source filter will simply want to re-output the same image multiple times
and reuse a buffer to do it, and the case where the source filter will
output multiple image by modifying a single buffer and outputting it multiple
times.
Commited in SoC by Bobby Bingham on 2007-08-18 02:21:01
Originally committed as revision 12103 to svn://svn.ffmpeg.org/ffmpeg/trunk
#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
+#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
} AVFilterPicRef;
/**