Also give consistent names to init functions.

This simplifies the code and improves quality at the expense of a slight
slowdown of a rarely used function (no fate test uses it).

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

This tries to compensate for the errors introduced by
the rounding of pmulhw

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

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

This fix a bunch of "assignment from incompatible pointer type" warnings
with GCC.

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

This separates code relying on inline from that relying on external
assembly and fixes instances where the coalesced check was incorrect.

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
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>

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

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

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

Fixes overflows for large image sizes.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org

Fixes crashes for extremely large resizes (several 100-fold).

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org

Revert "swscale: update context offsets after removal of AlpMmxFilter."
(commit a95e3fa90b)
and
Revert "swscale: Remove some write-only variables related to alpha handling."
(commit 9d03cb9fc5).

They broke alpha handling - it's the evil inline asm that still uses that
variable, so it's not truely write-only.

They no longer just segfault.

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

This was accidently disabled.

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

Also implement sse2/ssse3/avx versions.

Also implement SSE2/AVX variants.

These semicolons cause invalid empty top-level declarations.

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

libswscale/x86/swscale_mmx.c:131:36: warning: to be safe all intermediate pointers in cast from ‘int16_t **’ to ‘const int16_t **’ must be ‘const’ qualified [-Wcast-qual]
libswscale/x86/swscale_mmx.c:132:37: warning: to be safe all intermediate pointers in cast from ‘int16_t **’ to ‘const int16_t **’ must be ‘const’ qualified [-Wcast-qual]
libswscale/x86/swscale_mmx.c:133:74: warning: to be safe all intermediate pointers in cast from ‘int16_t **’ to ‘const int16_t **’ must be ‘const’ qualified [-Wcast-qual]

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

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

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

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

Code is about 2x as fast as previous

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

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

Also implement MMX/MMX2 versions and SSE4 versions.

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

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

Speed: from 3.9x to 9.6x speed improvement over C, and some small
(up to 15%) speed improvements over existing MMX code (particularly
for bigger filters).

Some MMX2 functions were being referenced without proper #ifdefs.