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-rw-r--r--libavdevice/v4l2.c280
1 files changed, 192 insertions, 88 deletions
diff --git a/libavdevice/v4l2.c b/libavdevice/v4l2.c
index d57bd755d5..c82a9084d0 100644
--- a/libavdevice/v4l2.c
+++ b/libavdevice/v4l2.c
@@ -1,54 +1,72 @@
/*
- * 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://v4l2spec.bytesex.org/v4l2spec/capture.c)
+ *
+ * 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/avassert.h"
#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;
@@ -56,23 +74,45 @@ 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;
void **buf_start;
unsigned int *buf_len;
char *standard;
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. */
char *framerate; /**< Set by a private option. */
@@ -92,20 +132,30 @@ 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_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 },
{ 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)
@@ -119,7 +169,7 @@ static int device_open(AVFormatContext *ctx)
flags |= O_NONBLOCK;
}
- fd = open(ctx->filename, flags, 0);
+ fd = v4l2_open(ctx->filename, flags, 0);
if (fd < 0) {
err = errno;
@@ -129,7 +179,7 @@ static int device_open(AVFormatContext *ctx)
return AVERROR(err);
}
- res = ioctl(fd, VIDIOC_QUERYCAP, &cap);
+ res = v4l2_ioctl(fd, VIDIOC_QUERYCAP, &cap);
if (res < 0) {
err = errno;
av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QUERYCAP): %s\n",
@@ -159,7 +209,7 @@ static int device_open(AVFormatContext *ctx)
return fd;
fail:
- close(fd);
+ v4l2_close(fd);
return AVERROR(err);
}
@@ -178,7 +228,7 @@ static int device_init(AVFormatContext *ctx, int *width, int *height,
pix->pixelformat = pix_fmt;
pix->field = V4L2_FIELD_ANY;
- res = ioctl(fd, VIDIOC_S_FMT, &fmt);
+ res = v4l2_ioctl(fd, VIDIOC_S_FMT, &fmt);
if ((*width != fmt.fmt.pix.width) || (*height != fmt.fmt.pix.height)) {
av_log(ctx, AV_LOG_INFO,
@@ -209,7 +259,7 @@ 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;
}
@@ -338,34 +388,30 @@ static int mmap_init(AVFormatContext *ctx)
.memory = V4L2_MEMORY_MMAP
};
- res = ioctl(s->fd, VIDIOC_REQBUFS, &req);
+ res = v4l2_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 (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);
}
@@ -375,11 +421,9 @@ static int mmap_init(AVFormatContext *ctx)
.index = i,
.memory = V4L2_MEMORY_MMAP
};
-
- res = ioctl(s->fd, VIDIOC_QUERYBUF, &buf);
+ res = v4l2_ioctl(s->fd, VIDIOC_QUERYBUF, &buf);
if (res < 0) {
av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QUERYBUF)\n");
-
return AVERROR(errno);
}
@@ -391,13 +435,12 @@ static int mmap_init(AVFormatContext *ctx)
return -1;
}
- 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);
}
}
@@ -420,7 +463,7 @@ static void mmap_release_buffer(AVPacket *pkt)
fd = buf_descriptor->fd;
av_free(buf_descriptor);
- res = ioctl(fd, VIDIOC_QBUF, &buf);
+ res = v4l2_ioctl(fd, VIDIOC_QBUF, &buf);
if (res < 0)
av_log(NULL, AV_LOG_ERROR, "ioctl(VIDIOC_QBUF): %s\n",
strerror(errno));
@@ -429,6 +472,66 @@ static void mmap_release_buffer(AVPacket *pkt)
pkt->size = 0;
}
+#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;
@@ -437,22 +540,13 @@ static int mmap_read_frame(AVFormatContext *ctx, AVPacket *pkt)
.memory = V4L2_MEMORY_MMAP
};
struct buff_data *buf_descriptor;
- 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",
@@ -466,6 +560,12 @@ static int mmap_read_frame(AVFormatContext *ctx, AVPacket *pkt)
return AVERROR(EINVAL);
}
+ /* 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",
@@ -478,6 +578,9 @@ static int mmap_read_frame(AVFormatContext *ctx, AVPacket *pkt)
pkt->data= s->buf_start[buf.index];
pkt->size = buf.bytesused;
pkt->pts = buf.timestamp.tv_sec * INT64_C(1000000) + buf.timestamp.tv_usec;
+ res = convert_timestamp(ctx, &pkt->pts);
+ if (res < 0)
+ return res;
pkt->destruct = mmap_release_buffer;
buf_descriptor = av_malloc(sizeof(struct buff_data));
if (buf_descriptor == NULL) {
@@ -485,7 +588,7 @@ static int mmap_read_frame(AVFormatContext *ctx, AVPacket *pkt)
* allocate a buffer for memcopying 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);
}
@@ -509,7 +612,7 @@ static int mmap_start(AVFormatContext *ctx)
.memory = V4L2_MEMORY_MMAP
};
- 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): %s\n",
strerror(errno));
