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Date: Tue, 26 Jul 2005 21:42:16 +0800
From: Yuka Muromachi <yuka.muromachi@gmail.com>
To: freebsd-multimedia@freebsd.org
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Subject: The device name
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Hi:

I'm trying to written Azalia (HD Audio) support for freebsd now.
The controller part is working, I'm trying to add codec support now.

There is a question:

most sound device attach function will call those two line to create
/dev/audio* , /dev/dsp*, /dev/dspW* and /dev/dspr*:

pcm_addchan(dev, PCMDIR_REC, &ad1816chan_class, ad1816);
pcm_addchan(dev, PCMDIR_PLAY, &ad1816chan_class, ad1816);

pcm_addchan() will call pcm_chn_add()

But, I do not understand, why direction =3D PCMDIR_REC
will still create one more /dev/audio , /dev/dspW, /dev/dspr=20
device?

My mean, that code will create /dev/audio0.0 /dev/audio0.1 ...
and /dev/dspr0.0