not needed for spectral extension or enhanced coupling since it is
redundant information, so I am removing it from decode_band_structure()
as well.

Originally committed as revision 18751 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 18622 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 18494 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 17398 to svn://svn.ffmpeg.org/ffmpeg/trunk

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 15818 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 15812 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 15011 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 14991 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 14990 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 14953 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 14952 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 14819 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 14815 to svn://svn.ffmpeg.org/ffmpeg/trunk

20% faster ac3 if downmixing, 15% if not

Originally committed as revision 14743 to svn://svn.ffmpeg.org/ffmpeg/trunk

1.3x faster 5.1->stereo, 1.9x faster 5.1->mono.

Originally committed as revision 14719 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 14706 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 14705 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 14702 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 14523 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 14516 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 14515 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 14514 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 13714 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 13704 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 13703 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 13702 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 13701 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 13700 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 13699 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 13698 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 13697 to svn://svn.ffmpeg.org/ffmpeg/trunk