[Bug 28622] alsa under pulseaudio no longer produce sound.

wine-bugs at winehq.org wine-bugs at winehq.org
Thu Oct 13 21:04:22 CDT 2011


http://bugs.winehq.org/show_bug.cgi?id=28622

--- Comment #4 from Raymond <superquad.vortex2 at gmail.com> 2011-10-13 21:04:22 CDT ---
(In reply to comment #3)
> Created attachment 36857 [details]
> dsound: Request a more exact buffer size from MMDevAPI
> 
> (In reply to comment #2)
> > reduce the period time from 200 *10000 to 2321930 (23.2ms) in
> > dlls/dsound/primary.c seem fix the choppy sound 
> > 
> > 200ms @44100Hz is too large (> half buffer size when your sound card only have
> > 64K Bytes buffer 371ms)
> > 
> > 
> >     /* buffer size = 200 * 100000 (100 ns) = 2.0 secods */
> >     hres = IAudioClient_Initialize(device->client,
> >             AUDCLNT_SHAREMODE_SHARED, AUDCLNT_STREAMFLAGS_NOPERSIST,
> > -            200 * 100000, 50000, device->pwfx, NULL);
> > +            2321930, 50000, device->pwfx, NULL);
> 
> That's the buffer size, not the period size. In any case, I have this patch in
> my queue which does the same thing a little more intelligently. It requests the
> buffer size to be exactly as large as the maximum data that dsound will send to
> mmdevapi. I've attached it here, and it fixes VLC for me as well.

it is period time in alsa driver , choppy sound because wine is using 1 period
per buffer on SB Live! Platinum (8820 frames 0.2 second period time)

The other point is you have removed the difference between primary/secondary
buffer , vlc is trying to change the primary buffer format

trace:dsound:DirectSoundDevice_SetCooperativeLevel
(0x182f190,0x10040,DSSCL_EXCLUSIVE)
warn:dsound:DirectSoundDevice_SetCooperativeLevel level=DSSCL_EXCLUSIVE not
fully supported


Since vlc support both winmm and dsound output module , playing a 22050Hz wav
with SB Live! Platinum

winealsa(winmm) use 22050Hz (221 frames 10.022ms)

winealsa(dsound) resample to 44100Hz (ds_default_sample_Rate) (512 frames
11.609ms)

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