(&server->run->stream->mutex); }
+#	define UNLOCK_STREAM { \
+			atomic_store(&server->run->stream->updated, false); \
+			A_MUTEX_UNLOCK(&server->run->stream->mutex); \
+		}
 
-	if (server->run->stream->updated) {
+	if (atomic_load(&server->run->stream->updated)) {
 		LOG_DEBUG("Refreshing HTTP exposed ...");
 		A_MUTEX_LOCK(&server->run->stream->mutex);
 		if (server->run->stream->picture.size > 0) { // If online

src/main.c

@@ -41,8 +41,8 @@
 #include "http.h"
 
 
-static const char _short_opts[] = "d:i:x:y:m:a:f:z:tb:w:q:c:s:p:u:ro:e:h";
-static const struct option _long_opts[] = {
+static const char _SHORT_OPTS[] = "d:i:x:y:m:a:f:z:ntb:w:q:c:s:p:u:ro:e:h";
+static const struct option _LONG_OPTS[] = {
 	{"device",					required_argument,	NULL,	'd'},
 	{"input",					required_argument,	NULL,	'i'},
 	{"width",					required_argument,	NULL,	'x'},
@@ -51,14 +51,14 @@ static const struct option _long_opts[] = {
 	{"tv-standard",				required_argument,	NULL,	'a'},
 	{"desired-fps",				required_argument,	NULL,	'f'},
 	{"min-frame-size",			required_argument,	NULL,	'z'},
+	{"persistent",				no_argument,		NULL,	'n'},
 	{"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},
+	{"device-error-delay",		required_argument,	NULL,	1001},
 
 	{"brightness",				required_argument,	NULL,	2000},
 	{"brightness-auto",			no_argument,		NULL,	2001},
@@ -113,30 +113,30 @@ static void _help(struct device_t *dev, struct encoder_t *encoder, struct http_s
 	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: %u.\n\n", dev->width);
-	printf("    -y|--height <N>                  -- Initial image height. Default: %u.\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: %u (number of CPU cores + 1)\n\n", dev->n_buffers);
-	printf("    -w|--workers <N>                 -- The number of compressing threads. Default: %u (== --buffers).\n\n", dev->n_workers);
-	printf("    -q|--quality <N>                 -- Set quality of JPEG encoding from 1 to 100 (best). Default: %u.\n\n", encoder->quality);
-	printf("    -c|--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: %u\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: %u\n\n", dev->error_delay);
+	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: %u.\n\n", dev->width);
+	printf("    -y|--height <N>                -- Initial image height. Default: %u.\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("    -n|--persistent                -- Don't re-initialize device on timeout. Default: disabled.\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: %u (number of CPU cores + 1)\n\n", dev->n_buffers);
+	printf("    -w|--workers <N>               -- The number of compressing threads. Default: %u (== --buffers).\n\n", dev->n_workers);
+	printf("    -q|--quality <N>               -- Set quality of JPEG encoding from 1 to 100 (best). Default: %u.\n\n", encoder->quality);
+	printf("    -c|--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: %u\n\n", dev->timeout);
+	printf("    --device-error-delay <seconds> -- Delay before trying to connect to the device again\n");
+	printf("                                      after timeout. Default: %u\n\n", dev->error_delay);
 	printf("Image control options:\n");
 	printf("---------------\n");
 	printf("    --brightness <N>             -- Set brightness. Default: no change.\n\n");
@@ -232,7 +232,7 @@ static int _parse_options(int argc, char *argv[], struct device_t *dev, struct e
 	int ch;
 
 	log_level = LOG_LEVEL_INFO;
-	while ((ch = getopt_long(argc, argv, _short_opts, _long_opts, &index)) >= 0) {
+	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);
@@ -245,14 +245,14 @@ static int _parse_options(int argc, char *argv[], struct device_t *dev, struct e
 			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 'n':	OPT_SET(dev->persistent, true);
 			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 1001:	OPT_UNSIGNED(dev->error_delay, "--device-error-delay", 1, 60);
 
 			case 2000:	OPT_CTL(brightness);
 			case 2001:	OPT_CTL_AUTO(brightness);

src/stream.c

@@ -20,6 +20,7 @@
 *****************************************************************************/
 
 
+#include <stdatomic.h>
 #include <unistd.h>
 #include <errno.h>
 #include <time.h>
@@ -59,10 +60,13 @@ struct stream_t *stream_init(struct device_t *dev, struct encoder_t *encoder) {
 	struct stream_t *stream;
 
 	A_CALLOC(proc, 1);
+	atomic_init(&proc->stop, false);
+	atomic_init(&proc->slowdown, false);
 
 	A_CALLOC(stream, 1);
 	stream->dev = dev;
 	stream->encoder = encoder;
+	atomic_init(&stream->updated, false);
 	A_MUTEX_INIT(&stream->mutex);
 	stream->proc = proc;
 	return stream;
@@ -76,11 +80,10 @@ void stream_destroy(struct stream_t *stream) {
 
 void stream_loop(struct stream_t *stream) {
 	struct workers_pool_t pool;
-	bool workers_stop;
 
