Bump version: 5.58 → 5.59

(cherry picked from commit f3bfdb2fd74c0bb5249df3f21ab6daf0ec12318a)
Signed-off-by: Maxim Devaev <mdevaev@gmail.com>

.bumpversion.cfg

@@ -1,7 +1,7 @@
 [bumpversion]
 commit = True
 tag = True
-current_version = 5.49
+current_version = 5.59
 parse = (?P<major>\d+)\.(?P<minor>\d+)
 serialize = 
 	{major}.{minor}

.github/workflows/docker-alpine-image.yaml

@@ -66,7 +66,7 @@ jobs:
         uses: docker/build-push-action@v3
         with:
           context: .
-          platforms: linux/arm64,linux/amd64,linux/arm/v7
+          platforms: linux/arm64,linux/amd64,linux/arm/v6,linux/arm/v7
           file: pkg/docker/Dockerfile.alpine
       -
         name: Push

.gitignore

@@ -7,7 +7,7 @@
 /python/ustreamer.egg-info/
 /janus/build/
 /ustreamer
-/ustreamer-dump
+/ustreamer-*
 /config.mk
 vgcore.*
 *.sock

Makefile

@@ -36,8 +36,9 @@ endif
 
 apps:
 	$(MAKE) -C src
-	$(ECHO) ln -sf src/ustreamer.bin ustreamer
-	$(ECHO) ln -sf src/ustreamer-dump.bin ustreamer-dump
+	for i in src/*.bin; do \
+		test ! -x $$i || ln -sf $$i `basename $$i .bin`; \
+	done
 
 
 python:
@@ -70,9 +71,8 @@ install-strip: install
 
 
 regen:
-	tools/$(MAKE)-jpeg-h.py src/ustreamer/data/blank.jpeg src/ustreamer/data/blank_jpeg.c BLANK
-	tools/$(MAKE)-ico-h.py src/ustreamer/data/favicon.ico src/ustreamer/data/favicon_ico.c FAVICON
-	tools/$(MAKE)-html-h.py src/ustreamer/data/index.html src/ustreamer/data/index_html.c INDEX
+	tools/make-ico-h.py src/ustreamer/data/favicon.ico src/ustreamer/data/favicon_ico.c FAVICON
+	tools/make-html-h.py src/ustreamer/data/index.html src/ustreamer/data/index_html.c INDEX
 
 
 release:
@@ -119,7 +119,7 @@ clean-all: linters clean
 
 clean:
 	rm -rf pkg/arch/pkg pkg/arch/src pkg/arch/v*.tar.gz pkg/arch/ustreamer-*.pkg.tar.{xz,zst}
-	rm -f ustreamer ustreamer-dump *.so
+	rm -f ustreamer ustreamer-* *.so
 	$(MAKE) -C src clean
 	$(MAKE) -C python clean
 	$(MAKE) -C janus clean

README.md

@@ -85,13 +85,13 @@ Without arguments, ```ustreamer``` will try to open ```/dev/video0``` with 640x4
 
 :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:
+The recommended way of running µStreamer with [TC358743-based capture device](https://www.raspberrypi.org/forums/viewtopic.php?f=38&t=120702&start=400#p1339178) on Raspberry Pi:
 ```
 $ ./ustreamer \
     --format=uyvy \ # Device input format
     --encoder=m2m-image \ # Hardware encoding on V4L2 M2M driver
     --workers=3 \ # Workers number
-    --persistent \ # Don't re-initialize device on timeout (for example when HDMI cable was disconnected)
+    --persistent \ # Suppress repetitive signal source errors (for example when HDMI cable was disconnected)
     --dv-timings \ # Use DV-timings
     --drop-same-frames=30 # Save the traffic
 ```
@@ -151,7 +151,7 @@ Add `-e EDID=1` to set HDMI EDID before starting ustreamer. Use together with `-
 -----
 # Raspberry Pi Camera Example
 
