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-rw-r--r--libavdevice/v4l2.c1039
1 files changed, 625 insertions, 414 deletions
diff --git a/libavdevice/v4l2.c b/libavdevice/v4l2.c
index 46db25dbd3..103fb105f2 100644
--- a/libavdevice/v4l2.c
+++ b/libavdevice/v4l2.c
@@ -1,57 +1,41 @@
/*
- * 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
*/
-#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
-#include <linux/videodev2.h>
+/**
+ * @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_*
+ */
+
+#include "v4l2-common.h"
+#include <dirent.h>
+
+#if CONFIG_LIBV4L2
+#include <libv4l2.h>
#endif
-#include "libavutil/atomic.h"
-#include "libavutil/avassert.h"
-#include "libavutil/imgutils.h"
-#include "libavutil/internal.h"
-#include "libavutil/log.h"
-#include "libavutil/opt.h"
-#include "libavutil/parseutils.h"
-#include "libavutil/pixdesc.h"
-#include "libavutil/avstring.h"
-#include "libavutil/mathematics.h"
static const int desired_video_buffers = 256;
@@ -59,103 +43,129 @@ 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 pixelformat; /* 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. */
+
+ int use_libv4l2;
+ int (*open_f)(const char *file, int oflag, ...);
+ int (*close_f)(int fd);
+ int (*dup_f)(int fd);
+ int (*ioctl_f)(int fd, unsigned long int request, ...);
+ ssize_t (*read_f)(int fd, void *buffer, size_t n);
+ void *(*mmap_f)(void *start, size_t length, int prot, int flags, int fd, int64_t offset);
+ int (*munmap_f)(void *_start, size_t length);
};
struct buff_data {
struct video_data *s;
int index;
- int fd;
-};
-
-struct fmt_map {
- enum AVPixelFormat ff_fmt;
- enum AVCodecID codec_id;
- uint32_t v4l2_fmt;
-};
-
-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_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_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_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
};
static int device_open(AVFormatContext *ctx)
{
+ struct video_data *s = ctx->priv_data;
struct v4l2_capability cap;
int fd;
- int res, err;
+ int err;
int flags = O_RDWR;
- char errbuf[128];
+
+#define SET_WRAPPERS(prefix) do { \
+ s->open_f = prefix ## open; \
+ s->close_f = prefix ## close; \
+ s->dup_f = prefix ## dup; \
+ s->ioctl_f = prefix ## ioctl; \
+ s->read_f = prefix ## read; \
+ s->mmap_f = prefix ## mmap; \
+ s->munmap_f = prefix ## munmap; \
+} while (0)
+
+ if (s->use_libv4l2) {
+#if CONFIG_LIBV4L2
+ SET_WRAPPERS(v4l2_);
+#else
+ av_log(ctx, AV_LOG_ERROR, "libavdevice is not built with libv4l2 support.\n");
+ return AVERROR(EINVAL);
+#endif
+ } else {
+ SET_WRAPPERS();
+ }
+
+#define v4l2_open s->open_f
+#define v4l2_close s->close_f
+#define v4l2_dup s->dup_f
+#define v4l2_ioctl s->ioctl_f
+#define v4l2_read s->read_f
+#define v4l2_mmap s->mmap_f
+#define v4l2_munmap s->munmap_f
if (ctx->flags & AVFMT_FLAG_NONBLOCK) {
flags |= O_NONBLOCK;
}
- fd = avpriv_open(ctx->filename, flags);
+ fd = v4l2_open(ctx->filename, flags, 0);
if (fd < 0) {
err = AVERROR(errno);
- av_strerror(err, errbuf, sizeof(errbuf));
-
- av_log(ctx, AV_LOG_ERROR, "Cannot open video device %s : %s\n",
- ctx->filename, errbuf);
-
+ av_log(ctx, AV_LOG_ERROR, "Cannot open video device %s: %s\n",
+ ctx->filename, av_err2str(err));
return err;
}
- res = ioctl(fd, VIDIOC_QUERYCAP, &cap);
- if (res < 0) {
+ if (v4l2_ioctl(fd, VIDIOC_QUERYCAP, &cap) < 0) {
err = AVERROR(errno);
- av_strerror(err, errbuf, sizeof(errbuf));
av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QUERYCAP): %s\n",
