* V4L2_PIX_FMT_* and PIX_FMT_*
*
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav 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 FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#endif
#include <time.h>
#include <strings.h>
+#include "libavutil/imgutils.h"
+#include "libavutil/log.h"
+#include "libavutil/opt.h"
+#include "libavutil/parseutils.h"
+#include "libavutil/pixdesc.h"
static const int desired_video_buffers = 256;
};
struct video_data {
+ AVClass *class;
int fd;
int frame_format; /* V4L2_PIX_FMT_* */
enum io_method io_method;
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. */
+ char *framerate; /**< Set by a private option. */
};
struct buff_data {
};
static struct fmt_map fmt_conversion_table[] = {
- {
- .ff_fmt = PIX_FMT_YUV420P,
- .codec_id = CODEC_ID_RAWVIDEO,
- .v4l2_fmt = V4L2_PIX_FMT_YUV420,
- },
- {
- .ff_fmt = PIX_FMT_YUV422P,
- .codec_id = CODEC_ID_RAWVIDEO,
- .v4l2_fmt = V4L2_PIX_FMT_YUV422P,
- },
- {
- .ff_fmt = PIX_FMT_YUYV422,
- .codec_id = CODEC_ID_RAWVIDEO,
- .v4l2_fmt = V4L2_PIX_FMT_YUYV,
- },
- {
- .ff_fmt = PIX_FMT_UYVY422,
- .codec_id = CODEC_ID_RAWVIDEO,
- .v4l2_fmt = V4L2_PIX_FMT_UYVY,
- },
- {
- .ff_fmt = PIX_FMT_YUV411P,
- .codec_id = CODEC_ID_RAWVIDEO,
- .v4l2_fmt = V4L2_PIX_FMT_YUV411P,
- },
- {
- .ff_fmt = PIX_FMT_YUV410P,
- .codec_id = CODEC_ID_RAWVIDEO,
- .v4l2_fmt = V4L2_PIX_FMT_YUV410,
- },
- {
- .ff_fmt = PIX_FMT_RGB555,
- .codec_id = CODEC_ID_RAWVIDEO,
- .v4l2_fmt = V4L2_PIX_FMT_RGB555,
- },
- {
- .ff_fmt = PIX_FMT_RGB565,
- .codec_id = CODEC_ID_RAWVIDEO,
- .v4l2_fmt = V4L2_PIX_FMT_RGB565,
- },
- {
- .ff_fmt = PIX_FMT_BGR24,
- .codec_id = CODEC_ID_RAWVIDEO,
- .v4l2_fmt = V4L2_PIX_FMT_BGR24,
- },
- {
- .ff_fmt = PIX_FMT_RGB24,
- .codec_id = CODEC_ID_RAWVIDEO,
- .v4l2_fmt = V4L2_PIX_FMT_RGB24,
- },
- {
- .ff_fmt = PIX_FMT_BGRA,
- .codec_id = CODEC_ID_RAWVIDEO,
- .v4l2_fmt = V4L2_PIX_FMT_BGR32,
- },
- {
- .ff_fmt = PIX_FMT_GRAY8,
- .codec_id = CODEC_ID_RAWVIDEO,
- .v4l2_fmt = V4L2_PIX_FMT_GREY,
- },
- {
- .ff_fmt = PIX_FMT_NONE,
- .codec_id = CODEC_ID_MJPEG,
- .v4l2_fmt = V4L2_PIX_FMT_MJPEG,
- },
- {
- .ff_fmt = PIX_FMT_NONE,
- .codec_id = CODEC_ID_MJPEG,
- .v4l2_fmt = V4L2_PIX_FMT_JPEG,
- },
+ //ff_fmt codec_id v4l2_fmt
+ { PIX_FMT_YUV420P, CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YUV420 },
+ { PIX_FMT_YUV422P, CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YUV422P },
+ { PIX_FMT_YUYV422, CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YUYV },
+ { PIX_FMT_UYVY422, CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_UYVY },
+ { PIX_FMT_YUV411P, CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YUV411P },
+ { PIX_FMT_YUV410P, CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YUV410 },
+ { PIX_FMT_RGB555, CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_RGB555 },
+ { PIX_FMT_RGB565, CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_RGB565 },
+ { PIX_FMT_BGR24, CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_BGR24 },
+ { PIX_FMT_RGB24, CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_RGB24 },
+ { PIX_FMT_BGRA, CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_BGR32 },
+ { PIX_FMT_GRAY8, CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_GREY },
+ { PIX_FMT_NV12, CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_NV12 },
+ { PIX_FMT_NONE, CODEC_ID_MJPEG, V4L2_PIX_FMT_MJPEG },
+ { PIX_FMT_NONE, CODEC_ID_MJPEG, V4L2_PIX_FMT_JPEG },
};
static int device_open(AVFormatContext *ctx, uint32_t *capabilities)
{
struct v4l2_capability cap;
int fd;
- int res;
+ int res, err;
int flags = O_RDWR;
if (ctx->flags & AVFMT_FLAG_NONBLOCK) {
res = ioctl(fd, VIDIOC_QUERYCAP, &cap);
// ENOIOCTLCMD definition only availble on __KERNEL__
- if (res < 0 && errno == 515)
- {
+ 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(errno);
+ return AVERROR(515);
}
if (res < 0) {
av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QUERYCAP): %s\n",
strerror(errno));
close(fd);
- return AVERROR(errno);
+ return AVERROR(err);
