Bump version: 0.40 → 0.41

.bumpversion.cfg

@@ -1,7 +1,7 @@
 [bumpversion]
 commit = True
 tag = True
-current_version = 0.35
+current_version = 0.41
 parse = (?P<major>\d+)\.(?P<minor>\d+)(\.(?P<patch>\d+)(\-(?P<release>[a-z]+))?)?
 serialize = 
 	{major}.{minor}

PKGBUILD

@@ -3,7 +3,7 @@
 
 
 pkgname=ustreamer
-pkgver=0.35
+pkgver=0.41
 pkgrel=1
 pkgdesc="Lightweight and fast MJPG-HTTP streamer"
 url="https://github.com/pi-kvm/ustreamer"

README.md

@@ -58,7 +58,7 @@ The recommended way of running µStreamer with [Auvidea B101](https://www.raspbe
 $ ./ustreamer \
     --format=uyvy \ # Device input format
     --encoder=omx \ # Hardware encoding with OpenMAX
-    --dv-timings \ # use DV-timings
+    --dv-timings \ # Use DV-timings
     --quality=20 \ # OpenMAX has a non-linear quality scale
     --drop-same-frames=30 # Save that traffic
 ```

src/config.h

@@ -21,4 +21,4 @@
 
 #pragma once
 
-#define VERSION "0.35"
+#define VERSION "0.41"

src/data/index.html

@@ -11,7 +11,7 @@
 	<hr>
 	<ul>
 		<li>
-			<a href="/ping"><b><samp>/ping</samp></b></a><br>
+			<a href="/state"><b><samp>/state</samp></b></a><br>
 			Get JSON structure with state of the server.
 		</li>
 		<br>
@@ -25,6 +25,12 @@
 			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>).
@@ -40,7 +46,7 @@
 					<b><samp>dual_final_frames=1</samp></b><br>
 					Enable workaround for Safari/WebKit bug when using option <samp>--drop-same-frames</samp>.<br>
 					Without this option, when the frame series is completed, WebKit-based browsers<br>
-					renders the last one with a delay.
+					renders the last frame with a delay.
 				</li>
 			</ul>
 		</li>

src/data/index_html.h

@@ -38,7 +38,7 @@ const char *HTML_INDEX_PAGE = " \
 		<hr> \
 		<ul> \
 			<li> \
-				<a href=\"/ping\"><b><samp>/ping</samp></b></a><br> \
+				<a href=\"/state\"><b><samp>/state</samp></b></a><br> \
 				Get JSON structure with state of the server. \
 			</li> \
 			<br> \
@@ -52,6 +52,12 @@ const char *HTML_INDEX_PAGE = " \
 				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>). \
@@ -67,7 +73,7 @@ const char *HTML_INDEX_PAGE = " \
 						<b><samp>dual_final_frames=1</samp></b><br> \
 						Enable workaround for Safari/WebKit bug when using option <samp>--drop-same-frames</samp>.<br> \
 						Without this option, when the frame series is completed, WebKit-based browsers<br> \
-						renders the last one with a delay. \
+						renders the last frame with a delay. \
 					</li> \
 				</ul> \
 			</li> \

src/device.c

@@ -84,7 +84,6 @@ struct device_t *device_init() {
 	dev->standard = V4L2_STD_UNKNOWN;
 	dev->n_buffers = max_u(sysconf(_SC_NPROCESSORS_ONLN), 1) + 1;
 	dev->n_workers = dev->n_buffers;
-	dev->soft_fps = 30;
 	dev->timeout = 1;
 	dev->error_delay = 1;
 	dev->run = run;

src/device.h

@@ -72,8 +72,7 @@ struct device_t {
 	bool			dv_timings;
 	unsigned		n_buffers;
 	unsigned		n_workers;
-	unsigned		soft_fps;
-	unsigned		every_frame;
+	unsigned		desired_fps;
 	unsigned		min_frame_size;
 	bool			persistent;
 	unsigned		timeout;

src/encoder.c

@@ -129,7 +129,7 @@ void encoder_prepare_live(struct encoder_t *encoder, struct device_t *dev) {
 #	ifdef OMX_ENCODER
 	if (encoder->type == ENCODER_TYPE_OMX) {
 		for (unsigned index = 0; index < encoder->n_omxs; ++index) {
-			if (omx_encoder_prepare_live(encoder->omxs[index], dev, encoder->quality, encoder->omx_use_ijg) < 0) {
+			if (omx_encoder_prepare_live(encoder->omxs[index], dev, encoder->quality) < 0) {
 				goto use_fallback;
 			}
 		}
@@ -154,8 +154,6 @@ int encoder_compress_buffer(struct encoder_t *encoder, struct device_t *dev,
 
 	assert(encoder->type != ENCODER_TYPE_UNKNOWN);
 
-	dev->run->pictures[buf_index].encode_begin_time = get_now_monotonic();
-
 	if (encoder->type == ENCODER_TYPE_CPU) {
