Originally committed as revision 25996 to svn://svn.ffmpeg.org/ffmpeg/trunk

per-channel exponent strategy decision.  This will also make it easier to
plug-in other exponent strategy algorithms.

Originally committed as revision 25995 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25994 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25993 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25992 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25991 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25990 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25989 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25988 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25987 to svn://svn.ffmpeg.org/ffmpeg/trunk

This reduces the amount of memcpy() by using pointers to overlap samples for
successive blocks rather than copying.

Originally committed as revision 25986 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25985 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25984 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25983 to svn://svn.ffmpeg.org/ffmpeg/trunk

Return AVERROR(EINVAL) instead of -1. Propogate errors from called functions.
Add some error log printouts.

Originally committed as revision 25982 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25981 to svn://svn.ffmpeg.org/ffmpeg/trunk

Eliminates a goto and mirrors the bitrate validation.

Originally committed as revision 25980 to svn://svn.ffmpeg.org/ffmpeg/trunk

This is an av_cold function, and we don't need to duplicate variables just to
save a few characters.

Originally committed as revision 25979 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25978 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25977 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25976 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25975 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25974 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25973 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25972 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25971 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25970 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25969 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25968 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25967 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25966 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25965 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25964 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25963 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25962 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25961 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25960 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25959 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25958 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25957 to svn://svn.ffmpeg.org/ffmpeg/trunk