Tested using this command:
/ffmpeg -pix_fmt yuv420p -s 1920*1080 -i ArashRawYuv420.yuv \
-vcodec rawvideo -s 1920*1080 -pix_fmt rgb24 -f null /dev/null

The fps increase from 389 to 640 on Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz
Signed-off-by: Ting Fu <ting.fu@intel.com>

The original inline assembly and nasm code have the same fps when called by command.
NASM code almost has no impact on the perfromance.
Signed-off-by: Ting Fu <ting.fu@intel.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Can be tested with:
$ ./configure --cc='cc -m32' --disable-optimizations --enable-pic

Also give consistent names to init functions.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This puts x86-specific things in the x86/ subdirectory where they
belong.
Signed-off-by: Mans Rullgard <mans@mansr.com>

Refactoring mmx2/mmxext YASM code with cpuflags will force renames.
So switching to a consistent naming scheme beforehand is sensible.
The name "mmxext" is more official and widespread and also the name
of the CPU flag, as reported e.g. by the Linux kernel.

The files do not contain only MMX code.

Fixes compilation for compilers that do not support gcc inline assembly.
Signed-off-by: Diego Biurrun <diego@biurrun.de>

This check is not correct, the code supports more yuv variants.
Fixes Ticket904
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Some MMX2 functions were being referenced without proper #ifdefs.

commit 5a5a0f16
Author: Diego Biurrun <diego@biurrun.de>
Date:   Fri May 27 19:46:39 2011 +0200

    swscale: Remove unused variables in x86 code.

    libswscale/x86/swscale_template.c:2072: warning: unused variable ‘canMMX2BeUsed’
    libswscale/x86/swscale_template.c:2145: warning: unused variable ‘canMMX2BeUsed’
    libswscale/x86/swscale_template.c:2209: warning: unused variable ‘chrVPixBuf’
    libswscale/x86/swscale_template.c:2237: warning: unused variable ‘chrVSrcPtr’

commit 389e2000
Author: Ronald S. Bultje <rsbultje@gmail.com>
Date:   Fri May 27 12:23:32 2011 -0400

    swscale: delay allocation of formatConvBuffer().

    That means it won't be allocated when not needed. Alongside
    this, it fixes valgrind/fate-detected memory leaks.

commit f327bfa6
Author: Ronald S. Bultje <rsbultje@gmail.com>
Date:   Fri May 27 11:36:43 2011 -0400

    swscale: fix build with --disable-swscale-alpha.

commit 9f5d4502
Author: Ronald S. Bultje <rsbultje@gmail.com>
Date:   Fri May 27 09:28:38 2011 -0400

    swscale: fix non-bitexact yuv2yuv[X2]() MMX/MMX2 functions.

Signed-off-by: Mans Rullgard <mans@mansr.com>

Originally committed as revision 31279 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale

We now have an LGPL replacement that is at least equally fast.

Originally committed as revision 31278 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale

It is now faster than the old gpl version on conroe.

Originally committed as revision 31181 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale

written by Kostya Shishkov

Originally committed as revision 31135 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale

swaps R and B inputs for the existing yuv420->bgr24 routine.

Originally committed as revision 30254 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale

- Place curly brackets in the same line as while/for/if/switch/else/do;
- Place curly brackets at column 0 in the next line starting a function.

Originally committed as revision 29523 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale

Patch by Peter Schlaile < peter at schlaile dot de >

Originally committed as revision 29515 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale

Originally committed as revision 29063 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale