OSS favored over ALSA in PortAudioSharp.Audio about portaudiosharp

[GoogleCodeExporter]

I found the bug and I have patched the Audio class to prefer ALSA over OSS and 
made
ALSA work...

Apart from the change I've suggested above, it was necessary to change
suggestedLatency to make ALSA work properly. E.g. line 139:
inputParams.suggestedLatency = this.inputDeviceInfo.defaultLowInputLatency;
and Line 143:
outputParams.suggestedLatency = this.outputDeviceInfo.defaultLowOutputLatency;

I admit I don't know why this is necessary, I hardly know what latency means :)
But according to PortAudio documentation:
http://www.portaudio.com/docs/v19-doxydocs/structPaStreamParameters.html#a1e80ac
0551162fd091db8936ccbe9a0

Implementations (Audio drivers I assume) should, if suggested latency is not
possible, choose the closes possible latency... So maybe this a bug specific to 
my
version of PortAudio which is 19+svn20071207-0ubuntu3.
Somebody else should probably try to confirm otherwise...

Anyway, with the patch both ALSA and OSS works just fine...

Original comment by [email protected] on 20 Jan 2009 at 3:50

Attachments:

• Audio.patch

[GoogleCodeExporter]

I'm sorry I didn't notice this case before.
I tought that I would have received a notification email from Google Code when 
a new
case is opened but for some reason I didn't received it.
Thank you for the patch! I'm going to rewiew it as soon as i have some spare 
time.

Original comment by [email protected] on 1 Apr 2009 at 2:28

• Added labels: OpSys-Linux

[GoogleCodeExporter]

I had chosen OSS over ALSA because that was the only apiHost that worked in my 
Linux
install, this was probably due to the incorrect latency setting.

I've just submitted your patch,
thank you very much for your help :)

Original comment by [email protected] on 2 Apr 2009 at 6:48

• Changed state: Fixed

[GoogleCodeExporter]

As far as remember I never really got ALSA to work either... It worked when 
nothing
else was playing, but if Amarok was running in the background it wouldn't 
play...

But suspect that it might have something todo with Ubuntu PulseAudio 
implementation,
not sure... I gave up, and will try to do mp3 playback with C# again sometime 
in the
future...

Original comment by [email protected] on 2 Apr 2009 at 7:17