Bump version: 1.18 → 1.19

Add note about uStreamer Ansible role

.bumpversion.cfg

@@ -1,7 +1,7 @@
 [bumpversion]
 commit = True
 tag = True
-current_version = 1.16
+current_version = 1.19
 parse = (?P<major>\d+)\.(?P<minor>\d+)(\.(?P<patch>\d+)(\-(?P<release>[a-z]+))?)?
 serialize = 
 	{major}.{minor}
@@ -17,4 +17,3 @@ replace = pkgver={new_version}
 [bumpversion:file:pkg/openwrt/Makefile]
 search = PKG_VERSION:={current_version}
 replace = PKG_VERSION:={new_version}
-

.github/FUNDING.yml

@@ -0,0 +1,4 @@
+# These are supported funding model platforms
+
+patreon: pikvm
+custom: https://www.paypal.me/mdevaev

README.md

@@ -36,7 +36,7 @@ If you're going to live-stream from your backyard webcam and need to control it,
 You'll need  ```make```, ```gcc```, ```libevent``` with ```pthreads``` support, ```libjpeg8```/```libjpeg-turbo```, ```libuuid``` and ```libbsd``` (only for Linux).
 
 * Arch: `sudo pacman -S libevent libjpeg-turbo libutil-linux libbsd`.
-* Raspbian: `sudo apt install libevent-dev libevent-pthreads-2.1-6-dev libjpeg8-dev uuid-dev libbsd-dev`.
+* Raspbian: `sudo apt install libevent-dev libjpeg8-dev uuid-dev libbsd-dev`.
 * Debian: `sudo apt install build-essential libevent-dev libjpeg62-turbo-dev uuid-dev libbsd-dev`.
 
 On Raspberry Pi you can build the program with OpenMAX IL. To do this pass option ```WITH_OMX=1``` to ```make```. To enable GPIO support install [wiringPi](http://wiringpi.com) and pass option ```WITH_GPIO=1```. If the compiler reports about a missing function ```pthread_get_name_np()``` (or similar), add option ```WITH_PTHREAD_NP=0``` (it's enabled by default). For the similar error with ```setproctitle()``` add option ```WITH_SETPROCTITLE=0```.
@@ -72,8 +72,9 @@ $ ./ustreamer \
 You can always view the full list of options with ```ustreamer --help```.
 
 -----
-# Tips
-* [Running uStreamer via systemd service](https://github.com/pikvm/ustreamer/issues/16)
+# See also
+* [Running uStreamer via systemd service](https://github.com/pikvm/ustreamer/issues/16).
+* [uStreamer Ansible Role](https://github.com/mtlynch/ansible-role-ustreamer): Use [Ansible](https://docs.ansible.com/ansible/latest/index.html) to compile uStreamer and install it as a systemd service automatically.
 
 -----
 # License

README.ru.md

@@ -36,7 +36,7 @@
 Для сборки вам понадобятся ```make```, ```gcc```, ```libevent``` с поддержкой ```pthreads```, ```libjpeg8```/```libjpeg-turbo```, ```libuuid``` и ```libbsd``` (только для Linux).
 
 * Arch: `sudo pacman -S libevent libjpeg-turbo libutil-linux libbsd`.
-* Raspbian: `sudo apt install libevent-dev libevent-pthreads-2.1-6-dev libjpeg8-dev uuid-dev libbsd-dev`.
+* Raspbian: `sudo apt install libevent-dev libjpeg8-dev uuid-dev libbsd-dev`.
 * Debian: `sudo apt install build-essential libevent-dev libjpeg62-turbo-dev uuid-dev libbsd-dev`.
 
