diff options
Diffstat (limited to 'libavdevice/v4l2.c')
| -rw-r--r-- | libavdevice/v4l2.c | 634 |
1 files changed, 407 insertions, 227 deletions
diff --git a/libavdevice/v4l2.c b/libavdevice/v4l2.c index 9e5aa5e660..14306bd1a2 100644 --- a/libavdevice/v4l2.c +++ b/libavdevice/v4l2.c @@ -1,45 +1,49 @@ /* - * Video4Linux2 grab interface * Copyright (c) 2000,2001 Fabrice Bellard * Copyright (c) 2006 Luca Abeni * - * Part of this file is based on the V4L2 video capture example - * (http://v4l2spec.bytesex.org/v4l2spec/capture.c) - * - * Thanks to Michael Niedermayer for providing the mapping between - * V4L2_PIX_FMT_* and AV_PIX_FMT_* - * + * This file is part of FFmpeg. * - * This file is part of Libav. - * - * Libav is free software; you can redistribute it and/or + * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * - * Libav is distributed in the hope that it will be useful, + * FFmpeg 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public - * License along with Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ +/** + * @file + * Video4Linux2 grab interface + * + * Part of this file is based on the V4L2 video capture example + * (http://linuxtv.org/downloads/v4l-dvb-apis/capture-example.html) + * + * Thanks to Michael Niedermayer for providing the mapping between + * V4L2_PIX_FMT_* and AV_PIX_FMT_* + */ + #undef __STRICT_ANSI__ //workaround due to broken kernel headers #include "config.h" -#include "libavformat/avformat.h" #include "libavformat/internal.h" #include <unistd.h> #include <fcntl.h> #include <sys/ioctl.h> #include <sys/mman.h> #include <sys/time.h> -#include <poll.h> #if HAVE_SYS_VIDEOIO_H #include <sys/videoio.h> #else +#if HAVE_ASM_TYPES_H +#include <asm/types.h> +#endif #include <linux/videodev2.h> #endif #include "libavutil/atomic.h" @@ -47,10 +51,23 @@ #include "libavutil/imgutils.h" #include "libavutil/log.h" #include "libavutil/opt.h" +#include "avdevice.h" +#include "timefilter.h" #include "libavutil/parseutils.h" #include "libavutil/pixdesc.h" #include "libavutil/avstring.h" -#include "libavutil/mathematics.h" + +#if CONFIG_LIBV4L2 +#include <libv4l2.h> +#else +#define v4l2_open open +#define v4l2_close close +#define v4l2_dup dup +#define v4l2_ioctl ioctl +#define v4l2_read read +#define v4l2_mmap mmap +#define v4l2_munmap munmap +#endif static const int desired_video_buffers = 256; @@ -58,26 +75,50 @@ static const int desired_video_buffers = 256; #define V4L_RAWFORMATS 1 #define V4L_COMPFORMATS 2 +/** + * Return timestamps to the user exactly as returned by the kernel + */ +#define V4L_TS_DEFAULT 0 +/** + * Autodetect the kind of timestamps returned by the kernel and convert to + * absolute (wall clock) timestamps. + */ +#define V4L_TS_ABS 1 +/** + * Assume kernel timestamps are from the monotonic clock and convert to + * absolute timestamps. + */ +#define V4L_TS_MONO2ABS 2 + +/** + * Once the kind of timestamps returned by the kernel have been detected, + * the value of the timefilter (NULL or not) determines whether a conversion + * takes place. + */ +#define V4L_TS_CONVERT_READY V4L_TS_DEFAULT + struct video_data { AVClass *class; int fd; int frame_format; /* V4L2_PIX_FMT_* */ int width, height; int frame_size; - int timeout; int interlaced; int top_field_first; + int ts_mode; + TimeFilter *timefilter; + int64_t last_time_m; int buffers; volatile int buffers_queued; void **buf_start; unsigned int *buf_len; char *standard; + v4l2_std_id std_id; int channel; - char *video_size; /**< String describing video size, - set by a private option. */ char *pixel_format; /**< Set by a private option. */ int list_format; /**< Set by a private option. */ + int list_standard; /**< Set by a private option. */ char *framerate; /**< Set by a private option. */ }; @@ -96,75 +137,83 @@ struct fmt_map { static struct fmt_map fmt_conversion_table[] = { //ff_fmt codec_id v4l2_fmt { AV_PIX_FMT_YUV420P, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YUV420 }, + { AV_PIX_FMT_YUV420P, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YVU420 }, { AV_PIX_FMT_YUV422P, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YUV422P }, { AV_PIX_FMT_YUYV422, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YUYV }, { AV_PIX_FMT_UYVY422, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_UYVY }, { AV_PIX_FMT_YUV411P, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YUV411P }, { AV_PIX_FMT_YUV410P, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YUV410 }, - { AV_PIX_FMT_RGB555, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_RGB555 }, - { AV_PIX_FMT_RGB565, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_RGB565 }, + { AV_PIX_FMT_YUV410P, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YVU410 }, + { AV_PIX_FMT_RGB555LE,AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_RGB555 }, + { AV_PIX_FMT_RGB555BE,AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_RGB555X }, + { AV_PIX_FMT_RGB565LE,AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_RGB565 }, + { AV_PIX_FMT_RGB565BE,AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_RGB565X }, { AV_PIX_FMT_BGR24, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_BGR24 }, { AV_PIX_FMT_RGB24, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_RGB24 }, - { AV_PIX_FMT_BGRA, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_BGR32 }, + { AV_PIX_FMT_BGR0, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_BGR32 }, + { AV_PIX_FMT_0RGB, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_RGB32 }, { AV_PIX_FMT_GRAY8, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_GREY }, +#ifdef V4L2_PIX_FMT_Y16 + { AV_PIX_FMT_GRAY16LE,AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_Y16 }, +#endif { AV_PIX_FMT_NV12, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_NV12 }, { AV_PIX_FMT_NONE, AV_CODEC_ID_MJPEG, V4L2_PIX_FMT_MJPEG }, { AV_PIX_FMT_NONE, AV_CODEC_ID_MJPEG, V4L2_PIX_FMT_JPEG }, +#ifdef V4L2_PIX_FMT_H264 + { AV_PIX_FMT_NONE, AV_CODEC_ID_H264, V4L2_PIX_FMT_H264 }, +#endif +#ifdef V4L2_PIX_FMT_CPIA1 + { AV_PIX_FMT_NONE, AV_CODEC_ID_CPIA, V4L2_PIX_FMT_CPIA1 }, +#endif }; static int device_open(AVFormatContext *ctx) { struct v4l2_capability cap; int fd; - int res, err; + int ret; int flags = O_RDWR; if (ctx->flags & AVFMT_FLAG_NONBLOCK) { flags |= O_NONBLOCK; } - fd = open(ctx->filename, flags, 0); + fd = v4l2_open(ctx->filename, flags, 0); if (fd < 0) { - err = errno; - - av_log(ctx, AV_LOG_ERROR, "Cannot open video device %s : %s\n", - ctx->filename, strerror(err)); - - return AVERROR(err); + ret = AVERROR(errno); + av_log(ctx, AV_LOG_ERROR, "Cannot open video device %s: %s\n", + ctx->filename, av_err2str(ret)); + return ret; } - res = ioctl(fd, VIDIOC_QUERYCAP, &cap); - if (res < 0) { - err = errno; + if (v4l2_ioctl(fd, VIDIOC_QUERYCAP, &cap) < 0) { + ret = AVERROR(errno); av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QUERYCAP): %s\n", - strerror(err)); - + av_err2str(ret)); goto fail; } - av_log(ctx, AV_LOG_VERBOSE, "[%d]Capabilities: %x\n", + av_log(ctx, AV_LOG_VERBOSE, "fd:%d capabilities:%x\n", fd, cap.capabilities); if (!(cap.capabilities & V4L2_CAP_VIDEO_CAPTURE)) { av_log(ctx, AV_LOG_ERROR, "Not a video capture device.\n"); - err = ENODEV; - + ret = AVERROR(ENODEV); goto fail; } if (!(cap.capabilities & V4L2_CAP_STREAMING)) { av_log(ctx, AV_LOG_ERROR, "The device does not support the streaming I/O method.\n"); - err = ENOSYS; - + ret = AVERROR(ENOSYS); goto fail; } return fd; fail: - close(fd); - return AVERROR(err); + v4l2_close(fd); + return ret; } static int device_init(AVFormatContext *ctx, int *width, int *height, @@ -175,14 +224,15 @@ static int device_init(AVFormatContext *ctx, int *width, int *height, struct v4l2_format fmt = { .type = V4L2_BUF_TYPE_VIDEO_CAPTURE }; struct v4l2_pix_format *pix = &fmt.fmt.pix; - int res; + int res = 0; pix->width = *width; pix->height = *height; pix->pixelformat = pix_fmt; pix->field = V4L2_FIELD_ANY; - res = ioctl(fd, VIDIOC_S_FMT, &fmt); + if (v4l2_ioctl(fd, VIDIOC_S_FMT, &fmt) < 0) + res = AVERROR(errno); if ((*width != fmt.fmt.pix.width) || (*height != fmt.fmt.pix.height)) { av_log(ctx, AV_LOG_INFO, @@ -197,11 +247,12 @@ static int device_init(AVFormatContext *ctx, int *width, int *height, "The V4L2 driver changed the pixel format " "from 0x%08X to 0x%08X\n", pix_fmt, fmt.fmt.pix.pixelformat); - res = -1; + res = AVERROR(EINVAL); } if (fmt.fmt.pix.field == V4L2_FIELD_INTERLACED) { - av_log(ctx, AV_LOG_DEBUG, "The V4L2 driver using the interlaced mode"); + av_log(ctx, AV_LOG_DEBUG, + "The V4L2 driver is using the interlaced mode\n"); s->interlaced = 1; } @@ -213,7 +264,7 @@ static int first_field(int fd) int res; v4l2_std_id std; - res = ioctl(fd, VIDIOC_G_STD, &std); + res = v4l2_ioctl(fd, VIDIOC_G_STD, &std); if (res < 0) { return 0; } @@ -306,13 +357,13 @@ static void list_formats(AVFormatContext *ctx, int fd, int type) if (!