- errbuf);
-
+ av_err2str(err));
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 = AVERROR(ENODEV);
-
goto fail;
}
@@ -163,33 +173,32 @@ static int device_open(AVFormatContext *ctx)
av_log(ctx, AV_LOG_ERROR,
"The device does not support the streaming I/O method.\n");
err = AVERROR(ENOSYS);
-
goto fail;
}
return fd;
fail:
- close(fd);
+ v4l2_close(fd);
return err;
}
static int device_init(AVFormatContext *ctx, int *width, int *height,
- uint32_t pix_fmt)
+ uint32_t pixelformat)
{
struct video_data *s = ctx->priv_data;
- int fd = s->fd;
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;
+ fmt.fmt.pix.width = *width;
+ fmt.fmt.pix.height = *height;
+ fmt.fmt.pix.pixelformat = pixelformat;
+ fmt.fmt.pix.field = V4L2_FIELD_ANY;
- res = ioctl(fd, VIDIOC_S_FMT, &fmt);
+ /* Some drivers will fail and return EINVAL when the pixelformat
+ is not supported (even if type field is valid and supported) */
+ if (v4l2_ioctl(s->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,
@@ -199,87 +208,44 @@ static int device_init(AVFormatContext *ctx, int *width, int *height,
*height = fmt.fmt.pix.height;
}
- if (pix_fmt != fmt.fmt.pix.pixelformat) {
+ if (pixelformat != fmt.fmt.pix.pixelformat) {
av_log(ctx, AV_LOG_DEBUG,
"The V4L2 driver changed the pixel format "
"from 0x%08X to 0x%08X\n",
- pix_fmt, fmt.fmt.pix.pixelformat);
- res = -1;
+ pixelformat, fmt.fmt.pix.pixelformat);
+ 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;
}
return res;
}
-static int first_field(int fd)
+static int first_field(const struct video_data *s)
{
int res;
v4l2_std_id std;
- res = ioctl(fd, VIDIOC_G_STD, &std);
- if (res < 0) {
+ res = v4l2_ioctl(s->fd, VIDIOC_G_STD, &std);
+ if (res < 0)
return 0;
- }
- if (std & V4L2_STD_NTSC) {
+ if (std & V4L2_STD_NTSC)
return 0;
- }
return 1;
}
-static uint32_t fmt_ff2v4l(enum AVPixelFormat pix_fmt, enum AVCodecID codec_id)
-{
- int i;
-
- for (i = 0; i < FF_ARRAY_ELEMS(fmt_conversion_table); i++) {
- if ((codec_id == AV_CODEC_ID_NONE ||
- fmt_conversion_table[i].codec_id == codec_id) &&
- (pix_fmt == AV_PIX_FMT_NONE ||
- fmt_conversion_table[i].ff_fmt == pix_fmt)) {
- return fmt_conversion_table[i].v4l2_fmt;
- }
- }
-
- return 0;
-}
-
-static enum AVPixelFormat fmt_v4l2ff(uint32_t v4l2_fmt, enum AVCodecID codec_id)
-{
- int i;
-
- for (i = 0; i < FF_ARRAY_ELEMS(fmt_conversion_table); i++) {
- if (fmt_conversion_table[i].v4l2_fmt == v4l2_fmt &&
- fmt_conversion_table[i].codec_id == codec_id) {
- return fmt_conversion_table[i].ff_fmt;
- }
- }
-
- return AV_PIX_FMT_NONE;
-}
-
-static enum AVCodecID fmt_v4l2codec(uint32_t v4l2_fmt)
-{
- int i;
-
- for (i = 0; i < FF_ARRAY_ELEMS(fmt_conversion_table); i++) {
- if (fmt_conversion_table[i].v4l2_fmt == v4l2_fmt) {
- return fmt_conversion_table[i].codec_id;
- }
- }
-
- return AV_CODEC_ID_NONE;
-}
-
#if HAVE_STRUCT_V4L2_FRMIVALENUM_DISCRETE
-static void list_framesizes(AVFormatContext *ctx, int fd, uint32_t pixelformat)
+static void list_framesizes(AVFormatContext *ctx, uint32_t pixelformat)
{
+ const struct video_data *s = ctx->priv_data;
struct v4l2_frmsizeenum vfse = { .pixel_format = pixelformat };
- while(!ioctl(fd, VIDIOC_ENUM_FRAMESIZES, &vfse)) {
+ while(!v4l2_ioctl(s->fd, VIDIOC_ENUM_FRAMESIZES, &vfse)) {
switch (vfse.type) {
case V4L2_FRMSIZE_TYPE_DISCRETE:
av_log(ctx, AV_LOG_INFO, " %ux%u",
@@ -300,26 +266,27 @@ static void list_framesizes(AVFormatContext *ctx, int fd, uint32_t pixelformat)
}
#endif
-static void list_formats(AVFormatContext *ctx, int fd, int type)
