From 7586e95bf7d014eda3b5652eb4136f9fc6d15cb6 Mon Sep 17 00:00:00 2001
From: HikariKnight <2557889+HikariKnight@users.noreply.github.com>
Date: Wed, 18 Oct 2023 01:54:09 +0200
Subject: [PATCH] feat: add virtual audio channels for special usecases (#449)

---
 .../usr/share/ublue-os/just/60-custom.just    | 76 +++++++++++++++++++
 1 file changed, 76 insertions(+)

diff --git a/system_files/desktop/shared/usr/share/ublue-os/just/60-custom.just b/system_files/desktop/shared/usr/share/ublue-os/just/60-custom.just
index 3fa560a8..9c5c7a69 100644
--- a/system_files/desktop/shared/usr/share/ublue-os/just/60-custom.just
+++ b/system_files/desktop/shared/usr/share/ublue-os/just/60-custom.just
@@ -325,3 +325,79 @@ disable-watchdog:
 # Add SELinux file context for default looking-glass shm file so that libvirt can create it when needed
 selinux-looking-glass:
   sudo semanage fcontext -a -t svirt_tmpfs_t /dev/shm/looking-glass
+
+setup-virtual-channels:
+  #!/bin/bash
+  mkdir -p ~/.config/pipewire/pipewire.conf.d
+  cat << 'EOL' > ~/.config/pipewire/pipewire.conf.d/virtual-channels.conf
+  context.modules = [
+      { name = libpipewire-module-loopback
+          args = {
+              node.description = "Game"
+              capture.props = {
+                  node.name      = "game_output"
+                  media.class    = "Audio/Sink"
+                  audio.position = [ FL FR ]
+              }
+              playback.props = {
+                  node.name      = "playback.game_output"
+                  audio.position = [ FL FR ]
+                  node.passive   = true
+              }
+          }
+      }
+      { name = libpipewire-module-loopback
+          args = {
+              node.description = "Voice"
+              capture.props = {
+                  node.name      = "voice_output"
+                  media.class    = "Audio/Sink"
+                  audio.position = [ FL FR ]
+              }
+              playback.props = {
+                  node.name      = "playback.voice_output"
+                  audio.position = [ FL FR ]
+                  node.passive   = true
+              }
+          }
+      }
+      { name = libpipewire-module-loopback
+          args = {
+              node.description = "Browser"
+              capture.props = {
+                  node.name      = "browser_output"
+                  media.class    = "Audio/Sink"
+                  audio.position = [ FL FR ]
+              }
+              playback.props = {
+                  node.name      = "playback.browser_output"
+                  audio.position = [ FL FR ]
+                  node.passive   = true
+              }
+          }
+      }
+      { name = libpipewire-module-loopback
+          args = {
+              node.description = "Music"
+              capture.props = {
+                  node.name      = "music_output"
+                  media.class    = "Audio/Sink"
+                  audio.position = [ FL FR ]
+              }
+              playback.props = {
+                  node.name      = "playback.music_output"
+                  audio.position = [ FL FR ]
+                  node.passive   = true
+              }
+          }
+      }
+  ]
+  EOL
+  echo "Next time you log in, you will have audio channels for Game, Voice, Browser, Music that you can route game audio to"
+  echo "using programs like qpwgraph, helvum or carla."
+  echo "You can also add these channels to OBS audio mixer for separate audio control for yourself and your viewers."
+  echo "NOTE: It is recommended to mute the virtual channels so you do not have to listen to them twice if you are not exclusively routing the audio through said channel instead of splitting audio to them."
+
+remove-virtual-channels:
+  rm ~/.config/pipewire/pipewire.conf.d/virtual-channels.conf
+  echo "Virtual audio channels config removed, the channels will be removed next time you login."