msacm: pcm compatibility patch

[Eric Pouech]

Christian Costa a écrit :
> Hi Robert,
> 
> Robert Reif wrote:
> 
>> Makes the PCM conversion routines of msacm produce identical results 
>> to the native dll.
>> Allow any PCM to PCM conversion, not just advertised ones.
>>
>> The algorithms used by Microsoft in this dll are very crude and
>> produce an output of much poorer quality than what is currently
>> in wine.  This is unfortunate but unavoidable if we are to be compatible.
> 
> 
> I don't see how improving the quality of the conversion could cause 
> problems.
> Is there an app out there that refuses to run or crashes because of that?
> The algorithms may have slightly changed across all versions of this dll.
> And if we can do better job than Microsoft, I think we should do it.


I'd agree that what we don't need byte compatibility for the audio conversions. 
We should be compatible OTOH on the size of the buffers sent out (not sure it's 
always the case), which may cause some problems in some cases.
A+