}
if ((cap.capabilities & V4L2_CAP_VIDEO_CAPTURE) == 0) {
av_log(ctx, AV_LOG_ERROR, "Not a video capture device\n");
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 = ioctl(s->fd, VIDIOC_REQBUFS, &req);
if (res < 0) {
if (errno == EINVAL) {
av_log(ctx, AV_LOG_ERROR, "Device does not support mmap\n");
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
buf.index = i;
- res = ioctl (s->fd, VIDIOC_QUERYBUF, &buf);
+ res = ioctl(s->fd, VIDIOC_QUERYBUF, &buf);
if (res < 0) {
av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QUERYBUF)\n");
fd = buf_descriptor->fd;
av_free(buf_descriptor);
- res = ioctl (fd, VIDIOC_QBUF, &buf);
+ res = ioctl(fd, VIDIOC_QBUF, &buf);
if (res < 0) {
- av_log(NULL, AV_LOG_ERROR, "ioctl(VIDIOC_QBUF)\n");
+ av_log(NULL, AV_LOG_ERROR, "ioctl(VIDIOC_QBUF): %s\n", strerror(errno));
}
pkt->data = NULL;
pkt->size = 0;
* 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 = ioctl(s->fd, VIDIOC_QBUF, &buf);
return AVERROR(ENOMEM);
}
buf.memory = V4L2_MEMORY_MMAP;
buf.index = i;
- res = ioctl (s->fd, VIDIOC_QBUF, &buf);
+ res = ioctl(s->fd, VIDIOC_QBUF, &buf);
if (res < 0) {
av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QBUF): %s\n", strerror(errno));
}
type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- res = ioctl (s->fd, VIDIOC_STREAMON, &type);
+ res = ioctl(s->fd, VIDIOC_STREAMON, &type);
if (res < 0) {
av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_STREAMON): %s\n", strerror(errno));
av_free(s->buf_len);
}
-static int v4l2_set_parameters( AVFormatContext *s1, AVFormatParameters *ap )
+static int v4l2_set_parameters(AVFormatContext *s1, AVFormatParameters *ap)
{
struct video_data *s = s1->priv_data;
struct v4l2_input input;
struct v4l2_standard standard;
- int i;
+ struct v4l2_streamparm streamparm = { 0 };
+ struct v4l2_fract *tpf = &streamparm.parm.capture.timeperframe;
+ int i, ret;
+ AVRational fps;
+
+ streamparm.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+ if (s->framerate && (ret = av_parse_video_rate(&fps, s->framerate)) < 0) {
+ av_log(s1, AV_LOG_ERROR, "Couldn't parse framerate.\n");
+ return ret;
+ }
+#if FF_API_FORMAT_PARAMETERS
+ if (ap->channel > 0)
+ s->channel = ap->channel;
+ if (ap->time_base.num)
+ fps = (AVRational){ap->time_base.den, ap->time_base.num};
+#endif
- if(ap->channel>=0) {
- /* set tv video input */
- memset (&input, 0, sizeof (input));
- input.index = ap->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);
- }
+ /* set tv video input */
+ memset (&input, 0, sizeof (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);
+ }
- av_log(s1, AV_LOG_DEBUG, "The V4L2 driver set input_id: %d, input: %s\n",
- ap->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",
- ap->channel);
- 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",
+ s->channel);
+ return AVERROR(EIO);
+ }
+
+#if FF_API_FORMAT_PARAMETERS
+ if (ap->standard) {
+ av_freep(&s->standard);
+ s->standard = av_strdup(ap->standard);
}
+#endif
- if(ap->standard) {
+ if (s->standard) {
av_log(s1, AV_LOG_DEBUG, "The V4L2 driver set standard: %s\n",
- ap->standard );
+ 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",
- ap->standard);
+ s->standard);
return AVERROR(EIO);
}
- if(!strcasecmp(standard.name, ap->standard)) {
+ if (!strcasecmp(standard.name, s->standard)) {
break;
}
}
av_log(s1, AV_LOG_DEBUG, "The V4L2 driver set standard: %s, id: %"PRIu64"\n",
- ap->standard, (uint64_t)standard.id);
+ 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",
- ap->standard);
+ s->standard);
return AVERROR(EIO);
}
}
+ if (fps.num && fps.den) {
+ av_log(s1, AV_LOG_DEBUG, "Setting time per frame to %d/%d\n",
+ fps.den, fps.num);
+ tpf->numerator = fps.den;
+ tpf->denominator = fps.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",
+ fps.den, fps.num);
+ return AVERROR(EIO);
+ }
+
+ if (fps.num != tpf->denominator ||
+ fps.den != tpf->numerator) {
+ av_log(s1, AV_LOG_INFO,
+ "The driver changed the time per frame from %d/%d to %d/%d\n",
