/*
- * 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 PIX_FMT_*
- *
- *
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * 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 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 <time.h>
#include "libavutil/imgutils.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"
+#include "avdevice.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;
-enum io_method {
- io_read,
- io_mmap,
- io_userptr
-};
+#define V4L_ALLFORMATS 3
+#define V4L_RAWFORMATS 1
+#define V4L_COMPFORMATS 2
struct video_data {
AVClass *class;
int fd;
int frame_format; /* V4L2_PIX_FMT_* */
- enum io_method io_method;
int width, height;
int frame_size;
+ int timeout;
+ int interlaced;
int top_field_first;
int buffers;
unsigned int *buf_len;
char *standard;
int channel;
- char *video_size; /**< String describing video size, set by a private option. */
+ 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. */
};
{ PIX_FMT_NONE, CODEC_ID_MJPEG, V4L2_PIX_FMT_JPEG },
};
-static int device_open(AVFormatContext *ctx, uint32_t *capabilities)
+static int device_open(AVFormatContext *ctx)
{
struct v4l2_capability cap;
int fd;
+#if CONFIG_LIBV4L2
+ int fd_libv4l;
+#endif
int res, err;
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(errno));
+ ctx->filename, strerror(err));
- return AVERROR(errno);
+ return AVERROR(err);
}
-
- res = ioctl(fd, VIDIOC_QUERYCAP, &cap);
- // ENOIOCTLCMD definition only availble on __KERNEL__
- if (res < 0 && ((err = errno) == 515)) {
- av_log(ctx, AV_LOG_ERROR, "QUERYCAP not implemented, probably V4L device but not supporting V4L2\n");
- close(fd);
-
- return AVERROR(515);
+#if CONFIG_LIBV4L2
+ fd_libv4l = v4l2_fd_open(fd, 0);
+ if (fd < 0) {
+ err = AVERROR(errno);
+ av_log(ctx, AV_LOG_ERROR, "Cannot open video device with libv4l neither %s : %s\n",
+ ctx->filename, strerror(errno));
+ return err;
}
+ fd = fd_libv4l;
+#endif
+
+ res = v4l2_ioctl(fd, VIDIOC_QUERYCAP, &cap);
if (res < 0) {
+ err = errno;
av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QUERYCAP): %s\n",
- strerror(errno));
- close(fd);
+ strerror(err));
- return AVERROR(err);
+ goto fail;
+ }
+
+ av_log(ctx, AV_LOG_VERBOSE, "[%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;
+
+ goto fail;
}
- if ((cap.capabilities & V4L2_CAP_VIDEO_CAPTURE) == 0) {
- av_log(ctx, AV_LOG_ERROR, "Not a video capture device\n");
- close(fd);
- return AVERROR(ENODEV);
+ 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;
+
+ goto fail;
}
- *capabilities = cap.capabilities;
return fd;
+
+fail:
+ v4l2_close(fd);
+ return AVERROR(err);
}
-static int device_init(AVFormatContext *ctx, int *width, int *height, uint32_t pix_fmt)
+static int device_init(AVFormatContext *ctx, int *width, int *height,
+ uint32_t pix_fmt)
{
struct video_data *s = ctx->priv_data;
int fd = s->fd;
- struct v4l2_format fmt;
+ struct v4l2_format fmt = { .type = V4L2_BUF_TYPE_VIDEO_CAPTURE };
+ struct v4l2_pix_format *pix = &fmt.fmt.pix;
+
int res;
- memset(&fmt, 0, sizeof(struct v4l2_format));
- fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- fmt.fmt.pix.width = *width;
- fmt.fmt.pix.height = *height;
- fmt.fmt.pix.pixelformat = pix_fmt;
- fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;
- res = ioctl(fd, VIDIOC_S_FMT, &fmt);
+ pix->width = *width;
+ pix->height = *height;
+ pix->pixelformat = pix_fmt;
+ pix->field = V4L2_FIELD_ANY;
