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Re: [Protux-devel] Good news about 0.17.1
From: |
Luciano Giordana |
Subject: |
Re: [Protux-devel] Good news about 0.17.1 |
Date: |
Mon, 10 Feb 2003 02:27:14 -0200 |
User-agent: |
KMail/1.4.3 |
> 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. 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)
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)
2) what exactly is a PCM for alsa ? Why a SB Live has 2 PCM devices ??
SO I have 4 output channes is a SB LIVE ? or one is for the right channel and
the other is for left channel ? Or PCM is not what it seems to be, and it is
just a EXTERNAL OUTPUT , such headphone, line out, or something like that ?
I this case PCM is a bad name , because I understand PCM as a place to send
audio samples... (called "bus out", in protux...), as OSS called as /dev/dspX
3) what is a subdevice for alsa ?
4) why I cant set period size to X when the API says that the minimum is A and
maximum is B and A < X < B ?
5) Why I get a segfault when I try snd_pcm_hw_params_free() ?
6) why numPeriods have to be 2 always ?
7) which is the best way (and code example) to inspect all cards and ONLY its
AUDIO (WAVE/PCM/DSP, whatever ) devices ?
Regards
- [Protux-devel] Good news about 0.17.1, Luciano Giordana, 2003/02/07
- Re: [Protux-devel] Good news about 0.17.1, Martin Herren, 2003/02/09
- Re: [Protux-devel] Good news about 0.17.1, Martin Herren, 2003/02/09
- Re: [Protux-devel] Good news about 0.17.1, Luciano Giordana, 2003/02/09
- Re: [Protux-devel] Good news about 0.17.1, Martin Herren, 2003/02/10
- Re: [Protux-devel] SampleRate detecting code ! [was: Good news about 0.17.1], Martin Herren, 2003/02/10
- Re: [Protux-devel] SampleRate detecting code !, Martin Herren, 2003/02/10