-Example usage for the Raspberry Pi v3 camera (required `libcamerify` which is located in `libcamera-tools` on Raspbian):
+Example usage for the Raspberry Pi v3 camera (required `libcamerify` which is located in `libcamera-tools` and `libcamera-v4l2` (install both) on Raspbian):
 ```
 $ sudo modprobe bcm2835-v4l2
 $ libcamerify ./ustreamer --host :: --encoder=m2m-image

janus/src/audio.c

@@ -51,6 +51,9 @@ typedef struct {
 } _enc_buffer_s;
 
 
+static _pcm_buffer_s *_pcm_buffer_init(void);
+static _enc_buffer_s *_enc_buffer_init(void);
+
 static void *_pcm_thread(void *v_audio);
 static void *_encoder_thread(void *v_audio);
 
@@ -72,8 +75,8 @@ us_audio_s *us_audio_init(const char *name, unsigned pcm_hz) {
 	us_audio_s *audio;
 	US_CALLOC(audio, 1);
 	audio->pcm_hz = pcm_hz;
-	audio->pcm_queue = us_queue_init(8);
-	audio->enc_queue = us_queue_init(8);
+	US_RING_INIT_WITH_ITEMS(audio->pcm_ring, 8, _pcm_buffer_init);
+	US_RING_INIT_WITH_ITEMS(audio->enc_ring, 8, _enc_buffer_init);
 	atomic_init(&audio->stop, false);
 
 	int err;
@@ -151,8 +154,8 @@ void us_audio_destroy(us_audio_s *audio) {
 	US_DELETE(audio->res, speex_resampler_destroy);
 	US_DELETE(audio->pcm, snd_pcm_close);
 	US_DELETE(audio->pcm_params, snd_pcm_hw_params_free);
-	US_QUEUE_DELETE_WITH_ITEMS(audio->enc_queue, free);
-	US_QUEUE_DELETE_WITH_ITEMS(audio->pcm_queue, free);
+	US_RING_DELETE_WITH_ITEMS(audio->enc_ring, free);
+	US_RING_DELETE_WITH_ITEMS(audio->pcm_ring, free);
 	if (audio->tids_created) {
 		US_JLOG_INFO("audio", "Pipeline closed");
 	}
@@ -163,23 +166,36 @@ int us_audio_get_encoded(us_audio_s *audio, uint8_t *data, size_t *size, uint64_
 	if (atomic_load(&audio->stop)) {
 		return -1;
 	}
-	_enc_buffer_s *buf;
-	if (!us_queue_get(audio->enc_queue, (void **)&buf, 0.1)) {
-		if (*size < buf->used) {
-			free(buf);
-			return -3;
-		}
-		memcpy(data, buf->data, buf->used);
-		*size = buf->used;
-		*pts = buf->pts;
-		free(buf);
-		return 0;
+	const int ri = us_ring_consumer_acquire(audio->enc_ring, 0.1);
+	if (ri < 0) {
+		return -2;
 	}
-	return -2;
+	const _enc_buffer_s *const buf = audio->enc_ring->items[ri];
+	if (*size < buf->used) {
+		us_ring_consumer_release(audio->enc_ring, ri);
+		return -3;
+	}
+	memcpy(data, buf->data, buf->used);
+	*size = buf->used;
+	*pts = buf->pts;
+	us_ring_consumer_release(audio->enc_ring, ri);
+	return 0;
+}
+
+static _pcm_buffer_s *_pcm_buffer_init(void) {
+	_pcm_buffer_s *buf;
+	US_CALLOC(buf, 1);
+	return buf;
+}
+
+static _enc_buffer_s *_enc_buffer_init(void) {
+	_enc_buffer_s *buf;
+	US_CALLOC(buf, 1);
+	return buf;
 }
 
 static void *_pcm_thread(void *v_audio) {
-	US_THREAD_RENAME("us_a_pcm");
+	US_THREAD_SETTLE("us_a_pcm");
 
 	us_audio_s *const audio = (us_audio_s *)v_audio;
 	uint8_t in[_MAX_BUF8];
@@ -194,13 +210,13 @@ static void *_pcm_thread(void *v_audio) {
 			break;
 		}
 
-		if (us_queue_get_free(audio->pcm_queue)) {
-			_pcm_buffer_s *out;
-			US_CALLOC(out, 1);
+		const int ri = us_ring_producer_acquire(audio->pcm_ring, 0);
+		if (ri >= 0) {
+			_pcm_buffer_s *const out = audio->pcm_ring->items[ri];
 			memcpy(out->data, in, audio->pcm_size);
-			assert(!us_queue_put(audio->pcm_queue, out, 0));
+			us_ring_producer_release(audio->pcm_ring, ri);
 		} else {
-			US_JLOG_ERROR("audio", "PCM queue is full");
+			US_JLOG_ERROR("audio", "PCM ring is full");
 		}
 	}
 
@@ -209,45 +225,50 @@ static void *_pcm_thread(void *v_audio) {
 }
 
 static void *_encoder_thread(void *v_audio) {
-	US_THREAD_RENAME("us_a_enc");
+	US_THREAD_SETTLE("us_a_enc");
 
 	us_audio_s *const audio = (us_audio_s *)v_audio;
 	int16_t in_res[_MAX_BUF16];
 
 	while (!atomic_load(&audio->stop)) {
-		_pcm_buffer_s *in;
-		if (!us_queue_get(audio->pcm_queue, (void **)&in, 0.1)) {
-			int16_t *in_ptr;
-			if (audio->res != NULL) {
-				assert(audio->pcm_hz != _ENCODER_INPUT_HZ);
-				uint32_t in_count = audio->pcm_frames;
-				uint32_t out_count = _HZ_TO_FRAMES(_ENCODER_INPUT_HZ);
-				speex_resampler_process_interleaved_int(audio->res, in->data, &in_count, in_res, &out_count);
-				in_ptr = in_res;
-			} else {
-				assert(audio->pcm_hz == _ENCODER_INPUT_HZ);
-				in_ptr = in->data;
-			}
+		const int in_ri = us_ring_consumer_acquire(audio->pcm_ring, 0.1);
+		if (in_ri < 0) {
+			continue;
+		}
+		_pcm_buffer_s *const in = audio->pcm_ring->items[in_ri];
 
-			_enc_buffer_s *out;
-			US_CALLOC(out, 1);
-			const int size = opus_encode(audio->enc, in_ptr, _HZ_TO_FRAMES(_ENCODER_INPUT_HZ), out->data, US_ARRAY_LEN(out->data));
-			free(in);
-			if (size < 0) {
-				_JLOG_PERROR_OPUS(size, "audio", "Fatal: Can't encode PCM frame to OPUS");
-				free(out);
-				break;
-			}
+		int16_t *in_ptr;
+		if (audio->res != NULL) {
+			assert(audio->pcm_hz != _ENCODER_INPUT_HZ);
+			uint32_t in_count = audio->pcm_frames;
+			uint32_t out_count = _HZ_TO_FRAMES(_ENCODER_INPUT_HZ);
+			speex_resampler_process_interleaved_int(audio->res, in->data, &in_count, in_res, &out_count);
+			in_ptr = in_res;
+		} else {
+			assert(audio->pcm_hz == _ENCODER_INPUT_HZ);
+			in_ptr = in->data;
+		}
+
+		const int out_ri = us_ring_producer_acquire(audio->enc_ring, 0);
+		if (out_ri < 0) {
+			US_JLOG_ERROR("audio", "OPUS encoder queue is full");
+			us_ring_consumer_release(audio->pcm_ring, in_ri);
+			continue;
+		}
+		_enc_buffer_s *const out = audio->enc_ring->items[out_ri];
+
+		const int size = opus_encode(audio->enc, in_ptr, _HZ_TO_FRAMES(_ENCODER_INPUT_HZ), out->data, US_ARRAY_LEN(out->data));
+		us_ring_consumer_release(audio->pcm_ring, in_ri);
+
+		if (size >= 0) {
 			out->used = size;
 			out->pts = audio->pts;
 			// https://datatracker.ietf.org/doc/html/rfc7587#section-4.2
 			audio->pts += _HZ_TO_FRAMES(_ENCODER_INPUT_HZ);
-
-			if (us_queue_put(audio->enc_queue, out, 0) != 0) {
-				US_JLOG_ERROR("audio", "OPUS encoder queue is full");
-				free(out);
-			}
+		} else {
+			_JLOG_PERROR_OPUS(size, "audio", "Fatal: Can't encode PCM frame to OPUS");
 		}
+		us_ring_producer_release(audio->enc_ring, out_ri);
 	}
 
 	atomic_store(&audio->stop, true);

janus/src/audio.h

@@ -37,10 +37,10 @@
 
 #include "uslibs/tools.h"
 #include "uslibs/array.h"
+#include "uslibs/ring.h"
 #include "uslibs/threading.h"
 
 #include "logging.h"
-#include "queue.h"
 
 
 typedef struct {
@@ -52,8 +52,8 @@ typedef struct {
 	SpeexResamplerState	*res;
 	OpusEncoder			*enc;
 
-	us_queue_s			*pcm_queue;
-	us_queue_s			*enc_queue;
+	us_ring_s			*pcm_ring;
+	us_ring_s			*enc_ring;
 	uint32_t			pts;
 
 	pthread_t			pcm_tid;

janus/src/client.c

@@ -22,6 +22,22 @@
 
 #include "client.h"
 
+#include <stdlib.h>
+#include <stdatomic.h>
+#include <string.h>
+
+#include <pthread.h>
+#include <janus/plugins/plugin.h>
+
+#include "uslibs/types.h"
+#include "uslibs/tools.h"
+#include "uslibs/threading.h"
+#include "uslibs/list.h"
+#include "uslibs/ring.h"
+
+#include "logging.h"
+#include "rtp.h"
+
 
 static void *_video_thread(void *v_client);
 static void *_audio_thread(void *v_client);
@@ -38,10 +54,10 @@ us_janus_client_s *us_janus_client_init(janus_callbacks *gw, janus_plugin_sessio
 
 	atomic_init(&client->stop, false);
 
-	client->video_queue = us_queue_init(2048);
+	US_RING_INIT_WITH_ITEMS(client->video_ring, 2048, us_rtp_init);
 	US_THREAD_CREATE(client->video_tid, _video_thread, client);
 
-	client->audio_queue = us_queue_init(64);
+	US_RING_INIT_WITH_ITEMS(client->audio_ring, 64, us_rtp_init);
 	US_THREAD_CREATE(client->audio_tid, _audio_thread, client);
 
 	return client;
@@ -49,14 +65,12 @@ us_janus_client_s *us_janus_client_init(janus_callbacks *gw, janus_plugin_sessio
 
 void us_janus_client_destroy(us_janus_client_s *client) {
 	atomic_store(&client->stop, true);
-	us_queue_put(client->video_queue, NULL, 0);
-	us_queue_put(client->audio_queue, NULL, 0);
 
 	US_THREAD_JOIN(client->video_tid);
-	US_QUEUE_DELETE_WITH_ITEMS(client->video_queue, us_rtp_destroy);
+	US_RING_DELETE_WITH_ITEMS(client->video_ring, us_rtp_destroy);
 
 	US_THREAD_JOIN(client->audio_tid);
-	US_QUEUE_DELETE_WITH_ITEMS(client->audio_queue, us_rtp_destroy);
+	US_RING_DELETE_WITH_ITEMS(client->audio_ring, us_rtp_destroy);
 
 	free(client);
 }
@@ -66,64 +80,69 @@ void us_janus_client_send(us_janus_client_s *client, const us_rtp_s *rtp) {
 		atomic_load(&client->transmit)
 		&& (rtp->video || atomic_load(&client->transmit_audio))
 	) {
-		us_rtp_s *const new = us_rtp_dup(rtp);
-		if (us_queue_put((new->video ? client->video_queue : client->audio_queue), new, 0) != 0) {
-			US_JLOG_ERROR("client", "Session %p %s queue is full",
-				client->session, (new->video ? "video" : "audio"));
-			us_rtp_destroy(new);
+		us_ring_s *const ring = (rtp->video ? client->video_ring : client->audio_ring);
+		const int ri = us_ring_producer_acquire(ring, 0);
+		if (ri < 0) {
+			US_JLOG_ERROR("client", "Session %p %s ring is full",
+				client->session, (rtp->video ? "video" : "audio"));
+			return;
 		}
+		memcpy(ring->items[ri], rtp, sizeof(us_rtp_s));
+		us_ring_producer_release(ring, ri);
 	}
 }
 
 static void *_video_thread(void *v_client) {
+	US_THREAD_SETTLE("us_c_video");
 	return _common_thread(v_client, true);
 }
 
 static void *_audio_thread(void *v_client) {
+	US_THREAD_SETTLE("us_c_audio");
 	return _common_thread(v_client, false);
 }
 
 static void *_common_thread(void *v_client, bool video) {
 	us_janus_client_s *const client = (us_janus_client_s *)v_client;
-	us_queue_s *const queue = (video ? client->video_queue : client->audio_queue);
-	assert(queue != NULL); // Audio may be NULL
+	us_ring_s *const ring = (video ? client->video_ring : client->audio_ring);
+	assert(ring != NULL); // Audio may be NULL
 
 	while (!atomic_load(&client->stop)) {
-		us_rtp_s *rtp;
-		if (!us_queue_get(queue, (void **)&rtp, 0.1)) {
-			if (rtp == NULL) {
-				break;
-			}
+		const int ri = us_ring_consumer_acquire(ring, 0.1);
+		if (ri < 0) {
+			continue;
+		}
+		us_rtp_s rtp;
+		memcpy(&rtp, ring->items[ri], sizeof(us_rtp_s));
+		us_ring_consumer_release(ring, ri);
 
-			if (
-				atomic_load(&client->transmit)
-				&& (video || atomic_load(&client->transmit_audio))
-			) {
-				janus_plugin_rtp packet = {0};
-				packet.video = rtp->video;
-				packet.buffer = (char *)rtp->datagram;
-				packet.length = rtp->used;
+		if (
+			atomic_load(&client->transmit)
+			&& (video || atomic_load(&client->transmit_audio))
+		) {
+			janus_plugin_rtp packet = {
+				.video = rtp.video,
+				.buffer = (char*)rtp.datagram,
+				.length = rtp.used,
 #				if JANUS_PLUGIN_API_VERSION >= 100
 				// The uStreamer Janus plugin places video in stream index 0 and audio
 				// (if available) in stream index 1.
-				packet.mindex = (rtp->video ? 0 : 1);
+				.mindex = (rtp.video ? 0 : 1),
 #				endif
+			};
+			janus_plugin_rtp_extensions_reset(&packet.extensions);
+			/*if (rtp->zero_playout_delay) {
+				// https://github.com/pikvm/pikvm/issues/784
+				packet.extensions.min_delay = 0;
+				packet.extensions.max_delay = 0;
+			} else {
+				packet.extensions.min_delay = 0;
+				// 10s - Chromium/WebRTC default
+				// 3s - Firefox default
+				packet.extensions.max_delay = 300; // == 3s, i.e. 10ms granularity
+			}*/
 
-				janus_plugin_rtp_extensions_reset(&packet.extensions);
-				/*if (rtp->zero_playout_delay) {
-					// https://github.com/pikvm/pikvm/issues/784
-					packet.extensions.min_delay = 0;
-					packet.extensions.max_delay = 0;
-				} else {
-					packet.extensions.min_delay = 0;
-					// 10s - Chromium/WebRTC default
-					// 3s - Firefox default
-					packet.extensions.max_delay = 300; // == 3s, i.e. 10ms granularity
-				}*/
-
-				client->gw->relay_rtp(client->session, &packet);
-			}
-			us_rtp_destroy(rtp);
+			client->gw->relay_rtp(client->session, &packet);
 		}
 	}
 	return NULL;

janus/src/client.h

@@ -22,20 +22,15 @@
 
 #pragma once
 
-#include <stdlib.h>
-#include <stdbool.h>
 #include <stdatomic.h>
-#include <string.h>
 
 #include <pthread.h>
 #include <janus/plugins/plugin.h>
 
-#include "uslibs/tools.h"
-#include "uslibs/threading.h"
+#include "uslibs/types.h"
 #include "uslibs/list.h"
+#include "uslibs/ring.h"
 
-#include "logging.h"
-#include "queue.h"
 #include "rtp.h"
 
 
@@ -49,8 +44,8 @@ typedef struct us_janus_client_sx {
 	pthread_t				audio_tid;
 	atomic_bool				stop;
 
-	us_queue_s				*video_queue;
-	us_queue_s				*audio_queue;
+	us_ring_s				*video_ring;
+	us_ring_s				*audio_ring;
 
     US_LIST_STRUCT(struct us_janus_client_sx);
 } us_janus_client_s;

janus/src/config.c

@@ -22,6 +22,17 @@
 
 #include "config.h"
 
+#include <stdlib.h>
+#include <string.h>
+
+#include <janus/config.h>
+#include <janus/plugins/plugin.h>
+
+#include "uslibs/tools.h"
+
+#include "const.h"
+#include "logging.h"
+
 
 static char *_get_value(janus_config *jcfg, const char *section, const char *option);
 // static bool _get_bool(janus_config *jcfg, const char *section, const char *option, bool def);
@@ -59,13 +70,14 @@ us_config_s *us_config_init(const char *config_dir_path) {
 	}
 
 	goto ok;
-	error:
-		us_config_destroy(config);
-		config = NULL;
-	ok:
-		US_DELETE(jcfg, janus_config_destroy);
-		free(config_file_path);
-		return config;
+
+error:
+	US_DELETE(config, us_config_destroy);
+
+ok:
+	US_DELETE(jcfg, janus_config_destroy);
+	free(config_file_path);
+	return config;
 }
 
 void us_config_destroy(us_config_s *config) {

janus/src/config.h

@@ -22,17 +22,6 @@
 
 #pragma once
 
-#include <stdlib.h>
-#include <string.h>
-
-#include <janus/config.h>
-#include <janus/plugins/plugin.h>
-
-#include "uslibs/tools.h"
-
-#include "const.h"
-#include "logging.h"
-
 
 typedef struct {
 	char	*video_sink_name;

janus/src/memsinkfd.c

@@ -22,13 +22,24 @@
 
 #include "memsinkfd.h"
 
+#include <unistd.h>
 
-int us_memsink_fd_wait_frame(int fd, us_memsink_shared_s* mem, uint64_t last_id) {
-	const long double deadline_ts = us_get_now_monotonic() + 1; // wait_timeout
-	long double now;
+#include <linux/videodev2.h>
+
+#include "uslibs/types.h"
+#include "uslibs/tools.h"
+#include "uslibs/frame.h"
+#include "uslibs/memsinksh.h"
+
+#include "logging.h"
+
+
+int us_memsink_fd_wait_frame(int fd, us_memsink_shared_s *mem, u64 last_id) {
+	const ldf deadline_ts = us_get_now_monotonic() + 1; // wait_timeout
+	ldf now_ts;
 	do {
 		const int result = us_flock_timedwait_monotonic(fd, 1); // lock_timeout
-		now = us_get_now_monotonic();
+		now_ts = us_get_now_monotonic();
 		if (result < 0 && errno != EWOULDBLOCK) {
 			US_JLOG_PERROR("video", "Can't lock memsink");
 			return -1;
@@ -42,12 +53,11 @@ int us_memsink_fd_wait_frame(int fd, us_memsink_shared_s* mem, uint64_t last_id)
 			}
 		}
 		usleep(1000); // lock_polling
-	} while (now < deadline_ts);
+	} while (now_ts < deadline_ts);
 	return -2;
 }
 
-us_frame_s *us_memsink_fd_get_frame(int fd, us_memsink_shared_s *mem, uint64_t *frame_id, bool key_required) {
-	us_frame_s *frame = us_frame_init();
+int us_memsink_fd_get_frame(int fd, us_memsink_shared_s *mem, us_frame_s *frame, u64 *frame_id, bool key_required) {
 	us_frame_set_data(frame, mem->data, mem->used);
 	US_FRAME_COPY_META(mem, frame);
 	*frame_id = mem->id;
@@ -56,18 +66,14 @@ us_frame_s *us_memsink_fd_get_frame(int fd, us_memsink_shared_s *mem, uint64_t *
 		mem->key_requested = true;
 	}
 
-	bool ok = true;
+	bool retval = 0;
 	if (frame->format != V4L2_PIX_FMT_H264) {
 		US_JLOG_ERROR("video", "Got non-H264 frame from memsink");
-		ok = false;
+		retval = -1;
 	}
 	if (flock(fd, LOCK_UN) < 0) {
 		US_JLOG_PERROR("video", "Can't unlock memsink");
-		ok = false;
+		retval = -1;
 	}
-	if (!ok) {
-		us_frame_destroy(frame);
-		frame = NULL;
-	}
-	return frame;
+	return retval;
 }

janus/src/memsinkfd.h

@@ -22,18 +22,10 @@
 
 #pragma once
 
-#include <stdbool.h>
-#include <stdint.h>
-#include <unistd.h>
-
-#include <linux/videodev2.h>
-
-#include "uslibs/tools.h"
+#include "uslibs/types.h"
 #include "uslibs/frame.h"
 #include "uslibs/memsinksh.h"
 
-#include "logging.h"
 
-
-int us_memsink_fd_wait_frame(int fd, us_memsink_shared_s* mem, uint64_t last_id);
-us_frame_s *us_memsink_fd_get_frame(int fd, us_memsink_shared_s *mem, uint64_t *frame_id, bool key_required);
+int us_memsink_fd_wait_frame(int fd, us_memsink_shared_s *mem, u64 last_id);
+int us_memsink_fd_get_frame(int fd, us_memsink_shared_s *mem, us_frame_s *frame, u64 *frame_id, bool key_required);

janus/src/plugin.c

@@ -20,8 +20,6 @@
 *****************************************************************************/
 
 
-#include <stdint.h>
-#include <stdbool.h>
 #include <stdatomic.h>
 #include <stdlib.h>
 #include <inttypes.h>
@@ -37,15 +35,16 @@
 #include <janus/plugins/plugin.h>
 #include <janus/rtcp.h>
 
+#include "uslibs/types.h"
 #include "uslibs/const.h"
 #include "uslibs/tools.h"
 #include "uslibs/threading.h"
 #include "uslibs/list.h"
+#include "uslibs/ring.h"
 #include "uslibs/memsinksh.h"
 
 #include "const.h"
 #include "logging.h"
-#include "queue.h"
 #include "client.h"
 #include "audio.h"
 #include "tc358743.h"
@@ -61,7 +60,7 @@ static const useconds_t	_g_watchers_polling = 100000;
 
 static us_janus_client_s	*_g_clients = NULL;
 static janus_callbacks		*_g_gw = NULL;
-static us_queue_s			*_g_video_queue = NULL;
+static us_ring_s			*_g_video_ring = NULL;
 static us_rtpv_s			*_g_rtpv = NULL;
 static us_rtpa_s			*_g_rtpa = NULL;
 
@@ -99,28 +98,32 @@ static atomic_bool		_g_key_required = false;
 janus_plugin *create(void);
 
 
-static void *_video_rtp_thread(UNUSED void *arg) {
-	US_THREAD_RENAME("us_video_rtp");
+static void *_video_rtp_thread(void *arg) {
+	(void)arg;
+	US_THREAD_SETTLE("us_video_rtp");
 	atomic_store(&_g_video_rtp_tid_created, true);
 
 	while (!_STOP) {
-		us_frame_s *frame;
-		if (us_queue_get(_g_video_queue, (void **)&frame, 0.1) == 0) {
+		const int ri = us_ring_consumer_acquire(_g_video_ring, 0.1);
+		if (ri >= 0) {
+			const us_frame_s *const frame = _g_video_ring->items[ri];
 			_LOCK_VIDEO;
 			const bool zero_playout_delay = (frame->gop == 0);
 			us_rtpv_wrap(_g_rtpv, frame, zero_playout_delay);
 			_UNLOCK_VIDEO;
-			us_frame_destroy(frame);
+			us_ring_consumer_release(_g_video_ring, ri);
 		}
 	}
 	return NULL;
 }
 
-static void *_video_sink_thread(UNUSED void *arg) {
-	US_THREAD_RENAME("us_video_sink");
+static void *_video_sink_thread(void *arg) {
+	(void)arg;
+	US_THREAD_SETTLE("us_video_sink");
 	atomic_store(&_g_video_sink_tid_created, true);
 
-	uint64_t frame_id = 0;
+	us_frame_s *drop = us_frame_init();
+	u64 frame_id = 0;
 	int once = 0;
 
 	while (!_STOP) {
@@ -147,40 +150,49 @@ static void *_video_sink_thread(UNUSED void *arg) {
 
 		US_JLOG_INFO("video", "Memsink opened; reading frames ...");
 		while (!_STOP && _HAS_WATCHERS) {
-			const int result = us_memsink_fd_wait_frame(fd, mem, frame_id);
-			if (result == 0) {
-				us_frame_s *const frame = us_memsink_fd_get_frame(fd, mem, &frame_id, atomic_load(&_g_key_required));
-				if (frame == NULL) {
+			const int waited = us_memsink_fd_wait_frame(fd, mem, frame_id);
+			if (waited == 0) {
+				const int ri = us_ring_producer_acquire(_g_video_ring, 0);
+				us_frame_s *frame;
+				if (ri >= 0) {
+					frame = _g_video_ring->items[ri];
+				} else {
+					US_ONCE({ US_JLOG_PERROR("video", "Video ring is full"); });
+					frame = drop;
+				}
+
+				const int got = us_memsink_fd_get_frame(fd, mem, frame, &frame_id, atomic_load(&_g_key_required));
+				if (ri >= 0) {
+					us_ring_producer_release(_g_video_ring, ri);
+				}
+				if (got < 0) {
 					goto close_memsink;
 				}
-				if (frame->key) {
+
+				if (ri >= 0 && frame->key) {
 					atomic_store(&_g_key_required, false);
 				}
-				if (us_queue_put(_g_video_queue, frame, 0) != 0) {
-					US_ONCE({ US_JLOG_PERROR("video", "Video queue is full"); });
-					us_frame_destroy(frame);
-				}
-			} else if (result == -1) {
+			} else if (waited != -2) {
 				goto close_memsink;
 			}
 		}
 
-		close_memsink:
-			if (mem != NULL) {
-				US_JLOG_INFO("video", "Memsink closed");
-				us_memsink_shared_unmap(mem);
-			}
-			if (fd >= 0) {
-				close(fd);
-			}
-			sleep(1); // error_delay
+	close_memsink:
+		US_DELETE(mem, us_memsink_shared_unmap);
+		US_CLOSE_FD(fd);
+		US_JLOG_INFO("video", "Memsink closed");
+		sleep(1); // error_delay
 	}
+
+	us_frame_destroy(drop);
 	return NULL;
 }
 
-static void *_audio_thread(UNUSED void *arg) {
-	US_THREAD_RENAME("us_audio");
+static void *_audio_thread(void *arg) {
+	(void)arg;
+	US_THREAD_SETTLE("us_audio");
 	atomic_store(&_g_audio_tid_created, true);
+
 	assert(_g_config->audio_dev_name != NULL);
 	assert(_g_config->tc358743_dev_path != NULL);
 
@@ -218,9 +230,9 @@ static void *_audio_thread(UNUSED void *arg) {
 				goto close_audio;
 			}
 
-			size_t size = US_RTP_DATAGRAM_SIZE - US_RTP_HEADER_SIZE;
-			uint8_t data[size];
-			uint64_t pts;
+			uz size = US_RTP_DATAGRAM_SIZE - US_RTP_HEADER_SIZE;
+			u8 data[size];
+			u64 pts;
 			const int result = us_audio_get_encoded(audio, data, &size, &pts);
 			if (result == 0) {
 				_LOCK_AUDIO;
@@ -231,9 +243,9 @@ static void *_audio_thread(UNUSED void *arg) {
 			}
 		}
 
-		close_audio:
-			US_DELETE(audio, us_audio_destroy);
-			sleep(1); // error_delay
+	close_audio:
+		US_DELETE(audio, us_audio_destroy);
+		sleep(1); // error_delay
 	}
 	return NULL;
 }
@@ -257,7 +269,7 @@ static int _plugin_init(janus_callbacks *gw, const char *config_dir_path) {
 	}
 	_g_gw = gw;
 
-	_g_video_queue = us_queue_init(1024);
+	US_RING_INIT_WITH_ITEMS(_g_video_ring, 64, us_frame_init);
 	_g_rtpv = us_rtpv_init(_relay_rtp_clients);
 	if (_g_config->audio_dev_name != NULL && us_audio_probe(_g_config->audio_dev_name)) {
 		_g_rtpa = us_rtpa_init(_relay_rtp_clients);
@@ -285,7 +297,7 @@ static void _plugin_destroy(void) {
 		us_janus_client_destroy(client);
 	});
 
-	US_QUEUE_DELETE_WITH_ITEMS(_g_video_queue, us_frame_destroy);
+	US_RING_DELETE_WITH_ITEMS(_g_video_ring, us_frame_destroy);
 
 	US_DELETE(_g_rtpa, us_rtpa_destroy);
 	US_DELETE(_g_rtpv, us_rtpv_destroy);
@@ -344,7 +356,8 @@ static json_t *_plugin_query_session(janus_plugin_session *session) {
 	return info;
 }
 
-static void _set_transmit(janus_plugin_session *session, UNUSED const char *msg, bool transmit) {
+static void _set_transmit(janus_plugin_session *session, const char *msg, bool transmit) {
+	(void)msg;
 	_IF_DISABLED({ return; });
 	_LOCK_ALL;
 	bool found = false;
@@ -494,16 +507,18 @@ static struct janus_plugin_result *_plugin_handle_message(
 		PUSH_ERROR(405, "Not implemented");
 	}
 
-	ok_wait:
-		FREE_MSG_JSEP;
-		return janus_plugin_result_new(JANUS_PLUGIN_OK_WAIT, NULL, NULL);
+ok_wait:
+	FREE_MSG_JSEP;
+	return janus_plugin_result_new(JANUS_PLUGIN_OK_WAIT, NULL, NULL);
 
 #	undef PUSH_STATUS
 #	undef PUSH_ERROR
 #	undef FREE_MSG_JSEP
 }
 
-static void _plugin_incoming_rtcp(UNUSED janus_plugin_session *handle, UNUSED janus_plugin_rtcp *packet) {
+static void _plugin_incoming_rtcp(janus_plugin_session *handle, janus_plugin_rtcp *packet) {
+	(void)handle;
+	(void)packet;
 	if (packet->video && janus_rtcp_has_pli(packet->buffer, packet->length)) {
 		// US_JLOG_INFO("main", "Got video PLI");
 		atomic_store(&_g_key_required, true);

janus/src/rtp.c

@@ -25,29 +25,30 @@
 
 #include "rtp.h"
 
+#include <stdlib.h>
 
-us_rtp_s *us_rtp_init(unsigned payload, bool video) {
+#include "uslibs/types.h"
+#include "uslibs/tools.h"
+
+
+us_rtp_s *us_rtp_init(void) {
 	us_rtp_s *rtp;
 	US_CALLOC(rtp, 1);
-	rtp->payload = payload;
-	rtp->video = video;
-	rtp->ssrc = us_triple_u32(us_get_now_monotonic_u64());
 	return rtp;
 }
 
-us_rtp_s *us_rtp_dup(const us_rtp_s *rtp) {
-	us_rtp_s *new;
-	US_CALLOC(new, 1);
-	memcpy(new, rtp, sizeof(us_rtp_s));
-	return new;
-}
-
 void us_rtp_destroy(us_rtp_s *rtp) {
 	free(rtp);
 }
 
-void us_rtp_write_header(us_rtp_s *rtp, uint32_t pts, bool marked) {
-	uint32_t word0 = 0x80000000;
+void us_rtp_assign(us_rtp_s *rtp, uint payload, bool video) {
+	rtp->payload = payload;
+	rtp->video = video;
+	rtp->ssrc = us_triple_u32(us_get_now_monotonic_u64());
+}
+
+void us_rtp_write_header(us_rtp_s *rtp, u32 pts, bool marked) {
+	u32 word0 = 0x80000000;
 	if (marked) {
 		word0 |= 1 << 23;
 	}
@@ -55,7 +56,8 @@ void us_rtp_write_header(us_rtp_s *rtp, uint32_t pts, bool marked) {
 	word0 |= rtp->seq;
 	++rtp->seq;
 
-#	define WRITE_BE_U32(_offset, _value) *((uint32_t *)(rtp->datagram + _offset)) = __builtin_bswap32(_value)
+#	define WRITE_BE_U32(x_offset, x_value) \
+		*((u32 *)(rtp->datagram + x_offset)) = __builtin_bswap32(x_value)
 	WRITE_BE_U32(0, word0);
 	WRITE_BE_U32(4, pts);
 	WRITE_BE_U32(8, rtp->ssrc);

janus/src/rtp.h

@@ -22,13 +22,7 @@
 
 #pragma once
 
-#include <stdlib.h>
-#include <stdint.h>
-#include <stdbool.h>
-
-#include <sys/types.h>
-
-#include "uslibs/tools.h"
+#include "uslibs/types.h"
 
 
 // https://stackoverflow.com/questions/47635545/why-webrtc-chose-rtp-max-packet-size-to-1200-bytes
@@ -37,21 +31,21 @@
 
 
 typedef struct {
-	unsigned	payload;
-	bool		video;
-	uint32_t	ssrc;
+	uint	payload;
+	bool	video;
+	u32		ssrc;
 
-	uint16_t	seq;
-	uint8_t		datagram[US_RTP_DATAGRAM_SIZE];
-	size_t		used;
-	bool		zero_playout_delay;
+	u16		seq;
+	u8		datagram[US_RTP_DATAGRAM_SIZE];
+	uz		used;
+	bool	zero_playout_delay;
 } us_rtp_s;
 
 typedef void (*us_rtp_callback_f)(const us_rtp_s *rtp);
 
 
-us_rtp_s *us_rtp_init(unsigned payload, bool video);
-us_rtp_s *us_rtp_dup(const us_rtp_s *rtp);
+us_rtp_s *us_rtp_init(void);
 void us_rtp_destroy(us_rtp_s *rtp);
 
-void us_rtp_write_header(us_rtp_s *rtp, uint32_t pts, bool marked);
+void us_rtp_assign(us_rtp_s *rtp, uint payload, bool video);
+void us_rtp_write_header(us_rtp_s *rtp, u32 pts, bool marked);

janus/src/rtpa.c

@@ -22,11 +22,18 @@
 
 #include "rtpa.h"
 
+#include <stdlib.h>
+#include <inttypes.h>
+
+#include "uslibs/types.h"
+#include "uslibs/tools.h"
+
 
 us_rtpa_s *us_rtpa_init(us_rtp_callback_f callback) {
 	us_rtpa_s *rtpa;
 	US_CALLOC(rtpa, 1);
-	rtpa->rtp = us_rtp_init(111, false);
+	rtpa->rtp = us_rtp_init();
+	us_rtp_assign(rtpa->rtp, 111, false);
 	rtpa->callback = callback;
 	return rtpa;
 }
@@ -37,7 +44,7 @@ void us_rtpa_destroy(us_rtpa_s *rtpa) {
 }
 
 char *us_rtpa_make_sdp(us_rtpa_s *rtpa) {
-#	define PAYLOAD rtpa->rtp->payload
+	const uint pl = rtpa->rtp->payload;
 	char *sdp;
 	US_ASPRINTF(sdp,
 		"m=audio 1 RTP/SAVPF %u" RN
@@ -49,14 +56,13 @@ char *us_rtpa_make_sdp(us_rtpa_s *rtpa) {
 		"a=rtcp-fb:%u goog-remb" RN
 		"a=ssrc:%" PRIu32 " cname:ustreamer" RN
 		"a=sendonly" RN,
-		PAYLOAD, PAYLOAD, PAYLOAD, PAYLOAD, PAYLOAD, // PAYLOAD,
+		pl, pl, pl, pl, pl, // pl,
 		rtpa->rtp->ssrc
 	);
-#	undef PAYLOAD
 	return sdp;
 }
 
-void us_rtpa_wrap(us_rtpa_s *rtpa, const uint8_t *data, size_t size, uint32_t pts) {
+void us_rtpa_wrap(us_rtpa_s *rtpa, const u8 *data, uz size, u32 pts) {
     if (size + US_RTP_HEADER_SIZE <= US_RTP_DATAGRAM_SIZE) {
         us_rtp_write_header(rtpa->rtp, pts, false);
         memcpy(rtpa->rtp->datagram + US_RTP_HEADER_SIZE, data, size);

janus/src/rtpa.h

@@ -22,15 +22,7 @@
 
 #pragma once
 
-#include <stdlib.h>
-#include <stdint.h>
-#include <stdbool.h>
-#include <inttypes.h>
-
-#include <sys/types.h>
-
-#include "uslibs/tools.h"
-#include "uslibs/threading.h"
+#include "uslibs/types.h"
 
 #include "rtp.h"
 
@@ -45,4 +37,4 @@ us_rtpa_s *us_rtpa_init(us_rtp_callback_f callback);
 void us_rtpa_destroy(us_rtpa_s *rtpa);
 
 char *us_rtpa_make_sdp(us_rtpa_s *rtpa);
-void us_rtpa_wrap(us_rtpa_s *rtpa, const uint8_t *data, size_t size, uint32_t pts);
+void us_rtpa_wrap(us_rtpa_s *rtpa, const u8 *data, uz size, u32 pts);

janus/src/rtpv.c

@@ -25,16 +25,27 @@
 
 #include "rtpv.h"
 
+#include <stdlib.h>
+#include <inttypes.h>
+#include <assert.h>
 
-void _rtpv_process_nalu(us_rtpv_s *rtpv, const uint8_t *data, size_t size, uint32_t pts, bool marked);
+#include <linux/videodev2.h>
 
-static ssize_t _find_annexb(const uint8_t *data, size_t size);
+#include "uslibs/types.h"
+#include "uslibs/tools.h"
+#include "uslibs/frame.h"
+
+
+void _rtpv_process_nalu(us_rtpv_s *rtpv, const u8 *data, uz size, u32 pts, bool marked);
+
+static sz _find_annexb(const u8 *data, uz size);
 
 