 На Raspberry Pi программу можно собрать с поддержкой OpenMAX IL. Для этого передайте ```make``` параметр ```WITH_OMX=1```. Для включения сборки с поддержкой GPIO установите [wiringPi](http://wiringpi.com) и добавьте параметр ```WITH_GPIO=1```. Если при сборке компилятор ругается на отсутствие функции ```pthread_get_name_np()``` или другой подобной, добавьте параметр ```WITH_PTHREAD_NP=0``` (по умолчанию он включен). При аналогичной ошибке с функцией ```setproctitle()``` добавьте параметр ```WITH_SETPROCTITLE=0```.
@@ -72,8 +72,9 @@ $ ./ustreamer \
 За полным списком опций обращайтесь ко встроенной справке: ```ustreamer --help```.
 
 -----
-# Советы
-* [Запуск с помощью systemd-сервиса](https://github.com/pikvm/ustreamer/issues/16)
+# Смотрите также
+* [Запуск с помощью systemd-сервиса](https://github.com/pikvm/ustreamer/issues/16).
+* [uStreamer Ansible Role](https://github.com/mtlynch/ansible-role-ustreamer): Использование [Ansible](https://docs.ansible.com/ansible/latest/index.html) для сборки и установки стримера как systemd-сервиса.
 
 -----
 # Лицензия

linters/tox.ini

@@ -23,9 +23,7 @@ commands = cppcheck \
 [testenv:flake8]
 whitelist_externals = bash
 commands = bash -c 'flake8 --config=linters/flake8.ini tools/*.py'
-# FIXME: pyflakes from master to support walrus
 deps =
-	git+https://github.com/PyCQA/pyflakes@1911c20#egg=pyflakes
 	flake8
 	flake8-quotes
 

pkg/arch/PKGBUILD

@@ -3,7 +3,7 @@
 
 
 pkgname=ustreamer
-pkgver=1.16
+pkgver=1.19
 pkgrel=1
 pkgdesc="Lightweight and fast MJPG-HTTP streamer"
 url="https://github.com/pikvm/ustreamer"

pkg/openwrt/Makefile

@@ -6,7 +6,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=ustreamer
-PKG_VERSION:=1.16
+PKG_VERSION:=1.19
 PKG_RELEASE:=1
 PKG_MAINTAINER:=Maxim Devaev <mdevaev@gmail.com>
 

src/config.h

@@ -23,5 +23,5 @@
 #pragma once
 
 #ifndef VERSION
-#	define VERSION "1.16"
+#	define VERSION "1.19"
 #endif

src/device.c

@@ -67,13 +67,23 @@ static const struct {
 	{"JPEG",	V4L2_PIX_FMT_JPEG},
 };
 
+static const struct {
+	const char *name;
+	const enum v4l2_memory io_method;
+} _IO_METHODS[] = {
+	{"MMAP",	V4L2_MEMORY_MMAP},
+	{"USERPTR",	V4L2_MEMORY_USERPTR},
+};
+
 
 static int _device_open_check_cap(struct device_t *dev);
 static int _device_open_dv_timings(struct device_t *dev);
 static int _device_apply_dv_timings(struct device_t *dev);
 static int _device_open_format(struct device_t *dev);
 static void _device_open_hw_fps(struct device_t *dev);
-static int _device_open_mmap(struct device_t *dev);
+static int _device_open_io_method(struct device_t *dev);
+static int _device_open_io_method_mmap(struct device_t *dev);
+static int _device_open_io_method_userptr(struct device_t *dev);
 static int _device_open_queue_buffers(struct device_t *dev);
 static void _device_open_alloc_picbufs(struct device_t *dev);
 static int _device_apply_resolution(struct device_t *dev, unsigned width, unsigned height);
@@ -86,6 +96,7 @@ static const char *_format_to_string_fourcc(char *buf, size_t size, unsigned for
 static const char *_format_to_string_nullable(unsigned format);
 static const char *_format_to_string_supported(unsigned format);
 static const char *_standard_to_string(v4l2_std_id standard);
+static const char *_io_method_to_string_supported(enum v4l2_memory io_method);
 
 
 struct device_t *device_init(void) {
@@ -111,6 +122,7 @@ struct device_t *device_init(void) {
 	dev->n_workers = min_u(cores_available, dev->n_buffers);
 	dev->timeout = 1;
 	dev->error_delay = 1;
+	dev->io_method = V4L2_MEMORY_MMAP;
 	dev->run = run;
 	return dev;
 }
@@ -138,6 +150,15 @@ v4l2_std_id device_parse_standard(const char *str) {
 	return STANDARD_UNKNOWN;
 }
 
