lavfi: add avfilter_get_video_buffer_ref_from_frame to avcodec.h

Simplify passing AVFrame data to av_vsrc_buffer_add_video_buffer_ref().

doc/APIchanges

@@ -13,6 +13,9 @@ libavutil:   2011-04-18
 
 API changes, most recent first:
 
+2011-05-XX - XXXXXX - lavfi 2.6.0 - avcodec.h
+  Add avfilter_get_video_buffer_ref_from_frame() to libavfilter/avcodec.h.
+
 2011-05-18 - 64150ff - lavc 53.4.0 - AVCodecContext.request_sample_fmt
   Add request_sample_fmt field to AVCodecContext.
 

ffmpeg.c

@@ -1650,11 +1650,9 @@ static int output_packet(AVInputStream *ist, int ist_index,
                         picture.sample_aspect_ratio = ist->st->sample_aspect_ratio;
                     picture.pts = ist->pts;
 
-                    picref = avfilter_get_video_buffer_ref_from_arrays(
-                        picture.data, picture.linesize, AV_PERM_WRITE,
-                        picture.width, picture.height, picture.format);
-                    avfilter_copy_frame_props(picref, &picture);
-                    av_vsrc_buffer_add_video_buffer_ref2(ost->input_video_filter, picref, ""); //TODO user setable params
+                    picref =
+                        avfilter_get_video_buffer_ref_from_frame(&picture, AV_PERM_WRITE);
+                    av_vsrc_buffer_add_video_buffer_ref(ost->input_video_filter, picref, ""); //TODO user setable params
                     picref->buf->data[0] = NULL;
                     avfilter_unref_buffer(picref);
                 }

libavfilter/avcodec.c

@@ -40,3 +40,16 @@ void avfilter_copy_frame_props(AVFilterBufferRef *dst, const AVFrame *src)
         dst->video->pict_type           = src->pict_type;
     }
 }
+
+AVFilterBufferRef *avfilter_get_video_buffer_ref_from_frame(const AVFrame *frame,
+                                                            int perms)
+{
+    AVFilterBufferRef *picref =
+        avfilter_get_video_buffer_ref_from_arrays(frame->data, frame->linesize, perms,
+                                                  frame->width, frame->height,
+                                                  frame->format);
+    if (!picref)
+        return NULL;
+    avfilter_copy_frame_props(picref, frame);
+    return picref;
+}

libavfilter/avcodec.h

@@ -37,4 +37,12 @@
  */
 void avfilter_copy_frame_props(AVFilterBufferRef *dst, const AVFrame *src);
 
+/**
+ * Create and return a picref reference from the data and properties
+ * contained in frame.
+ *
+ * @param perms permissions to assign to the new buffer reference
+ */
+AVFilterBufferRef *avfilter_get_video_buffer_ref_from_frame(const AVFrame *frame, int perms);
+
 #endif /* AVFILTER_AVCODEC_H */

libavfilter/avfilter.h

@@ -26,7 +26,7 @@
 #include "libavutil/samplefmt.h"
 
 #define LIBAVFILTER_VERSION_MAJOR  2
-#define LIBAVFILTER_VERSION_MINOR  5
+#define LIBAVFILTER_VERSION_MINOR  6
 #define LIBAVFILTER_VERSION_MICRO  0
 
 #define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \