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spa: add audio.layout property

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Makes it possible to define audio channels and position with a
predefined layout string.

It is easier and less error prone to say "5.1" than to spell out
[ FL FR FC LFE RL RR ].

AUX channels have a special syntax. AUX<N> will make <N> AUX
channels. Easier to say AUX128 than to write an array with the
128 AUX channels.
This commit is contained in:
Wim Taymans 2025-10-30 11:35:03 +01:00
parent 056f257058
commit 8ba08f3029
7 changed files with 151 additions and 0 deletions
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doc/dox/config/pipewire-props.7.md
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@ -843,6 +843,9 @@ The audio format to open the device in. By default this is "UNKNOWN", which will
@PAR@ node-prop audio.position # JSON array of strings
The audio position of the channels in the device. This is auto detected based on the profile. You can configure an array of channel positions, like "[ FL, FR ]".
@PAR@ node-prop audio.layout # string
The audio layout of the channels in the device. You can use any of the predefined layouts, like "Stereo", "5.1" etc.
@PAR@ node-prop audio.allowed-rates # JSON array of integers
\parblock
The allowed audio rates to open the device with. Default is "[ ]", which means the device can be opened in any supported rate.