+int device_parse_io_method(const char *str) {
+	for (unsigned index = 0; index < ARRAY_LEN(_IO_METHODS); ++index) {
+		if (!strcasecmp(str, _IO_METHODS[index].name)) {
+			return _IO_METHODS[index].io_method;
+		}
+	}
+	return IO_METHOD_UNKNOWN;
+}
+
 int device_open(struct device_t *dev) {
 	if ((dev->run->fd = open(dev->path, O_RDWR|O_NONBLOCK)) < 0) {
 		LOG_PERROR("Can't open device");
@@ -155,7 +176,7 @@ int device_open(struct device_t *dev) {
 		goto error;
 	}
 	_device_open_hw_fps(dev);
-	if (_device_open_mmap(dev) < 0) {
+	if (_device_open_io_method(dev) < 0) {
 		goto error;
 	}
 	if (_device_open_queue_buffers(dev) < 0) {
@@ -187,13 +208,19 @@ void device_close(struct device_t *dev) {
 	}
 
 	if (dev->run->hw_buffers) {
-		LOG_DEBUG("Unmapping HW buffers ...");
+		LOG_DEBUG("Releasing HW buffers ...");
 		for (unsigned index = 0; index < dev->run->n_buffers; ++index) {
 #			define HW_BUFFER(_next) dev->run->hw_buffers[index]._next
 
-			if (HW_BUFFER(allocated) > 0 && HW_BUFFER(data) != MAP_FAILED) {
-				if (munmap(HW_BUFFER(data), HW_BUFFER(allocated)) < 0) {
-					LOG_PERROR("Can't unmap device buffer %u", index);
+			if (dev->io_method == V4L2_MEMORY_MMAP) {
+				if (HW_BUFFER(allocated) > 0 && HW_BUFFER(data) != MAP_FAILED) {
+					if (munmap(HW_BUFFER(data), HW_BUFFER(allocated)) < 0) {
+						LOG_PERROR("Can't unmap device buffer %u", index);
+					}
+				}
+			} else { // V4L2_MEMORY_USERPTR
+				if (HW_BUFFER(data)) {
+					free(HW_BUFFER(data));
 				}
 			}
 
@@ -271,7 +298,7 @@ int device_grab_buffer(struct device_t *dev) {
 
 	MEMSET_ZERO(buf_info);
 	buf_info.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-	buf_info.memory = V4L2_MEMORY_MMAP;
+	buf_info.memory = dev->io_method;
 
 	LOG_DEBUG("Calling ioctl(VIDIOC_DQBUF) ...");
 	if (xioctl(dev->run->fd, VIDIOC_DQBUF, &buf_info) < 0) {
@@ -465,6 +492,8 @@ static int _device_open_format(struct device_t *dev) {
 
 	dev->run->format = fmt.fmt.pix.pixelformat;
 	LOG_INFO("Using pixelformat: %s", _format_to_string_supported(dev->run->format));
+
+	dev->run->raw_size = fmt.fmt.pix.sizeimage; // Only for userptr
 	return 0;
 }
 
@@ -510,7 +539,17 @@ static void _device_open_hw_fps(struct device_t *dev) {
 #	undef SETFPS_TPF
 }
 
-static int _device_open_mmap(struct device_t *dev) {
+static int _device_open_io_method(struct device_t *dev) {
+	LOG_INFO("Using IO method: %s", _io_method_to_string_supported(dev->io_method));
+	switch (dev->io_method) {
+		case V4L2_MEMORY_MMAP: return _device_open_io_method_mmap(dev);
+		case V4L2_MEMORY_USERPTR: return _device_open_io_method_userptr(dev);
+		default: assert(0 && "Unsupported IO method");
+	}
+	return -1;
+}
+
+static int _device_open_io_method_mmap(struct device_t *dev) {
 	struct v4l2_requestbuffers req;
 
