Bump version: 6.43 → 6.44

An alternative implementation of pikvm/ustreamer#304.
Thanks for the idea.

.bumpversion.cfg

@@ -1,7 +1,7 @@
 [bumpversion]
 commit = True
 tag = True
-current_version = 6.20
+current_version = 6.44
 parse = (?P<major>\d+)\.(?P<minor>\d+)
 serialize = 
 	{major}.{minor}

Makefile

@@ -1,43 +1,64 @@
 -include config.mk
 
+
+# =====
 DESTDIR ?=
 PREFIX ?= /usr/local
 MANPREFIX ?= $(PREFIX)/share/man
 
 CC ?= gcc
 PY ?= python3
+PKG_CONFIG ?= pkg-config
 CFLAGS ?= -O3
 LDFLAGS ?=
 
 R_DESTDIR = $(if $(DESTDIR),$(shell realpath "$(DESTDIR)"),)
 
+WITH_PYTHON ?= 0
+WITH_JANUS ?= 0
+WITH_V4P ?= 0
+WITH_GPIO ?= 0
+WITH_SYSTEMD ?= 0
+WITH_PTHREAD_NP ?= 1
+WITH_SETPROCTITLE ?= 1
+WITH_PDEATHSIG ?= 1
+
+define optbool
+$(filter $(shell echo $(1) | tr A-Z a-z), yes on 1)
+endef
+MK_WITH_PYTHON = $(call optbool,$(WITH_PYTHON))
+MK_WITH_JANUS = $(call optbool,$(WITH_JANUS))
+MK_WITH_V4P = $(call optbool,$(WITH_V4P))
+MK_WITH_GPIO = $(call optbool,$(WITH_GPIO))
+MK_WITH_SYSTEMD = $(call optbool,$(WITH_SYSTEMD))
+MK_WITH_PTHREAD_NP = $(call optbool,$(WITH_PTHREAD_NP))
+MK_WITH_SETPROCTITLE = $(call optbool,$(WITH_SETPROCTITLE))
+MK_WITH_PDEATHSIG = $(call optbool,$(WITH_PDEATHSIG))
+
 export
 
 _LINTERS_IMAGE ?= ustreamer-linters
 
 
 # =====
-ifeq (__not_found__,$(shell which pkg-config 2>/dev/null || echo "__not_found__"))
-$(error "No pkg-config found in $(PATH)")
+ifeq (__not_found__,$(shell which $(PKG_CONFIG) 2>/dev/null || echo "__not_found__"))
+$(error "No $(PKG_CONFIG) found in $(PATH)")
 endif
 
 
 # =====
-define optbool
-$(filter $(shell echo $(1) | tr A-Z a-z), yes on 1)
-endef
-
 ifeq ($(V),)
 	ECHO = @
 endif
 
+
 # =====
 all:
 	+ $(MAKE) apps
-ifneq ($(call optbool,$(WITH_PYTHON)),)
+ifneq ($(MK_WITH_PYTHON),)
 	+ $(MAKE) python
 endif
-ifneq ($(call optbool,$(WITH_JANUS)),)
+ifneq ($(MK_WITH_JANUS),)
 	+ $(MAKE) janus
 endif
 
@@ -61,10 +82,10 @@ janus:
 
 install: all
 	$(MAKE) -C src install
-ifneq ($(call optbool,$(WITH_PYTHON)),)
+ifneq ($(MK_WITH_PYTHON),)
 	$(MAKE) -C python install
 endif
-ifneq ($(call optbool,$(WITH_JANUS)),)
+ifneq ($(MK_WITH_JANUS),)
 	$(MAKE) -C janus install
 endif
 	mkdir -p $(R_DESTDIR)$(MANPREFIX)/man1

README.md

@@ -11,7 +11,7 @@
 |----------|---------------|-------------------|
 | Multithreaded JPEG encoding | ✔ | ✘ |
 | Hardware image encoding<br>on Raspberry Pi | ✔ | ✘ |
-| Behavior when the device<br>is disconnected while streaming | ✔ Shows a black screen<br>with ```NO SIGNAL``` on it<br>until reconnected | ✘ Stops the streaming <sup>1</sup> |
+| Behavior when the device<br>is disconnected while streaming | ✔ Shows a black screen<br>with ```NO LIVE VIDEO``` on it<br>until reconnected | ✘ Stops the streaming <sup>1</sup> |
 | [DV-timings](https://linuxtv.org/downloads/v4l-dvb-apis-new/userspace-api/v4l/dv-timings.html) support -<br>the ability to change resolution<br>on the fly by source signal | ✔ | ☹ Partially yes <sup>1</sup> |
 | Option to skip frames when streaming<br>static images by HTTP to save the traffic | ✔ <sup>2</sup> | ✘ |
 | Streaming via UNIX domain socket | ✔ | ✘ |
@@ -44,7 +44,7 @@ You need to download the µStreamer onto your system and build it from the sourc
 * FreeBSD port: https://www.freshports.org/multimedia/ustreamer.
 
 ### Preconditions
-You'll need  ```make```, ```gcc```, ```libevent``` with ```pthreads``` support, ```libjpeg9```/```libjpeg-turbo``` and ```libbsd``` (only for Linux).
+You'll need  ```make```, ```gcc```, ```pkg-config```, ```libevent``` with ```pthreads``` support, ```libjpeg9```/```libjpeg-turbo``` and ```libbsd``` (only for Linux).
 
 * Arch: `sudo pacman -S libevent libjpeg-turbo libutil-linux libbsd`.
 * Raspberry OS Bullseye: `sudo apt install libevent-dev libjpeg62-turbo libbsd-dev`. Add `libgpiod-dev` for `WITH_GPIO=1` and `libsystemd-dev` for `WITH_SYSTEMD=1` and `libasound2-dev libspeex-dev libspeexdsp-dev libopus-dev` for `WITH_JANUS=1`.

janus/Makefile

@@ -2,6 +2,7 @@ R_DESTDIR ?=
 PREFIX ?= /usr/local
 
 CC ?= gcc
+PKG_CONFIG ?= pkg-config
 CFLAGS ?= -O3
 LDFLAGS ?=
 
@@ -9,21 +10,20 @@ LDFLAGS ?=
 # =====
 _PLUGIN = libjanus_ustreamer.so
 
-_CFLAGS = -fPIC -MD -c -std=c17 -Wall -Wextra -D_GNU_SOURCE $(shell pkg-config --cflags glib-2.0) $(CFLAGS)
-_LDFLAGS = -shared -lm -pthread -lrt -ljansson -lopus -lasound -lspeexdsp $(shell pkg-config --libs glib-2.0) $(LDFLAGS)
+_CFLAGS = -fPIC -MD -c -std=c17 -Wall -Wextra -D_GNU_SOURCE $(shell $(PKG_CONFIG) --cflags janus-gateway) $(CFLAGS)
+_LDFLAGS = -shared -lm -pthread -lrt -ljansson -lopus -lasound -lspeexdsp $(shell $(PKG_CONFIG) --libs janus-gateway) $(LDFLAGS)
 
 _SRCS = $(shell ls src/uslibs/*.c src/*.c)
 
 _BUILD = build
 
 
-define optbool
-$(filter $(shell echo $(1) | tr A-Z a-z), yes on 1)
-endef
+# =====
+ifneq ($(shell sh -c 'uname 2>/dev/null || echo Unknown'),FreeBSD)
+override _LDFLAGS += -latomic
+endif
 
-
-WITH_PTHREAD_NP ?= 1
-ifneq ($(call optbool,$(WITH_PTHREAD_NP)),)
+ifneq ($(MK_WITH_PTHREAD_NP),)
 override _CFLAGS += -DWITH_PTHREAD_NP
 endif
 

janus/src/acap.c

@@ -0,0 +1,243 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2024  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 "acap.h"
+
+#include <stdlib.h>
+#include <stdatomic.h>
+#include <assert.h>
+
+#include <pthread.h>
+#include <alsa/asoundlib.h>
+#include <speex/speex_resampler.h>
+#include <opus/opus.h>
+
+#include "uslibs/types.h"
+#include "uslibs/errors.h"
+#include "uslibs/tools.h"
+#include "uslibs/array.h"
+#include "uslibs/ring.h"
+#include "uslibs/threading.h"
+
+#include "rtp.h"
+#include "au.h"
+#include "logging.h"
+
+
+static void *_pcm_thread(void *v_acap);
+static void *_encoder_thread(void *v_acap);
+
+
+us_acap_s *us_acap_init(const char *name, uint pcm_hz) {
+	us_acap_s *acap;
+	US_CALLOC(acap, 1);
+	acap->pcm_hz = pcm_hz;
+	US_RING_INIT_WITH_ITEMS(acap->pcm_ring, 8, us_au_pcm_init);
+	US_RING_INIT_WITH_ITEMS(acap->enc_ring, 8, us_au_encoded_init);
+	atomic_init(&acap->stop, false);
+
+	int err;
+
+	{
+		if ((err = snd_pcm_open(&acap->dev, name, SND_PCM_STREAM_CAPTURE, 0)) < 0) {
+			acap->dev = NULL;
+			US_JLOG_PERROR_ALSA(err, "acap", "Can't open PCM capture");
+			goto error;
+		}
+		assert(!snd_pcm_hw_params_malloc(&acap->dev_params));
+
+#		define SET_PARAM(_msg, _func, ...) { \
+				if ((err = _func(acap->dev, acap->dev_params, ##__VA_ARGS__)) < 0) { \
+					US_JLOG_PERROR_ALSA(err, "acap", _msg); \
+					goto error; \
+				} \
+			}
+
+		SET_PARAM("Can't initialize PCM params",	snd_pcm_hw_params_any);
+		SET_PARAM("Can't set PCM access type",		snd_pcm_hw_params_set_access, SND_PCM_ACCESS_RW_INTERLEAVED);
+		SET_PARAM("Can't set PCM channels number",	snd_pcm_hw_params_set_channels, US_RTP_OPUS_CH);
+		SET_PARAM("Can't set PCM sampling format",	snd_pcm_hw_params_set_format, SND_PCM_FORMAT_S16_LE);
+		SET_PARAM("Can't set PCM sampling rate",	snd_pcm_hw_params_set_rate_near, &acap->pcm_hz, 0);
+		if (acap->pcm_hz < US_AU_MIN_PCM_HZ || acap->pcm_hz > US_AU_MAX_PCM_HZ) {
+			US_JLOG_ERROR("acap", "Unsupported PCM freq: %u; should be: %u <= F <= %u",
+				acap->pcm_hz, US_AU_MIN_PCM_HZ, US_AU_MAX_PCM_HZ);
+			goto error;
+		}
+		acap->pcm_frames = US_AU_HZ_TO_FRAMES(acap->pcm_hz);
+		acap->pcm_size = US_AU_HZ_TO_BUF8(acap->pcm_hz);
+		SET_PARAM("Can't apply PCM params", snd_pcm_hw_params);
+
+#		undef SET_PARAM
+	}
+
+	if (acap->pcm_hz != US_RTP_OPUS_HZ) {
+		acap->res = speex_resampler_init(US_RTP_OPUS_CH, acap->pcm_hz, US_RTP_OPUS_HZ, SPEEX_RESAMPLER_QUALITY_DESKTOP, &err);
+		if (err < 0) {
+			acap->res = NULL;
+			US_JLOG_PERROR_RES(err, "acap", "Can't create resampler");
+			goto error;
+		}
+	}
+
+	{
+		// OPUS_APPLICATION_VOIP, OPUS_APPLICATION_RESTRICTED_LOWDELAY
+		acap->enc = opus_encoder_create(US_RTP_OPUS_HZ, US_RTP_OPUS_CH, OPUS_APPLICATION_AUDIO, &err);
+		assert(err == 0);
+		// https://github.com/meetecho/janus-gateway/blob/3cdd6ff/src/plugins/janus_audiobridge.c#L2272
+		// https://datatracker.ietf.org/doc/html/rfc7587#section-3.1.1
+		assert(!opus_encoder_ctl(acap->enc, OPUS_SET_BITRATE(128000)));
+		assert(!opus_encoder_ctl(acap->enc, OPUS_SET_MAX_BANDWIDTH(OPUS_BANDWIDTH_FULLBAND)));
+		assert(!opus_encoder_ctl(acap->enc, OPUS_SET_SIGNAL(OPUS_SIGNAL_MUSIC)));
+		// OPUS_SET_INBAND_FEC(1), OPUS_SET_PACKET_LOSS_PERC(10): see rtpa.c
+	}
+
+	US_JLOG_INFO("acap", "Capture configured on %uHz; capturing ...", acap->pcm_hz);
+	acap->tids_created = true;
+	US_THREAD_CREATE(acap->enc_tid, _encoder_thread, acap);
+	US_THREAD_CREATE(acap->pcm_tid, _pcm_thread, acap);
+
+	return acap;
+
+	error:
+		us_acap_destroy(acap);
+		return NULL;
+}
+
+void us_acap_destroy(us_acap_s *acap) {
+	if (acap->tids_created) {
+		atomic_store(&acap->stop, true);
+		US_THREAD_JOIN(acap->pcm_tid);
+		US_THREAD_JOIN(acap->enc_tid);
+	}
+	US_DELETE(acap->enc, opus_encoder_destroy);
+	US_DELETE(acap->res, speex_resampler_destroy);
+	US_DELETE(acap->dev, snd_pcm_close);
+	US_DELETE(acap->dev_params, snd_pcm_hw_params_free);
+	US_RING_DELETE_WITH_ITEMS(acap->enc_ring, us_au_encoded_destroy);
+	US_RING_DELETE_WITH_ITEMS(acap->pcm_ring, us_au_pcm_destroy);
+	if (acap->tids_created) {
+		US_JLOG_INFO("acap", "Capture closed");
+	}
+	free(acap);
+}
+
+int us_acap_get_encoded(us_acap_s *acap, u8 *data, uz *size, u64 *pts) {
+	if (atomic_load(&acap->stop)) {
+		return -1;
+	}
+	const int ri = us_ring_consumer_acquire(acap->enc_ring, 0.1);
+	if (ri < 0) {
+		return US_ERROR_NO_DATA;
+	}
+	const us_au_encoded_s *const buf = acap->enc_ring->items[ri];
+	if (buf->used == 0 || *size < buf->used) {
+		us_ring_consumer_release(acap->enc_ring, ri);
+		return US_ERROR_NO_DATA;
+	}
+	memcpy(data, buf->data, buf->used);
+	*size = buf->used;
+	*pts = buf->pts;
+	us_ring_consumer_release(acap->enc_ring, ri);
+	return 0;
+}
+
+static void *_pcm_thread(void *v_acap) {
+	US_THREAD_SETTLE("us_ac_pcm");
+
+	us_acap_s *const acap = v_acap;
+	u8 in[US_AU_MAX_BUF8];
+
+	while (!atomic_load(&acap->stop)) {
+		const int frames = snd_pcm_readi(acap->dev, in, acap->pcm_frames);
+		if (frames < 0) {
+			US_JLOG_PERROR_ALSA(frames, "acap", "Fatal: Can't capture PCM frames");
+			break;
+		} else if (frames < (int)acap->pcm_frames) {
+			US_JLOG_ERROR("acap", "Fatal: Too few PCM frames captured");
+			break;
+		}
+
+		const int ri = us_ring_producer_acquire(acap->pcm_ring, 0);
+		if (ri >= 0) {
+			us_au_pcm_s *const out = acap->pcm_ring->items[ri];
+			memcpy(out->data, in, acap->pcm_size);
+			us_ring_producer_release(acap->pcm_ring, ri);
+		} else {
+			US_JLOG_ERROR("acap", "PCM ring is full");
+		}
+	}
+
+	atomic_store(&acap->stop, true);
+	return NULL;
+}
+
+static void *_encoder_thread(void *v_acap) {
+	US_THREAD_SETTLE("us_ac_enc");
+
+	us_acap_s *const acap = v_acap;
+	s16 in_res[US_AU_MAX_BUF16];
+
+	while (!atomic_load(&acap->stop)) {
+		const int in_ri = us_ring_consumer_acquire(acap->pcm_ring, 0.1);
+		if (in_ri < 0) {
+			continue;
+		}
+		us_au_pcm_s *const in = acap->pcm_ring->items[in_ri];
+
+		s16 *in_ptr;
+		if (acap->res != NULL) {
+			assert(acap->pcm_hz != US_RTP_OPUS_HZ);
+			u32 in_count = acap->pcm_frames;
+			u32 out_count = US_AU_HZ_TO_FRAMES(US_RTP_OPUS_HZ);
+			speex_resampler_process_interleaved_int(acap->res, in->data, &in_count, in_res, &out_count);
+			in_ptr = in_res;
+		} else {
+			assert(acap->pcm_hz == US_RTP_OPUS_HZ);
+			in_ptr = in->data;
+		}
+
+		const int out_ri = us_ring_producer_acquire(acap->enc_ring, 0);
+		if (out_ri < 0) {
+			US_JLOG_ERROR("acap", "OPUS encoder queue is full");
+			us_ring_consumer_release(acap->pcm_ring, in_ri);
+			continue;
+		}
+		us_au_encoded_s *const out = acap->enc_ring->items[out_ri];
+
+		const int size = opus_encode(acap->enc, in_ptr, US_AU_HZ_TO_FRAMES(US_RTP_OPUS_HZ), out->data, US_ARRAY_LEN(out->data));
+		us_ring_consumer_release(acap->pcm_ring, in_ri);
+
+		if (size > 0) {
+			out->used = size;
+			out->pts = acap->pts;
+			// https://datatracker.ietf.org/doc/html/rfc7587#section-4.2
+			acap->pts += US_AU_HZ_TO_FRAMES(US_RTP_OPUS_HZ);
+		} else {
+			out->used = 0;
+			US_JLOG_PERROR_OPUS(size, "acap", "Fatal: Can't encode PCM frame to OPUS");
+		}
+		us_ring_producer_release(acap->enc_ring, out_ri);
+	}
+
+	atomic_store(&acap->stop, true);
+	return NULL;
+}

janus/src/acap.h

@@ -34,11 +34,11 @@
 
 
 typedef struct {
-	snd_pcm_t			*pcm;
+	snd_pcm_t			*dev;
 	uint				pcm_hz;
 	uint				pcm_frames;
 	uz					pcm_size;
-	snd_pcm_hw_params_t	*pcm_params;
+	snd_pcm_hw_params_t	*dev_params;
 	SpeexResamplerState	*res;
 	OpusEncoder			*enc;
 