 us_rtpv_s *us_rtpv_init(us_rtp_callback_f callback) {
 	us_rtpv_s *rtpv;
 	US_CALLOC(rtpv, 1);
-	rtpv->rtp = us_rtp_init(96, true);
+	rtpv->rtp = us_rtp_init();
+	us_rtp_assign(rtpv->rtp, 96, true);
 	rtpv->callback = callback;
 	return rtpv;
 }
@@ -45,9 +56,9 @@ void us_rtpv_destroy(us_rtpv_s *rtpv) {
 }
 
 char *us_rtpv_make_sdp(us_rtpv_s *rtpv) {
-#	define PAYLOAD rtpv->rtp->payload
 	// https://tools.ietf.org/html/rfc6184
 	// https://github.com/meetecho/janus-gateway/issues/2443
+	const uint pl = rtpv->rtp->payload;
 	char *sdp;
 	US_ASPRINTF(sdp,
 		"m=video 1 RTP/SAVPF %u" RN
@@ -61,12 +72,11 @@ char *us_rtpv_make_sdp(us_rtpv_s *rtpv) {
 		"a=ssrc:%" PRIu32 " cname:ustreamer" RN
 		"a=extmap:1 http://www.webrtc.org/experiments/rtp-hdrext/playout-delay" RN
 		"a=sendonly" RN,
-		PAYLOAD, PAYLOAD, PAYLOAD, PAYLOAD,
-		PAYLOAD, PAYLOAD, PAYLOAD,
+		pl, pl, pl, pl,
+		pl, pl, pl,
 		rtpv->rtp->ssrc
 	);
 	return sdp;
-#	undef PAYLOAD
 }
 
 #define _PRE 3 // Annex B prefix length
@@ -79,20 +89,20 @@ void us_rtpv_wrap(us_rtpv_s *rtpv, const us_frame_s *frame, bool zero_playout_de
 
 	rtpv->rtp->zero_playout_delay = zero_playout_delay;
 
-	const uint32_t pts = us_get_now_monotonic_u64() * 9 / 100; // PTS units are in 90 kHz
-	ssize_t last_offset = -_PRE;
+	const u32 pts = us_get_now_monotonic_u64() * 9 / 100; // PTS units are in 90 kHz
+	sz last_offset = -_PRE;
 
 	while (true) { // Find and iterate by nalus
-		const size_t next_start = last_offset + _PRE;
-		ssize_t offset = _find_annexb(frame->data + next_start, frame->used - next_start);
+		const uz next_start = last_offset + _PRE;
+		sz offset = _find_annexb(frame->data + next_start, frame->used - next_start);
 		if (offset < 0) {
 			break;
 		}
 		offset += next_start;
 
 		if (last_offset >= 0) {
-			const uint8_t *const data = frame->data + last_offset + _PRE;
-			size_t size = offset - last_offset - _PRE;
+			const u8 *const data = frame->data + last_offset + _PRE;
+			uz size = offset - last_offset - _PRE;
 			if (data[size - 1] == 0) { // Check for extra 00
 				--size;
 			}
@@ -103,34 +113,33 @@ void us_rtpv_wrap(us_rtpv_s *rtpv, const us_frame_s *frame, bool zero_playout_de
 	}
 
 	if (last_offset >= 0) {
-		const uint8_t *const data = frame->data + last_offset + _PRE;
-		size_t size = frame->used - last_offset - _PRE;
+		const u8 *const data = frame->data + last_offset + _PRE;
+		uz size = frame->used - last_offset - _PRE;
 		_rtpv_process_nalu(rtpv, data, size, pts, true);
 	}
 }
 
-void _rtpv_process_nalu(us_rtpv_s *rtpv, const uint8_t *data, size_t size, uint32_t pts, bool marked) {
-#	define DG rtpv->rtp->datagram
-
-	const unsigned ref_idc = (data[0] >> 5) & 3;
-	const unsigned type = data[0] & 0x1F;
+void _rtpv_process_nalu(us_rtpv_s *rtpv, const u8 *data, uz size, u32 pts, bool marked) {
+	const uint ref_idc = (data[0] >> 5) & 3;
+	const uint type = data[0] & 0x1F;
+	u8 *dg = rtpv->rtp->datagram;
 
 	if (size + US_RTP_HEADER_SIZE <= US_RTP_DATAGRAM_SIZE) {
 		us_rtp_write_header(rtpv->rtp, pts, marked);
-		memcpy(DG + US_RTP_HEADER_SIZE, data, size);
+		memcpy(dg + US_RTP_HEADER_SIZE, data, size);
 		rtpv->rtp->used = size + US_RTP_HEADER_SIZE;
 		rtpv->callback(rtpv->rtp);
 		return;
 	}
 
-	const size_t fu_overhead = US_RTP_HEADER_SIZE + 2; // FU-A overhead
+	const uz fu_overhead = US_RTP_HEADER_SIZE + 2; // FU-A overhead
 
-	const uint8_t *src = data + 1;
-	ssize_t remaining = size - 1;
+	const u8 *src = data + 1;
+	sz remaining = size - 1;
 
 	bool first = true;
 	while (remaining > 0) {
-		ssize_t frag_size = US_RTP_DATAGRAM_SIZE - fu_overhead;
+		sz frag_size = US_RTP_DATAGRAM_SIZE - fu_overhead;
 		const bool last = (remaining <= frag_size);
 		if (last) {
 			frag_size = remaining;
@@ -138,18 +147,18 @@ void _rtpv_process_nalu(us_rtpv_s *rtpv, const uint8_t *data, size_t size, uint3
 
 		us_rtp_write_header(rtpv->rtp, pts, (marked && last));
 
-		DG[US_RTP_HEADER_SIZE] = 28 | (ref_idc << 5);
+		dg[US_RTP_HEADER_SIZE] = 28 | (ref_idc << 5);
 
-		uint8_t fu = type;
+		u8 fu = type;
 		if (first) {
 			fu |= 0x80;
 		}
 		if (last) {
 			fu |= 0x40;
 		}
-		DG[US_RTP_HEADER_SIZE + 1] = fu;
+		dg[US_RTP_HEADER_SIZE + 1] = fu;
 
-		memcpy(DG + fu_overhead, src, frag_size);
+		memcpy(dg + fu_overhead, src, frag_size);
 		rtpv->rtp->used = fu_overhead + frag_size;
 		rtpv->callback(rtpv->rtp);
 
@@ -157,14 +166,12 @@ void _rtpv_process_nalu(us_rtpv_s *rtpv, const uint8_t *data, size_t size, uint3
 		remaining -= frag_size;
 		first = false;
 	}
-
-#	undef DG
 }
 
-static ssize_t _find_annexb(const uint8_t *data, size_t size) {
+static sz _find_annexb(const u8 *data, uz size) {
 	// Parses buffer for 00 00 01 start codes
 	if (size >= _PRE) {
-		for (size_t index = 0; index <= size - _PRE; ++index) {
+		for (uz index = 0; index <= size - _PRE; ++index) {
 			if (data[index] == 0 && data[index + 1] == 0 && data[index + 2] == 1) {
 				return index;
 			}

janus/src/rtpv.h

@@ -22,16 +22,7 @@
 
 #pragma once
 
-#include <stdlib.h>
-#include <stdbool.h>
-#include <stdint.h>
-#include <inttypes.h>
-#include <assert.h>
-
-#include <sys/types.h>
-#include <linux/videodev2.h>
-
-#include "uslibs/tools.h"
+#include "uslibs/types.h"
 #include "uslibs/frame.h"
 
 #include "rtp.h"

janus/src/tc358743.c

@@ -22,6 +22,18 @@
 
 #include "tc358743.h"
 
+#include <unistd.h>
+#include <fcntl.h>
+
+#include <linux/videodev2.h>
+#include <linux/v4l2-controls.h>
+
+#include "uslibs/types.h"
+#include "uslibs/tools.h"
+#include "uslibs/xioctl.h"
+
+#include "logging.h"
+
 
 #ifndef V4L2_CID_USER_TC358743_BASE
 #	define V4L2_CID_USER_TC358743_BASE (V4L2_CID_USER_BASE + 0x1080)
@@ -44,8 +56,7 @@ int us_tc358743_read_info(const char *path, us_tc358743_info_s *info) {
 	}
 
 #	define READ_CID(x_cid, x_field) { \
-			struct v4l2_control m_ctl = {0}; \
-			m_ctl.id = x_cid; \
+			struct v4l2_control m_ctl = {.id = x_cid}; \
 			if (us_xioctl(fd, VIDIOC_G_CTRL, &m_ctl) < 0) { \
 				US_JLOG_PERROR("audio", "Can't get value of " #x_cid); \
 				close(fd); \
@@ -53,10 +64,8 @@ int us_tc358743_read_info(const char *path, us_tc358743_info_s *info) {
 			} \
 			info->x_field = m_ctl.value; \
 		}
-
 	READ_CID(TC358743_CID_AUDIO_PRESENT,		has_audio);
 	READ_CID(TC358743_CID_AUDIO_SAMPLING_RATE,	audio_hz);
-
 #	undef READ_CID
 
 	close(fd);

janus/src/tc358743.h

@@ -22,24 +22,12 @@
 
 #pragma once
 
-#include <unistd.h>
-#include <fcntl.h>
-#include <stdbool.h>
-
-#include <sys/types.h>
-
-#include <linux/videodev2.h>
-#include <linux/v4l2-controls.h>
-
-#include "uslibs/tools.h"
-#include "uslibs/xioctl.h"
-
-#include "logging.h"
+#include "uslibs/types.h"
 
 
 typedef struct {
-	bool		has_audio;
-	unsigned	audio_hz;
+	bool	has_audio;
+	uint	audio_hz;
 } us_tc358743_info_s;
 
 

janus/src/uslibs/queue.c

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

janus/src/uslibs/queue.h

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

janus/src/uslibs/ring.c

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

janus/src/uslibs/ring.h

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

janus/src/uslibs/types.h

@@ -0,0 +1,44 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2023  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+#pragma once
+
+#include <stdio.h>
+#include <stdbool.h>
+#include <stdint.h>
+
+
+typedef long long sll;
+typedef ssize_t sz;
+typedef int8_t s8;
+typedef int16_t s16;
+typedef int32_t s32;
+typedef int64_t s64;
+
+typedef unsigned uint;
+typedef unsigned long long ull;
+typedef size_t uz;
+typedef uint8_t u8;
+typedef uint16_t u16;
+typedef uint32_t u32;
+typedef uint64_t u64;
+
+typedef long double ldf;

linters/pylint.ini

@@ -33,7 +33,7 @@ max-line-length = 160
 
 [BASIC]
 # Good variable names which should always be accepted, separated by a comma
-good-names = _, __, x, y, ws, make-html-h, make-jpeg-h, make-ico-h
+good-names = _, __, x, y, ws, make-html-h, make-ico-h
 
 # Regular expression matching correct method names
 method-rgx = [a-z_][a-z0-9_]{2,50}$

linters/tox.ini

@@ -13,13 +13,13 @@ commands = cppcheck \
 			--std=c17 \
 			--error-exitcode=1 \
 			--quiet \
-			--enable=warning,unusedFunction,portability,performance,style \
+			--enable=warning,portability,performance,style \
 			--suppress=assignmentInAssert \
 			--suppress=variableScope \
 			--inline-suppr \
 			--library=python \
 			--include=linters/cppcheck.h \
-		src python/*.? janus/*.?
+		src python/src/*.? janus/src/*.?
 
 [testenv:flake8]
 allowlist_externals = bash

man/ustreamer-dump.1

@@ -1,6 +1,6 @@
 .\" Manpage for ustreamer-dump.
 .\" Open an issue or pull request to https://github.com/pikvm/ustreamer to correct errors or typos
-.TH USTREAMER-DUMP 1 "version 5.49" "January 2021"
+.TH USTREAMER-DUMP 1 "version 5.59" "January 2021"
 
 .SH NAME
 ustreamer-dump \- Dump uStreamer's memory sink to file

man/ustreamer.1

@@ -1,6 +1,6 @@
 .\" Manpage for ustreamer.
 .\" Open an issue or pull request to https://github.com/pikvm/ustreamer to correct errors or typos
-.TH USTREAMER 1 "version 5.49" "November 2020"
+.TH USTREAMER 1 "version 5.59" "November 2020"
 
 .SH NAME
 ustreamer \- stream MJPEG video from any V4L2 device to the network
@@ -17,7 +17,7 @@ Without arguments, \fBustreamer\fR will try to open \fB/dev/video0\fR with 640x4
 
 Please note that since µStreamer v2\.0 cross\-domain requests were disabled by default for security reasons\. To enable the old behavior, use the option \fB\-\-allow\-origin=\e*\fR\.
 
-For example, the recommended way of running µStreamer with Auvidea B101 on a Raspberry Pi is:
+For example, the recommended way of running µStreamer with TC358743-based capture device on a Raspberry Pi is:
 
 \fBustreamer \e\fR
 .RS
@@ -27,7 +27,7 @@ For example, the recommended way of running µStreamer with Auvidea B101 on a Ra
 .nf
 \fB\-\-workers=3 \e\fR # Maximum workers for V4L2 encoder
 .nf
-\fB\-\-persistent \e\fR # Don\'t re\-initialize device on timeout (for example when HDMI cable was disconnected)
+\fB\-\-persistent \e\fR # Suppress repetitive signal source errors (for example when HDMI cable was disconnected)
 .nf
 \fB\-\-dv\-timings \e\fR # Use DV\-timings
 .nf
@@ -69,7 +69,7 @@ Desired FPS. Default: maximum possible.
 Drop frames smaller then this limit. Useful if the device produces small\-sized garbage frames. Default: 128 bytes.
 .TP
 .BR \-n ", " \-\-persistent
-Don't re\-initialize device on timeout. Default: disabled.
+Suppress repetitive signal source errors. Default: disabled.
 .TP
 .BR \-t ", " \-\-dv\-timings
 Enable DV-timings querying and events processing to automatic resolution change. Default: disabled.
@@ -103,10 +103,10 @@ NOOP ─ Don't compress MJPEG stream (do nothing).
 It doesn't do anything. Still here for compatibility.
 .TP
 .BR \-k\ \fIpath ", " \-\-blank\ \fIpath
-Path to JPEG file that will be shown when the device is disconnected during the streaming. Default: black screen 640x480 with 'NO SIGNAL'.
+It doesn't do anything. Still here for compatibility.
 .TP
 .BR \-K\ \fIsec ", " \-\-last\-as\-blank\ \fIsec
-Show the last frame received from the camera after it was disconnected, but no more than specified time (or endlessly if 0 is specified). If the device has not yet been online, display 'NO SIGNAL' or the image specified by option \-\-blank. Note: currently this option has no effect on memory sinks. Default: disabled.
+It doesn't do anything. Still here for compatibility.
 .TP
 .BR \-l ", " \-\-slowdown
 Slowdown capturing to 1 FPS or less when no stream or sink clients are connected. Useful to reduce CPU consumption. Default: disabled.

pkg/arch/PKGBUILD

@@ -3,7 +3,7 @@
 
 
 pkgname=ustreamer
-pkgver=5.49
+pkgver=5.59
 pkgrel=1
 pkgdesc="Lightweight and fast MJPEG-HTTP streamer"
 url="https://github.com/pikvm/ustreamer"

pkg/openwrt/Makefile

@@ -6,7 +6,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=ustreamer
-PKG_VERSION:=5.49
+PKG_VERSION:=5.59
 PKG_RELEASE:=1
 PKG_MAINTAINER:=Maxim Devaev <mdevaev@gmail.com>
 

python/setup.py

@@ -17,7 +17,7 @@ def _find_sources(suffix: str) -> list[str]:
 if __name__ == "__main__":
     setup(
         name="ustreamer",
-        version="5.49",
+        version="5.59",
         description="uStreamer tools",
         author="Maxim Devaev",
         author_email="mdevaev@gmail.com",

python/src/uslibs/types.h

@@ -0,0 +1,44 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2023  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+#pragma once
+
+#include <stdio.h>
+#include <stdbool.h>
+#include <stdint.h>
+
+
+typedef long long sll;
+typedef ssize_t sz;
+typedef int8_t s8;
+typedef int16_t s16;
+typedef int32_t s32;
+typedef int64_t s64;
+
+typedef unsigned uint;
+typedef unsigned long long ull;
+typedef size_t uz;
+typedef uint8_t u8;
+typedef uint16_t u16;
+typedef uint32_t u32;
+typedef uint64_t u64;
+
+typedef long double ldf;

python/src/ustreamer.c

@@ -13,6 +13,7 @@
 
 #include <Python.h>
 
+#include "uslibs/types.h"
 #include "uslibs/tools.h"
 #include "uslibs/frame.h"
 #include "uslibs/memsinksh.h"
@@ -29,29 +30,16 @@ typedef struct {
 	int					fd;
 	us_memsink_shared_s	*mem;
 
-	uint64_t		frame_id;
-	long double		frame_ts;
+	u64				frame_id;
+	ldf				frame_ts;
 	us_frame_s		*frame;
 } _MemsinkObject;
 
 
-#define _MEM(x_next)	self->mem->x_next
-#define _FRAME(x_next)	self->frame->x_next
-
-
 static void _MemsinkObject_destroy_internals(_MemsinkObject *self) {
-	if (self->mem != NULL) {
-		us_memsink_shared_unmap(self->mem);
-		self->mem = NULL;
-	}
-	if (self->fd >= 0) {
-		close(self->fd);
-		self->fd = -1;
-	}
-	if (self->frame != NULL) {
-		us_frame_destroy(self->frame);
-		self->frame = NULL;
-	}
+	US_DELETE(self->mem, us_memsink_shared_unmap);
+	US_CLOSE_FD(self->fd);
+	US_DELETE(self->frame, us_frame_destroy);
 }
 
 static int _MemsinkObject_init(_MemsinkObject *self, PyObject *args, PyObject *kwargs) {
@@ -65,17 +53,15 @@ static int _MemsinkObject_init(_MemsinkObject *self, PyObject *args, PyObject *k
 		return -1;
 	}
 
-#	define SET_DOUBLE(_field, _cond) { \
-			if (!(self->_field _cond)) { \
-				PyErr_SetString(PyExc_ValueError, #_field " must be " #_cond); \
+#	define SET_DOUBLE(x_field, x_cond) { \
+			if (!(self->x_field x_cond)) { \
+				PyErr_SetString(PyExc_ValueError, #x_field " must be " #x_cond); \
 				return -1; \
 			} \
 		}
-
 	SET_DOUBLE(lock_timeout, > 0);
 	SET_DOUBLE(wait_timeout, > 0);
 	SET_DOUBLE(drop_same_frames, >= 0);
-
 #	undef SET_DOUBLE
 
 	self->frame = us_frame_init();
@@ -84,22 +70,20 @@ static int _MemsinkObject_init(_MemsinkObject *self, PyObject *args, PyObject *k
 		PyErr_SetFromErrno(PyExc_OSError);
 		goto error;
 	}
-
 	if ((self->mem = us_memsink_shared_map(self->fd)) == NULL) {
 		PyErr_SetFromErrno(PyExc_OSError);
 		goto error;
 	}
-
 	return 0;
 
-	error:
-		_MemsinkObject_destroy_internals(self);
-		return -1;
+error:
+	_MemsinkObject_destroy_internals(self);
+	return -1;
 }
 
 static PyObject *_MemsinkObject_repr(_MemsinkObject *self) {
 	char repr[1024];
-	snprintf(repr, 1023, "<Memsink(%s)>", self->obj);
+	US_SNPRINTF(repr, 1023, "<Memsink(%s)>", self->obj);
 	return Py_BuildValue("s", repr);
 }
 
@@ -123,61 +107,67 @@ static PyObject *_MemsinkObject_exit(_MemsinkObject *self, PyObject *Py_UNUSED(i
 }
 
 static int _wait_frame(_MemsinkObject *self) {
-	const long double deadline_ts = us_get_now_monotonic() + self->wait_timeout;
+	const ldf deadline_ts = us_get_now_monotonic() + self->wait_timeout;
 
-#	define RETURN_OS_ERROR { \
-			Py_BLOCK_THREADS \
-			PyErr_SetFromErrno(PyExc_OSError); \
-			return -1; \
-		}
-
-	long double now;
+	int locked = -1;
+	ldf now_ts;
 	do {
 		Py_BEGIN_ALLOW_THREADS
 
-		const int retval = us_flock_timedwait_monotonic(self->fd, self->lock_timeout);
-		now = us_get_now_monotonic();
-
-		if (retval < 0 && errno != EWOULDBLOCK) {
-			RETURN_OS_ERROR;
-
-		} else if (retval == 0) {
-			if (_MEM(magic) == US_MEMSINK_MAGIC && _MEM(version) == US_MEMSINK_VERSION && _MEM(id) != self->frame_id) {
-				if (self->drop_same_frames > 0) {
-					if (
-						US_FRAME_COMPARE_META_USED_NOTS(self->mem, self->frame)
-						&& (self->frame_ts + self->drop_same_frames > now)
-						&& !memcmp(_FRAME(data), _MEM(data), _MEM(used))
-					) {
-						self->frame_id = _MEM(id);
-						goto drop;
-					}
-				}
-
-				Py_BLOCK_THREADS
-				return 0;
+		locked = us_flock_timedwait_monotonic(self->fd, self->lock_timeout);
+		now_ts = us_get_now_monotonic();
+		if (locked < 0) {
+			if (errno == EWOULDBLOCK) {
+				goto retry;
 			}
+			goto os_error;
+		}
 
-			if (flock(self->fd, LOCK_UN) < 0) {
-				RETURN_OS_ERROR;
+		us_memsink_shared_s *mem = self->mem;
+		if (mem->magic != US_MEMSINK_MAGIC || mem->version != US_MEMSINK_VERSION) {
+			goto retry;
+		}
+
+		// Let the sink know that the client is alive
+		mem->last_client_ts = now_ts;
+
+		if (mem->id == self->frame_id) {
+			goto retry;
+		}
+
+		if (self->drop_same_frames > 0) {
+			if (
+				US_FRAME_COMPARE_GEOMETRY(self->mem, self->frame)
+				&& (self->frame_ts + self->drop_same_frames > now_ts)
+				&& !memcmp(self->frame->data, mem->data, mem->used)
+			) {
+				self->frame_id = mem->id;
+				goto retry;
 			}
 		}
 
-		drop:
+		// New frame found
+		Py_BLOCK_THREADS
+		return 0;
 
+	os_error:
+		Py_BLOCK_THREADS
+		PyErr_SetFromErrno(PyExc_OSError);
+		return -1;
+
+	retry:
+		if (locked >= 0 && flock(self->fd, LOCK_UN) < 0) {
+			goto os_error;
+		}
 		if (usleep(1000) < 0) {
-			RETURN_OS_ERROR;
+			goto os_error;
 		}
-
 		Py_END_ALLOW_THREADS
-
 		if (PyErr_CheckSignals() < 0) {
 			return -1;
 		}
-	} while (now < deadline_ts);
-
-#	undef RETURN_OS_ERROR
 
+	} while (now_ts < deadline_ts);
 	return -2;
 }
 
@@ -199,13 +189,13 @@ static PyObject *_MemsinkObject_wait_frame(_MemsinkObject *self, PyObject *args,
 		default: return NULL;
 	}
 
-	us_frame_set_data(self->frame, _MEM(data), _MEM(used));
+	us_memsink_shared_s *mem = self->mem;
+	us_frame_set_data(self->frame, mem->data, mem->used);
 	US_FRAME_COPY_META(self->mem, self->frame);
-	self->frame_id = _MEM(id);
+	self->frame_id = mem->id;
 	self->frame_ts = us_get_now_monotonic();
-	_MEM(last_client_ts) = self->frame_ts;
 	if (key_required) {
-		_MEM(key_requested) = true;
+		mem->key_requested = true;
 	}
 
 	if (flock(self->fd, LOCK_UN) < 0) {
@@ -217,18 +207,18 @@ static PyObject *_MemsinkObject_wait_frame(_MemsinkObject *self, PyObject *args,
 		return NULL;
 	}
 
-#	define SET_VALUE(_key, _maker) { \
-			PyObject *_tmp = _maker; \
-			if (_tmp == NULL) { \
+#	define SET_VALUE(x_key, x_maker) { \
+			PyObject *m_tmp = x_maker; \
+			if (m_tmp == NULL) { \
 				return NULL; \
 			} \
-			if (PyDict_SetItemString(dict_frame, _key, _tmp) < 0) { \
-				Py_DECREF(_tmp); \
+			if (PyDict_SetItemString(dict_frame, x_key, m_tmp) < 0) { \
+				Py_DECREF(m_tmp); \
 				return NULL; \
 			} \
-			Py_DECREF(_tmp); \
+			Py_DECREF(m_tmp); \
 		}
-#	define SET_NUMBER(_key, _from, _to) SET_VALUE(#_key, Py##_to##_From##_from(_FRAME(_key)))
+#	define SET_NUMBER(x_key, x_from, x_to) SET_VALUE(#x_key, Py##x_to##_From##x_from(self->frame->x_key))
 
 	SET_NUMBER(width, Long, Long);
 	SET_NUMBER(height, Long, Long);
@@ -240,7 +230,7 @@ static PyObject *_MemsinkObject_wait_frame(_MemsinkObject *self, PyObject *args,
 	SET_NUMBER(grab_ts, Double, Float);
 	SET_NUMBER(encode_begin_ts, Double, Float);
 	SET_NUMBER(encode_end_ts, Double, Float);
-	SET_VALUE("data", PyBytes_FromStringAndSize((const char *)_FRAME(data), _FRAME(used)));
+	SET_VALUE("data", PyBytes_FromStringAndSize((const char *)self->frame->data, self->frame->used));
 
 #	undef SET_NUMBER
 #	undef SET_VALUE
@@ -252,21 +242,19 @@ static PyObject *_MemsinkObject_is_opened(_MemsinkObject *self, PyObject *Py_UNU
 	return PyBool_FromLong(self->mem != NULL && self->fd > 0);
 }
 
-#define FIELD_GETTER(_field, _from, _to) \
-	static PyObject *_MemsinkObject_getter_##_field(_MemsinkObject *self, void *Py_UNUSED(closure)) { \
-		return Py##_to##_From##_from(self->_field); \
+#define FIELD_GETTER(x_field, x_from, x_to) \
+	static PyObject *_MemsinkObject_getter_##x_field(_MemsinkObject *self, void *Py_UNUSED(closure)) { \
+		return Py##x_to##_From##x_from(self->x_field); \
 	}
-
 FIELD_GETTER(obj, String, Unicode)
 FIELD_GETTER(lock_timeout, Double, Float)
 FIELD_GETTER(wait_timeout, Double, Float)
 FIELD_GETTER(drop_same_frames, Double, Float)
-
 #undef FIELD_GETTER
 
 static PyMethodDef _MemsinkObject_methods[] = {
-#	define ADD_METHOD(_name, _method, _flags) \
-		{.ml_name = _name, .ml_meth = (PyCFunction)_MemsinkObject_##_method, .ml_flags = (_flags)}
+#	define ADD_METHOD(x_name, x_method, x_flags) \
+		{.ml_name = x_name, .ml_meth = (PyCFunction)_MemsinkObject_##x_method, .ml_flags = (x_flags)}
 	ADD_METHOD("close", close, METH_NOARGS),
 	ADD_METHOD("__enter__", enter, METH_NOARGS),
 	ADD_METHOD("__exit__", exit, METH_VARARGS),
@@ -277,7 +265,7 @@ static PyMethodDef _MemsinkObject_methods[] = {
 };
 
 static PyGetSetDef _MemsinkObject_getsets[] = {
-#	define ADD_GETTER(_field) {.name = #_field, .get = (getter)_MemsinkObject_getter_##_field}
+#	define ADD_GETTER(x_field) {.name = #x_field, .get = (getter)_MemsinkObject_getter_##x_field}
 	ADD_GETTER(obj),
 	ADD_GETTER(lock_timeout),
 	ADD_GETTER(wait_timeout),
@@ -305,7 +293,7 @@ static PyModuleDef _Module = {
 	.m_size = -1,
 };
 
-PyMODINIT_FUNC PyInit_ustreamer(void) { // cppcheck-suppress unusedFunction
+PyMODINIT_FUNC PyInit_ustreamer(void) {
 	PyObject *module = PyModule_Create(&_Module);
 	if (module == NULL) {
 		return NULL;

src/Makefile

@@ -9,11 +9,12 @@ LDFLAGS ?=
 # =====
 _USTR = ustreamer.bin
 _DUMP = ustreamer-dump.bin
+_V4P = ustreamer-v4p.bin
 
 _CFLAGS = -MD -c -std=c17 -Wall -Wextra -D_GNU_SOURCE $(CFLAGS)
 _LDFLAGS = $(LDFLAGS)
 
-_COMMON_LIBS = -lm -ljpeg -pthread -lrt
+_COMMON_LIBS = -lm -ljpeg -pthread -lrt -latomic
 
 _USTR_LIBS = $(_COMMON_LIBS) -levent -levent_pthreads
 _USTR_SRCS = $(shell ls \
@@ -32,9 +33,19 @@ _DUMP_SRCS = $(shell ls \
 	dump/*.c \
 )
 
+_V4P_LIBS = $(_COMMON_LIBS)
+_V4P_SRCS = $(shell ls \
+	libs/*.c \
+	v4p/*.c \
+)
+
 _BUILD = build
 
 
+_TARGETS = $(_USTR) $(_DUMP)
+_OBJS = $(_USTR_SRCS:%.c=$(_BUILD)/%.o) $(_DUMP_SRCS:%.c=$(_BUILD)/%.o)
+
+
 define optbool
 $(filter $(shell echo $(1) | tr A-Z a-z), yes on 1)
 endef
@@ -69,19 +80,28 @@ override _CFLAGS += -DWITH_SETPROCTITLE
 endif
 
 
+WITH_V4P ?= 0
+ifneq ($(call optbool,$(WITH_V4P)),)
+override _TARGETS += $(_V4P)
+override _OBJS += $(_V4P_SRCS:%.c=$(_BUILD)/%.o)
+override _CFLAGS += $(shell pkg-config --cflags libdrm)
+_V4P_LDFLAGS = $(shell pkg-config --libs libdrm)
+endif
+
+
 # =====
-all: $(_USTR) $(_DUMP)
+all: $(_TARGETS)
 
 
 install: all
 	mkdir -p $(DESTDIR)$(PREFIX)/bin
-	install -m755 $(_USTR) $(DESTDIR)$(PREFIX)/bin/$(subst .bin,,$(_USTR))
-	install -m755 $(_DUMP) $(DESTDIR)$(PREFIX)/bin/$(subst .bin,,$(_DUMP))
+	for i in $(subst .bin,,$(_TARGETS)); do \
+		install -m755 $$i.bin $(DESTDIR)$(PREFIX)/bin/$$i; \
+	done
 
 
 install-strip: install
-	strip $(DESTDIR)$(PREFIX)/bin/$(subst .bin,,$(_USTR))
-	strip $(DESTDIR)$(PREFIX)/bin/$(subst .bin,,$(_DUMP))
+	for i in $(subst .bin,,$(_TARGETS)); do strip $(DESTDIR)$(PREFIX)/bin/$$i; done
 
 
 $(_USTR): $(_USTR_SRCS:%.c=$(_BUILD)/%.o)
@@ -94,6 +114,11 @@ $(_DUMP): $(_DUMP_SRCS:%.c=$(_BUILD)/%.o)
 	$(ECHO) $(CC) $^ -o $@ $(_LDFLAGS) $(_DUMP_LIBS)
 
 
+$(_V4P): $(_V4P_SRCS:%.c=$(_BUILD)/%.o)
+	$(info == LD $@)
+	$(ECHO) $(CC) $^ -o $@ $(_LDFLAGS) $(_V4P_LDFLAGS) $(_V4P_LIBS)
+
+
 $(_BUILD)/%.o: %.c
 	$(info -- CC $<)
 	$(ECHO) mkdir -p $(dir $@) || true
@@ -101,8 +126,7 @@ $(_BUILD)/%.o: %.c
 
 
 clean:
-	rm -rf $(_USTR) $(_DUMP) $(_BUILD)
+	rm -rf $(_USTR) $(_DUMP) $(_V4P) $(_BUILD)
 
 
-_OBJS = $(_USTR_SRCS:%.c=$(_BUILD)/%.o) $(_DUMP_SRCS:%.c=$(_BUILD)/%.o)
 -include $(_OBJS:%.o=%.d)

src/dump/main.c

@@ -24,7 +24,6 @@
 #include <stdlib.h>
 #include <stdbool.h>
 #include <unistd.h>
-#include <signal.h>
 #include <limits.h>
 #include <float.h>
 #include <getopt.h>
@@ -36,6 +35,7 @@
 #include "../libs/logging.h"
 #include "../libs/frame.h"
 #include "../libs/memsink.h"
+#include "../libs/signal.h"
 #include "../libs/options.h"
 
 #include "file.h"
@@ -95,7 +95,6 @@ typedef struct {
 
 
 static void _signal_handler(int signum);
-static void _install_signal_handlers(void);
 
 static int _dump_sink(
 	const char *sink_name, unsigned sink_timeout,
@@ -190,7 +189,7 @@ int main(int argc, char *argv[]) {
 		ctx.destroy = us_output_file_destroy;
 	}
 
-	_install_signal_handlers();
+	us_install_signals_handler(_signal_handler, false);
 	const int retval = abs(_dump_sink(sink_name, sink_timeout, count, interval, key_required, &ctx));
 	if (ctx.v_output && ctx.destroy) {
 		ctx.destroy(ctx.v_output);
@@ -206,31 +205,14 @@ static void _signal_handler(int signum) {
 	_g_stop = true;
 }
 
-static void _install_signal_handlers(void) {
-	struct sigaction sig_act = {0};
-
-	assert(!sigemptyset(&sig_act.sa_mask));
-	sig_act.sa_handler = _signal_handler;
-	assert(!sigaddset(&sig_act.sa_mask, SIGINT));
-	assert(!sigaddset(&sig_act.sa_mask, SIGTERM));
-	assert(!sigaddset(&sig_act.sa_mask, SIGPIPE));
-
-	US_LOG_DEBUG("Installing SIGINT handler ...");
-	assert(!sigaction(SIGINT, &sig_act, NULL));
-
-	US_LOG_DEBUG("Installing SIGTERM handler ...");
-	assert(!sigaction(SIGTERM, &sig_act, NULL));
-
-	US_LOG_DEBUG("Installing SIGTERM handler ...");
-	assert(!sigaction(SIGPIPE, &sig_act, NULL));
-}
-
 static int _dump_sink(
 	const char *sink_name, unsigned sink_timeout,
 	long long count, long double interval,
 	bool key_required,
 	_output_context_s *ctx) {
 
+	int retval = -1;
+
 	if (count == 0) {
 		count = -1;
 	}
@@ -300,18 +282,13 @@ static int _dump_sink(
 		}
 	}
 
-	int retval = 0;
-	goto ok;
+	retval = 0;
 
-	error:
-		retval = -1;
-
-	ok:
-		US_DELETE(sink, us_memsink_destroy);
-		us_frame_destroy(frame);
-
-		US_LOG_INFO("Bye-bye");
-		return retval;
+error:
+	US_DELETE(sink, us_memsink_destroy);
+	us_frame_destroy(frame);
+	US_LOG_INFO("Bye-bye");
+	return retval;
 }
 
 static void _help(FILE *fp) {

src/libs/base64.c

@@ -22,6 +22,13 @@
 
 #include "base64.h"
 
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+
+#include "types.h"
+#include "tools.h"
+
 
 static const char _ENCODING_TABLE[] = {
 	'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
@@ -34,11 +41,11 @@ static const char _ENCODING_TABLE[] = {
 	'4', '5', '6', '7', '8', '9', '+', '/',
 };
 
-static const unsigned _MOD_TABLE[] = {0, 2, 1};
+static const uint _MOD_TABLE[] = {0, 2, 1};
 
 
-void us_base64_encode(const uint8_t *data, size_t size, char **encoded, size_t *allocated) {
-	const size_t encoded_size = 4 * ((size + 2) / 3) + 1; // +1 for '\0'
+void us_base64_encode(const u8 *data, uz size, char **encoded, uz *allocated) {
+	const uz encoded_size = 4 * ((size + 2) / 3) + 1; // +1 for '\0'
 
 	if (*encoded == NULL || (allocated && *allocated < encoded_size)) {
 		US_REALLOC(*encoded, encoded_size);
@@ -47,14 +54,14 @@ void us_base64_encode(const uint8_t *data, size_t size, char **encoded, size_t *
 		}
 	}
 
-	for (unsigned data_index = 0, encoded_index = 0; data_index < size;) {
-#		define OCTET(_name) unsigned _name = (data_index < size ? (uint8_t)data[data_index++] : 0)
+	for (uint data_index = 0, encoded_index = 0; data_index < size;) {
+#		define OCTET(_name) uint _name = (data_index < size ? (u8)data[data_index++] : 0)
 		OCTET(octet_a);
 		OCTET(octet_b);
 		OCTET(octet_c);
 #		undef OCTET
 
-		const unsigned triple = (octet_a << 0x10) + (octet_b << 0x08) + octet_c;
+		const uint triple = (octet_a << 0x10) + (octet_b << 0x08) + octet_c;
 
 #		define ENCODE(_offset) (*encoded)[encoded_index++] = _ENCODING_TABLE[(triple >> _offset * 6) & 0x3F]
 		ENCODE(3);
@@ -64,7 +71,7 @@ void us_base64_encode(const uint8_t *data, size_t size, char **encoded, size_t *
 #		undef ENCODE
 	}
 
-	for (unsigned index = 0; index < _MOD_TABLE[size % 3]; index++) {
+	for (uint index = 0; index < _MOD_TABLE[size % 3]; index++) {
 		(*encoded)[encoded_size - 2 - index] = '=';
 	}
 

src/libs/base64.h