 	MEMSET_ZERO(req);
@@ -518,9 +557,9 @@ static int _device_open_mmap(struct device_t *dev) {
 	req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 	req.memory = V4L2_MEMORY_MMAP;
 
-	LOG_DEBUG("Calling ioctl(VIDIOC_REQBUFS) ...");
+	LOG_DEBUG("Calling ioctl(VIDIOC_REQBUFS) for V4L2_MEMORY_MMAP ...");
 	if (xioctl(dev->run->fd, VIDIOC_REQBUFS, &req) < 0) {
-		LOG_PERROR("Device '%s' doesn't support memory mapping", dev->path);
+		LOG_PERROR("Device '%s' doesn't support V4L2_MEMORY_MMAP", dev->path);
 		return -1;
 	}
 
@@ -563,14 +602,56 @@ static int _device_open_mmap(struct device_t *dev) {
 	return 0;
 }
 
+static int _device_open_io_method_userptr(struct device_t *dev) {
+	struct v4l2_requestbuffers req;
+	unsigned page_size = getpagesize();
+	unsigned buf_size = align_size(dev->run->raw_size, page_size);
+
+	MEMSET_ZERO(req);
+	req.count = dev->n_buffers;
+	req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	req.memory = V4L2_MEMORY_USERPTR;
+
+	LOG_DEBUG("Calling ioctl(VIDIOC_REQBUFS) for V4L2_MEMORY_USERPTR ...");
+	if (xioctl(dev->run->fd, VIDIOC_REQBUFS, &req) < 0) {
+		LOG_PERROR("Device '%s' doesn't support V4L2_MEMORY_USERPTR", dev->path);
+		return -1;
+	}
+
+	if (req.count < 1) {
+		LOG_ERROR("Insufficient buffer memory: %u", req.count);
+		return -1;
+	} else {
+		LOG_INFO("Requested %u HW buffers, got %u", dev->n_buffers, req.count);
+	}
+
+	LOG_DEBUG("Allocating HW buffers ...");
+
+	A_CALLOC(dev->run->hw_buffers, req.count);
+	for (dev->run->n_buffers = 0; dev->run->n_buffers < req.count; ++dev->run->n_buffers) {
+#       define HW_BUFFER(_next) dev->run->hw_buffers[dev->run->n_buffers]._next
+
+		assert(HW_BUFFER(data) = aligned_alloc(page_size, buf_size));
+		memset(HW_BUFFER(data), 0, buf_size);
+		HW_BUFFER(allocated) = buf_size;
+
+#		undef HW_BUFFER
+	}
+	return 0;
+}
+
 static int _device_open_queue_buffers(struct device_t *dev) {
 	for (unsigned index = 0; index < dev->run->n_buffers; ++index) {
 		struct v4l2_buffer buf_info;
 
 		MEMSET_ZERO(buf_info);
 		buf_info.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-		buf_info.memory = V4L2_MEMORY_MMAP;
+		buf_info.memory = dev->io_method;
 		buf_info.index = index;
+		if (dev->io_method == V4L2_MEMORY_USERPTR) {
+			buf_info.m.userptr = (unsigned long)dev->run->hw_buffers[index].data;
+			buf_info.length = dev->run->hw_buffers[index].allocated;
+		}
 
 		LOG_DEBUG("Calling ioctl(VIDIOC_QBUF) for buffer %u ...", index);
 		if (xioctl(dev->run->fd, VIDIOC_QBUF, &buf_info) < 0) {
@@ -739,3 +820,12 @@ static const char *_standard_to_string(v4l2_std_id standard) {
 	}
 	return _STANDARDS[0].name;
 }
+
+static const char *_io_method_to_string_supported(enum v4l2_memory io_method) {
+	for (unsigned index = 0; index < ARRAY_LEN(_IO_METHODS); ++index) {
+		if (io_method == _IO_METHODS[index].io_method) {
+			return _IO_METHODS[index].name;
+		}
+	}
+	return "unsupported";
+}

src/device.h

@@ -44,6 +44,9 @@
 #define FORMAT_UNKNOWN	-1
 #define FORMATS_STR		"YUYV, UYVY, RGB565, RGB24, JPEG"
 
