On Tue, Sep 8, 2009 at 5:10 PM, Takashi Iwaitiwai@suse.de wrote:
Don't pass '=', e.g.
# echo channels_max 3 > /proc/..../dummy_pcm
Thanks, with your hint I was able to write to the proc file.
I confirm that the Skype client works well if I put (writing to the proc file, without modifying the driver source): buffer_bytes_max=1024 and period_bytes_max=512, and that it works bad if I do not write on the /proc file.
It would be very very very nice if you add this proc interface (or another method to alter those buffer and period values) also to the non-debug build, so users can be able to use the standard distributed prepackaged ALSA drivers, without resorting to editing source or recompiling.
BTW: Would you mind to bump the MAX_PCM_SUBSTREAMS to 128? Currently is 16, and is a cap to the substreams actually created, by a configurable param default to 8. (people use routinely 20 concurrent Skype clients, 40 substreams. But there is juice in modern servers to have some more. 64 seems roomy enough [Skype client itself uses lot of cpu]).
Thanks for all your efforts,
-giovanni