@@ -22,13 +22,7 @@
 
 #pragma once
 
-#include <stdlib.h>
-#include <stdint.h>
-#include <string.h>
-
-#include <sys/types.h>
-
-#include "tools.h"
+#include "types.h"
 
 
-void us_base64_encode(const uint8_t *data, size_t size, char **encoded, size_t *allocated);
+void us_base64_encode(const u8 *data, uz size, char **encoded, uz *allocated);

src/libs/const.h

@@ -22,11 +22,14 @@
 
 #pragma once
 
+#include "types.h"
+
+
 #define US_VERSION_MAJOR 5
-#define US_VERSION_MINOR 49
+#define US_VERSION_MINOR 59
 
 #define US_MAKE_VERSION2(_major, _minor) #_major "." #_minor
 #define US_MAKE_VERSION1(_major, _minor) US_MAKE_VERSION2(_major, _minor)
 #define US_VERSION US_MAKE_VERSION1(US_VERSION_MAJOR, US_VERSION_MINOR)
 
-#define US_VERSION_U ((unsigned)(US_VERSION_MAJOR * 1000 + US_VERSION_MINOR))
+#define US_VERSION_U ((uint)(US_VERSION_MAJOR * 1000 + US_VERSION_MINOR))

src/libs/device.h

@@ -22,48 +22,24 @@
 
 #pragma once
 
-#include <stdlib.h>
-#include <stddef.h>
-#include <stdint.h>
-#include <stdbool.h>
-#include <string.h>
-#include <strings.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <assert.h>
+#include <stdatomic.h>
 
-#include <sys/select.h>
-#include <sys/mman.h>
-#include <sys/time.h>
-
-#include <pthread.h>
 #include <linux/videodev2.h>
-#include <linux/v4l2-controls.h>
 
-#include "../libs/tools.h"
-#include "../libs/array.h"
-#include "../libs/logging.h"
-#include "../libs/threading.h"
-#include "../libs/frame.h"
-#include "../libs/xioctl.h"
+#include "types.h"
+#include "frame.h"
 
 
-#define US_VIDEO_MIN_WIDTH		((unsigned)160)
-#define US_VIDEO_MAX_WIDTH		((unsigned)15360)
+#define US_VIDEO_MIN_WIDTH		((uint)160)
+#define US_VIDEO_MAX_WIDTH		((uint)15360) // Remember about stream->run->http_capture_state;
 
-#define US_VIDEO_MIN_HEIGHT		((unsigned)120)
-#define US_VIDEO_MAX_HEIGHT		((unsigned)8640)
+#define US_VIDEO_MIN_HEIGHT		((uint)120)
+#define US_VIDEO_MAX_HEIGHT		((uint)8640)
 
-#define US_VIDEO_MAX_FPS		((unsigned)120)
+#define US_VIDEO_MAX_FPS		((uint)120)
 
-#define US_STANDARD_UNKNOWN		V4L2_STD_UNKNOWN
 #define US_STANDARDS_STR		"PAL, NTSC, SECAM"
-
-#define US_FORMAT_UNKNOWN		-1
 #define US_FORMATS_STR			"YUYV, YVYU, UYVY, RGB565, RGB24, BGR24, MJPEG, JPEG"
-
-#define US_IO_METHOD_UNKNOWN	-1
 #define US_IO_METHODS_STR		"MMAP, USERPTR"
 
 
@@ -72,22 +48,26 @@ typedef struct {
 	struct v4l2_buffer	buf;
 	int					dma_fd;
 	bool				grabbed;
+	atomic_int			refs;
 } us_hw_buffer_s;
 
 typedef struct {
 	int					fd;
-	unsigned			width;
-	unsigned			height;
-	unsigned			format;
-	unsigned			stride;
-	unsigned			hw_fps;
-	unsigned			jpeg_quality;
-	size_t				raw_size;
-	unsigned			n_bufs;
+	uint				width;
+	uint				height;
+	uint				format;
+	uint				stride;
+	float				hz;
+	uint				hw_fps;
+	uint				jpeg_quality;
+	uz					raw_size;
+	uint				n_bufs;
 	us_hw_buffer_s		*hw_bufs;
+	bool				dma;
 	enum v4l2_buf_type	capture_type;
-	bool				capturing;
-	bool				persistent_timeout_reported;
+	bool				capture_mplane;
+	bool				streamon;
+	int					open_error_reported;
 } us_device_runtime_s;
 
 typedef enum {
@@ -120,19 +100,21 @@ typedef struct {
 
 typedef struct {
 	char				*path;
-	unsigned			input;
-	unsigned			width;
-	unsigned			height;
-	unsigned			format;
-	unsigned			jpeg_quality;
+	uint				input;
+	uint				width;
+	uint				height;
+	uint				format;
+	uint				jpeg_quality;
 	v4l2_std_id			standard;
 	enum v4l2_memory	io_method;
 	bool				dv_timings;
-	unsigned			n_bufs;
-	unsigned			desired_fps;
-	size_t				min_frame_size;
+	uint				n_bufs;
+	bool				dma_export;
+	bool				dma_required;
+	uint				desired_fps;
+	uz					min_frame_size;
 	bool				persistent;
-	unsigned			timeout;
+	uint				timeout;
 	us_controls_s 		ctl;
 	us_device_runtime_s *run;
 } us_device_s;
@@ -142,15 +124,14 @@ us_device_s *us_device_init(void);
 void us_device_destroy(us_device_s *dev);
 
 int us_device_parse_format(const char *str);
-v4l2_std_id us_device_parse_standard(const char *str);
+int us_device_parse_standard(const char *str);
 int us_device_parse_io_method(const char *str);
 
 int us_device_open(us_device_s *dev);
 void us_device_close(us_device_s *dev);
 
-int us_device_export_to_dma(us_device_s *dev);
-int us_device_switch_capturing(us_device_s *dev, bool enable);
-int us_device_select(us_device_s *dev, bool *has_read, bool *has_write, bool *has_error);
 int us_device_grab_buffer(us_device_s *dev, us_hw_buffer_s **hw);
 int us_device_release_buffer(us_device_s *dev, us_hw_buffer_s *hw);
-int us_device_consume_event(us_device_s *dev);
+
+void us_device_buffer_incref(us_hw_buffer_s *hw);
+void us_device_buffer_decref(us_hw_buffer_s *hw);

src/libs/frame.c

@@ -22,6 +22,16 @@
 
 #include "frame.h"
 
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+
+#include <linux/videodev2.h>
+
+#include "types.h"
+#include "tools.h"
+
 
 us_frame_s *us_frame_init(void) {
 	us_frame_s *frame;
@@ -36,21 +46,21 @@ void us_frame_destroy(us_frame_s *frame) {
 	free(frame);
 }
 
-void us_frame_realloc_data(us_frame_s *frame, size_t size) {
+void us_frame_realloc_data(us_frame_s *frame, uz size) {
 	if (frame->allocated < size) {
 		US_REALLOC(frame->data, size);
 		frame->allocated = size;
 	}
 }
 
-void us_frame_set_data(us_frame_s *frame, const uint8_t *data, size_t size) {
+void us_frame_set_data(us_frame_s *frame, const u8 *data, uz size) {
 	us_frame_realloc_data(frame, size);
 	memcpy(frame->data, data, size);
 	frame->used = size;
 }
 
-void us_frame_append_data(us_frame_s *frame, const uint8_t *data, size_t size) {
-	const size_t new_used = frame->used + size;
+void us_frame_append_data(us_frame_s *frame, const u8 *data, uz size) {
+	const uz new_used = frame->used + size;
 	us_frame_realloc_data(frame, new_used);
 	memcpy(frame->data + frame->used, data, size);
 	frame->used = new_used;
@@ -64,13 +74,13 @@ void us_frame_copy(const us_frame_s *src, us_frame_s *dest) {
 bool us_frame_compare(const us_frame_s *a, const us_frame_s *b) {
 	return (
 		a->allocated && b->allocated
-		&& US_FRAME_COMPARE_META_USED_NOTS(a, b)
+		&& US_FRAME_COMPARE_GEOMETRY(a, b)
 		&& !memcmp(a->data, b->data, b->used)
 	);
 }
 
-unsigned us_frame_get_padding(const us_frame_s *frame) {
-	unsigned bytes_per_pixel = 0;
+uint us_frame_get_padding(const us_frame_s *frame) {
+	uint bytes_per_pixel = 0;
 	switch (frame->format) {
 		case V4L2_PIX_FMT_YUYV:
 		case V4L2_PIX_FMT_YVYU:
@@ -89,13 +99,17 @@ unsigned us_frame_get_padding(const us_frame_s *frame) {
 	return 0;
 }
 
-const char *us_fourcc_to_string(unsigned format, char *buf, size_t size) {
+bool us_is_jpeg(uint format) {
+	return (format == V4L2_PIX_FMT_JPEG || format == V4L2_PIX_FMT_MJPEG);
+}
+
+const char *us_fourcc_to_string(uint format, char *buf, uz size) {
 	assert(size >= 8);
 	buf[0] = format & 0x7F;
 	buf[1] = (format >> 8) & 0x7F;
 	buf[2] = (format >> 16) & 0x7F;
 	buf[3] = (format >> 24) & 0x7F;
-	if (format & ((unsigned)1 << 31)) {
+	if (format & ((uint)1 << 31)) {
 		buf[4] = '-';
 		buf[5] = 'B';
 		buf[6] = 'E';

src/libs/frame.h

@@ -22,39 +22,30 @@
 
 #pragma once
 
-#include <stddef.h>
-#include <stdint.h>
-#include <stdbool.h>
-#include <stdlib.h>
-#include <string.h>
-#include <assert.h>
-
-#include <linux/videodev2.h>
-
+#include "types.h"
 #include "tools.h"
 
 
 typedef struct {
-	uint8_t		*data;
-	size_t		used;
-	size_t		allocated;
-	int			dma_fd;
+	u8		*data;
+	uz		used;
+	uz		allocated;
+	int		dma_fd;
 
-	unsigned	width;
-	unsigned	height;
-	unsigned	format;
-	unsigned	stride;
+	uint	width;
+	uint	height;
+	uint	format;
+	uint	stride;
 	// Stride is a bytesperline in V4L2
 	// https://www.kernel.org/doc/html/v4.14/media/uapi/v4l/pixfmt-v4l2.html
 	// https://medium.com/@oleg.shipitko/what-does-stride-mean-in-image-processing-bba158a72bcd
+	bool	online;
+	bool	key;
+	uint	gop;
 
-	bool		online;
-	bool		key;
-	unsigned	gop;
-
-	long double	grab_ts;
-	long double	encode_begin_ts;
-	long double	encode_end_ts;
+	ldf		grab_ts;
+	ldf		encode_begin_ts;
+	ldf		encode_end_ts;
 } us_frame_s;
 
 
@@ -66,17 +57,16 @@ typedef struct {
 		x_dest->online = x_src->online; \
 		x_dest->key = x_src->key; \
 		x_dest->gop = x_src->gop; \
+		\
 		x_dest->grab_ts = x_src->grab_ts; \
 		x_dest->encode_begin_ts = x_src->encode_begin_ts; \
 		x_dest->encode_end_ts = x_src->encode_end_ts; \
 	}
 
-static inline void us_frame_copy_meta(const us_frame_s *src, us_frame_s *dest) {
-	US_FRAME_COPY_META(src, dest);
-}
-
-#define US_FRAME_COMPARE_META_USED_NOTS(x_a, x_b) ( \
+#define US_FRAME_COMPARE_GEOMETRY(x_a, x_b) ( \
+		/* Compare the used size and significant meta (no timings) */ \
 		x_a->used == x_b->used \
+		\
 		&& x_a->width == x_b->width \
 		&& x_a->height == x_b->height \
 		&& x_a->format == x_b->format \
@@ -87,9 +77,9 @@ static inline void us_frame_copy_meta(const us_frame_s *src, us_frame_s *dest) {
 	)
 
 
-static inline void us_frame_encoding_begin(const us_frame_s *src, us_frame_s *dest, unsigned format) {
+static inline void us_frame_encoding_begin(const us_frame_s *src, us_frame_s *dest, uint format) {
 	assert(src->used > 0);
-	us_frame_copy_meta(src, dest);
+	US_FRAME_COPY_META(src, dest);
 	dest->encode_begin_ts = us_get_now_monotonic();
 	dest->format = format;
 	dest->stride = 0;
@@ -105,17 +95,14 @@ static inline void us_frame_encoding_end(us_frame_s *dest) {
 us_frame_s *us_frame_init(void);
 void us_frame_destroy(us_frame_s *frame);
 
-void us_frame_realloc_data(us_frame_s *frame, size_t size);
-void us_frame_set_data(us_frame_s *frame, const uint8_t *data, size_t size);
-void us_frame_append_data(us_frame_s *frame, const uint8_t *data, size_t size);
+void us_frame_realloc_data(us_frame_s *frame, uz size);
+void us_frame_set_data(us_frame_s *frame, const u8 *data, uz size);
+void us_frame_append_data(us_frame_s *frame, const u8 *data, uz size);
 
 void us_frame_copy(const us_frame_s *src, us_frame_s *dest);
 bool us_frame_compare(const us_frame_s *a, const us_frame_s *b);
 
-unsigned us_frame_get_padding(const us_frame_s *frame);
+uint us_frame_get_padding(const us_frame_s *frame);
 
-const char *us_fourcc_to_string(unsigned format, char *buf, size_t size);
-
-static inline bool us_is_jpeg(unsigned format) {
-	return (format == V4L2_PIX_FMT_JPEG || format == V4L2_PIX_FMT_MJPEG);
-}
+bool us_is_jpeg(uint format);
+const char *us_fourcc_to_string(uint format, char *buf, uz size);

src/libs/frametext.c

@@ -0,0 +1,158 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2023  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 "frametext.h"
+
+#include <string.h>
+
+#include <sys/types.h>
+
+#include <linux/videodev2.h>
+
+#include "tools.h"
+#include "frame.h"
+#include "frametext_font.h"
+
+
+static void _frametext_draw_line(
+	us_frametext_s *ft, const char *line,
+	uint scale_x, uint scale_y,
+	uint start_x, uint start_y);
+
+
+us_frametext_s *us_frametext_init(void) {
+	us_frametext_s *ft;
+	US_CALLOC(ft, 1);
+	ft->frame = us_frame_init();
+	return ft;
+}
+
+void us_frametext_destroy(us_frametext_s *ft) {
+	us_frame_destroy(ft->frame);
+	US_DELETE(ft->text, free);
+	free(ft);
+}
+
+void us_frametext_draw(us_frametext_s *ft, const char *text, uint width, uint height) {
+	assert(width > 0);
+	assert(height > 0);
+
+	us_frame_s *const frame = ft->frame;
+
+	if (
+		frame->width == width && frame->height == height
+		&& ft->text != NULL && !strcmp(ft->text, text)
+	) {
+		return;
+	}
+
+	US_DELETE(ft->text, free);
+	ft->text = us_strdup(text);
+	strcpy(ft->text, text);
+	frame->width = width;
+	frame->height = height;
+	frame->format = V4L2_PIX_FMT_RGB24;
+	frame->stride = width * 3;
+	frame->used = width * height * 3;
+	us_frame_realloc_data(frame, frame->used);
+	memset(frame->data, 0, frame->used);
+
+	if (frame->width == 0 || frame->height == 0) {
+		return;
+	}
+
+	char *str = us_strdup(text);
+	char *line;
+	char *rest;
+
+	uint block_width = 0;
+	uint block_height = 0;
+	while ((line = strtok_r((block_height == 0 ? str : NULL), "\n", &rest)) != NULL) {
+		block_width = US_MAX(strlen(line) * 8, block_width);
+		block_height += 8;
+	}
+	if (block_width == 0 || block_height == 0) {
+		goto empty;
+	}
+	uint scale_x = frame->width / block_width / 2;
+	uint scale_y = frame->height / block_height / 3;
+	if (scale_x < scale_y / 1.5) {
+		scale_y = scale_x * 1.5;
+	} else if (scale_y < scale_x * 1.5) {
+		scale_x = scale_y / 1.5;
+	}
+
+	strcpy(str, text);
+
+	const uint start_y = (frame->height >= (block_height * scale_y)
+		? ((frame->height - (block_height * scale_y)) / 2)
+		: 0);
+	uint n_line = 0;
+	while ((line = strtok_r((n_line == 0 ? str : NULL), "\n", &rest)) != NULL) {
+		const uint line_width = strlen(line) * 8 * scale_x;
+		const uint start_x = (frame->width >= line_width
+			? ((frame->width - line_width) / 2)
+			: 0);
+		_frametext_draw_line(ft, line, scale_x, scale_y, start_x, start_y + n_line * 8 * scale_y);
+		++n_line;
+	}
+
+empty:
+	free(str);
+}
+
+void _frametext_draw_line(
+	us_frametext_s *ft, const char *line,
+	uint scale_x, uint scale_y,
+	uint start_x, uint start_y) {
+
+	us_frame_s *const frame = ft->frame;
+
+	const size_t len = strlen(line);
+
+	for (uint ch_y = 0; ch_y < 8 * scale_y; ++ch_y) {
+		const uint canvas_y = start_y + ch_y;
+		for (uint ch_x = 0; ch_x < 8 * len * scale_x; ++ch_x) {
+			if ((start_x + ch_x) >= frame->width) {
+				break;
+			}
+			const uint canvas_x = (start_x + ch_x) * 3;
+			const uint offset = canvas_y * frame->stride + canvas_x;
+			if (offset >= frame->used) {
+				break;
+			}
+
+			const u8 ch = US_MIN((u8)line[ch_x / 8 / scale_x], sizeof(US_FRAMETEXT_FONT) / 8 - 1);
+			const uint ch_byte = (ch_y / scale_y) % 8;
+			const uint ch_bit = (ch_x / scale_x) % 8;
+			const bool pix_on = !!(US_FRAMETEXT_FONT[ch][ch_byte] & (1 << ch_bit));
+
+			u8 *const r = &frame->data[offset];
+			u8 *const g = r + 1;
+			u8 *const b = r + 2;
+
+			*r = pix_on * 0x65; // RGB/BGR-friendly
+			*g = pix_on * 0x65;
+			*b = pix_on * 0x65;
+		}
+	}
+}

src/libs/frametext.h

@@ -0,0 +1,39 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2023  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 "types.h"
+#include "frame.h"
+
+
+typedef struct {
+	char		*text;
+	us_frame_s	*frame;
+} us_frametext_s;
+
+
+us_frametext_s *us_frametext_init(void);
+void us_frametext_destroy(us_frametext_s *ft);
+
+void us_frametext_draw(us_frametext_s *ft, const char *text, uint width, uint height);

src/libs/frametext_font.c

@@ -0,0 +1,158 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2023  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 "frametext_font.h"
+
+#include "types.h"
+
+
+const u8 US_FRAMETEXT_FONT[128][8] = {
+	// https://github.com/dhepper/font8x8/blob/master/font8x8_basic.h
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0000 (nul)
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0001
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0002
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0003
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0004
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0005
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0006
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0007
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0008
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0009
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+000A
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+000B
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+000C
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+000D
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+000E
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+000F
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0010
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0011
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0012
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0013
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0014
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0015
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0016
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0017
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0018
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0019
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+001A
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+001B
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+001C
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+001D
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+001E
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+001F
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0020 (space)
+	{0x18, 0x3C, 0x3C, 0x18, 0x18, 0x00, 0x18, 0x00}, // U+0021 (!)
+	{0x36, 0x36, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0022 (")
+	{0x36, 0x36, 0x7F, 0x36, 0x7F, 0x36, 0x36, 0x00}, // U+0023 (#)
+	{0x0C, 0x3E, 0x03, 0x1E, 0x30, 0x1F, 0x0C, 0x00}, // U+0024 ($)
+	{0x00, 0x63, 0x33, 0x18, 0x0C, 0x66, 0x63, 0x00}, // U+0025 (%)
+	{0x1C, 0x36, 0x1C, 0x6E, 0x3B, 0x33, 0x6E, 0x00}, // U+0026 (&)
+	{0x06, 0x06, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0027 (')
+	{0x18, 0x0C, 0x06, 0x06, 0x06, 0x0C, 0x18, 0x00}, // U+0028 (()
+	{0x06, 0x0C, 0x18, 0x18, 0x18, 0x0C, 0x06, 0x00}, // U+0029 ())
+	{0x00, 0x66, 0x3C, 0xFF, 0x3C, 0x66, 0x00, 0x00}, // U+002A (*)
+	{0x00, 0x0C, 0x0C, 0x3F, 0x0C, 0x0C, 0x00, 0x00}, // U+002B (+)
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x0C, 0x0C, 0x06}, // U+002C (,)
+	{0x00, 0x00, 0x00, 0x3F, 0x00, 0x00, 0x00, 0x00}, // U+002D (-)
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x0C, 0x0C, 0x00}, // U+002E (.)
+	{0x60, 0x30, 0x18, 0x0C, 0x06, 0x03, 0x01, 0x00}, // U+002F (/)
+	{0x3E, 0x63, 0x73, 0x7B, 0x6F, 0x67, 0x3E, 0x00}, // U+0030 (0)
+	{0x0C, 0x0E, 0x0C, 0x0C, 0x0C, 0x0C, 0x3F, 0x00}, // U+0031 (1)
+	{0x1E, 0x33, 0x30, 0x1C, 0x06, 0x33, 0x3F, 0x00}, // U+0032 (2)
+	{0x1E, 0x33, 0x30, 0x1C, 0x30, 0x33, 0x1E, 0x00}, // U+0033 (3)
+	{0x38, 0x3C, 0x36, 0x33, 0x7F, 0x30, 0x78, 0x00}, // U+0034 (4)
+	{0x3F, 0x03, 0x1F, 0x30, 0x30, 0x33, 0x1E, 0x00}, // U+0035 (5)
+	{0x1C, 0x06, 0x03, 0x1F, 0x33, 0x33, 0x1E, 0x00}, // U+0036 (6)
+	{0x3F, 0x33, 0x30, 0x18, 0x0C, 0x0C, 0x0C, 0x00}, // U+0037 (7)
+	{0x1E, 0x33, 0x33, 0x1E, 0x33, 0x33, 0x1E, 0x00}, // U+0038 (8)
+	{0x1E, 0x33, 0x33, 0x3E, 0x30, 0x18, 0x0E, 0x00}, // U+0039 (9)
+	{0x00, 0x0C, 0x0C, 0x00, 0x00, 0x0C, 0x0C, 0x00}, // U+003A (:)
+	{0x00, 0x0C, 0x0C, 0x00, 0x00, 0x0C, 0x0C, 0x06}, // U+003B (;)
+	{0x18, 0x0C, 0x06, 0x03, 0x06, 0x0C, 0x18, 0x00}, // U+003C (<)
+	{0x00, 0x00, 0x3F, 0x00, 0x00, 0x3F, 0x00, 0x00}, // U+003D (=)
+	{0x06, 0x0C, 0x18, 0x30, 0x18, 0x0C, 0x06, 0x00}, // U+003E (>)
+	{0x1E, 0x33, 0x30, 0x18, 0x0C, 0x00, 0x0C, 0x00}, // U+003F (?)
+	{0x3E, 0x63, 0x7B, 0x7B, 0x7B, 0x03, 0x1E, 0x00}, // U+0040 (@)
+	{0x0C, 0x1E, 0x33, 0x33, 0x3F, 0x33, 0x33, 0x00}, // U+0041 (A)
+	{0x3F, 0x66, 0x66, 0x3E, 0x66, 0x66, 0x3F, 0x00}, // U+0042 (B)
+	{0x3C, 0x66, 0x03, 0x03, 0x03, 0x66, 0x3C, 0x00}, // U+0043 (C)
+	{0x1F, 0x36, 0x66, 0x66, 0x66, 0x36, 0x1F, 0x00}, // U+0044 (D)
+	{0x7F, 0x46, 0x16, 0x1E, 0x16, 0x46, 0x7F, 0x00}, // U+0045 (E)
+	{0x7F, 0x46, 0x16, 0x1E, 0x16, 0x06, 0x0F, 0x00}, // U+0046 (F)
+	{0x3C, 0x66, 0x03, 0x03, 0x73, 0x66, 0x7C, 0x00}, // U+0047 (G)
+	{0x33, 0x33, 0x33, 0x3F, 0x33, 0x33, 0x33, 0x00}, // U+0048 (H)
+	{0x1E, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x1E, 0x00}, // U+0049 (I)
+	{0x78, 0x30, 0x30, 0x30, 0x33, 0x33, 0x1E, 0x00}, // U+004A (J)
+	{0x67, 0x66, 0x36, 0x1E, 0x36, 0x66, 0x67, 0x00}, // U+004B (K)
+	{0x0F, 0x06, 0x06, 0x06, 0x46, 0x66, 0x7F, 0x00}, // U+004C (L)
+	{0x63, 0x77, 0x7F, 0x7F, 0x6B, 0x63, 0x63, 0x00}, // U+004D (M)
+	{0x63, 0x67, 0x6F, 0x7B, 0x73, 0x63, 0x63, 0x00}, // U+004E (N)
+	{0x1C, 0x36, 0x63, 0x63, 0x63, 0x36, 0x1C, 0x00}, // U+004F (O)
+	{0x3F, 0x66, 0x66, 0x3E, 0x06, 0x06, 0x0F, 0x00}, // U+0050 (P)
+	{0x1E, 0x33, 0x33, 0x33, 0x3B, 0x1E, 0x38, 0x00}, // U+0051 (Q)
+	{0x3F, 0x66, 0x66, 0x3E, 0x36, 0x66, 0x67, 0x00}, // U+0052 (R)
+	{0x1E, 0x33, 0x07, 0x0E, 0x38, 0x33, 0x1E, 0x00}, // U+0053 (S)
+	{0x3F, 0x2D, 0x0C, 0x0C, 0x0C, 0x0C, 0x1E, 0x00}, // U+0054 (T)
+	{0x33, 0x33, 0x33, 0x33, 0x33, 0x33, 0x3F, 0x00}, // U+0055 (U)
+	{0x33, 0x33, 0x33, 0x33, 0x33, 0x1E, 0x0C, 0x00}, // U+0056 (V)
+	{0x63, 0x63, 0x63, 0x6B, 0x7F, 0x77, 0x63, 0x00}, // U+0057 (W)
+	{0x63, 0x63, 0x36, 0x1C, 0x1C, 0x36, 0x63, 0x00}, // U+0058 (X)
+	{0x33, 0x33, 0x33, 0x1E, 0x0C, 0x0C, 0x1E, 0x00}, // U+0059 (Y)
+	{0x7F, 0x63, 0x31, 0x18, 0x4C, 0x66, 0x7F, 0x00}, // U+005A (Z)
+	{0x1E, 0x06, 0x06, 0x06, 0x06, 0x06, 0x1E, 0x00}, // U+005B ([)
+	{0x03, 0x06, 0x0C, 0x18, 0x30, 0x60, 0x40, 0x00}, // U+005C (\)
+	{0x1E, 0x18, 0x18, 0x18, 0x18, 0x18, 0x1E, 0x00}, // U+005D (])
+	{0x08, 0x1C, 0x36, 0x63, 0x00, 0x00, 0x00, 0x00}, // U+005E (^)
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF}, // U+005F (_)
+	{0x0C, 0x0C, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0060 (`)
+	{0x00, 0x00, 0x1E, 0x30, 0x3E, 0x33, 0x6E, 0x00}, // U+0061 (a)
+	{0x07, 0x06, 0x06, 0x3E, 0x66, 0x66, 0x3B, 0x00}, // U+0062 (b)
+	{0x00, 0x00, 0x1E, 0x33, 0x03, 0x33, 0x1E, 0x00}, // U+0063 (c)
+	{0x38, 0x30, 0x30, 0x3e, 0x33, 0x33, 0x6E, 0x00}, // U+0064 (d)
+	{0x00, 0x00, 0x1E, 0x33, 0x3f, 0x03, 0x1E, 0x00}, // U+0065 (e)
+	{0x1C, 0x36, 0x06, 0x0f, 0x06, 0x06, 0x0F, 0x00}, // U+0066 (f)
+	{0x00, 0x00, 0x6E, 0x33, 0x33, 0x3E, 0x30, 0x1F}, // U+0067 (g)
+	{0x07, 0x06, 0x36, 0x6E, 0x66, 0x66, 0x67, 0x00}, // U+0068 (h)
+	{0x0C, 0x00, 0x0E, 0x0C, 0x0C, 0x0C, 0x1E, 0x00}, // U+0069 (i)
+	{0x30, 0x00, 0x30, 0x30, 0x30, 0x33, 0x33, 0x1E}, // U+006A (j)
+	{0x07, 0x06, 0x66, 0x36, 0x1E, 0x36, 0x67, 0x00}, // U+006B (k)
+	{0x0E, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x1E, 0x00}, // U+006C (l)
+	{0x00, 0x00, 0x33, 0x7F, 0x7F, 0x6B, 0x63, 0x00}, // U+006D (m)
+	{0x00, 0x00, 0x1F, 0x33, 0x33, 0x33, 0x33, 0x00}, // U+006E (n)
+	{0x00, 0x00, 0x1E, 0x33, 0x33, 0x33, 0x1E, 0x00}, // U+006F (o)
+	{0x00, 0x00, 0x3B, 0x66, 0x66, 0x3E, 0x06, 0x0F}, // U+0070 (p)
+	{0x00, 0x00, 0x6E, 0x33, 0x33, 0x3E, 0x30, 0x78}, // U+0071 (q)
+	{0x00, 0x00, 0x3B, 0x6E, 0x66, 0x06, 0x0F, 0x00}, // U+0072 (r)
+	{0x00, 0x00, 0x3E, 0x03, 0x1E, 0x30, 0x1F, 0x00}, // U+0073 (s)
+	{0x08, 0x0C, 0x3E, 0x0C, 0x0C, 0x2C, 0x18, 0x00}, // U+0074 (t)
+	{0x00, 0x00, 0x33, 0x33, 0x33, 0x33, 0x6E, 0x00}, // U+0075 (u)
+	{0x00, 0x00, 0x33, 0x33, 0x33, 0x1E, 0x0C, 0x00}, // U+0076 (v)
+	{0x00, 0x00, 0x63, 0x6B, 0x7F, 0x7F, 0x36, 0x00}, // U+0077 (w)
+	{0x00, 0x00, 0x63, 0x36, 0x1C, 0x36, 0x63, 0x00}, // U+0078 (x)
+	{0x00, 0x00, 0x33, 0x33, 0x33, 0x3E, 0x30, 0x1F}, // U+0079 (y)
+	{0x00, 0x00, 0x3F, 0x19, 0x0C, 0x26, 0x3F, 0x00}, // U+007A (z)
+	{0x38, 0x0C, 0x0C, 0x07, 0x0C, 0x0C, 0x38, 0x00}, // U+007B ({)
+	{0x18, 0x18, 0x18, 0x00, 0x18, 0x18, 0x18, 0x00}, // U+007C (|)
+	{0x07, 0x0C, 0x0C, 0x38, 0x0C, 0x0C, 0x07, 0x00}, // U+007D (})
+	{0x6E, 0x3B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+007E (~)
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+007F
+};

src/libs/frametext_font.h

@@ -0,0 +1,28 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2023  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 "types.h"
+
+
+extern const u8 US_FRAMETEXT_FONT[128][8];

src/libs/logging.c

@@ -22,6 +22,10 @@
 
 #include "logging.h"
 
+#include <stdbool.h>
+
+#include <pthread.h>
+
 
 enum us_log_level_t us_g_log_level;
 

src/libs/logging.h

@@ -23,7 +23,6 @@
 #pragma once
 
 #include <stdio.h>
-#include <stdbool.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
@@ -33,6 +32,7 @@
 
 #include <pthread.h>
 
+#include "types.h"
 #include "tools.h"
 #include "threading.h"
 
@@ -91,7 +91,7 @@ extern pthread_mutex_t us_g_log_mutex;
 
 
 #define US_LOG_PRINTF_NOLOCK(x_label_color, x_label, x_msg_color, x_msg, ...) { \
-		char m_tname_buf[US_MAX_THREAD_NAME] = {0}; \
+		char m_tname_buf[US_THREAD_NAME_SIZE] = {0}; \
 		us_thread_get_name(m_tname_buf); \
 		if (us_g_log_colored) { \
 			fprintf(stderr, US_COLOR_GRAY "-- " x_label_color x_label US_COLOR_GRAY \

src/libs/memsink.c

@@ -22,10 +22,26 @@
 
 #include "memsink.h"
 
+#include <stdatomic.h>
+#include <string.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <assert.h>
+
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+
+#include "types.h"
+#include "tools.h"
+#include "logging.h"
+#include "frame.h"
+#include "memsinksh.h"
+
 
 us_memsink_s *us_memsink_init(
 	const char *name, const char *obj, bool server,
-	mode_t mode, bool rm, unsigned client_ttl, unsigned timeout) {
+	mode_t mode, bool rm, uint client_ttl, uint timeout) {
 
 	us_memsink_s *sink;
 	US_CALLOC(sink, 1);
@@ -58,12 +74,11 @@ us_memsink_s *us_memsink_init(
 		US_LOG_PERROR("%s-sink: Can't mmap shared memory", name);
 		goto error;
 	}
-
 	return sink;
 
-	error:
-		us_memsink_destroy(sink);
-		return NULL;
+error:
+	us_memsink_destroy(sink);
+	return NULL;
 }
 
 void us_memsink_destroy(us_memsink_s *sink) {
@@ -86,16 +101,35 @@ void us_memsink_destroy(us_memsink_s *sink) {
 }
 
 bool us_memsink_server_check(us_memsink_s *sink, const us_frame_s *frame) {
-	// Return true (the need to write to memsink) on any of these conditions:
-	//   - EWOULDBLOCK - we have an active client;
-	//   - Incorrect magic or version - need to first write;
-	//   - We have some active clients by last_client_ts;
-	//   - Frame meta differs (like size, format, but not timestamp).
+	// Если frame == NULL, то только проверяем наличие клиентов
+	// или необходимость инициализировать память.
 
 	assert(sink->server);
 
+	if (sink->mem->magic != US_MEMSINK_MAGIC || sink->mem->version != US_MEMSINK_VERSION) {
+		// Если регион памяти не был инициализирован, то нужно что-то туда положить.
+		// Блокировка не нужна, потому что только сервер пишет в эти переменные.
+		return true;
+	}
+
+	const ldf unsafe_ts = sink->mem->last_client_ts;
+	if (unsafe_ts != sink->unsafe_last_client_ts) {
+		// Клиент пишет в синке свою отметку last_client_ts при любом действии.
+		// Мы не берем блокировку здесь, а просто проверяем, является ли это число тем же самым,
+		// что было прочитано нами в предыдущих итерациях. Значению не нужно быть консистентным,
+		// и даже если мы прочитали мусор из-за гонки в памяти между чтением здеси и записью
+		// из клиента, мы все равно можем сделать вывод, есть ли у нас клиенты вообще.
+		// Если число число поменялось то у нас точно есть клиенты и дальнейшие проверки
+		// проводить не требуется. Если же число неизменно, то стоит поставить блокировку
+		// и проверить, нужно ли записать что-нибудь в память для инициализации фрейма.
+		sink->unsafe_last_client_ts = unsafe_ts;
+		atomic_store(&sink->has_clients, true);
+		return true;
+	}
+
 	if (flock(sink->fd, LOCK_EX | LOCK_NB) < 0) {
 		if (errno == EWOULDBLOCK) {
+			// Есть живой клиент, который прямо сейчас взял блокировку и читает фрейм из синка
 			atomic_store(&sink->has_clients, true);
 			return true;
 		}
@@ -103,10 +137,7 @@ bool us_memsink_server_check(us_memsink_s *sink, const us_frame_s *frame) {
 		return false;
 	}
 
-	if (sink->mem->magic != US_MEMSINK_MAGIC || sink->mem->version != US_MEMSINK_VERSION) {
-		return true;
-	}
-
+	// Проверяем, есть ли у нас живой клиент по таймауту
 	const bool has_clients = (sink->mem->last_client_ts + sink->client_ttl > us_get_now_monotonic());
 	atomic_store(&sink->has_clients, has_clients);
 
@@ -114,13 +145,20 @@ bool us_memsink_server_check(us_memsink_s *sink, const us_frame_s *frame) {
 		US_LOG_PERROR("%s-sink: Can't unlock memory", sink->name);
 		return false;
 	}
-	return (has_clients || !US_FRAME_COMPARE_META_USED_NOTS(sink->mem, frame));;
+	if (has_clients) {
+		return true;
+	}
+	if (frame != NULL && !US_FRAME_COMPARE_GEOMETRY(sink->mem, frame)) {
+		// Если есть изменения в геометрии/формате фрейма, то их тоже нобходимо сразу записать в синк
+		return true;
+	}
+	return false;
 }
 
-int us_memsink_server_put(us_memsink_s *sink, const us_frame_s *frame, bool *const key_requested) {
