Add another "reuse" permission, to distinguish between the case where a

Add another "reuse" permission, to distinguish between the case where a
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