Bug#419890: include aoTuV patch

[Fabio]

Package: libvorbis
Severity: wishlist
Version: 1.1.2.dfsg-1.2
Tags: patch

Would be nice to include aoTuV [1] patch to libvorbis. aoTuV is an
improved libvorbis encoder, that, while keeping ABI compatibility,
gives many improvement:

* better quality at all bitrates versus libvorbis-1.1.2 [2], giving
aoTuV better quality than other codecs (AAC, MP3, MPC, WMA, ...) [3];
* support of quality down to -2 (32kb/s at 44kHz stereo), versus -1
(45kb/s at 44kHz stereo) of libvorbis-1.1.x;
* encoding speed 10% better thanks to the included Vorbis-OptSort [4]
patch (improve ordering loop).

aoTuV Release 1 is the 'stable' release, while aoTuV beta 5 is the
latest 'beta' release. aoTuV versions have been tested and found to
have a better quality by the audio community (especially on
hydrogenaudio forum [5]) and this is the reccomended vorbis encoder [6].

Note that, e.g., ffmpeg2theora binaries [7] already includes aoTuV
beta 5 patch.

[1] aoTuV site: www.geocities.jp/aoyoume/aotuv/
[2] comparison of aoTuV beta 4 vs libvorbis-1.1.x:
http://wiki.xiph.org/index.php/VorbisEncoders
[3] Wikipedia test of vorbis vs other codecs:
http://en.wikipedia.org/wiki/Vorbis#Codec_comparisons
[4] http://www.cug.net/~manuke/vorbis-optsort-en.html
[5] hydrogenaudio forum: http://www.hydrogenaudio.org
[6] Recommended Ogg Vorbis:
http://wiki.hydrogenaudio.org/index.php?title=Recommended_Ogg_Vorbis
[7] http://www.v2v.cc/~j/ffmpeg2theora/