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v4l2: prefer "framerate_q" over "fps" in v4l2_set_parameters() 

The variable is used for containing the parsed value of framerate,
using a lexically consistent name eases readability/understanding.

Signed-off-by: Anton Khirnov <anton@khirnov.net>
This commit is contained in:
Stefano Sabatini 2011-06-03 10:39:54 +02:00 committed by Anton Khirnov
parent a5351720cc
commit e60068baeb
1 changed files with 11 additions and 11 deletions
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22
libavdevice/v4l2.c
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@ -455,11 +455,11 @@ static int v4l2_set_parameters(AVFormatContext *s1, AVFormatParameters *ap)
struct v4l2_streamparm streamparm = { 0 }; struct v4l2_streamparm streamparm = { 0 };
struct v4l2_fract *tpf = &streamparm.parm.capture.timeperframe; struct v4l2_fract *tpf = &streamparm.parm.capture.timeperframe;
int i, ret; int i, ret;
AVRational fps; AVRational framerate_q;
streamparm.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; streamparm.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
if (s->framerate && (ret = av_parse_video_rate(&fps, s->framerate)) < 0) { if (s->framerate && (ret = av_parse_video_rate(&framerate_q, s->framerate)) < 0) {
av_log(s1, AV_LOG_ERROR, "Couldn't parse framerate.\n"); av_log(s1, AV_LOG_ERROR, "Couldn't parse framerate.\n");
return ret; return ret;
} }
@ -467,7 +467,7 @@ static int v4l2_set_parameters(AVFormatContext *s1, AVFormatParameters *ap)
if (ap->channel > 0) if (ap->channel > 0)
s->channel = ap->channel; s->channel = ap->channel;
if (ap->time_base.num) if (ap->time_base.num)
fps = (AVRational){ap->time_base.den, ap->time_base.num}; framerate_q = (AVRational){ap->time_base.den, ap->time_base.num};
#endif #endif
/* set tv video input */ /* set tv video input */
@ -520,23 +520,23 @@ static int v4l2_set_parameters(AVFormatContext *s1, AVFormatParameters *ap)
} }
} }
if (fps.num && fps.den) { if (framerate_q.num && framerate_q.den) {
av_log(s1, AV_LOG_DEBUG, "Setting time per frame to %d/%d\n", av_log(s1, AV_LOG_DEBUG, "Setting time per frame to %d/%d\n",
fps.den, fps.num); framerate_q.den, framerate_q.num);
tpf->numerator = fps.den; tpf->numerator = framerate_q.den;
tpf->denominator = fps.num; tpf->denominator = framerate_q.num;
if (ioctl(s->fd, VIDIOC_S_PARM, &streamparm) != 0) { if (ioctl(s->fd, VIDIOC_S_PARM, &streamparm) != 0) {
av_log(s1, AV_LOG_ERROR, av_log(s1, AV_LOG_ERROR,
"ioctl set time per frame(%d/%d) failed\n", "ioctl set time per frame(%d/%d) failed\n",
fps.den, fps.num); framerate_q.den, framerate_q.num);
return AVERROR(EIO); return AVERROR(EIO);
} }
if (fps.num != tpf->denominator || if (framerate_q.num != tpf->denominator ||
fps.den != tpf->numerator) { framerate_q.den != tpf->numerator) {
av_log(s1, AV_LOG_INFO, 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",
fps.den, fps.num, framerate_q.den, framerate_q.num,
tpf->numerator, tpf->denominator); tpf->numerator, tpf->denominator);
} }
} else { } else {