 	MEMSET_ZERO(pool);
+	atomic_init(&pool.workers_stop, false);
 	pool.encoder = stream->encoder;
-	pool.workers_stop = &workers_stop;
 
 	LOG_INFO("Using V4L2 device: %s", stream->dev->path);
 	LOG_INFO("Using desired FPS: %u", stream->dev->desired_fps);
@@ -99,7 +102,7 @@ void stream_loop(struct stream_t *stream) {
 
 		LOG_INFO("Capturing ...");
 
-		while (!stream->proc->stop) {
+		while (!atomic_load(&stream->proc->stop)) {
 			int free_worker_number = -1;
 
 			SEP_DEBUG('-');
@@ -109,7 +112,7 @@ void stream_loop(struct stream_t *stream) {
 			A_COND_WAIT_TRUE(pool.free_workers, &pool.free_workers_cond, &pool.free_workers_mutex);
 			A_MUTEX_UNLOCK(&pool.free_workers_mutex);
 
-			if (oldest_worker && !oldest_worker->has_job && oldest_worker->buf_index >= 0) {
+			if (oldest_worker && !atomic_load(&oldest_worker->has_job) && oldest_worker->buf_index >= 0) {
 				if (oldest_worker->job_failed) {
 					break;
 				}
@@ -123,7 +126,7 @@ void stream_loop(struct stream_t *stream) {
 			} else {
 				for (unsigned number = 0; number < stream->dev->n_workers; ++number) {
 					if (
-						!pool.workers[number].has_job && (
+						!atomic_load(&pool.workers[number].has_job) && (
 							free_worker_number == -1
 							|| pool.workers[free_worker_number].job_start_time < pool.workers[number].job_start_time
 						)
@@ -134,16 +137,16 @@ void stream_loop(struct stream_t *stream) {
 				}
 
 				assert(free_worker_number >= 0);
-				assert(!pool.workers[free_worker_number].has_job);
+				assert(!atomic_load(&pool.workers[free_worker_number].has_job));
 
 				LOG_PERF("----- Raw frame dropped;  worker = %u", free_worker_number);
 			}
 
-			if (stream->proc->stop) {
+			if (atomic_load(&stream->proc->stop)) {
 				break;
 			}
 
-			if (stream->proc->slowdown) {
+			if (atomic_load(&stream->proc->slowdown)) {
 				usleep(1000000);
 			}
 
@@ -252,7 +255,7 @@ void stream_loop(struct stream_t *stream) {
 
 					A_MUTEX_LOCK(&FREE_WORKER(has_job_mutex));
 					FREE_WORKER(buf_index) = buf_info.index;
-					FREE_WORKER(has_job) = true;
+					atomic_store(&FREE_WORKER(has_job), true);
 					A_MUTEX_UNLOCK(&FREE_WORKER(has_job_mutex));
 					A_COND_SIGNAL(&FREE_WORKER(has_job_cond));
 
@@ -292,7 +295,7 @@ void stream_loop(struct stream_t *stream) {
 		free(stream->picture.data);
 		stream->width = 0;
 		stream->height = 0;
-		stream->updated = true;
+		atomic_store(&stream->updated, true);
 		A_MUTEX_UNLOCK(&stream->mutex);
 	}
 
@@ -302,11 +305,11 @@ void stream_loop(struct stream_t *stream) {
 }
 
 void stream_loop_break(struct stream_t *stream) {
-	stream->proc->stop = 1;
+	atomic_store(&stream->proc->stop, true);
 }
 
 void stream_switch_slowdown(struct stream_t *stream, bool slowdown) {
-	stream->proc->slowdown = slowdown;
+	atomic_store(&stream->proc->slowdown, slowdown);
 }
 
 static void _stream_expose_picture(struct stream_t *stream, unsigned buf_index) {
@@ -325,7 +328,7 @@ static void _stream_expose_picture(struct stream_t *stream, unsigned buf_index)
 
 	stream->width = stream->dev->run->width;
 	stream->height = stream->dev->run->height;
-	stream->updated = true;
+	atomic_store(&stream->updated, true);
 
 	A_MUTEX_UNLOCK(&stream->mutex);
 
@@ -365,8 +368,8 @@ static long double _stream_get_fluency_delay(struct device_t *dev, struct worker
 static int _stream_init_loop(struct stream_t *stream, struct workers_pool_t *pool) {
 	int retval = -1;
 
