On Wednesday 20 August 2008 12:23:39 Hannu Savolainen wrote: > > I took a quick look at pulseaudio (module-oss.c). There are few obvious > errors: > > - If the trigger() function gets called with quick==true then it will > fail for sure. It will not start recording.
A modified pulseaudio still fails. Attached is a more complete strace output
(earlier I didn't have strace follow forks). The 29395 file is where it tries
to play.
> - Calling SNDCTL_DSP_HALT in the place it's called now is an error. It
> will prevent SNDCTL_DSP_SETTRIGGER from working even when quick==false.
This isn't compiled by default on Linux, since its <soundcard.h> doesn't have
HALT.
> - The call to SNDCTL_DSP_POST is bogus. It may or may not cause troubles.
> - Below that the "/* Some crappy drivers do not start... */ is wrong.
> Instead of calling read() it should do SNDCTL_DSP_SETTRIGGER(0) and
> SNDCTL_DSP_SETTRIGGER(PCM_ENABLE_INPUT). This should be done even when
> quick==true.
That's the non-mmap path which currently works.
Yours,
Yair K.
strace.tar.gz
Description: application/tgz
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