+ fps.den, fps.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));
+ return AVERROR(errno);
+ }
+ }
+ s1->streams[0]->codec->time_base.den = tpf->denominator;
+ s1->streams[0]->codec->time_base.num = tpf->numerator;
+
return 0;
}
static uint32_t device_try_init(AVFormatContext *s1,
- const AVFormatParameters *ap,
+ enum PixelFormat pix_fmt,
int *width,
int *height,
enum CodecID *codec_id)
{
- uint32_t desired_format = fmt_ff2v4l(ap->pix_fmt, s1->video_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) {
{
struct video_data *s = s1->priv_data;
AVStream *st;
- int res;
+ int res = 0;
uint32_t desired_format, capabilities;
enum CodecID codec_id;
-
- if (ap->width <= 0 || ap->height <= 0) {
- av_log(s1, AV_LOG_ERROR, "Wrong size (%dx%d)\n", ap->width, ap->height);
- return AVERROR(EINVAL);
- }
-
- if(avcodec_check_dimensions(s1, ap->width, ap->height) < 0)
- return AVERROR(EINVAL);
+ enum PixelFormat pix_fmt = PIX_FMT_NONE;
st = av_new_stream(s1, 0);
if (!st) {
- return AVERROR(ENOMEM);
+ res = AVERROR(ENOMEM);
+ goto out;
}
av_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
- s->width = ap->width;
- s->height = ap->height;
+ if (s->video_size && (res = av_parse_video_size(&s->width, &s->height, s->video_size)) < 0) {
+ av_log(s1, AV_LOG_ERROR, "Couldn't parse video size.\n");
+ 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);
+ goto out;
+ }
+#if FF_API_FORMAT_PARAMETERS
+ if (ap->width > 0)
+ s->width = ap->width;
+ if (ap->height > 0)
+ s->height = ap->height;
+ if (ap->pix_fmt)
+ pix_fmt = ap->pix_fmt;
+#endif
capabilities = 0;
s->fd = device_open(s1, &capabilities);
if (s->fd < 0) {
- return AVERROR(EIO);
+ res = AVERROR(EIO);
+ goto out;
+ }
+ av_log(s1, AV_LOG_VERBOSE, "[%d]Capabilities: %x\n", s->fd, capabilities);
+
+ if (!s->width && !s->height) {
+ struct v4l2_format fmt;
+
+ 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));
+ 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_INFO, "[%d]Capabilities: %x\n", s->fd, capabilities);
- desired_format = device_try_init(s1, ap, &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, ap->pix_fmt);
+ "codec_id %d, pix_fmt %d.\n", s1->video_codec_id, pix_fmt);
close(s->fd);
- return AVERROR(EIO);
+ res = AVERROR(EIO);
+ goto out;
}
+ if ((res = av_image_check_size(s->width, s->height, 0, s1) < 0))
+ goto out;
s->frame_format = desired_format;
- if( v4l2_set_parameters( s1, ap ) < 0 )
- return AVERROR(EIO);
+ 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 (res < 0) {
close(s->fd);
- return AVERROR(EIO);
+ res = AVERROR(EIO);
+ goto out;
}
s->top_field_first = first_field(s->fd);
st->codec->codec_id = codec_id;
st->codec->width = s->width;
st->codec->height = s->height;
- st->codec->time_base.den = ap->time_base.den;
- st->codec->time_base.num = ap->time_base.num;
st->codec->bit_rate = s->frame_size * 1/av_q2d(st->codec->time_base) * 8;
- return 0;
+out:
+ av_freep(&s->video_size);
+ av_freep(&s->pixel_format);
+ av_freep(&s->standard);
+ av_freep(&s->framerate);
+ return res;
}
static int v4l2_read_packet(AVFormatContext *s1, AVPacket *pkt)
return 0;
}
-AVInputFormat v4l2_demuxer = {
+#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), FF_OPT_TYPE_STRING, {.str = "NTSC" }, 0, 0, AV_OPT_FLAG_DECODING_PARAM },
+ { "channel", "", offsetof(struct video_data, channel), FF_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), FF_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
+ { "pixel_format", "", OFFSET(pixel_format), FF_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
+ { "framerate", "", OFFSET(framerate), FF_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
+ { NULL },
+};
+
+static const AVClass v4l2_class = {
+ .class_name = "V4L2 indev",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
+AVInputFormat ff_v4l2_demuxer = {
"video4linux2",
NULL_IF_CONFIG_SMALL("Video4Linux2 device grab"),
sizeof(struct video_data),
v4l2_read_packet,
v4l2_read_close,
.flags = AVFMT_NOFILE,
+ .priv_class = &v4l2_class,
};
projects / ffmpeg / blobdiff