Add support for noise suppression on Linux using rnnoise.

This uses: https://github.com/werman/noise-suppression-for-voice .

ansible/playbook.yaml

@@ -54,6 +54,7 @@
     - lvfs
     - restaurant_health_rating
     - wasm
+    - noise_suppression
 
 - hosts: nat_dhcp:homeserver_nat_dhcp:mrmanager_nat_dhcp
   vars:

ansible/roles/noise_suppression/files/99-input-denoising.conf

@@ -0,0 +1,33 @@
+context.modules = [
+{   name = libpipewire-module-filter-chain
+    args = {
+        node.description =  "Noise Canceling source"
+        media.name =  "Noise Canceling source"
+        filter.graph = {
+            nodes = [
+                {
+                    type = ladspa
+                    name = rnnoise
+                    plugin = /usr/lib/ladspa/librnnoise_ladspa.so
+                    label = noise_suppressor_mono
+                    control = {
+                        "VAD Threshold (%)" = 50.0
+                        "VAD Grace Period (ms)" = 200
+                        "Retroactive VAD Grace (ms)" = 0
+                    }
+                }
+            ]
+        }
+        capture.props = {
+            node.name =  "capture.rnnoise_source"
+            node.passive = true
+            audio.rate = 48000
+        }
+        playback.props = {
+            node.name =  "rnnoise_source"
+            media.class = Audio/Source
+            audio.rate = 48000
+        }
+    }
+}
+]

ansible/roles/noise_suppression/meta/main.yaml

@@ -0,0 +1,3 @@
+dependencies:
+  - users
+  - sound

ansible/roles/noise_suppression/tasks/common.yaml

@@ -0,0 +1,55 @@
+# - name: Create directories
+#   file:
+#     name: "{{ item }}"
+#     state: directory
+#     mode: 0755
+#     owner: root
+#     group: wheel
+#   loop:
+#     - /foo/bar
+
+# - name: Install scripts
+#   copy:
+#     src: "files/{{ item.src }}"
+#     dest: "{{ item.dest }}"
+#     mode: 0755
+#     owner: root
+#     group: wheel
+#   loop:
+#     - src: foo.bash
+#       dest: /usr/local/bin/foo
+
+# - name: Install Configuration
+#   copy:
+#     src: "files/{{ item.src }}"
+#     dest: "{{ item.dest }}"
+#     mode: 0600
+#     owner: root
+#     group: wheel
+#   loop:
+#     - src: foo.conf
+#       dest: /usr/local/etc/foo.conf
+
+# - name: Clone Source
+#   git:
+#     repo: "https://foo.bar/baz.git"
+#     dest: /foo/bar
+#     version: "v1.0.2"
+#     force: true
+#   diff: false
+
+- import_tasks: tasks/freebsd.yaml
+  when: 'os_flavor == "freebsd"'
+
+- import_tasks: tasks/linux.yaml
+  when: 'os_flavor == "linux"'
+
+- include_tasks:
+    file: tasks/peruser.yaml
+    apply:
+      become: yes
+      become_user: "{{ initialize_user }}"
+  when: users is defined
+  loop: "{{ users | dict2items | community.general.json_query('[?value.initialize==`true`].key') }}"
+  loop_control:
+    loop_var: initialize_user

ansible/roles/noise_suppression/tasks/freebsd.yaml

@@ -0,0 +1,5 @@
+# - name: Install packages
+#   package:
+#     name:
+#       - foo
+#     state: present

ansible/roles/noise_suppression/tasks/linux.yaml

@@ -0,0 +1,5 @@
+- name: Install packages
+  package:
+    name:
+      - noise-suppression-for-voice
+    state: present

ansible/roles/noise_suppression/tasks/main.yaml

@@ -0,0 +1,2 @@
+- import_tasks: tasks/common.yaml
+  # when: foo is defined

ansible/roles/noise_suppression/tasks/peruser.yaml

@@ -0,0 +1,8 @@
+- include_role:
+    name: per_user
+
+- import_tasks: tasks/peruser_freebsd.yaml
+  when: 'os_flavor == "freebsd"'
+
+- import_tasks: tasks/peruser_linux.yaml
+  when: 'os_flavor == "linux"'

ansible/roles/noise_suppression/tasks/peruser_linux.yaml

@@ -0,0 +1,21 @@
+- name: Create directories
+  file:
+    name: "{{ account_homedir.stdout }}/{{ item }}"
+    state: directory
+    mode: 0700
+    owner: "{{ account_name.stdout }}"
+    group: "{{ group_name.stdout }}"
+  loop:
+    # Could also use /etc/pipewire/pipewire.conf.d/ for system-wide config.
+    - ".config/pipewire/pipewire.conf.d"
+
+- name: Copy files
+  copy:
+    src: "files/{{ item.src }}"
+    dest: "{{ account_homedir.stdout }}/{{ item.dest }}"
+    mode: 0600
+    owner: "{{ account_name.stdout }}"
+    group: "{{ group_name.stdout }}"
+  loop:
+    - src: 99-input-denoising.conf
+      dest: .config/pipewire/pipewire.conf.d/