+ return AV_SYNC_EXTERNAL_CLOCK;
+ }
+}
+
+/* get the current master clock value */
+static double get_master_clock(VideoState *is)
+{
+ double val;
+
+ switch (get_master_sync_type(is)) {
+ case AV_SYNC_VIDEO_MASTER:
+ val = get_video_clock(is);
+ break;
+ case AV_SYNC_AUDIO_MASTER:
+ val = get_audio_clock(is);
+ break;
+ default:
+ val = get_external_clock(is);
+ break;