[alsa-devel] snd_pcm_open fails with -16 error

[Clemens Ladisch]

irfan shaikh wrote:
>                In my application i am closing and reopening my device to
> configure some hw_params for audio frequency change.

You should just set new hw_params on the same device.

> Close of PCM device is success, but reopen the same device fails
> 
> I get an below error
> snd_pcm_open() FAIL with return value -16 {Device or resource busy}

IIRC this could happen when using dmix on some old alsa-lib version.

> I have even tried to configure the HW params in run time to avoid above
> closing and opening of device.
> But run time HW params configuartion failed.

Thank you very much for keeping the error code a secret.

> Is there any way to change HW params at run time ? {My PCM device are in
> RUNNING state and i want to change HW params at run time}

Stop the device first.


Regards,
Clemens


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