libavcodec to libavcore. Remove another compile-time dependancy of libavfilter on libavcodec. Originally committed as revision 25923 to svn://svn.ffmpeg.org/ffmpeg/trunk
Originally committed as revision 23637 to svn://svn.ffmpeg.org/ffmpeg/trunk
This is needed by the current SOC-ffmpeg.c code. Originally committed as revision 23039 to svn://svn.ffmpeg.org/ffmpeg/trunk