+static void list_formats(AVFormatContext *ctx, int type)
{
+ const struct video_data *s = ctx->priv_data;
struct v4l2_fmtdesc vfd = { .type = V4L2_BUF_TYPE_VIDEO_CAPTURE };
- while(!ioctl(fd, VIDIOC_ENUM_FMT, &vfd)) {
- enum AVCodecID codec_id = fmt_v4l2codec(vfd.pixelformat);
- enum AVPixelFormat pix_fmt = fmt_v4l2ff(vfd.pixelformat, codec_id);
+ while(!v4l2_ioctl(s->fd, VIDIOC_ENUM_FMT, &vfd)) {
+ enum AVCodecID codec_id = ff_fmt_v4l2codec(vfd.pixelformat);
+ enum AVPixelFormat pix_fmt = ff_fmt_v4l2ff(vfd.pixelformat, codec_id);
vfd.index++;
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 : %11s : %20s :",
fmt_name ? fmt_name : "Unsupported",
vfd.description);
} else if (vfd.flags & V4L2_FMT_FLAG_COMPRESSED &&
type & V4L_COMPFORMATS) {
const AVCodecDescriptor *desc = avcodec_descriptor_get(codec_id);
- av_log(ctx, AV_LOG_INFO, "C : %9s : %20s :",
+ av_log(ctx, AV_LOG_INFO, "Compressed: %11s : %20s :",
desc ? desc->name : "Unsupported",
vfd.description);
} else {
@@ -327,18 +294,40 @@ static void list_formats(AVFormatContext *ctx, int fd, int type)
}
#ifdef V4L2_FMT_FLAG_EMULATED
- if (vfd.flags & V4L2_FMT_FLAG_EMULATED) {
- av_log(ctx, AV_LOG_WARNING, "%s", "Emulated");
- continue;
- }
+ if (vfd.flags & V4L2_FMT_FLAG_EMULATED)
+ av_log(ctx, AV_LOG_INFO, " Emulated :");
#endif
#if HAVE_STRUCT_V4L2_FRMIVALENUM_DISCRETE
- list_framesizes(ctx, fd, vfd.pixelformat);
+ list_framesizes(ctx, vfd.pixelformat);
#endif
av_log(ctx, AV_LOG_INFO, "\n");
}
}
+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, %16"PRIx64", %s\n",
+ standard.index, (uint64_t)standard.id, standard.name);
+ }
+}
+
static int mmap_init(AVFormatContext *ctx)
{
int i, res;
@@ -349,35 +338,26 @@ static int mmap_init(AVFormatContext *ctx)
.memory = V4L2_MEMORY_MMAP
};
- res = ioctl(s->fd, VIDIOC_REQBUFS, &req);
- if (res < 0) {
+ if (v4l2_ioctl(s->fd, VIDIOC_REQBUFS, &req) < 0) {
res = AVERROR(errno);
- if (res == AVERROR(EINVAL)) {
- av_log(ctx, AV_LOG_ERROR, "Device does not support mmap\n");
- } else {
- av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_REQBUFS)\n");
- }
-
+ 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);
+ s->buf_start = av_malloc_array(s->buffers, sizeof(void *));
if (!s->buf_start) {
av_log(ctx, AV_LOG_ERROR, "Cannot allocate buffer pointers\n");
-
return AVERROR(ENOMEM);
}
- s->buf_len = av_malloc(sizeof(unsigned int) * s->buffers);
+ s->buf_len = av_malloc_array(s->buffers, sizeof(unsigned int));
if (!s->buf_len) {
av_log(ctx, AV_LOG_ERROR, "Cannot allocate buffer sizes\n");
- av_free(s->buf_start);
-
+ av_freep(&s->buf_start);
return AVERROR(ENOMEM);
}
@@ -387,33 +367,26 @@ static int mmap_init(AVFormatContext *ctx)
.index = i,
.memory = V4L2_MEMORY_MMAP
};
-
- res = ioctl(s->fd, VIDIOC_QUERYBUF, &buf);
- if (res < 0) {
+ if (v4l2_ioctl(s->fd, VIDIOC_QUERYBUF, &buf) < 0) {
res = AVERROR(errno);
- av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QUERYBUF)\n");
-
+ 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) {
- char errbuf[128];
res = AVERROR(errno);
- av_strerror(res, errbuf, sizeof(errbuf));
- av_log(ctx, AV_LOG_ERROR, "mmap: %s\n", errbuf);
-
+ av_log(ctx, AV_LOG_ERROR, "mmap: %s\n", av_err2str(res));
return res;
}
}
@@ -421,27 +394,93 @@ static int mmap_init(AVFormatContext *ctx)
return 0;
}
+static int enqueue_buffer(struct video_data *s, struct v4l2_buffer *buf)
+{
+ int res = 0;
+
+ if (v4l2_ioctl(s->fd, VIDIOC_QBUF, buf) < 0) {
+ res = AVERROR(errno);
