[Bug 10910] winealsa and PulseAudio

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=10910


Raymond <superquad.vortex2 at gmail.com> changed:

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                 CC|                            |superquad.vortex2 at gmail.com




--- Comment #45 from Raymond <superquad.vortex2 at gmail.com>  2010-04-08 22:03:54 ---
(In reply to comment #38)
> The PA have to know what exactly is the problem and Maarten isn't sure where it
> is lying..

Refer to the post by the author of winepulse 

http://old.nabble.com/Wine-PulseAudio-Driver-tt19701227.html#a19778396

>> My problem is that WaveIn  / WaveOut devices are supposed to be able to
support multiple streams if the hardware allows it, however it is
impossible to support this currently as all MDRV_Message gives us is the
device id the message is for (the only arguments to a WODM_PAUSE is the
device id for instance.) This makes multiple streams impossible and
therefor waveout drivers only support one stream per device. wineesd.drv
gets around this by staticly making 10 waveout and 10 wavein devices,
all effectively the same. 

The current problem of winealsa.drv is not support multiple streams ( minimum
16 voices for dsound ) , this is also true for the current implementation of
winepulse.drv too since pulseaudio only support per application volume control
but those dsound program need 16 voices


the best performance path should be wine implement 16 dsound voices for those
hardware mixing sound card with per voice volume controls ( the full hardware
acclearation mean the hardware can perform pitching for the doppler effect and
use DSP to provide hardware attenuation/gain the digital audio signal for the
left/right channel (panning) 

most of the so called hardware mixing sound cards support hardware wavetable
synth since they all support at least 16 midi voices

any path involve software mixing cannot be regarded as the optimal path

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