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timecode: string representation can be negative.

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Timecode can be specified with a negative value in MOV...
This commit is contained in:
Clément Bœsch 2012-01-04 17:06:39 +01:00 committed by Clément Bœsch
parent 98aafc5bbf
commit f1db99166b
2 changed files with 8 additions and 2 deletions
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9
libavcodec/timecode.c
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@ -83,15 +83,20 @@ char *avpriv_timecode_to_string(char *buf, const struct ff_timecode *tc, unsigne
{
int frame_num = tc->start + frame;
int fps = (tc->rate.num + tc->rate.den/2) / tc->rate.den;
int hh, mm, ss, ff;
int hh, mm, ss, ff, neg = 0;
if (tc->drop)
frame_num = avpriv_framenum_to_drop_timecode(frame_num);
if (frame_num < 0) {
frame_num = -frame_num;
neg = 1;
}
ff = frame_num % fps;
ss = frame_num / fps % 60;
mm = frame_num / (fps*60) % 60;
hh = frame_num / (fps*3600) % 24;
snprintf(buf, 16, "%02d:%02d:%02d%c%02d",
snprintf(buf, 16, "%s%02d:%02d:%02d%c%02d",
neg ? "-" : "",
hh, mm, ss, tc->drop ? ';' : ':', ff);
return buf;
}

1
libavcodec/timecode.h
View File

@ -67,6 +67,7 @@ uint32_t avpriv_framenum_to_smpte_timecode(unsigned frame, int fps, int drop);
* @param tc Timecode struct pointer
* @param frame Frame id (timecode frame is computed with tc->start+frame)
* @return a pointer to the buf parameter
* @note timecode representation can be a negative timecode
* @note buf must have enough space to store the timecode representation: 16
* bytes is the minimum required size.
*/