At Fri, 5 Sep 2008 08:42:08 +1000, Kevin Gilbert wrote: > > Hi, > > I'm trying to get an jukebox application going on a Sony PlayStation3 using > Qt-Embedded, Phonon and PulseAudio. The application is working well on my KDE- > based laptop where it appears that the application is using Phonon -> ALSA -> > PulseAudio. But there is no sound from the application when run on the PS3. > > I initially reported this problem to the PulseAudio mailing list. The first > post on this topic is at https://tango.0pointer.de/pipermail/pulseaudio- > discuss/2008-August/002249.html . In pacticular, see these posts: > > 1) https://tango.0pointer.de/pipermail/pulseaudio-discuss/2008- > September/002346.html where I detail the results of a final test using the > latest development version of PulseAudio; and > > 2) https://tango.0pointer.de/pipermail/pulseaudio-discuss/2008- > September/002347.html where a PulseAudio developer diagnoses the problem as > being within ALSA. > > For convenience, the following is from the latter post: > > "So, what happens here is this: your device can only do non-interleaved audio > and is hence configured for it (as we can see from that "slave setup" listing > above). Because your hardware lacks a hardware volume control ALSA puts > "softvol" on top of the hw device: the "Soft Volume PCM" you can see in the > first part. That device is initialized for interleaved audio as you can see. > Which is what PA supports and PA asked for. > > Now, if softval takes non-interleaved from below and gives interleaved to the > layer above than it would need to rearrange those samples -- which it however > doesn't actually. PA hence checks with those asserts if the audio data is > properly arranged -- which it is not as we can see. > > This is a bug in ALSA's softvol module. Please report this on alsa-devel. > softvol falsely claims to be able to rearrange non-interleaved audio to > interleaved." > > Not sure what other information I should post here so I'll wait for any > feedback. Well, it's no bug in softvol, at least. The softvol doesn't do any format or layout conversions. The layout conversion is done via plug plugin applied onto the softvol. Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
