[alsa-devel] PCM parameters in file plugin

Pavel Hofman pavel.hofman at insite.cz
Tue Jan 6 10:51:17 CET 2009

Pavel Hofman napsal(a):
> Hello,
> I am working on a file plugin patch to allow adding PCM parameters 
> (rate, format) to  the name of the file created (plus the ability to run 
> an external command via popen, such as upsampling with sox). I got stuck 
> in trying to obtain these parameters in pcm_file.c:_snd_pcm_file_open(). 
> Is it actually possible or the information is not available at the time 
> of opening the file (and the whole patch is thus nonsense)?
> Thanks a lot for help.

I am now opening the output file in pcm_file.c:snd_pcm_file_write_bytes.
Surprisingly it seems to work fine. Could such hack be accepted as a
patch to the plugin (if coded properly)? Is there a better place to open 
the file?




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