(vfd.flags & V4L2_FMT_FLAG_COMPRESSED) && type & V4L_RAWFORMATS) { const char *fmt_name = av_get_pix_fmt_name(pix_fmt); - av_log(ctx, AV_LOG_INFO, "R : %9s : %20s :", + av_log(ctx, AV_LOG_INFO, "Raw : %9s : %20s :", fmt_name ? fmt_name : "Unsupported", vfd.description); } else if (vfd.flags & V4L2_FMT_FLAG_COMPRESSED && type & V4L_COMPFORMATS) { - AVCodec *codec = avcodec_find_encoder(codec_id); - av_log(ctx, AV_LOG_INFO, "C : %9s : %20s :", + AVCodec *codec = avcodec_find_decoder(codec_id); + av_log(ctx, AV_LOG_INFO, "Compressed: %9s : %20s :", codec ? codec->name : "Unsupported", vfd.description); } else { @@ -332,6 +383,30 @@ static void list_formats(AVFormatContext *ctx, int fd, int type) } } +static void list_standards(AVFormatContext *ctx) +{ + int ret; + struct video_data *s = ctx->priv_data; + struct v4l2_standard standard; + + if (s->std_id == 0) + return; + + for (standard.index = 0; ; standard.index++) { + if (v4l2_ioctl(s->fd, VIDIOC_ENUMSTD, &standard) < 0) { + ret = AVERROR(errno); + if (ret == AVERROR(EINVAL)) { + break; + } else { + av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_ENUMSTD): %s\n", av_err2str(ret)); + return; + } + } + av_log(ctx, AV_LOG_INFO, "%2d, %16llx, %s\n", + standard.index, standard.id, standard.name); + } +} + static int mmap_init(AVFormatContext *ctx) { int i, res; @@ -342,34 +417,26 @@ static int mmap_init(AVFormatContext *ctx) .memory = V4L2_MEMORY_MMAP }; - res = ioctl(s->fd, VIDIOC_REQBUFS, &req); - if (res < 0) { - if (errno == EINVAL) { - av_log(ctx, AV_LOG_ERROR, "Device does not support mmap\n"); - } else { - av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_REQBUFS)\n"); - } - - return AVERROR(errno); + if (v4l2_ioctl(s->fd, VIDIOC_REQBUFS, &req) < 0) { + res = AVERROR(errno); + av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_REQBUFS): %s\n", av_err2str(res)); + return res; } if (req.count < 2) { av_log(ctx, AV_LOG_ERROR, "Insufficient buffer memory\n"); - return AVERROR(ENOMEM); } s->buffers = req.count; s->buf_start = av_malloc(sizeof(void *) * s->buffers); if (s->buf_start == NULL) { av_log(ctx, AV_LOG_ERROR, "Cannot allocate buffer pointers\n"); - return AVERROR(ENOMEM); } s->buf_len = av_malloc(sizeof(unsigned int) * s->buffers); if (s->buf_len == NULL) { av_log(ctx, AV_LOG_ERROR, "Cannot allocate buffer sizes\n"); av_free(s->buf_start); - return AVERROR(ENOMEM); } @@ -379,30 +446,27 @@ static int mmap_init(AVFormatContext *ctx) .index = i, .memory = V4L2_MEMORY_MMAP }; - - res = ioctl(s->fd, VIDIOC_QUERYBUF, &buf); - if (res < 0) { - av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QUERYBUF)\n"); - - return AVERROR(errno); + if (v4l2_ioctl(s->fd, VIDIOC_QUERYBUF, &buf) < 0) { + res = AVERROR(errno); + av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QUERYBUF): %s\n", av_err2str(res)); + return res; } s->buf_len[i] = buf.length; if (s->frame_size > 0 && s->buf_len[i] < s->frame_size) { av_log(ctx, AV_LOG_ERROR, - "Buffer len [%d] = %d != %d\n", + "buf_len[%d] = %d < expected frame size %d\n", i, s->buf_len[i], s->frame_size); - - return -1; + return AVERROR(ENOMEM); } - s->buf_start[i] = mmap(NULL, buf.length, + s->buf_start[i] = v4l2_mmap(NULL, buf.length, PROT_READ | PROT_WRITE, MAP_SHARED, s->fd, buf.m.offset); if (s->buf_start[i] == MAP_FAILED) { - av_log(ctx, AV_LOG_ERROR, "mmap: %s\n", strerror(errno)); - - return AVERROR(errno); + res = AVERROR(errno); + av_log(ctx, AV_LOG_ERROR, "mmap: %s\n", av_err2str(res)); + return res; } } @@ -429,13 +493,75 @@ static void mmap_release_buffer(void *opaque, uint8_t *data) fd = buf_descriptor->fd; av_free(buf_descriptor); - res = ioctl(fd, VIDIOC_QBUF, &buf); - if (res < 0) + if (v4l2_ioctl(fd, VIDIOC_QBUF, &buf) < 0) { + res = AVERROR(errno); av_log(NULL, AV_LOG_ERROR, "ioctl(VIDIOC_QBUF): %s\n", - strerror(errno)); + av_err2str(res)); + } + avpriv_atomic_int_add_and_fetch(&s->buffers_queued, 1); } +#if HAVE_CLOCK_GETTIME && defined(CLOCK_MONOTONIC) +static int64_t av_gettime_monotonic(void) +{ + struct timespec tv; + + clock_gettime(CLOCK_MONOTONIC, &tv); + return (int64_t)tv.tv_sec * 1000000 + tv.tv_nsec / 1000; +} +#endif + +static int init_convert_timestamp(AVFormatContext *ctx, int64_t ts) +{ + struct video_data *s = ctx->priv_data; + int64_t now; + + now = av_gettime(); + if (s->ts_mode == V4L_TS_ABS && + ts <= now + 1 * AV_TIME_BASE && ts >= now - 10 * AV_TIME_BASE) { + av_log(ctx, AV_LOG_INFO, "Detected absolute timestamps\n"); + s->ts_mode = V4L_TS_CONVERT_READY; + return 0; + } +#if HAVE_CLOCK_GETTIME && defined(CLOCK_MONOTONIC) + now = av_gettime_monotonic(); + if (s->ts_mode == V4L_TS_MONO2ABS || + (ts <= now + 1 * AV_TIME_BASE && ts >= now - 10 * AV_TIME_BASE)) { + int64_t period = av_rescale_q(1, AV_TIME_BASE_Q, + ctx->streams[0]->avg_frame_rate); + av_log(ctx, AV_LOG_INFO, "Detected monotonic timestamps, converting\n"); + /* microseconds instead of seconds, MHz instead of Hz */ + s->timefilter = ff_timefilter_new(1, period, 1.0E-6); + s->ts_mode = V4L_TS_CONVERT_READY; + return 0; + } +#endif + av_log(ctx, AV_LOG_ERROR, "Unknown timestamps\n"); + return AVERROR(EIO); +} + +static int convert_timestamp(AVFormatContext *ctx, int64_t *ts) +{ + struct video_data *s = ctx->priv_data; + + if (s->ts_mode) { + int r = init_convert_timestamp(ctx, *ts); + if (r < 0) + return r; + } +#if HAVE_CLOCK_GETTIME && defined(CLOCK_MONOTONIC) + if (s->timefilter) { + int64_t nowa = av_gettime(); + int64_t nowm = av_gettime_monotonic(); + ff_timefilter_update(s->timefilter, nowa, nowm - s->last_time_m); + s->last_time_m = nowm; + *ts = ff_timefilter_eval(s->timefilter, *ts - nowm); + } +#endif + return 0; +} + static int mmap_read_frame(AVFormatContext *ctx, AVPacket *pkt) { struct video_data *s = ctx->priv_data; @@ -443,28 +569,18 @@ static int mmap_read_frame(AVFormatContext *ctx, AVPacket *pkt) .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, .memory = V4L2_MEMORY_MMAP }; - struct pollfd p = { .fd = s->fd, .events = POLLIN }; int res; - res = poll(&p, 1, s->timeout); - if (res < 0) - return AVERROR(errno); - - if (!(p.revents & (POLLIN | POLLERR | POLLHUP))) - return AVERROR(EAGAIN); - /* FIXME: Some special treatment might be needed in case of loss of signal... */ - while ((res = ioctl(s->fd, VIDIOC_DQBUF, &buf)) < 0 && (errno == EINTR)); + while ((res = v4l2_ioctl(s->fd, VIDIOC_DQBUF, &buf)) < 0 && (errno == EINTR)); if (res < 0) { if (errno == EAGAIN) { pkt->size = 0; - return AVERROR(EAGAIN); } - av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_DQBUF): %s\n", - strerror(errno)); - - return AVERROR(errno); + res = AVERROR(errno); + av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_DQBUF): %s\n", av_err2str(res)); + return res; } if (buf.index >= s->buffers) { @@ -475,11 +591,16 @@ static int mmap_read_frame(AVFormatContext *ctx, AVPacket *pkt) // always keep at least one buffer queued av_assert0(avpriv_atomic_int_get(&s->buffers_queued) >= 1); + /* CPIA is a compressed format and we don't know the exact number of bytes + * used by a frame, so set it here as the driver announces it. + */ + if (ctx->video_codec_id == AV_CODEC_ID_CPIA) + s->frame_size = buf.bytesused; + if (s->frame_size > 0 && buf.bytesused != s->frame_size) { av_log(ctx, AV_LOG_ERROR, "The v4l2 frame is %d bytes, but %d bytes are expected\n", buf.bytesused, s->frame_size); - return AVERROR_INVALIDDATA; } @@ -493,7 +614,7 @@ static int mmap_read_frame(AVFormatContext *ctx, AVPacket *pkt) } memcpy(pkt->data, s->buf_start[buf.index], buf.bytesused); - res = ioctl(s->fd, VIDIOC_QBUF, &buf); + res = v4l2_ioctl(s->fd, VIDIOC_QBUF, &buf); if (res < 0) { av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QBUF)\n"); av_free_packet(pkt); @@ -515,7 +636,7 @@ static int mmap_read_frame(AVFormatContext *ctx, AVPacket *pkt) * allocate a buffer for memcpying into it */ av_log(ctx, AV_LOG_ERROR, "Failed to allocate a buffer descriptor\n"); - res = ioctl(s->fd, VIDIOC_QBUF, &buf); + res = v4l2_ioctl(s->fd, VIDIOC_QBUF, &buf); return AVERROR(ENOMEM); } @@ -531,6 +652,7 @@ static int mmap_read_frame(AVFormatContext *ctx, AVPacket *pkt) } } pkt->pts = buf.timestamp.tv_sec * INT64_C(1000000) + buf.timestamp.tv_usec; + convert_timestamp(ctx, &pkt->pts); return