 		jpeg_encoder_compress_buffer(dev, buf_index, encoder->quality);
 	}
@@ -167,8 +165,6 @@ int encoder_compress_buffer(struct encoder_t *encoder, struct device_t *dev,
 	}
 #	endif
 
-	dev->run->pictures[buf_index].encode_end_time = get_now_monotonic();
-
 	return 0;
 
 #	pragma GCC diagnostic ignored "-Wunused-label"

src/encoder.h

@@ -48,7 +48,6 @@ struct encoder_t {
 	enum encoder_type_t		type;
 	unsigned				quality;
 #ifdef OMX_ENCODER
-	bool					omx_use_ijg;
 	unsigned				n_omxs;
 	struct omx_encoder_t	**omxs;
 #endif

src/http.c

@@ -51,7 +51,7 @@ static bool _http_get_param_true(struct evkeyvalq *params, const char *key);
 static char *_http_get_param_uri(struct evkeyvalq *params, const char *key);
 
 static void _http_callback_root(struct evhttp_request *request, void *arg);
-static void _http_callback_ping(struct evhttp_request *request, void *v_server);
+static void _http_callback_state(struct evhttp_request *request, void *v_server);
 static void _http_callback_snapshot(struct evhttp_request *request, void *v_server);
 
 static void _http_callback_stream(struct evhttp_request *request, void *v_server);
@@ -91,7 +91,7 @@ struct http_server_t *http_server_init(struct stream_t *stream) {
 	evhttp_set_allowed_methods(run->http, EVHTTP_REQ_GET|EVHTTP_REQ_HEAD);
 
 	assert(!evhttp_set_cb(run->http, "/", _http_callback_root, NULL));
-	assert(!evhttp_set_cb(run->http, "/ping", _http_callback_ping, (void *)server));
+	assert(!evhttp_set_cb(run->http, "/state", _http_callback_state, (void *)server));
 	assert(!evhttp_set_cb(run->http, "/snapshot", _http_callback_snapshot, (void *)server));
 	assert(!evhttp_set_cb(run->http, "/stream", _http_callback_stream, (void *)server));
 
@@ -118,7 +118,11 @@ int http_server_listen(struct http_server_t *server) {
 	struct timeval refresh_interval;
 
 	refresh_interval.tv_sec = 0;
-	refresh_interval.tv_usec = 1000000 / (server->run->stream->dev->soft_fps * 2);
+	if (server->run->stream->dev->desired_fps > 0) {
+		refresh_interval.tv_usec = 1000000 / (server->run->stream->dev->desired_fps * 2);
+	} else {
+		refresh_interval.tv_usec = 16000; // ~60fps
+	}
 	assert((server->run->refresh = event_new(server->run->base, -1, EV_PERSIST, _http_exposed_refresh, server)));
 	assert(!event_add(server->run->refresh, &refresh_interval));
 
@@ -189,7 +193,7 @@ static void _http_callback_root(struct evhttp_request *request, UNUSED void *arg
 	evbuffer_free(buf);
 }
 
-static void _http_callback_ping(struct evhttp_request *request, void *v_server) {
+static void _http_callback_state(struct evhttp_request *request, void *v_server) {
 	struct http_server_t *server = (struct http_server_t *)v_server;
 	struct evbuffer *buf;
 
@@ -197,29 +201,31 @@ static void _http_callback_ping(struct evhttp_request *request, void *v_server)
 
 	assert((buf = evbuffer_new()));
 	assert(evbuffer_add_printf(buf,
-		"{\"source\": {\"resolution\": {\"width\": %u, \"height\": %u},"
-		" \"online\": %s, \"quality\": %u, \"soft_fps\": %u, \"captured_fps\": %u},"
-		" \"stream\": {\"queued_fps\": %u,  \"clients\": %u, \"clients_stat\": {",
+		"{\"ok\": true, \"result\":"
+		" {\"source\": {\"resolution\": {\"width\": %u, \"height\": %u},"
+		" \"online\": %s, \"quality\": %u, \"desired_fps\": %u, \"captured_fps\": %u},"
+		" \"stream\": {\"queued_fps\": %u, \"clients\": %u, \"clients_stat\": {",
 		(server->fake_width ? server->fake_width : server->run->exposed->width),
 		(server->fake_height ? server->fake_height : server->run->exposed->height),
 		bool_to_string(server->run->exposed->online),
 		server->run->stream->encoder->quality,
-		server->run->stream->dev->soft_fps,
+		server->run->stream->dev->desired_fps,
 		server->run->exposed->captured_fps,
 		server->run->exposed->queued_fps,