+ av_log(NULL, AV_LOG_ERROR, "ioctl(VIDIOC_QBUF): %s\n", av_err2str(res));
+ } else {
+ avpriv_atomic_int_add_and_fetch(&s->buffers_queued, 1);
+ }
+
+ return res;
+}
+
static void mmap_release_buffer(void *opaque, uint8_t *data)
{
struct v4l2_buffer buf = { 0 };
- int res, fd;
struct buff_data *buf_descriptor = opaque;
struct video_data *s = buf_descriptor->s;
- char errbuf[128];
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
buf.index = buf_descriptor->index;
- fd = buf_descriptor->fd;
av_free(buf_descriptor);
- res = ioctl(fd, VIDIOC_QBUF, &buf);
- if (res < 0) {
- av_strerror(AVERROR(errno), errbuf, sizeof(errbuf));
- av_log(NULL, AV_LOG_ERROR, "ioctl(VIDIOC_QBUF): %s\n",
- errbuf);
+ enqueue_buffer(s, &buf);
+}
+
+#if HAVE_CLOCK_GETTIME && defined(CLOCK_MONOTONIC)
+static int64_t av_gettime_monotonic(void)
+{
+ return av_gettime_relative();
+}
+#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)
+ if (ctx->streams[0]->avg_frame_rate.num) {
+ now = av_gettime_monotonic();
+ if (s->ts_mode == V4L_TS_MONO2ABS ||
+ (ts <= now + 1 * AV_TIME_BASE && ts >= now - 10 * AV_TIME_BASE)) {
+ AVRational tb = {AV_TIME_BASE, 1};
+ int64_t period = av_rescale_q(1, tb, 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);
+ if (!s->timefilter)
+ return AVERROR(ENOMEM);
+ s->ts_mode = V4L_TS_CONVERT_READY;
+ return 0;
+ }
}
- avpriv_atomic_int_add_and_fetch(&s->buffers_queued, 1);
+#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)
@@ -451,30 +490,19 @@ 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);
+ pkt->size = 0;
/* 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) {
- char errbuf[128];
- if (errno == EAGAIN) {
- pkt->size = 0;
-
+ if (errno == EAGAIN)
return AVERROR(EAGAIN);
- }
+
res = AVERROR(errno);
- av_strerror(res, errbuf, sizeof(errbuf));
av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_DQBUF): %s\n",
- errbuf);
-
+ av_err2str(res));
return res;
}
@@ -486,12 +514,27 @@ 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);
- 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);
+#ifdef V4L2_BUF_FLAG_ERROR
+ if (buf.flags & V4L2_BUF_FLAG_ERROR) {
+ av_log(ctx, AV_LOG_WARNING,
+ "Dequeued v4l2 buffer contains corrupted data (%d bytes).\n",
+ buf.bytesused);
+ buf.bytesused = 0;
+ } else
+#endif
+ {
+ /* 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;
- return AVERROR_INVALIDDATA;
+ if (s->frame_size > 0 && buf.bytesused != s->frame_size) {
+ av_log(ctx, AV_LOG_ERROR,
+ "Dequeued v4l2 buffer contains %d bytes, but %d were expected. Flags: 0x%08X.\n",
+ buf.bytesused, s->frame_size, buf.flags);
+ enqueue_buffer(s, &buf);
+ return AVERROR_INVALIDDATA;
+ }
}
/* Image is at s->buff_start[buf.index] */
@@ -500,18 +543,16 @@ static int mmap_read_frame(AVFormatContext *ctx, AVPacket *pkt)
res = av_new_packet(pkt, buf.bytesused);
if (res < 0) {
av_log(ctx, AV_LOG_ERROR, "Error allocating a packet.\n");
+ enqueue_buffer(s, &buf);
return res;
}
memcpy(pkt->data, s->buf_start[buf.index], buf.bytesused);
- res = ioctl(s->fd, VIDIOC_QBUF, &buf);
- if (res < 0) {
- res = AVERROR(errno);
- av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QBUF)\n");
+ res = enqueue_buffer(s, &buf);
+ if (res) {
av_packet_unref(pkt);
return res;
}
- avpriv_atomic_int_add_and_fetch(&s->buffers_queued, 1);
} else {
struct buff_data *buf_descriptor;
@@ -524,32 +565,33 @@ 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);
+ enqueue_buffer(s, &buf);
return AVERROR(ENOMEM);
}
- buf_descriptor->fd = s->fd;
buf_descriptor->index = buf.index;
