Signed-off-by: Mans Rullgard <mans@mansr.com>

Originally committed as revision 18494 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

patch by Zdenek Kabelac, zdenek d kabelac a gmail d com

Originally committed as revision 11608 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 11087 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 10986 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 10975 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 10971 to svn://svn.ffmpeg.org/ffmpeg/trunk