s->buf_len[buf.index]; } @@ -548,23 +670,19 @@ static int mmap_start(AVFormatContext *ctx) .memory = V4L2_MEMORY_MMAP }; - res = ioctl(s->fd, VIDIOC_QBUF, &buf); - if (res < 0) { - av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QBUF): %s\n", - strerror(errno)); - - return AVERROR(errno); + if (v4l2_ioctl(s->fd, VIDIOC_QBUF, &buf) < 0) { + res = AVERROR(errno); + av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QBUF): %s\n", av_err2str(res)); + return res; } } s->buffers_queued = s->buffers; type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - res = ioctl(s->fd, VIDIOC_STREAMON, &type); - if (res < 0) { - av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_STREAMON): %s\n", - strerror(errno)); - - return AVERROR(errno); + if (v4l2_ioctl(s->fd, VIDIOC_STREAMON, &type) < 0) { + res = AVERROR(errno); + av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_STREAMON): %s\n", av_err2str(res)); + return res; } return 0; @@ -579,9 +697,9 @@ static void mmap_close(struct video_data *s) /* We do not check for the result, because we could * not do anything about it anyway... */ - ioctl(s->fd, VIDIOC_STREAMOFF, &type); + v4l2_ioctl(s->fd, VIDIOC_STREAMOFF, &type); for (i = 0; i < s->buffers; i++) { - munmap(s->buf_start[i], s->buf_len[i]); + v4l2_munmap(s->buf_start[i], s->buf_len[i]); } av_free(s->buf_start); av_free(s->buf_len); @@ -590,15 +708,12 @@ static void mmap_close(struct video_data *s) static int v4l2_set_parameters(AVFormatContext *s1) { struct video_data *s = s1->priv_data; - struct v4l2_input input = { 0 }; struct v4l2_standard standard = { 0 }; struct v4l2_streamparm streamparm = { 0 }; - struct v4l2_fract *tpf = &streamparm.parm.capture.timeperframe; + struct v4l2_fract *tpf; AVRational framerate_q = { 0 }; int i, ret; - streamparm.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - if (s->framerate && (ret = av_parse_video_rate(&framerate_q, s->framerate)) < 0) { av_log(s1, AV_LOG_ERROR, "Could not parse framerate '%s'.\n", @@ -606,120 +721,149 @@ static int v4l2_set_parameters(AVFormatContext *s1) return ret; } - /* set tv video input */ - input.index = s->channel; - if (ioctl(s->fd, VIDIOC_ENUMINPUT, &input) < 0) { - av_log(s1, AV_LOG_ERROR, "The V4L2 driver ioctl enum input failed:\n"); - return AVERROR(EIO); - } + if (s->standard) { + if (s->std_id) { + ret = 0; + av_log(s1, AV_LOG_DEBUG, "Setting standard: %s\n", s->standard); + /* set tv standard */ + for (i = 0; ; i++) { + standard.index = i; + if (v4l2_ioctl(s->fd, VIDIOC_ENUMSTD, &standard) < 0) { + ret = AVERROR(errno); + break; + } + if (!av_strcasecmp(standard.name, s->standard)) + break; + } + if (ret < 0) { + av_log(s1, AV_LOG_ERROR, "Unknown or unsupported standard '%s'\n", s->standard); + return ret; + } - av_log(s1, AV_LOG_DEBUG, "The V4L2 driver set input_id: %d, input: %s\n", - s->channel, input.name); - if (ioctl(s->fd, VIDIOC_S_INPUT, &input.index) < 0) { - av_log(s1, AV_LOG_ERROR, - "The V4L2 driver ioctl set input(%d) failed\n", - s->channel); - return AVERROR(EIO); + if (v4l2_ioctl(s->fd, VIDIOC_S_STD, &standard.id) < 0) { + ret = AVERROR(errno); + av_log(s1, AV_LOG_ERROR, "ioctl(VIDIOC_S_STD): %s\n", av_err2str(ret)); + return ret; + } + } else { + av_log(s1, AV_LOG_WARNING, + "This device does not support any standard\n"); + } } - if (s->standard) { - av_log(s1, AV_LOG_DEBUG, "The V4L2 driver set standard: %s\n", - s->standard); - /* set tv standard */ - for(i=0;;i++) { + /* get standard */ + if (v4l2_ioctl(s->fd, VIDIOC_G_STD, &s->std_id) == 0) { + tpf = &standard.frameperiod; + for (i = 0; ; i++) { standard.index = i; - if (ioctl(s->fd, VIDIOC_ENUMSTD, &standard) < 0) { - av_log(s1, AV_LOG_ERROR, - "The V4L2 driver ioctl set standard(%s) failed\n", - s->standard); - return AVERROR(EIO); + if (v4l2_ioctl(s->fd, VIDIOC_ENUMSTD, &standard) < 0) { + ret = AVERROR(errno); + av_log(s1, AV_LOG_ERROR, "ioctl(VIDIOC_ENUMSTD): %s\n", av_err2str(ret)); + return ret; } - - if (!av_strcasecmp(standard.name, s->standard)) { + if (standard.id == s->std_id) { + av_log(s1, AV_LOG_DEBUG, + "Current standard: %s, id: %"PRIu64", frameperiod: %d/%d\n", + standard.name, (uint64_t)standard.id, tpf->numerator, tpf->denominator); break; } } + } else { + tpf = &streamparm.parm.capture.timeperframe; + } - av_log(s1, AV_LOG_DEBUG, - "The V4L2 driver set standard: %s, id: %"PRIu64"\n", - s->standard, (uint64_t)standard.id); - if (ioctl(s->fd, VIDIOC_S_STD, &standard.id) < 0) { - av_log(s1, AV_LOG_ERROR, - "The V4L2 driver ioctl set standard(%s) failed\n", - s->standard); - return AVERROR(EIO); - } + streamparm.