On 01/14/2014 10:30 AM, David Henningsson wrote:
> Both these require some alsa-lib coding, so another option is still to
> write a separate PulseAudio profile. :-)
Here's an example of how such a profile could look like (attached, put
this file in /usr/share/pulseaudio/alsa-mixer/profile-sets). I tested
with the following row added somewhere in the middle of
/lib/udev/rules.d/90-pulseaudio.rules:
SUBSYSTEMS=="firewire", ENV{PULSE_PROFILE_SET}="multichannel.conf"
...but we might want a better match than just "firewire" in order not to
catch the firewire speakers (if they have normal alsa mixers instead of
hwdep control).
Note to other PA developers: one could argue what channel map (aux
channels or surround channels) to have for the multi channel devices.
Since many applications support surround output, I went for the more
pragmatic approach here. But it's not set in stone.
--
David Henningsson, Canonical Ltd.
https://launchpad.net/~diwic
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# for generic multichannel devices.
[General]
auto-profiles = yes
[Mapping 2-channels]
device-strings = hw:%f
channel-map = front-left,front-right
description = 2 Channels
priority = 2
[Mapping 4-channels]
device-strings = hw:%f
channel-map = front-left,front-right,rear-left,rear-right
description = 4 Channels
priority = 4
[Mapping 6-channels]
device-strings = hw:%f
channel-map = front-left,front-right,rear-left,rear-right,front-center,lfe
description = 6 Channels
priority = 6
[Mapping 8-channels]
device-strings = hw:%f
channel-map = front-left,front-right,rear-left,rear-right,front-center,lfe,side-left,side-right
description = 8 Channels
priority = 8
[Mapping 10-channels]
device-strings = hw:%f
channel-map = front-left,front-right,rear-left,rear-right,front-center,lfe,side-left,side-right,aux0,aux1
description = 10 Channels
priority = 10
[Mapping 12-channels]
device-strings = hw:%f
channel-map = front-left,front-right,rear-left,rear-right,front-center,lfe,side-left,side-right,aux0,aux1,aux2,aux3
description = 12 Channels
priority = 12
[Mapping 14-channels]
device-strings = hw:%f
channel-map = front-left,front-right,rear-left,rear-right,front-center,lfe,side-left,side-right,aux0,aux1,aux2,aux3,aux4,aux5
description = 14 Channels
priority = 14
[Mapping 16-channels]
device-strings = hw:%f
channel-map = front-left,front-right,rear-left,rear-right,front-center,lfe,side-left,side-right,aux0,aux1,aux2,aux3,aux4,aux5,aux6,aux7
description = 16 Channels
priority = 16
[Mapping 18-channels]
device-strings = hw:%f
channel-map = front-left,front-right,rear-left,rear-right,front-center,lfe,side-left,side-right,aux0,aux1,aux2,aux3,aux4,aux5,aux6,aux7,aux8,aux9
description = 18 Channels
priority = 18
