Re: [Protux-devel] Good news about 0.17.1

[Martin Herren]

Luciano Giordana wrote:

> > the funny thing is that protux-bus 0 tries to open hw:0,2, and protux-bus 1
> > tries to open hw:0,1... and there is no way to select hw:0.0...
> I am "detecting" the cards/devices/buses by inspecting /proc/asound/cardX 
> directories. This is not the good way to do this, but I couldnt find a 
> correct way to detect the buses/devices using the ALSA API.
haven't found any other way to do it too...

> if there is no 
> hw:0,0, then it is because there is no /proc/asound/card0/pcm0p (or if you 
> mean capture buses, so there is no /proc/asound/card0/pcm0c)
there is, and at startup Protux detects all 3 capture interfaces (see 
--d1 output in one of precedent mails):

address@hidden:~$ ls /proc/asound/card0/
ac97#0        fx8010_code       id     oss_mixer  pcm2c
ac97#0regs    fx8010_gpr        midi0  pcm0c      pcm3p
emu10k1       fx8010_tram_addr  midi1  pcm0p      wavetableD1
fx8010_acode  fx8010_tram_data  midi2  pcm1c

it's just that the input BusSelector shows only 2 buses... so the error 
is perhaps there.

> Note that I DONT KNOW if there is a relation between hw:X,Y and these 
> directories.. I am workin in the dark with ALSA stuff..
>
>
> the alsa questions are still the same 
>
>
> 1) is hw:X,Y linked to /proc/asound/cardX/pcmZY ? (Z is c or p)
according to the test i did, this is correct, but haven't found an 
official answer in the alsa doc.

> 2) what exactly is a PCM for alsa ? Why a SB Live has 2 PCM devices ??
afaik the analog and the digital are two independent outpus, so there 
are 2 pcmYp devices.

> 7) which is the best way (and code example)  to inspect all cards and ONLY its 
> AUDIO (WAVE/PCM/DSP, whatever ) devices ?  
as far as i understood, each pcmYZ under /proc/asound/cardX/ is an 
independant pcm device, and can be used as as independant input (Z = c) 
or as an independant outpu (Z = p)

but i don't know how to get the list of the devices without scanning 
/proc/asound/

/Martin