+
+ 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, "The V4L2 driver changed the video from %dx%d to %dx%d\n", *width, *height, fmt.fmt.pix.width, fmt.fmt.pix.height);
+ av_log(ctx, AV_LOG_INFO,
+ "The V4L2 driver changed the video from %dx%d to %dx%d\n",
+ *width, *height, fmt.fmt.pix.width, fmt.fmt.pix.height);
*width = fmt.fmt.pix.width;
*height = fmt.fmt.pix.height;
}
if (pix_fmt != 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);
+ 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;
}
+ if (fmt.fmt.pix.field == V4L2_FIELD_INTERLACED) {
+ av_log(ctx, AV_LOG_DEBUG, "The V4L2 driver using the interlaced mode");
+ s->interlaced = 1;
+ }
+
return res;
}
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;
}
return CODEC_ID_NONE;
}
+#if HAVE_STRUCT_V4L2_FRMIVALENUM_DISCRETE
+static void list_framesizes(AVFormatContext *ctx, int fd, uint32_t pixelformat)
+{
+ struct v4l2_frmsizeenum vfse = { .pixel_format = pixelformat };
+
+ while(!ioctl(fd, VIDIOC_ENUM_FRAMESIZES, &vfse)) {
+ switch (vfse.type) {
+ case V4L2_FRMSIZE_TYPE_DISCRETE:
+ av_log(ctx, AV_LOG_INFO, " %ux%u",
+ vfse.discrete.width, vfse.discrete.height);
+ break;
+ case V4L2_FRMSIZE_TYPE_CONTINUOUS:
+ case V4L2_FRMSIZE_TYPE_STEPWISE:
+ av_log(ctx, AV_LOG_INFO, " {%u-%u, %u}x{%u-%u, %u}",
+ vfse.stepwise.min_width,
+ vfse.stepwise.max_width,
+ vfse.stepwise.step_width,
+ vfse.stepwise.min_height,
+ vfse.stepwise.max_height,
+ vfse.stepwise.step_height);
+ }
+ vfse.index++;
+ }
+}
+#endif
+
+static void list_formats(AVFormatContext *ctx, int fd, int type)
+{
+ struct v4l2_fmtdesc vfd = { .type = V4L2_BUF_TYPE_VIDEO_CAPTURE };
+
+ while(!ioctl(fd, VIDIOC_ENUM_FMT, &vfd)) {
+ enum CodecID codec_id = fmt_v4l2codec(vfd.pixelformat);
+ enum PixelFormat pix_fmt = 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 :",
+ 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 :",
+ codec ? codec->name : "Unsupported",
+ vfd.description);
+ } else {
+ continue;
+ }
+
+#ifdef V4L2_FMT_FLAG_EMULATED
+ if (vfd.flags & V4L2_FMT_FLAG_EMULATED) {
+ av_log(ctx, AV_LOG_WARNING, "%s", "Emulated");
+ continue;
+ }
+#endif
+#if HAVE_STRUCT_V4L2_FRMIVALENUM_DISCRETE
+ list_framesizes(ctx, fd, vfd.pixelformat);
+#endif
+ av_log(ctx, AV_LOG_INFO, "\n");
+ }
+}
+
static int mmap_init(AVFormatContext *ctx)
{
- struct video_data *s = ctx->priv_data;
- struct v4l2_requestbuffers req;
int i, res;
+ struct video_data *s = ctx->priv_data;
+ struct v4l2_requestbuffers req = {
+ .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
+ .count = desired_video_buffers,
+ .memory = V4L2_MEMORY_MMAP
+ };
- memset(&req, 0, sizeof(struct v4l2_requestbuffers));
- req.count = desired_video_buffers;
- req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- req.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);
}
for (i = 0; i < req.count; i++) {
- struct v4l2_buffer buf;
-
- memset(&buf, 0, sizeof(struct v4l2_buffer));
- buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- buf.memory = V4L2_MEMORY_MMAP;
- buf.index = i;
- res = ioctl(s->fd, VIDIOC_QUERYBUF, &buf);
+ struct v4l2_buffer buf = {
+ .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
+ .index = i,
+ .memory = V4L2_MEMORY_MMAP
+ };
+ res = v4l2_ioctl(s->fd, VIDIOC_QUERYBUF, &buf);
if (res < 0) {
av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QUERYBUF)\n");
-
return AVERROR(errno);
}