@@ -50,12 +50,10 @@ typedef struct {
 	pthread_t		enc_tid;
 	bool			tids_created;
 	atomic_bool		stop;
-} us_audio_s;
+} us_acap_s;
 
 
-bool us_audio_probe(const char *name);
+us_acap_s *us_acap_init(const char *name, uint pcm_hz);
+void us_acap_destroy(us_acap_s *acap);
 
-us_audio_s *us_audio_init(const char *name, uint pcm_hz);
-void us_audio_destroy(us_audio_s *audio);
-
-int us_audio_get_encoded(us_audio_s *audio, u8 *data, uz *size, u64 *pts);
+int us_acap_get_encoded(us_acap_s *acap, u8 *data, uz *size, u64 *pts);

janus/src/au.c

@@ -0,0 +1,148 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2024  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 "au.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+
+#include <sys/stat.h>
+
+#include "uslibs/tools.h"
+
+
+bool us_au_probe(const char *name) {
+	// This function is very limited. It takes something like:
+	//   hw:0,0 or hw:tc358743,0 or plughw:UAC2Gadget,0
+	// parses card name (0, tc358743, UAC2Gadget) and checks
+	// the existence of it in /proc/asound/.
+	// It's enough for our case.
+
+	if (name == NULL) {
+		return false;
+	}
+
+	if (strchr(name, '/') || strchr(name, '.')) {
+		return false;
+	}
+
+	const char *begin = strchr(name, ':');
+	if (begin == NULL) {
+		return false;
+	}
+	begin += 1;
+	if (*begin == '\0') {
+		return false;
+	}
+
+	const char *end = strchr(begin, ',');
+	if (end == NULL) {
+		return false;
+	}
+	if (end - begin < 1) {
+		return false;
+	}
+
+	char *card = us_strdup(begin);
+	card[end - begin] = '\0';
+
+	bool numeric = true;
+	for (uz index = 0; card[index] != '\0'; ++index) {
+		if (!isdigit(card[index])) {
+			numeric = false;
+			break;
+		}
+	}
+
+	char *path;
+	if (numeric) {
+		US_ASPRINTF(path, "/proc/asound/card%s", card);
+	} else {
+		US_ASPRINTF(path, "/proc/asound/%s", card);
+	}
+
+	bool ok = false;
+	struct stat st;
+	if (lstat(path, &st) == 0) {
+		if (numeric && S_ISDIR(st.st_mode)) {
+			ok = true;
+		} else if (!numeric && S_ISLNK(st.st_mode)) {
+			ok = true;
+		}
+	}
+	free(path);
+	free(card);
+	return ok;
+}
+
+us_au_pcm_s *us_au_pcm_init(void) {
+	us_au_pcm_s *pcm;
+	US_CALLOC(pcm, 1);
+	return pcm;
+}
+
+void us_au_pcm_destroy(us_au_pcm_s *pcm) {
+	free(pcm);
+}
+
+void us_au_pcm_mix(us_au_pcm_s *dest, us_au_pcm_s *src) {
+	const uz size = src->frames * US_RTP_OPUS_CH * 2; // 2 for 16 bit
+	if (src->frames == 0) {
+		return;
+	} else if (dest->frames == 0) {
+		memcpy(dest->data, src->data, size);
+		dest->frames = src->frames;
+	} else if (dest->frames == src->frames) {
+		// https://stackoverflow.com/questions/12089662
+		for (uz index = 0; index < size; ++index) {
+			int a = dest->data[index];
+			int b = src->data[index];
+			int m;
+
+			a += 32768;
+			b += 32768;
+
+			if ((a < 32768) && (b < 32768)) {
+				m = a * b / 32768;
+			} else {
+				m = 2 * (a + b) - (a * b) / 32768 - 65536;
+			}
+			if (m == 65536) {
+				m = 65535;
+			}
+			m -= 32768;
+
+			dest->data[index] = m;
+		}
+	}
+}
+
+us_au_encoded_s *us_au_encoded_init(void) {
+	us_au_encoded_s *enc;
+	US_CALLOC(enc, 1);
+	return enc;
+}
+
+void us_au_encoded_destroy(us_au_encoded_s *enc) {
+	free(enc);
+}

janus/src/au.h

@@ -0,0 +1,61 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
+#                                                                            #
+#    Copyright (C) 2018-2024  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 "uslibs/types.h"
+
+#include "rtp.h"
+
+// A number of frames per 1 channel:
+//   - https://github.com/xiph/opus/blob/7b05f44/src/opus_demo.c#L368
+#define US_AU_FRAME_MS			20
+// #define _HZ_TO_FRAMES(_hz)	(6 * (_hz) / 50) // 120ms
+#define US_AU_HZ_TO_FRAMES(_hz)	((_hz) / 50) // 20ms
+#define US_AU_HZ_TO_BUF16(_hz)	(US_AU_HZ_TO_FRAMES(_hz) * US_RTP_OPUS_CH) // ... * 2: One stereo frame = (16bit L) + (16bit R)
+#define US_AU_HZ_TO_BUF8(_hz)	(US_AU_HZ_TO_BUF16(_hz) * sizeof(s16))
+
+#define US_AU_MIN_PCM_HZ		8000
+#define US_AU_MAX_PCM_HZ		192000
+#define US_AU_MAX_BUF16			US_AU_HZ_TO_BUF16(US_AU_MAX_PCM_HZ)
+#define US_AU_MAX_BUF8			US_AU_HZ_TO_BUF8(US_AU_MAX_PCM_HZ)
+
+
+typedef struct {
+	s16		data[US_AU_MAX_BUF16];
+	uz		frames;
+} us_au_pcm_s;
+
+typedef struct {
+	u8		data[US_RTP_PAYLOAD_SIZE];
+	uz		used;
+	u64		pts;
+} us_au_encoded_s;
+
+bool us_au_probe(const char *name);
+
+us_au_pcm_s *us_au_pcm_init(void);
+void us_au_pcm_destroy(us_au_pcm_s *pcm);
+void us_au_pcm_mix(us_au_pcm_s *a, us_au_pcm_s *b);
+
+us_au_encoded_s *us_au_encoded_init(void);
+void us_au_encoded_destroy(us_au_encoded_s *enc);

janus/src/audio.c

@@ -1,295 +0,0 @@
-/*****************************************************************************
-#                                                                            #
-#    uStreamer - Lightweight and fast MJPEG-HTTP streamer.                   #
-#                                                                            #
-#    Copyright (C) 2018-2024  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 "audio.h"
-
-#include <stdlib.h>
-#include <stdatomic.h>
-#include <assert.h>
-
-#include <pthread.h>
-#include <alsa/asoundlib.h>
-#include <speex/speex_resampler.h>
-#include <opus/opus.h>
-
-#include "uslibs/types.h"
-#include "uslibs/errors.h"
-#include "uslibs/tools.h"
-#include "uslibs/array.h"
-#include "uslibs/ring.h"
-#include "uslibs/threading.h"
-
-#include "logging.h"
-
-
-#define _JLOG_PERROR_ALSA(_err, _prefix, _msg, ...)	US_JLOG_ERROR(_prefix, _msg ": %s", ##__VA_ARGS__, snd_strerror(_err))
-#define _JLOG_PERROR_RES(_err, _prefix, _msg, ...)	US_JLOG_ERROR(_prefix, _msg ": %s", ##__VA_ARGS__, speex_resampler_strerror(_err))
-#define _JLOG_PERROR_OPUS(_err, _prefix, _msg, ...)	US_JLOG_ERROR(_prefix, _msg ": %s", ##__VA_ARGS__, opus_strerror(_err))
-
-// A number of frames per 1 channel:
-//   - https://github.com/xiph/opus/blob/7b05f44/src/opus_demo.c#L368
-// #define _HZ_TO_FRAMES(_hz)	(6 * (_hz) / 50) // 120ms
-#define _HZ_TO_FRAMES(_hz)	((_hz) / 50) // 20ms
-#define _HZ_TO_BUF16(_hz)	(_HZ_TO_FRAMES(_hz) * 2) // One stereo frame = (16bit L) + (16bit R)
-#define _HZ_TO_BUF8(_hz)	(_HZ_TO_BUF16(_hz) * sizeof(s16))
-
-#define _MIN_PCM_HZ			8000
-#define _MAX_PCM_HZ			192000
-#define _MAX_BUF16			_HZ_TO_BUF16(_MAX_PCM_HZ)
-#define _MAX_BUF8			_HZ_TO_BUF8(_MAX_PCM_HZ)
-#define _ENCODER_INPUT_HZ	48000
-
-
-typedef struct {
-	s16		data[_MAX_BUF16];
-} _pcm_buffer_s;
-
-typedef struct {
-	u8		data[_MAX_BUF8]; // Worst case
-	uz		used;
-	u64	pts;
-} _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);
-
-
-bool us_audio_probe(const char *name) {
-	snd_pcm_t *pcm;
-	int err;
-	US_JLOG_INFO("audio", "Probing PCM capture ...");
-	if ((err = snd_pcm_open(&pcm, name, SND_PCM_STREAM_CAPTURE, 0)) < 0) {
-		_JLOG_PERROR_ALSA(err, "audio", "Can't probe PCM capture");
-		return false;
-	}
-	snd_pcm_close(pcm);
-	US_JLOG_INFO("audio", "PCM capture is available");
-	return true;
-}
-
-us_audio_s *us_audio_init(const char *name, uint pcm_hz) {
-	us_audio_s *audio;
-	US_CALLOC(audio, 1);
-	audio->pcm_hz = pcm_hz;
-	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;
-
-	{
-		if ((err = snd_pcm_open(&audio->pcm, name, SND_PCM_STREAM_CAPTURE, 0)) < 0) {
-			audio->pcm = NULL;
-			_JLOG_PERROR_ALSA(err, "audio", "Can't open PCM capture");
-			goto error;
-		}
-		assert(!snd_pcm_hw_params_malloc(&audio->pcm_params));
-
-#		define SET_PARAM(_msg, _func, ...) { \
-				if ((err = _func(audio->pcm, audio->pcm_params, ##__VA_ARGS__)) < 0) { \
-					_JLOG_PERROR_ALSA(err, "audio", _msg); \
-					goto error; \
-				} \
-			}
-
-		SET_PARAM("Can't initialize PCM params",	snd_pcm_hw_params_any);
-		SET_PARAM("Can't set PCM access type",		snd_pcm_hw_params_set_access, SND_PCM_ACCESS_RW_INTERLEAVED);
-		SET_PARAM("Can't set PCM channels numbre",	snd_pcm_hw_params_set_channels, 2);
-		SET_PARAM("Can't set PCM sampling format",	snd_pcm_hw_params_set_format, SND_PCM_FORMAT_S16_LE);
-		SET_PARAM("Can't set PCM sampling rate",	snd_pcm_hw_params_set_rate_near, &audio->pcm_hz, 0);
-		if (audio->pcm_hz < _MIN_PCM_HZ || audio->pcm_hz > _MAX_PCM_HZ) {
-			US_JLOG_ERROR("audio", "Unsupported PCM freq: %u; should be: %u <= F <= %u",
-				audio->pcm_hz, _MIN_PCM_HZ, _MAX_PCM_HZ);
-			goto error;
-		}
-		audio->pcm_frames = _HZ_TO_FRAMES(audio->pcm_hz);
-		audio->pcm_size = _HZ_TO_BUF8(audio->pcm_hz);
-		SET_PARAM("Can't apply PCM params", snd_pcm_hw_params);
-
-#		undef SET_PARAM
-	}
-
-	if (audio->pcm_hz != _ENCODER_INPUT_HZ) {
-		audio->res = speex_resampler_init(2, audio->pcm_hz, _ENCODER_INPUT_HZ, SPEEX_RESAMPLER_QUALITY_DESKTOP, &err);
-		if (err < 0) {
-			audio->res = NULL;
-			_JLOG_PERROR_RES(err, "audio", "Can't create resampler");
-			goto error;
-		}
-	}
-
-	{
-		// OPUS_APPLICATION_VOIP, OPUS_APPLICATION_RESTRICTED_LOWDELAY
-		audio->enc = opus_encoder_create(_ENCODER_INPUT_HZ, 2, OPUS_APPLICATION_AUDIO, &err);
-		assert(err == 0);
-		assert(!opus_encoder_ctl(audio->enc, OPUS_SET_BITRATE(48000)));
-		assert(!opus_encoder_ctl(audio->enc, OPUS_SET_MAX_BANDWIDTH(OPUS_BANDWIDTH_FULLBAND)));
-		assert(!opus_encoder_ctl(audio->enc, OPUS_SET_SIGNAL(OPUS_SIGNAL_MUSIC)));
-		// OPUS_SET_INBAND_FEC(1), OPUS_SET_PACKET_LOSS_PERC(10): see rtpa.c
-	}
-
-	US_JLOG_INFO("audio", "Pipeline configured on %uHz; capturing ...", audio->pcm_hz);
-	audio->tids_created = true;
-	US_THREAD_CREATE(audio->enc_tid, _encoder_thread, audio);
-	US_THREAD_CREATE(audio->pcm_tid, _pcm_thread, audio);
-
-	return audio;
-
-	error:
-		us_audio_destroy(audio);
-		return NULL;
-}
-
-void us_audio_destroy(us_audio_s *audio) {
-	if (audio->tids_created) {
-		atomic_store(&audio->stop, true);
-		US_THREAD_JOIN(audio->pcm_tid);
-		US_THREAD_JOIN(audio->enc_tid);
-	}
-	US_DELETE(audio->enc, opus_encoder_destroy);
-	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_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");
-	}
-	free(audio);
-}
-
-int us_audio_get_encoded(us_audio_s *audio, u8 *data, uz *size, u64 *pts) {
-	if (atomic_load(&audio->stop)) {
-		return -1;
-	}
-	const int ri = us_ring_consumer_acquire(audio->enc_ring, 0.1);
-	if (ri < 0) {
-		return US_ERROR_NO_DATA;
-	}
-	const _enc_buffer_s *const buf = audio->enc_ring->items[ri];
-	if (*size < buf->used) {
-		us_ring_consumer_release(audio->enc_ring, ri);
-		return US_ERROR_NO_DATA;
-	}
-	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_SETTLE("us_a_pcm");
-
-	us_audio_s *const audio = v_audio;
-	u8 in[_MAX_BUF8];
-
-	while (!atomic_load(&audio->stop)) {
-		const int frames = snd_pcm_readi(audio->pcm, in, audio->pcm_frames);
-		if (frames < 0) {
-			_JLOG_PERROR_ALSA(frames, "audio", "Fatal: Can't capture PCM frames");
-			break;
-		} else if (frames < (int)audio->pcm_frames) {
-			US_JLOG_ERROR("audio", "Fatal: Too few PCM frames captured");
-			break;
-		}
-
-		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);
-			us_ring_producer_release(audio->pcm_ring, ri);
-		} else {
-			US_JLOG_ERROR("audio", "PCM ring is full");
-		}
-	}
-
-	atomic_store(&audio->stop, true);
-	return NULL;
-}
-
-static void *_encoder_thread(void *v_audio) {
-	US_THREAD_SETTLE("us_a_enc");
-
-	us_audio_s *const audio = v_audio;
-	s16 in_res[_MAX_BUF16];
-
-	while (!atomic_load(&audio->stop)) {
-		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];
-
-		s16 *in_ptr;
-		if (audio->res != NULL) {
-			assert(audio->pcm_hz != _ENCODER_INPUT_HZ);
-			u32 in_count = audio->pcm_frames;
-			u32 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);
-		} 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);
-	return NULL;
-}

janus/src/client.c

@@ -25,23 +25,29 @@
 #include <stdlib.h>
 #include <stdatomic.h>
 #include <string.h>
+#include <assert.h>
 