buf_descriptor->s = s;
pkt->buf = av_buffer_create(pkt->data, pkt->size, mmap_release_buffer,
buf_descriptor, 0);
if (!pkt->buf) {
+ av_log(ctx, AV_LOG_ERROR, "Failed to create a buffer\n");
+ enqueue_buffer(s, &buf);
av_freep(&buf_descriptor);
return AVERROR(ENOMEM);
}
}
pkt->pts = buf.timestamp.tv_sec * INT64_C(1000000) + buf.timestamp.tv_usec;
+ convert_timestamp(ctx, &pkt->pts);
- return s->buf_len[buf.index];
+ return pkt->size;
}
static int mmap_start(AVFormatContext *ctx)
{
struct video_data *s = ctx->priv_data;
enum v4l2_buf_type type;
- int i, res, err;
- char errbuf[128];
+ int i, res;
for (i = 0; i < s->buffers; i++) {
struct v4l2_buffer buf = {
@@ -558,27 +600,21 @@ static int mmap_start(AVFormatContext *ctx)
.memory = V4L2_MEMORY_MMAP
};
- res = ioctl(s->fd, VIDIOC_QBUF, &buf);
- if (res < 0) {
- err = AVERROR(errno);
- av_strerror(err, errbuf, sizeof(errbuf));
+ if (v4l2_ioctl(s->fd, VIDIOC_QBUF, &buf) < 0) {
+ res = AVERROR(errno);
av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QBUF): %s\n",
- errbuf);
-
- return err;
+ 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) {
- err = AVERROR(errno);
- av_strerror(err, errbuf, sizeof(errbuf));
+ if (v4l2_ioctl(s->fd, VIDIOC_STREAMON, &type) < 0) {
+ res = AVERROR(errno);
av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_STREAMON): %s\n",
- errbuf);
-
- return err;
+ av_err2str(res));
+ return res;
}
return 0;
@@ -593,276 +629,361 @@ 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);
+ av_freep(&s->buf_start);
+ av_freep(&s->buf_len);
}
-static int v4l2_set_parameters(AVFormatContext *s1)
+static int v4l2_set_parameters(AVFormatContext *ctx)
{
- struct video_data *s = s1->priv_data;
- struct v4l2_input input = { 0 };
+ struct video_data *s = ctx->priv_data;
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",
+ av_log(ctx, AV_LOG_ERROR, "Could not parse framerate '%s'.\n",
s->framerate);
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(ctx, 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(ctx, 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(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_S_STD): %s\n", av_err2str(ret));
+ return ret;
+ }
+ } else {
+ av_log(ctx, 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);
+ if (ret == AVERROR(EINVAL)
+#ifdef ENODATA
+ || ret == AVERROR(ENODATA)
+#endif
+ ) {
+ tpf = &streamparm.parm.capture.timeperframe;
+ break;
+ }
+ av_log(ctx, 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(ctx, AV_LOG_DEBUG,
+ "Current standard: %s, id: %"PRIx64", 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(ctx, 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(ctx, 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 (v4l2_ioctl(s->fd, VIDIOC_S_PARM, &streamparm) < 0) {
+ ret = AVERROR(errno);
+ av_log(ctx, 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 {
- if (ioctl(s->fd, VIDIOC_G_PARM, &streamparm) != 0) {
- char errbuf[128];
- ret = AVERROR(errno);
- av_strerror(ret, errbuf, sizeof(errbuf));
- av_log(s1, AV_LOG_ERROR, "ioctl(VIDIOC_G_PARM): %s\n",
- errbuf);
- return ret;
+ if (framerate_q.num != tpf->denominator ||
+ framerate_q.den != tpf->numerator) {
+ av_log(ctx, 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(ctx, AV_LOG_WARNING,
+ "The driver does not permit changing the 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});
+ if (tpf->denominator > 0 && tpf->numerator > 0) {
+ ctx->streams[0]->avg_frame_rate.num = tpf->denominator;
