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lavu/timecode: add av_timecode_check_frame_rate().

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This commit is contained in:
Clément Bœsch
2012-08-03 15:40:15 +02:00
committed by Clément Bœsch
parent 6b3484dcbc
commit 4b365b0868
3 changed files with 27 additions and 10 deletions
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26
libavutil/timecode.c
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@@ -146,6 +146,17 @@ char *av_timecode_make_mpeg_tc_string(char *buf, uint32_t tc25bit)
return buf;
}
static int check_fps(int fps)
{
int i;
static const int supported_fps[] = {24, 25, 30, 50, 60};
for (i = 0; i < FF_ARRAY_ELEMS(supported_fps); i++)
if (fps == supported_fps[i])
return 0;
return -1;
}
static int check_timecode(void *log_ctx, AVTimecode *tc)
{
if (tc->fps <= 0) {
@@ -156,18 +167,12 @@ static int check_timecode(void *log_ctx, AVTimecode *tc)
av_log(log_ctx, AV_LOG_ERROR, "Drop frame is only allowed with 30000/1001 FPS\n");
return AVERROR(EINVAL);
}
switch (tc->fps) {
case 24:
case 25:
case 30:
case 50:
case 60: return 0;
default:
if (check_fps(tc->fps) < 0) {
av_log(log_ctx, AV_LOG_ERROR, "Timecode frame rate %d/%d not supported\n",
tc->rate.num, tc->rate.den);
return AVERROR_PATCHWELCOME;
}
return 0;
}
static int fps_from_frame_rate(AVRational rate)
@@ -177,6 +182,11 @@ static int fps_from_frame_rate(AVRational rate)
return (rate.num + rate.den/2) / rate.den;
}
int av_timecode_check_frame_rate(AVRational rate)
{
return check_fps(fps_from_frame_rate(rate));
}
int av_timecode_init(AVTimecode *tc, AVRational rate, int flags, int frame_start, void *log_ctx)
{
memset(tc, 0, sizeof(*tc));