[Portaudio] Windows Direct Sound broken in dev after rev. 1515
ralph.irving at gmail.com
Fri Jul 9 14:14:58 EDT 2010
framesPerBuffer = 0
sample rate = 44100.0
frame rate = paInt16
suggestedLatency = defaultHighOutputLatency
channelCount = 2
On Fri, 9 Jul 2010, Dmitry Kostjuchenko wrote:
> Hi Ralph,
> The bug appreared due to optimization work done on PA processor. Optimization
> results in direct host buffer pointers passing to a user space. This results
> in no copying and thus unloads CPU. According Ross request I reverted
> pa_process.c/.h which modified in 1516-1517 revisions back to their initial
> state. I am working closely with Ross to provide more stable and correct
> implementation of this optimisation idea and it will be re-commited back when
> So far you can update SVN trunk and recompile to have previous behavior. Ross
> suspects that Alberto's problem roots are the same, e.g. related to my
> modification to pa_process.c/.h.
> I have a question for you to help us in this work: could you please describe
> parameters which are passed to Pa_OpenStream, e.g.:
> - framesPerBuffer
> - sample type
> - frame rate
> - suggestedLatency
> I will then use them in debugging of our mutual re-implementation.
> ----- Original Message ----- From: "Ralph Irving" <ralph.irving at gmail.com>
> To: <portaudio at music.columbia.edu>
> Sent: Friday, July 09, 2010 8:40 PM
> Subject: [Portaudio] Windows Direct Sound broken in dev after rev. 1515
>> I updated portaudio in my project to r1519 from r1508 and the audio is now
>> distorted and muffled.
>> I had to role back to r1515 to get things sounding correct again.
>> Has anyone else noticed this?
>> Portaudio mailing list
>> Portaudio at music.columbia.edu
> Portaudio mailing list
> Portaudio at music.columbia.edu
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