filter-chain: add rnnoise example source

src/daemon/filter-chain/meson.build

@@ -1,5 +1,6 @@
 conf_files = [
   [ 'demonic.conf', 'demonic.conf' ],
+  [ 'source-rnnoise.conf', 'source-rnnoise.conf' ],
 ]
 
 foreach c : conf_files

src/daemon/filter-chain/source-rnnoise.conf

@@ -0,0 +1,61 @@
+# Noise canceling source
+#
+# start with pipewire -c filter-chain/source-rnnoise.conf
+#
+context.properties = {
+    log.level        = 0
+}
+
+context.spa-libs = {
+    audio.convert.* = audioconvert/libspa-audioconvert
+    support.*       = support/libspa-support
+}
+
+context.modules = [
+    {   name = libpipewire-module-rtkit
+        args = {
+            #nice.level   = -11
+            #rt.prio      = 88
+            #rt.time.soft = 200000
+            #rt.time.hard = 200000
+        }
+        flags = [ ifexists nofail ]
+    }
+    {   name = libpipewire-module-protocol-native }
+    {   name = libpipewire-module-client-node }
+    {   name = libpipewire-module-client-device }
+    {   name = libpipewire-module-adapter }
+
+    {   name = libpipewire-module-filter-chain
+        args = {
+            #node.latency = <latency as fraction>
+            node.name =  "rnnoise_source"
+            node.description =  "Noise Canceling source"
+            media.name =  "Noise Canceling source"
+            #audio.rate = <sample rate>
+            #audio.channels = <number of channels>
+            #audio.position = <channel map>
+            filter.graph = {
+                nodes = [
+                    {
+                        type = ladspa
+                        name = rnnoise
+                        plugin = ladspa/librnnoise_ladspa
+                        label = noise_suppressor_stereo
+                        control = {
+		            "VAD Threshold (%)" 50.0
+                        }
+                    }
+                ]
+                inputs = [ "rnnoise:Input (L)" "rnnoise:Input (R)" ]
+                outputs = [ "rnnoise:Output (L)" "rnnoise:Output (R)" ]
+            }
+            capture.props = {
+	        node.passive = true
+	    }
+            playback.props = {
+	        media.class = Audio/Source
+	    }
+	}
+    }
+]