Add filter and stream properties

Mostly latency but also adapter properties for streams.

src/daemon/client-rt.conf.in

@@ -63,3 +63,14 @@ context.modules = {
     # Provides factories to make session manager objects.
     libpipewire-module-session-manager = null
 }
+
+filter.properties = {
+    #node.latency = 1024/48000
+}
+
+stream.properties = {
+    #node.latency = 1024/48000
+    #resample.quality = 4
+    #channelmix.normalize = false
+    #channelmix.mix-lfe = false
+}

src/daemon/client.conf.in

@@ -52,3 +52,14 @@ context.modules = {
     # Provides factories to make session manager objects.
     libpipewire-module-session-manager = null
 }
+
+filter.properties = {
+    #node.latency = 1024/48000
+}
+
+stream.properties = {
+    #node.latency = 1024/48000
+    #resample.quality = 4
+    #channelmix.normalize = false
+    #channelmix.mix-lfe = false
+}

src/pipewire/filter.c

@@ -994,6 +994,8 @@ filter_new(struct pw_context *context, const char *name,
 		res = -errno;
 		goto error_properties;
 	}
+	if ((str = pw_context_get_conf_section(context, "filter.properties")) != NULL)
+		pw_properties_update_string(props, str, strlen(str));
 
 	if (pw_properties_get(props, PW_KEY_NODE_NAME) == NULL && extra) {
 		str = pw_properties_get(extra, PW_KEY_APP_NAME);

src/pipewire/stream.c

@@ -1176,6 +1176,8 @@ stream_new(struct pw_context *context, const char *name,
 		res = -errno;
 		goto error_properties;
 	}
+	if ((str = pw_context_get_conf_section(context, "stream.properties")) != NULL)
+		pw_properties_update_string(props, str, strlen(str));
 
 	if (pw_properties_get(props, PW_KEY_STREAM_IS_LIVE) == NULL)
 		pw_properties_set(props, PW_KEY_STREAM_IS_LIVE, "true");