+ ctx->streams[0]->avg_frame_rate.den = tpf->numerator;
+ ctx->streams[0]->r_frame_rate = ctx->streams[0]->avg_frame_rate;
+ } else
+ av_log(ctx, AV_LOG_WARNING, "Time per frame unknown\n");
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 *ctx,
+ 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);
-
- if (desired_format == 0 ||
- device_init(s1, width, height, desired_format) < 0) {
- int i;
-
- desired_format = 0;
- 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) {
+ int ret, i;
+
+ *desired_format = ff_fmt_ff2v4l(pix_fmt, ctx->video_codec_id);
+
+ if (*desired_format) {
+ ret = device_init(ctx, width, height, *desired_format);
+ if (ret < 0) {
+ *desired_format = 0;
+ if (ret != AVERROR(EINVAL))
+ return ret;
+ }
+ }
+
+ if (!*desired_format) {
+ for (i = 0; ff_fmt_conversion_table[i].codec_id != AV_CODEC_ID_NONE; i++) {
+ if (ctx->video_codec_id == AV_CODEC_ID_NONE ||
+ ff_fmt_conversion_table[i].codec_id == ctx->video_codec_id) {
+ av_log(ctx, AV_LOG_DEBUG, "Trying to set codec:%s pix_fmt:%s\n",
+ avcodec_get_name(ff_fmt_conversion_table[i].codec_id),
+ (char *)av_x_if_null(av_get_pix_fmt_name(ff_fmt_conversion_table[i].ff_fmt), "none"));
+
+ *desired_format = ff_fmt_conversion_table[i].v4l2_fmt;
+ ret = device_init(ctx, 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(ctx, AV_LOG_ERROR, "Cannot find a proper format for "
+ "codec '%s' (id %d), pixel format '%s' (id %d)\n",
+ avcodec_get_name(ctx->video_codec_id), ctx->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 = ff_fmt_v4l2codec(*desired_format);
+ av_assert0(*codec_id != AV_CODEC_ID_NONE);
+ return ret;
+}
+
+static int v4l2_read_probe(AVProbeData *p)
+{
+ if (av_strstart(p->filename, "/dev/video", NULL))
+ return AVPROBE_SCORE_MAX - 1;
+ return 0;
}
-static int v4l2_read_header(AVFormatContext *s1)
+static int v4l2_read_header(AVFormatContext *ctx)
{
- struct video_data *s = s1->priv_data;
+ struct video_data *s = ctx->priv_data;
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);
+ st = avformat_new_stream(ctx, NULL);
if (!st)
return AVERROR(ENOMEM);
- s->fd = device_open(s1);
+#if CONFIG_LIBV4L2
+ /* silence libv4l2 logging. if fopen() fails v4l2_log_file will be NULL
+ and errors will get sent to stderr */
+ if (s->use_libv4l2)
+ v4l2_log_file = fopen("/dev/null", "w");
+#endif
+
+ s->fd = device_open(ctx);
if (s->fd < 0)
return s->fd;
- if (s->list_format) {
- list_formats(s1, s->fd, s->list_format);
- return AVERROR_EXIT;
+ if (s->channel != -1) {
+ /* set video input */
+ av_log(ctx, 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(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_S_INPUT): %s\n", av_err2str(res));
+ goto fail;
+ }
+ } else {
+ /* get current video input */
+ if (v4l2_ioctl(s->fd, VIDIOC_G_INPUT, &s->channel) < 0) {
+ res = AVERROR(errno);
+ av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_G_INPUT): %s\n", av_err2str(res));
+ goto fail;
+ }
}
- avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
+ /* enum input */
+ input.index = s->channel;
+ if (v4l2_ioctl(s->fd, VIDIOC_ENUMINPUT, &input) < 0) {
+ res = AVERROR(errno);
+ av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_ENUMINPUT): %s\n", av_err2str(res));
+ goto fail;
+ }
+ s->std_id = input.std;
+ av_log(ctx, AV_LOG_DEBUG, "Current input_channel: %d, input_name: %s, input_std: %"PRIx64"\n",
+ s->channel, input.name, (uint64_t)input.std);
- 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_format) {
+ list_formats(ctx, s->list_format);