@@ -519,7 +622,7 @@ static int mmap_start(AVFormatContext *ctx)
}
type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- res = ioctl(s->fd, VIDIOC_STREAMON, &type);
+ res = v4l2_ioctl(s->fd, VIDIOC_STREAMON, &type);
if (res < 0) {
av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_STREAMON): %s\n",
strerror(errno));
@@ -539,9 +642,9 @@ 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);
@@ -568,14 +671,14 @@ static int v4l2_set_parameters(AVFormatContext *s1)
/* set tv video input */
input.index = s->channel;
- if (ioctl(s->fd, VIDIOC_ENUMINPUT, &input) < 0) {
+ if (v4l2_ioctl(s->fd, VIDIOC_ENUMINPUT, &input) < 0) {
av_log(s1, AV_LOG_ERROR, "The V4L2 driver ioctl enum input failed:\n");
return AVERROR(EIO);
}
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) {
+ if (v4l2_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);
@@ -588,22 +691,19 @@ static int v4l2_set_parameters(AVFormatContext *s1)
/* set tv standard */
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 (!av_strcasecmp(standard.name, s->standard)) {
+ ret = v4l2_ioctl(s->fd, VIDIOC_ENUMSTD, &standard);
+ if (ret < 0 || !av_strcasecmp(standard.name, s->standard))
break;
- }
+ }
+ if (ret < 0) {
+ av_log(s1, AV_LOG_ERROR, "Unknown standard '%s'\n", s->standard);
+ return ret;
}
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) {
+ if (v4l2_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);
@@ -617,7 +717,7 @@ static int v4l2_set_parameters(AVFormatContext *s1)
tpf->numerator = framerate_q.den;
tpf->denominator = framerate_q.num;
- if (ioctl(s->fd, VIDIOC_S_PARM, &streamparm) != 0) {
+ if (v4l2_ioctl(s->fd, VIDIOC_S_PARM, &streamparm) != 0) {
av_log(s1, AV_LOG_ERROR,
"ioctl set time per frame(%d/%d) failed\n",
framerate_q.den, framerate_q.num);
@@ -633,7 +733,7 @@ static int v4l2_set_parameters(AVFormatContext *s1)
tpf->numerator, tpf->denominator);
}
} else {
- if (ioctl(s->fd, VIDIOC_G_PARM, &streamparm) != 0) {
+ if (v4l2_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);
@@ -642,10 +742,6 @@ static int v4l2_set_parameters(AVFormatContext *s1)
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});
-
return 0;
}
@@ -676,7 +772,7 @@ static uint32_t device_try_init(AVFormatContext *s1,
if (desired_format != 0) {
*codec_id = fmt_v4l2codec(desired_format);
- assert(*codec_id != AV_CODEC_ID_NONE);
+ av_assert0(*codec_id != AV_CODEC_ID_NONE);
}
return desired_format;
@@ -688,7 +784,7 @@ 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;
st = avformat_new_stream(s1, NULL);
@@ -706,13 +802,6 @@ static int v4l2_read_header(AVFormatContext *s1)
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->pixel_format) {
AVCodec *codec = avcodec_find_decoder_by_name(s->pixel_format);
@@ -735,7 +824,7 @@ 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) {
+ if (v4l2_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);
@@ -749,20 +838,27 @@ static int v4l2_read_header(AVFormatContext *s1)
desired_format = device_try_init(s1, pix_fmt, &s->width, &s->height,
&codec_id);
+
+ /* 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 (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);
+ v4l2_close(s->fd);
return AVERROR(EIO);
}
-
- if ((res = av_image_check_size(s->width, s->height, 0, s1) < 0))
+ 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);
@@ -771,7 +867,7 @@ 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;
}
@@ -782,6 +878,8 @@ 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');
st->codec->width = s->width;
st->codec->height = s->height;
st->codec->bit_rate = s->frame_size * av_q2d(st->avg_frame_rate) * 8;
@@ -814,16 +912,17 @@ 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 },
+ { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.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 },
@@ -831,6 +930,11 @@ static const AVOption options[] = {
{ "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" },
+ { "timestamps", "Kind 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" },
+ { "ts", "Kind of timestamps for grabbed frames", OFFSET(ts_mode), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 2, DEC, "timestamps" },
{ NULL },
};
@@ -842,7 +946,7 @@ 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,
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-07 07:37:33 +0000