-----
I first started experimenting with the stereo -> 5.1 configuration and got it to work great!
Then in the interests of everyone sharing the card, I fiddled around with dmixing the new 5.1 device and succeeded - now stereo apps are upmixed to 5.1, share with each other, AND share with real 5.1 apps.
Then I tried to throw OSS into the mix using AOSS. Here's where my problem is...
A stereo OSS app DOES work in the configuration - for a very short amount of time. After a variable amount of time (1 to 5 minutes, roughly) the OSS app will be cruising along and then the next time it tries to play a sound, it will freeze. Not because the sound card is blocked, because it happens when nothing else is accessing the card. But, in the process of freezing, it does block the sound card as nothing else (ALSA or OSS) can use it until I kill the OSS app.
After it happens once, it seems to happen very quickly every subsequent time until I reboot. By very quickly, I mean the OSS app may get one or two sounds off before it freezes 10 seconds into execution.
Here is the asound.conf I am using -
pcm.!default{
type plug
slave.pcm "dsp0"
}pcm.dsp0{
type plug
slave {
pcm "mixed51"
channels 6
rate 48000
}
ttable.0.0 1
ttable.1.1 1
ttable.0.2 1
ttable.1.3 1
ttable.0.4 0.2
ttable.1.4 0.2
ttable.0.5 0.5
ttable.1.5 0.5
}pcm.mixed51 {
type dmix
ipc_key 1099234
ipc_key_add_uid TRUE
slave {
pcm "hw:0,1"
rate 48000
channels 6
period_time 0
period_size 1024
buffer_time 0
buffer_size 4096
}
}ctl.mixer0 {
type hw
card 0
}My soundcard is a CMIPCI (8738) and I am running ALSA 1.04_rc2, as included in kernel 2.6.5. Notice the hardware device is hw:0,1 as that is the 5.1 device for this card.
The way I use this setup is as follows -
-OSS apps using AOSS obviously route directly to dsp0. That upmixes the stereo to 5.1 then uses mixed51 to dmix it.
-Stereo ALSA apps using the default PCM get rerouted to dsp0, or alternately I tell them specifically to use dsp0
-5.1 ALSA apps I tell to use mixed51 directly as they don't need the stereo->5.1 hack but DO need to share the card via dmix
Any explanations or solutions are MUCH appreciated - even if the official developer explanation is "don't do that, it doesn't work" tia
-Brady --- [This E-mail has been scanned by Declude Virus running on mail.rwgusa.net and is virus-free]
-------------------------------------------------------
This SF.Net email is sponsored by: Oracle 10g
Get certified on the hottest thing ever to hit the market... Oracle 10g. Take an Oracle 10g class now, and we'll give you the exam FREE.
http://ads.osdn.com/?ad_id=3149&alloc_id=8166&op=click
_______________________________________________
Alsa-devel mailing list
[EMAIL PROTECTED]
https://lists.sourceforge.net/lists/listinfo/alsa-devel
