Commit f5ad81f5 authored by Limin Wang's avatar Limin Wang Committed by Luca Abeni
Browse files

Allow setting v4l2 input and video standard.

Patch by Limin Wang (lance.lmwang AT gmail DOT com)

Originally committed as revision 8542 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent 4992d8bf
......@@ -422,6 +422,57 @@ static void mmap_close(struct video_data *s)
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;
int i;
/* 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_IO;
}
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_IO;
}
av_log(s1, AV_LOG_DEBUG, "The V4L2 driver set standard: %s\n",
ap->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);
return AVERROR_IO;
}
if(!strcasecmp(standard.name, ap->standard)) {
break;
}
}
av_log(s1, AV_LOG_DEBUG, "The V4L2 driver set standard: %s, id: %"PRIu64"\n",
ap->standard, 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);
return AVERROR_IO;
}
return 0;
}
static int v4l2_read_header(AVFormatContext *s1, AVFormatParameters *ap)
{
struct video_data *s = s1->priv_data;
......@@ -494,6 +545,9 @@ static int v4l2_read_header(AVFormatContext *s1, AVFormatParameters *ap)
}
s->frame_format = desired_format;
if( v4l2_set_parameters( s1, ap ) < 0 )
return AVERROR_IO;
st->codec->pix_fmt = fmt_v4l2ff(desired_format);
s->frame_size = avpicture_get_size(st->codec->pix_fmt, width, height);
if (capabilities & V4L2_CAP_STREAMING) {
......
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