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", i, s->buf_len[i], s->frame_size);
+ av_log(ctx, AV_LOG_ERROR,
+ "Buffer len [%d] = %d != %d\n",
+ i, s->buf_len[i], s->frame_size);
return -1;
}
- s->buf_start[i] = mmap (NULL, buf.length,
- PROT_READ | PROT_WRITE, MAP_SHARED, s->fd, buf.m.offset);
+ 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);
}
}
return 0;
}
-static int read_init(AVFormatContext *ctx)
-{
- return -1;
-}
-
static void mmap_release_buffer(AVPacket *pkt)
{
- struct v4l2_buffer buf;
+ struct v4l2_buffer buf = { 0 };
int res, fd;
struct buff_data *buf_descriptor = pkt->priv;
- if (pkt->data == NULL) {
- return;
- }
+ if (pkt->data == NULL)
+ return;
- memset(&buf, 0, sizeof(struct v4l2_buffer));
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_log(NULL, AV_LOG_ERROR, "ioctl(VIDIOC_QBUF): %s\n", strerror(errno));
- }
+ res = v4l2_ioctl(fd, VIDIOC_QBUF, &buf);
+ if (res < 0)
+ av_log(NULL, AV_LOG_ERROR, "ioctl(VIDIOC_QBUF): %s\n",
+ strerror(errno));
+
pkt->data = NULL;
pkt->size = 0;
}
static int mmap_read_frame(AVFormatContext *ctx, AVPacket *pkt)
{
struct video_data *s = ctx->priv_data;
- struct v4l2_buffer buf;
+ struct v4l2_buffer buf = {
+ .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
+ .memory = V4L2_MEMORY_MMAP
+ };
struct buff_data *buf_descriptor;
+ struct pollfd p = { .fd = s->fd, .events = POLLIN };
int res;
- memset(&buf, 0, sizeof(struct v4l2_buffer));
- buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- buf.memory = V4L2_MEMORY_MMAP;
+ 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));
+ av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_DQBUF): %s\n",
+ strerror(errno));
return AVERROR(errno);
}
- assert (buf.index < s->buffers);
+ assert(buf.index < s->buffers);
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);
+ 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;
}
* 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);
}
return s->buf_len[buf.index];
}
-static int read_frame(AVFormatContext *ctx, AVPacket *pkt)
-{
- return -1;
-}
-
static int mmap_start(AVFormatContext *ctx)
{
struct video_data *s = ctx->priv_data;
int i, res;
for (i = 0; i < s->buffers; i++) {
- struct v4l2_buffer buf;
-
- memset(&buf, 0, sizeof(struct v4l2_buffer));
- buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- buf.memory = V4L2_MEMORY_MMAP;
- buf.index = i;
+ struct v4l2_buffer buf = {
+ .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
+ .index = i,
+ .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));
+ av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QBUF): %s\n",
+ strerror(errno));
return AVERROR(errno);
}
}
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));
+ av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_STREAMON): %s\n",
+ strerror(errno));
return AVERROR(errno);
}
/* 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);
static int v4l2_set_parameters(AVFormatContext *s1, AVFormatParameters *ap)
{
struct video_data *s = s1->priv_data;
- struct v4l2_input input;
- struct v4l2_standard standard;
+ struct v4l2_input input = { 0 };
+ struct v4l2_standard standard = { 0 };
struct v4l2_streamparm streamparm = { 0 };
struct v4l2_fract *tpf = &streamparm.parm.capture.timeperframe;
+ AVRational framerate_q = { 0 };
int i, ret;
- AVRational framerate_q;
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", s->framerate);
