* how to link multi plugin to dsnoop ?
@ 2011-05-11 13:35 Vincent Meserette
2011-05-11 16:57 ` Clemens Ladisch
0 siblings, 1 reply; 2+ messages in thread
From: Vincent Meserette @ 2011-05-11 13:35 UTC (permalink / raw)
To: ALSA Development Mailing List
Hi all,
I would like to allow multiple applications to access the audio inputs and
outputs of my system at same time.
I succeded to make it for the audio outputs by using the dmix plugin, but I
don't know how to do it with the dsnoop plugin because it seems I cannot
link directly the multi plugin to dsnoop.
Here is the error message I have with the /etc/asound.conf file presented
below :
arecord -D"alduplex" -c4 -r48000 -fS16_LE /tmp/test.wav
ALSA lib pcm_direct.c:1490:(_snd_pcm_direct_get_slave_ipc_offset) Invalid
type 'multi' for slave PCM
arecord: main:654: audio open error: Invalid argument
Does someone know how can I route the multi plugin to dsnoop ?
Thanks in advance
My /etc/asound.conf file :
#output device
pcm.AD1989A_outputs{
type hw
card 0
}
pcm.aldmix{
type dmix
ipc_key 1024
ipc_perm 0666
slave{
pcm AD1989A_outputs
}
}
#input device
pcm.4channelsDeinterleaved {
type multi
slaves.a.pcm "hw:0,0,0"
slaves.a.channels 2
slaves.b.pcm "hw:0,0,2"
slaves.b.channels 2
bindings.0.slave a
bindings.0.channel 0
bindings.1.slave a
bindings.1.channel 1
bindings.2.slave b
bindings.2.channel 0
bindings.3.slave b
bindings.3.channel 1
}
pcm.AD1989A_inputs {
type route
slave.pcm "4channelsDeinterleaved"
ttable.0.0 1
ttable.1.1 1
ttable.2.2 1
ttable.3.3 1
}
#4 channels dsnoop (plug-in for capture)
pcm.aldsnoop{
type dsnoop
ipc_key 1025
ipc_perm 0666
slave{
pcm AD1989A_inputs
rate 48000
channels 4
}
}
pcm.alduplex {
type asym
capture.pcm "aldsnoop"
playback.pcm "aldmix"
}
### CTL DEVICES (controls)
ctl.mixer0 {
type hw
card 0
}
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: how to link multi plugin to dsnoop ?
2011-05-11 13:35 how to link multi plugin to dsnoop ? Vincent Meserette
@ 2011-05-11 16:57 ` Clemens Ladisch
0 siblings, 0 replies; 2+ messages in thread
From: Clemens Ladisch @ 2011-05-11 16:57 UTC (permalink / raw)
To: Vincent Meserette; +Cc: ALSA Development Mailing List
Vincent Meserette wrote:
> Does someone know how can I route the multi plugin to dsnoop ?
The dmix/dshare/dsnoop plugins work only directly on a hardware device.
Use two dsnoop plugins on the hw devices, then tie them together with
a multi.
Regards,
Clemens
^ permalink raw reply [flat|nested] 2+ messages in thread
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2011-05-11 13:35 how to link multi plugin to dsnoop ? Vincent Meserette
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