[pulseaudio-discuss] Alsa bindings and snd_pcm_hw_params (bug?)

Hynek Hanke hanke at brailcom.org
Wed Apr 2 03:37:11 PDT 2008


please, I've just found that my software refuses to work with Pulse 
Audio through ALSA because  the Pulse Audio ALSA module refuses to let 
me call snd_pcm_hw_params when alsa state is PREPARED. (In practice, I 
can only call snd_pcm_hw_params once for every connection to ALSA and 
subsequent calls will fail).

This behavior has also been partly described here:

However, as Takashi Iwai describes in his reply to the above email, this 
is not a correct behavior. ALSA API Reference doesn't mention that 
snd_pcm_hw_params could not be called while in state PREPARED.

Please, am I correct that this is a bug or am I missing something? Is 
anybody working on it? Is there some  workaround except for closing and 
openning  ALSA connection each time I need to change the parameters 
(which I trully don't want to do)?

Thank you,
Hynek Hanke

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