+ 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",
+ s->framerate);
return ret;
}
/* set tv video input */
- memset (&input, 0, sizeof (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) {
- av_log(s1, AV_LOG_ERROR, "The V4L2 driver ioctl set input(%d) failed\n",
+ 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);
return AVERROR(EIO);
}
av_log(s1, AV_LOG_DEBUG, "The V4L2 driver set standard: %s\n",
s->standard);
/* set tv standard */
- memset (&standard, 0, sizeof (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",
+ 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",
+ 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);
return AVERROR(EIO);
}
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) {
+
+ 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);
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",
+ "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 timebase value is not set, read the timebase value from the driver */
- if (ioctl(s->fd, VIDIOC_G_PARM, &streamparm) != 0) {
- av_log(s1, AV_LOG_ERROR, "ioctl(VIDIOC_G_PARM): %s\n", strerror(errno));
+ 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);
}
}
s1->streams[0]->codec->time_base.den = tpf->denominator;
s1->streams[0]->codec->time_base.num = tpf->numerator;
+ s->timeout = 100 +
+ av_rescale_q(1, s1->streams[0]->codec->time_base,
+ (AVRational){1, 1000});
+
return 0;
}
}
}
}
+
if (desired_format != 0) {
*codec_id = fmt_v4l2codec(desired_format);
assert(*codec_id != CODEC_ID_NONE);
struct video_data *s = s1->priv_data;
AVStream *st;
int res = 0;
- uint32_t desired_format, capabilities;
+ uint32_t desired_format;
enum CodecID codec_id;
enum PixelFormat pix_fmt = PIX_FMT_NONE;
res = AVERROR(ENOMEM);
goto out;
}
- av_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);
+ s->fd = device_open(s1);
+ if (s->fd < 0) {
+ res = s->fd;
goto out;
}
- if (s->pixel_format && (pix_fmt = av_get_pix_fmt(s->pixel_format)) == PIX_FMT_NONE) {
- av_log(s1, AV_LOG_ERROR, "No such pixel format: %s.\n", s->pixel_format);
- res = AVERROR(EINVAL);
+
+ if (s->list_format) {
+ list_formats(s1, s->fd, s->list_format);
+ res = AVERROR_EXIT;
goto out;
}
- capabilities = 0;
- s->fd = device_open(s1, &capabilities);
- if (s->fd < 0) {
- res = AVERROR(EIO);
+ 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);
goto out;
}
- av_log(s1, AV_LOG_VERBOSE, "[%d]Capabilities: %x\n", s->fd, capabilities);
+
+ if (s->pixel_format) {
+ AVCodec *codec = avcodec_find_decoder_by_name(s->pixel_format);
+
+ if (codec)
+ s1->video_codec_id = codec->id;
+
+ pix_fmt = av_get_pix_fmt(s->pixel_format);
+
+ if (pix_fmt == PIX_FMT_NONE && !codec) {
+ av_log(s1, AV_LOG_ERROR, "No such input format: %s.\n",
+ s->pixel_format);
+
+ res = AVERROR(EINVAL);
+ goto out;
+ }
+ }
if (!s->width && !s->height) {
struct v4l2_format fmt;
- av_log(s1, AV_LOG_VERBOSE, "Querying the device for the current frame size\n");
+ 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));
+ if (v4l2_ioctl(s->fd, VIDIOC_G_FMT, &fmt) < 0) {
+ av_log(s1, AV_LOG_ERROR, "ioctl(VIDIOC_G_FMT): %s\n",
+ strerror(errno));
res = AVERROR(errno);
goto out;
}
+
s->width = fmt.fmt.pix.width;
s->height = fmt.fmt.pix.height;
- av_log(s1, AV_LOG_VERBOSE, "Setting frame size to %dx%d\n", s->width, s->height);
+ av_log(s1, 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);
+ 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);
