Move the AV_PERM_* flags definition outside the AVFilterPicRef

definition.

This way it is easier to reference them in other structures, for
example in the pending AVFilterSamplesRef struct.

Patch by S.N. Hemanth Meenakshisundaram smeenaks AT ucsd DOT edu.

Originally committed as revision 24294 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavfilter/avfilter.h

@@ -83,6 +83,12 @@ typedef struct AVFilterBuffer
     void (*free)(struct AVFilterBuffer *buf);
 } AVFilterBuffer;
 
+#define AV_PERM_READ     0x01   ///< can read from the buffer
+#define AV_PERM_WRITE    0x02   ///< can write to the buffer
+#define AV_PERM_PRESERVE 0x04   ///< nobody else can overwrite the buffer
+#define AV_PERM_REUSE    0x08   ///< can output the buffer multiple times, with the same contents each time
+#define AV_PERM_REUSE2   0x10   ///< can output the buffer multiple times, modified each time
+
 /**
  * A reference to an AVFilterBuffer. Since filters can manipulate the origin of
  * a picture to, for example, crop image without any memcpy, the picture origin
@@ -104,12 +110,7 @@ typedef struct AVFilterPicRef
 
     AVRational pixel_aspect;    ///< pixel aspect ratio
 
-    int perms;                  ///< permissions
-#define AV_PERM_READ     0x01   ///< can read from the buffer
-#define AV_PERM_WRITE    0x02   ///< can write to the buffer
-#define AV_PERM_PRESERVE 0x04   ///< nobody else can overwrite the buffer
-#define AV_PERM_REUSE    0x08   ///< can output the buffer multiple times, with the same contents each time
-#define AV_PERM_REUSE2   0x10   ///< can output the buffer multiple times, modified each time
+    int perms;                  ///< permissions, see the AV_PERM_* flags
 
     int interlaced;             ///< is frame interlaced
     int top_field_first;