 #include <pthread.h>
 #include <janus/plugins/plugin.h>
+#include <janus/rtp.h>
+#include <opus/opus.h>
 
 #include "uslibs/types.h"
 #include "uslibs/tools.h"
 #include "uslibs/threading.h"
+#include "uslibs/array.h"
 #include "uslibs/list.h"
 #include "uslibs/ring.h"
 
 #include "logging.h"
+#include "au.h"
 #include "rtp.h"
 
 
 static void *_video_thread(void *v_client);
-static void *_audio_thread(void *v_client);
-static void *_common_thread(void *v_client, bool video);
+static void *_acap_thread(void *v_client);
+static void *_video_or_acap_thread(void *v_client, bool video);
+static void *_aplay_thread(void *v_client);
 
 
 us_janus_client_s *us_janus_client_init(janus_callbacks *gw, janus_plugin_session *session) {
@@ -50,7 +56,8 @@ us_janus_client_s *us_janus_client_init(janus_callbacks *gw, janus_plugin_sessio
 	client->gw = gw;
 	client->session = session;
 	atomic_init(&client->transmit, false);
-	atomic_init(&client->transmit_audio, false);
+	atomic_init(&client->transmit_acap, false);
+	atomic_init(&client->transmit_aplay, false);
 	atomic_init(&client->video_orient, 0);
 
 	atomic_init(&client->stop, false);
@@ -58,8 +65,12 @@ us_janus_client_s *us_janus_client_init(janus_callbacks *gw, janus_plugin_sessio
 	US_RING_INIT_WITH_ITEMS(client->video_ring, 2048, us_rtp_init);
 	US_THREAD_CREATE(client->video_tid, _video_thread, client);
 
-	US_RING_INIT_WITH_ITEMS(client->audio_ring, 64, us_rtp_init);
-	US_THREAD_CREATE(client->audio_tid, _audio_thread, client);
+	US_RING_INIT_WITH_ITEMS(client->acap_ring, 64, us_rtp_init);
+	US_THREAD_CREATE(client->acap_tid, _acap_thread, client);
+
+	US_RING_INIT_WITH_ITEMS(client->aplay_enc_ring, 64, us_au_encoded_init);
+	US_RING_INIT_WITH_ITEMS(client->aplay_pcm_ring, 64, us_au_pcm_init);
+	US_THREAD_CREATE(client->aplay_tid, _aplay_thread, client);
 
 	return client;
 }
@@ -70,8 +81,12 @@ void us_janus_client_destroy(us_janus_client_s *client) {
 	US_THREAD_JOIN(client->video_tid);
 	US_RING_DELETE_WITH_ITEMS(client->video_ring, us_rtp_destroy);
 
-	US_THREAD_JOIN(client->audio_tid);
-	US_RING_DELETE_WITH_ITEMS(client->audio_ring, us_rtp_destroy);
+	US_THREAD_JOIN(client->acap_tid);
+	US_RING_DELETE_WITH_ITEMS(client->acap_ring, us_rtp_destroy);
+
+	US_THREAD_JOIN(client->aplay_tid);
+	US_RING_DELETE_WITH_ITEMS(client->aplay_enc_ring, us_au_encoded_destroy);
+	US_RING_DELETE_WITH_ITEMS(client->aplay_pcm_ring, us_au_pcm_destroy);
 
 	free(client);
 }
@@ -79,13 +94,13 @@ void us_janus_client_destroy(us_janus_client_s *client) {
 void us_janus_client_send(us_janus_client_s *client, const us_rtp_s *rtp) {
 	if (
 		atomic_load(&client->transmit)
-		&& (rtp->video || atomic_load(&client->transmit_audio))
+		&& (rtp->video || atomic_load(&client->transmit_acap))
 	) {
-		us_ring_s *const ring = (rtp->video ? client->video_ring : client->audio_ring);
+		us_ring_s *const ring = (rtp->video ? client->video_ring : client->acap_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"));
+				client->session, (rtp->video ? "video" : "acap"));
 			return;
 		}
 		memcpy(ring->items[ri], rtp, sizeof(us_rtp_s));
@@ -93,20 +108,65 @@ void us_janus_client_send(us_janus_client_s *client, const us_rtp_s *rtp) {
 	}
 }
 
+void us_janus_client_recv(us_janus_client_s *client, janus_plugin_rtp *packet) {
+	if (
+		packet->video
+		|| packet->length < sizeof(janus_rtp_header)
+		|| !atomic_load(&client->transmit)
+		|| !atomic_load(&client->transmit_aplay)
+	) {
+		return;
+	}
+
+	const janus_rtp_header *const header = (janus_rtp_header*)packet->buffer;
+	if (header->type != US_RTP_OPUS_PAYLOAD) {
+		return;
+	}
+
+	const u16 seq = ntohs(header->seq_number);
+	if (
+		seq >= client->aplay_seq_next // In order or missing
+		|| (client->aplay_seq_next - seq) > 50 // In late sequence or sequence wrapped
+	) {
+		client->aplay_seq_next = seq + 1;
+
+		int size = 0;
+		const char *const data = janus_rtp_payload(packet->buffer, packet->length, &size);
+		if (data == NULL || size <= 0) {
+			return;
+		}
+
+		us_ring_s *const ring = client->aplay_enc_ring;
+		const int ri = us_ring_producer_acquire(ring, 0);
+		if (ri < 0) {
+			// US_JLOG_ERROR("client", "Session %p aplay ring is full", client->session);
+			return;
+		}
+		us_au_encoded_s *enc = ring->items[ri];
+		if ((uz)size < US_ARRAY_LEN(enc->data)) {
+			memcpy(enc->data, data, size);
+			enc->used = size;
+		} else {
+			enc->used = 0;
+		}
+		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);
+	US_THREAD_SETTLE("us_cx_vid");
+	return _video_or_acap_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 *_acap_thread(void *v_client) {
+	US_THREAD_SETTLE("us_cx_ac");
+	return _video_or_acap_thread(v_client, false);
 }
 
-static void *_common_thread(void *v_client, bool video) {
+static void *_video_or_acap_thread(void *v_client, bool video) {
 	us_janus_client_s *const client = v_client;
-	us_ring_s *const ring = (video ? client->video_ring : client->audio_ring);
-	assert(ring != NULL); // Audio may be NULL
+	us_ring_s *const ring = (video ? client->video_ring : client->acap_ring);
+	assert(ring != NULL);
 
 	while (!atomic_load(&client->stop)) {
 		const int ri = us_ring_consumer_acquire(ring, 0.1);
@@ -119,7 +179,7 @@ static void *_common_thread(void *v_client, bool video) {
 
 		if (
 			atomic_load(&client->transmit)
-			&& (video || atomic_load(&client->transmit_audio))
+			&& (video || atomic_load(&client->transmit_acap))
 		) {
 			janus_plugin_rtp packet = {
 				.video = rtp.video,
@@ -145,8 +205,15 @@ static void *_common_thread(void *v_client, bool video) {
 			}*/
 
 			if (rtp.video) {
-				const uint video_orient = atomic_load(&client->video_orient);
+				uint video_orient = atomic_load(&client->video_orient);
 				if (video_orient != 0) {
+					// The extension rotates the video clockwise, but want it counterclockwise.
+					// It's more intuitive for people who have seen a protractor at least once in their life.
+					if (video_orient == 90) {
+						video_orient = 270;
+					} else if (video_orient == 270) {
+						video_orient = 90;
+					}
 					packet.extensions.video_rotation = video_orient;
 				}
 			}
@@ -156,3 +223,48 @@ static void *_common_thread(void *v_client, bool video) {
 	}
 	return NULL;
 }
+
+static void *_aplay_thread(void *v_client) {
+	US_THREAD_SETTLE("us_cx_ap");
+
+	us_janus_client_s *const client = v_client;
+
+	int err;
+	OpusDecoder *dec = opus_decoder_create(US_RTP_OPUS_HZ, US_RTP_OPUS_CH, &err);
+	assert(err == 0);
+
+	while (!atomic_load(&client->stop)) {
+		const int in_ri = us_ring_consumer_acquire(client->aplay_enc_ring, 0.1);
+		if (in_ri < 0) {
+			continue;
+		}
+		us_au_encoded_s *in = client->aplay_enc_ring->items[in_ri];
+
+		if (in->used == 0) {
+			us_ring_consumer_release(client->aplay_enc_ring, in_ri);
+			continue;
+		}
+
+		const int out_ri = us_ring_producer_acquire(client->aplay_pcm_ring, 0);
+		if (out_ri < 0) {
+			US_JLOG_ERROR("aplay", "OPUS decoder queue is full");
+			us_ring_consumer_release(client->aplay_enc_ring, in_ri);
+			continue;
+		}
+		us_au_pcm_s *out = client->aplay_pcm_ring->items[out_ri];
+
+		const int frames = opus_decode(dec, in->data, in->used, out->data, US_AU_HZ_TO_FRAMES(US_RTP_OPUS_HZ), 0);
+		us_ring_consumer_release(client->aplay_enc_ring, in_ri);
+
+		if (frames > 0) {
+			out->frames = frames;
+		} else {
+			out->frames = 0;
+			US_JLOG_PERROR_OPUS(frames, "aplay", "Fatal: Can't decode OPUS to PCM frame");
+		}
+		us_ring_producer_release(client->aplay_pcm_ring, out_ri);
+	}
+
+	opus_decoder_destroy(dec);
+	return NULL;
+}

janus/src/client.h

@@ -38,15 +38,21 @@ typedef struct {
 	janus_callbacks			*gw;
 	janus_plugin_session	*session;
 	atomic_bool				transmit;
-	atomic_bool				transmit_audio;
+	atomic_bool				transmit_acap;
+	atomic_bool				transmit_aplay;
 	atomic_uint				video_orient;
 
 	pthread_t				video_tid;
-	pthread_t				audio_tid;
+	pthread_t				acap_tid;
+	pthread_t				aplay_tid;
 	atomic_bool				stop;
 
 	us_ring_s				*video_ring;
-	us_ring_s				*audio_ring;
+	us_ring_s				*acap_ring;
+
+	us_ring_s				*aplay_enc_ring;
+	u16						aplay_seq_next;
+	us_ring_s				*aplay_pcm_ring;
 
     US_LIST_DECLARE;
 } us_janus_client_s;
@@ -56,3 +62,4 @@ us_janus_client_s *us_janus_client_init(janus_callbacks *gw, janus_plugin_sessio
 void us_janus_client_destroy(us_janus_client_s *client);
 
 void us_janus_client_send(us_janus_client_s *client, const us_rtp_s *rtp);
+void us_janus_client_recv(us_janus_client_s *client, janus_plugin_rtp *packet);

janus/src/config.c

@@ -28,6 +28,7 @@
 #include <janus/config.h>
 #include <janus/plugins/plugin.h>
 
+#include "uslibs/types.h"
 #include "uslibs/tools.h"
 
 #include "const.h"
@@ -35,6 +36,7 @@
 
 
 static char *_get_value(janus_config *jcfg, const char *section, const char *option);
+static uint _get_uint(janus_config *jcfg, const char *section, const char *option, uint def);
 // static bool _get_bool(janus_config *jcfg, const char *section, const char *option, bool def);
 
 
@@ -55,18 +57,18 @@ us_config_s *us_config_init(const char *config_dir_path) {
 	}
 	janus_config_print(jcfg);
 
-	if (
-		(config->video_sink_name = _get_value(jcfg, "memsink", "object")) == NULL
-		&& (config->video_sink_name = _get_value(jcfg, "video", "sink")) == NULL
-	) {
-		US_JLOG_ERROR("config", "Missing config value: video.sink (ex. memsink.object)");
+	if ((config->video_sink_name = _get_value(jcfg, "video", "sink")) == NULL) {
+		US_JLOG_ERROR("config", "Missing config value: video.sink");
 		goto error;
 	}
-	if ((config->audio_dev_name = _get_value(jcfg, "audio", "device")) != NULL) {
-		if ((config->tc358743_dev_path = _get_value(jcfg, "audio", "tc358743")) == NULL) {
-			US_JLOG_INFO("config", "Missing config value: audio.tc358743");
+	if ((config->acap_dev_name = _get_value(jcfg, "acap", "device")) != NULL) {
+		config->acap_hz = _get_uint(jcfg, "acap", "sampling_rate", 0);
+		config->tc358743_dev_path = _get_value(jcfg, "acap", "tc358743");
+		if (config->acap_hz == 0 && config->tc358743_dev_path == NULL) {
+			US_JLOG_ERROR("config", "Either acap.sampling_rate or acap.tc358743 required");
 			goto error;
 		}
+		config->aplay_dev_name = _get_value(jcfg, "aplay", "device");
 	}
 
 	goto ok;
@@ -82,8 +84,9 @@ ok:
 
 void us_config_destroy(us_config_s *config) {
 	US_DELETE(config->video_sink_name, free);
-	US_DELETE(config->audio_dev_name, free);
+	US_DELETE(config->acap_dev_name, free);
 	US_DELETE(config->tc358743_dev_path, free);
+	US_DELETE(config->aplay_dev_name, free);
 	free(config);
 }
 
@@ -96,6 +99,20 @@ static char *_get_value(janus_config *jcfg, const char *section, const char *opt
 	return us_strdup(option_obj->value);
 }
 
+static uint _get_uint(janus_config *jcfg, const char *section, const char *option, uint def) {
+	char *const tmp = _get_value(jcfg, section, option);
+	uint value = def;
+	if (tmp != NULL) {
+		errno = 0;
+		value = (uint)strtoul(tmp, NULL, 10);
+		if (errno != 0) {
+			value = def;
+		}
+		free(tmp);
+	}
+	return value;
+}
+
 /*static bool _get_bool(janus_config *jcfg, const char *section, const char *option, bool def) {
 	char *const tmp = _get_value(jcfg, section, option);
 	bool value = def;

janus/src/config.h

@@ -23,11 +23,17 @@
 #pragma once
 
 
+#include "uslibs/types.h"
+
+
 typedef struct {
 	char	*video_sink_name;
 
-	char	*audio_dev_name;
+	char	*acap_dev_name;
+	uint	acap_hz;
 	char	*tc358743_dev_path;
+
+	char	*aplay_dev_name;
 } us_config_s;
 
 

janus/src/logging.h

@@ -36,3 +36,8 @@
 		JANUS_LOG(LOG_ERR, "[%s/%-9s] " x_msg ": %s\n", US_PLUGIN_NAME, x_prefix, ##__VA_ARGS__, m_perror_str); \
 		free(m_perror_str); \
 	}
+
+// We don't include alsa, speex and opus headers here
+#define US_JLOG_PERROR_ALSA(_err, _prefix, _msg, ...)	US_JLOG_ERROR(_prefix, _msg ": %s", ##__VA_ARGS__, snd_strerror(_err))
+#define US_JLOG_PERROR_RES(_err, _prefix, _msg, ...)	US_JLOG_ERROR(_prefix, _msg ": %s", ##__VA_ARGS__, speex_resampler_strerror(_err))
+#define US_JLOG_PERROR_OPUS(_err, _prefix, _msg, ...)	US_JLOG_ERROR(_prefix, _msg ": %s", ##__VA_ARGS__, opus_strerror(_err))

janus/src/plugin.c

@@ -25,6 +25,7 @@
 #include <inttypes.h>
 #include <unistd.h>
 #include <fcntl.h>
+#include <errno.h>
 #include <assert.h>
 