+#define IO_METHOD_UNKNOWN	-1
+#define IO_METHODS_STR		"MMAP, USERPTR"
+
 
 struct hw_buffer_t {
 	unsigned char		*data;
@@ -57,6 +60,7 @@ struct device_runtime_t {
 	unsigned			width;
 	unsigned			height;
 	unsigned			format;
+	size_t				raw_size;
 	unsigned			n_buffers;
 	unsigned			n_workers;
 	struct hw_buffer_t	*hw_buffers;
@@ -95,6 +99,7 @@ struct device_t {
 	unsigned		height;
 	unsigned		format;
 	v4l2_std_id		standard;
+	enum v4l2_memory	io_method;
 	bool			dv_timings;
 	unsigned		n_buffers;
 	unsigned		n_workers;
@@ -115,6 +120,7 @@ void device_destroy(struct device_t *dev);
 
 int device_parse_format(const char *str);
 v4l2_std_id device_parse_standard(const char *str);
+int device_parse_io_method(const char *str);
 
 int device_open(struct device_t *dev);
 void device_close(struct device_t *dev);

src/encoders/omx/encoder.c

@@ -305,9 +305,7 @@ static int _omx_setup_input(struct omx_encoder_t *omx, struct device_t *dev) {
 	portdef.format.image.nFrameWidth = dev->run->width;
 	portdef.format.image.nFrameHeight = dev->run->height;
 	portdef.format.image.nStride = 0;
-#	define ALIGN_HEIGHT(_x, _y) (((_x) + ((_y) - 1)) & ~((_y) - 1))
-	portdef.format.image.nSliceHeight = ALIGN_HEIGHT(dev->run->height, 16);
-#	undef ALIGN_HEIGHT
+	portdef.format.image.nSliceHeight = align_size(dev->run->height, 16);
 	portdef.format.image.bFlagErrorConcealment = OMX_FALSE;
 	portdef.format.image.eCompressionFormat = OMX_IMAGE_CodingUnused;
 	portdef.nBufferSize = picture_get_generous_size(dev->run->width, dev->run->height);

src/encoders/omx/formatters.c

@@ -67,15 +67,38 @@ const char *omx_error_to_string(OMX_ERRORTYPE error) {
 		CASE_TO_STRING(OMX_ErrorPortUnresponsiveDuringDeallocation);
 		CASE_TO_STRING(OMX_ErrorPortUnresponsiveDuringStop);
 		CASE_TO_STRING(OMX_ErrorIncorrectStateTransition);
+		CASE_TO_STRING(OMX_ErrorIncorrectStateOperation);
+		CASE_TO_STRING(OMX_ErrorUnsupportedSetting);
+		CASE_TO_STRING(OMX_ErrorUnsupportedIndex);
+		CASE_TO_STRING(OMX_ErrorBadPortIndex);
+		CASE_TO_STRING(OMX_ErrorPortUnpopulated);
+		CASE_TO_STRING(OMX_ErrorComponentSuspended);
+		CASE_TO_STRING(OMX_ErrorDynamicResourcesUnavailable);
+		CASE_TO_STRING(OMX_ErrorMbErrorsInFrame);
+		CASE_TO_STRING(OMX_ErrorFormatNotDetected);
+		CASE_TO_STRING(OMX_ErrorContentPipeOpenFailed);
+		CASE_TO_STRING(OMX_ErrorContentPipeCreationFailed);
+		CASE_TO_STRING(OMX_ErrorSeperateTablesUsed);
+		CASE_TO_STRING(OMX_ErrorTunnelingUnsupported);
+		CASE_TO_STRING(OMX_ErrorKhronosExtensions);
+		CASE_TO_STRING(OMX_ErrorVendorStartUnused);
+		CASE_TO_STRING(OMX_ErrorDiskFull);
+		CASE_TO_STRING(OMX_ErrorMaxFileSize);
+		CASE_TO_STRING(OMX_ErrorDrmUnauthorised);
+		CASE_TO_STRING(OMX_ErrorDrmExpired);
+		CASE_TO_STRING(OMX_ErrorDrmGeneral);
 		default: return "Unknown OMX error";
 	}
 }
 
