Move node.pause-on-idle setting to config files

So that we can configure it.
Add some more docs to the config file

spa/plugins/alsa/alsa-pcm-sink.c

@@ -273,7 +273,6 @@ static const struct spa_dict_item node_info_items[] = {
 	{ SPA_KEY_DEVICE_API, "alsa" },
 	{ SPA_KEY_MEDIA_CLASS, "Audio/Sink" },
 	{ SPA_KEY_NODE_DRIVER, "true" },
-	{ SPA_KEY_NODE_PAUSE_ON_IDLE, "false" },
 };
 
 static void emit_node_info(struct state *this, bool full)

spa/plugins/alsa/alsa-pcm-source.c

@@ -275,7 +275,6 @@ static const struct spa_dict_item node_info_items[] = {
 	{ SPA_KEY_DEVICE_API, "alsa" },
 	{ SPA_KEY_MEDIA_CLASS, "Audio/Source" },
 	{ SPA_KEY_NODE_DRIVER, "true" },
-	{ SPA_KEY_NODE_PAUSE_ON_IDLE, "false" },
 };
 
 static void emit_node_info(struct state *this, bool full)

spa/plugins/bluez5/a2dp-sink.c

@@ -823,7 +823,6 @@ static const struct spa_dict_item node_info_items[] = {
 	{ SPA_KEY_MEDIA_CLASS, "Audio/Sink" },
 	{ SPA_KEY_NODE_DRIVER, "true" },
 	{ SPA_KEY_NODE_LATENCY, SPA_STRINGIFY(MIN_LATENCY)"/48000" },
-	{ SPA_KEY_NODE_PAUSE_ON_IDLE, "false" },
 };
 
 static void emit_node_info(struct impl *this, bool full)

spa/plugins/bluez5/a2dp-source.c

@@ -704,7 +704,6 @@ static void emit_node_info(struct impl *this, bool full)
 		{ SPA_KEY_DEVICE_API, "bluez5" },
 		{ SPA_KEY_MEDIA_CLASS, "Stream/Output/Audio" },
 		{ SPA_KEY_NODE_LATENCY, SPA_STRINGIFY(MIN_LATENCY)"/48000" },
-		{ SPA_KEY_NODE_PAUSE_ON_IDLE, "false" },
 		{ "media.name", ((this->transport && this->transport->device->name) ?
 		                 this->transport->device->name : "A2DP") },
 	};

spa/plugins/v4l2/v4l2-source.c

@@ -323,7 +323,6 @@ static const struct spa_dict_item info_items[] = {
 	{ SPA_KEY_DEVICE_API, "v4l2" },
 	{ SPA_KEY_MEDIA_CLASS, "Video/Source" },
 	{ SPA_KEY_MEDIA_ROLE, "Camera" },
-	{ SPA_KEY_NODE_PAUSE_ON_IDLE, "false" },
 	{ SPA_KEY_NODE_DRIVER, "true" },
 };
 

src/daemon/media-session.d/alsa-monitor.conf

@@ -1,5 +1,6 @@
 # alsa-monitor config file
 properties = {
+    # Create a JACK device
     #alsa.jack-device = true
 }
 
@@ -11,21 +12,52 @@ rules = [
         # matches work, the actions are executed for the object.
         matches = [
             {
-	        # this matches all cards
+	        # this matches all cards. These are regular expressions
+		# so "." matches one character and ".*" matches many.
                 device.name = "~alsa_card.*"
             }
         ]
         actions = {
             # actions can update properties on the matched object.
             update-props = {
+	        # Use ALSA-Card-Profile devices. They use UCM or
+		# the profile configuration to configure the device
+		# and mixer settings.
                 api.alsa.use-acp = 		true
+
+		# Use UCM instead of profile when available. Can be
+		# disabled to skip trying to use the UCM profile
                 #api.alsa.use-ucm = 		true
+
+		# Don't use the hardware mixer for volume control. It
+		# will only use software volume. The mixer is still used
+		# to mute unused paths based on the selected port
                 #api.alsa.soft-mixer = 		false
+
+                # Ignore Decibel settings of the driver. Can be used to
+		# work around buggy drivers that report wrong values
                 #api.alsa.ignore-dB = 		false
+
+                # The profile set to use for the device. Usually this
+		# "default.conf" but can be changed with a udev rule
+		# or here.
                 #device.profile-set = 		"profileset-name"
+
+		# The default active profile. Is by defaul set to "Off"
                 #device.profile = 		"default profile name"
+
+		# Automatically select the best profile. This is the
+		# highest priority available profile. This is disabled
+		# here and instead implemented in the session manager
+		# where it can save and load previous preferences
                 api.acp.auto-profile = 	false
+
+		# Automatically switch to the highest priority available
+		# port. This is disabled here and implemented in the
+		# session manager instead.
                 api.acp.auto-port = 	false
+
+		# Other properties can be set here
                 #device.nick = 			"My Device"
             }
         }
@@ -33,7 +65,8 @@ rules = [
     {
         matches = [
             {
-	        # matches all sinks
+	        # matches all sinks. These are regular expressions
+		# so "." matches one character and ".*" matches many.
                 node.name = "~alsa_input.*"
             }
             {
@@ -47,7 +80,7 @@ rules = [
                 #node.nick = 			null
                 #priority.driver = 		100
                 #priority.session = 		100
-                #node.pause-on-idle = 		false
+                node.pause-on-idle = 		false
                 #resample.quality = 		4
                 #channelmix.normalize =		false
                 #channelmix.mix-lfe = 		false