 #include <sys/mman.h>
@@ -33,7 +34,9 @@
 #include <pthread.h>
 #include <jansson.h>
 #include <janus/plugins/plugin.h>
+#include <janus/rtp.h>
 #include <janus/rtcp.h>
+#include <alsa/asoundlib.h>
 
 #include "uslibs/types.h"
 #include "uslibs/const.h"
@@ -48,7 +51,8 @@
 #include "const.h"
 #include "logging.h"
 #include "client.h"
-#include "audio.h"
+#include "au.h"
+#include "acap.h"
 #include "rtp.h"
 #include "rtpv.h"
 #include "rtpa.h"
@@ -56,6 +60,8 @@
 #include "config.h"
 
 
+static const char *const	default_ice_url = "stun:stun.l.google.com:19302";
+
 static us_config_s		*_g_config = NULL;
 static const useconds_t	_g_watchers_polling = 100000;
 
@@ -69,31 +75,41 @@ static pthread_t		_g_video_rtp_tid;
 static atomic_bool		_g_video_rtp_tid_created = false;
 static pthread_t		_g_video_sink_tid;
 static atomic_bool		_g_video_sink_tid_created = false;
-static pthread_t		_g_audio_tid;
-static atomic_bool		_g_audio_tid_created = false;
+static pthread_t		_g_acap_tid;
+static atomic_bool		_g_acap_tid_created = false;
+static pthread_t		_g_aplay_tid;
+static atomic_bool		_g_aplay_tid_created = false;
 
 static pthread_mutex_t	_g_video_lock = PTHREAD_MUTEX_INITIALIZER;
-static pthread_mutex_t	_g_audio_lock = PTHREAD_MUTEX_INITIALIZER;
+static pthread_mutex_t	_g_acap_lock = PTHREAD_MUTEX_INITIALIZER;
+static pthread_mutex_t	_g_aplay_lock = PTHREAD_MUTEX_INITIALIZER;
 static atomic_bool		_g_ready = false;
 static atomic_bool		_g_stop = false;
 static atomic_bool		_g_has_watchers = false;
 static atomic_bool		_g_has_listeners = false;
+static atomic_bool		_g_has_speakers = false;
 static atomic_bool		_g_key_required = false;
 
 
 #define _LOCK_VIDEO		US_MUTEX_LOCK(_g_video_lock)
 #define _UNLOCK_VIDEO	US_MUTEX_UNLOCK(_g_video_lock)
 
-#define _LOCK_AUDIO		US_MUTEX_LOCK(_g_audio_lock)
-#define _UNLOCK_AUDIO	US_MUTEX_UNLOCK(_g_audio_lock)
+#define _LOCK_ACAP		US_MUTEX_LOCK(_g_acap_lock)
+#define _UNLOCK_ACAP	US_MUTEX_UNLOCK(_g_acap_lock)
 
-#define _LOCK_ALL		{ _LOCK_VIDEO; _LOCK_AUDIO; }
-#define _UNLOCK_ALL		{ _UNLOCK_AUDIO; _UNLOCK_VIDEO; }
+#define _LOCK_APLAY		US_MUTEX_LOCK(_g_aplay_lock)
+#define _UNLOCK_APLAY	US_MUTEX_UNLOCK(_g_aplay_lock)
+
+#define _LOCK_ALL		{ _LOCK_VIDEO; _LOCK_ACAP; _LOCK_APLAY; }
+#define _UNLOCK_ALL		{ _UNLOCK_APLAY; _UNLOCK_ACAP; _UNLOCK_VIDEO; }
 
 #define _READY			atomic_load(&_g_ready)
 #define _STOP			atomic_load(&_g_stop)
 #define _HAS_WATCHERS	atomic_load(&_g_has_watchers)
 #define _HAS_LISTENERS	atomic_load(&_g_has_listeners)
+#define _HAS_SPEAKERS	atomic_load(&_g_has_speakers)
+
+#define _IF_DISABLED(...) { if (!_READY || _STOP) { __VA_ARGS__ } }
 
 
 janus_plugin *create(void);
@@ -101,7 +117,7 @@ janus_plugin *create(void);
 
 static void *_video_rtp_thread(void *arg) {
 	(void)arg;
-	US_THREAD_SETTLE("us_video_rtp");
+	US_THREAD_SETTLE("us_p_rtpv");
 	atomic_store(&_g_video_rtp_tid_created, true);
 
 	while (!_STOP) {
@@ -120,7 +136,7 @@ static void *_video_rtp_thread(void *arg) {
 
 static void *_video_sink_thread(void *arg) {
 	(void)arg;
-	US_THREAD_SETTLE("us_video_sink");
+	US_THREAD_SETTLE("us_p_vsink");
 	atomic_store(&_g_video_sink_tid_created, true);
 
 	us_frame_s *drop = us_frame_init();
@@ -198,15 +214,23 @@ static void *_video_sink_thread(void *arg) {
 	return NULL;
 }
 
-static int _check_tc358743_audio(uint *audio_hz) {
-	int fd;
-	if ((fd = open(_g_config->tc358743_dev_path, O_RDWR)) < 0) {
-		US_JLOG_PERROR("audio", "Can't open TC358743 V4L2 device");
+static int _get_acap_hz(uint *hz) {
+	if (_g_config->acap_hz != 0) {
+		*hz = _g_config->acap_hz;
+		return 0;
+	}
+	if (_g_config->tc358743_dev_path == NULL) {
+		US_JLOG_ERROR("acap", "No configured sampling rate");
 		return -1;
 	}
-	const int checked = us_tc358743_xioctl_get_audio_hz(fd, audio_hz);
+	int fd;
+	if ((fd = open(_g_config->tc358743_dev_path, O_RDWR)) < 0) {
+		US_JLOG_PERROR("acap", "Can't open TC358743 V4L2 device");
+		return -1;
+	}
+	const int checked = us_tc358743_xioctl_get_audio_hz(fd, hz);
 	if (checked < 0) {
-		US_JLOG_PERROR("audio", "Can't check TC358743 audio state (%d)", checked);
+		US_JLOG_PERROR("acap", "Can't check TC358743 audio state (%d)", checked);
 		close(fd);
 		return -1;
 	}
@@ -214,13 +238,13 @@ static int _check_tc358743_audio(uint *audio_hz) {
 	return 0;
 }
 
-static void *_audio_thread(void *arg) {
+static void *_acap_thread(void *arg) {
 	(void)arg;
-	US_THREAD_SETTLE("us_audio");
-	atomic_store(&_g_audio_tid_created, true);
+	US_THREAD_SETTLE("us_p_ac");
+	atomic_store(&_g_acap_tid_created, true);
 
-	assert(_g_config->audio_dev_name != NULL);
-	assert(_g_config->tc358743_dev_path != NULL);
+	assert(_g_config->acap_dev_name != NULL);
+	assert(_g_rtpa != NULL);
 
 	int once = 0;
 
@@ -230,53 +254,175 @@ static void *_audio_thread(void *arg) {
 			continue;
 		}
 
-		uint audio_hz = 0;
-		us_audio_s *audio = NULL;
+		uint hz = 0;
+		us_acap_s *acap = NULL;
 
-		if (_check_tc358743_audio(&audio_hz) < 0) {
-			goto close_audio;
+		if (!us_au_probe(_g_config->acap_dev_name)) {
+			US_ONCE({ US_JLOG_ERROR("acap", "No PCM capture device"); });
+			goto close_acap;
 		}
-		if (audio_hz == 0) {
-			US_ONCE({ US_JLOG_INFO("audio", "No audio presented from the host"); });
-			goto close_audio;
+		if (_get_acap_hz(&hz) < 0) {
+			goto close_acap;
 		}
-		US_ONCE({ US_JLOG_INFO("audio", "Detected host audio"); });
-		if ((audio = us_audio_init(_g_config->audio_dev_name, audio_hz)) == NULL) {
-			goto close_audio;
+		if (hz == 0) {
+			US_ONCE({ US_JLOG_INFO("acap", "No audio presented from the host"); });
+			goto close_acap;
+		}
+		US_ONCE({ US_JLOG_INFO("acap", "Detected host audio"); });
+		if ((acap = us_acap_init(_g_config->acap_dev_name, hz)) == NULL) {
+			goto close_acap;
 		}
 
 		once = 0;
 
 		while (!_STOP && _HAS_WATCHERS && _HAS_LISTENERS) {
-			if (_check_tc358743_audio(&audio_hz) < 0 || audio->pcm_hz != audio_hz) {
-				goto close_audio;
+			if (_get_acap_hz(&hz) < 0 || acap->pcm_hz != hz) {
+				goto close_acap;
 			}
 			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);
+			const int result = us_acap_get_encoded(acap, data, &size, &pts);
 			if (result == 0) {
-				_LOCK_AUDIO;
+				_LOCK_ACAP;
 				us_rtpa_wrap(_g_rtpa, data, size, pts);
-				_UNLOCK_AUDIO;
+				_UNLOCK_ACAP;
 			} else if (result == -1) {
-				goto close_audio;
+				goto close_acap;
 			}
 		}
 
-	close_audio:
-		US_DELETE(audio, us_audio_destroy);
+	close_acap:
+		US_DELETE(acap, us_acap_destroy);
 		sleep(1); // error_delay
 	}
 	return NULL;
 }
 
+static void *_aplay_thread(void *arg) {
+	(void)arg;
+	US_THREAD_SETTLE("us_p_ap");
+	atomic_store(&_g_aplay_tid_created, true);
+
+	assert(_g_config->aplay_dev_name != NULL);
+
+	int once = 0;
+
+	while (!_STOP) {
+		snd_pcm_t *dev = NULL;
+		bool skip = true;
+
+		while (!_STOP) {
+			usleep((US_AU_FRAME_MS / 4) * 1000);
+
+			us_au_pcm_s mixed = {0};
+			_LOCK_APLAY;
+			US_LIST_ITERATE(_g_clients, client, {
+				us_au_pcm_s last = {0};
+				do {
+					const int ri = us_ring_consumer_acquire(client->aplay_pcm_ring, 0);
+					if (ri >= 0) {
+						const us_au_pcm_s *pcm = client->aplay_pcm_ring->items[ri];
+						memcpy(&last, pcm, sizeof(us_au_pcm_s));
+						us_ring_consumer_release(client->aplay_pcm_ring, ri);
+					} else {
+						break;
+					}
+				} while (skip && !_STOP);
+				us_au_pcm_mix(&mixed, &last);
+				// US_JLOG_INFO("++++++", "mixed %p", client);
+			});
+			_UNLOCK_APLAY;
+			// US_JLOG_INFO("++++++", "--------------");
+
+			if (skip) {
+				static uint skipped = 0;
+				if (skipped < (1000 / (US_AU_FRAME_MS / 4))) {
+					++skipped;
+					continue;
+				} else {
+					skipped = 0;
+				}
+			}
+
+			if (!_HAS_WATCHERS || !_HAS_LISTENERS || !_HAS_SPEAKERS) {
+				goto close_aplay;
+			}
+
+			if (dev == NULL) {
+				if (!us_au_probe(_g_config->aplay_dev_name)) {
+					US_ONCE({ US_JLOG_ERROR("aplay", "No PCM playback device"); });
+					goto close_aplay;
+				}
+
+				int err = snd_pcm_open(&dev, _g_config->aplay_dev_name, SND_PCM_STREAM_PLAYBACK, 0);
+				if (err < 0) {
+					US_ONCE({ US_JLOG_PERROR_ALSA(err, "aplay", "Can't open PCM playback"); });
+					goto close_aplay;
+				}
+
+				err = snd_pcm_set_params(dev, SND_PCM_FORMAT_S16_LE, SND_PCM_ACCESS_RW_INTERLEAVED,
+					US_RTP_OPUS_CH, US_RTP_OPUS_HZ, 1 /* soft resample */, 50000 /* 50000 = 0.05sec */
+				);
+				if (err < 0) {
+					US_ONCE({ US_JLOG_PERROR_ALSA(err, "aplay", "Can't configure PCM playback"); });
+					goto close_aplay;
+				}
+
+				US_JLOG_INFO("aplay", "Playback opened, playing ...");
+				once = 0;
+			}
+
+			if (dev != NULL && mixed.frames > 0) {
+				snd_pcm_sframes_t frames = snd_pcm_writei(dev, mixed.data, mixed.frames);
+				if (frames < 0) {
+					frames = snd_pcm_recover(dev, frames, 1);
+				} else {
+					if (once != 0) {
+						US_JLOG_INFO("aplay", "Playing resumed (snd_pcm_writei) ...");
+					}
+					once = 0;
+					skip = false;
+				}
+				if (frames < 0) {
+					US_ONCE({ US_JLOG_PERROR_ALSA(frames, "aplay", "Can't play to PCM playback"); });
+					if (frames == -ENODEV) {
+						goto close_aplay;
+					}
+					skip = true;
+				} else {
+					if (once != 0) {
+						US_JLOG_INFO("aplay", "Playing resumed (snd_pcm_recover) ...");
+					}
+					once = 0;
+					skip = false;
+				}
+			}
+		}
+
+	close_aplay:
+		if (dev != NULL) {
+			US_DELETE(dev, snd_pcm_close);
+			US_JLOG_INFO("aplay", "Playback closed");
+		}
+	}
+	return NULL;
+}
+
 static void _relay_rtp_clients(const us_rtp_s *rtp) {
 	US_LIST_ITERATE(_g_clients, client, {
 		us_janus_client_send(client, rtp);
 	});
 }
 
+static void _alsa_quiet(const char *file, int line, const char *func, int err, const char *fmt, ...) {
+	(void)file;
+	(void)line;
+	(void)func;
+	(void)err;
+	(void)fmt;
+}
+
 static int _plugin_init(janus_callbacks *gw, const char *config_dir_path) {
 	// https://groups.google.com/g/meetecho-janus/c/xoWIQfaoJm8
 	// sysctl -w net.core.rmem_default=500000 
@@ -290,11 +436,16 @@ static int _plugin_init(janus_callbacks *gw, const char *config_dir_path) {
 	}
 	_g_gw = gw;
 
+	snd_lib_error_set_handler(_alsa_quiet);
+
 	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)) {
+	if (_g_config->acap_dev_name != NULL) {
 		_g_rtpa = us_rtpa_init(_relay_rtp_clients);
-		US_THREAD_CREATE(_g_audio_tid, _audio_thread, NULL);
+		US_THREAD_CREATE(_g_acap_tid, _acap_thread, NULL);
+		if (_g_config->aplay_dev_name != NULL) {
+			US_THREAD_CREATE(_g_aplay_tid, _aplay_thread, NULL);
+		}
 	}
 	US_THREAD_CREATE(_g_video_rtp_tid, _video_rtp_thread, NULL);
 	US_THREAD_CREATE(_g_video_sink_tid, _video_sink_thread, NULL);
@@ -310,7 +461,8 @@ static void _plugin_destroy(void) {
 #	define JOIN(_tid) { if (atomic_load(&_tid##_created)) { US_THREAD_JOIN(_tid); } }
 	JOIN(_g_video_sink_tid);
 	JOIN(_g_video_rtp_tid);
-	JOIN(_g_audio_tid);
+	JOIN(_g_acap_tid);
+	JOIN(_g_aplay_tid);
 #	undef JOIN
 
 	US_LIST_ITERATE(_g_clients, client, {
@@ -325,8 +477,6 @@ static void _plugin_destroy(void) {
 	US_DELETE(_g_config, us_config_destroy);
 }
 