+int us_memsink_server_put(us_memsink_s *sink, const us_frame_s *frame, bool *key_requested) {
 	assert(sink->server);
 
-	const long double now = us_get_now_monotonic();
+	const ldf now = us_get_now_monotonic();
 
 	if (frame->used > US_MEMSINK_MAX_DATA) {
 		US_LOG_ERROR("%s-sink: Can't put frame: is too big (%zu > %zu)",
@@ -131,12 +169,13 @@ int us_memsink_server_put(us_memsink_s *sink, const us_frame_s *frame, bool *con
 	if (us_flock_timedwait_monotonic(sink->fd, 1) == 0) {
 		US_LOG_VERBOSE("%s-sink: >>>>> Exposing new frame ...", sink->name);
 
-		sink->last_id = us_get_now_id();
-		sink->mem->id = sink->last_id;
+		sink->mem->id = us_get_now_id();
 		if (sink->mem->key_requested && frame->key) {
 			sink->mem->key_requested = false;
 		}
-		*key_requested = sink->mem->key_requested;
+		if (key_requested != NULL) { // We don't need it for non-H264 sinks
+			*key_requested = sink->mem->key_requested;
+		}
 
 		memcpy(sink->mem->data, frame->data, frame->used);
 		sink->mem->used = frame->used;
@@ -164,7 +203,7 @@ int us_memsink_server_put(us_memsink_s *sink, const us_frame_s *frame, bool *con
 	return 0;
 }
 
-int us_memsink_client_get(us_memsink_s *sink, us_frame_s *frame, bool *const key_requested, bool key_required) { // cppcheck-suppress unusedFunction
+int us_memsink_client_get(us_memsink_s *sink, us_frame_s *frame, bool *key_requested, bool key_required) {
 	assert(!sink->server); // Client only
 
 	if (us_flock_timedwait_monotonic(sink->fd, sink->timeout) < 0) {
@@ -175,31 +214,41 @@ int us_memsink_client_get(us_memsink_s *sink, us_frame_s *frame, bool *const key
 		return -1;
 	}
 
-	int retval = -2; // Not updated
-	if (sink->mem->magic == US_MEMSINK_MAGIC) {
-		if (sink->mem->version != US_MEMSINK_VERSION) {
-			US_LOG_ERROR("%s-sink: Protocol version mismatch: sink=%u, required=%u",
-				sink->name, sink->mem->version, US_MEMSINK_VERSION);
-			retval = -1;
-			goto done;
-		}
-		if (sink->mem->id != sink->last_id) { // When updated
-			sink->last_id = sink->mem->id;
-			us_frame_set_data(frame, sink->mem->data, sink->mem->used);
-			US_FRAME_COPY_META(sink->mem, frame);
-			*key_requested = sink->mem->key_requested;
-			retval = 0;
-		}
-		sink->mem->last_client_ts = us_get_now_monotonic();
-		if (key_required) {
-			sink->mem->key_requested = true;
-		}
+	int retval = 0;
+
+	if (sink->mem->magic != US_MEMSINK_MAGIC) {
+		retval = -2; // Not updated
+		goto done;
+	}
+	if (sink->mem->version != US_MEMSINK_VERSION) {
+		US_LOG_ERROR("%s-sink: Protocol version mismatch: sink=%u, required=%u",
+			sink->name, sink->mem->version, US_MEMSINK_VERSION);
+		retval = -1;
+		goto done;
 	}
 
-	done:
-		if (flock(sink->fd, LOCK_UN) < 0) {
-			US_LOG_PERROR("%s-sink: Can't unlock memory", sink->name);
-			return -1;
-		}
-		return retval;
+	// Let the sink know that the client is alive
+	sink->mem->last_client_ts = us_get_now_monotonic();
+
+	if (sink->mem->id == sink->last_readed_id) {
+		retval = -2; // Not updated
+		goto done;
+	}
+
+	sink->last_readed_id = sink->mem->id;
+	us_frame_set_data(frame, sink->mem->data, sink->mem->used);
+	US_FRAME_COPY_META(sink->mem, frame);
+	if (key_requested != NULL) { // We don't need it for non-H264 sinks
+		*key_requested = sink->mem->key_requested;
+	}
+	if (key_required) {
+		sink->mem->key_requested = true;
+	}
+
+done:
+	if (flock(sink->fd, LOCK_UN) < 0) {
+		US_LOG_PERROR("%s-sink: Can't unlock memory", sink->name);
+		retval = -1;
+	}
+	return retval;
 }

src/libs/memsink.h

@@ -22,47 +22,40 @@
 
 #pragma once
 
-#include <stdint.h>
-#include <stdbool.h>
 #include <stdatomic.h>
-#include <string.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <assert.h>
 
-#include <sys/types.h>
-#include <sys/file.h>
 #include <sys/stat.h>
-#include <sys/mman.h>
 
-#include "tools.h"
-#include "logging.h"
+#include "types.h"
 #include "frame.h"
 #include "memsinksh.h"
 
 
 typedef struct {
-	const char			*name;
-	const char			*obj;
-	bool				server;
-	bool				rm;
-	unsigned			client_ttl; // Only for server
-	unsigned			timeout;
+	const char	*name;
+	const char	*obj;
+	bool		server;
+	bool		rm;
+	uint		client_ttl; // Only for server
+	uint		timeout;
 
 	int					fd;
 	us_memsink_shared_s	*mem;
-	uint64_t			last_id;
-	atomic_bool			has_clients; // Only for server
+
+	u64			last_readed_id; // Only for client
+
+	atomic_bool	has_clients; // Only for server results
+	ldf			unsafe_last_client_ts; // Only for server
 } us_memsink_s;
 
 
 us_memsink_s *us_memsink_init(
 	const char *name, const char *obj, bool server,
-	mode_t mode, bool rm, unsigned client_ttl, unsigned timeout);
+	mode_t mode, bool rm, uint client_ttl, uint timeout);
 
 void us_memsink_destroy(us_memsink_s *sink);
 
 bool us_memsink_server_check(us_memsink_s *sink, const us_frame_s *frame);
-int us_memsink_server_put(us_memsink_s *sink, const us_frame_s *frame, bool *const key_requested);
+int us_memsink_server_put(us_memsink_s *sink, const us_frame_s *frame, bool *key_requested);
 
-int us_memsink_client_get(us_memsink_s *sink, us_frame_s *frame, bool *const key_requested, bool key_required);
+int us_memsink_client_get(us_memsink_s *sink, us_frame_s *frame, bool *key_requested, bool key_required);

src/libs/memsinksh.h

@@ -22,45 +22,43 @@
 
 #pragma once
 
-#include <stdint.h>
-#include <stdbool.h>
-
-#include <sys/types.h>
 #include <sys/mman.h>
 
+#include "types.h"
 
-#define US_MEMSINK_MAGIC	((uint64_t)0xCAFEBABECAFEBABE)
-#define US_MEMSINK_VERSION	((uint32_t)4)
+
+#define US_MEMSINK_MAGIC	((u64)0xCAFEBABECAFEBABE)
+#define US_MEMSINK_VERSION	((u32)4)
 
 #ifndef US_CFG_MEMSINK_MAX_DATA
 #	define US_CFG_MEMSINK_MAX_DATA 33554432
 #endif
-#define US_MEMSINK_MAX_DATA ((size_t)(US_CFG_MEMSINK_MAX_DATA))
+#define US_MEMSINK_MAX_DATA ((uz)(US_CFG_MEMSINK_MAX_DATA))
 
 
 typedef struct {
-	uint64_t	magic;
-	uint32_t	version;
+	u64		magic;
+	u32		version;
 
-	uint64_t	id;
+	u64		id;
 
-	size_t		used;
-	unsigned	width;
-	unsigned	height;
-	unsigned	format;
-	unsigned	stride;
-	bool		online;
-	bool		key;
-	unsigned	gop;
+	uz		used;
+	uint	width;
+	uint	height;
+	uint	format;
+	uint	stride;
+	bool	online;
+	bool	key;
+	uint	gop;
 
-	long double	grab_ts;
-	long double	encode_begin_ts;
-	long double	encode_end_ts;
+	ldf		grab_ts;
+	ldf		encode_begin_ts;
+	ldf		encode_end_ts;
 
-	long double	last_client_ts;
-	bool		key_requested;
+	ldf		last_client_ts;
+	bool	key_requested;
 
-	uint8_t		data[US_MEMSINK_MAX_DATA];
+	u8		data[US_MEMSINK_MAX_DATA];
 } us_memsink_shared_s;
 
 

src/libs/options.c

@@ -22,10 +22,17 @@
 
 #include "options.h"
 
+#include <string.h>
+#include <ctype.h>
+#include <getopt.h>
+#include <assert.h>
 
-void us_build_short_options(const struct option opts[], char *short_opts, size_t size) {
+#include "types.h"
+
+
+void us_build_short_options(const struct option opts[], char *short_opts, uz size) {
 	memset(short_opts, 0, size);
-    for (unsigned short_index = 0, opt_index = 0; opts[opt_index].name != NULL; ++opt_index) {
+    for (uint short_index = 0, opt_index = 0; opts[opt_index].name != NULL; ++opt_index) {
 		assert(short_index < size - 3);
         if (isalpha(opts[opt_index].val)) {
             short_opts[short_index] = opts[opt_index].val;

src/libs/options.h

@@ -22,12 +22,9 @@
 
 #pragma once
 
-#include <string.h>
-#include <ctype.h>
 #include <getopt.h>
-#include <assert.h>
 
-#include <sys/types.h>
+#include "types.h"
 
 
-void us_build_short_options(const struct option opts[], char *short_opts, size_t size);
+void us_build_short_options(const struct option opts[], char *short_opts, uz size);

src/libs/process.h

@@ -25,8 +25,6 @@
 #include <signal.h>
 #include <unistd.h>
 
-#include <sys/types.h>
-
 
 #if defined(__linux__)
 #	define HAS_PDEATHSIG
@@ -58,6 +56,7 @@
 #		include <sys/procctl.h>
 #	endif
 #endif
+#include "types.h"
 #ifdef WITH_SETPROCTITLE
 #	include "tools.h"
 #endif
@@ -102,14 +101,14 @@ INLINE void us_process_set_name_prefix(int argc, char *argv[], const char *prefi
 #	pragma GCC diagnostic pop
 
 	char *cmdline = NULL;
-	size_t allocated = 2048;
-	size_t used = 0;
+	uz allocated = 2048;
+	uz used = 0;
 
 	US_REALLOC(cmdline, allocated);
 	cmdline[0] = '\0';
 
 	for (int index = 0; index < argc; ++index) {
-		size_t arg_len = strlen(argv[index]);
+		uz arg_len = strlen(argv[index]);
 		if (used + arg_len + 16 >= allocated) {
 			allocated += arg_len + 2048;
 			US_REALLOC(cmdline, allocated); // cppcheck-suppress memleakOnRealloc // False-positive (ok with assert)

src/libs/queue.c

@@ -22,8 +22,18 @@
 
 #include "queue.h"
 
+#include <errno.h>
+#include <time.h>
+#include <assert.h>
 
-us_queue_s *us_queue_init(unsigned capacity) {
+#include <pthread.h>
+
+#include "types.h"
+#include "tools.h"
+#include "threading.h"
+
+
+us_queue_s *us_queue_init(uint capacity) {
 	us_queue_s *queue;
 	US_CALLOC(queue, 1);
 	US_CALLOC(queue->items, capacity);
@@ -61,7 +71,7 @@ void us_queue_destroy(us_queue_s *queue) {
 		} \
 	}
 
-int us_queue_put(us_queue_s *queue, void *item, long double timeout) {
+int us_queue_put(us_queue_s *queue, void *item, ldf timeout) {
 	US_MUTEX_LOCK(queue->mutex);
 	if (timeout == 0) {
 		if (queue->size == queue->capacity) {
@@ -80,7 +90,7 @@ int us_queue_put(us_queue_s *queue, void *item, long double timeout) {
 	return 0;
 }
 
-int us_queue_get(us_queue_s *queue, void **item, long double timeout) {
+int us_queue_get(us_queue_s *queue, void **item, ldf timeout) {
 	US_MUTEX_LOCK(queue->mutex);
 	_WAIT_OR_UNLOCK(queue->size == 0, queue->empty_cond);
 	*item = queue->items[queue->out];
@@ -94,9 +104,9 @@ int us_queue_get(us_queue_s *queue, void **item, long double timeout) {
 
 #undef _WAIT_OR_UNLOCK
 
-int us_queue_get_free(us_queue_s *queue) {
+bool us_queue_is_empty(us_queue_s *queue) {
 	US_MUTEX_LOCK(queue->mutex);
-	const unsigned size = queue->size;
+	const uint size = queue->size;
 	US_MUTEX_UNLOCK(queue->mutex);
-	return queue->capacity - size;
+	return (bool)(queue->capacity - size);
 }

src/libs/queue.h

@@ -22,24 +22,20 @@
 
 #pragma once
 
-#include <errno.h>
-#include <time.h>
-#include <assert.h>
-
 #include <pthread.h>
 
-#include "uslibs/tools.h"
-#include "uslibs/threading.h"
+#include "types.h"
+#include "tools.h"
 
 
 // Based on https://github.com/seifzadeh/c-pthread-queue/blob/master/queue.h
 
 typedef struct {
 	void			**items;
-	unsigned		size;
-	unsigned		capacity;
-	unsigned		in;
-	unsigned		out;
+	uint			size;
+	uint			capacity;
+	uint			in;
+	uint			out;
 
 	pthread_mutex_t	mutex;
 	pthread_cond_t	full_cond;
@@ -49,7 +45,7 @@ typedef struct {
 
 #define US_QUEUE_DELETE_WITH_ITEMS(x_queue, x_free_item) { \
 		if (x_queue) { \
-			while (!us_queue_get_free(x_queue)) { \
+			while (!us_queue_is_empty(x_queue)) { \
 				void *m_ptr; \
 				if (!us_queue_get(x_queue, &m_ptr, 0)) { \
 					US_DELETE(m_ptr, x_free_item); \
@@ -60,9 +56,9 @@ typedef struct {
 	}
 
 
-us_queue_s *us_queue_init(unsigned capacity);
+us_queue_s *us_queue_init(uint capacity);
 void us_queue_destroy(us_queue_s *queue);
 
-int us_queue_put(us_queue_s *queue, void *item, long double timeout);
-int us_queue_get(us_queue_s *queue, void **item, long double timeout);
-int us_queue_get_free(us_queue_s *queue);
+int us_queue_put(us_queue_s *queue, void *item, ldf timeout);
+int us_queue_get(us_queue_s *queue, void **item, ldf timeout);
+bool us_queue_is_empty(us_queue_s *queue);

src/libs/ring.c

@@ -0,0 +1,86 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2023  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#include <assert.h>
+
+#include "ring.h"
+
+#include "types.h"
+#include "tools.h"
+#include "queue.h"
+
+
+int _acquire(us_ring_s *ring, us_queue_s *queue, ldf timeout);
+void _release(us_ring_s *ring, us_queue_s *queue, uint index);
+
+
+us_ring_s *us_ring_init(uint capacity) {
+	us_ring_s *ring;
+	US_CALLOC(ring, 1);
+	US_CALLOC(ring->items, capacity);
+	US_CALLOC(ring->places, capacity);
+	ring->capacity = capacity;
+	ring->producer = us_queue_init(capacity);
+	ring->consumer = us_queue_init(capacity);
+	for (uint index = 0; index < capacity; ++index) {
+		ring->places[index] = index; // XXX: Just to avoid casting between pointer and uint
+		assert(!us_queue_put(ring->producer, (void*)(ring->places + index), 0));
+	}
+	return ring;
+}
+
+void us_ring_destroy(us_ring_s *ring) {
+	us_queue_destroy(ring->consumer);
+	us_queue_destroy(ring->producer);
+	free(ring->places);
+	free(ring->items);
+	free(ring);
+}
+
+int us_ring_producer_acquire(us_ring_s *ring, ldf timeout) {
+	return _acquire(ring, ring->producer, timeout);
+}
+
+void us_ring_producer_release(us_ring_s *ring, uint index) {
+	_release(ring, ring->consumer, index);
+}
+
+int us_ring_consumer_acquire(us_ring_s *ring, ldf timeout) {
+	return _acquire(ring, ring->consumer, timeout);
+}
+
+void us_ring_consumer_release(us_ring_s *ring, uint index) {
+	_release(ring, ring->producer, index);
+}
+
+int _acquire(us_ring_s *ring, us_queue_s *queue, ldf timeout) {
+	(void)ring;
+	uint *place;
+	if (us_queue_get(queue, (void**)&place, timeout) < 0) {
+		return -1;
+	}
+	return *place;
+}
+
+void _release(us_ring_s *ring, us_queue_s *queue, uint index) {
+	assert(!us_queue_put(queue, (void*)(ring->places + index), 0));
+}

src/libs/ring.h

@@ -0,0 +1,63 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2023  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 "types.h"
+#include "queue.h"
+
+
+typedef struct {
+	uz			capacity;
+	void		**items;
+	uint		*places;
+	us_queue_s	*producer;
+	us_queue_s	*consumer;
+} us_ring_s;
+
+
+#define US_RING_INIT_WITH_ITEMS(x_ring, x_capacity, x_init_item) { \
+		(x_ring) = us_ring_init(x_capacity); \
+		for (uz m_index = 0; m_index < (x_ring)->capacity; ++m_index) { \
+			(x_ring)->items[m_index] = x_init_item(); \
+		} \
+	}
+
+#define US_RING_DELETE_WITH_ITEMS(x_ring, x_destroy_item) { \
+		if (x_ring) { \
+			for (uz m_index = 0; m_index < (x_ring)->capacity; ++m_index) { \
+				x_destroy_item((x_ring)->items[m_index]); \
+			} \
+			us_ring_destroy(x_ring); \
+		} \
+	}
+
+
+us_ring_s *us_ring_init(uint capacity);
+void us_ring_destroy(us_ring_s *ring);
+
+int us_ring_producer_acquire(us_ring_s *ring, ldf timeout);
+void us_ring_producer_release(us_ring_s *ring, uint index);
+
+int us_ring_consumer_acquire(us_ring_s *ring, ldf timeout);
+void us_ring_consumer_release(us_ring_s *ring, uint index);

src/libs/signal.c

@@ -0,0 +1,82 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2023  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 "signal.h"
+
+#include <string.h>
+#include <signal.h>
+#include <assert.h>
+
+#if defined(__GLIBC__) && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 32
+#	define HAS_SIGABBREV_NP
+#endif
+
+#include "types.h"
+#include "tools.h"
+#include "logging.h"
+
+
+char *us_signum_to_string(int signum) {
+#	ifdef HAS_SIGABBREV_NP
+	const char *const name = sigabbrev_np(signum);
+#	else
+	const char *const name = (
+		signum == SIGTERM ? "TERM" :
+		signum == SIGINT ? "INT" :
+		signum == SIGPIPE ? "PIPE" :
+		NULL
+	);
+#	endif
+	char *buf;
+	if (name != NULL) {
+		US_ASPRINTF(buf, "SIG%s", name);
+	} else {
+		US_ASPRINTF(buf, "SIG[%d]", signum);
+	}
+	return buf;
+}
+
+void us_install_signals_handler(us_signal_handler_f handler, bool ignore_sigpipe) {
+	struct sigaction sig_act = {0};
+
+	assert(!sigemptyset(&sig_act.sa_mask));
+	sig_act.sa_handler = handler;
+	assert(!sigaddset(&sig_act.sa_mask, SIGINT));
+	assert(!sigaddset(&sig_act.sa_mask, SIGTERM));
+	if (!ignore_sigpipe) {
+	    assert(!sigaddset(&sig_act.sa_mask, SIGPIPE));
+	}
+
+	US_LOG_DEBUG("Installing SIGINT handler ...");
+	assert(!sigaction(SIGINT, &sig_act, NULL));
+
+	US_LOG_DEBUG("Installing SIGTERM handler ...");
+	assert(!sigaction(SIGTERM, &sig_act, NULL));
+
+	if (!ignore_sigpipe) {
+		US_LOG_DEBUG("Installing SIGPIPE handler ...");
+		assert(!sigaction(SIGPIPE, &sig_act, NULL));
+	} else {
+		US_LOG_DEBUG("Ignoring SIGPIPE ...");
+		assert(signal(SIGPIPE, SIG_IGN) != SIG_ERR);
+	}
+}

src/libs/signal.h

@@ -22,13 +22,11 @@
 
 #pragma once
 
-#include <stdint.h>
-
-#include <sys/types.h>
+#include "types.h"
 
 
-extern const unsigned US_BLANK_JPEG_WIDTH;
-extern const unsigned US_BLANK_JPEG_HEIGHT;
+typedef void (*us_signal_handler_f)(int);
 
-extern const size_t US_BLANK_JPEG_DATA_SIZE;
-extern const uint8_t US_BLANK_JPEG_DATA[];
+
+char *us_signum_to_string(int signum);
+void us_install_signals_handler(us_signal_handler_f handler, bool ignore_sigpipe);

src/libs/threading.h

@@ -24,9 +24,9 @@
 
 #include <stdio.h>
 #include <unistd.h>
+#include <signal.h>
 #include <assert.h>
 
-#include <sys/types.h>
 #include <sys/syscall.h>
 
 #include <pthread.h>
@@ -37,13 +37,14 @@
 #	endif
 #endif
 
+#include "types.h"
 #include "tools.h"
 
 
 #ifdef PTHREAD_MAX_NAMELEN_NP
-#	define US_MAX_THREAD_NAME ((size_t)(PTHREAD_MAX_NAMELEN_NP))
+#	define US_THREAD_NAME_SIZE ((uz)(PTHREAD_MAX_NAMELEN_NP))
 #else
-#	define US_MAX_THREAD_NAME ((size_t)16)
+#	define US_THREAD_NAME_SIZE ((uz)16)
 #endif
 
 #define US_THREAD_CREATE(x_tid, x_func, x_arg)	assert(!pthread_create(&(x_tid), NULL, (x_func), (x_arg)))
@@ -51,14 +52,19 @@
 
 #ifdef WITH_PTHREAD_NP
 #	define US_THREAD_RENAME(x_fmt, ...) { \
-			char m_new_tname_buf[US_MAX_THREAD_NAME] = {0}; \
-			assert(snprintf(m_new_tname_buf, US_MAX_THREAD_NAME, (x_fmt), ##__VA_ARGS__) > 0); \
+			char m_new_tname_buf[US_THREAD_NAME_SIZE] = {0}; \
+			US_SNPRINTF(m_new_tname_buf, (US_THREAD_NAME_SIZE - 1), (x_fmt), ##__VA_ARGS__); \
 			us_thread_set_name(m_new_tname_buf); \
 		}
 #else
-#	define US_THREAD_RENAME(_fmt, ...)
+#	define US_THREAD_RENAME(x_fmt, ...)
 #endif
 
+#define US_THREAD_SETTLE(x_fmt, ...) { \
+		US_THREAD_RENAME((x_fmt), ##__VA_ARGS__); \
+		us_thread_block_signals(); \
+	}
+
 #define US_MUTEX_INIT(x_mutex)		assert(!pthread_mutex_init(&(x_mutex), NULL))
 #define US_MUTEX_DESTROY(x_mutex)	assert(!pthread_mutex_destroy(&(x_mutex)))
 #define US_MUTEX_LOCK(x_mutex)		assert(!pthread_mutex_lock(&(x_mutex)))
@@ -89,12 +95,12 @@ INLINE void us_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, US_MAX_THREAD_NAME);
+	retval = pthread_getname_np(pthread_self(), name, US_THREAD_NAME_SIZE - 1);
 #	elif \
 		(defined(__FreeBSD__) && defined(__FreeBSD_version) && __FreeBSD_version >= 1103500) \
 		|| (defined(__OpenBSD__) && defined(OpenBSD) && OpenBSD >= 201905) \
 		|| defined(__DragonFly__)
-	pthread_get_name_np(pthread_self(), name, US_MAX_THREAD_NAME);
+	pthread_get_name_np(pthread_self(), name, US_THREAD_NAME_SIZE - 1);
 	if (name[0] != '\0') {
 		retval = 0;
 	}
@@ -118,9 +124,17 @@ INLINE void us_thread_get_name(char *name) { // Always required for logging
 		const pid_t tid = 0; // Makes cppcheck happy
 #	warning gettid() not implemented
 #endif
-		assert(snprintf(name, US_MAX_THREAD_NAME, "tid=%d", tid) > 0);
+		US_SNPRINTF(name, (US_THREAD_NAME_SIZE - 1), "tid=%d", tid);
 
 #ifdef WITH_PTHREAD_NP
 	}
 #endif
 }
+
+INLINE void us_thread_block_signals(void) {
+	sigset_t mask;
+	assert(!sigemptyset(&mask));
+	assert(!sigaddset(&mask, SIGINT));
+	assert(!sigaddset(&mask, SIGTERM));
+	assert(!pthread_sigmask(SIG_BLOCK, &mask, NULL));
+}

src/libs/tools.h

@@ -23,26 +23,19 @@
 #pragma once
 
 #include <stdio.h>
-#include <stdint.h>
 #include <stdlib.h>
-#include <stdbool.h>
 #include <string.h>
 #include <unistd.h>
 #include <limits.h>
-#include <locale.h>
+#include <locale.h> // Make C locale for strerror_l()
 #include <errno.h>
 #include <math.h>
 #include <time.h>
 #include <assert.h>
 
-#include <sys/types.h>
 #include <sys/file.h>
 
-#if defined(__GLIBC__) && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 32
-#	define HAS_SIGABBREV_NP
-#else
-#	include <signal.h>
-#endif
+#include "types.h"
 
 
 #ifdef NDEBUG
@@ -57,14 +50,27 @@
 #define RN "\r\n"
 
 #define INLINE inline __attribute__((always_inline))
-#define UNUSED __attribute__((unused))
 
 #define US_CALLOC(x_dest, x_nmemb)		assert(((x_dest) = calloc((x_nmemb), sizeof(*(x_dest)))) != NULL)
 #define US_REALLOC(x_dest, x_nmemb)		assert(((x_dest) = realloc((x_dest), (x_nmemb) * sizeof(*(x_dest)))) != NULL)
-#define US_DELETE(x_dest, x_free)		{ if (x_dest) { x_free(x_dest); } }
+#define US_DELETE(x_dest, x_free)		{ if (x_dest) { x_free(x_dest); x_dest = NULL; } }
+#define US_CLOSE_FD(x_dest)				{ if (x_dest >= 0) { close(x_dest); x_dest = -1; } }
 #define US_MEMSET_ZERO(x_obj)			memset(&(x_obj), 0, sizeof(x_obj))
 
-#define US_ASPRINTF(x_dest, x_fmt, ...) assert(asprintf(&(x_dest), (x_fmt), ##__VA_ARGS__) >= 0)
+#define US_SNPRINTF(x_dest, x_size, x_fmt, ...)	assert(snprintf((x_dest), (x_size), (x_fmt), ##__VA_ARGS__) > 0)
+#define US_ASPRINTF(x_dest, x_fmt, ...)			assert(asprintf(&(x_dest), (x_fmt), ##__VA_ARGS__) > 0)
+
+#define US_MIN(x_a, x_b) ({ \
+		__typeof__(x_a) m_a = (x_a); \
+		__typeof__(x_b) m_b = (x_b); \
+		(m_a < m_b ? m_a : m_b); \
+	})
+
+#define US_MAX(x_a, x_b) ({ \
+		__typeof__(x_a) m_a = (x_a); \
+		__typeof__(x_b) m_b = (x_b); \
+		(m_a > m_b ? m_a : m_b); \
+	})
 
 
 INLINE char *us_strdup(const char *str) {
@@ -77,23 +83,15 @@ INLINE const char *us_bool_to_string(bool flag) {
 	return (flag ? "true" : "false");
 }
 
-INLINE size_t us_align_size(size_t size, size_t to) {
+INLINE uz us_align_size(uz size, uz to) {
 	return ((size + (to - 1)) & ~(to - 1));
 }
 
-INLINE unsigned us_min_u(unsigned a, unsigned b) {
-	return (a < b ? a : b);
+INLINE sll us_floor_ms(ldf now) {
+	return (sll)now - (now < (sll)now); // floor()
 }
 
-INLINE unsigned us_max_u(unsigned a, unsigned b) {
-	return (a > b ? a : b);
-}
-
-INLINE long long us_floor_ms(long double now) {
-	return (long long)now - (now < (long long)now); // floor()
-}
-
-INLINE uint32_t us_triple_u32(uint32_t x) {
+INLINE u32 us_triple_u32(u32 x) {
 	// https://nullprogram.com/blog/2018/07/31/
 	x ^= x >> 17;
 	x *= UINT32_C(0xED5AD4BB);
@@ -117,38 +115,38 @@ INLINE void us_get_now(clockid_t clk_id, time_t *sec, long *msec) {
 	}
 }
 
-INLINE long double us_get_now_monotonic(void) {
+INLINE ldf us_get_now_monotonic(void) {
 	time_t sec;
 	long msec;
 	us_get_now(CLOCK_MONOTONIC, &sec, &msec);
-	return (long double)sec + ((long double)msec) / 1000;
+	return (ldf)sec + ((ldf)msec) / 1000;
 }
 
-INLINE uint64_t us_get_now_monotonic_u64(void) {
+INLINE u64 us_get_now_monotonic_u64(void) {
 	struct timespec ts;
 	assert(!clock_gettime(CLOCK_MONOTONIC, &ts));
-	return (uint64_t)(ts.tv_nsec / 1000) + (uint64_t)ts.tv_sec * 1000000;
+	return (u64)(ts.tv_nsec / 1000) + (u64)ts.tv_sec * 1000000;
 }
 
-INLINE uint64_t us_get_now_id(void) {
-	const uint64_t now = us_get_now_monotonic_u64();
-	return (uint64_t)us_triple_u32(now) | ((uint64_t)us_triple_u32(now + 12345) << 32);
+INLINE u64 us_get_now_id(void) {
+	const u64 now = us_get_now_monotonic_u64();
+	return (u64)us_triple_u32(now) | ((u64)us_triple_u32(now + 12345) << 32);
 }
 
-INLINE long double us_get_now_real(void) {
+INLINE ldf us_get_now_real(void) {
 	time_t sec;
 	long msec;
 	us_get_now(CLOCK_REALTIME, &sec, &msec);
-	return (long double)sec + ((long double)msec) / 1000;
+	return (ldf)sec + ((ldf)msec) / 1000;
 }
 
-INLINE unsigned us_get_cores_available(void) {
+INLINE uint us_get_cores_available(void) {
 	long cores_sysconf = sysconf(_SC_NPROCESSORS_ONLN);
 	cores_sysconf = (cores_sysconf < 0 ? 0 : cores_sysconf);
-	return us_max_u(us_min_u(cores_sysconf, 4), 1);
+	return US_MAX(US_MIN(cores_sysconf, 4), 1);
 }
 
-INLINE void us_ld_to_timespec(long double ld, struct timespec *ts) {
+INLINE void us_ld_to_timespec(ldf ld, struct timespec *ts) {
 	ts->tv_sec = (long)ld;
 	ts->tv_nsec = (ld - ts->tv_sec) * 1000000000L;
 	if (ts->tv_nsec > 999999999L) {
@@ -157,12 +155,12 @@ INLINE void us_ld_to_timespec(long double ld, struct timespec *ts) {
 	}
 }
 
-INLINE long double us_timespec_to_ld(const struct timespec *ts) {
-	return ts->tv_sec + ((long double)ts->tv_nsec) / 1000000000;
+INLINE ldf us_timespec_to_ld(const struct timespec *ts) {
+	return ts->tv_sec + ((ldf)ts->tv_nsec) / 1000000000;
 }
 
-INLINE int us_flock_timedwait_monotonic(int fd, long double timeout) {
-	const long double deadline_ts = us_get_now_monotonic() + timeout;
+INLINE int us_flock_timedwait_monotonic(int fd, ldf timeout) {
+	const ldf deadline_ts = us_get_now_monotonic() + timeout;
 	int retval = -1;
 
 	while (true) {
@@ -178,33 +176,26 @@ INLINE int us_flock_timedwait_monotonic(int fd, long double timeout) {
 }
 
 INLINE char *us_errno_to_string(int error) {
-	locale_t locale = newlocale(LC_MESSAGES_MASK, "C", NULL);
-	char *buf;
-	if (locale) {
-		buf = us_strdup(strerror_l(error, locale));
-		freelocale(locale);
-	} else {
-		buf = us_strdup("!!! newlocale() error !!!");
+#	if (_POSIX_C_SOURCE >= 200112L) && !defined(_GNU_SOURCE) // XSI
+	char buf[2048];
+	const uz max_len = sizeof(buf) - 1;
+	if (strerror_r(error, buf, max_len) != 0) {
+		US_SNPRINTF(buf, max_len, "Errno = %d", error);
 	}
-	return buf;
-}
+	return us_strdup(buf);
 
-INLINE char *us_signum_to_string(int signum) {
-#	ifdef HAS_SIGABBREV_NP
-	const char *const name = sigabbrev_np(signum);
-#	else
-	const char *const name = (
-		signum == SIGTERM ? "TERM" :
-		signum == SIGINT ? "INT" :
-		signum == SIGPIPE ? "PIPE" :
-		NULL
-	);
-#	endif
-	char *buf;
-	if (name != NULL) {
-		US_ASPRINTF(buf, "SIG%s", name);
-	} else {
-		US_ASPRINTF(buf, "SIG[%d]", signum);
+#	elif defined(__GLIBC__) && defined(_GNU_SOURCE) // GNU
+	char buf[2048];
+	const uz max_len = sizeof(buf) - 1;
+	return us_strdup(strerror_r(error, buf, max_len));
+
+#	else // BSD
+	locale_t locale = newlocale(LC_MESSAGES_MASK, "C", NULL);
+	if (locale) {
+		char *ptr = us_strdup(strerror_l(error, locale));
+		freelocale(locale);
+		return ptr;
 	}
-	return buf;
+	return us_strdup("!!! newlocale() error !!!");
+#	endif
 }

src/libs/types.h

@@ -0,0 +1,44 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2023  Maxim Devaev <mdevaev@gmail.com>               #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+#pragma once
+
+#include <stdio.h>
+#include <stdbool.h>
+#include <stdint.h>
+
+
+typedef long long sll;
+typedef ssize_t sz;
+typedef int8_t s8;
+typedef int16_t s16;
+typedef int32_t s32;
+typedef int64_t s64;
+
+typedef unsigned uint;
+typedef unsigned long long ull;
+typedef size_t uz;
+typedef uint8_t u8;
+typedef uint16_t u16;
+typedef uint32_t u32;
+typedef uint64_t u64;
+
+typedef long double ldf;

src/libs/unjpeg.c

@@ -22,6 +22,17 @@
 
 #include "unjpeg.h"
 
+#include <stdio.h>
+#include <setjmp.h>
+#include <assert.h>
+
+#include <jpeglib.h>
+#include <linux/videodev2.h>
+
+#include "types.h"
+#include "logging.h"
+#include "frame.h"
+
 
 typedef struct {
 	struct jpeg_error_mgr	mgr; // Default manager
@@ -43,7 +54,7 @@ int us_unjpeg(const us_frame_s *src, us_frame_s *dest, bool decode) {
 
 	// https://stackoverflow.com/questions/19857766/error-handling-in-libjpeg
 	_jpeg_error_manager_s jpeg_error;
-	jpeg.err = jpeg_std_error((struct jpeg_error_mgr *)&jpeg_error);
+	jpeg.err = jpeg_std_error((struct jpeg_error_mgr*)&jpeg_error);
 	jpeg_error.mgr.error_exit = _jpeg_error_handler;
 	jpeg_error.frame = src;
 	if (setjmp(jpeg_error.jmp) < 0) {
@@ -57,12 +68,12 @@ int us_unjpeg(const us_frame_s *src, us_frame_s *dest, bool decode) {
 
 	jpeg_start_decompress(&jpeg);
 
-	us_frame_copy_meta(src, dest);
-	dest->format = V4L2_PIX_FMT_RGB24;
-	dest->width = jpeg.output_width;
-	dest->height = jpeg.output_height;
-	dest->stride = jpeg.output_width * jpeg.output_components; // Row stride
-	dest->used = 0;
+	US_FRAME_COPY_META(src, dest); // cppcheck-suppress redundantAssignment
+	dest->format = V4L2_PIX_FMT_RGB24; // cppcheck-suppress redundantAssignment
+	dest->width = jpeg.output_width; // cppcheck-suppress redundantAssignment
+	dest->height = jpeg.output_height; // cppcheck-suppress redundantAssignment
+	dest->stride = jpeg.output_width * jpeg.output_components; // cppcheck-suppress redundantAssignment
+	dest->used = 0; // cppcheck-suppress redundantAssignment
 
 	if (decode) {
 		JSAMPARRAY scanlines;
@@ -77,13 +88,13 @@ int us_unjpeg(const us_frame_s *src, us_frame_s *dest, bool decode) {
