[openal] [WIP] AL_EXT_MSADPCM in OpenAL Soft

[Ethan Lee]

Excellent! You'll be delighted to know that this not only works now, but 
is actually twice as fast as our crazy way of doing it.

Thanks so much for looking at this! If you need anything else from me to 
get this ready for the next AL Soft release, let me know.

-Ethan

On 03/05/2014 09:23 AM, Chris Robinson wrote:
> On 03/05/2014 05:57 AM, Ethan Lee wrote:
>> Looks great to me! It certainly looks a lot nicer than my solution...
>>
>> But, currently getting an odd segfault in Convert_ALshort_ALmsadpcm,
>> seems to happen at the Conv_ALshort_ALshort line. Couldn't figure it
>> out, so I've got a test case over here if anyone wants to look at it:
>>
>> http://www.flibitijibibo.com/testCaseMSADPCM.tar.bz2
>
> Oops, I wasn't allocating enough temp space in the decoder and encoder 
> functions, causing it to overrun the buffer. Fixed now. I also 
> implemented optimized methods for ALshort<->ADPCM conversions to avoid 
> the temp buffer.