+/**
+ * This function will return a new picture usable by p_filter as an output
+ * buffer. You have to release it using filter_DeletePicture or by returning
+ * it to the caller as a pf_video_filter return value.
+ * Provided for convenience.
+ */
+static inline picture_t *filter_NewPicture( filter_t *p_filter )
+{
+ picture_t *p_picture = p_filter->pf_vout_buffer_new( p_filter );
+ if( !p_picture )
+ msg_Warn( p_filter, "can't get output picture" );
+ return p_picture;
+}
+
+/**
+ * This function will release a picture create by filter_NewPicture.
+ * Provided for convenience.
+ */
+static inline void filter_DeletePicture( filter_t *p_filter, picture_t *p_picture )
+{
+ p_filter->pf_vout_buffer_del( p_filter, p_picture );
+}
+
+/**
+ * This function will return a new subpicture usable by p_filter as an output
+ * buffer. You have to release it using filter_DeleteSubpicture or by returning
+ * it to the caller as a pf_sub_filter return value.
+ * Provided for convenience.
+ */
+static inline subpicture_t *filter_NewSubpicture( filter_t *p_filter )
+{
+ subpicture_t *p_subpicture = p_filter->pf_sub_buffer_new( p_filter );
+ if( !p_subpicture )
+ msg_Warn( p_filter, "can't get output subpicture" );
+ return p_subpicture;
+}
+
+/**
+ * This function will release a subpicture create by filter_NewSubicture.
+ * Provided for convenience.
+ */
+static inline void filter_DeleteSubpicture( filter_t *p_filter, subpicture_t *p_subpicture )
+{
+ p_filter->pf_sub_buffer_del( p_filter, p_subpicture );
+}
+
+/**
+ * This function will return a new audio buffer usable by p_filter as an
+ * output buffer. You have to release it using block_Release or by returning
+ * it to the caller as a pf_audio_filter return value.
+ * Provided for convenience.
+ */
+static inline block_t *filter_NewAudioBuffer( filter_t *p_filter, int i_size )
+{
+ block_t *p_block = p_filter->pf_audio_buffer_new( p_filter, i_size );
+ if( !p_block )
+ msg_Warn( p_filter, "can't get output block" );
+ return p_block;
+}
+