[alsa-devel] open sound device from asound.conf

[Peter Lukac]

> Am 23.07.2010 11:12, schrieb Peter Lukac:
> > hello all
> > maybe trivial question...
> >
> > I want open sound device from /etc/asound.conf with API
> > snd_pcm_open() but unsuccessfull. As name i'm used:
> >
> > "plughw:0,0"
> > "plughw:0,1"
> > "plughw:0,2"
> > "plughw:1,0"
> > "plughw:1,1"
> > "plughw:1,2"
> > ...
> > i'm try alternative name with "hw:X,Y"
> > "hw:0,0"
> > "hw:0,1"
> > ...
> > but in this method i'm open only HW device.
> > I'm get follow error:
> > ALSA lib pcm_hw.c:1429:(_snd_pcm_hw_open) Invalid value for card
> >
> > how can i open my "virtual" device in asound.conf
> >
> > here is asound.conf:
> >
> >
> > pcm.!default {
> >         type plug
> >         slave.pcm "output"
> >     }
> >
> > pcm.output {
> >     type dmix
> >     ipc_key 1024
> >     slave {
> >         pcm "hw:0,0"
> >         channels 2
> >         rate 44100
> >         format S16_LE
> >     }
> > }
> >
> > pcm.dsp0 {
> >     type plug
> >     slave.pcm "output"
> > }
> >
> > ...exists some universal method how can i open all HW device and
> > "virtual" devices?
>
> Did you try to open "default", "output" or "dsp0" since these are the
> names of your pcm defines?

thanks for reply...
Yes it works..(device is open) but i don't want open device with "hard coded" 
name because this name can be changed..I want to use iterations