src/daemon/media-session.d/bluez-monitor.conf

@@ -54,7 +54,7 @@ rules = [
                 #node.nick = 			null
                 #priority.driver = 		100
                 #priority.session = 		100
-                #node.pause-on-idle = 		false
+                node.pause-on-idle = 		false
                 #resample.quality = 		4
                 #channelmix.normalize =		false
                 #channelmix.mix-lfe = 		false

src/daemon/media-session.d/v4l2-monitor.conf

@@ -38,7 +38,7 @@ rules = [
                 #node.nick = 			null
                 #priority.driver = 		100
                 #priority.session = 		100
-                #node.pause-on-idle = 		true
+                node.pause-on-idle = 		false
             }
         }
     }

src/daemon/pipewire.conf.in

@@ -41,52 +41,95 @@ spa-libs = {
 }
 
 modules = {
-    ##  <module-name> = { [args = "<key>=<value> ..."] 
+    ##  <module-name> = { [args = { <key>=<value> ... }]
-    #                     [flags = [ifexists]|[nofail]}
+    #                     [flags = "[ifexists]|[nofail]"}
     #
     # Loads a module with the given parameters.
     # If ifexists is given, the module is ignoed when it is not found.
     # If nofail is given, module initialization failures are ignored.
     #
+
+    # Uses RTKit to boost the data thread priority
     libpipewire-module-rtkit  = {
-        "#args" = { nice.level = -11
+        args = {
-	            rt.prio = 20
+            #nice.level = -11
-                    rt.time.soft = 200000
+            #rt.prio = 20
-                    rt.time.hard = 200000 }
+            #rt.time.soft = 200000
-        "flags" = "ifexists|nofail"
+            #rt.time.hard = 200000
 	}
+        flags = "ifexists|nofail"
+    }
+
+    # The native communication protocol
     libpipewire-module-protocol-native = null
+
+    # The profile module. Allows application to access profiler
+    # and performance data. It provides an interface that is used
+    # by pw-top and pw-profiler.
     libpipewire-module-profiler = null
+
+    # Allows applications to create metadata objects. It creates
+    # a factory for Metadata objects.
     libpipewire-module-metadata = null
+
+    # Creates a factory for making devices that run in the
+    # context of the PipeWire server.
     libpipewire-module-spa-device-factory = null
+
+    # Creates a factory for making nodes that run in the
+    # context of the PipeWire server.
     libpipewire-module-spa-node-factory = null
+
+    # Allows creating nodes that run in the context of the
+    # client. Is used by all clients that want to provide
+    # data to PipeWire.
     libpipewire-module-client-node = null
+
+    # Allows creating devices that run in the context of the
+    # client. Is used by the session manager.
     libpipewire-module-client-device = null
+
+    # The portal module monitors the PID of the portal process
+    # and tags connections with the same PID as portal
+    # connections.
     libpipewire-module-portal = null
+
+    # The access module can perform acces checks and block
+    # new clients.
     libpipewire-module-access = {
-        "#args" = {
+        args = {
             # access.allowed to list an array of paths of allowed
             # apps.
-                    access.allowed = [
+            #access.allowed = [
-		          @media_session_path@
+            #    @media_session_path@
-	            ]
+            #]
+
             # an array of rejected paths
-		    access.rejected = [ ]
+            #access.rejected = [ ]
+
             # an array of paths with restricted access
-		    access.restricted = [ ]
+            #access.restricted = [ ]
+
             # anything not in the above lists gets assigned the
             # access.force permission.
-                    access.force = flatpak
+            #access.force = flatpak
         }
     }
+
+    # Makes a factory for wrapping nodes in an adapter with a
+    # converter and resampler.
     libpipewire-module-adapter = null
+
+    # Makes a factory for creating links between ports
     libpipewire-module-link-factory = null
+
+    # Provides factories to make session manager objects
     libpipewire-module-session-manager = null
 }
 
 objects = {
-    ## <factory-name> = { [args = "<key>=<value> ..."]
+    ## <factory-name> = { [args = { <key>=<value> ... } ]
-    #                     [flags = nofail] }
+    #                     [flags = "nofail"] }
     #
     # Creates an object from a PipeWire factory with the given parameters.
     # If nofail is given, errors are ignored (and no object is created)
@@ -101,7 +144,8 @@ objects = {
     # A default dummy driver. This handles nodes marked with the "node.always-driver"
     # property when no other driver is currently active. JACK clients need this.
     spa-node-factory = {
-        args = { factory.name = support.node.driver
+        args = {
+            factory.name = support.node.driver
             node.name = Dummy-Driver
             priority.driver = 8000
         }