 		jpeg_finish_decompress(&jpeg);
 	}
 
-	done:
-		jpeg_destroy_decompress(&jpeg);
-		return retval;
+done:
+	jpeg_destroy_decompress(&jpeg);
+	return retval;
 }
 
 static void _jpeg_error_handler(j_common_ptr jpeg) {
-	_jpeg_error_manager_s *jpeg_error = (_jpeg_error_manager_s *)jpeg->err;
+	_jpeg_error_manager_s *jpeg_error = (_jpeg_error_manager_s*)jpeg->err;
 	char msg[JMSG_LENGTH_MAX];
 
 	(*jpeg_error->mgr.format_message)(jpeg, msg);

src/libs/unjpeg.h

@@ -22,18 +22,7 @@
 
 #pragma once
 
-#include <stdio.h>
-#include <stdbool.h>
-#include <stdint.h>
-#include <setjmp.h>
-#include <assert.h>
-
-#include <sys/types.h>
-
-#include <jpeglib.h>
-#include <linux/videodev2.h>
-
-#include "logging.h"
+#include "types.h"
 #include "frame.h"
 
 

src/libs/xioctl.h

@@ -26,11 +26,13 @@
 
 #include <sys/ioctl.h>
 
+#include "types.h"
+
 
 #ifndef US_CFG_XIOCTL_RETRIES
 #	define US_CFG_XIOCTL_RETRIES 4
 #endif
-#define _XIOCTL_RETRIES ((unsigned)(US_CFG_XIOCTL_RETRIES))
+#define _XIOCTL_RETRIES ((uint)(US_CFG_XIOCTL_RETRIES))
 
 
 INLINE int us_xioctl(int fd, int request, void *arg) {

src/ustreamer/blank.c

@@ -22,84 +22,31 @@
 
 #include "blank.h"
 
+#include "../libs/types.h"
+#include "../libs/tools.h"
+#include "../libs/frame.h"
+#include "../libs/frametext.h"
 
-static us_frame_s *_init_internal(void);
-static us_frame_s *_init_external(const char *path);
+#include "encoders/cpu/encoder.h"
 
 
-us_frame_s *us_blank_frame_init(const char *path) {
-	us_frame_s *blank = NULL;
-
-	if (path && path[0] != '\0') {
-		blank = _init_external(path);
-	}
-
-	if (blank != NULL) {
-		US_LOG_INFO("Using external blank placeholder: %s", path);
-	} else {
-		blank = _init_internal();
-		US_LOG_INFO("Using internal blank placeholder");
-	}
+us_blank_s *us_blank_init(void) {
+	us_blank_s *blank;
+	US_CALLOC(blank, 1);
+	blank->ft = us_frametext_init();
+	blank->raw = blank->ft->frame;
+	blank->jpeg = us_frame_init();
+	us_blank_draw(blank, "< NO SIGNAL >", 640, 480);
 	return blank;
 }
 
-static us_frame_s *_init_internal(void) {
-	us_frame_s *const blank = us_frame_init();
-	us_frame_set_data(blank, US_BLANK_JPEG_DATA, US_BLANK_JPEG_DATA_SIZE);
-	blank->width = US_BLANK_JPEG_WIDTH;
-	blank->height = US_BLANK_JPEG_HEIGHT;
-	blank->format = V4L2_PIX_FMT_JPEG;
-	return blank;
+void us_blank_draw(us_blank_s *blank, const char *text, uint width, uint height) {
+	us_frametext_draw(blank->ft, text, width, height);
+	us_cpu_encoder_compress(blank->raw, blank->jpeg, 95);
 }
 
-static us_frame_s *_init_external(const char *path) {
-	FILE *fp = NULL;
-
-	us_frame_s *blank = us_frame_init();
-	blank->format = V4L2_PIX_FMT_JPEG;
-
-	if ((fp = fopen(path, "rb")) == NULL) {
-		US_LOG_PERROR("Can't open blank placeholder '%s'", path);
-		goto error;
-	}
-
-#	define CHUNK_SIZE ((size_t)(100 * 1024))
-	while (true) {
-		if (blank->used + CHUNK_SIZE >= blank->allocated) {
-			us_frame_realloc_data(blank, blank->used + CHUNK_SIZE * 2);
-		}
-
-		const size_t readed = fread(blank->data + blank->used, 1, CHUNK_SIZE, fp);
-		blank->used += readed;
-
-		if (readed < CHUNK_SIZE) {
-			if (feof(fp)) {
-				break;
-			} else {
-				US_LOG_PERROR("Can't read blank placeholder");
-				goto error;
-			}
-		}
-	}
-#	undef CHUNK_SIZE
-
-	us_frame_s *const decoded = us_frame_init();
-	if (us_unjpeg(blank, decoded, false) < 0) {
-		us_frame_destroy(decoded);
-		goto error;
-	}
-	blank->width = decoded->width;
-	blank->height = decoded->height;
-	us_frame_destroy(decoded);
-
-	goto ok;
-
-	error:
-		us_frame_destroy(blank);
-		blank = NULL;
-
-	ok:
-		US_DELETE(fp, fclose);
-
-	return blank;
+void us_blank_destroy(us_blank_s *blank) {
+	us_frame_destroy(blank->jpeg);
+	us_frametext_destroy(blank->ft);
+	free(blank);
 }

src/ustreamer/blank.h

@@ -22,17 +22,19 @@
 
 #pragma once
 
-#include <stdio.h>
-#include <stdbool.h>
-
-#include <linux/videodev2.h>
-
-#include "../libs/tools.h"
-#include "../libs/logging.h"
+#include "../libs/types.h"
 #include "../libs/frame.h"
-#include "../libs/unjpeg.h"
-
-#include "data/blank_jpeg.h"
+#include "../libs/frametext.h"
 
 
-us_frame_s *us_blank_frame_init(const char *path);
+typedef struct {
+	us_frametext_s	*ft;
+	us_frame_s		*raw;
+	us_frame_s		*jpeg;
+} us_blank_s;
+
+
+us_blank_s *us_blank_init(void);
+void us_blank_destroy(us_blank_s *blank);
+
+void us_blank_draw(us_blank_s *blank, const char *text, uint width, uint height);

src/ustreamer/data/blank_jpeg.c

@@ -1,723 +0,0 @@
-/*****************************************************************************
-#                                                                            #
-#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
-#                                                                            #
-#    Copyright (C) 2018-2023  Maxim Devaev <mdevaev@gmail.com>               #
-#                                                                            #
-#    This program is free software: you can redistribute it and/or modify    #
-#    it under the terms of the GNU General Public License as published by    #
-#    the Free Software Foundation, either version 3 of the License, or       #
-#    (at your option) any later version.                                     #
-#                                                                            #
-#    This program is distributed in the hope that it will be useful,         #
-#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
-#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
-#    GNU General Public License for more details.                            #
-#                                                                            #
-#    You should have received a copy of the GNU General Public License       #
-#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
-#                                                                            #
-*****************************************************************************/
-
-#include "blank_jpeg.h"
-
-
-const unsigned US_BLANK_JPEG_WIDTH = 640;
-const unsigned US_BLANK_JPEG_HEIGHT = 480;
-
-const size_t US_BLANK_JPEG_DATA_SIZE = 13845;
-const uint8_t US_BLANK_JPEG_DATA[] = {
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-	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0xFF,
-	0xD2, 0xAF, 0xFC, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-	0x00, 0x00, 0x07, 0xFF, 0xD9,
-};

src/ustreamer/encoder.c

@@ -73,13 +73,13 @@ void us_encoder_destroy(us_encoder_s *enc) {
 	free(enc);
 }
 
-us_encoder_type_e us_encoder_parse_type(const char *str) {
+int us_encoder_parse_type(const char *str) {
 	US_ARRAY_ITERATE(_ENCODER_TYPES, 0, item, {
 		if (!strcasecmp(item->name, str)) {
 			return item->type;
 		}
 	});
-	return US_ENCODER_TYPE_UNKNOWN;
+	return -1;
 }
 
 const char *us_encoder_type_to_string(us_encoder_type_e type) {
@@ -91,12 +91,14 @@ const char *us_encoder_type_to_string(us_encoder_type_e type) {
 	return _ENCODER_TYPES[0].name;
 }
 
-us_workers_pool_s *us_encoder_workers_pool_init(us_encoder_s *enc, us_device_s *dev) {
+void us_encoder_open(us_encoder_s *enc, us_device_s *dev) {
+	assert(enc->run->pool == NULL);
+
 #	define DR(x_next) dev->run->x_next
 
 	us_encoder_type_e type = (_ER(cpu_forced) ? US_ENCODER_TYPE_CPU : enc->type);
 	unsigned quality = dev->jpeg_quality;
-	unsigned n_workers = us_min_u(enc->n_workers, DR(n_bufs));
+	unsigned n_workers = US_MIN(enc->n_workers, DR(n_bufs));
 	bool cpu_forced = false;
 
 	if (us_is_jpeg(DR(format)) && type != US_ENCODER_TYPE_HW) {
@@ -120,7 +122,7 @@ us_workers_pool_s *us_encoder_workers_pool_init(us_encoder_s *enc, us_device_s *
 		for (; _ER(n_m2ms) < n_workers; ++_ER(n_m2ms)) {
 			// Начинаем с нуля и доинициализируем на следующих заходах при необходимости
 			char name[32];
-			snprintf(name, 32, "JPEG-%u", _ER(n_m2ms));
+			US_SNPRINTF(name, 31, "JPEG-%u", _ER(n_m2ms));
 			if (type == US_ENCODER_TYPE_M2M_VIDEO) {
 				_ER(m2ms[_ER(n_m2ms)]) = us_m2m_mjpeg_encoder_init(name, enc->m2m_path, quality);
 			} else {
@@ -162,7 +164,7 @@ us_workers_pool_s *us_encoder_workers_pool_init(us_encoder_s *enc, us_device_s *
 			: 0
 		);
 
-		return us_workers_pool_init(
+		enc->run->pool = us_workers_pool_init(
 			"JPEG", "jw", n_workers, desired_interval,
 			_worker_job_init, (void *)enc,
 			_worker_job_destroy,
@@ -171,6 +173,11 @@ us_workers_pool_s *us_encoder_workers_pool_init(us_encoder_s *enc, us_device_s *
 #	undef DR
 }
 
+void us_encoder_close(us_encoder_s *enc) {
+	assert(enc->run->pool != NULL);
+	US_DELETE(enc->run->pool, us_workers_pool_destroy);
+}
+
 void us_encoder_get_runtime_params(us_encoder_s *enc, us_encoder_type_e *type, unsigned *quality) {
 	US_MUTEX_LOCK(_ER(mutex));
 	*type = _ER(type);
@@ -198,8 +205,6 @@ static bool _worker_run_job(us_worker_s *wr) {
 	const us_frame_s *src = &job->hw->raw;
 	us_frame_s *dest = job->dest;
 
-	assert(_ER(type) != US_ENCODER_TYPE_UNKNOWN);
-
 	if (_ER(type) == US_ENCODER_TYPE_CPU) {
 		US_LOG_VERBOSE("Compressing JPEG using CPU: worker=%s, buffer=%u",
 			wr->name, job->hw->buf.index);
@@ -223,6 +228,9 @@ static bool _worker_run_job(us_worker_s *wr) {
 		us_frame_encoding_begin(src, dest, V4L2_PIX_FMT_JPEG);
 		usleep(5000); // Просто чтобы работала логика desired_fps
 		dest->encode_end_ts = us_get_now_monotonic(); // us_frame_encoding_end()
+
+	} else {
+		assert(0 && "Unknown encoder type");
 	}
 
 	US_LOG_VERBOSE("Compressed new JPEG: size=%zu, time=%0.3Lf, worker=%s, buffer=%u",

src/ustreamer/encoder.h

@@ -35,8 +35,8 @@
 #include "../libs/threading.h"
 #include "../libs/logging.h"
 #include "../libs/frame.h"
+#include "../libs/device.h"
 
-#include "device.h"
 #include "workers.h"
 #include "m2m.h"
 
@@ -47,7 +47,6 @@
 #define ENCODER_TYPES_STR "CPU, HW, M2M-VIDEO, M2M-IMAGE, NOOP"
 
 typedef enum {
-	US_ENCODER_TYPE_UNKNOWN, // Only for us_encoder_parse_type() and main()
 	US_ENCODER_TYPE_CPU,
 	US_ENCODER_TYPE_HW,
 	US_ENCODER_TYPE_M2M_VIDEO,
@@ -63,6 +62,8 @@ typedef struct {
 
 	unsigned			n_m2ms;
 	us_m2m_encoder_s	**m2ms;
+
+	us_workers_pool_s	*pool;
 } us_encoder_runtime_s;
 
 typedef struct {
@@ -83,10 +84,10 @@ typedef struct {
 us_encoder_s *us_encoder_init(void);
 void us_encoder_destroy(us_encoder_s *enc);
 
-us_encoder_type_e us_encoder_parse_type(const char *str);
+int us_encoder_parse_type(const char *str);
 const char *us_encoder_type_to_string(us_encoder_type_e type);
 
-us_workers_pool_s *us_encoder_workers_pool_init(us_encoder_s *enc, us_device_s *dev);
-void us_encoder_get_runtime_params(us_encoder_s *enc, us_encoder_type_e *type, unsigned *quality);
+void us_encoder_open(us_encoder_s *enc, us_device_s *dev);
+void us_encoder_close(us_encoder_s *enc);
 
-int us_encoder_compress(us_encoder_s *enc, unsigned worker_number, us_frame_s *src, us_frame_s *dest);
+void us_encoder_get_runtime_params(us_encoder_s *enc, us_encoder_type_e *type, unsigned *quality);

src/ustreamer/h264.c

@@ -22,8 +22,19 @@
 
 #include "h264.h"
 
+#include <stdatomic.h>
 
-us_h264_stream_s *us_h264_stream_init(us_memsink_s *sink, const char *path, unsigned bitrate, unsigned gop) {
+#include "../libs/types.h"
+#include "../libs/tools.h"
+#include "../libs/logging.h"
+#include "../libs/frame.h"
+#include "../libs/memsink.h"
+#include "../libs/unjpeg.h"
+
+#include "m2m.h"
+
+
+us_h264_stream_s *us_h264_stream_init(us_memsink_s *sink, const char *path, uint bitrate, uint gop) {
 	us_h264_stream_s *h264;
 	US_CALLOC(h264, 1);
 	h264->sink = sink;
@@ -42,18 +53,15 @@ void us_h264_stream_destroy(us_h264_stream_s *h264) {
 }
 
 void us_h264_stream_process(us_h264_stream_s *h264, const us_frame_s *frame, bool force_key) {
-	if (!us_memsink_server_check(h264->sink, frame)) {
-		return;
-	}
-
 	if (us_is_jpeg(frame->format)) {
-		const long double now = us_get_now_monotonic();
+		const ldf now_ts = us_get_now_monotonic();
 		US_LOG_DEBUG("H264: Input frame is JPEG; decoding ...");
 		if (us_unjpeg(frame, h264->tmp_src, true) < 0) {
+			atomic_store(&h264->online, false);
 			return;
 		}
 		frame = h264->tmp_src;
-		US_LOG_VERBOSE("H264: JPEG decoded; time=%.3Lf", us_get_now_monotonic() - now);
+		US_LOG_VERBOSE("H264: JPEG decoded; time=%.3Lf", us_get_now_monotonic() - now_ts);
 	}
 
 	if (h264->key_requested) {

src/ustreamer/h264.h

@@ -22,15 +22,12 @@
 
 #pragma once
 
-#include <stdbool.h>
 #include <stdatomic.h>
-#include <assert.h>
 
-#include "../libs/tools.h"
-#include "../libs/logging.h"
+#include "../libs/types.h"
 #include "../libs/frame.h"
 #include "../libs/memsink.h"
-#include "../libs/unjpeg.h"
+
 #include "m2m.h"
 
 
@@ -44,6 +41,6 @@ typedef struct {
 } us_h264_stream_s;
 
 
-us_h264_stream_s *us_h264_stream_init(us_memsink_s *sink, const char *path, unsigned bitrate, unsigned gop);
+us_h264_stream_s *us_h264_stream_init(us_memsink_s *sink, const char *path, uint bitrate, uint gop);
 void us_h264_stream_destroy(us_h264_stream_s *h264);
 void us_h264_stream_process(us_h264_stream_s *h264, const us_frame_s *frame, bool force_key);

src/ustreamer/http/bev.c

@@ -22,6 +22,14 @@
 
 #include "bev.h"
 
+#include <string.h>
+#include <errno.h>
+
+#include <event2/util.h>
+#include <event2/bufferevent.h>
+
+#include "../../libs/tools.h"
+
 
 char *us_bufferevent_format_reason(short what) {
 	char *reason;
@@ -31,7 +39,7 @@ char *us_bufferevent_format_reason(short what) {
 	char *const perror_str = us_errno_to_string(EVUTIL_SOCKET_ERROR());
 	bool first = true;
 
-	strcat(reason, perror_str);
+	strncat(reason, perror_str, 1023);
 	free(perror_str);
 	strcat(reason, " (");
 
@@ -45,13 +53,11 @@ char *us_bufferevent_format_reason(short what) {
 				strcat(reason, x_name); \
 			} \
 		}
-
 	FILL_REASON(BEV_EVENT_READING, "reading");
 	FILL_REASON(BEV_EVENT_WRITING, "writing");
 	FILL_REASON(BEV_EVENT_ERROR, "error");
 	FILL_REASON(BEV_EVENT_TIMEOUT, "timeout");
 	FILL_REASON(BEV_EVENT_EOF, "eof"); // cppcheck-suppress unreadVariable
-
 #	undef FILL_REASON
 
 	strcat(reason, ")");

src/ustreamer/http/bev.h

@@ -22,14 +22,5 @@
 
 #pragma once
 
-#include <string.h>
-#include <errno.h>
-
-#include <event2/util.h>
-#include <event2/bufferevent.h>
-
-#include "../../libs/tools.h"
-#include "../../libs/logging.h"
-
 
 char *us_bufferevent_format_reason(short what);

src/ustreamer/http/mime.c

@@ -22,6 +22,13 @@
 
 #include "mime.h"
 
+#include <string.h>
+
+#include <event2/util.h>
+
+#include "../../libs/tools.h"
+#include "../../libs/array.h"
+
 
 static const struct {
 	const char *ext; // cppcheck-suppress unusedStructMember

src/ustreamer/http/mime.h

@@ -22,12 +22,5 @@
 
 #pragma once
 
-#include <string.h>
-
-#include <event2/util.h>
-
-#include "../../libs/tools.h"
-#include "../../libs/array.h"
-
 
 const char *us_guess_mime_type(const char *str);

src/ustreamer/http/path.c

@@ -22,6 +22,14 @@
 
 #include "path.h"
 
+#ifdef TEST_HTTP_PATH
+#	include <stdio.h>
+#	include <stdlib.h>
+#endif
+#include <string.h>
+
+#include "../../libs/tools.h"
+
 
 char *us_simplify_request_path(const char *str) {
 	// Based on Lighttpd sources:

src/ustreamer/http/path.h

@@ -22,13 +22,5 @@
 
 #pragma once
 
-#ifdef TEST_HTTP_PATH
-#	include <stdio.h>
-#	include <stdlib.h>
-#endif
-#include <string.h>
-
-#include "../../libs/tools.h"
-
 
 char *us_simplify_request_path(const char *str);

src/ustreamer/http/server.h

@@ -22,96 +22,62 @@
 
 #pragma once
 
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdint.h>
-#include <stdbool.h>
-#include <stdatomic.h>
-#include <string.h>
-#include <inttypes.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <assert.h>
-
-#include <sys/types.h>
 #include <sys/stat.h>
-#include <sys/time.h>
-#include <netinet/tcp.h>
-#include <netinet/in.h>
-#include <netinet/ip.h>
 
 #include <event2/util.h>
 #include <event2/event.h>
-#include <event2/thread.h>
 #include <event2/http.h>
-#include <event2/buffer.h>
-#include <event2/bufferevent.h>
-#include <event2/keyvalq_struct.h>
 
-#ifndef EVTHREAD_USE_PTHREADS_IMPLEMENTED
-#	error Required libevent-pthreads support
-#endif
-
-#include "../../libs/tools.h"
-#include "../../libs/threading.h"
-#include "../../libs/logging.h"
-#include "../../libs/process.h"
+#include "../../libs/types.h"
 #include "../../libs/frame.h"
-#include "../../libs/base64.h"
 #include "../../libs/list.h"
-#include "../data/index_html.h"
-#include "../data/favicon_ico.h"
 #include "../encoder.h"
 #include "../stream.h"
-#ifdef WITH_GPIO
-#	include "../gpio/gpio.h"
-#endif
-
-#include "bev.h"
-#include "unix.h"
-#include "uri.h"
-#include "mime.h"
-#include "static.h"
-#ifdef WITH_SYSTEMD
-#	include "systemd/systemd.h"
-#endif
 
 
 typedef struct us_stream_client_sx {
 	struct us_server_sx		*server;
 	struct evhttp_request	*request;
 
-	char		*key;
-	bool		extra_headers;
-	bool		advance_headers;
-	bool		dual_final_frames;
-	bool		zero_data;
+	char	*key;
+	bool	extra_headers;
+	bool	advance_headers;
+	bool	dual_final_frames;
+	bool	zero_data;
 
-	char		*hostport;
-	uint64_t	id;
-	bool		need_initial;
-	bool		need_first_frame;
-	bool		updated_prev;
-	unsigned	fps;
-	unsigned	fps_accum;
-	long long	fps_accum_second;
+	char	*hostport;
+	u64		id;
+	bool	need_initial;
+	bool	need_first_frame;
+	bool	updated_prev;
+	uint	fps_accum;
+	sll		fps_ts;
+	uint	fps;
 
 	US_LIST_STRUCT(struct us_stream_client_sx);
 } us_stream_client_s;
 
-typedef struct {
-	us_frame_s		*frame;
-	unsigned		captured_fps;
-	unsigned		queued_fps;
-	unsigned		dropped;
-	long double		expose_begin_ts;
-	long double		expose_cmp_ts;
-	long double		expose_end_ts;
+typedef struct us_snapshot_client_sx {
+	struct us_server_sx		*server;
+	struct evhttp_request	*request;
+	ldf						request_ts;
 
-	bool			notify_last_online;
-	unsigned		notify_last_width;
-	unsigned		notify_last_height;
-} us_exposed_s;
+	US_LIST_STRUCT(struct us_snapshot_client_sx);
+} us_snapshot_client_s;
+
+typedef struct {
+	us_frame_s	*frame;
+	uint		captured_fps;
+	uint		queued_fps;
+	uint		dropped;
+	ldf			expose_begin_ts;
+	ldf			expose_cmp_ts;
+	ldf			expose_end_ts;
+
+	bool		notify_last_online;
+	uint		notify_last_width;
+	uint		notify_last_height;
+} us_server_exposed_s;
 
 typedef struct {
 	struct event_base	*base;
@@ -120,44 +86,43 @@ typedef struct {
 
 	char				*auth_token;
 
-	struct event		*request_watcher;
-	long double			last_request_ts;
-
 	struct event		*refresher;
-	us_stream_s			*stream;
-	us_exposed_s			*exposed;
+	us_server_exposed_s	*exposed;
 
 	us_stream_client_s	*stream_clients;
-	unsigned			stream_clients_count;
+	uint				stream_clients_count;
+
+	us_snapshot_client_s *snapshot_clients;
 } us_server_runtime_s;
 
 typedef struct us_server_sx {
-	char		*host;
-	unsigned	port;
+	us_stream_s	*stream;
 
-	char		*unix_path;
-	bool		unix_rm;
-	mode_t		unix_mode;
+	char	*host;
+	uint	port;
+
+	char	*unix_path;
+	bool	unix_rm;
+	mode_t	unix_mode;
 
 #	ifdef WITH_SYSTEMD
-	bool		systemd;
+	bool	systemd;
 #	endif
 
-	bool		tcp_nodelay;
-	unsigned	timeout;
+	bool	tcp_nodelay;
+	uint	timeout;
 
-	char		*user;
-	char		*passwd;
-	char		*static_path;
-	char		*allow_origin;
-	char		*instance_id;
+	char	*user;
+	char	*passwd;
+	char	*static_path;
+	char	*allow_origin;
+	char	*instance_id;
 
-	unsigned	drop_same_frames;
-	unsigned	fake_width;
-	unsigned	fake_height;
+	uint	drop_same_frames;
+	uint	fake_width;
+	uint	fake_height;
 
-	bool		notify_parent;
-	unsigned	exit_on_no_clients;
+	bool	notify_parent;
 
 	us_server_runtime_s *run;
 } us_server_s;

src/ustreamer/http/static.c

@@ -22,6 +22,19 @@
 
 #include "static.h"
 
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <assert.h>
+
+#include <sys/stat.h>
+
+#include "../../libs/tools.h"
+#include "../../libs/logging.h"
+
+#include "path.h"
+
 
 char *us_find_static_file_path(const char *root_path, const char *request_path) {
 	char *path = NULL;
@@ -33,7 +46,7 @@ char *us_find_static_file_path(const char *root_path, const char *request_path)
 	}
 
 	US_CALLOC(path, strlen(root_path) + strlen(simplified_path) + 16); // + reserved for /index.html
-	sprintf(path, "%s/%s", root_path, simplified_path);
+	assert(sprintf(path, "%s/%s", root_path, simplified_path) > 0);
 
 	struct stat st;
 #	define LOAD_STAT { \
@@ -42,14 +55,12 @@ char *us_find_static_file_path(const char *root_path, const char *request_path)
 				goto error; \
 			} \
 		}
-
 	LOAD_STAT;
 	if (S_ISDIR(st.st_mode)) {
 		US_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)) {
@@ -64,12 +75,10 @@ char *us_find_static_file_path(const char *root_path, const char *request_path)
 
 	goto ok;
 
-	error:
-		US_DELETE(path, free);
-		path = NULL;
-
-	ok:
-		free(simplified_path);
+error:
+	US_DELETE(path, free);
 
+ok:
+	free(simplified_path);
 	return path;
 }

src/ustreamer/http/static.h

@@ -22,17 +22,5 @@
 
 #pragma once
 
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#include <sys/stat.h>
-
-#include "../../libs/tools.h"
-#include "../../libs/logging.h"
-
-#include "path.h"
-
 
 char *us_find_static_file_path(const char *root_path, const char *request_path);

src/ustreamer/http/systemd/systemd.c

@@ -22,11 +22,22 @@
 
 #include "systemd.h"
 
+#include <unistd.h>
+#include <assert.h>
+
+#include <event2/http.h>
+#include <event2/util.h>
+
+#include <systemd/sd-daemon.h>
+
+#include "../../../libs/tools.h"
+#include "../../../libs/logging.h"
+
 
 evutil_socket_t us_evhttp_bind_systemd(struct evhttp *http) {
 	const int fds = sd_listen_fds(1);
 	if (fds < 1) {
-		US_LOG_ERROR("No available systemd sockets");
+		US_LOG_ERROR("HTTP: No available systemd sockets");
 		return -1;
 	}
 
@@ -39,7 +50,7 @@ evutil_socket_t us_evhttp_bind_systemd(struct evhttp *http) {
 	assert(!evutil_make_socket_nonblocking(fd));
 
 	if (evhttp_accept_socket(http, fd) < 0) {
-		US_LOG_PERROR("Can't evhttp_accept_socket() systemd socket");
+		US_LOG_PERROR("HTTP: Can't evhttp_accept_socket() systemd socket");
 		return -1;
 	}
 	return fd;

src/ustreamer/http/systemd/systemd.h

@@ -22,16 +22,8 @@
 
 #pragma once
 
-#include <unistd.h>
-#include <assert.h>
-
 #include <event2/http.h>
 #include <event2/util.h>
 
-#include <systemd/sd-daemon.h>
-
-#include "../../../libs/tools.h"
-#include "../../../libs/logging.h"
-
 
 evutil_socket_t us_evhttp_bind_systemd(struct evhttp *http);

src/ustreamer/http/unix.c

@@ -22,46 +22,59 @@
 
 #include "unix.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 "../../libs/types.h"
+#include "../../libs/tools.h"
+#include "../../libs/logging.h"
+
 
 evutil_socket_t us_evhttp_bind_unix(struct evhttp *http, const char *path, bool rm, mode_t mode) {
 	struct sockaddr_un addr = {0};
+	const uz max_sun_path = sizeof(addr.sun_path) - 1;
 
-#	define MAX_SUN_PATH (sizeof(addr.sun_path) - 1)
-
-	if (strlen(path) > MAX_SUN_PATH) {
-		US_LOG_ERROR("UNIX socket path is too long; max=%zu", MAX_SUN_PATH);
+	if (strlen(path) > max_sun_path) {
+		US_LOG_ERROR("HTTP: UNIX socket path is too long; max=%zu", max_sun_path);
 		return -1;
 	}
 
-	strncpy(addr.sun_path, path, MAX_SUN_PATH);
+	strncpy(addr.sun_path, path, max_sun_path);
 	addr.sun_family = AF_UNIX;
 
-#	undef MAX_SUN_PATH
-
 	const evutil_socket_t fd = socket(AF_UNIX, SOCK_STREAM, 0);
 	assert(fd >= 0);
 	assert(!evutil_make_socket_nonblocking(fd));
 
 	if (rm && unlink(path) < 0) {
 		if (errno != ENOENT) {
-			US_LOG_PERROR("Can't remove old UNIX socket '%s'", path);
+			US_LOG_PERROR("HTTP: Can't remove old UNIX socket '%s'", path);
 			return -1;
 		}
 	}
-	if (bind(fd, (struct sockaddr *)&addr, sizeof(struct sockaddr_un)) < 0) {
-		US_LOG_PERROR("Can't bind HTTP to UNIX socket '%s'", path);
+	if (bind(fd, (struct sockaddr*)&addr, sizeof(struct sockaddr_un)) < 0) {
+		US_LOG_PERROR("HTTP: Can't bind HTTP to UNIX socket '%s'", path);
 		return -1;
 	}
 	if (mode && chmod(path, mode) < 0) {
-		US_LOG_PERROR("Can't set permissions %o to UNIX socket '%s'", mode, path);
+		US_LOG_PERROR("HTTP: Can't set permissions %o to UNIX socket '%s'", mode, path);
 		return -1;
 	}
 	if (listen(fd, 128) < 0) {
-		US_LOG_PERROR("Can't listen UNIX socket '%s'", path);
+		US_LOG_PERROR("HTTP: Can't listen UNIX socket '%s'", path);
 		return -1;
 	}
 	if (evhttp_accept_socket(http, fd) < 0) {
-		US_LOG_PERROR("Can't evhttp_accept_socket() UNIX socket '%s'", path);
+		US_LOG_PERROR("HTTP: Can't evhttp_accept_socket() UNIX socket '%s'", path);
 		return -1;
 	}
 	return fd;

src/ustreamer/http/unix.h

@@ -22,21 +22,12 @@
 
 #pragma once
 
-#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 "../../libs/tools.h"
-#include "../../libs/logging.h"
+#include "../../libs/types.h"
 
 
 evutil_socket_t us_evhttp_bind_unix(struct evhttp *http, const char *path, bool rm, mode_t mode);

src/ustreamer/http/uri.c

@@ -22,6 +22,12 @@
 
 #include "uri.h"
 
+#include <event2/util.h>
+#include <event2/http.h>
+#include <event2/keyvalq_struct.h>
+
+#include "../../libs/types.h"
+
 
 bool us_uri_get_true(struct evkeyvalq *params, const char *key) {
 	const char *value_str = evhttp_find_header(params, key);

src/ustreamer/http/uri.h

@@ -22,12 +22,10 @@
 
 #pragma once
 
-#include <stdbool.h>
-
-#include <event2/util.h>
-#include <event2/http.h>
 #include <event2/keyvalq_struct.h>
 
+#include "../../libs/types.h"
+
 
 bool us_uri_get_true(struct evkeyvalq *params, const char *key);
 char *us_uri_get_string(struct evkeyvalq *params, const char *key);

src/ustreamer/m2m.c

@@ -22,16 +22,34 @@
 
 #include "m2m.h"
 
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include <fcntl.h>
+#include <poll.h>
+#include <errno.h>
+#include <assert.h>
+
+#include <sys/mman.h>
+
+#include <linux/videodev2.h>
+
+#include "../libs/types.h"
+#include "../libs/tools.h"
+#include "../libs/logging.h"
+#include "../libs/frame.h"
+#include "../libs/xioctl.h"
+
 
 static us_m2m_encoder_s *_m2m_encoder_init(
-	const char *name, const char *path, unsigned output_format,
-	unsigned fps, unsigned bitrate, unsigned gop, unsigned quality, bool allow_dma);
+	const char *name, const char *path, uint output_format,
+	uint bitrate, uint gop, uint quality, bool allow_dma);
 
-static void _m2m_encoder_prepare(us_m2m_encoder_s *enc, const us_frame_s *frame);
+static void _m2m_encoder_ensure(us_m2m_encoder_s *enc, const us_frame_s *frame);
 
 static int _m2m_encoder_init_buffers(
 	us_m2m_encoder_s *enc, const char *name, enum v4l2_buf_type type,
-	us_m2m_buffer_s **bufs_ptr, unsigned *n_bufs_ptr, bool dma);
+	us_m2m_buffer_s **bufs_ptr, uint *n_bufs_ptr, bool dma);
 
 static void _m2m_encoder_cleanup(us_m2m_encoder_s *enc);
 
@@ -44,18 +62,13 @@ static int _m2m_encoder_compress_raw(us_m2m_encoder_s *enc, const us_frame_s *sr
 #define _E_LOG_VERBOSE(x_msg, ...)	US_LOG_VERBOSE("%s: " x_msg, enc->name, ##__VA_ARGS__)
 #define _E_LOG_DEBUG(x_msg, ...)	US_LOG_DEBUG("%s: " x_msg, enc->name, ##__VA_ARGS__)
 
-#define _RUN(x_next) enc->run->x_next
 
-
-us_m2m_encoder_s *us_m2m_h264_encoder_init(const char *name, const char *path, unsigned bitrate, unsigned gop) {
-	// FIXME: 30 or 0? https://github.com/6by9/yavta/blob/master/yavta.c#L2100
-	// По логике вещей правильно 0, но почему-то на низких разрешениях типа 640x480
-	// енкодер через несколько секунд перестает производить корректные фреймы.
+us_m2m_encoder_s *us_m2m_h264_encoder_init(const char *name, const char *path, uint bitrate, uint gop) {
 	bitrate *= 1000; // From Kbps
-	return _m2m_encoder_init(name, path, V4L2_PIX_FMT_H264, 30, bitrate, gop, 0, true);
+	return _m2m_encoder_init(name, path, V4L2_PIX_FMT_H264, bitrate, gop, 0, true);
 }
 
-us_m2m_encoder_s *us_m2m_mjpeg_encoder_init(const char *name, const char *path, unsigned quality) {
+us_m2m_encoder_s *us_m2m_mjpeg_encoder_init(const char *name, const char *path, uint quality) {
 	const double b_min = 25;
 	const double b_max = 20000;
 	const double step = 25;
@@ -63,13 +76,12 @@ us_m2m_encoder_s *us_m2m_mjpeg_encoder_init(const char *name, const char *path,
 	bitrate = step * round(bitrate / step);
 	bitrate *= 1000; // From Kbps
 	assert(bitrate > 0);
-	// FIXME: То же самое про 30 or 0, но еще даже не проверено на низких разрешениях
