Otherwise doxygen complains about ambiguous filenames when files exist under the same name in different subdirectories. Originally committed as revision 16912 to svn://svn.ffmpeg.org/ffmpeg/trunk
applying two separate filtering passes, so implement them explicitly. Originally committed as revision 16190 to svn://svn.ffmpeg.org/ffmpeg/trunk
Originally committed as revision 11398 to svn://svn.ffmpeg.org/ffmpeg/trunk