music/librespot: Use jackaudio backend

roles/music/handlers/main.yaml

@@ -48,7 +48,7 @@
 
 - name: rebuild librespot
   ansible.builtin.command:
-    cmd: /root/.cargo/bin/cargo build --release --features pulseaudio-backend
+    cmd: /root/.cargo/bin/cargo build --release --features pulseaudio-backend,jackaudio-backend
   args:
     chdir: /opt/librespot
 

roles/music/tasks/bitvis.yaml

@@ -4,6 +4,7 @@
     name:
       - bitvis
       - bitvis-http
+      - swh-plugins
 
 - name: Create bitvis user
   user:

roles/music/tasks/librespot.yaml

@@ -1,4 +1,11 @@
 ---
+- name: Install apt dependencies
+  apt:
+    name:
+      - libasound2-dev
+      - libjack-dev
+      - pkg-config
+
 - name: Create librespot user
   user:
     name: "{{ music_librespot_user }}"

roles/music/templates/librespot.service

@@ -7,10 +7,14 @@ After=network.target
 [Service]
 Type=simple
 Restart=always
-RestartSec=2s
+RestartSec=10s
-ExecStart=/opt/librespot/target/release/librespot --name Trollibox --backend pulseaudio --volume-ctrl linear
+ExecStart=/usr/bin/pw-jack -s 44100 /opt/librespot/target/release/librespot --name Trollibox --backend jackaudio
-Environment="PULSE_SERVER={{ music_pulse_server }}"
+ExecStartPost=/usr/bin/sleep 4
-User={{ music_librespot_user }}
+ExecStartPost=-/usr/bin/pw-link librespot:out_0 alsa_output.usb-ASUS_Xonar_U7_MKII-00.analog-stereo:playback_FL
+ExecStartPost=-/usr/bin/pw-link librespot:out_1 alsa_output.usb-ASUS_Xonar_U7_MKII-00.analog-stereo:playback_FR
+# User={{ music_librespot_user }}
+User=root
+Environment="XDG_RUNTIME_DIR=/run/user/{{ music_audio_user_id }}"
 
 [Install]
 WantedBy=multi-user.target

roles/music/templates/pw-bitvis-mixer.conf

@@ -9,17 +9,28 @@ context.modules = [
             filter.graph = {
                 nodes = [
                     {
-                        name   = mix
+                        name    = normalize
-                        type   = builtin
+                        type    = ladspa
-                        label  = mixer
+                        plugin  = fast_lookahead_limiter_1913
+                        label   = fastLookaheadLimiter
                         control = {
-                          "Gain 1" = 10
+                            "Input gain (dB)" = 40
-                          "Gain 2" = 10
+                            "Limit (dB)" = 0
+                            "Release time (s)" = 1
                         }
                     }
+                    {
+                        name  = mono
+                        type  = builtin
+                        label = mixer
+                    }
                 ]
-                inputs  = [ "mix:In 1" "mix:In 2" ]
+                links = [
-                outputs = [ "mix:Out" ]
+                    { output = "normalize:Output 1", input = "mono:In 1" }
+                    { output = "normalize:Output 2", input = "mono:In 2" }
+                ]
+                inputs  = [ "normalize:Input 1" "normalize:Input 2" ]
+                outputs = [ "mono:Out" ]
             }
             capture.props = {
                 node.name         = "mix_input.bitvis"