+ res = AVERROR_EXIT;
+ goto fail;
}
+ if (s->list_standard) {
+ list_standards(ctx);
+ res = AVERROR_EXIT;
+ goto fail;
+ }
+
+ 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);
- if (codec) {
- s1->video_codec_id = codec->id;
- st->need_parsing = AVSTREAM_PARSE_HEADERS;
- }
+ if (codec)
+ ctx->video_codec_id = codec->id;
pix_fmt = av_get_pix_fmt(s->pixel_format);
if (pix_fmt == AV_PIX_FMT_NONE && !codec) {
- av_log(s1, AV_LOG_ERROR, "No such input format: %s.\n",
+ av_log(ctx, AV_LOG_ERROR, "No such input format: %s.\n",
s->pixel_format);
- return AVERROR(EINVAL);
+ res = AVERROR(EINVAL);
+ goto fail;
}
}
if (!s->width && !s->height) {
- struct v4l2_format fmt;
+ struct v4l2_format fmt = { .type = V4L2_BUF_TYPE_VIDEO_CAPTURE };
- av_log(s1, AV_LOG_VERBOSE,
+ av_log(ctx, 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) {
- char errbuf[128];
+ if (v4l2_ioctl(s->fd, VIDIOC_G_FMT, &fmt) < 0) {
res = AVERROR(errno);
- av_strerror(res, errbuf, sizeof(errbuf));
- av_log(s1, AV_LOG_ERROR, "ioctl(VIDIOC_G_FMT): %s\n",
- errbuf);
- return res;
+ av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_G_FMT): %s\n",
+ av_err2str(res));
+ goto fail;
}
s->width = fmt.fmt.pix.width;
s->height = fmt.fmt.pix.height;
- av_log(s1, AV_LOG_VERBOSE,
+ av_log(ctx, AV_LOG_VERBOSE,
"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);
+ res = device_try_init(ctx, pix_fmt, &s->width, &s->height, &desired_format, &codec_id);
+ if (res < 0)
+ goto fail;
- return AVERROR(EIO);
- }
+ /* 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 && ctx->video_codec_id == AV_CODEC_ID_NONE)
+ ctx->video_codec_id = codec_id;
- if ((res = av_image_check_size(s->width, s->height, 0, s1) < 0))
- return res;
+ if ((res = av_image_check_size(s->width, s->height, 0, ctx)) < 0)
+ goto fail;
- s->frame_format = desired_format;
+ s->pixelformat = desired_format;
- if ((res = v4l2_set_parameters(s1) < 0))
- return res;
+ if ((res = v4l2_set_parameters(ctx)) < 0)
+ goto fail;
- st->codecpar->format = fmt_v4l2ff(desired_format, codec_id);
+ st->codecpar->format = ff_fmt_v4l2ff(desired_format, codec_id);
s->frame_size = av_image_get_buffer_size(st->codecpar->format,
s->width, s->height, 1);
- if ((res = mmap_init(s1)) ||
- (res = mmap_start(s1)) < 0) {
- close(s->fd);
- return res;
- }
+ if ((res = mmap_init(ctx)) ||
+ (res = mmap_start(ctx)) < 0)
+ goto fail;
- s->top_field_first = first_field(s->fd);
+ s->top_field_first = first_field(s);
st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
st->codecpar->codec_id = codec_id;
if (codec_id == AV_CODEC_ID_RAWVIDEO)
st->codecpar->codec_tag =
avcodec_pix_fmt_to_codec_tag(st->codecpar->format);
+ else if (codec_id == AV_CODEC_ID_H264) {
+ st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
+ }
+ if (desired_format == V4L2_PIX_FMT_YVU420)
+ st->codecpar->codec_tag = MKTAG('Y', 'V', '1', '2');
+ else if (desired_format == V4L2_PIX_FMT_YVU410)
+ st->codecpar->codec_tag = MKTAG('Y', 'V', 'U', '9');
st->codecpar->width = s->width;
st->codecpar->height = s->height;
- st->codecpar->bit_rate = s->frame_size * av_q2d(st->avg_frame_rate) * 8;
+ if (st->avg_frame_rate.den)
+ st->codecpar->bit_rate = s->frame_size * av_q2d(st->avg_frame_rate) * 8;
return 0;
+
+fail:
+ v4l2_close(s->fd);
+ return res;
}
-static int v4l2_read_packet(AVFormatContext *s1, AVPacket *pkt)
+static int v4l2_read_packet(AVFormatContext *ctx, AVPacket *pkt)
{
- struct video_data *s = s1->priv_data;
+ struct video_data *s = ctx->priv_data;
