decoder: add decoder_AbortPictures

include/vlc_codec.h

@@ -245,6 +245,16 @@ static inline picture_t *decoder_NewPicture( decoder_t *dec )
     return decoder_GetPicture( dec );
 }
 
+/**
+ * Abort any calls of decoder_NewPicture / decoder_GetPicture
+ *
+ * If b_abort is true, all pending and futures calls of decoder_NewPicture /
+ * decoder_GetPicture will be aborted. This function can be used by
+ * asynchronous video decoders to unblock a thread that is waiting for a
+ * picture.
+ */
+VLC_API void decoder_AbortPictures( decoder_t *dec, bool b_abort );
+
 /**
  * This function queues a picture to the video output.
  *

src/input/decoder.c

@@ -593,6 +593,16 @@ int decoder_GetDisplayRate( decoder_t *p_dec )
     return p_dec->pf_get_display_rate( p_dec );
 }
 
+void decoder_AbortPictures( decoder_t *p_dec, bool b_abort )
+{
+    decoder_owner_sys_t *p_owner = p_dec->p_owner;
+
+    vlc_mutex_lock( &p_owner->lock );
+    if( p_owner->p_vout != NULL )
+        vout_Cancel( p_owner->p_vout, b_abort );
+    vlc_mutex_unlock( &p_owner->lock );
+}
+
 static void DecoderWaitUnblock( decoder_t *p_dec )
 {
     decoder_owner_sys_t *p_owner = p_dec->p_owner;

src/libvlccore.sym

@@ -73,6 +73,7 @@ date_Increment
 date_Init
 date_Move
 date_Set
+decoder_AbortPictures
 decoder_GetDisplayDate
 decoder_GetDisplayRate
 decoder_GetInputAttachments