-	return _m2m_encoder_init(name, path, V4L2_PIX_FMT_MJPEG, 30, bitrate, 0, 0, true);
+	return _m2m_encoder_init(name, path, V4L2_PIX_FMT_MJPEG, bitrate, 0, 0, true);
 }
 
-us_m2m_encoder_s *us_m2m_jpeg_encoder_init(const char *name, const char *path, unsigned quality) {
+us_m2m_encoder_s *us_m2m_jpeg_encoder_init(const char *name, const char *path, uint quality) {
 	// FIXME: DMA не работает
-	return _m2m_encoder_init(name, path, V4L2_PIX_FMT_JPEG, 30, 0, 0, quality, false);
+	return _m2m_encoder_init(name, path, V4L2_PIX_FMT_JPEG, 0, 0, quality, false);
 }
 
 void us_m2m_encoder_destroy(us_m2m_encoder_s *enc) {
@@ -81,22 +93,18 @@ void us_m2m_encoder_destroy(us_m2m_encoder_s *enc) {
 }
 
 int us_m2m_encoder_compress(us_m2m_encoder_s *enc, const us_frame_s *src, us_frame_s *dest, bool force_key) {
+	us_m2m_encoder_runtime_s *const run = enc->run;
+
 	us_frame_encoding_begin(src, dest, (enc->output_format == V4L2_PIX_FMT_MJPEG ? V4L2_PIX_FMT_JPEG : enc->output_format));
 
-	if (
-		_RUN(width) != src->width
-		|| _RUN(height) != src->height
-		|| _RUN(input_format) != src->format
-		|| _RUN(stride) != src->stride
-		|| _RUN(dma) != (enc->allow_dma && src->dma_fd >= 0)
-	) {
-		_m2m_encoder_prepare(enc, src);
-	}
-	if (!_RUN(ready)) { // Already prepared but failed
+	_m2m_encoder_ensure(enc, src);
+	if (!run->ready) { // Already prepared but failed
 		return -1;
 	}
 
-	force_key = (enc->output_format == V4L2_PIX_FMT_H264 && (force_key || _RUN(last_online) != src->online));
+	force_key = (enc->output_format == V4L2_PIX_FMT_H264 && (force_key || run->last_online != src->online));
+
+	_E_LOG_DEBUG("Compressing new frame; force_key=%d ...", force_key);
 
 	if (_m2m_encoder_compress_raw(enc, src, dest, force_key) < 0) {
 		_m2m_encoder_cleanup(enc);
@@ -109,13 +117,13 @@ int us_m2m_encoder_compress(us_m2m_encoder_s *enc, const us_frame_s *src, us_fra
 	_E_LOG_VERBOSE("Compressed new frame: size=%zu, time=%0.3Lf, force_key=%d",
 		dest->used, dest->encode_end_ts - dest->encode_begin_ts, force_key);
 
-	_RUN(last_online) = src->online;
+	run->last_online = src->online;
 	return 0;
 }
 
 static us_m2m_encoder_s *_m2m_encoder_init(
-	const char *name, const char *path, unsigned output_format,
-	unsigned fps, unsigned bitrate, unsigned gop, unsigned quality, bool allow_dma) {
+	const char *name, const char *path, uint output_format,
+	uint bitrate, uint gop, uint quality, bool allow_dma) {
 
 	US_LOG_INFO("%s: Initializing encoder ...", name);
 
@@ -133,7 +141,6 @@ static us_m2m_encoder_s *_m2m_encoder_init(
 		enc->path = us_strdup(path);
 	}
 	enc->output_format = output_format;
-	enc->fps = fps;
 	enc->bitrate = bitrate;
 	enc->gop = gop;
 	enc->quality = quality;
@@ -143,30 +150,49 @@ static us_m2m_encoder_s *_m2m_encoder_init(
 }
 
 #define _E_XIOCTL(x_request, x_value, x_msg, ...) { \
-		if (us_xioctl(_RUN(fd), x_request, x_value) < 0) { \
+		if (us_xioctl(run->fd, x_request, x_value) < 0) { \
 			_E_LOG_PERROR(x_msg, ##__VA_ARGS__); \
 			goto error; \
 		} \
 	}
 
-static void _m2m_encoder_prepare(us_m2m_encoder_s *enc, const us_frame_s *frame) {
+static void _m2m_encoder_ensure(us_m2m_encoder_s *enc, const us_frame_s *frame) {
+	us_m2m_encoder_runtime_s *const run = enc->run;
+
 	const bool dma = (enc->allow_dma && frame->dma_fd >= 0);
+	if (
+		run->p_width == frame->width
+		&& run->p_height == frame->height
+		&& run->p_input_format == frame->format
+		&& run->p_stride == frame->stride
+		&& run->p_dma == dma
+	) {
+		return; // Configured already
+	}
 
 	_E_LOG_INFO("Configuring encoder: DMA=%d ...", dma);
 
+	_E_LOG_DEBUG("Encoder changes: width=%u->%u, height=%u->%u, input_format=%u->%u, stride=%u->%u, dma=%u->%u",
+		run->p_width, frame->width,
+		run->p_height, frame->height,
+		run->p_input_format, frame->format,
+		run->p_stride, frame->stride,
+		run->p_dma, dma);
+
 	_m2m_encoder_cleanup(enc);
 
-	_RUN(width) = frame->width;
-	_RUN(height) = frame->height;
-	_RUN(input_format) = frame->format;
-	_RUN(stride) = frame->stride;
-	_RUN(dma) = dma;
+	run->p_width = frame->width;
+	run->p_height = frame->height;
+	run->p_input_format = frame->format;
+	run->p_stride = frame->stride;
+	run->p_dma = dma;
 
-	if ((_RUN(fd) = open(enc->path, O_RDWR)) < 0) {
+	_E_LOG_DEBUG("Opening encoder device ...");
+	if ((run->fd = open(enc->path, O_RDWR)) < 0) {
 		_E_LOG_PERROR("Can't open encoder device");
 		goto error;
 	}
-	_E_LOG_DEBUG("Encoder device fd=%d opened", _RUN(fd));
+	_E_LOG_DEBUG("Encoder device fd=%d opened", run->fd);
 
 #	define SET_OPTION(x_cid, x_value) { \
 			struct v4l2_control m_ctl = {0}; \
@@ -175,12 +201,11 @@ static void _m2m_encoder_prepare(us_m2m_encoder_s *enc, const us_frame_s *frame)
 			_E_LOG_DEBUG("Configuring option " #x_cid " ..."); \
 			_E_XIOCTL(VIDIOC_S_CTRL, &m_ctl, "Can't set option " #x_cid); \
 		}
-
 	if (enc->output_format == V4L2_PIX_FMT_H264) {
 		SET_OPTION(V4L2_CID_MPEG_VIDEO_BITRATE,				enc->bitrate);
 		SET_OPTION(V4L2_CID_MPEG_VIDEO_H264_I_PERIOD,		enc->gop);
 		SET_OPTION(V4L2_CID_MPEG_VIDEO_H264_PROFILE,		V4L2_MPEG_VIDEO_H264_PROFILE_CONSTRAINED_BASELINE);
-		if (_RUN(width) * _RUN(height) <= 1920 * 1080) { // https://forums.raspberrypi.com/viewtopic.php?t=291447#p1762296
+		if (run->p_width * run->p_height <= 1920 * 1080) { // https://forums.raspberrypi.com/viewtopic.php?t=291447#p1762296
 			SET_OPTION(V4L2_CID_MPEG_VIDEO_H264_LEVEL,		V4L2_MPEG_VIDEO_H264_LEVEL_4_0);
 		} else {
 			SET_OPTION(V4L2_CID_MPEG_VIDEO_H264_LEVEL,		V4L2_MPEG_VIDEO_H264_LEVEL_5_1);
@@ -193,19 +218,18 @@ static void _m2m_encoder_prepare(us_m2m_encoder_s *enc, const us_frame_s *frame)
 	} else if (enc->output_format == V4L2_PIX_FMT_JPEG) {
 		SET_OPTION(V4L2_CID_JPEG_COMPRESSION_QUALITY,		enc->quality);
 	}
-
 #	undef SET_OPTION
 
 	{
 		struct v4l2_format fmt = {0};
 		fmt.type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
-		fmt.fmt.pix_mp.width = _RUN(width);
-		fmt.fmt.pix_mp.height = _RUN(height);
-		fmt.fmt.pix_mp.pixelformat = _RUN(input_format);
+		fmt.fmt.pix_mp.width = run->p_width;
+		fmt.fmt.pix_mp.height = run->p_height;
+		fmt.fmt.pix_mp.pixelformat = run->p_input_format;
 		fmt.fmt.pix_mp.field = V4L2_FIELD_ANY;
 		fmt.fmt.pix_mp.colorspace = V4L2_COLORSPACE_JPEG; // libcamera currently has no means to request the right colour space
 		fmt.fmt.pix_mp.num_planes = 1;
-		// fmt.fmt.pix_mp.plane_fmt[0].bytesperline = _RUN(stride);
+		// fmt.fmt.pix_mp.plane_fmt[0].bytesperline = run->p_stride;
 		_E_LOG_DEBUG("Configuring INPUT format ...");
 		_E_XIOCTL(VIDIOC_S_FMT, &fmt, "Can't set INPUT format");
 	}
@@ -213,8 +237,8 @@ static void _m2m_encoder_prepare(us_m2m_encoder_s *enc, const us_frame_s *frame)
 	{
 		struct v4l2_format fmt = {0};
 		fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
-		fmt.fmt.pix_mp.width = _RUN(width);
-		fmt.fmt.pix_mp.height = _RUN(height);
+		fmt.fmt.pix_mp.width = run->p_width;
+		fmt.fmt.pix_mp.height = run->p_height;
 		fmt.fmt.pix_mp.pixelformat = enc->output_format;
 		fmt.fmt.pix_mp.field = V4L2_FIELD_ANY;
 		fmt.fmt.pix_mp.colorspace = V4L2_COLORSPACE_DEFAULT;
@@ -236,21 +260,37 @@ static void _m2m_encoder_prepare(us_m2m_encoder_s *enc, const us_frame_s *frame)
 		}
 	}
 
-	if (enc->fps > 0) { // TODO: Check this for MJPEG
+	if (run->p_width * run->p_height <= 1280 * 720) {
+		// H264 требует каких-то лимитов. Больше 30 не поддерживается, а при 0
+		// через какое-то время начинает производить некорректные фреймы.
+		// Если же привысить fps, то резко увеличивается время кодирования.
+		run->fps_limit = 60;
+	} else {
+		run->fps_limit = 30;
+	}
+	// H264: 30 or 0? https://github.com/6by9/yavta/blob/master/yavta.c#L2100
+	// По логике вещей правильно 0, но почему-то на низких разрешениях типа 640x480
+	// енкодер через несколько секунд перестает производить корректные фреймы.
+	// JPEG: То же самое про 30 or 0, но еще даже не проверено на низких разрешениях.
+	{
 		struct v4l2_streamparm setfps = {0};
 		setfps.type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
 		setfps.parm.output.timeperframe.numerator = 1;
-		setfps.parm.output.timeperframe.denominator = enc->fps;
+		setfps.parm.output.timeperframe.denominator = run->fps_limit;
 		_E_LOG_DEBUG("Configuring INPUT FPS ...");
 		_E_XIOCTL(VIDIOC_S_PARM, &setfps, "Can't set INPUT FPS");
 	}
 
-	if (_m2m_encoder_init_buffers(enc, (dma ? "INPUT-DMA" : "INPUT"), V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE,
-		&_RUN(input_bufs), &_RUN(n_input_bufs), dma) < 0) {
+	if (_m2m_encoder_init_buffers(
+		enc, (dma ? "INPUT-DMA" : "INPUT"), V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE,
+		&run->input_bufs, &run->n_input_bufs, dma
+	) < 0) {
 		goto error;
 	}
-	if (_m2m_encoder_init_buffers(enc, "OUTPUT", V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE,
-		&_RUN(output_bufs), &_RUN(n_output_bufs), false) < 0) {
+	if (_m2m_encoder_init_buffers(
+		enc, "OUTPUT", V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE,
+		&run->output_bufs, &run->n_output_bufs, false
+	) < 0) {
 		goto error;
 	}
 
@@ -264,18 +304,20 @@ static void _m2m_encoder_prepare(us_m2m_encoder_s *enc, const us_frame_s *frame)
 		_E_XIOCTL(VIDIOC_STREAMON, &type, "Can't start OUTPUT");
 	}
 
-	_RUN(ready) = true;
-	_E_LOG_DEBUG("Encoder state: *** READY ***");
+	run->ready = true;
+	_E_LOG_INFO("Encoder is ready");
 	return;
 
-	error:
-		_m2m_encoder_cleanup(enc);
-		_E_LOG_ERROR("Encoder destroyed due an error (prepare)");
+error:
+	_m2m_encoder_cleanup(enc);
+	_E_LOG_ERROR("Encoder destroyed due an error (prepare)");
 }
 
 static int _m2m_encoder_init_buffers(
 	us_m2m_encoder_s *enc, const char *name, enum v4l2_buf_type type,
-	us_m2m_buffer_s **bufs_ptr, unsigned *n_bufs_ptr, bool dma) {
+	us_m2m_buffer_s **bufs_ptr, uint *n_bufs_ptr, bool dma) {
+
+	us_m2m_encoder_runtime_s *const run = enc->run;
 
 	_E_LOG_DEBUG("Initializing %s buffers ...", name);
 
@@ -294,98 +336,102 @@ static int _m2m_encoder_init_buffers(
 
 	if (dma) {
 		*n_bufs_ptr = req.count;
-	} else {
-		US_CALLOC(*bufs_ptr, req.count);
-		for (*n_bufs_ptr = 0; *n_bufs_ptr < req.count; ++(*n_bufs_ptr)) {
-			struct v4l2_buffer buf = {0};
-			struct v4l2_plane plane = {0};
-			buf.type = type;
-			buf.memory = V4L2_MEMORY_MMAP;
-			buf.index = *n_bufs_ptr;
-			buf.length = 1;
-			buf.m.planes = &plane;
-
-			_E_LOG_DEBUG("Querying %s buffer=%u ...", name, *n_bufs_ptr);
-			_E_XIOCTL(VIDIOC_QUERYBUF, &buf, "Can't query %s buffer=%u", name, *n_bufs_ptr);
-
-			_E_LOG_DEBUG("Mapping %s buffer=%u ...", name, *n_bufs_ptr);
-			if (((*bufs_ptr)[*n_bufs_ptr].data = mmap(
-				NULL,
-				plane.length,
-				PROT_READ | PROT_WRITE,
-				MAP_SHARED,
-				_RUN(fd),
-				plane.m.mem_offset
-			)) == MAP_FAILED) {
-				_E_LOG_PERROR("Can't map %s buffer=%u", name, *n_bufs_ptr);
-				goto error;
-			}
-			assert((*bufs_ptr)[*n_bufs_ptr].data != NULL);
-			(*bufs_ptr)[*n_bufs_ptr].allocated = plane.length;
-
-			_E_LOG_DEBUG("Queuing %s buffer=%u ...", name, *n_bufs_ptr);
-			_E_XIOCTL(VIDIOC_QBUF, &buf, "Can't queue %s buffer=%u", name, *n_bufs_ptr);
-		}
+		return 0;
 	}
 
+	US_CALLOC(*bufs_ptr, req.count);
+	for (*n_bufs_ptr = 0; *n_bufs_ptr < req.count; ++(*n_bufs_ptr)) {
+		struct v4l2_buffer buf = {0};
+		struct v4l2_plane plane = {0};
+		buf.type = type;
+		buf.memory = V4L2_MEMORY_MMAP;
+		buf.index = *n_bufs_ptr;
+		buf.length = 1;
+		buf.m.planes = &plane;
+
+		_E_LOG_DEBUG("Querying %s buffer=%u ...", name, *n_bufs_ptr);
+		_E_XIOCTL(VIDIOC_QUERYBUF, &buf, "Can't query %s buffer=%u", name, *n_bufs_ptr);
+
+		_E_LOG_DEBUG("Mapping %s buffer=%u ...", name, *n_bufs_ptr);
+		if (((*bufs_ptr)[*n_bufs_ptr].data = mmap(
+			NULL, plane.length,
+			PROT_READ | PROT_WRITE, MAP_SHARED,
+			run->fd, plane.m.mem_offset
+		)) == MAP_FAILED) {
+			_E_LOG_PERROR("Can't map %s buffer=%u", name, *n_bufs_ptr);
+			goto error;
+		}
+		assert((*bufs_ptr)[*n_bufs_ptr].data != NULL);
+		(*bufs_ptr)[*n_bufs_ptr].allocated = plane.length;
+
+		_E_LOG_DEBUG("Queuing %s buffer=%u ...", name, *n_bufs_ptr);
+		_E_XIOCTL(VIDIOC_QBUF, &buf, "Can't queue %s buffer=%u", name, *n_bufs_ptr);
+	}
+	_E_LOG_DEBUG("All %s buffers are ready", name);
 	return 0;
-	error:
-		return -1;
+
+error: // Mostly for _E_XIOCTL
+	return -1;
 }
 
 static void _m2m_encoder_cleanup(us_m2m_encoder_s *enc) {
-	if (_RUN(ready)) {
+	us_m2m_encoder_runtime_s *const run = enc->run;
+
+	bool say = false;
+
+	if (run->ready) {
+		say = true;
 #		define STOP_STREAM(x_name, x_type) { \
 				enum v4l2_buf_type m_type_var = x_type; \
 				_E_LOG_DEBUG("Stopping %s ...", x_name); \
-				if (us_xioctl(_RUN(fd), VIDIOC_STREAMOFF, &m_type_var) < 0) { \
+				if (us_xioctl(run->fd, VIDIOC_STREAMOFF, &m_type_var) < 0) { \
 					_E_LOG_PERROR("Can't stop %s", x_name); \
 				} \
 			}
-
 		STOP_STREAM("OUTPUT", V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
 		STOP_STREAM("INPUT", V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
-
 #		undef STOP_STREAM
 	}
 
-#	define DESTROY_BUFFERS(x_name, x_target) { \
-		if (_RUN(x_target##_bufs) != NULL) { \
-			for (unsigned m_index = 0; m_index < _RUN(n_##x_target##_bufs); ++m_index) { \
-				if (_RUN(x_target##_bufs[m_index].allocated) > 0 && _RUN(x_target##_bufs[m_index].data) != NULL) { \
-					if (munmap(_RUN(x_target##_bufs[m_index].data), _RUN(x_target##_bufs[m_index].allocated)) < 0) { \
+#	define DELETE_BUFFERS(x_name, x_target) { \
+		if (run->x_target##_bufs != NULL) { \
+			say = true; \
+			for (uint m_index = 0; m_index < run->n_##x_target##_bufs; ++m_index) { \
+				us_m2m_buffer_s *m_buf = &run->x_target##_bufs[m_index]; \
+				if (m_buf->allocated > 0 && m_buf->data != NULL) { \
+					if (munmap(m_buf->data, m_buf->allocated) < 0) { \
 						_E_LOG_PERROR("Can't unmap %s buffer=%u", #x_name, m_index); \
 					} \
 				} \
 			} \
-			free(_RUN(x_target##_bufs)); \
-			_RUN(x_target##_bufs) = NULL; \
+			US_DELETE(run->x_target##_bufs, free); \
 		} \
-		_RUN(n_##x_target##_bufs) = 0; \
+		run->n_##x_target##_bufs = 0; \
 	}
+	DELETE_BUFFERS("OUTPUT", output);
+	DELETE_BUFFERS("INPUT", input);
+#	undef DELETE_BUFFERS
 
-	DESTROY_BUFFERS("OUTPUT", output);
-	DESTROY_BUFFERS("INPUT", input);
-
-#	undef DESTROY_BUFFERS
-
-	if (_RUN(fd) >= 0) {
-		if (close(_RUN(fd)) < 0) {
+	if (run->fd >= 0) {
+		say = true;
+		if (close(run->fd) < 0) {
 			_E_LOG_PERROR("Can't close encoder device");
 		}
-		_RUN(fd) = -1;
+		run->fd = -1;
 	}
 
-	_RUN(last_online) = -1;
-	_RUN(ready) = false;
+	run->last_online = -1;
+	run->ready = false;
 
-	_E_LOG_DEBUG("Encoder state: ~~~ NOT READY ~~~");
+	if (say) {
+		_E_LOG_INFO("Encoder closed");
+	}
 }
 
 static int _m2m_encoder_compress_raw(us_m2m_encoder_s *enc, const us_frame_s *src, us_frame_s *dest, bool force_key) {
-	assert(_RUN(ready));
+	us_m2m_encoder_runtime_s *const run = enc->run;
 
-	_E_LOG_DEBUG("Compressing new frame; force_key=%d ...", force_key);
+	assert(run->ready);
 
 	if (force_key) {
 		struct v4l2_control ctl = {0};
@@ -401,7 +447,7 @@ static int _m2m_encoder_compress_raw(us_m2m_encoder_s *enc, const us_frame_s *sr
 	input_buf.length = 1;
 	input_buf.m.planes = &input_plane;
 
-	if (_RUN(dma)) {
+	if (run->p_dma) {
 		input_buf.index = 0;
 		input_buf.memory = V4L2_MEMORY_DMABUF;
 		input_buf.field = V4L2_FIELD_NONE;
@@ -411,38 +457,38 @@ static int _m2m_encoder_compress_raw(us_m2m_encoder_s *enc, const us_frame_s *sr
 		input_buf.memory = V4L2_MEMORY_MMAP;
 		_E_LOG_DEBUG("Grabbing INPUT buffer ...");
 		_E_XIOCTL(VIDIOC_DQBUF, &input_buf, "Can't grab INPUT buffer");
-		if (input_buf.index >= _RUN(n_input_bufs)) {
+		if (input_buf.index >= run->n_input_bufs) {
 			_E_LOG_ERROR("V4L2 error: grabbed invalid INPUT: buffer=%u, n_bufs=%u",
-				input_buf.index, _RUN(n_input_bufs));
+				input_buf.index, run->n_input_bufs);
 			goto error;
 		}
 		_E_LOG_DEBUG("Grabbed INPUT buffer=%u", input_buf.index);
 	}
 
-	const uint64_t now = us_get_now_monotonic_u64();
+	const u64 now_ts = us_get_now_monotonic_u64();
 	struct timeval ts = {
-		.tv_sec = now / 1000000,
-		.tv_usec = now % 1000000,
+		.tv_sec = now_ts / 1000000,
+		.tv_usec = now_ts % 1000000,
 	};
 
 	input_buf.timestamp.tv_sec = ts.tv_sec;
 	input_buf.timestamp.tv_usec = ts.tv_usec;
 	input_plane.bytesused = src->used;
 	input_plane.length = src->used;
-	if (!_RUN(dma)) {
-		memcpy(_RUN(input_bufs[input_buf.index].data), src->data, src->used);
+	if (!run->p_dma) {
+		memcpy(run->input_bufs[input_buf.index].data, src->data, src->used);
 	}
 
-	const char *input_name = (_RUN(dma) ? "INPUT-DMA" : "INPUT");
+	const char *input_name = (run->p_dma ? "INPUT-DMA" : "INPUT");
 
-	_E_LOG_DEBUG("Sending%s %s buffer ...", (!_RUN(dma) ? " (releasing)" : ""), input_name);
+	_E_LOG_DEBUG("Sending%s %s buffer ...", (!run->p_dma ? " (releasing)" : ""), input_name);
 	_E_XIOCTL(VIDIOC_QBUF, &input_buf, "Can't send %s buffer", input_name);
 
 	// Для не-DMA отправка буфера по факту являтся освобождением этого буфера
-	bool input_released = !_RUN(dma);
+	bool input_released = !run->p_dma;
 
 	while (true) {
-		struct pollfd enc_poll = {_RUN(fd), POLLIN, 0};
+		struct pollfd enc_poll = {run->fd, POLLIN, 0};
 
 		_E_LOG_DEBUG("Polling encoder ...");
 		if (poll(&enc_poll, 1, 1000) < 0 && errno != EINTR) {
@@ -474,7 +520,7 @@ static int _m2m_encoder_compress_raw(us_m2m_encoder_s *enc, const us_frame_s *sr
 				// входному (с тем же таймстампом).
 				_E_LOG_DEBUG("Need to retry OUTPUT buffer due timestamp mismatch");
 			} else {
-				us_frame_set_data(dest, _RUN(output_bufs[output_buf.index].data), output_plane.bytesused);
+				us_frame_set_data(dest, run->output_bufs[output_buf.index].data, output_plane.bytesused);
 				dest->key = output_buf.flags & V4L2_BUF_FLAG_KEYFRAME;
 				dest->gop = enc->gop;
 				done = true;
@@ -488,10 +534,10 @@ static int _m2m_encoder_compress_raw(us_m2m_encoder_s *enc, const us_frame_s *sr
 			}
 		}
 	}
-
 	return 0;
-	error:
-		return -1;
+
+error: // Mostly for _E_XIOCTL
+	return -1;
 }
 
 #undef _E_XIOCTL

src/ustreamer/m2m.h

@@ -22,65 +22,49 @@
 
 #pragma once
 
-#include <stdlib.h>
-#include <stdbool.h>
-#include <stdint.h>
-#include <string.h>
-#include <math.h>
-#include <fcntl.h>
-#include <poll.h>
-#include <errno.h>
-#include <assert.h>
-
-#include <sys/mman.h>
-
-#include <linux/videodev2.h>
-
-#include "../libs/tools.h"
-#include "../libs/logging.h"
+#include "../libs/types.h"
 #include "../libs/frame.h"
-#include "../libs/xioctl.h"
 
 
 typedef struct {
-	uint8_t	*data;
-	size_t	allocated;
+	u8	*data;
+	uz	allocated;
 } us_m2m_buffer_s;
 
 typedef struct {
 	int				fd;
+	uint			fps_limit;
 	us_m2m_buffer_s	*input_bufs;
-	unsigned		n_input_bufs;
+	uint			n_input_bufs;
 	us_m2m_buffer_s	*output_bufs;
-	unsigned		n_output_bufs;
+	uint			n_output_bufs;
 
-	unsigned		width;
-	unsigned		height;
-	unsigned		input_format;
-	unsigned		stride;
-	bool			dma;
-	bool			ready;
+	uint	p_width;
+	uint	p_height;
+	uint	p_input_format;
+	uint	p_stride;
+	bool	p_dma;
 
-	int				last_online;
+	bool	ready;
+	int		last_online;
 } us_m2m_encoder_runtime_s;
 
 typedef struct {
-	char			*name;
-	char			*path;
-	unsigned		output_format;
-	unsigned		fps;
-	unsigned		bitrate;
-	unsigned		gop;
-	unsigned		quality;
-	bool			allow_dma;
+	char	*name;
+	char	*path;
+	uint	output_format;
+	uint	bitrate;
+	uint	gop;
+	uint	quality;
+	bool	allow_dma;
 
 	us_m2m_encoder_runtime_s *run;
 } us_m2m_encoder_s;
 
 
-us_m2m_encoder_s *us_m2m_h264_encoder_init(const char *name, const char *path, unsigned bitrate, unsigned gop);
-us_m2m_encoder_s *us_m2m_mjpeg_encoder_init(const char *name, const char *path, unsigned quality);
-us_m2m_encoder_s *us_m2m_jpeg_encoder_init(const char *name, const char *path, unsigned quality);
+us_m2m_encoder_s *us_m2m_h264_encoder_init(const char *name, const char *path, uint bitrate, uint gop);
+us_m2m_encoder_s *us_m2m_mjpeg_encoder_init(const char *name, const char *path, uint quality);
+us_m2m_encoder_s *us_m2m_jpeg_encoder_init(const char *name, const char *path, uint quality);
 void us_m2m_encoder_destroy(us_m2m_encoder_s *enc);
 
 int us_m2m_encoder_compress(us_m2m_encoder_s *enc, const us_frame_s *src, us_frame_s *dest, bool force_key);

src/ustreamer/main.c

@@ -22,16 +22,16 @@
 
 #include <stdio.h>
 #include <stdbool.h>
-#include <signal.h>
 
 #include <pthread.h>
 
 #include "../libs/tools.h"
 #include "../libs/threading.h"
 #include "../libs/logging.h"
+#include "../libs/device.h"
+#include "../libs/signal.h"
 
 #include "options.h"
-#include "device.h"
 #include "encoder.h"
 #include "stream.h"
 #include "http/server.h"
@@ -52,15 +52,17 @@ static void _block_thread_signals(void) {
 	assert(!pthread_sigmask(SIG_BLOCK, &mask, NULL));
 }
 
-static void *_stream_loop_thread(UNUSED void *arg) {
-	US_THREAD_RENAME("stream");
+static void *_stream_loop_thread(void *arg) {
+	(void)arg;
+	US_THREAD_SETTLE("stream");
 	_block_thread_signals();
 	us_stream_loop(_g_stream);
 	return NULL;
 }
 
-static void *_server_loop_thread(UNUSED void *arg) {
-	US_THREAD_RENAME("http");
+static void *_server_loop_thread(void *arg) {
+	(void)arg;
+	US_THREAD_SETTLE("http");
 	_block_thread_signals();
 	us_server_loop(_g_server);
 	return NULL;
@@ -74,24 +76,6 @@ static void _signal_handler(int signum) {
 	us_server_loop_break(_g_server);
 }
 
-static void _install_signal_handlers(void) {
-	struct sigaction sig_act = {0};
-
-	assert(!sigemptyset(&sig_act.sa_mask));
-	sig_act.sa_handler = _signal_handler;
-	assert(!sigaddset(&sig_act.sa_mask, SIGINT));
-	assert(!sigaddset(&sig_act.sa_mask, SIGTERM));
-
-	US_LOG_DEBUG("Installing SIGINT handler ...");
-	assert(!sigaction(SIGINT, &sig_act, NULL));
-
-	US_LOG_DEBUG("Installing SIGTERM handler ...");
-	assert(!sigaction(SIGTERM, &sig_act, NULL));
-
-	US_LOG_DEBUG("Ignoring SIGPIPE ...");
-	assert(signal(SIGPIPE, SIG_IGN) != SIG_ERR);
-}
-
 int main(int argc, char *argv[]) {
 	assert(argc >= 0);
 	int exit_code = 0;
@@ -110,7 +94,7 @@ int main(int argc, char *argv[]) {
 		us_gpio_init();
 #		endif
 
-		_install_signal_handlers();
+		us_install_signals_handler(_signal_handler, true);
 
 		if ((exit_code = us_server_listen(_g_server)) == 0) {
 #			ifdef WITH_GPIO

src/ustreamer/options.c

@@ -250,12 +250,10 @@ us_options_s *us_options_init(unsigned argc, char *argv[]) {
 }
 
 void us_options_destroy(us_options_s *options) {
-	US_DELETE(options->sink, us_memsink_destroy);
+	US_DELETE(options->jpeg_sink, us_memsink_destroy);
 	US_DELETE(options->raw_sink, us_memsink_destroy);
 	US_DELETE(options->h264_sink, us_memsink_destroy);
 
-	US_DELETE(options->blank, us_frame_destroy);
-
 	for (unsigned index = 0; index < options->argc; ++index) {
 		free(options->argv_copy[index]);
 	}
@@ -298,11 +296,13 @@ int options_parse(us_options_s *options, us_device_s *dev, us_encoder_s *enc, us
 			break; \
 		}
 
-#	define OPT_PARSE(x_name, x_dest, x_func, x_invalid, x_available) { \
-			if ((x_dest = x_func(optarg)) == x_invalid) { \
+#	define OPT_PARSE_ENUM(x_name, x_dest, x_func, x_available) { \
+			const int m_value = x_func(optarg); \
+			if (m_value < 0) { \
 				printf("Unknown " x_name ": %s; available: %s\n", optarg, x_available); \
 				return -1; \
 			} \
+			x_dest = m_value; \
 			break; \
 		}
 
@@ -332,15 +332,13 @@ int options_parse(us_options_s *options, us_device_s *dev, us_encoder_s *enc, us
 			break; \
 		}
 
-	char *blank_path = NULL;
-
 #	define ADD_SINK(x_prefix) \
 		char *x_prefix##_name = NULL; \
 		mode_t x_prefix##_mode = 0660; \
 		bool x_prefix##_rm = false; \
 		unsigned x_prefix##_client_ttl = 10; \
 		unsigned x_prefix##_timeout = 1;
-	ADD_SINK(sink);
+	ADD_SINK(jpeg_sink);
 	ADD_SINK(raw_sink);
 	ADD_SINK(h264_sink);
 #	undef ADD_SINK
@@ -359,10 +357,10 @@ int options_parse(us_options_s *options, us_device_s *dev, us_encoder_s *enc, us
 			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, us_device_parse_format, US_FORMAT_UNKNOWN, US_FORMATS_STR);
+			case _O_FORMAT:				OPT_PARSE_ENUM("pixel format", dev->format, us_device_parse_format, US_FORMATS_STR);
 #			pragma GCC diagnostic pop
-			case _O_TV_STANDARD:		OPT_PARSE("TV standard", dev->standard, us_device_parse_standard, US_STANDARD_UNKNOWN, US_STANDARDS_STR);
-			case _O_IO_METHOD:			OPT_PARSE("IO method", dev->io_method, us_device_parse_io_method, US_IO_METHOD_UNKNOWN, US_IO_METHODS_STR);
+			case _O_TV_STANDARD:		OPT_PARSE_ENUM("TV standard", dev->standard, us_device_parse_standard, US_STANDARDS_STR);
+			case _O_IO_METHOD:			OPT_PARSE_ENUM("IO method", dev->io_method, us_device_parse_io_method, US_IO_METHODS_STR);
 			case _O_DESIRED_FPS:		OPT_NUMBER("--desired-fps", dev->desired_fps, 0, US_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);
@@ -370,10 +368,10 @@ int options_parse(us_options_s *options, us_device_s *dev, us_encoder_s *enc, us
 			case _O_BUFFERS:			OPT_NUMBER("--buffers", dev->n_bufs, 1, 32, 0);
 			case _O_WORKERS:			OPT_NUMBER("--workers", enc->n_workers, 1, 32, 0);
 			case _O_QUALITY:			OPT_NUMBER("--quality", dev->jpeg_quality, 1, 100, 0);
-			case _O_ENCODER:			OPT_PARSE("encoder type", enc->type, us_encoder_parse_type, US_ENCODER_TYPE_UNKNOWN, ENCODER_TYPES_STR);
+			case _O_ENCODER:			OPT_PARSE_ENUM("encoder type", enc->type, us_encoder_parse_type, ENCODER_TYPES_STR);
 			case _O_GLITCHED_RESOLUTIONS: break; // Deprecated
-			case _O_BLANK:				OPT_SET(blank_path, optarg);
-			case _O_LAST_AS_BLANK:		OPT_NUMBER("--last-as-blank", stream->last_as_blank, 0, 86400, 0);
+			case _O_BLANK:				break; // Deprecated
+			case _O_LAST_AS_BLANK:		break; // Deprecated
 			case _O_SLOWDOWN:			OPT_SET(stream->slowdown, true);
 			case _O_DEVICE_TIMEOUT:		OPT_NUMBER("--device-timeout", dev->timeout, 1, 60, 0);
 			case _O_DEVICE_ERROR_DELAY:	OPT_NUMBER("--device-error-delay", stream->error_delay, 1, 60, 0);
@@ -438,7 +436,7 @@ int options_parse(us_options_s *options, us_device_s *dev, us_encoder_s *enc, us
 				case _O_##x_up##_RM:			OPT_SET(x_lp##_rm, true); \
 				case _O_##x_up##_CLIENT_TTL:	OPT_NUMBER("--" #x_opt "sink-client-ttl", x_lp##_client_ttl, 1, 60, 0); \
 				case _O_##x_up##_TIMEOUT:		OPT_NUMBER("--" #x_opt "sink-timeout", x_lp##_timeout, 1, 60, 0);
-			ADD_SINK("", sink, SINK)
+			ADD_SINK("", jpeg_sink, SINK)
 			ADD_SINK("raw-", raw_sink, RAW_SINK)
 			ADD_SINK("h264-", h264_sink, H264_SINK)
 			case _O_H264_BITRATE:			OPT_NUMBER("--h264-bitrate", stream->h264_bitrate, 25, 20000, 0);
@@ -461,7 +459,7 @@ int options_parse(us_options_s *options, us_device_s *dev, us_encoder_s *enc, us
 				};
 				break;
 #			endif
-			case _O_EXIT_ON_NO_CLIENTS:		OPT_NUMBER("--exit-on-no-clients", server->exit_on_no_clients, 0, 86400, 0);
+			case _O_EXIT_ON_NO_CLIENTS:		OPT_NUMBER("--exit-on-no-clients", stream->exit_on_no_clients, 0, 86400, 0);
 #			ifdef WITH_SETPROCTITLE
 			case _O_PROCESS_NAME_PREFIX:	OPT_SET(process_name_prefix, optarg);
 #			endif
@@ -485,9 +483,6 @@ int options_parse(us_options_s *options, us_device_s *dev, us_encoder_s *enc, us
 
 	US_LOG_INFO("Starting PiKVM uStreamer %s ...", US_VERSION);
 
-	options->blank = us_blank_frame_init(blank_path);
-	stream->blank = options->blank;
-
 #	define ADD_SINK(x_label, x_prefix) { \
 			if (x_prefix##_name && x_prefix##_name[0] != '\0') { \
 				options->x_prefix = us_memsink_init( \
@@ -502,7 +497,7 @@ int options_parse(us_options_s *options, us_device_s *dev, us_encoder_s *enc, us
 			} \
 			stream->x_prefix = options->x_prefix; \
 		}
-	ADD_SINK("JPEG", sink);
+	ADD_SINK("JPEG", jpeg_sink);
 	ADD_SINK("RAW", raw_sink);
 	ADD_SINK("H264", h264_sink);
 #	undef ADD_SINK
@@ -629,13 +624,8 @@ static void _help(FILE *fp, const us_device_s *dev, const us_encoder_s *enc, con
 	SAY("                                             * M2M-IMAGE  ── GPU-accelerated JPEG encoding using V4L2 M2M image interface;");
 	SAY("                                             * NOOP  ─────── Don't compress MJPEG stream (do nothing).\n");
 	SAY("    -g|--glitched-resolutions <WxH,...>  ─ It doesn't do anything. Still here for compatibility.\n");
