#include "timecode.h"
#include "libavutil/log.h"
-int ff_framenum_to_drop_timecode(int frame_num)
+int avpriv_framenum_to_drop_timecode(int frame_num)
{
/* only works for NTSC 29.97 */
int d = frame_num / 17982;
return frame_num + 18 * d + 2 * ((m - 2) / 1798);
}
-uint32_t ff_framenum_to_smtpe_timecode(unsigned frame, int fps, int drop)
+uint32_t avpriv_framenum_to_smpte_timecode(unsigned frame, int fps, int drop)
{
return (0 << 31) | // color frame flag
(drop << 30) | // drop frame flag
( (frame / (fps * 3600) % 24)) % 10; // units of hours
}
-int ff_init_smtpe_timecode(void *avcl, struct ff_timecode *tc)
+int avpriv_check_timecode_rate(void *avcl, AVRational rate, int drop)
+{
+ int fps;
+
+ if (!rate.num || !rate.den) {
+ av_log(avcl, AV_LOG_ERROR, "Timecode frame rate must be specified\n");
+ return -1;
+ }
+ fps = (rate.num + rate.den/2) / rate.den;
+ if (drop && fps != 30) {
+ av_log(avcl, AV_LOG_ERROR, "Drop frame is only allowed with 30000/1001 FPS\n");
+ return -2;
+ }
+ switch (fps) {
+ case 24:
+ case 25:
+ case 30: return 0;
+
+ default:
+ av_log(avcl, AV_LOG_ERROR, "Timecode frame rate not supported\n");
+ return -3;
+ }
+}
+
+char *avpriv_timecode_to_string(char *buf, const struct ff_timecode *tc, unsigned frame)
+{
+ int frame_num = tc->start + frame;
+ int fps = (tc->rate.num + tc->rate.den/2) / tc->rate.den;
+ 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);
+ snprintf(buf, 16, "%s%02d:%02d:%02d%c%02d",
+ neg ? "-" : "",
+ hh, mm, ss, tc->drop ? ';' : ':', ff);
+ return buf;
+}
+
+int avpriv_init_smpte_timecode(void *avcl, struct ff_timecode *tc)
{
- int hh, mm, ss, ff, fps;
+ int hh, mm, ss, ff, fps, ret;
char c;
if (sscanf(tc->str, "%d:%d:%d%c%d", &hh, &mm, &ss, &c, &ff) != 5) {
return -1;
}
+ tc->drop = c != ':'; // drop if ';', '.', ...
+
+ ret = avpriv_check_timecode_rate(avcl, tc->rate, tc->drop);
+ if (ret < 0)
+ return ret;
+
fps = (tc->rate.num + tc->rate.den/2) / tc->rate.den;
tc->start = (hh*3600 + mm*60 + ss) * fps + ff;
- tc->drop = c != ':'; // drop if ';', '.', ...
if (tc->drop) { /* adjust frame number */
int tmins = 60*hh + mm;
- if (tc->rate.den != 1001 || fps != 30) {
- av_log(avcl, AV_LOG_ERROR, "error: drop frame is only allowed with"
- "30000/1001 FPS");
- return -2;
- }
tc->start -= 2 * (tmins - tmins/10);
}
return 0;
}
+
+#if FF_API_OLD_TIMECODE
+int ff_framenum_to_drop_timecode(int frame_num)
+{
+ return avpriv_framenum_to_drop_timecode(frame_num);
+}
+
+uint32_t ff_framenum_to_smtpe_timecode(unsigned frame, int fps, int drop)
+{
+ return avpriv_framenum_to_smpte_timecode(frame, fps, drop);
+}
+
+int ff_init_smtpe_timecode(void *avcl, struct ff_timecode *tc)
+{
+ return avpriv_init_smpte_timecode(avcl, tc);
+}
+#endif