+ if (((is->av_sync_type == AV_SYNC_AUDIO_MASTER && is->audio_st) || is->av_sync_type == AV_SYNC_EXTERNAL_CLOCK) &&
+ (framedrop>0 || (framedrop && is->audio_st))) {
+ SDL_LockMutex(is->pictq_mutex);
+ if (is->frame_last_pts != AV_NOPTS_VALUE && *pts) {
+ double clockdiff = get_video_clock(is) - get_master_clock(is);
+ double dpts = av_q2d(is->video_st->time_base) * *pts;
+ double ptsdiff = dpts - is->frame_last_pts;
+ if (fabs(clockdiff) < AV_NOSYNC_THRESHOLD &&
+ ptsdiff > 0 && ptsdiff < AV_NOSYNC_THRESHOLD &&
+ clockdiff + ptsdiff - is->frame_last_filter_delay < 0) {
+ is->frame_last_dropped_pos = pkt->pos;
+ is->frame_last_dropped_pts = dpts;
+ is->frame_drops_early++;
+ ret = 0;
+ }
+ }
+ SDL_UnlockMutex(is->pictq_mutex);
+ }
+
+ if (ret)
+ is->frame_last_returned_time = av_gettime() / 1000000.0;