pulse-server: request dbus name

Request the org.pulseaudio.Server dbus name. This makes gnome-shell
reconnect automatically.

src/modules/meson.build

@@ -88,6 +88,12 @@ pipewire_module_protocol_native = shared_library('pipewire-module-protocol-nativ
   dependencies : pipewire_module_protocol_deps,
 )
 
+pipewire_module_protocol_pulse_deps = pipewire_module_protocol_deps
+
+if dbus_dep.found()
+  pipewire_module_protocol_pulse_deps += dbus_dep
+endif
+
 pipewire_module_protocol_pulse = shared_library('pipewire-module-protocol-pulse',
   [ 'module-protocol-pulse.c',
     'module-protocol-pulse/pulse-server.c',
@@ -97,7 +103,7 @@ pipewire_module_protocol_pulse = shared_library('pipewire-module-protocol-pulse'
   install : true,
   install_dir : modules_install_dir,
   install_rpath: modules_install_dir,
-  dependencies : pipewire_module_protocol_deps,
+  dependencies : pipewire_module_protocol_pulse_deps,
 )
 
 pipewire_module_client_node = shared_library('pipewire-module-client-node',

src/modules/module-protocol-pulse/dbus-name.c

@@ -0,0 +1,64 @@
+/* pulseaudio server
+ *
+ * Copyright © 2019 Wim Taymans
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <dbus/dbus.h>
+#include <spa/support/dbus.h>
+
+static int dbus_request_name(struct pw_context *context, const char *name)
+{
+	struct spa_dbus *dbus;
+	struct spa_dbus_connection *conn;
+	const struct spa_support *support;
+	uint32_t n_support;
+	DBusConnection *bus;
+	DBusError error;
+
+	support = pw_context_get_support(context, &n_support);
+
+	dbus = spa_support_find(support, n_support, SPA_TYPE_INTERFACE_DBus);
+	if (dbus == NULL)
+		return -ENOTSUP;
+
+        conn = spa_dbus_get_connection(dbus, SPA_DBUS_TYPE_SESSION);
+        if (conn == NULL)
+		return -errno;
+
+	bus = spa_dbus_connection_get(conn);
+
+	dbus_error_init(&error);
+
+	if (dbus_bus_request_name(bus, name,
+			DBUS_NAME_FLAG_DO_NOT_QUEUE,
+			&error) == DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER)
+		return 0;
+
+	if (dbus_error_is_set(&error))
+		pw_log_error("Failed to acquire %s: %s: %s", name, error.name, error.message);
+	else
+		pw_log_error("D-Bus name %s already taken.", name);
+
+	dbus_error_free(&error);
+
+	return -EEXIST;
+}

src/modules/module-protocol-pulse/pulse-server.c

@@ -71,6 +71,7 @@
 #include "volume.c"
 #include "message.c"
 #include "manager.h"
+#include "dbus-name.c"
 
 #define NAME	"pulse-server"
 
@@ -5270,6 +5271,8 @@ struct pw_protocol_pulse *pw_protocol_pulse_new(struct pw_context *context,
 	pw_free_strv(addr);
 	free(free_str);
 
+	dbus_request_name(context, "org.pulseaudio.Server");
+
 	return (struct pw_protocol_pulse*)impl;
 
 error_free: