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PPC: Altivec split-radix FFT
1.8x faster than altivec radix-2 on a G48% faster vorbis decoding
Patch (mostly) by Loren Merritt
Originally committed as revision 23956 to svn://svn.ffmpeg.org/ffmpeg/trunk
Cleanup _t types in libavcodec/ppc
Originally committed as revision 16357 to svn://svn.ffmpeg.org/ffmpeg/trunk
Globally rename the header inclusion guard names.
Consistently apply this rule: the guard name is obtained from thefilename by stripping the leading "lib", converting '/' and '.' to'_' and uppercasing the resulting name. Guard names in the rootdirectory have to be prefixed by "FFMPEG_"....
Add FFMPEG_ prefix to all multiple inclusion guards.
Originally committed as revision 10765 to svn://svn.ffmpeg.org/ffmpeg/trunk
add a comment to indicate which #endif belong to which #define
Originally committed as revision 9356 to svn://svn.ffmpeg.org/ffmpeg/trunk
add multiple inclusion guards to headers
Originally committed as revision 9345 to svn://svn.ffmpeg.org/ffmpeg/trunk
Add useful Altivec types, taken from with permission from x264 authors
Originally committed as revision 7125 to svn://svn.ffmpeg.org/ffmpeg/trunk