DirectSound and i810 soundcards

[Eric Pouech]

> Another thing i 
> wonder about is whether Windows lets you play 11kHz sounds with 
> WAVE_FORMAT_DIRECT using winmm and an i810 soundcard. If not then my 
> winmm test is incorrect, and if yes then I have to wonder what 
> WAVE_FORMAT_DIRECT really means. So if someone can send me these results...
well, it may also depends on who is in charge to "understand" the 
WAVE_FORMAT_DIRECT:
- from what I understand from the doc (I didn't actually tested under 
windows), WAVE_FORMAT_DIRECT tells winmm not to perform frequency 
modification if the driver doesn't support the requested format
- it doesn't state that the driver shouldn't do any transformation by itself

A+

> I don't know why the mmap fails. I would tend to think this is a 
> limitation or bug of the Alsa driver since it works with the OSS driver. 
do you mean
- wine OSS driver on a Linux OSS emulation on ALSA driver
- or wine ALSA driver on a Linux ALSA driver
the later could have still quite a few issues

anyway, there are also a couple of issues we may have to look after:
- the driver interface used always comes from a single audio driver 
(even if multiple audio drivers are installed in wine)
- trying to get rid of wine's DRV_QUERYDSOUNDIFACE... a bit more 
hacky... one solution would be (as MS does) to install in the registry 
all the required settings for our sound drivers (including a guid for 
each wave out, wave in... so that we could bind dsound to each of those 
drivers)
- getting rid of WAVE_DIRECTSOUND... I didn't look at all the details... 
but, wouldn't the semantics of open&setformat methods of the IDsDriver 
be enough for that

A+
-- 
Eric Pouech