 const char *omx_state_to_string(OMX_STATETYPE state) {
 	switch (state) {
+		CASE_TO_STRING(OMX_StateInvalid);
 		CASE_TO_STRING(OMX_StateLoaded);
 		CASE_TO_STRING(OMX_StateIdle);
 		CASE_TO_STRING(OMX_StateExecuting);
+		CASE_TO_STRING(OMX_StatePause);
+		CASE_TO_STRING(OMX_StateWaitForResources);
 		// cppcheck-suppress constArgument
 		// cppcheck-suppress knownArgument
 		CASE_ASSERT("Unsupported OMX state", state);

src/http/server.c

@@ -85,6 +85,8 @@ static void _http_queue_send_stream(struct http_server_t *server, bool stream_up
 static bool _expose_new_picture_unsafe(struct http_server_t *server);
 static bool _expose_blank_picture(struct http_server_t *server);
 
+static void _format_bufferevent_reason(short what, char *reason);
+
 
 struct http_server_t *http_server_init(struct stream_t *stream) {
 	struct http_server_runtime_t *run;
@@ -533,7 +535,7 @@ static void _http_callback_stream(struct evhttp_request *request, void *v_server
 		}
 
 		evhttp_connection_get_peer(conn, &client_addr, &client_port);
-		LOG_INFO("HTTP: Registered the new stream client: [%s]:%u, id=%s; clients now: %u",
+		LOG_INFO("HTTP: Registered client: [%s]:%u, id=%s; clients now: %u",
 			client_addr, client_port, client->id, server->run->stream_clients_count);
 
 		buf_event = evhttp_connection_get_bufferevent(conn);
@@ -677,6 +679,9 @@ static void _http_callback_stream_error(UNUSED struct bufferevent *buf_event, UN
 	struct evhttp_connection *conn;
 	char *client_addr = "???";
 	unsigned short client_port = 0;
+	char reason[2048] = {0};
+
+	_format_bufferevent_reason(what, reason);
 
 #	define RUN(_next) client->server->run->_next
 
@@ -697,8 +702,9 @@ static void _http_callback_stream_error(UNUSED struct bufferevent *buf_event, UN
 	if (conn) {
 		evhttp_connection_get_peer(conn, &client_addr, &client_port);
 	}
-	LOG_INFO("HTTP: Disconnected the stream client: [%s]:%u; clients now: %u",
-		client_addr, client_port, RUN(stream_clients_count));
+
+	LOG_INFO("HTTP: Disconnected client: [%s]:%u, id=%s, %s; clients now: %u",
+		client_addr, client_port, client->id, reason, RUN(stream_clients_count));
 	if (conn) {
 		evhttp_connection_free(conn);
 	}
@@ -910,3 +916,33 @@ static bool _expose_blank_picture(struct http_server_t *server) {
 
