Patch by Rafaël Carré, rafael d carre a gmail

Originally committed as revision 24499 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 24498 to svn://svn.ffmpeg.org/ffmpeg/trunk

av_ is a prefix reserved for av* libraries functions, using that for an
application function is confusing.

Originally committed as revision 24497 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 24496 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 24495 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 24494 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 24493 to svn://svn.ffmpeg.org/ffmpeg/trunk

The variable refer to a *decoder* context, the old name was
misleading.

Originally committed as revision 24492 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 24491 to svn://svn.ffmpeg.org/ffmpeg/trunk

handled by upper layers.
Fixes double-frees (issue 2003).
Instead call ffm_close to ensure rc_eqs are freed also in the error case.

Originally committed as revision 24490 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 24489 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 24488 to svn://svn.ffmpeg.org/ffmpeg/trunk

splits it into small optimization-specific macros which are selected for each
DSP function. The advantage of this approach is that the sse4 functions now
use the ssse3 codepath also without needing an explicit sse4 codepath.

Originally committed as revision 24487 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 24486 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 24485 to svn://svn.ffmpeg.org/ffmpeg/trunk

This gives an almost 20% speedup.

Originally committed as revision 24484 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 24483 to svn://svn.ffmpeg.org/ffmpeg/trunk

Reduce scalefactors in non-zero bands that underflow by twice as much as those
in bands that just fail to hit psy targets.

Originally committed as revision 24482 to svn://svn.ffmpeg.org/ffmpeg/trunk

definition of ff_yuv2packedX_altivec

Originally committed as revision 31782 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale

audio encoders.
This is purely for clarity/documentation purposes.

Originally committed as revision 24481 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 24480 to svn://svn.ffmpeg.org/ffmpeg/trunk

used to initialized another array element of the same array.

Originally committed as revision 24479 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 31781 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale

Originally committed as revision 31780 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale

Originally committed as revision 31779 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale

are defined.

Originally committed as revision 31778 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale

If there is little unread data in the ByteIOContext buffer, this may lead
to reducing the size of the ByteIOContext buffer to little more the probe
data size. This can lead to suboptimal aviobuf behaviour, e.g. making some
demuxers fail to do short seeks backwards (if the input isn't seekable).

Originally committed as revision 24478 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 24477 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 24476 to svn://svn.ffmpeg.org/ffmpeg/trunk

This is slightly faster and opens the door for further optimization.

Originally committed as revision 24475 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 24474 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 24473 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 24472 to svn://svn.ffmpeg.org/ffmpeg/trunk

This is a lot more reliable to get cmov rather than trying to trick gcc into
generating it, useful since it's 2% faster overall.

Patch by Eli Friedman <eli.friedman at gmail>

Originally committed as revision 24471 to svn://svn.ffmpeg.org/ffmpeg/trunk

Much faster read_mv_component, slightly faster overall

Originally committed as revision 24470 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 24469 to svn://svn.ffmpeg.org/ffmpeg/trunk

on the huffman tree, instead of traversing the tree in a while loop.

Based on the similar optimization in libvpx's detokenize.c

10% faster at normal bitrates, and 30% faster for high-bitrate intra-only

Originally committed as revision 24468 to svn://svn.ffmpeg.org/ffmpeg/trunk

No difference at the moment, but allows a future branchy variant
of vp56_rac_get_prob to be significantly faster

Originally committed as revision 24467 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 24466 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 24465 to svn://svn.ffmpeg.org/ffmpeg/trunk