Adds a wrapper function for downmixing which detects channel count changes
and updates the selected downmix function accordingly.

Simplification and porting to current x86inc infrastructure by Diego Biurrun.

Signed-off-by: Diego Biurrun <diego@biurrun.de>

Also use (float **) instead of (float (*)[2]). This matches the matrix
layout in libavresample so we can reuse assembly code between the two.

Signed-off-by: Diego Biurrun <diego@biurrun.de>

This fixes decoding corruption on 64 bit windows.

Signed-off-by: Martin Storsjö <martin@martin.st>

This avoids SIMD-optimized functions having to sign-extend their
stride argument manually to be able to do pointer arithmetic.

This avoids SIMD-optimized functions having to sign-extend their
stride argument manually to be able to do pointer arithmetic.

ptrdiff_t is the correct type for array strides and similar.

This will make the x86 asm simpler.

ARM conversion by Martin Storsjö <martin@martin.st> and Janne Grunau
<janne-libav@jannau.net>

It has no effect, since the code is supposed to operate the same way for
any bit depth.

Also change shl to add, since it can be faster on some CPUs.

CC: libav-stable@libav.org

This version, which is the only one doing two processing cycles per loop
iteration, computes the load/store indices incorrectly for the second
cycle.

CC: libav-stable@libav.org

This avoids SIMD-optimized functions having to sign-extend their
line size argument manually to be able to do pointer arithmetic.

Also adjust parameter names to be "stride" everywhere.

VP5 has no arch-specific optimizations (nor will it get some in the
future), so it makes no sense to try to share dsp init code with VP6.

This avoids SIMD-optimized functions having to sign-extend their
line size argument manually to be able to do pointer arithmetic.

Also adjust parameter names to be "linesize" everywhere.

ptrdiff_t is the correct type for array strides and similar.

This avoids SIMD-optimized functions having to sign-extend their
line size argument manually to be able to do pointer arithmetic.

This avoids SIMD-optimized functions having to sign-extend their
stride argument manually to be able to do pointer arithmetic.

Also adjust parameter names to be "stride" everywhere.

This gem has been disabled since 2001.

Also a slight change to the ssse3 code, which prevents a theoretical
overflow in the sharp filter.

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Roughly 25% faster MC than ssse3 for blocksizes 32 and 64.

Reviewed-by: Ronald S. Bultje <rsbultje@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Signed-off-by: Anton Khirnov <anton@khirnov.net>

pavgb is an sse integer instruction, so the mmxext flag is enough

Signed-off-by: James Almer <jamrial@gmail.com>
Reviewed-by: "Ronald S. Bultje" <rsbultje@gmail.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Signed-off-by: Anton Khirnov <anton@khirnov.net>

It only contains the MC SIMD, other SIMD will go into different files.

Signed-off-by: Anton Khirnov <anton@khirnov.net>

That code is only ever initialized with that flag set.

Originally written by Pierre Edouard Lepere <pierre-edouard.lepere@insa-rennes.fr>.
Integrated to Libav by Josh de Kock <josh@itanimul.li>.

Signed-off-by: Alexandra Hájková <alexandra@khirnov.net>

Signed-off-by: Martin Storsjö <martin@martin.st>

This is more consistent with the naming of other decoders.

Signed-off-by: Martin Storsjö <martin@martin.st>

These warnings conflict with system macros on Solaris, producing
truckloads of warnings about macro redefinition.

Signed-off-by: Diego Biurrun <diego@biurrun.de>

Restore alphabetical order in lists, break overly long lines, do some
prettyprinting, add some explanatory section comments, group parts
together that belong together logically.

Some optimized functions reference optimized symbols, so the functions
must be explicitly disabled when those symbols are unavailable.

The 10bit and the 8bit functions can now be implemented to process
a different amount of samples.

And while at it simplify a little the code.

Around 25% faster than the ssse3 version.

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>