-#define _IF_DISABLED(...) { if (!_READY || _STOP) { __VA_ARGS__ } }
-
 static void _plugin_create_session(janus_plugin_session *session, int *err) {
 	_IF_DISABLED({ *err = -1; return; });
 	_LOCK_ALL;
@@ -343,6 +493,7 @@ static void _plugin_destroy_session(janus_plugin_session* session, int *err) {
 	bool found = false;
 	bool has_watchers = false;
 	bool has_listeners = false;
+	bool has_speakers = false;
 	US_LIST_ITERATE(_g_clients, client, {
 		if (client->session == session) {
 			US_JLOG_INFO("main", "Removing session %p ...", session);
@@ -351,7 +502,8 @@ static void _plugin_destroy_session(janus_plugin_session* session, int *err) {
 			found = true;
 		} else {
 			has_watchers = (has_watchers || atomic_load(&client->transmit));
-			has_listeners = (has_listeners || atomic_load(&client->transmit_audio));
+			has_listeners = (has_listeners || atomic_load(&client->transmit_acap));
+			has_speakers = (has_speakers || atomic_load(&client->transmit_aplay));
 		}
 	});
 	if (!found) {
@@ -360,6 +512,7 @@ static void _plugin_destroy_session(janus_plugin_session* session, int *err) {
 	}
 	atomic_store(&_g_has_watchers, has_watchers);
 	atomic_store(&_g_has_listeners, has_listeners);
+	atomic_store(&_g_has_speakers, has_speakers);
 	_UNLOCK_ALL;
 }
 
@@ -398,8 +551,6 @@ static void _set_transmit(janus_plugin_session *session, const char *msg, bool t
 	_UNLOCK_ALL;
 }
 
-#undef _IF_DISABLED
-
 static void _plugin_setup_media(janus_plugin_session *session) { _set_transmit(session, "Unmuted", true); }
 static void _plugin_hangup_media(janus_plugin_session *session) { _set_transmit(session, "Muted", false); }
 
@@ -458,15 +609,22 @@ static struct janus_plugin_result *_plugin_handle_message(
 		PUSH_STATUS("stopped", NULL, NULL);
 
 	} else if (!strcmp(request_str, "watch")) {
-		bool with_audio = false;
 		uint video_orient = 0;
+		bool with_acap = false;
+		bool with_aplay = false;
 		{
 			json_t *const params = json_object_get(msg, "params");
 			if (params != NULL) {
 				{
 					json_t *const obj = json_object_get(params, "audio");
 					if (obj != NULL && json_is_boolean(obj)) {
-						with_audio = (_g_rtpa != NULL && json_boolean_value(obj));
+						with_acap = (us_au_probe(_g_config->acap_dev_name) && json_boolean_value(obj));
+					}
+				}
+				{
+					json_t *const obj = json_object_get(params, "mic");
+					if (obj != NULL && json_is_boolean(obj)) {
+						with_aplay = (us_au_probe(_g_config->aplay_dev_name) && json_boolean_value(obj));
 					}
 				}
 				{
@@ -485,7 +643,7 @@ static struct janus_plugin_result *_plugin_handle_message(
 		{
 			char *sdp;
 			char *const video_sdp = us_rtpv_make_sdp(_g_rtpv);
-			char *const audio_sdp = (with_audio ? us_rtpa_make_sdp(_g_rtpa) : us_strdup(""));
+			char *const audio_sdp = (with_acap ? us_rtpa_make_sdp(_g_rtpa, with_aplay) : us_strdup(""));
 			US_ASPRINTF(sdp,
 				"v=0" RN
 				"o=- %" PRIu64 " 1 IN IP4 0.0.0.0" RN
@@ -514,19 +672,30 @@ static struct janus_plugin_result *_plugin_handle_message(
 		{
 			_LOCK_ALL;
 			bool has_listeners = false;
+			bool has_speakers = false;
 			US_LIST_ITERATE(_g_clients, client, {
 				if (client->session == session) {
-					atomic_store(&client->transmit_audio, with_audio);
+					atomic_store(&client->transmit_acap, with_acap);
+					atomic_store(&client->transmit_aplay, with_aplay);
 					atomic_store(&client->video_orient, video_orient);
 				}
-				has_listeners = (has_listeners || atomic_load(&client->transmit_audio));
+				has_listeners = (has_listeners || atomic_load(&client->transmit_acap));
+				has_speakers = (has_speakers || atomic_load(&client->transmit_aplay));
 			});
 			atomic_store(&_g_has_listeners, has_listeners);
+			atomic_store(&_g_has_speakers, has_speakers);
 			_UNLOCK_ALL;
 		}
 
 	} else if (!strcmp(request_str, "features")) {
-		json_t *const features = json_pack("{sb}", "audio", (_g_rtpa != NULL));
+		const char *const ice_url = getenv("JANUS_USTREAMER_WEB_ICE_URL");
+		const bool acap_avail = us_au_probe(_g_config->acap_dev_name);
+		json_t *const features = json_pack(
+			"{s:b, s:b, s:{s:s?}}",
+			"audio", acap_avail,
+			"mic", (acap_avail && us_au_probe(_g_config->aplay_dev_name)),
+			"ice", "url", (ice_url != NULL ? ice_url : default_ice_url)
+		);
 		PUSH_STATUS("features", features, NULL);
 		json_decref(features);
 
@@ -551,10 +720,27 @@ done:
 #	undef PUSH_ERROR
 }
 
-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)) {
+static void _plugin_incoming_rtp(janus_plugin_session *session, janus_plugin_rtp *packet) {
+	_IF_DISABLED({ return; });
+	if (session == NULL || packet == NULL || packet->video) {
+		return; // Accept only valid audio
+	}
+	_LOCK_APLAY;
+	US_LIST_ITERATE(_g_clients, client, {
+		if (client->session == session) {
+			us_janus_client_recv(client, packet);
+			break;
+		}
+	});
+	_UNLOCK_APLAY;
+}
+
+static void _plugin_incoming_rtcp(janus_plugin_session *session, janus_plugin_rtcp *packet) {
+	_IF_DISABLED({ return; });
+	if (session == NULL || packet == NULL || !packet->video) {
+		return; // Accept only valid video
+	}
+	if (janus_rtcp_has_pli(packet->buffer, packet->length)) {
 		// US_JLOG_INFO("main", "Got video PLI");
 		atomic_store(&_g_key_required, true);
 	}
@@ -595,6 +781,7 @@ janus_plugin *create(void) {
 		.get_author = _plugin_get_author,
 		.get_package = _plugin_get_package,
 
+		.incoming_rtp = _plugin_incoming_rtp,
 		.incoming_rtcp = _plugin_incoming_rtcp,
 	);
 #	pragma GCC diagnostic pop

janus/src/rtp.h

@@ -28,6 +28,13 @@
 // https://stackoverflow.com/questions/47635545/why-webrtc-chose-rtp-max-packet-size-to-1200-bytes
 #define US_RTP_DATAGRAM_SIZE	1200
 #define US_RTP_HEADER_SIZE		12
+#define US_RTP_PAYLOAD_SIZE		(US_RTP_DATAGRAM_SIZE - US_RTP_HEADER_SIZE)
+
+#define US_RTP_H264_PAYLOAD		96
+#define US_RTP_OPUS_PAYLOAD		111
+
+#define US_RTP_OPUS_HZ			48000
+#define US_RTP_OPUS_CH			2
 
 
 typedef struct {

janus/src/rtpa.c

@@ -33,7 +33,7 @@ us_rtpa_s *us_rtpa_init(us_rtp_callback_f callback) {
 	us_rtpa_s *rtpa;
 	US_CALLOC(rtpa, 1);
 	rtpa->rtp = us_rtp_init();
-	us_rtp_assign(rtpa->rtp, 111, false);
+	us_rtp_assign(rtpa->rtp, US_RTP_OPUS_PAYLOAD, false);
 	rtpa->callback = callback;
 	return rtpa;
 }
@@ -43,21 +43,26 @@ void us_rtpa_destroy(us_rtpa_s *rtpa) {
 	free(rtpa);
 }
 
-char *us_rtpa_make_sdp(us_rtpa_s *rtpa) {
+char *us_rtpa_make_sdp(us_rtpa_s *rtpa, bool mic) {
 	const uint pl = rtpa->rtp->payload;
 	char *sdp;
 	US_ASPRINTF(sdp,
 		"m=audio 1 RTP/SAVPF %u" RN
 		"c=IN IP4 0.0.0.0" RN
-		"a=rtpmap:%u OPUS/48000/2" RN
+		"a=rtpmap:%u OPUS/%u/%u" RN
 		"a=fmtp:%u sprop-stereo=1" RN // useinbandfec=1
 		"a=rtcp-fb:%u nack" RN
 		"a=rtcp-fb:%u nack pli" RN
 		"a=rtcp-fb:%u goog-remb" RN
+		"a=mid:a" RN
+		"a=msid:audio a" RN
 		"a=ssrc:%" PRIu32 " cname:ustreamer" RN
-		"a=sendonly" RN,
-		pl, pl, pl, pl, pl, pl,
-		rtpa->rtp->ssrc
+		"a=%s" RN,
+		pl, pl,
+		US_RTP_OPUS_HZ, US_RTP_OPUS_CH,
+		pl, pl, pl, pl,
+		rtpa->rtp->ssrc,
+		(mic ? "sendrecv" : "sendonly")
 	);
 	return sdp;
 }

janus/src/rtpa.h

@@ -36,5 +36,5 @@ typedef struct {
 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);
+char *us_rtpa_make_sdp(us_rtpa_s *rtpa, bool mic);
 void us_rtpa_wrap(us_rtpa_s *rtpa, const u8 *data, uz size, u32 pts);

janus/src/rtpv.c

@@ -45,7 +45,7 @@ us_rtpv_s *us_rtpv_init(us_rtp_callback_f callback) {
 	us_rtpv_s *rtpv;
 	US_CALLOC(rtpv, 1);
 	rtpv->rtp = us_rtp_init();
-	us_rtp_assign(rtpv->rtp, 96, true);
+	us_rtp_assign(rtpv->rtp, US_RTP_H264_PAYLOAD, true);
 	rtpv->callback = callback;
 	return rtpv;
 }
@@ -69,6 +69,8 @@ char *us_rtpv_make_sdp(us_rtpv_s *rtpv) {
 		"a=rtcp-fb:%u nack" RN
 		"a=rtcp-fb:%u nack pli" RN
 		"a=rtcp-fb:%u goog-remb" RN
+		"a=mid:v" RN
+		"a=msid:video v" RN
 		"a=ssrc:%" PRIu32 " cname:ustreamer" RN
 		"a=extmap:1 http://www.webrtc.org/experiments/rtp-hdrext/playout-delay" RN
 		"a=extmap:2 urn:3gpp:video-orientation" RN

linters/tox.ini

@@ -3,7 +3,7 @@ envlist = cppcheck, flake8, pylint, mypy, vulture, htmlhint
 skipsdist = true
 
 [testenv]
-basepython = python3.12
+basepython = python3.13
 changedir = /src
 
 [testenv:cppcheck]

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 6.20" "January 2021"
+.TH USTREAMER-DUMP 1 "version 6.44" "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 6.20" "November 2020"
+.TH USTREAMER 1 "version 6.44" "November 2020"
 
 .SH NAME
 ustreamer \- stream MJPEG video from any V4L2 device to the network
@@ -52,7 +52,7 @@ Initial image resolution. Default: 640x480.
 .TP
 .BR \-m\ \fIfmt ", " \-\-format\ \fIfmt
 Image format.
-Available: YUYV, YVYU, UYVY, RGB565, RGB24, JPEG; default: YUYV.
+Available: YUYV, YVYU, UYVY, YUV420, YVU420, RGB565, RGB24, GREY, MJPEG, JPEG; default: YUYV.
 .TP
 .BR \-a\ \fIstd ", " \-\-tv\-standard\ \fIstd
 Force TV standard.
@@ -274,7 +274,10 @@ Timeout for lock. Default: 1.
 .SS "Process options"
 .TP
 .BR \-\-exit\-on\-parent\-death
-Exit the program if the parent process is dead. Required \fBHAS_PDEATHSIG\fR feature. Default: disabled.
+Exit the program if the parent process is dead. Required \fBWITH_PDEATHSIG\fR feature. Default: disabled.
+.TP
+.BR \-\-exit\-on\-device\-error
+Exit on any device error instead of polling until success. Default: disabled.
 .TP
 .BR \-\-exit\-on\-no\-clients \fIsec
 Exit the program if there have been no stream or sink clients or any HTTP requests in the last N seconds. Default: 0 (disabled).

pkg/arch/PKGBUILD

@@ -3,7 +3,7 @@
 
 
 pkgname=ustreamer
-pkgver=6.20
+pkgver=6.44
 pkgrel=1
 pkgdesc="Lightweight and fast MJPEG-HTTP streamer"
 url="https://github.com/pikvm/ustreamer"
@@ -18,7 +18,7 @@ md5sums=(SKIP)
 _options="WITH_GPIO=1 WITH_SYSTEMD=1"
 if [ -e /usr/bin/python3 ]; then
 	_options="$_options WITH_PYTHON=1"
-	depends+=(python)
+	depends+=("python>=3.13" "python<3.14")
 	makedepends+=(python-setuptools python-pip python-build python-wheel)
 fi
 if [ -e /usr/include/janus/plugins/plugin.h ];then

pkg/openwrt/Makefile

@@ -6,7 +6,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=ustreamer
-PKG_VERSION:=6.20
+PKG_VERSION:=6.44
 PKG_RELEASE:=1
 PKG_MAINTAINER:=Maxim Devaev <mdevaev@gmail.com>
 
@@ -25,7 +25,7 @@ define Package/ustreamer
   SECTION:=multimedia
   CATEGORY:=Multimedia
   TITLE:=uStreamer
-  DEPENDS:=+libpthread +libjpeg +libv4l +libbsd +libevent2 +libevent2-core +libevent2-extra +libevent2-pthreads
+  DEPENDS:=+libatomic +libpthread +libjpeg +libv4l +libbsd +libevent2 +libevent2-core +libevent2-extra +libevent2-pthreads
   URL:=https://github.com/pikvm/ustreamer
 endef
 

python/Makefile

@@ -1,5 +1,3 @@
--include ../config.mk
-
 R_DESTDIR ?=
 PREFIX ?= /usr/local
 
@@ -8,7 +6,7 @@ PY ?= python3
 
 # =====
 all: root
-root: $(shell find src -type f,l)
+root: $(shell find src -type f,l) setup.py
 	$(info == PY_BUILD ustreamer-*.so)
 	rm -rf root
 	$(ECHO) $(PY) -m build --skip-dependency-check --no-isolation

python/setup.py

@@ -5,19 +5,36 @@ from setuptools import setup
 
 
 # =====
-def _find_sources(suffix: str) -> list[str]:
+def _find_sources() -> list[str]:
     sources: list[str] = []
     for (root_path, _, names) in os.walk("src"):
         for name in names:
-            if name.endswith(suffix):
+            if name.endswith(".c"):
                 sources.append(os.path.join(root_path, name))
     return sources
 
 
-if __name__ == "__main__":
+def _find_flags() -> dict[str, bool]:
+    return {
+        key[3:]: (value.strip().lower() in ["true", "on", "1"])
+        for (key, value) in sorted(os.environ.items())
+        if key.startswith("MK_WITH_")
+    }
+
+
+def _make_d_features(flags: dict[str, bool]) -> str:
+    features = " ".join([
+        f"{key}={int(value)}"
+        for (key, value) in flags.items()
+    ])
+    return f"-DUS_FEATURES=\"{features}\""
+
+
+def main() -> None:
+    flags = _find_flags()
     setup(
         name="ustreamer",
-        version="6.20",
+        version="6.44",
         description="uStreamer tools",
         author="Maxim Devaev",
         author_email="mdevaev@gmail.com",
@@ -26,9 +43,16 @@ if __name__ == "__main__":
             Extension(
                 "ustreamer",
                 libraries=["rt", "m", "pthread"],
-                extra_compile_args=["-std=c17", "-D_GNU_SOURCE"],
+                extra_compile_args=[
+                    "-std=c17", "-D_GNU_SOURCE",
+                    _make_d_features(flags),
+                ],
                 undef_macros=["NDEBUG"],
-                sources=_find_sources(".c"),
+                sources=_find_sources(),
             ),
         ],
     )
+
+
+if __name__ == "__main__":
+    main()

python/src/uslibs/const.h

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

python/src/ustreamer.c

@@ -13,6 +13,7 @@
 
 #include <Python.h>
 
+#include "uslibs/const.h"
 #include "uslibs/types.h"
 #include "uslibs/errors.h"
 #include "uslibs/tools.h"
@@ -48,6 +49,8 @@ static void _MemsinkObject_destroy_internals(_MemsinkObject *self) {
 }
 
 static int _MemsinkObject_init(_MemsinkObject *self, PyObject *args, PyObject *kwargs) {
+	self->fd = -1;
+
 	self->lock_timeout = 1;
 	self->wait_timeout = 1;
 