-	LOG_DEBUG("%s: *stream->proc->stop = %d", __FUNCTION__, stream->proc->stop);
-	while (!stream->proc->stop) {
+	LOG_DEBUG("%s: stream->proc->stop = %d", __FUNCTION__, atomic_load(&stream->proc->stop));
+	while (!atomic_load(&stream->proc->stop)) {
 		if ((retval = _stream_init(stream, pool)) < 0) {
 			LOG_INFO("Sleeping %u seconds before new stream init ...", stream->dev->error_delay);
 			sleep(stream->dev->error_delay);
@@ -405,7 +408,7 @@ static int _stream_init(struct stream_t *stream, struct workers_pool_t *pool) {
 static void _stream_init_workers(struct stream_t *stream, struct workers_pool_t *pool) {
 	LOG_INFO("Spawning %u workers ...", stream->dev->n_workers);
 
-	*pool->workers_stop = false;
+	atomic_store(&pool->workers_stop, false);
 	A_CALLOC(pool->workers, stream->dev->n_workers);
 
 	A_MUTEX_INIT(&pool->free_workers_mutex);
@@ -417,11 +420,12 @@ static void _stream_init_workers(struct stream_t *stream, struct workers_pool_t
 		pool->free_workers += 1;
 
 		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)		= (sig_atomic_t *volatile)&(stream->proc->stop);
-		WORKER(workers_stop)	= pool->workers_stop;
+		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;
@@ -441,13 +445,13 @@ static void *_stream_worker_thread(void *v_worker) {
 
 	LOG_DEBUG("Hello! I am a worker #%u ^_^", worker->number);
 
-	while (!*worker->proc_stop && !*worker->workers_stop) {
+	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(worker->has_job, &worker->has_job_cond, &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 (!*worker->workers_stop) {
+		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);
@@ -460,7 +464,7 @@ static void *_stream_worker_thread(void *v_worker) {
 
 			if (_stream_release_buffer(worker->dev, &worker->buf_info) == 0) {
 				worker->job_start_time = PICTURE(encode_begin_time);
-				worker->has_job = false;
+				atomic_store(&worker->has_job, false);
 
 				long double last_comp_time = PICTURE(encode_end_time) - worker->job_start_time;
 
@@ -472,7 +476,7 @@ static void *_stream_worker_thread(void *v_worker) {
 					PICTURE(size), last_comp_time, worker->number, worker->buf_index);
 			} else {
 				worker->job_failed = true;
-				worker->has_job = false;
+				atomic_store(&worker->has_job, false);
 			}
 
 #			undef PICTURE
@@ -492,12 +496,12 @@ static void _stream_destroy_workers(struct stream_t *stream, struct workers_pool
 	if (pool->workers) {
 		LOG_INFO("Destroying workers ...");
 
-		*pool->workers_stop = true;
+		atomic_store(&pool->workers_stop, true);
 		for (unsigned number = 0; number < stream->dev->n_workers; ++number) {
 #			define WORKER(_next) pool->workers[number]._next
 
 			A_MUTEX_LOCK(&WORKER(has_job_mutex));
-			WORKER(has_job) = true; // Final job: die
+			atomic_store(&WORKER(has_job), true); // Final job: die
 			A_MUTEX_UNLOCK(&WORKER(has_job_mutex));
 			A_COND_SIGNAL(&WORKER(has_job_cond));
 

src/stream.h

@@ -23,7 +23,7 @@
 #pragma once
 
 #include <stdbool.h>
-#include <signal.h>
+#include <stdatomic.h>
 
 #include <pthread.h>
 
@@ -34,8 +34,8 @@
 struct worker_t {
 	pthread_t			tid;
 	unsigned			number;
-	sig_atomic_t		*volatile proc_stop;
-	bool				*workers_stop;
+	atomic_bool			*proc_stop;
+	atomic_bool			*workers_stop;
 
 	pthread_mutex_t		last_comp_time_mutex;
 	long double			last_comp_time;
@@ -43,7 +43,7 @@ struct worker_t {
 	pthread_mutex_t		has_job_mutex;
 	int					buf_index;
 	struct v4l2_buffer	buf_info;
-	bool				has_job;
+	atomic_bool			has_job;
 	bool				job_failed;
 	long double			job_start_time;
 	pthread_cond_t		has_job_cond;
@@ -61,7 +61,7 @@ struct worker_t {
 
 struct workers_pool_t {
 	struct worker_t		*workers;
-	bool				*workers_stop;
+	atomic_bool			workers_stop;
 
 	pthread_mutex_t		free_workers_mutex;
 	unsigned			free_workers;
@@ -71,8 +71,8 @@ struct workers_pool_t {
 };
 
 struct process_t {
-	sig_atomic_t volatile	stop;
-	bool					slowdown;
+	atomic_bool stop;
+	atomic_bool slowdown;
 };
 
 struct stream_t {
@@ -80,7 +80,7 @@ struct stream_t {
 	unsigned			width;
 	unsigned			height;
 	unsigned			captured_fps;
-	bool				updated;
+	atomic_bool			updated;
 	pthread_mutex_t		mutex;
 
 	struct process_t	*proc;