 		server->run->stream_clients_count
 	));
 	for (struct stream_client_t * client = server->run->stream_clients; client != NULL; client = client->next) {
 		assert(evbuffer_add_printf(buf,
-			"\"%s\": {\"fps\": %u, \"advance_headers\": %s, \"dual_final_frames\": %s}%s",
+			"\"%s\": {\"fps\": %u, \"extra_headers\": %s, \"advance_headers\": %s, \"dual_final_frames\": %s}%s",
 			client->id,
 			client->fps,
+			bool_to_string(client->extra_headers),
 			bool_to_string(client->advance_headers),
 			bool_to_string(client->dual_final_frames),
 			(client->next ? ", " : "")
 		));
 	}
-	assert(evbuffer_add_printf(buf, "}}}"));
+	assert(evbuffer_add_printf(buf, "}}}}"));
 
 	ADD_HEADER("Content-Type", "application/json");
 	evhttp_send_reply(request, HTTP_OK, "OK", buf);
@@ -392,7 +398,7 @@ static void _http_callback_stream_write(struct bufferevent *buf_event, void *v_c
 			"Cache-Control: no-store, no-cache, must-revalidate, pre-check=0, post-check=0, max-age=0" RN
 			"Pragma: no-cache" RN
 			"Expires: Mon, 3 Jan 2000 12:34:56 GMT" RN
-			"Set-Cookie: stream_client_key=%s; stream_client_id=%s; path=/; max-age=30" RN
+			"Set-Cookie: stream_client=%s/%s; path=/; max-age=30" RN
 			"Content-Type: multipart/x-mixed-replace;boundary=" BOUNDARY RN
 			RN
 			"--" BOUNDARY RN,

src/main.c

@@ -40,25 +40,21 @@
 #include "http.h"
 
 
-static const char _short_opts[] = "d:i:x:y:f:a:e:z:tn:w:q:c:s:p:r:h";
+static const char _short_opts[] = "d:i:x:y:f:a:z:tn:w:q:c:s:p:r:h";
 static const struct option _long_opts[] = {
 	{"device",					required_argument,	NULL,	'd'},
 	{"input",					required_argument,	NULL,	'i'},
 	{"width",					required_argument,	NULL,	'x'},
 	{"height",					required_argument,	NULL,	'y'},
-	{"format",					required_argument,	NULL,	'f'},
+	{"format",					required_argument,	NULL,	'm'},
 	{"tv-standard",				required_argument,	NULL,	'a'},
-	{"soft-fps",				required_argument,	NULL,	'm'},
-	{"every-frame",				required_argument,	NULL,	'e'},
+	{"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'},
-#	ifdef OMX_ENCODER
-	{"encoder-omx-use-ijg",		required_argument,	NULL,	500},
-#	endif
 	{"device-timeout",			required_argument,	NULL,	1000},
 	{"device-persistent",		no_argument,		NULL,	1001},
 	{"device-error-delay",		required_argument,	NULL,	1002},
@@ -102,12 +98,11 @@ static void _help(struct device_t *dev, struct encoder_t *encoder, struct http_s
 	printf("    -i|--input <N>                   -- Input channel. Default: %u.\n\n", dev->input);
 	printf("    -x|--width <N>                   -- Initial image width. Default: %d.\n\n", dev->width);
 	printf("    -y|--height <N>                  -- Initial image height. Default: %d.\n\n", dev->height);
-	printf("    -f|--format <fmt>                -- Image format.\n");
+	printf("    -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("    -m|--soft-fps <N>                -- Soft FPS limit; default: %u.\n\n", dev->soft_fps);
-	printf("    -e|--every-frame <N>             -- Drop all input frames except specified. Default: disabled.\n\n");
+	printf("    -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");
@@ -119,10 +114,6 @@ static void _help(struct device_t *dev, struct encoder_t *encoder, struct http_s
 	printf("    -q|--quality <N>                 -- Set quality of JPEG encoding from 1 to 100 (best). Default: %d.\n\n", encoder->quality);
 	printf("    --encoder <type>                 -- Use specified encoder. It may affects to workers number.\n");
 	printf("                                     -- Available: %s; default: CPU.\n\n", ENCODER_TYPES_STR);
-#	ifdef OMX_ENCODER
-	printf("    --encoder-omx-use-ijg            -- Use the standard IJG quality tables when encoding images using OMX.\n");
-	printf("                                        Default: disabled.\n\n");