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + if (v4l2_ioctl(s->fd, VIDIOC_G_PARM, &streamparm) < 0) { + ret = AVERROR(errno); + av_log(s1, AV_LOG_ERROR, "ioctl(VIDIOC_G_PARM): %s\n", av_err2str(ret)); + return ret; } if (framerate_q.num && framerate_q.den) { - av_log(s1, AV_LOG_DEBUG, "Setting time per frame to %d/%d\n", - framerate_q.den, framerate_q.num); - tpf->numerator = framerate_q.den; - tpf->denominator = framerate_q.num; - - if (ioctl(s->fd, VIDIOC_S_PARM, &streamparm) != 0) { - av_log(s1, AV_LOG_ERROR, - "ioctl set time per frame(%d/%d) failed\n", + if (streamparm.parm.capture.capability & V4L2_CAP_TIMEPERFRAME) { + tpf = &streamparm.parm.capture.timeperframe; + + av_log(s1, AV_LOG_DEBUG, "Setting time per frame to %d/%d\n", framerate_q.den, framerate_q.num); - return AVERROR(EIO); - } + tpf->numerator = framerate_q.den; + tpf->denominator = framerate_q.num; - if (framerate_q.num != tpf->denominator || - framerate_q.den != tpf->numerator) { - av_log(s1, AV_LOG_INFO, - "The driver changed the time per frame from " - "%d/%d to %d/%d\n", - framerate_q.den, framerate_q.num, - tpf->numerator, tpf->denominator); - } - } else { - if (ioctl(s->fd, VIDIOC_G_PARM, &streamparm) != 0) { - av_log(s1, AV_LOG_ERROR, "ioctl(VIDIOC_G_PARM): %s\n", - strerror(errno)); - return AVERROR(errno); + if (v4l2_ioctl(s->fd, VIDIOC_S_PARM, &streamparm) < 0) { + ret = AVERROR(errno); + av_log(s1, AV_LOG_ERROR, "ioctl(VIDIOC_S_PARM): %s\n", av_err2str(ret)); + return ret; + } + + if (framerate_q.num != tpf->denominator || + framerate_q.den != tpf->numerator) { + av_log(s1, AV_LOG_INFO, + "The driver changed the time per frame from " + "%d/%d to %d/%d\n", + framerate_q.den, framerate_q.num, + tpf->numerator, tpf->denominator); + } + } else { + av_log(s1, AV_LOG_WARNING, + "The driver does not allow to change time per frame\n"); } } s1->streams[0]->avg_frame_rate.num = tpf->denominator; s1->streams[0]->avg_frame_rate.den = tpf->numerator; - - s->timeout = 100 + - av_rescale_q(1, s1->streams[0]->avg_frame_rate, - (AVRational){1, 1000}); + s1->streams[0]->r_frame_rate = s1->streams[0]->avg_frame_rate; return 0; } -static uint32_t device_try_init(AVFormatContext *s1, - enum AVPixelFormat pix_fmt, - int *width, - int *height, - enum AVCodecID *codec_id) +static int device_try_init(AVFormatContext *s1, + enum AVPixelFormat pix_fmt, + int *width, + int *height, + uint32_t *desired_format, + enum AVCodecID *codec_id) { - uint32_t desired_format = fmt_ff2v4l(pix_fmt, s1->video_codec_id); + int ret, i; - if (desired_format == 0 || - device_init(s1, width, height, desired_format) < 0) { - int i; + *desired_format = fmt_ff2v4l(pix_fmt, s1->video_codec_id); - desired_format = 0; + if (*desired_format) { + ret = device_init(s1, width, height, *desired_format); + if (ret < 0) { + *desired_format = 0; + if (ret != AVERROR(EINVAL)) + return ret; + } + } + + if (!*desired_format) { for (i = 0; i<FF_ARRAY_ELEMS(fmt_conversion_table); i++) { if (s1->video_codec_id == AV_CODEC_ID_NONE || fmt_conversion_table[i].codec_id == s1->video_codec_id) { - desired_format = fmt_conversion_table[i].v4l2_fmt; - if (device_init(s1, width, height, desired_format) >= 0) { + av_log(s1, AV_LOG_DEBUG, "Trying to set codec:%s pix_fmt:%s\n", + avcodec_get_name(fmt_conversion_table[i].codec_id), + (char *)av_x_if_null(av_get_pix_fmt_name(fmt_conversion_table[i].ff_fmt), "none")); + + *desired_format = fmt_conversion_table[i].v4l2_fmt; + ret = device_init(s1, width, height, *desired_format); + if (ret >= 0) break; - } - desired_format = 0; + else if (ret != AVERROR(EINVAL)) + return ret; + *desired_format = 0; } } - } - if (desired_format != 0) { - *codec_id = fmt_v4l2codec(desired_format); - assert(*codec_id != AV_CODEC_ID_NONE); + if (*desired_format == 0) { + av_log(s1, AV_LOG_ERROR, "Cannot find a proper format for " + "codec '%s' (id %d), pixel format '%s' (id %d)\n", + avcodec_get_name(s1->video_codec_id), s1->video_codec_id, + (char *)av_x_if_null(av_get_pix_fmt_name(pix_fmt), "none"), pix_fmt); + ret = AVERROR(EINVAL); + } } - return desired_format; + *codec_id = fmt_v4l2codec(*desired_format); + av_assert0(*codec_id != AV_CODEC_ID_NONE); + return ret; } static int v4l2_read_header(AVFormatContext *s1) @@ -728,8 +872,9 @@ static int v4l2_read_header(AVFormatContext *s1) AVStream *st; int res = 0; uint32_t desired_format; - enum AVCodecID codec_id; + enum AVCodecID codec_id = AV_CODEC_ID_NONE; enum AVPixelFormat pix_fmt = AV_PIX_FMT_NONE; + struct v4l2_input input = { 0 }; st = avformat_new_stream(s1, NULL); if (!st) @@ -739,20 +884,36 @@ static int v4l2_read_header(AVFormatContext *s1) if (s->fd < 0) return s->fd; + /* set tv video input */ + av_log(s1, AV_LOG_DEBUG, "Selecting input_channel: %d\n", s->channel); + if (v4l2_ioctl(s->fd, VIDIOC_S_INPUT, &s->channel) < 0) { + res = AVERROR(errno); + av_log(s1, AV_LOG_ERROR, "ioctl(VIDIOC_S_INPUT): %s\n", av_err2str(res)); + return res; + } + + input.index = s->channel; + if (v4l2_ioctl(s->fd, VIDIOC_ENUMINPUT, &input) < 0) { + res = AVERROR(errno); + av_log(s1, AV_LOG_ERROR, "ioctl(VIDIOC_ENUMINPUT): %s\n", av_err2str(res)); + return res; + } + s->std_id = input.std; + av_log(s1, AV_LOG_DEBUG, "input_channel: %d, input_name: %s\n", + s->channel, input.name); + if (s->list_format) { list_formats(s1, s->fd, s->list_format); return AVERROR_EXIT; } - avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */ - - if (s->video_size && - (res = av_parse_video_size(&s->width, &s->height, s->video_size)) < 0) { - av_log(s1, AV_LOG_ERROR, "Could not parse video size '%s'.\n", - s->video_size); - return res; + if (s->list_standard) { + list_standards(s1); + return AVERROR_EXIT; } + avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */ + if (s->pixel_format) { AVCodec *codec = avcodec_find_decoder_by_name(s->pixel_format); @@ -775,10 +936,10 @@ static int v4l2_read_header(AVFormatContext *s1) av_log(s1, AV_LOG_VERBOSE, "Querying the device for the current frame size\n"); fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - if (ioctl(s->fd, VIDIOC_G_FMT, &fmt) < 0) { - av_log(s1, AV_LOG_ERROR, "ioctl(VIDIOC_G_FMT): %s\n", - strerror(errno)); - return AVERROR(errno); + if (v4l2_ioctl(s->fd, VIDIOC_G_FMT, &fmt) < 0) { + res = AVERROR(errno); + av_log(s1, AV_LOG_ERROR, "ioctl(VIDIOC_G_FMT): %s\n", av_err2str(res)); + return res; } s->width = fmt.fmt.pix.width; @@ -787,22 +948,25 @@ static int v4l2_read_header(AVFormatContext *s1) "Setting frame size to %dx%d\n", s->width, s->height); } - desired_format = device_try_init(s1, pix_fmt, &s->width, &s->height, - &codec_id); - if (desired_format == 0) { - av_log(s1, AV_LOG_ERROR, "Cannot find a proper format for " - "codec_id %d, pix_fmt %d.\n", s1->video_codec_id, pix_fmt); - close(s->fd); - - return AVERROR(EIO); + res = device_try_init(s1, pix_fmt, &s->width, &s->height, &desired_format, &codec_id); + if (res < 0) { + v4l2_close(s->fd); + return res; } - if ((res = av_image_check_size(s->width, s->height, 0, s1) < 0)) + /* If no pixel_format was specified, the codec_id was not known up + * until now. Set video_codec_id in the context, as codec_id will + * not be available outside this function + */ + if (codec_id != AV_CODEC_ID_NONE && s1->video_codec_id == AV_CODEC_ID_NONE) + s1->video_codec_id = codec_id; + + if ((res = av_image_check_size(s->width, s->height, 0, s1)) < 0) return res; s->frame_format = desired_format; - if ((res = v4l2_set_parameters(s1) < 0)) + if ((res = v4l2_set_parameters(s1)) < 0) return res; st->codec->pix_fmt = fmt_v4l2ff(desired_format, codec_id); @@ -811,7 +975,7 @@ static int v4l2_read_header(AVFormatContext *s1) if ((res = mmap_init(s1)) || (res = mmap_start(s1)) < 0) { - close(s->fd); + v4l2_close(s->fd); return res; } @@ -822,6 +986,10 @@ static int v4l2_read_header(AVFormatContext *s1) if (codec_id == AV_CODEC_ID_RAWVIDEO) st->codec->codec_tag = avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt); + if (desired_format == V4L2_PIX_FMT_YVU420) + st->codec->codec_tag = MKTAG('Y', 'V', '1', '2'); + else if (desired_format == V4L2_PIX_FMT_YVU410) + st->codec->codec_tag = MKTAG('Y', 'V', 'U', '9'); st->codec->width = s->width; st->codec->height = s->height; st->codec->bit_rate = s->frame_size * av_q2d(st->avg_frame_rate) * 8; @@ -858,23 +1026,35 @@ static int v4l2_read_close(AVFormatContext *s1) mmap_close(s); - close(s->fd); + v4l2_close(s->fd); return 0; } #define OFFSET(x) offsetof(struct video_data, x) #define DEC AV_OPT_FLAG_DECODING_PARAM + static const AVOption options[] = { - { "standard", "TV standard, used only by analog frame grabber", OFFSET(standard), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC }, - { "channel", "TV channel, used only by frame grabber", OFFSET(channel), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, DEC }, - { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC }, - { "pixel_format", "Preferred pixel format", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC }, - { "input_format", "Preferred pixel format (for raw video) or codec name", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC }, - { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC }, - { "list_formats", "List available formats and exit", OFFSET(list_format), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, DEC, "list_formats" }, - { "all", "Show all available formats", OFFSET(list_format), AV_OPT_TYPE_CONST, {.i64 = V4L_ALLFORMATS }, 0, INT_MAX, DEC, "list_formats" }, - { "raw", "Show only non-compressed formats", OFFSET(list_format), AV_OPT_TYPE_CONST, {.i64 = V4L_RAWFORMATS }, 0, INT_MAX, DEC, "list_formats" }, - { "compressed", "Show only compressed formats", OFFSET(list_format), AV_OPT_TYPE_CONST, {.i64 = V4L_COMPFORMATS }, 0, INT_MAX, DEC, "list_formats" }, + { "standard", "set TV standard, used only by analog frame grabber", OFFSET(standard), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC }, + { "channel", "set TV channel, used only by frame grabber", OFFSET(channel), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, DEC }, + { "video_size", "set frame size", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, DEC }, + { "pixel_format", "set preferred pixel format", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC }, + { "input_format", "set preferred pixel format (for raw video) or codec name", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC }, + { "framerate", "set frame rate", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC }, + + { "list_formats", "list available formats and exit", OFFSET(list_format), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, DEC, "list_formats" }, + { "all", "show all available formats", OFFSET(list_format), AV_OPT_TYPE_CONST, {.i64 = V4L_ALLFORMATS }, 0, INT_MAX, DEC, "list_formats" }, + { "raw", "show only non-compressed formats", OFFSET(list_format), AV_OPT_TYPE_CONST, {.i64 = V4L_RAWFORMATS }, 0, INT_MAX, DEC, "list_formats" }, + { "compressed", "show only compressed formats", OFFSET(list_format), AV_OPT_TYPE_CONST, {.i64 = V4L_COMPFORMATS }, 0, INT_MAX, DEC, "list_formats" }, + + { "list_standards", "list supported standards and exit", OFFSET(list_standard), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 1, DEC, "list_standards" }, + { "all", "show all supported standards", OFFSET(list_standard), AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, DEC, "list_standards" }, + + { "timestamps", "set type of timestamps for grabbed frames", OFFSET(ts_mode), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 2, DEC, "timestamps" }, + { "ts", "set type of timestamps for grabbed frames", OFFSET(ts_mode), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 2, DEC, "timestamps" }, + { "default", "use timestamps from the kernel", OFFSET(ts_mode), AV_OPT_TYPE_CONST, {.i64 = V4L_TS_DEFAULT }, 0, 2, DEC, "timestamps" }, + { "abs", "use absolute timestamps (wall clock)", OFFSET(ts_mode), AV_OPT_TYPE_CONST, {.i64 = V4L_TS_ABS }, 0, 2, DEC, "timestamps" }, + { "mono2abs", "force conversion from monotonic to absolute timestamps", OFFSET(ts_mode), AV_OPT_TYPE_CONST, {.i64 = V4L_TS_MONO2ABS }, 0, 2, DEC, "timestamps" }, + { NULL }, }; @@ -886,7 +1066,7 @@ static const AVClass v4l2_class = { }; AVInputFormat ff_v4l2_demuxer = { - .name = "video4linux2", + .name = "video4linux2,v4l2", .long_name = NULL_IF_CONFIG_SMALL("Video4Linux2 device grab"), .priv_data_size = sizeof(struct video_data), .read_header = v4l2_read_header, |