Greetings,
I want to make a universal multi mapping. So far I have the following 4
channel version based on
http://www.alsa-project.org/alsa-doc/doc-php/asoundrc.php#jackplug
But it has some shortcomings I'd like to fix, don't know how
Q1: is there any way I can inherit all the @args [ CARD DEV SUBDEV ] etc from
a common definition somewhere.
Q2: can I get the actual assigned subdevice index for slaves.a, and use it to
calculate the subdev for slaves.b
Because using "ttable4:1,0,0" works but "ttable4:1" doesnt because of the
calculation of the 2nd subdevice index:
subdevice { @func iadd integers [ $SUBDEV 1 ] }
Q3: I'd like to parameterise the number of channels, so I can make 3,4,5,6,7,
or 8 channel. Can I do this rather than repeat the whole thing 6 times with
differing channel counts? ?Another way to ask this may be "Can I use looping
constructs in asoundrc?"
for n in 0 to 5:
ttable.$n.$n 1
pcm.ttable4 {
@args [ CARD DEV SUBDEV ]
@args.CARD {
type string
default {
@func getenv
vars [
ALSA_PCM_CARD
ALSA_CARD
]
default {
@func refer
name defaults.pcm.card
}
}
}
@args.DEV {
type integer
default {
@func igetenv
vars [
ALSA_PCM_DEVICE
]
default {
@func refer
name defaults.pcm.device
}
}
}
@args.SUBDEV {
type integer
default 0
}
type route;
hint {
show {
@func refer
name defaults.namehint.basic
}
description "4 channel multi route"
}
slave.pcm {
type multi;
slaves.a.pcm {
type hw
card $CARD
device $DEV
subdevice $SUBDEV
#mmap_emulation true
}
slaves.a.channels 2;
slaves.b.pcm {
type hw
card $CARD
device $DEV
subdevice { @func iadd integers [ $SUBDEV 1 ] }
#mmap_emulation true
}
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;
}
ttable.0.0 1;
ttable.1.1 1;
ttable.2.2 1;
ttable.3.3 1;
}
thanks
--
Eliot
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