@@ -228,7 +231,8 @@ static PyObject *_MemsinkObject_wait_frame(_MemsinkObject *self, PyObject *args,
 			} \
 			Py_DECREF(m_tmp); \
 		}
-#	define SET_NUMBER(x_key, x_from, x_to) SET_VALUE(#x_key, Py##x_to##_From##x_from(self->frame->x_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);
@@ -275,7 +279,8 @@ static PyMethodDef _MemsinkObject_methods[] = {
 };
 
 static PyGetSetDef _MemsinkObject_getsets[] = {
-#	define ADD_GETTER(x_field) {.name = #x_field, .get = (getter)_MemsinkObject_getter_##x_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),
@@ -304,20 +309,30 @@ static PyModuleDef _Module = {
 };
 
 PyMODINIT_FUNC PyInit_ustreamer(void) {
-	PyObject *module = PyModule_Create(&_Module);
-	if (module == NULL) {
-		return NULL;
-	}
+	PyObject *module = NULL;
 
 	if (PyType_Ready(&_MemsinkType) < 0) {
-		return NULL;
+		goto error;
 	}
 
-	Py_INCREF(&_MemsinkType);
-
-	if (PyModule_AddObject(module, "Memsink", (PyObject*)&_MemsinkType) < 0) {
-		return NULL;
+	if ((module = PyModule_Create(&_Module)) == NULL) {
+		goto error;
 	}
 
+#	define ADD(x_what, x_key, x_value) \
+		{ if (PyModule_Add##x_what(module, x_key, x_value) < 0) { goto error; } }
+	ADD(StringConstant, "__version__", US_VERSION);
+	ADD(StringConstant, "VERSION", US_VERSION);
+	ADD(IntConstant, "VERSION_MAJOR", US_VERSION_MAJOR);
+	ADD(IntConstant, "VERSION_MINOR", US_VERSION_MINOR);
+	ADD(StringConstant, "FEATURES", US_FEATURES); // Defined in setup.py
+	ADD(ObjectRef, "Memsink", (PyObject*)&_MemsinkType);
+#	undef ADD
 	return module;
+
+error:
+	if (module != NULL) {
+		Py_DECREF(module);
+	}
+	return NULL;
 }

src/Makefile

@@ -2,6 +2,7 @@ R_DESTDIR ?=
 PREFIX ?= /usr/local
 
 CC ?= gcc
+PKG_CONFIG ?= pkg-config
 CFLAGS ?= -O3
 LDFLAGS ?=
 
@@ -13,9 +14,9 @@ _V4P = ustreamer-v4p.bin
 
 _CFLAGS = -MD -c -std=c17 -Wall -Wextra -D_GNU_SOURCE $(CFLAGS)
 
-_USTR_LDFLAGS = $(LDFLAGS) -lm -ljpeg -pthread -lrt -latomic -levent -levent_pthreads
-_DUMP_LDFLAGS = $(LDFLAGS) -lm -ljpeg -pthread -lrt -latomic
-_V4P_LDFLAGS = $(LDFLAGS) -lm -ljpeg -pthread -lrt -latomic
+_USTR_LDFLAGS = $(LDFLAGS) -lm -ljpeg -pthread -lrt -levent -levent_pthreads
+_DUMP_LDFLAGS = $(LDFLAGS) -lm -ljpeg -pthread -lrt
+_V4P_LDFLAGS = $(LDFLAGS) -lm -ljpeg -pthread -lrt
 
 _USTR_SRCS = $(shell ls \
 	libs/*.c \
@@ -40,53 +41,59 @@ _V4P_SRCS = $(shell ls \
 
 _BUILD = build
 
-
 _TARGETS = $(_USTR) $(_DUMP)
 _OBJS = $(_USTR_SRCS:%.c=$(_BUILD)/%.o) $(_DUMP_SRCS:%.c=$(_BUILD)/%.o)
 
 
-define optbool
-$(filter $(shell echo $(1) | tr A-Z a-z), yes on 1)
-endef
+# =====
+ifneq ($(shell sh -c 'uname 2>/dev/null || echo Unknown'),FreeBSD)
+override _USTR_LDFLAGS += -latomic
+override _DUMP_LDFLAGS += -latomic
+override _V4P_LDFLAGS += -latomic
+endif
 
+ifneq ($(MK_WITH_PYTHON),)
+override _CFLAGS += -DMK_WITH_PYTHON
+endif
 
-ifneq ($(call optbool,$(WITH_GPIO)),)
-override _CFLAGS += -DWITH_GPIO $(shell pkg-config --atleast-version=2 libgpiod 2> /dev/null && echo -DHAVE_GPIOD2)
+ifneq ($(MK_WITH_JANUS),)
+override _CFLAGS += -DMK_WITH_JANUS
+endif
+
+ifneq ($(MK_WITH_GPIO),)
+override _CFLAGS += -DMK_WITH_GPIO -DWITH_GPIO $(shell $(PKG_CONFIG) --atleast-version=2 libgpiod 2> /dev/null && echo -DHAVE_GPIOD2)
 override _USTR_LDFLAGS += -lgpiod
 override _USTR_SRCS += $(shell ls ustreamer/gpio/*.c)
 endif
 
-
-ifneq ($(call optbool,$(WITH_SYSTEMD)),)
-override _CFLAGS += -DWITH_SYSTEMD
+ifneq ($(MK_WITH_SYSTEMD),)
+override _CFLAGS += -DMK_WITH_SYSTEMD -DWITH_SYSTEMD
 override _USTR_LDFLAGS += -lsystemd
 override _USTR_SRCS += $(shell ls ustreamer/http/systemd/*.c)
 endif
 
-
-WITH_PTHREAD_NP ?= 1
-ifneq ($(call optbool,$(WITH_PTHREAD_NP)),)
-override _CFLAGS += -DWITH_PTHREAD_NP
+ifneq ($(MK_WITH_PTHREAD_NP),)
+override _CFLAGS += -DMK_WITH_PTHREAD_NP -DWITH_PTHREAD_NP
 endif
 
-
-WITH_SETPROCTITLE ?= 1
-ifneq ($(call optbool,$(WITH_SETPROCTITLE)),)
-override _CFLAGS += -DWITH_SETPROCTITLE
+ifneq ($(MK_WITH_SETPROCTITLE),)
+override _CFLAGS += -DMK_WITH_SETPROCTITLE -DWITH_SETPROCTITLE
 ifeq ($(shell uname -s | tr A-Z a-z),linux)
 override _USTR_LDFLAGS += -lbsd
 endif
 endif
 
+ifneq ($(MK_WITH_PDEATHSIG),)
+override _CFLAGS += -DMK_WITH_PDEATHSIG -DWITH_PDEATHSIG
+endif
 
-WITH_V4P ?= 0
-ifneq ($(call optbool,$(WITH_V4P)),)
+ifneq ($(MK_WITH_V4P),)
 override _TARGETS += $(_V4P)
 override _OBJS += $(_V4P_SRCS:%.c=$(_BUILD)/%.o)
-override _CFLAGS += -DWITH_V4P $(shell pkg-config --cflags libdrm)
-override _V4P_LDFLAGS += $(shell pkg-config --libs libdrm)
+override _CFLAGS += -DMK_WITH_V4P -DWITH_V4P $(shell $(PKG_CONFIG) --cflags libdrm)
+override _V4P_LDFLAGS += $(shell $(PKG_CONFIG) --libs libdrm)
 override _USTR_SRCS += $(shell ls libs/drm/*.c)
-override _USTR_LDFLAGS += $(shell pkg-config --libs libdrm)
+override _USTR_LDFLAGS += $(shell $(PKG_CONFIG) --libs libdrm)
 endif
 
 

src/libs/capture.c

@@ -48,6 +48,7 @@
 #include "threading.h"
 #include "frame.h"
 #include "xioctl.h"
+#include "tc358743.h"
 
 
 static const struct {
@@ -67,6 +68,9 @@ static const struct {
 	{"YUYV",	V4L2_PIX_FMT_YUYV},
 	{"YVYU",	V4L2_PIX_FMT_YVYU},
 	{"UYVY",	V4L2_PIX_FMT_UYVY},
+	{"YUV420",	V4L2_PIX_FMT_YUV420},
+	{"YVU420",	V4L2_PIX_FMT_YVU420},
+	{"GREY",	V4L2_PIX_FMT_GREY},
 	{"RGB565",	V4L2_PIX_FMT_RGB565},
 	{"RGB24",	V4L2_PIX_FMT_RGB24},
 	{"BGR24",	V4L2_PIX_FMT_BGR24},
@@ -190,12 +194,18 @@ int us_capture_open(us_capture_s *cap) {
 	_LOG_DEBUG("Capture device fd=%d opened", run->fd);
 
 	if (cap->dv_timings && cap->persistent) {
+		struct v4l2_control ctl = {.id = V4L2_CID_DV_RX_POWER_PRESENT};
+		if (!us_xioctl(run->fd, VIDIOC_G_CTRL, &ctl)) {
+			if (!ctl.value) {
+				goto error_no_cable;
+			}
+		}
 		_LOG_DEBUG("Probing DV-timings or QuerySTD ...");
-		if (_capture_open_dv_timings(cap, false) < 0) {
-			US_ONCE_FOR(run->open_error_once, __LINE__, {
-				_LOG_ERROR("No signal from source");
-			});
-			goto error_no_signal;
+		switch (_capture_open_dv_timings(cap, false)) {
+			case 0: break;
+			case US_ERROR_NO_SIGNAL: goto error_no_signal;
+			case US_ERROR_NO_SYNC: goto error_no_sync;
+			default: goto error;
 		}
 	}
 
@@ -213,6 +223,15 @@ int us_capture_open(us_capture_s *cap) {
 	if (_capture_open_format(cap, true) < 0) {
 		goto error;
 	}
+	if (cap->dv_timings && cap->persistent) {
+		struct v4l2_control ctl = {.id = TC358743_CID_LANES_ENOUGH};
+		if (!us_xioctl(run->fd, VIDIOC_G_CTRL, &ctl)) {
+			if (!ctl.value) {
+				_LOG_ERROR("Not enough lanes, hardware can't handle this signal");
+				goto error_no_lanes;
+			}
+		}
+	}
 	_capture_open_hw_fps(cap);
 	_capture_open_jpeg_quality(cap);
 	if (_capture_open_io_method(cap) < 0) {
@@ -245,9 +264,23 @@ error_no_device:
 	us_capture_close(cap);
 	return US_ERROR_NO_DEVICE;
 
-error_no_signal:
+error_no_cable:
 	us_capture_close(cap);
-	return US_ERROR_NO_DATA;
+	return US_ERROR_NO_CABLE;
+
+error_no_signal:
+	US_ONCE_FOR(run->open_error_once, __LINE__, { _LOG_ERROR("No signal from source"); });
+	us_capture_close(cap);
+	return US_ERROR_NO_SIGNAL;
+
+error_no_sync:
+	US_ONCE_FOR(run->open_error_once, __LINE__, { _LOG_ERROR("No sync on signal"); });
+	us_capture_close(cap);
+	return US_ERROR_NO_SYNC;
+
+error_no_lanes:
+	us_capture_close(cap);
+	return US_ERROR_NO_LANES;
 
 error:
 	run->open_error_once = 0;
@@ -536,19 +569,28 @@ bool _capture_is_buffer_valid(const us_capture_s *cap, const struct v4l2_buffer
 	if (us_is_jpeg(cap->run->format)) {
 		if (buf->bytesused < 125) {
 			// https://stackoverflow.com/questions/2253404/what-is-the-smallest-valid-jpeg-file-size-in-bytes
-			_LOG_DEBUG("Discarding invalid frame, too small to be a valid JPEG: bytesused=%u", buf->bytesused);
+			_LOG_DEBUG("Discarding invalid frame, too small to be a valid JPEG: bytesused=%u",
+				buf->bytesused);
 			return false;
 		}
 
-		const u8 *const end_ptr = data + buf->bytesused;
-		const u8 *const eoi_ptr = end_ptr - 2;
-		const u16 eoi_marker = (((u16)(eoi_ptr[0]) << 8) | eoi_ptr[1]);
-		if (eoi_marker != 0xFFD9 && eoi_marker != 0xD900 && eoi_marker != 0x0000) {
+		const u16 begin_marker = (((u16)(data[0]) << 8) | data[1]);
+		if (begin_marker != 0xFFD8) {
+			_LOG_DEBUG("Discarding JPEG frame with invalid header: begin_marker=0x%04x, bytesused=%u",
+				begin_marker, buf->bytesused);
+			return false;
+		}
+
+		const u8 *const end_ptr = data + buf->bytesused - 2;
+		const u16 end_marker = (((u16)(end_ptr[0]) << 8) | end_ptr[1]);
+		if (end_marker != 0xFFD9 && end_marker != 0xD900 && end_marker != 0x0000) {
 			if (!cap->allow_truncated_frames) {
-				_LOG_DEBUG("Discarding truncated JPEG frame: eoi_marker=0x%04x, bytesused=%u", eoi_marker, buf->bytesused);
+				_LOG_DEBUG("Discarding truncated JPEG frame: end_marker=0x%04x, bytesused=%u",
+					end_marker, buf->bytesused);
 				return false;
 			}
-			_LOG_DEBUG("Got truncated JPEG frame: eoi_marker=0x%04x, bytesused=%u", eoi_marker, buf->bytesused);
+			_LOG_DEBUG("Got truncated JPEG frame: end_marker=0x%04x, bytesused=%u",
+				end_marker, buf->bytesused);
 		}
 	}
 
@@ -617,6 +659,10 @@ static int _capture_open_dv_timings(us_capture_s *cap, bool apply) {
 		// TC358743 errors here (see in the kernel: drivers/media/i2c/tc358743.c):
 		//   - ENOLINK: No valid signal (SYS_STATUS & MASK_S_TMDS)
 		//   - ENOLCK:  No sync on signal (SYS_STATUS & MASK_S_SYNC)
+		switch (errno) {
+			case ENOLINK: return US_ERROR_NO_SIGNAL;
+			case ENOLCK: return US_ERROR_NO_SYNC;
+		}
 		dv_errno = errno;
 		goto querystd;
 	} else if (!apply) {

src/libs/capture.h

@@ -39,7 +39,7 @@
 #define US_VIDEO_MAX_FPS		((uint)120)
 
 #define US_STANDARDS_STR		"PAL, NTSC, SECAM"
-#define US_FORMATS_STR			"YUYV, YVYU, UYVY, RGB565, RGB24, BGR24, MJPEG, JPEG"
+#define US_FORMATS_STR			"YUYV, YVYU, UYVY, YUV420, YVU420, RGB565, RGB24, BGR24, GREY, MJPEG, JPEG"
 #define US_IO_METHODS_STR		"MMAP, USERPTR"
 
 

src/libs/const.h

@@ -26,7 +26,7 @@
 
 
 #define US_VERSION_MAJOR 6
-#define US_VERSION_MINOR 20
+#define US_VERSION_MINOR 44
 
 #define US_MAKE_VERSION2(_major, _minor) #_major "." #_minor
 #define US_MAKE_VERSION1(_major, _minor) US_MAKE_VERSION2(_major, _minor)

src/libs/drm/drm.c

@@ -28,7 +28,9 @@
 
 #include <sys/mman.h>
 #include <sys/stat.h>
-#include <sys/sysmacros.h>
+#ifdef __linux__
+#	include <sys/sysmacros.h>
+#endif
 
