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
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
sequential geometries instead of running all algorithms sequentially for each
geometry.
Originally committed as revision 31775 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale
Apparently the official conformance test vectors don't test this feature,
even though libvpx uses it.
Originally committed as revision 24456 to svn://svn.ffmpeg.org/ffmpeg/trunk
Take shortcuts based on statistically common situations.
Add 4-at-a-time idct_dc function (mmx and sse2) since rows of 4 DC-only DCT
blocks are common.
TODO: tie this more directly into the MB mode, since the DC-level transform is
only used for non-splitmv blocks?
Originally committed as revision 24452 to svn://svn.ffmpeg.org/ffmpeg/trunk
Don't prefetch reference frames that were used less than 1/32th of the time so
far in the frame.
This helps speed up to ~2% on videos that, in many frames, make near-zero
(but not entirely zero) use of golden and/or alt-refs.
This is a very common property of videos encoded by libvpx.
Originally committed as revision 24451 to svn://svn.ffmpeg.org/ffmpeg/trunk
Prefetch all refs (including altref), but only if they've been used so far this
frame.
~2.5% faster overall.
TODO: Do something even smarter, like using how often each ref has been used
so far, so that a couple blocks of a rarely-used ref don't force us to prefetch
it.
Originally committed as revision 24444 to svn://svn.ffmpeg.org/ffmpeg/trunk
Making automatic reconfigure work properly in all cases proved more
difficult than it seemed, and people complained about it. Instead,
print a warning when the configuration appears to be out of date.
Originally committed as revision 24436 to svn://svn.ffmpeg.org/ffmpeg/trunk
Some converters (ie. unscaled rgb24 -> argb) may write some bytes out of
bounds. Ideally the converters should be fixed, but in the meantime we allocate
more memory to prevent heap corruption.
Originally committed as revision 31768 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale
PRINT_LIB_VERSION() -> PRINT_LIB_INFO()
print_all_lib_versions() -> print_all_libs_info()
Originally committed as revision 24433 to svn://svn.ffmpeg.org/ffmpeg/trunk
Alex Converse
Eli Friedman
David Conrad
Jason Garrett-Glaser
Ramiro Polla
Vitor Sessak
Baptiste Coudurier
Stefano Sabatini
Ronald S. Bultje
Måns Rullgård
James Zern