[SDL] [PATCH] Use SDL_Swap* function in SDL_mixer.c

[Stephane Marchesin]

Patrice Mandin wrote:

>Hello,
>
>Here is a patch to use SDL endianness function to read/write 16 bits
>samples when mixing the buffers. It should be faster when
>SDL_Swap?E16() functions are assembly optimized in SDL_endian.h
>
Did you check that it was actually faster ? As I said previously, 
SDL_Swap*16 on x86 results in a locking instruction which might execute 
a lot slower on smp systems.

Stephane