 #include <linux/videodev2.h>
 
@@ -376,7 +378,7 @@ int us_drm_expose_stub(us_drm_s *drm, us_drm_stub_e stub, const us_capture_s *ca
 			DRAW_MSG("=== PiKVM ===\n \n< UNSUPPORTED CAPTURE FORMAT >");
 			break;
 		case US_DRM_STUB_NO_SIGNAL:
-			DRAW_MSG("=== PiKVM ===\n \n< NO SIGNAL >");
+			DRAW_MSG("=== PiKVM ===\n \n< NO LIVE VIDEO >");
 			break;
 		case US_DRM_STUB_BUSY:
 			DRAW_MSG("=== PiKVM ===\n \n< ONLINE IS ACTIVE >");
@@ -664,6 +666,15 @@ static drmModeModeInfo *_find_best_mode(drmModeConnector *conn, uint width, uint
 			continue; // Discard interlaced
 		}
 		const float mode_hz = _get_refresh_rate(mode);
+		if (width == 640 && height == 416 && mode->hdisplay == 640 && mode->vdisplay == 480) {
+			// A special case for some ancient DOS device with VGA converter.
+			// @CapnKirk in Discord
+			if (hz > 0 && mode_hz < hz) {
+				best = mode;
+				best->vdisplay = 416;
+				break;
+			}
+		}
 		if (mode->hdisplay == width && mode->vdisplay == height) {
 			best = mode; // Any mode with exact resolution
 			if (hz > 0 && mode_hz == hz) {

src/libs/errors.h

@@ -24,4 +24,8 @@
 
 #define US_ERROR_COMMON		-1
 #define US_ERROR_NO_DEVICE	-2
-#define US_ERROR_NO_DATA	-3
+#define US_ERROR_NO_CABLE	-3
+#define US_ERROR_NO_SIGNAL	-4
+#define US_ERROR_NO_SYNC	-5
+#define US_ERROR_NO_LANES	-6
+#define US_ERROR_NO_DATA	-7

src/libs/frame.c

@@ -36,7 +36,7 @@
 us_frame_s *us_frame_init(void) {
 	us_frame_s *frame;
 	US_CALLOC(frame, 1);
-	us_frame_realloc_data(frame, 512 * 1024);
+	us_frame_realloc_data(frame, 32 * 1024);
 	frame->dma_fd = -1;
 	return frame;
 }
@@ -82,16 +82,32 @@ bool us_frame_compare(const us_frame_s *a, const us_frame_s *b) {
 uint us_frame_get_padding(const us_frame_s *frame) {
 	uint bytes_per_pixel = 0;
 	switch (frame->format) {
+		case V4L2_PIX_FMT_YUV420:
+		case V4L2_PIX_FMT_YVU420:
+		case V4L2_PIX_FMT_GREY:
+			bytes_per_pixel = 1;
+			break;
+
 		case V4L2_PIX_FMT_YUYV:
 		case V4L2_PIX_FMT_YVYU:
 		case V4L2_PIX_FMT_UYVY:
-		case V4L2_PIX_FMT_RGB565: bytes_per_pixel = 2; break;
+		case V4L2_PIX_FMT_RGB565:
+			bytes_per_pixel = 2;
+			break;
+
 		case V4L2_PIX_FMT_BGR24:
-		case V4L2_PIX_FMT_RGB24: bytes_per_pixel = 3; break;
+		case V4L2_PIX_FMT_RGB24:
+			bytes_per_pixel = 3;
+			break;
+
 		// case V4L2_PIX_FMT_H264:
 		case V4L2_PIX_FMT_MJPEG:
-		case V4L2_PIX_FMT_JPEG: bytes_per_pixel = 0; break;
-		default: assert(0 && "Unknown format");
+		case V4L2_PIX_FMT_JPEG:
+			bytes_per_pixel = 0;
+			break;
+
+		default:
+			assert(0 && "Unknown format");
 	}
 	if (bytes_per_pixel > 0 && frame->stride > frame->width) {
 		return (frame->stride - frame->width * bytes_per_pixel);

src/libs/frametext.c

@@ -121,9 +121,16 @@ void us_frametext_draw(us_frametext_s *ft, const char *text, uint width, uint he
 	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) {
+
+	// Ширина текста должна быть от 75%, до половины экрана, в зависимости от длины
+	const float div_x = US_MAX(US_MIN((100 / block_width * 2), 2.0), 1.5);
+
+	// Высоту тоже отрегулировать как-нибудь
+	const float div_y = US_MAX(US_MIN((70 / block_height * 2), 2.0), 1.5);
+
+	uint scale_x = frame->width / block_width / div_x;
+	uint scale_y = frame->height / block_height / div_y;
+	if (scale_x < scale_y / 1.5) { // Keep proportions
 		scale_y = scale_x * 1.5;
 	} else if (scale_y < scale_x * 1.5) {
 		scale_x = scale_y / 1.5;

src/libs/process.h

@@ -25,14 +25,8 @@
 #include <signal.h>
 #include <unistd.h>
 
-
-#if defined(__linux__)
-#	define HAS_PDEATHSIG
-#elif defined(__FreeBSD__)
+#if defined(__FreeBSD__)
 #	include <sys/param.h>
-#	if __FreeBSD_version >= 1102000
-#		define HAS_PDEATHSIG
-#	endif
 #endif
 
 
@@ -49,20 +43,22 @@
 #		error setproctitle() not implemented, you can disable it using WITH_SETPROCTITLE=0
 #	endif
 #endif
-#ifdef HAS_PDEATHSIG
+
+#ifdef WITH_PDEATHSIG
 #	if defined(__linux__)
 #		include <sys/prctl.h>
-#	elif defined(__FreeBSD__)
+#	elif defined(__FreeBSD__) && (__FreeBSD_version >= 1102000)
 #		include <sys/procctl.h>
+#	else
+#		error WITH_PDEATHSIG is not supported on your system
 #	endif
 #endif
+
 #include "types.h"
 #ifdef WITH_SETPROCTITLE
 #	include "tools.h"
 #endif
-#ifdef HAS_PDEATHSIG
-#	include "logging.h"
-#endif
+#include "logging.h"
 
 
 #ifdef WITH_SETPROCTITLE
@@ -70,7 +66,7 @@ extern char **environ;
 #endif
 
 
-#ifdef HAS_PDEATHSIG
+#ifdef WITH_PDEATHSIG
 INLINE int us_process_track_parent_death(void) {
 	const pid_t parent = getppid();
 	int signum = SIGTERM;

src/libs/tc358743.c

@@ -33,17 +33,6 @@
 #include "xioctl.h"
 
 
-#ifndef V4L2_CID_USER_TC358743_BASE
-#	define V4L2_CID_USER_TC358743_BASE (V4L2_CID_USER_BASE + 0x1080)
-#endif
-#ifndef TC358743_CID_AUDIO_PRESENT
-#	define TC358743_CID_AUDIO_PRESENT (V4L2_CID_USER_TC358743_BASE + 1)
-#endif
-#ifndef TC358743_CID_AUDIO_SAMPLING_RATE
-#	define TC358743_CID_AUDIO_SAMPLING_RATE (V4L2_CID_USER_TC358743_BASE + 0)
-#endif
-
-
 int us_tc358743_xioctl_get_audio_hz(int fd, uint *audio_hz) {
 	*audio_hz = 0;
 

src/libs/tc358743.h

@@ -22,7 +22,26 @@
 
 #pragma once
 
+#include <linux/v4l2-controls.h>
+
 #include "types.h"
 
 
+#ifndef V4L2_CID_USER_TC358743_BASE
+#	define V4L2_CID_USER_TC358743_BASE (V4L2_CID_USER_BASE + 0x1080)
+#endif
+
+#ifndef TC358743_CID_AUDIO_SAMPLING_RATE
+#	define TC358743_CID_AUDIO_SAMPLING_RATE (V4L2_CID_USER_TC358743_BASE + 0)
+#endif
+
+#ifndef TC358743_CID_AUDIO_PRESENT
+#	define TC358743_CID_AUDIO_PRESENT (V4L2_CID_USER_TC358743_BASE + 1)
+#endif
+
+#ifndef TC358743_CID_LANES_ENOUGH
+#	define TC358743_CID_LANES_ENOUGH (V4L2_CID_USER_TC358743_BASE + 2)
+#endif
+
+
 int us_tc358743_xioctl_get_audio_hz(int fd, uint *audio_hz);

src/ustreamer/blank.c

@@ -36,7 +36,7 @@ us_blank_s *us_blank_init(void) {
 	blank->ft = us_frametext_init();
 	blank->raw = blank->ft->frame;
 	blank->jpeg = us_frame_init();
-	us_blank_draw(blank, "< NO SIGNAL >", 640, 480);
+	us_blank_draw(blank, "< NO LIVE VIDEO >", 640, 480);
 	return blank;
 }
 

src/ustreamer/encoder.c

@@ -131,7 +131,7 @@ void us_encoder_open(us_encoder_s *enc, us_capture_s *cap) {
 		} else {
 			US_LOG_INFO("Switching to CPU encoder: the input format is not (M)JPEG ...");
 			type = US_ENCODER_TYPE_CPU;
-			quality = cap->jpeg_quality;
+			quality = cap->jpeg_quality; // cppcheck-suppress redundantAssignment
 		}
 
 	} else if (type == US_ENCODER_TYPE_M2M_VIDEO || type == US_ENCODER_TYPE_M2M_IMAGE) {

src/ustreamer/encoders/cpu/encoder.c

@@ -38,6 +38,8 @@ typedef struct {
 static void _jpeg_set_dest_frame(j_compress_ptr jpeg, us_frame_s *frame);
 
 static void _jpeg_write_scanlines_yuv(struct jpeg_compress_struct *jpeg, const us_frame_s *frame);
+static void _jpeg_write_scanlines_yuv_planar(struct jpeg_compress_struct *jpeg, const us_frame_s *frame);
+static void _jpeg_write_scanlines_grey(struct jpeg_compress_struct *jpeg, const us_frame_s *frame);
 static void _jpeg_write_scanlines_rgb565(struct jpeg_compress_struct *jpeg, const us_frame_s *frame);
 static void _jpeg_write_scanlines_rgb24(struct jpeg_compress_struct *jpeg, const us_frame_s *frame);
 #ifndef JCS_EXTENSIONS
@@ -50,7 +52,7 @@ static boolean _jpeg_empty_output_buffer(j_compress_ptr jpeg);
 static void _jpeg_term_destination(j_compress_ptr jpeg);
 
 
-void us_cpu_encoder_compress(const us_frame_s *src, us_frame_s *dest, unsigned quality) {
+void us_cpu_encoder_compress(const us_frame_s *src, us_frame_s *dest, uint quality) {
 	// This function based on compress_image_to_jpeg() from mjpg-streamer
 
 	us_frame_encoding_begin(src, dest, V4L2_PIX_FMT_JPEG);
@@ -69,11 +71,23 @@ void us_cpu_encoder_compress(const us_frame_s *src, us_frame_s *dest, unsigned q
 	switch (src->format) {
 		case V4L2_PIX_FMT_YUYV:
 		case V4L2_PIX_FMT_YVYU:
-		case V4L2_PIX_FMT_UYVY: jpeg.in_color_space = JCS_YCbCr; break;
+		case V4L2_PIX_FMT_UYVY:
+		case V4L2_PIX_FMT_YUV420:
+		case V4L2_PIX_FMT_YVU420:
+			jpeg.in_color_space = JCS_YCbCr;
+			break;
+		case V4L2_PIX_FMT_GREY:
+			jpeg.input_components = 1;
+			jpeg.in_color_space = JCS_GRAYSCALE;
+			break;
 #		ifdef JCS_EXTENSIONS
-		case V4L2_PIX_FMT_BGR24: jpeg.in_color_space = JCS_EXT_BGR; break;
+		case V4L2_PIX_FMT_BGR24:
+			jpeg.in_color_space = JCS_EXT_BGR;
+			break;
 #		endif
-		default: jpeg.in_color_space = JCS_RGB; break;
+		default:
+			jpeg.in_color_space = JCS_RGB;
+			break;
 	}
 
 	jpeg_set_defaults(&jpeg);
@@ -85,9 +99,27 @@ void us_cpu_encoder_compress(const us_frame_s *src, us_frame_s *dest, unsigned q
 		// https://www.fourcc.org/yuv.php
 		case V4L2_PIX_FMT_YUYV:
 		case V4L2_PIX_FMT_YVYU:
-		case V4L2_PIX_FMT_UYVY:		_jpeg_write_scanlines_yuv(&jpeg, src); break;
-		case V4L2_PIX_FMT_RGB565:	_jpeg_write_scanlines_rgb565(&jpeg, src); break;
-		case V4L2_PIX_FMT_RGB24:	_jpeg_write_scanlines_rgb24(&jpeg, src); break;
+		case V4L2_PIX_FMT_UYVY:
+			_jpeg_write_scanlines_yuv(&jpeg, src);
+			break;
+
+		case V4L2_PIX_FMT_YUV420:
+		case V4L2_PIX_FMT_YVU420:
+			_jpeg_write_scanlines_yuv_planar(&jpeg, src);
+			break;
+		
+		case V4L2_PIX_FMT_GREY:
+			_jpeg_write_scanlines_grey(&jpeg, src);
+			break;
+
+		case V4L2_PIX_FMT_RGB565:
+			_jpeg_write_scanlines_rgb565(&jpeg, src);
+			break;
+
+		case V4L2_PIX_FMT_RGB24:
+			_jpeg_write_scanlines_rgb24(&jpeg, src);
+			break;
+
 		case V4L2_PIX_FMT_BGR24:
 #			ifdef JCS_EXTENSIONS
 			_jpeg_write_scanlines_rgb24(&jpeg, src); // Use native JCS_EXT_BGR
@@ -121,19 +153,19 @@ static void _jpeg_set_dest_frame(j_compress_ptr jpeg, us_frame_s *frame) {
 }
 
 static void _jpeg_write_scanlines_yuv(struct jpeg_compress_struct *jpeg, const us_frame_s *frame) {
-	uint8_t *line_buf;
+	u8 *line_buf;
 	US_CALLOC(line_buf, frame->width * 3);
 
-	const unsigned padding = us_frame_get_padding(frame);
-	const uint8_t *data = frame->data;
+	const uint padding = us_frame_get_padding(frame);
+	const u8 *data = frame->data;
 
 	while (jpeg->next_scanline < frame->height) {
-		uint8_t *ptr = line_buf;
+		u8 *ptr = line_buf;
 
-		for (unsigned x = 0; x < frame->width; ++x) {
+		for (uint x = 0; x < frame->width; ++x) {
 			// See also: https://www.kernel.org/doc/html/v4.8/media/uapi/v4l/pixfmt-uyvy.html
 			const bool is_odd_pixel = x & 1;
-			uint8_t y, u, v;
+			u8 y, u, v;
 			if (frame->format == V4L2_PIX_FMT_YUYV) {
 				y = data[is_odd_pixel ? 2 : 0];
 				u = data[1];
@@ -167,21 +199,104 @@ static void _jpeg_write_scanlines_yuv(struct jpeg_compress_struct *jpeg, const u
 	free(line_buf);
 }
 
-static void _jpeg_write_scanlines_rgb565(struct jpeg_compress_struct *jpeg, const us_frame_s *frame) {
-	uint8_t *line_buf;
+static void _jpeg_write_scanlines_yuv_planar(struct jpeg_compress_struct *jpeg, const us_frame_s *frame) {
+	u8 *line_buf;
 	US_CALLOC(line_buf, frame->width * 3);
 
-	const unsigned padding = us_frame_get_padding(frame);
-	const uint8_t *data = frame->data;
+	const uint padding = us_frame_get_padding(frame);
+	const uint image_size = frame->width * frame->height;
+	const uint chroma_array_size = (frame->used - image_size) / 2;
+	const uint chroma_matrix_order = (image_size / chroma_array_size) == 16 ? 4 : 2;
+	const u8 *data = frame->data;
+	const u8 *chroma1_data = frame->data + image_size;
+	const u8 *chroma2_data = frame->data + image_size + chroma_array_size;
+
+	//US_LOG_DEBUG("Planar data: Image Size %u, Chroma Array Size %u, Chroma Matrix Order %u",
+	//	image_size, chroma_array_size, chroma_matrix_order);
 
 	while (jpeg->next_scanline < frame->height) {
-		uint8_t *ptr = line_buf;
+		u8 *ptr = line_buf;
 
