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Factorize common code in v4l2_set_parameters(). 

Originally committed as revision 26225 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Stefano Sabatini 2011-01-05 14:15:13 +00:00
parent 8621a37d9f
commit 5d3d238f82
1 changed files with 7 additions and 14 deletions
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19
libavdevice/v4l2.c
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@ -442,8 +442,12 @@ 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_streamparm streamparm = { 0 };
struct v4l2_fract *tpf = &streamparm.parm.capture.timeperframe;
int i;
streamparm.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
if (ap->channel>=0) {
/* set tv video input */
memset (&input, 0, sizeof (input));
@ -490,12 +494,8 @@ static int v4l2_set_parameters(AVFormatContext *s1, AVFormatParameters *ap)
}
if (ap->time_base.num && ap->time_base.den) {
struct v4l2_streamparm streamparm = { 0 };
struct v4l2_fract *tpf = &streamparm.parm.capture.timeperframe;
av_log(s1, AV_LOG_DEBUG, "Setting time per frame to %d/%d\n",
ap->time_base.num, ap->time_base.den);
streamparm.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
tpf->numerator = ap->time_base.num;
tpf->denominator = ap->time_base.den;
if (ioctl(s->fd, VIDIOC_S_PARM, &streamparm) != 0) {
@ -511,23 +511,16 @@ static int v4l2_set_parameters(AVFormatContext *s1, AVFormatParameters *ap)
"The driver changed the time per frame from %d/%d to %d/%d\n",
ap->time_base.num, ap->time_base.den,
tpf->numerator, tpf->denominator);
ap->time_base.num = tpf->numerator;
ap->time_base.den = tpf->denominator;
}
} else {
/* if timebase value is not set in ap, read the timebase value
* from the driver and set it in ap */
struct v4l2_streamparm streamparm = { 0 };
struct v4l2_fract *tpf = &streamparm.parm.capture.timeperframe;
streamparm.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
/* if timebase value is not set in ap, 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);
}
}
ap->time_base.num = tpf->numerator;
ap->time_base.den = tpf->denominator;
}
return 0;
}