We cannot clip to INT_MAX because that value cannot be exactly
represented by a float value and ends up overflowing during conversion
anyway. We need to use a slightly smaller float value, which ends up
with slightly inaccurate results for samples which clip or nearly clip,
but it is close enough. Using doubles as intermediates in the conversion
would be more accurate, but it takes about twice as much time.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

This is more consistent with what the rest of Libav does.

This breaks API.

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

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

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

Signed-off-by: Justin Ruggles <justin.ruggles@gmail.com>

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

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

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

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

Double does not have enough precision to represent all int64 numbers
exactly.

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

Provides an option to disable mix level normalization
Signed-off-by: Diego Biurrun <diego@biurrun.de>

nasm prints a warning if the colon is missing.
Signed-off-by: Mans Rullgard <mans@mansr.com>

Adds some validation for changing parameters after setting the matrix and
fixes a bug in the conversion path setup.

Removes a false dependency on existing contents of the 2nd dst register,
giving better performance for OOE.

Adds optimized functions for mixing 3 through 8 input channels to 1 and 2
output channels in fltp or s16p format with flt coeffs.

Based partially on implementation by Michael Niedermayer <michaelni@gmx.at> in
libswresample in FFmpeg. See commits:
7f1ae79d
24ab1abf