Thierry Bouchard wrote:
> I wrote a simple plugin for my microphone which is supposed to convert the
> data into a 32 bps format. Here is how it looks like :
>
> pcm.jcb-in-1 {
> type hw
> card 0
> device 2
> }
> pcm.MicPlug
> {
> type plug
> slave
> {
> pcm jcb-in-1
> format S32_LE
> }
> }
>
> So now if Im opening the PCM device named MicPlug and start reading on it, Im
> expecting (which may totally be wrong) that the data I read will be in a
> 32bps format, which is never happening. In fact, the data I read is exactly
> in the format that I set using "snd_pcm_hw_params_set_format". Is the
> conversion supposed to happen or am I expecting something that is totally
> wrong?
This works the other way round: The slave device (the hardware device)
is forced to use 32-bit samples, but the MicPlug device converts the
samples to whatever format is requested (that's what "plug" does).
If your application wants to use 32-bit samples, it should just request
this format.
> Also is there any good documentation about how the asound.conf file works?
Not really. What do you want to do?
Regards,
Clemens
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