-		for (unsigned x = 0; x < frame->width; ++x) {
-			const unsigned int two_byte = (data[1] << 8) + data[0];
+		for (uint x = 0; x < frame->width; ++x) {
+			// See also: https://www.kernel.org/doc/html/v4.8/media/uapi/v4l/pixfmt-yuv420.html
+			u8 y = data[x];
+			u8 u;
+			u8 v;
+			uint chroma_position = x / chroma_matrix_order;
+
+			switch (frame->format) {
+				case V4L2_PIX_FMT_YUV420:
+					u = chroma1_data[chroma_position];
+					v = chroma2_data[chroma_position];
+					break;
+				case V4L2_PIX_FMT_YVU420:
+					u = chroma2_data[chroma_position];
+					v = chroma1_data[chroma_position];
+					break;
+				default:
+					assert(0 && "Unsupported pixel format");
+					return; // Makes linter happy
+			}
+
+			ptr[0] = y;
+			ptr[1] = u;
+			ptr[2] = v;
+			ptr += 3;
+		}
+
+		data += frame->width + padding;
+
+		if (jpeg->next_scanline > 0 && jpeg->next_scanline % chroma_matrix_order == 0) {
+			chroma1_data += (frame->width + padding) / chroma_matrix_order;
+			chroma2_data += (frame->width + padding) / chroma_matrix_order;
+		}
+
+		JSAMPROW scanlines[1] = {line_buf};
+		jpeg_write_scanlines(jpeg, scanlines, 1);
+	}
+
+	free(line_buf);
+}
+
+static void _jpeg_write_scanlines_grey(struct jpeg_compress_struct *jpeg, const us_frame_s *frame) {
+	u8 *line_buf;
+	US_CALLOC(line_buf, frame->width);
+
+	const uint padding = us_frame_get_padding(frame);
+	const u8 *data = frame->data;
+
+	while (jpeg->next_scanline < frame->height) {
+		u8 *ptr = line_buf;
+
+		for (uint x = 0; x < frame->width; ++x) {
+			ptr[0] = data[x];
+			ptr += 1;
+		}
+
+		data += frame->width + padding;
+
+		JSAMPROW scanlines[1] = {line_buf};
+		jpeg_write_scanlines(jpeg, scanlines, 1);
+	}
+
+	free(line_buf);
+}
+
+static void _jpeg_write_scanlines_rgb565(struct jpeg_compress_struct *jpeg, const us_frame_s *frame) {
+	u8 *line_buf;
+	US_CALLOC(line_buf, frame->width * 3);
+
+	const uint padding = us_frame_get_padding(frame);
+	const u8 *data = frame->data;
+
+	while (jpeg->next_scanline < frame->height) {
+		u8 *ptr = line_buf;
+
+		for (uint x = 0; x < frame->width; ++x) {
+			const uint two_byte = (data[1] << 8) + data[0];
 
 			ptr[0] = data[1] & 248; // Red
-			ptr[1] = (uint8_t)((two_byte & 2016) >> 3); // Green
+			ptr[1] = (u8)((two_byte & 2016) >> 3); // Green
 			ptr[2] = (data[0] & 31) * 8; // Blue
 			ptr += 3;
 
@@ -197,8 +312,8 @@ static void _jpeg_write_scanlines_rgb565(struct jpeg_compress_struct *jpeg, cons
 }
 
 static void _jpeg_write_scanlines_rgb24(struct jpeg_compress_struct *jpeg, const us_frame_s *frame) {
-	const unsigned padding = us_frame_get_padding(frame);
-	uint8_t *data = frame->data;
+	const uint padding = us_frame_get_padding(frame);
+	u8 *data = frame->data;
 
 	while (jpeg->next_scanline < frame->height) {
 		JSAMPROW scanlines[1] = {data};
@@ -210,17 +325,17 @@ static void _jpeg_write_scanlines_rgb24(struct jpeg_compress_struct *jpeg, const
 
 #ifndef JCS_EXTENSIONS
 static void _jpeg_write_scanlines_bgr24(struct jpeg_compress_struct *jpeg, const us_frame_s *frame) {
-	uint8_t *line_buf;
+	u8 *line_buf;
 	US_CALLOC(line_buf, frame->width * 3);
 
-	const unsigned padding = us_frame_get_padding(frame);
-	uint8_t *data = frame->data;
+	const uint padding = us_frame_get_padding(frame);
+	u8 *data = frame->data;
 
 	while (jpeg->next_scanline < frame->height) {
-		uint8_t *ptr = line_buf;
+		u8 *ptr = line_buf;
 
 		// swap B and R values
-		for (unsigned x = 0; x < frame->width * 3; x += 3) {
+		for (uint x = 0; x < frame->width * 3; x += 3) {
 			ptr[0] = data[x + 2];
 			ptr[1] = data[x + 1];
 			ptr[2] = data[x];

src/ustreamer/encoders/cpu/encoder.h

@@ -35,4 +35,4 @@
 #include "../../../libs/frame.h"
 
 
-void us_cpu_encoder_compress(const us_frame_s *src, us_frame_s *dest, unsigned quality);
+void us_cpu_encoder_compress(const us_frame_s *src, us_frame_s *dest, uint quality);

src/ustreamer/http/server.c

@@ -880,7 +880,7 @@ static void _http_send_snapshot(us_server_s *server) {
 			if (!captured_meta.online) {
 				if (blank == NULL) {
 					blank = us_blank_init();
-					us_blank_draw(blank, "< NO SIGNAL >", captured_meta.width, captured_meta.height);
+					us_blank_draw(blank, "< NO LIVE VIDEO >", captured_meta.width, captured_meta.height);
 				}
 				frame = blank->jpeg;
 			}

src/ustreamer/options.c

@@ -114,9 +114,10 @@ enum _US_OPT_VALUES {
 	_O_GPIO_HAS_HTTP_CLIENTS,
 #	endif
 
-#	ifdef HAS_PDEATHSIG
+#	ifdef WITH_PDEATHSIG
 	_O_EXIT_ON_PARENT_DEATH,
 #	endif
+	_O_EXIT_ON_DEVICE_ERROR,
 	_O_EXIT_ON_NO_CLIENTS,
 #	ifdef WITH_SETPROCTITLE
 	_O_PROCESS_NAME_PREFIX,
@@ -138,7 +139,7 @@ static const struct option _LONG_OPTS[] = {
 	{"input",					required_argument,	NULL,	_O_INPUT},
 	{"resolution",				required_argument,	NULL,	_O_RESOLUTION},
 	{"format",					required_argument,	NULL,	_O_FORMAT},
-	{"format-swap-rgb",			required_argument,	NULL,	_O_FORMAT_SWAP_RGB},
+	{"format-swap-rgb",			no_argument,		NULL,	_O_FORMAT_SWAP_RGB},
 	{"tv-standard",				required_argument,	NULL,	_O_TV_STANDARD},
 	{"io-method",				required_argument,	NULL,	_O_IO_METHOD},
 	{"desired-fps",				required_argument,	NULL,	_O_DESIRED_FPS},
@@ -224,9 +225,10 @@ static const struct option _LONG_OPTS[] = {
 	{"gpio-has-http-clients",	required_argument,	NULL,	_O_GPIO_HAS_HTTP_CLIENTS},
 #	endif
 
-#	ifdef HAS_PDEATHSIG
+#	ifdef WITH_PDEATHSIG
 	{"exit-on-parent-death",	no_argument,		NULL,	_O_EXIT_ON_PARENT_DEATH},
 #	endif
+	{"exit-on-device-error",	no_argument,		NULL,	_O_EXIT_ON_DEVICE_ERROR},
 	{"exit-on-no-clients",		required_argument,	NULL,	_O_EXIT_ON_NO_CLIENTS},
 #	ifdef WITH_SETPROCTITLE
 	{"process-name-prefix",		required_argument,	NULL,	_O_PROCESS_NAME_PREFIX},
@@ -483,13 +485,14 @@ int options_parse(us_options_s *options, us_capture_s *cap, us_encoder_s *enc, u
 			case _O_GPIO_HAS_HTTP_CLIENTS:	OPT_NUMBER("--gpio-has-http-clients", us_g_gpio.has_http_clients.pin, 0, 256, 0);
 #			endif
 
-#			ifdef HAS_PDEATHSIG
+#			ifdef WITH_PDEATHSIG
 			case _O_EXIT_ON_PARENT_DEATH:
 				if (us_process_track_parent_death() < 0) {
 					return -1;
 				};
 				break;
 #			endif
+			case _O_EXIT_ON_DEVICE_ERROR:	OPT_SET(stream->exit_on_device_error, true);
 			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);
@@ -581,34 +584,52 @@ static int _check_instance_id(const char *str) {
 }
 
 static void _features(void) {
-#	ifdef WITH_GPIO
+#	ifdef MK_WITH_PYTHON
+	puts("+ WITH_PYTHON");
+#	else
+	puts("- WITH_PYTHON");
+#	endif
+
+#	ifdef MK_WITH_JANUS
+	puts("+ WITH_JANUS");
+#	else
+	puts("- WITH_JANUS");
+#	endif
+
+#	ifdef MK_WITH_V4P
+	puts("+ WITH_V4P");
+#	else
+	puts("- WITH_V4P");
+#	endif
+
+#	ifdef MK_WITH_GPIO
 	puts("+ WITH_GPIO");
 #	else
 	puts("- WITH_GPIO");
 #	endif
 
-#	ifdef WITH_SYSTEMD
+#	ifdef MK_WITH_SYSTEMD
 	puts("+ WITH_SYSTEMD");
 #	else
 	puts("- WITH_SYSTEMD");
 #	endif
 
-#	ifdef WITH_PTHREAD_NP
+#	ifdef MK_WITH_PTHREAD_NP
 	puts("+ WITH_PTHREAD_NP");
 #	else
 	puts("- WITH_PTHREAD_NP");
 #	endif
 
-#	ifdef WITH_SETPROCTITLE
+#	ifdef MK_WITH_SETPROCTITLE
 	puts("+ WITH_SETPROCTITLE");
 #	else
 	puts("- WITH_SETPROCTITLE");
 #	endif
 
-#	ifdef HAS_PDEATHSIG
-	puts("+ HAS_PDEATHSIG");
+#	ifdef MK_WITH_PDEATHSIG
+	puts("+ WITH_PDEATHSIG");
 #	else
-	puts("- HAS_PDEATHSIG");
+	puts("- WITH_PDEATHSIG");
 #	endif
 }
 
@@ -740,11 +761,11 @@ static void _help(FILE *fp, const us_capture_s *cap, const us_encoder_s *enc, co
 	SAY("    --gpio-stream-online <pin>  ──── Set 1 while streaming. Default: disabled.\n");
 	SAY("    --gpio-has-http-clients <pin>  ─ Set 1 while stream has at least one client. Default: disabled.\n");
 #	endif
-#	if (defined(HAS_PDEATHSIG) || defined(WITH_SETPROCTITLE))
+#	if (defined(WITH_PDEATHSIG) || defined(WITH_SETPROCTITLE))
 	SAY("Process options:");
 	SAY("════════════════");
 #	endif
-#	ifdef HAS_PDEATHSIG
+#	ifdef WITH_PDEATHSIG
 	SAY("    --exit-on-parent-death  ─────── Exit the program if the parent process is dead. Default: disabled.\n");
 #	endif
 	SAY("    --exit-on-no-clients <sec> ──── Exit the program if there have been no stream or sink clients");

src/ustreamer/stream.c

@@ -129,7 +129,7 @@ us_stream_s *us_stream_init(us_capture_s *cap, us_encoder_s *enc) {
 
 void us_stream_update_blank(us_stream_s *stream, const us_capture_s *cap) {
 	us_stream_runtime_s *const run = stream->run;
-	us_blank_draw(run->blank, "< NO SIGNAL >", cap->width, cap->height);
+	us_blank_draw(run->blank, "< NO LIVE VIDEO >", cap->width, cap->height);
 	us_fpsi_frame_to_meta(run->blank->raw, &run->notify_meta); // Initial "unchanged" meta
 	_stream_update_captured_fpsi(stream, run->blank->raw, false);
 }
@@ -529,6 +529,8 @@ static int _stream_init_loop(us_stream_s *stream) {
 
 	int once = 0;
 	while (!atomic_load(&stream->run->stop)) {
+		const char *blank_reason = "< NO LIVE VIDEO >";
+
 #		ifdef WITH_GPIO
 		us_gpio_set_stream_online(false);
 #		endif
@@ -554,17 +556,68 @@ static int _stream_init_loop(us_stream_s *stream) {
 		switch (us_capture_open(stream->cap)) {
 			case 0: break;
 			case US_ERROR_NO_DEVICE:
-			case US_ERROR_NO_DATA:
-				US_ONCE({ US_LOG_INFO("Waiting for the capture device ..."); });
-				goto offline_and_retry;
+				blank_reason = (
+					"< NO CAPTURE DEVICE >\n \n"
+					"  Possible reasons:  \n \n"
+					"  - Device unplugged \n \n"
+					"  - Bad config       \n \n"
+					"  - Malfunction      "
+				);
+				goto silent_error;
+			case US_ERROR_NO_CABLE:
+				blank_reason = (
+					"< NO VIDEO SOURCE >\n \n"
+					" Possible reasons: \n \n"
+					" - Source is off   \n \n"
+					" - Cable problems  "
+				);
+				goto silent_error;
+			case US_ERROR_NO_SIGNAL:
+				blank_reason = (
+					"< NO SIGNAL DETECTED >\n \n"
+					"   Possible reasons:  \n \n"
+                    "   - Video suspended  \n \n"
+					"   - Cable problems   "
+				);
+				goto silent_error;
+			case US_ERROR_NO_SYNC:
+				blank_reason = (
+					"< NO SYNC WITH SIGNAL >\n \n"
+					"   Possible reasons:   \n \n"
+					"   - Source is crazy   \n \n"
+					"   - Cable problems    "
+				);
+				goto silent_error;
+			case US_ERROR_NO_LANES:
+				blank_reason = (
+					"< UNSUPPORTED SIGNAL TIMINGS >\n \n"
+					"      Possible reasons:       \n \n"
+					"    - Too high frequency      \n \n"
+					"    - Source ignores EDID     \n \n"
+					"    - Invalid EDID            "
+				);
+				goto verbose_error;
 			default:
-				once = 0;
-				goto offline_and_retry;
+				goto verbose_error;
 		}
 		us_encoder_open(stream->enc, stream->cap);
 		return 0;
 
+	silent_error:
+		if (!stream->exit_on_device_error) {
+			US_ONCE({ US_LOG_INFO("Waiting for the capture device ..."); });
+		}
+		goto offline_and_retry;
+
+	verbose_error:
+		once = 0;
+		goto offline_and_retry;
+
 	offline_and_retry:
+		if (stream->exit_on_device_error) {
+			US_LOG_INFO("Device error, exiting ...");
+			us_process_suicide();
+		}
 		for (uint count = 0; count < stream->error_delay * 10; ++count) {
 			if (atomic_load(&run->stop)) {
 				break;
@@ -577,7 +630,7 @@ static int _stream_init_loop(us_stream_s *stream) {
 					width = stream->cap->width;
 					height = stream->cap->height;
 				}
-				us_blank_draw(run->blank, "< NO SIGNAL >", width, height);
+				us_blank_draw(run->blank, blank_reason, width, height);
 
 				_stream_update_captured_fpsi(stream, run->blank->raw, false);
 				_stream_expose_jpeg(stream, run->blank->jpeg);
@@ -601,7 +654,7 @@ static void _stream_update_captured_fpsi(us_stream_s *stream, const us_frame_s *
 	us_fpsi_frame_to_meta(frame, &meta);
 	us_fpsi_update(run->http->captured_fpsi, bump, &meta);
 
-	if (stream->notify_parent && !memcmp(&run->notify_meta, &meta, sizeof(us_fpsi_meta_s))) {
+	if (stream->notify_parent && memcmp(&run->notify_meta, &meta, sizeof(us_fpsi_meta_s))) {
 		memcpy(&run->notify_meta, &meta, sizeof(us_fpsi_meta_s));
 		us_process_notify_parent();
 	}

src/ustreamer/stream.h

@@ -80,6 +80,7 @@ typedef struct {
 	bool			notify_parent;
 	bool			slowdown;
 	uint			error_delay;
+	bool			exit_on_device_error;
 	uint			exit_on_no_clients;
 
 	us_memsink_s	*jpeg_sink;

src/v4p/main.c

@@ -242,7 +242,7 @@ static void _main_loop(void) {
 	us_drm_destroy(drm);
 }
 
-static void *_follower_thread(void *v_unix_follow) {
+static void *_follower_thread(void *v_unix_follow) { // cppcheck-suppress constParameterCallback
 	US_THREAD_SETTLE("follower");
 	const char *path = v_unix_follow;
 	assert(path != NULL);