 #	undef EXPOSED
 }
+
+static void _format_bufferevent_reason(short what, char *reason) {
+	char perror_buf[1024] = {0};
+	char *perror_ptr = errno_to_string(EVUTIL_SOCKET_ERROR(), perror_buf, 1024); // evutil_socket_error_to_string() is not thread-sage
+	bool first = true;
+
+	strcat(reason, perror_ptr);
+	strcat(reason, " (");
+
+#	define FILL_REASON(_bev, _name) { \
+			if (what & _bev) { \
+				if (first) { \
+					first = false; \
+				} else { \
+					strcat(reason, ","); \
+				} \
+				strcat(reason, _name); \
+			} \
+		}
+
+	FILL_REASON(BEV_EVENT_READING, "reading");
+	FILL_REASON(BEV_EVENT_WRITING, "writing");
+	FILL_REASON(BEV_EVENT_ERROR, "error");
+	FILL_REASON(BEV_EVENT_TIMEOUT, "timeout");
+	FILL_REASON(BEV_EVENT_EOF, "eof"); // cppcheck-suppress unreadVariable
+
+#	undef FILL_REASON
+
+	strcat(reason, ")");
+}

src/logging.c

@@ -0,0 +1,34 @@
+/*****************************************************************************
+#                                                                            #
+#    uStreamer - Lightweight and fast MJPG-HTTP streamer.                    #
+#                                                                            #
+#    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#include <stdbool.h>
+
+#include <pthread.h>
+
+#include "logging.h"
+
+
+enum log_level_t log_level;
+
+bool log_colored;
+
+pthread_mutex_t log_mutex;

src/logging.h

@@ -37,16 +37,19 @@
 #include "threading.h"
 
 
-enum {
-	LOG_LEVEL_INFO,
-	LOG_LEVEL_PERF,
-	LOG_LEVEL_VERBOSE,
-	LOG_LEVEL_DEBUG,
-} log_level;
+enum log_level_t {
+    LOG_LEVEL_INFO,
+    LOG_LEVEL_PERF,
+    LOG_LEVEL_VERBOSE,
+    LOG_LEVEL_DEBUG,
+};
 
-bool log_colored;
 
-pthread_mutex_t log_mutex;
+extern enum log_level_t log_level;
+
+extern bool log_colored;
+
+extern pthread_mutex_t log_mutex;
 
 
 #define LOGGING_INIT { \
@@ -113,7 +116,7 @@ pthread_mutex_t log_mutex;
 
 #define LOG_PERROR(_msg, ...) { \
 		char _perror_buf[1024] = {0}; \
-		char *_perror_ptr = errno_to_string(_perror_buf, 1024); \
+		char *_perror_ptr = errno_to_string(errno, _perror_buf, 1024); \
 		LOG_ERROR(_msg ": %s", ##__VA_ARGS__, _perror_ptr); \
 	}
 
@@ -146,7 +149,7 @@ pthread_mutex_t log_mutex;
 #define LOG_VERBOSE_PERROR(_msg, ...) { \
 		if (log_level >= LOG_LEVEL_VERBOSE) { \
 			char _perror_buf[1024] = {0}; \
-			char *_perror_ptr = errno_to_string(_perror_buf, 1024); \
+			char *_perror_ptr = errno_to_string(errno, _perror_buf, 1024); \
 			LOG_PRINTF(COLOR_BLUE, "VERB ", COLOR_BLUE, _msg ": %s", ##__VA_ARGS__, _perror_ptr); \
 		} \
 	}
@@ -158,11 +161,11 @@ pthread_mutex_t log_mutex;
 	}
 
 
-INLINE char *errno_to_string(char *buf, size_t size) {
+INLINE char *errno_to_string(int error, char *buf, size_t size) {
 #	if defined(__GLIBC__) && defined(_GNU_SOURCE)
-	return strerror_r(errno, buf, size);
+	return strerror_r(error, buf, size);
 #	else
-	strerror_r(errno, buf, size);
+	strerror_r(error, buf, size);
 	return buf;
 #	endif
 }

