-/**
- * This function will (un)pause the display of pictures.
- * It is thread safe
- */
-void vout_ChangePause( vout_thread_t *, bool b_paused, mtime_t i_date );
-
-/**
- * This function will apply an offset on subtitle subpicture.
- */
-void spu_OffsetSubtitleDate( spu_t *p_spu, mtime_t i_duration );
-
-/**
- * This function will return and reset internal statistics.
- */
-void vout_GetResetStatistic( vout_thread_t *p_vout, int *pi_displayed, int *pi_lost );
-
-/**
- * This function will ensure that all ready/displayed pciture have at most
- * the provided dat
+/* DO NOT use vout_UsePictureLocked unless you are in src/video_ouput
+ *
+ * This function supposes that you call it with picture_lock taken.