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

Originally committed as revision 16840 to svn://svn.ffmpeg.org/ffmpeg/trunk

Consistently apply this rule: the guard name is obtained from the
filename by stripping the leading "lib", converting '/' and '.'  to
'_' and uppercasing the resulting name. Guard names in the root
directory have to be prefixed by "FFMPEG_".

Originally committed as revision 15120 to svn://svn.ffmpeg.org/ffmpeg/trunk

version.

Originally committed as revision 14818 to svn://svn.ffmpeg.org/ffmpeg/trunk

forgotten in case they ever become neccessary.

Originally committed as revision 14810 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 14809 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 14808 to svn://svn.ffmpeg.org/ffmpeg/trunk

(will be cleaned up in next commits)

Originally committed as revision 14802 to svn://svn.ffmpeg.org/ffmpeg/trunk