#if FF_API_CODED_FRAME
FF_DISABLE_DEPRECATION_WARNINGS
- AVFrame *frame = s1->streams[0]->codec->coded_frame;
+ AVFrame *frame = ctx->streams[0]->codec->coded_frame;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
int res;
av_init_packet(pkt);
- if ((res = mmap_read_frame(s1, pkt)) < 0) {
+ if ((res = mmap_read_frame(ctx, pkt)) < 0) {
return res;
}
@@ -878,33 +999,120 @@ FF_ENABLE_DEPRECATION_WARNINGS
return pkt->size;
}
-static int v4l2_read_close(AVFormatContext *s1)
+static int v4l2_read_close(AVFormatContext *ctx)
{
- struct video_data *s = s1->priv_data;
+ struct video_data *s = ctx->priv_data;
if (avpriv_atomic_int_get(&s->buffers_queued) != s->buffers)
- av_log(s1, AV_LOG_WARNING, "Some buffers are still owned by the caller on "
+ av_log(ctx, AV_LOG_WARNING, "Some buffers are still owned by the caller on "
"close.\n");
mmap_close(s);
- close(s->fd);
+ v4l2_close(s->fd);
return 0;
}
+static int v4l2_is_v4l_dev(const char *name)
+{
+ return !strncmp(name, "video", 5) ||
+ !strncmp(name, "radio", 5) ||
+ !strncmp(name, "vbi", 3) ||
+ !strncmp(name, "v4l-subdev", 10);
+}
+
+static int v4l2_get_device_list(AVFormatContext *ctx, AVDeviceInfoList *device_list)
+{
+ struct video_data *s = ctx->priv_data;
+ DIR *dir;
+ struct dirent *entry;
+ AVDeviceInfo *device = NULL;
+ struct v4l2_capability cap;
+ int ret = 0;
+
+ if (!device_list)
+ return AVERROR(EINVAL);
+
+ dir = opendir("/dev");
+ if (!dir) {
+ ret = AVERROR(errno);
+ av_log(ctx, AV_LOG_ERROR, "Couldn't open the directory: %s\n", av_err2str(ret));
+ return ret;
+ }
+ while ((entry = readdir(dir))) {
+ if (!v4l2_is_v4l_dev(entry->d_name))
+ continue;
+
+ snprintf(ctx->filename, sizeof(ctx->filename), "/dev/%s", entry->d_name);
+ if ((s->fd = device_open(ctx)) < 0)
+ continue;
+
+ if (v4l2_ioctl(s->fd, VIDIOC_QUERYCAP, &cap) < 0) {
+ ret = AVERROR(errno);
+ av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QUERYCAP): %s\n", av_err2str(ret));
+ goto fail;
+ }
+
+ device = av_mallocz(sizeof(AVDeviceInfo));
+ if (!device) {
+ ret = AVERROR(ENOMEM);
+ goto fail;
+ }
+ device->device_name = av_strdup(ctx->filename);
+ device->device_description = av_strdup(cap.card);
+ if (!device->device_name || !device->device_description) {
+ ret = AVERROR(ENOMEM);
+ goto fail;
+ }
+
+ if ((ret = av_dynarray_add_nofree(&device_list->devices,
+ &device_list->nb_devices, device)) < 0)
+ goto fail;
+
+ v4l2_close(s->fd);
+ s->fd = -1;
+ continue;
+
+ fail:
+ if (device) {
+ av_freep(&device->device_name);
+ av_freep(&device->device_description);
+ av_freep(&device);
+ }
+ if (s->fd >= 0)
+ v4l2_close(s->fd);
+ s->fd = -1;
+ break;
+ }
+ closedir(dir);
+ return ret;
+}
+
#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 = -1 }, -1, 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" },
+ { "use_libv4l2", "use libv4l2 (v4l-utils) conversion functions", OFFSET(use_libv4l2), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, DEC },
{ NULL },
};
@@ -913,15 +1121,18 @@ static const AVClass v4l2_class = {
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
+ .category = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT,
};
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_probe = v4l2_read_probe,
.read_header = v4l2_read_header,
.read_packet = v4l2_read_packet,
.read_close = v4l2_read_close,
+ .get_device_list = v4l2_get_device_list,
.flags = AVFMT_NOFILE,
.priv_class = &v4l2_class,
};
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-02 08:12:46 +0000