Add w,h,format back into AVFilterBuffer, these are required for direct rendering.

These fields are needed to be able to know which area of memory is allocated and
which is off limits.
This reverts 24291 and parts of r24424.

Originally committed as revision 26314 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavfilter/avfilter.c

@@ -283,15 +283,15 @@ avfilter_get_video_buffer_ref_from_arrays(uint8_t *data[4], int linesize[4], int
     if (!(picref->video = av_mallocz(sizeof(AVFilterBufferRefVideoProps))))
         goto fail;
 
-    picref->video->w = w;
-    picref->video->h = h;
+    pic->w = picref->video->w = w;
+    pic->h = picref->video->h = h;
 
     /* make sure the buffer gets read permission or it's useless for output */
     picref->perms = perms | AV_PERM_READ;
 
     pic->refcount = 1;
     picref->type = AVMEDIA_TYPE_VIDEO;
-    picref->format = format;
+    pic->format = picref->format = format;
 
     memcpy(pic->data,        data,          sizeof(pic->data));
     memcpy(pic->linesize,    linesize,      sizeof(pic->linesize));

libavfilter/avfilter.h

@@ -27,7 +27,7 @@
 #include "libavcore/samplefmt.h"
 
 #define LIBAVFILTER_VERSION_MAJOR  1
-#define LIBAVFILTER_VERSION_MINOR 72
+#define LIBAVFILTER_VERSION_MINOR 73
 #define LIBAVFILTER_VERSION_MICRO  0
 
 #define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
@@ -80,6 +80,9 @@ typedef struct AVFilterBuffer {
      * reallocating it from scratch.
      */
     void (*free)(struct AVFilterBuffer *buf);
+
+    int format;                 ///< media format
+    int w, h;                   ///< width and height of the allocated buffer
 } AVFilterBuffer;
 
 #define AV_PERM_READ     0x01   ///< can read from the buffer