-#	endif
 	printf("    --device-timeout <seconds>       -- Timeout for device querying. Default: %d\n\n", dev->timeout);
 	printf("    --device-persistent              -- Don't re-initialize device on timeout. Default: disabled.\n\n");
 	printf("    --device-error-delay <seconds>   -- Delay before trying to connect to the device again\n");
@@ -135,8 +126,8 @@ static void _help(struct device_t *dev, struct encoder_t *encoder, struct http_s
 	printf("                                  It can significantly reduce the outgoing traffic, but will increase\n");
 	printf("                                  the CPU loading. Don't use this option with analog signal sources\n");
 	printf("                                  or webcams, it's useless. Default: disabled.\n\n");
-	printf("    --fake-width <N>           -- Override image width for /ping. Default: disabled\n\n");
-	printf("    --fake-height <N>          -- Override image height for /ping. Default: disabled.\n\n");
+	printf("    --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");
@@ -177,20 +168,16 @@ static int _parse_options(int argc, char *argv[], struct device_t *dev, struct e
 			case 'y':	OPT_UNSIGNED(dev->height, "--height", 180, 1200);
 #			pragma GCC diagnostic ignored "-Wsign-compare"
 #			pragma GCC diagnostic push
-			case 'f':	OPT_PARSE(dev->format, device_parse_format, FORMAT_UNKNOWN, "pixel format");
+			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 'm':	OPT_UNSIGNED(dev->soft_fps, "--soft-fps", 1, 30);
-			case 'e':	OPT_UNSIGNED(dev->every_frame, "--every-frame", 1, 30);
+			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");
-#			ifdef OMX_ENCODER
-			case 500:	OPT_SET(encoder->omx_use_ijg, true);
-#			endif
 			case 1000:	OPT_UNSIGNED(dev->timeout, "--device-timeout", 1, 60);
 			case 1001:	OPT_SET(dev->persistent, true);
 			case 1002:	OPT_UNSIGNED(dev->error_delay, "--device-error-delay", 1, 60);

src/omx/encoder.c

@@ -51,7 +51,7 @@ static int _i_omx = 0;
 static int _omx_init_component(struct omx_encoder_t *omx);
 static int _omx_init_disable_ports(struct omx_encoder_t *omx);
 static int _omx_setup_input(struct omx_encoder_t *omx, struct device_t *dev);
-static int _omx_setup_output(struct omx_encoder_t *omx, const unsigned quality, const bool use_ijg);
+static int _omx_setup_output(struct omx_encoder_t *omx, const unsigned quality);
 static int _omx_encoder_clear_ports(struct omx_encoder_t *omx);
 
 static OMX_ERRORTYPE _omx_event_handler(UNUSED OMX_HANDLETYPE encoder,
@@ -148,7 +148,7 @@ 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, const bool use_ijg) {
+int omx_encoder_prepare_live(struct omx_encoder_t *omx, struct device_t *dev, const unsigned quality) {
 	if (component_set_state(&omx->encoder, OMX_StateIdle) < 0) {
 		return -1;
 	}
@@ -158,7 +158,7 @@ int omx_encoder_prepare_live(struct omx_encoder_t *omx, struct device_t *dev, co
 	if (_omx_setup_input(omx, dev) < 0) {
 		return -1;
 	}
-	if (_omx_setup_output(omx, quality, use_ijg) < 0) {
+	if (_omx_setup_output(omx, quality) < 0) {
 		return -1;
 	}
 	if (component_set_state(&omx->encoder, OMX_StateExecuting) < 0) {
@@ -329,7 +329,7 @@ static int _omx_setup_input(struct omx_encoder_t *omx, struct device_t *dev) {
 	return 0;
 }
 
-static int _omx_setup_output(struct omx_encoder_t *omx, const unsigned quality, const bool use_ijg) {
+static int _omx_setup_output(struct omx_encoder_t *omx, const unsigned quality) {
 	OMX_ERRORTYPE error;
 	OMX_PARAM_PORTDEFINITIONTYPE portdef;
 
@@ -365,7 +365,7 @@ static int _omx_setup_output(struct omx_encoder_t *omx, const unsigned quality,
 		}
 	}
 
-	if (use_ijg) {
+	{
 		OMX_PARAM_IJGSCALINGTYPE ijg;
 
 		OMX_INIT_STRUCTURE(ijg);

src/omx/encoder.h

@@ -51,5 +51,5 @@ struct omx_encoder_t {
 struct omx_encoder_t *omx_encoder_init();
 void omx_encoder_destroy(struct omx_encoder_t *omx);
 
-int omx_encoder_prepare_live(struct omx_encoder_t *omx, struct device_t *dev, const unsigned quality, const bool use_ijg);
+int omx_encoder_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);

src/stream.c

@@ -78,11 +78,11 @@ void stream_loop(struct stream_t *stream) {
 	pool.workers_stop = &workers_stop;
 
 	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;
-		unsigned frames_count = 0;
 		long double grab_after = 0;
 		unsigned fluency_passed = 0;
 		unsigned captured_fps_accum = 0;
@@ -183,15 +183,6 @@ void stream_loop(struct stream_t *stream) {
 					}
 					stream->dev->run->pictures[buf_info.index].grab_time = now;
 
-					if (stream->dev->every_frame) {
-						if (frames_count < stream->dev->every_frame - 1) {
-							frames_count += 1;
-							LOG_DEBUG("Dropping frame %d for option --every-frame=%d", frames_count, stream->dev->every_frame);
-							goto pass_frame;
-						}
-						frames_count = 0;
-					}
-
 					// Workaround for broken, corrupted frames:
 					// Under low light conditions corrupted frames may get captured.
 					// The good thing is such frames are quite small compared to the regular pictures.
@@ -321,25 +312,28 @@ static void _stream_expose_picture(struct stream_t *stream, unsigned buf_index)
 }
 
 static long double _stream_get_fluency_delay(struct device_t *dev, struct workers_pool_t *pool) {
-	long double comp_time = 0;
+	long double sum_comp_time = 0;
+	long double avg_comp_time;
 	long double min_delay;
 	long double soft_delay;
 
 	for (unsigned number = 0; number < dev->n_workers; ++number) {
 		A_PTHREAD_M_LOCK(&pool->workers[number].last_comp_time_mutex);
 		if (pool->workers[number].last_comp_time > 0) {
-			comp_time += pool->workers[number].last_comp_time;
+			sum_comp_time += pool->workers[number].last_comp_time;
 		}
 		A_PTHREAD_M_UNLOCK(&pool->workers[number].last_comp_time_mutex);
 	}
-	comp_time = comp_time / dev->n_workers; // Среднее время работы воркеров
+	avg_comp_time = sum_comp_time / dev->n_workers; // Среднее время работы воркеров
 
-	min_delay = comp_time / dev->n_workers; // Минимальное время работы размазывается на N воркеров
-	soft_delay = ((long double)1) / dev->soft_fps; // Искусственное время задержки на основе желаемого FPS
+	min_delay = avg_comp_time / dev->n_workers; // Среднее время работы размазывается на N воркеров
 
-	if (min_delay > 0) {
+	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;
 }
 
@@ -437,18 +431,22 @@ static void *_stream_worker_thread(void *v_ctx) {
 		A_PTHREAD_C_WAIT_TRUE(*ctx->has_job, ctx->has_job_cond, ctx->has_job_mutex);
 		A_PTHREAD_M_UNLOCK(ctx->has_job_mutex);
 
+#	define PICTURE(_next) ctx->dev->run->pictures[ctx->buf_index]._next
+
 		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 = ctx->dev->run->pictures[ctx->buf_index].encode_begin_time;
+				*ctx->job_start_time = PICTURE(encode_begin_time);
 				*ctx->has_job = false;
 
-				long double last_comp_time = ctx->dev->run->pictures[ctx->buf_index].encode_end_time - *ctx->job_start_time;
+				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;
@@ -456,7 +454,7 @@ static void *_stream_worker_thread(void *v_ctx) {
 
 				LOG_VERBOSE(
 					"Compressed JPEG size=%ld; time=%0.3Lf; worker=%u; buffer=%d",
-					ctx->dev->run->pictures[ctx->buf_index].size, last_comp_time, ctx->number, ctx->buf_index
+					PICTURE(size), last_comp_time, ctx->number, ctx->buf_index
 				);
 			} else {
 				*ctx->job_failed = true;
@@ -464,6 +462,8 @@ static void *_stream_worker_thread(void *v_ctx) {
 			}
 		}
 
+#	undef PICTURE
+
 		A_PTHREAD_M_LOCK(ctx->free_workers_mutex);
 		*ctx->free_workers += 1;
 		A_PTHREAD_M_UNLOCK(ctx->free_workers_mutex);