-	SAY("    -k|--blank <path>  ─────────────────── Path to JPEG file that will be shown when the device is disconnected");
-	SAY("                                           during the streaming. Default: black screen 640x480 with 'NO SIGNAL'.\n");
-	SAY("    -K|--last-as-blank <sec>  ──────────── Show the last frame received from the camera after it was disconnected,");
-	SAY("                                           but no more than specified time (or endlessly if 0 is specified).");
-	SAY("                                           If the device has not yet been online, display 'NO SIGNAL' or the image");
-	SAY("                                           specified by option --blank. Default: disabled.");
-	SAY("                                           Note: currently this option has no effect on memory sinks.\n");
+	SAY("    -k|--blank <path>  ─────────────────── It doesn't do anything. Still here for compatibility.\n");
+	SAY("    -K|--last-as-blank <sec>  ──────────── It doesn't do anything. Still here for compatibility.\n");
 	SAY("    -l|--slowdown  ─────────────────────── Slowdown capturing to 1 FPS or less when no stream or sink clients");
 	SAY("                                           are connected. Useful to reduce CPU consumption. Default: disabled.\n");
 	SAY("    --device-timeout <sec>  ────────────── Timeout for device querying. Default: %u.\n", dev->timeout);

src/ustreamer/options.h

@@ -27,6 +27,7 @@
 #include <stdbool.h>
 #include <string.h>
 #include <strings.h>
+#include <ctype.h>
 #include <limits.h>
 #include <getopt.h>
 #include <errno.h>
@@ -38,10 +39,9 @@
 #include "../libs/frame.h"
 #include "../libs/memsink.h"
 #include "../libs/options.h"
+#include "../libs/device.h"
 
-#include "device.h"
 #include "encoder.h"
-#include "blank.h"
 #include "stream.h"
 #include "http/server.h"
 #ifdef WITH_GPIO
@@ -53,8 +53,7 @@ typedef struct {
 	unsigned		argc;
 	char			**argv;
 	char			**argv_copy;
-	us_frame_s		*blank;
-	us_memsink_s	*sink;
+	us_memsink_s	*jpeg_sink;
 	us_memsink_s	*raw_sink;
 	us_memsink_s	*h264_sink;
 } us_options_s;

src/ustreamer/stream.c

@@ -22,338 +22,558 @@
 
 #include "stream.h"
 
+#include <stdlib.h>
+#include <stdatomic.h>
+#include <unistd.h>
+#include <errno.h>
+#include <assert.h>
 
-static us_workers_pool_s *_stream_init_loop(us_stream_s *stream);
-static us_workers_pool_s *_stream_init_one(us_stream_s *stream);
-static void _stream_expose_frame(us_stream_s *stream, us_frame_s *frame, unsigned captured_fps);
+#include <pthread.h>
+
+#include "../libs/types.h"
+#include "../libs/tools.h"
+#include "../libs/threading.h"
+#include "../libs/process.h"
+#include "../libs/logging.h"
+#include "../libs/ring.h"
+#include "../libs/frame.h"
+#include "../libs/memsink.h"
+#include "../libs/device.h"
+
+#include "blank.h"
+#include "encoder.h"
+#include "workers.h"
+#include "h264.h"
+#ifdef WITH_GPIO
+#	include "gpio/gpio.h"
+#endif
 
 
-#define _RUN(x_next) stream->run->x_next
+typedef struct {
+	pthread_t		tid;
+	us_device_s		*dev;
+	us_queue_s		*queue;
+	pthread_mutex_t	*mutex;
+	atomic_bool		*stop;
+} _releaser_context_s;
 
-#define _SINK_PUT(x_sink, x_frame) { \
-		if (stream->x_sink && us_memsink_server_check(stream->x_sink, x_frame)) {\
-			bool m_key_requested; /* Unused */ \
-			us_memsink_server_put(stream->x_sink, x_frame, &m_key_requested); \
-		} \
-	}
+typedef struct {
+	pthread_t	tid;
+	us_queue_s	*queue;
+	us_stream_s	*stream;
+	atomic_bool	*stop;
+} _worker_context_s;
 
-#define _H264_PUT(x_frame, x_force_key) { \
-		if (_RUN(h264)) { \
-			us_h264_stream_process(_RUN(h264), x_frame, x_force_key); \
-		} \
-	}
+
+static void _stream_set_capture_state(us_stream_s *stream, uint width, uint height, bool online, uint captured_fps);
+
+static void *_releaser_thread(void *v_ctx);
+static void *_jpeg_thread(void *v_ctx);
+static void *_h264_thread(void *v_ctx);
+static void *_raw_thread(void *v_ctx);
+
+static us_hw_buffer_s *_get_latest_hw(us_queue_s *queue);
+
+static bool _stream_has_jpeg_clients_cached(us_stream_s *stream);
+static bool _stream_has_any_clients_cached(us_stream_s *stream);
+static int _stream_init_loop(us_stream_s *stream);
+static void _stream_expose_jpeg(us_stream_s *stream, const us_frame_s *frame);
+static void _stream_expose_raw(us_stream_s *stream, const us_frame_s *frame);
+static void _stream_check_suicide(us_stream_s *stream);
 
 
 us_stream_s *us_stream_init(us_device_s *dev, us_encoder_s *enc) {
 	us_stream_runtime_s *run;
 	US_CALLOC(run, 1);
+	US_RING_INIT_WITH_ITEMS(run->http_jpeg_ring, 4, us_frame_init);
+	atomic_init(&run->http_has_clients, false);
+	atomic_init(&run->http_snapshot_requested, 0);
+	atomic_init(&run->http_last_request_ts, 0);
+	atomic_init(&run->http_capture_state, 0);
 	atomic_init(&run->stop, false);
-
-	us_video_s *video;
-	US_CALLOC(video, 1);
-	video->frame = us_frame_init();
-	atomic_init(&video->updated, false);
-	US_MUTEX_INIT(video->mutex);
-	atomic_init(&video->has_clients, false);
-	run->video = video;
+	run->blank = us_blank_init();
 
 	us_stream_s *stream;
 	US_CALLOC(stream, 1);
 	stream->dev = dev;
 	stream->enc = enc;
-	stream->last_as_blank = -1;
 	stream->error_delay = 1;
 	stream->h264_bitrate = 5000; // Kbps
 	stream->h264_gop = 30;
 	stream->run = run;
+
+	us_blank_draw(run->blank, "< NO SIGNAL >", dev->width, dev->height);
+	_stream_set_capture_state(stream, dev->width, dev->height, false, 0);
 	return stream;
 }
 
 void us_stream_destroy(us_stream_s *stream) {
-	US_MUTEX_DESTROY(_RUN(video->mutex));
-	us_frame_destroy(_RUN(video->frame));
-	free(_RUN(video));
+	us_blank_destroy(stream->run->blank);
+	US_RING_DELETE_WITH_ITEMS(stream->run->http_jpeg_ring, us_frame_destroy);
 	free(stream->run);
 	free(stream);
 }
 
 void us_stream_loop(us_stream_s *stream) {
-	assert(stream->blank != NULL);
+	us_stream_runtime_s *const run = stream->run;
+	us_device_s *const dev = stream->dev;
 
-	US_LOG_INFO("Using V4L2 device: %s", stream->dev->path);
-	US_LOG_INFO("Using desired FPS: %u", stream->dev->desired_fps);
+	US_LOG_INFO("Using V4L2 device: %s", dev->path);
+	US_LOG_INFO("Using desired FPS: %u", dev->desired_fps);
+
+	atomic_store(&run->http_last_request_ts, us_get_now_monotonic());
 
 	if (stream->h264_sink != NULL) {
-		_RUN(h264) = us_h264_stream_init(stream->h264_sink, stream->h264_m2m_path, stream->h264_bitrate, stream->h264_gop);
+		run->h264 = us_h264_stream_init(stream->h264_sink, stream->h264_m2m_path, stream->h264_bitrate, stream->h264_gop);
 	}
 
-	for (us_workers_pool_s *pool; (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;
+	while (!_stream_init_loop(stream)) {
+		atomic_bool threads_stop;
+		atomic_init(&threads_stop, false);
+
+		pthread_mutex_t release_mutex;
+		US_MUTEX_INIT(release_mutex);
+		const uint n_releasers = dev->run->n_bufs;
+		_releaser_context_s *releasers;
+		US_CALLOC(releasers, n_releasers);
+		for (uint index = 0; index < n_releasers; ++index) {
+			_releaser_context_s *ctx = &releasers[index];
+			ctx->dev = dev;
+			ctx->queue = us_queue_init(1);
+			ctx->mutex = &release_mutex;
+			ctx->stop = &threads_stop;
+			US_THREAD_CREATE(ctx->tid, _releaser_thread, ctx);
+		}
+
+		_worker_context_s jpeg_ctx = {
+			.queue = us_queue_init(dev->run->n_bufs),
+			.stream = stream,
+			.stop = &threads_stop,
+		};
+		US_THREAD_CREATE(jpeg_ctx.tid, _jpeg_thread, &jpeg_ctx);
+
+		_worker_context_s h264_ctx;
+		if (run->h264 != NULL) {
+			h264_ctx.queue = us_queue_init(dev->run->n_bufs);
+			h264_ctx.stream = stream;
+			h264_ctx.stop = &threads_stop;
+			US_THREAD_CREATE(h264_ctx.tid, _h264_thread, &h264_ctx);
+		}
+
+		_worker_context_s raw_ctx;
+		if (stream->raw_sink != NULL) {
+			raw_ctx.queue = us_queue_init(2);
+			raw_ctx.stream = stream;
+			raw_ctx.stop = &threads_stop;
+			US_THREAD_CREATE(raw_ctx.tid, _raw_thread, &raw_ctx);
+		}
+
+		uint captured_fps_accum = 0;
+		sll captured_fps_ts = 0;
+		uint captured_fps = 0;
 
 		US_LOG_INFO("Capturing ...");
 
-		while (!atomic_load(&_RUN(stop))) {
-			US_SEP_DEBUG('-');
-			US_LOG_DEBUG("Waiting for worker ...");
-
-			us_worker_s *const ready_wr = us_workers_pool_wait(pool);
-			us_encoder_job_s *const ready_job = (us_encoder_job_s *)(ready_wr->job);
-
-			if (ready_job->hw != NULL) {
-				if (us_device_release_buffer(stream->dev, ready_job->hw) < 0) {
-					ready_wr->job_failed = true;
-				}
-				ready_job->hw = NULL;
-
-				if (!ready_wr->job_failed) {
-					if (ready_wr->job_timely) {
-						_stream_expose_frame(stream, ready_job->dest, captured_fps);
-						US_LOG_PERF("##### Encoded JPEG exposed; worker=%s, latency=%.3Lf",
-							ready_wr->name, us_get_now_monotonic() - ready_job->dest->grab_ts);
-					} else {
-						US_LOG_PERF("----- Encoded JPEG dropped; worker=%s", ready_wr->name);
-					}
-				} else {
-					break;
-				}
+		uint slowdown_count = 0;
+		while (!atomic_load(&run->stop) && !atomic_load(&threads_stop)) {
+			us_hw_buffer_s *hw;
+			const int buf_index = us_device_grab_buffer(dev, &hw);
+			switch (buf_index) {
+				case -2: continue; // Broken frame
+				case -1: goto close; // Error
 			}
+			assert(buf_index >= 0);
 
-			bool h264_force_key = false;
-			if (stream->slowdown) {
-				unsigned slc = 0;
-				for (; slc < 10 && !atomic_load(&_RUN(stop)) && !us_stream_has_clients(stream); ++slc) {
-					usleep(100000);
-				}
-				h264_force_key = (slc == 10);
+			const sll now_sec_ts = us_floor_ms(us_get_now_monotonic());
+			if (now_sec_ts != captured_fps_ts) {
+				captured_fps = captured_fps_accum;
+				captured_fps_accum = 0;
+				captured_fps_ts = now_sec_ts;
+				US_LOG_PERF_FPS("A new second has come; captured_fps=%u", captured_fps);
 			}
+			captured_fps_accum += 1;
 
-			if (atomic_load(&_RUN(stop))) {
-				break;
+			_stream_set_capture_state(stream, dev->run->width, dev->run->height, true, captured_fps);
+#			ifdef WITH_GPIO
+			us_gpio_set_stream_online(true);
+#			endif
+
+			us_device_buffer_incref(hw); // JPEG
+			us_queue_put(jpeg_ctx.queue, hw, 0);
+			if (run->h264 != NULL) {
+				us_device_buffer_incref(hw); // H264
+				us_queue_put(h264_ctx.queue, hw, 0);
 			}
+			if (stream->raw_sink != NULL) {
+				us_device_buffer_incref(hw); // RAW
+				us_queue_put(raw_ctx.queue, hw, 0);
+			}
+			us_queue_put(releasers[buf_index].queue, hw, 0); // Plan to release
 
-			bool has_read;
-			bool has_write;
-			bool has_error;
-			const int selected = us_device_select(stream->dev, &has_read, &has_write, &has_error);
-
-			if (selected < 0) {
-				if (errno != EINTR) {
-					US_LOG_PERROR("Mainloop select() error");
-					break;
-				}
-			} else if (selected == 0) { // Persistent timeout
-#				ifdef WITH_GPIO
-				us_gpio_set_stream_online(false);
-#				endif
-			} else {
-				if (has_read) {
-					US_LOG_DEBUG("Frame is ready");
-
-#					ifdef WITH_GPIO
-					us_gpio_set_stream_online(true);
-#					endif
-
-					const long double now = us_get_now_monotonic();
-					const long long now_second = us_floor_ms(now);
-
-					us_hw_buffer_s *hw;
-					const int buf_index = us_device_grab_buffer(stream->dev, &hw);
-
-					if (buf_index >= 0) {
-						if (now < grab_after) {
-							fluency_passed += 1;
-							US_LOG_VERBOSE("Passed %u frames for fluency: now=%.03Lf, grab_after=%.03Lf",
-								fluency_passed, now, grab_after);
-							if (us_device_release_buffer(stream->dev, hw) < 0) {
-								break;
-							}
-						} else {
-							fluency_passed = 0;
-
-							if (now_second != captured_fps_second) {
-								captured_fps = captured_fps_accum;
-								captured_fps_accum = 0;
-								captured_fps_second = now_second;
-								US_LOG_PERF_FPS("A new second has come; captured_fps=%u", captured_fps);
-							}
-							captured_fps_accum += 1;
-
-							const long double fluency_delay = us_workers_pool_get_fluency_delay(pool, ready_wr);
-							grab_after = now + fluency_delay;
-							US_LOG_VERBOSE("Fluency: delay=%.03Lf, grab_after=%.03Lf", fluency_delay, grab_after);
-
-							ready_job->hw = hw;
-							us_workers_pool_assign(pool, ready_wr);
-							US_LOG_DEBUG("Assigned new frame in buffer=%d to worker=%s", buf_index, ready_wr->name);
-
-							_SINK_PUT(raw_sink, &hw->raw);
-							_H264_PUT(&hw->raw, h264_force_key);
-						}
-					} else if (buf_index != -2) { // -2 for broken frame
-						break;
-					}
-				}
-
-				// Это условие было добавлено из параноидальных соображений, и мы ни разу не сталкивались
-				// с подобными ошибками, кроме случая с libcamerify, который генерит эвенты на запись.
-				// Судя по всему, игнорирование has_write не делает никому плохо.
-				/*if (has_write) {
-					US_LOG_ERROR("Got unexpected writing event, seems device was disconnected");
-					break;
-				}*/
-
-				if (has_error) {
-					US_LOG_INFO("Got V4L2 event");
-					if (us_device_consume_event(stream->dev) < 0) {
-						break;
-					}
+			// Мы не обновляем здесь состояние синков, потому что это происходит внутри обслуживающих их потоков
+			_stream_check_suicide(stream);
+			if (stream->slowdown && !_stream_has_any_clients_cached(stream)) {
+				usleep(100 * 1000);
+				slowdown_count = (slowdown_count + 1) % 10;
+				if (slowdown_count > 0) {
+					continue;
 				}
 			}
 		}
 
-		us_workers_pool_destroy(pool);
-		us_device_switch_capturing(stream->dev, false);
-		us_device_close(stream->dev);
+	close:
+		atomic_store(&threads_stop, true);
 
-#		ifdef WITH_GPIO
-		us_gpio_set_stream_online(false);
-#		endif
+		if (stream->raw_sink != NULL) {
+			US_THREAD_JOIN(raw_ctx.tid);
+			us_queue_destroy(raw_ctx.queue);
+		}
+
+		if (run->h264 != NULL) {
+			US_THREAD_JOIN(h264_ctx.tid);
+			us_queue_destroy(h264_ctx.queue);
+		}
+
+		US_THREAD_JOIN(jpeg_ctx.tid);
+		us_queue_destroy(jpeg_ctx.queue);
+
+		for (uint index = 0; index < n_releasers; ++index) {
+			US_THREAD_JOIN(releasers[index].tid);
+			us_queue_destroy(releasers[index].queue);
+		}
+		free(releasers);
+		US_MUTEX_DESTROY(release_mutex);
+
+		atomic_store(&threads_stop, false);
+
+		us_encoder_close(stream->enc);
+		us_device_close(dev);
+
+		if (!atomic_load(&run->stop)) {
+			US_SEP_INFO('=');
+		}
 	}
 
-	US_DELETE(_RUN(h264), us_h264_stream_destroy);
+	US_DELETE(run->h264, us_h264_stream_destroy);
 }
 
 void us_stream_loop_break(us_stream_s *stream) {
-	atomic_store(&_RUN(stop), true);
+	atomic_store(&stream->run->stop, true);
 }
 
-bool us_stream_has_clients(us_stream_s *stream) {
+void us_stream_get_capture_state(us_stream_s *stream, uint *width, uint *height, bool *online, uint *captured_fps) {
+	const u64 state = atomic_load(&stream->run->http_capture_state);
+	*width = state & 0xFFFF;
+	*height = (state >> 16) & 0xFFFF;
+	*captured_fps = (state >> 32) & 0xFFFF;
+	*online = (state >> 48) & 1;
+}
+
+void _stream_set_capture_state(us_stream_s *stream, uint width, uint height, bool online, uint captured_fps) {
+	const u64 state = (
+		(u64)(width & 0xFFFF)
+		| ((u64)(height & 0xFFFF) << 16)
+		| ((u64)(captured_fps & 0xFFFF) << 32)
+		| ((u64)(online ? 1 : 0) << 48)
+	);
+	atomic_store(&stream->run->http_capture_state, state);
+}
+
+static void *_releaser_thread(void *v_ctx) {
+	US_THREAD_SETTLE("str_rel")
+	_releaser_context_s *ctx = v_ctx;
+
+	while (!atomic_load(ctx->stop)) {
+		us_hw_buffer_s *hw;
+		if (us_queue_get(ctx->queue, (void**)&hw, 0.1) < 0) {
+			continue;
+		}
+
+		while (atomic_load(&hw->refs) > 0) {
+			if (atomic_load(ctx->stop)) {
+				goto done;
+			}
+			usleep(5 * 1000);
+		}
+
+		US_MUTEX_LOCK(*ctx->mutex);
+		const int released = us_device_release_buffer(ctx->dev, hw);
+		US_MUTEX_UNLOCK(*ctx->mutex);
+		if (released < 0) {
+			goto done;
+		}
+	}
+
+done:
+	atomic_store(ctx->stop, true); // Stop all other guys on error
+	return NULL;
+}
+
+static void *_jpeg_thread(void *v_ctx) {
+	US_THREAD_SETTLE("str_jpeg")
+	_worker_context_s *ctx = v_ctx;
+	us_stream_s *stream = ctx->stream;
+
+	ldf grab_after_ts = 0;
+	uint fluency_passed = 0;
+
+	while (!atomic_load(ctx->stop)) {
+		us_worker_s *const ready_wr = us_workers_pool_wait(stream->enc->run->pool);
+		us_encoder_job_s *const ready_job = ready_wr->job;
+
+		if (ready_job->hw != NULL) {
+			us_device_buffer_decref(ready_job->hw);
+			ready_job->hw = NULL;
+			if (ready_wr->job_failed) {
+				// pass
+			} else if (ready_wr->job_timely) {
+				_stream_expose_jpeg(stream, ready_job->dest);
+				if (atomic_load(&stream->run->http_snapshot_requested) > 0) { // Process real snapshots
+					atomic_fetch_sub(&stream->run->http_snapshot_requested, 1);
+				}
+				US_LOG_PERF("JPEG: ##### Encoded JPEG exposed; worker=%s, latency=%.3Lf",
+					ready_wr->name, us_get_now_monotonic() - ready_job->dest->grab_ts);
+			} else {
+				US_LOG_PERF("JPEG: ----- Encoded JPEG dropped; worker=%s", ready_wr->name);
+			}
+		}
+
+		us_hw_buffer_s *hw = _get_latest_hw(ctx->queue);
+		if (hw == NULL) {
+			continue;
+		}
+
+		const bool update_required = (stream->jpeg_sink != NULL && us_memsink_server_check(stream->jpeg_sink, NULL));
+		if (!update_required && !_stream_has_jpeg_clients_cached(stream)) {
+			US_LOG_VERBOSE("JPEG: Passed encoding because nobody is watching");
+			us_device_buffer_decref(hw);
+			continue;
+		}
+
+		const ldf now_ts = us_get_now_monotonic();
+		if (now_ts < grab_after_ts) {
+			fluency_passed += 1;
+			US_LOG_VERBOSE("JPEG: Passed %u frames for fluency: now=%.03Lf, grab_after=%.03Lf",
+				fluency_passed, now_ts, grab_after_ts);
+			us_device_buffer_decref(hw);
+			continue;
+		}
+		fluency_passed = 0;
+
+		const ldf fluency_delay = us_workers_pool_get_fluency_delay(stream->enc->run->pool, ready_wr);
+		grab_after_ts = now_ts + fluency_delay;
+		US_LOG_VERBOSE("JPEG: Fluency: delay=%.03Lf, grab_after=%.03Lf", fluency_delay, grab_after_ts);
+
+		ready_job->hw = hw;
+		us_workers_pool_assign(stream->enc->run->pool, ready_wr);
+		US_LOG_DEBUG("JPEG: Assigned new frame in buffer=%d to worker=%s", hw->buf.index, ready_wr->name);
+	}
+	return NULL;
+}
+
+static void *_h264_thread(void *v_ctx) {
+	US_THREAD_SETTLE("str_h264");
+	_worker_context_s *ctx = v_ctx;
+	us_h264_stream_s *h264 = ctx->stream->run->h264;
+
+	ldf grab_after_ts = 0;
+	ldf last_encode_ts = us_get_now_monotonic();
+
+	while (!atomic_load(ctx->stop)) {
+		us_hw_buffer_s *hw = _get_latest_hw(ctx->queue);
+		if (hw == NULL) {
+			continue;
+		}
+
+		if (!us_memsink_server_check(h264->sink, NULL)) {
+			us_device_buffer_decref(hw);
+			US_LOG_VERBOSE("H264: Passed encoding because nobody is watching");
+			continue;
+		}
+
+		if (hw->raw.grab_ts < grab_after_ts) {
+			us_device_buffer_decref(hw);
+			US_LOG_VERBOSE("H264: Passed encoding for FPS limit: %u", h264->enc->run->fps_limit);
+			continue;
+		}
+
+		// Форсим кейфрейм, если от захвата давно не было фреймов
+		const ldf now_ts = us_get_now_monotonic();
+		const bool force_key = (last_encode_ts + 0.5 < now_ts);
+		us_h264_stream_process(h264, &hw->raw, force_key);
+		last_encode_ts = now_ts;
+
+		// M2M-енкодер увеличивает задержку на 100 милисекунд при 1080p, если скормить ему больше 30 FPS.
+		// Поэтому у нас есть два режима: 60 FPS для маленьких видео и 30 для 1920x1080(1200).
+		// Следующй фрейм захватывается не раньше, чем это требуется по FPS, минус небольшая
+		// погрешность (если захват неравномерный) - немного меньше 1/60, и примерно треть от 1/30.
+		const ldf frame_interval = (ldf)1 / h264->enc->run->fps_limit;
+		grab_after_ts = hw->raw.grab_ts + frame_interval - 0.01;
+
+		us_device_buffer_decref(hw);
+	}
+	return NULL;
+}
+
+static void *_raw_thread(void *v_ctx) {
+	US_THREAD_SETTLE("str_raw");
+	_worker_context_s *ctx = v_ctx;
+
+	while (!atomic_load(ctx->stop)) {
+		us_hw_buffer_s *hw = _get_latest_hw(ctx->queue);
+		if (hw == NULL) {
+			continue;
+		}
+
+		if (!us_memsink_server_check(ctx->stream->raw_sink, NULL)) {
+			us_device_buffer_decref(hw);
+			US_LOG_VERBOSE("RAW: Passed publishing because nobody is watching");
+			continue;
+		}
+
+		us_memsink_server_put(ctx->stream->raw_sink, &hw->raw, false);
+		us_device_buffer_decref(hw);
+	}
+	return NULL;
+}
+
+static us_hw_buffer_s *_get_latest_hw(us_queue_s *queue) {
+	us_hw_buffer_s *hw;
+	if (us_queue_get(queue, (void**)&hw, 0.1) < 0) {
+		return NULL;
+	}
+	while (!us_queue_is_empty(queue)) { // Берем только самый свежий кадр
+		us_device_buffer_decref(hw);
+		assert(!us_queue_get(queue, (void**)&hw, 0));
+	}
+	return hw;
+}
+
+static bool _stream_has_jpeg_clients_cached(us_stream_s *stream) {
+	const us_stream_runtime_s *const run = stream->run;
 	return (
-		atomic_load(&_RUN(video->has_clients))
-		// has_clients синков НЕ обновляются в реальном времени
-		|| (stream->sink != NULL && atomic_load(&stream->sink->has_clients))
-		|| (_RUN(h264) != NULL && /*_RUN(h264->sink) == NULL ||*/ atomic_load(&_RUN(h264->sink->has_clients)))
+		atomic_load(&run->http_has_clients)
+		|| (atomic_load(&run->http_snapshot_requested) > 0)
+		|| (stream->jpeg_sink != NULL && atomic_load(&stream->jpeg_sink->has_clients))
 	);
 }
 
-static us_workers_pool_s *_stream_init_loop(us_stream_s *stream) {
+static bool _stream_has_any_clients_cached(us_stream_s *stream) {
+	const us_stream_runtime_s *const run = stream->run;
+	return (
+		_stream_has_jpeg_clients_cached(stream)
+		|| (run->h264 != NULL && atomic_load(&run->h264->sink->has_clients))
+		|| (stream->raw_sink != NULL && atomic_load(&stream->raw_sink->has_clients))
+	);
+}
 
-	us_workers_pool_s *pool = NULL;
-	int access_error = 0;
+static int _stream_init_loop(us_stream_s *stream) {
+	us_stream_runtime_s *const run = stream->run;
 
-	US_LOG_DEBUG("%s: stream->run->stop=%d", __FUNCTION__, atomic_load(&_RUN(stop)));
+	bool waiting_reported = false;
+	while (!atomic_load(&stream->run->stop)) {
+#		ifdef WITH_GPIO
+		us_gpio_set_stream_online(false);
+#		endif
 
-	while (!atomic_load(&_RUN(stop))) {
-		_stream_expose_frame(stream, NULL, 0);
+		// Флаги has_clients у синков не обновляются сами по себе, поэтому обновим их
+		// на каждой итерации старта стрима. После старта этим будут заниматься воркеры.
+		if (stream->jpeg_sink != NULL) {
+			us_memsink_server_check(stream->jpeg_sink, NULL);
+		}
+		if (stream->run->h264 != NULL) {
+			us_memsink_server_check(stream->run->h264->sink, NULL);
+		}
+		if (stream->raw_sink != NULL) {
+			us_memsink_server_check(stream->raw_sink, NULL);
+		}
 
-		if (access(stream->dev->path, R_OK|W_OK) < 0) {
-			if (access_error != errno) {
-				US_SEP_INFO('=');
-				US_LOG_PERROR("Can't access device");
-				US_LOG_INFO("Waiting for the device access ...");
-				access_error = errno;
+		_stream_check_suicide(stream);
+
+		stream->dev->dma_export = (
+			stream->enc->type == US_ENCODER_TYPE_M2M_VIDEO
+			|| stream->enc->type == US_ENCODER_TYPE_M2M_IMAGE
+			|| run->h264 != NULL
+		);
+		switch (us_device_open(stream->dev)) {
+			case -2:
+				if (!waiting_reported) {
+					waiting_reported = true;
+					US_LOG_INFO("Waiting for the capture device ...");
+				}
+				goto offline_and_retry;
+			case -1:
+				waiting_reported = false;
+				goto offline_and_retry;
+			default: break;
+		}
+		us_encoder_open(stream->enc, stream->dev);
+		return 0;
+
+	offline_and_retry:
+		for (uint count = 0; count < stream->error_delay * 10; ++count) {
+			if (atomic_load(&run->stop)) {
+				break;
 			}
-			sleep(stream->error_delay);
-			continue;
-		} else {
-			US_SEP_INFO('=');
-			access_error = 0;
-		}
+			if (count % 10 == 0) {
+				// Каждую секунду повторяем blank
+				uint width = stream->dev->run->width;
+				uint height = stream->dev->run->height;
+				if (width == 0 || height == 0) {
+					width = stream->dev->width;
+					height = stream->dev->height;
+				}
+				us_blank_draw(run->blank, "< NO SIGNAL >", width, height);
 
-		if ((pool = _stream_init_one(stream)) == NULL) {
-			US_LOG_INFO("Sleeping %u seconds before new stream init ...", stream->error_delay);
-			sleep(stream->error_delay);
-		} else {
-			break;
-		}
-	}
-	return pool;
-}
+				_stream_set_capture_state(stream, width, height, false, 0);
 
-static us_workers_pool_s *_stream_init_one(us_stream_s *stream) {
-	if (us_device_open(stream->dev) < 0) {
-		goto error;
-	}
-	if (
-		stream->enc->type == US_ENCODER_TYPE_M2M_VIDEO
-		|| stream->enc->type == US_ENCODER_TYPE_M2M_IMAGE
-		|| (_RUN(h264) && !us_is_jpeg(stream->dev->run->format))
-	) {
-		us_device_export_to_dma(stream->dev);
-	}
-	if (us_device_switch_capturing(stream->dev, true) < 0) {
-		goto error;
-	}
-	return us_encoder_workers_pool_init(stream->enc, stream->dev);
-	error:
-		us_device_close(stream->dev);
-		return NULL;
-}
-
-static void _stream_expose_frame(us_stream_s *stream, us_frame_s *frame, unsigned captured_fps) {
-#	define VID(x_next) _RUN(video->x_next)
-
-	us_frame_s *new = NULL;
-
-	US_MUTEX_LOCK(VID(mutex));
-
-	if (frame != NULL) {
-		new = frame;
-		_RUN(last_as_blank_ts) = 0; // Останавливаем таймер
-		US_LOG_DEBUG("Exposed ALIVE video frame");
-
-	} else {
-		if (VID(frame->used == 0)) {
-			new = stream->blank; // Инициализация
-			_RUN(last_as_blank_ts) = 0;
-
-		} else if (VID(frame->online)) { // Если переходим из online в offline
-			if (stream->last_as_blank < 0) { // Если last_as_blank выключен, просто покажем старую картинку
-				new = stream->blank;
-				US_LOG_INFO("Changed video frame to BLANK");
-			} else if (stream->last_as_blank > 0) { // // Если нужен таймер - запустим
-				_RUN(last_as_blank_ts) = us_get_now_monotonic() + stream->last_as_blank;
-				US_LOG_INFO("Freezed last ALIVE video frame for %d seconds", stream->last_as_blank);
-			} else {  // last_as_blank == 0 - показываем последний фрейм вечно
-				US_LOG_INFO("Freezed last ALIVE video frame forever");
+				_stream_expose_jpeg(stream, run->blank->jpeg);
+				if (run->h264 != NULL) {
+					us_h264_stream_process(run->h264, run->blank->raw, true);
+				}
+				_stream_expose_raw(stream, run->blank->raw);
 			}
-
-		} else if (stream->last_as_blank < 0) {
-			new = stream->blank;
-			// US_LOG_INFO("Changed video frame to BLANK");
-		}
-
-		if ( // Если уже оффлайн, включена фича last_as_blank с таймером и он запущен
-			stream->last_as_blank > 0
-			&& _RUN(last_as_blank_ts) != 0
-			&& _RUN(last_as_blank_ts) < us_get_now_monotonic()
-		) {
-			new = stream->blank;
-			_RUN(last_as_blank_ts) = 0; // // Останавливаем таймер
-			US_LOG_INFO("Changed last ALIVE video frame to BLANK");
+			usleep(100 * 1000);
 		}
 	}
-
-	if (new != NULL) {
-		us_frame_copy(new, VID(frame));
-	}
-	VID(frame->online) = (frame != NULL);
-	VID(captured_fps) = captured_fps;
-	atomic_store(&VID(updated), true);
-
-	US_MUTEX_UNLOCK(VID(mutex));
-
-	new = (frame ? frame : stream->blank);
-	_SINK_PUT(sink, new);
-
-	if (frame == NULL) {
-		_SINK_PUT(raw_sink, stream->blank);
-		_H264_PUT(stream->blank, false);
-	}
-
-#	undef VID
+	return -1;
+}
+
+static void _stream_expose_jpeg(us_stream_s *stream, const us_frame_s *frame) {
+	us_stream_runtime_s *const run = stream->run;
+	int ri;
+	while ((ri = us_ring_producer_acquire(run->http_jpeg_ring, 0)) < 0) {
+		if (atomic_load(&run->stop)) {
+			return;
+		}
+	}
+	us_frame_s *const dest = run->http_jpeg_ring->items[ri];
+	us_frame_copy(frame, dest);
+	us_ring_producer_release(run->http_jpeg_ring, ri);
+	if (stream->jpeg_sink != NULL) {
+		us_memsink_server_put(stream->jpeg_sink, dest, NULL);
+	}
+}
+
+static void _stream_expose_raw(us_stream_s *stream, const us_frame_s *frame) {
+	if (stream->raw_sink != NULL) {
+		us_memsink_server_put(stream->raw_sink, frame, NULL);
+	}
+}
+
+static void _stream_check_suicide(us_stream_s *stream) {
+	if (stream->exit_on_no_clients == 0) {
+		return;
+	}
+	us_stream_runtime_s *const run = stream->run;
+	const ldf now_ts = us_get_now_monotonic();
+	const ull http_last_request_ts = atomic_load(&run->http_last_request_ts); // Seconds
+	if (_stream_has_any_clients_cached(stream)) {
+		atomic_store(&run->http_last_request_ts, now_ts);
+	} else if (http_last_request_ts + stream->exit_on_no_clients < now_ts) {
+		US_LOG_INFO("No requests or HTTP/sink clients found in last %u seconds, exiting ...",
+			stream->exit_on_no_clients);
+		us_process_suicide();
+		atomic_store(&run->http_last_request_ts, now_ts);
+	}
 }