Originally committed as revision 23904 to svn://svn.ffmpeg.org/ffmpeg/trunk

and leave av_sha1_* functions for compatibility until next major bump.

Originally committed as revision 19394 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 19385 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

Originally committed as revision 11838 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 10765 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 9444 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 9344 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 8351 to svn://svn.ffmpeg.org/ffmpeg/trunk