src/options.c

@@ -50,6 +50,7 @@ enum _OPT_VALUES {
 	_O_RESOLUTION = 'r',
 	_O_FORMAT = 'm',
 	_O_TV_STANDARD = 'a',
+	_O_IO_METHOD = 'I',
 	_O_DESIRED_FPS = 'f',
 	_O_MIN_FRAME_SIZE = 'z',
 	_O_PERSISTENT = 'n',
@@ -128,6 +129,7 @@ static const struct option _LONG_OPTS[] = {
 	{"resolution",				required_argument,	NULL,	_O_RESOLUTION},
 	{"format",					required_argument,	NULL,	_O_FORMAT},
 	{"tv-standard",				required_argument,	NULL,	_O_TV_STANDARD},
+	{"io-method",				required_argument,	NULL,	_O_IO_METHOD},
 	{"desired-fps",				required_argument,	NULL,	_O_DESIRED_FPS},
 	{"min-frame-size",			required_argument,	NULL,	_O_MIN_FRAME_SIZE},
 	{"persistent",				no_argument,		NULL,	_O_PERSISTENT},
@@ -327,6 +329,7 @@ int options_parse(struct options_t *options, struct device_t *dev, struct encode
 			case _O_FORMAT:			OPT_PARSE("pixel format", dev->format, device_parse_format, FORMAT_UNKNOWN, FORMATS_STR);
 #			pragma GCC diagnostic pop
 			case _O_TV_STANDARD:	OPT_PARSE("TV standard", dev->standard, device_parse_standard, STANDARD_UNKNOWN, STANDARDS_STR);
+			case _O_IO_METHOD:		OPT_PARSE("IO method", dev->io_method, device_parse_io_method, IO_METHOD_UNKNOWN, IO_METHODS_STR);
 			case _O_DESIRED_FPS:	OPT_NUMBER("--desired-fps", dev->desired_fps, 0, VIDEO_MAX_FPS, 0);
 			case _O_MIN_FRAME_SIZE:	OPT_NUMBER("--min-frame-size", dev->min_frame_size, 0, 8192, 0);
 			case _O_PERSISTENT:		OPT_SET(dev->persistent, true);
@@ -548,6 +551,9 @@ static void _help(struct device_t *dev, struct encoder_t *encoder, struct http_s
 	printf("                                           Available: %s; default: YUYV.\n\n", FORMATS_STR);
 	printf("    -a|--tv-standard <std>  ────────────── Force TV standard.\n");
 	printf("                                           Available: %s; default: disabled.\n\n", STANDARDS_STR);
+	printf("    -I|--io-method <method>  ───────────── Set V4L2 IO method (see kernel documentation).\n");
+	printf("                                           Changing of this parameter may increase the performance. Or not.\n");
+	printf("                                           Available: %s; default: MMAP\n\n", IO_METHODS_STR);
 	printf("    -f|--desired-fps <N>  ──────────────── Desired FPS. Default: maximum possible.\n\n");
 	printf("    -z|--min-frame-size <N>  ───────────── Drop frames smaller then this limit. Useful if the device\n");
 	printf("                                           produces small-sized garbage frames. Default: disabled.\n\n");

src/picture.c

@@ -73,9 +73,7 @@ void picture_append_data(struct picture_t *picture, const unsigned char *data, s
 }
 
 void picture_copy(const struct picture_t *src, struct picture_t *dest) {
-	assert(src->allocated);
-
-	picture_set_data(dest, src->data, src->allocated);
+	picture_set_data(dest, src->data, src->used);
 
 #	define COPY(_field) dest->_field = src->_field
 
@@ -92,5 +90,9 @@ void picture_copy(const struct picture_t *src, struct picture_t *dest) {
 }
 
 bool picture_compare(const struct picture_t *a, const struct picture_t *b) {
-	return (a->used == b->used && !memcmp(a->data, b->data, b->used));
+	return (
+		a->allocated && b->allocated
+		&& a->used == b->used
+		&& !memcmp(a->data, b->data, b->used)
+	);
 }

src/tools.h

@@ -45,6 +45,10 @@ INLINE char *bool_to_string(bool flag) {
 	return (flag ? "true" : "false");
 }
 
+INLINE size_t align_size(size_t size, size_t to) {
+	return ((size + (to - 1)) & ~(to - 1));
+}
+
 INLINE unsigned min_u(unsigned a, unsigned b) {
 	return (a < b ? a : b);
 }