+ v4l2_close(s->fd);
res = AVERROR(EIO);
goto out;
}
- 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)
goto out;
+
s->frame_format = desired_format;
- if ((res = v4l2_set_parameters(s1, ap) < 0))
+ if ((res = v4l2_set_parameters(s1, ap)) < 0)
goto out;
st->codec->pix_fmt = fmt_v4l2ff(desired_format, codec_id);
- s->frame_size = avpicture_get_size(st->codec->pix_fmt, s->width, s->height);
- if (capabilities & V4L2_CAP_STREAMING) {
- s->io_method = io_mmap;
- res = mmap_init(s1);
- if (res == 0) {
- res = mmap_start(s1);
- }
- } else {
- s->io_method = io_read;
- res = read_init(s1);
- }
- if (res < 0) {
- close(s->fd);
+ s->frame_size =
+ avpicture_get_size(st->codec->pix_fmt, s->width, s->height);
- res = AVERROR(EIO);
+ if ((res = mmap_init(s1)) ||
+ (res = mmap_start(s1)) < 0) {
+ v4l2_close(s->fd);
goto out;
}
+
s->top_field_first = first_field(s->fd);
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
st->codec->codec_id = codec_id;
+ if (codec_id == CODEC_ID_RAWVIDEO)
+ st->codec->codec_tag =
+ avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
st->codec->width = s->width;
st->codec->height = s->height;
st->codec->bit_rate = s->frame_size * 1/av_q2d(st->codec->time_base) * 8;
static int v4l2_read_packet(AVFormatContext *s1, AVPacket *pkt)
{
struct video_data *s = s1->priv_data;
+ AVFrame *frame = s1->streams[0]->codec->coded_frame;
int res;
- if (s->io_method == io_mmap) {
- av_init_packet(pkt);
- res = mmap_read_frame(s1, pkt);
- } else if (s->io_method == io_read) {
- if (av_new_packet(pkt, s->frame_size) < 0)
- return AVERROR(EIO);
-
- res = read_frame(s1, pkt);
- } else {
- return AVERROR(EIO);
- }
- if (res < 0) {
+ av_init_packet(pkt);
+ if ((res = mmap_read_frame(s1, pkt)) < 0) {
return res;
}
- if (s1->streams[0]->codec->coded_frame) {
- s1->streams[0]->codec->coded_frame->interlaced_frame = 1;
- s1->streams[0]->codec->coded_frame->top_field_first = s->top_field_first;
+ if (frame && s->interlaced) {
+ frame->interlaced_frame = 1;
+ frame->top_field_first = s->top_field_first;
}
return pkt->size;
{
struct video_data *s = s1->priv_data;
- if (s->io_method == io_mmap) {
- mmap_close(s);
- }
+ 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", "", offsetof(struct video_data, standard), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, AV_OPT_FLAG_DECODING_PARAM },
- { "channel", "", offsetof(struct video_data, channel), AV_OPT_TYPE_INT, {.dbl = 0 }, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
- { "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", "", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
- { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
+ { "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, {.dbl = 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, {.dbl = 0 }, 0, INT_MAX, DEC, "list_formats" },
+ { "all", "Show all available formats", OFFSET(list_format), AV_OPT_TYPE_CONST, {.dbl = V4L_ALLFORMATS }, 0, INT_MAX, DEC, "list_formats" },
+ { "raw", "Show only non-compressed formats", OFFSET(list_format), AV_OPT_TYPE_CONST, {.dbl = V4L_RAWFORMATS }, 0, INT_MAX, DEC, "list_formats" },
+ { "compressed", "Show only compressed formats", OFFSET(list_format), AV_OPT_TYPE_CONST, {.dbl = V4L_COMPFORMATS }, 0, INT_MAX, DEC, "list_formats" },
{ NULL },
};
};
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,
projects / ffmpeg / blobdiff