pulse: add a small pulseaudio daemon

Add a small application that loads the pulse server and makes it
listen on the pulseaudio socket.
Add some systemd activation files to start the service.

src/daemon/pipewire-pulse.c

@@ -0,0 +1,129 @@
+/* PipeWire
+ *
+ * Copyright © 2020 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 <signal.h>
+#include <getopt.h>
+
+#include <spa/utils/result.h>
+
+#include <pipewire/impl.h>
+
+#include "config.h"
+
+static const char *address;
+
+static void do_quit(void *data, int signal_number)
+{
+	struct pw_main_loop *loop = data;
+	pw_main_loop_quit(loop);
+}
+
+static void show_help(const char *name)
+{
+	fprintf(stdout, "%s [options]\n"
+		"  -h, --help                            Show this help\n"
+		"      --version                         Show version\n"
+		"  -a  --address                         comma separated list of addresses (Default %s)\n",
+		name,
+		address);
+}
+
+int main(int argc, char *argv[])
+{
+	struct pw_context *context;
+	struct pw_main_loop *loop;
+	struct pw_properties *properties;
+	char *args;
+	static const struct option long_options[] = {
+		{ "help",	no_argument,		NULL, 'h' },
+		{ "version",	no_argument,		NULL, 'V' },
+		{ "address",	required_argument,	NULL, 'a' },
+		{ NULL, 0, NULL, 0}
+	};
+	int c;
+
+	pw_init(&argc, &argv);
+
+	address = "unix:native";
+
+	while ((c = getopt_long(argc, argv, "hVa:", long_options, NULL)) != -1) {
+		switch (c) {
+		case 'h':
+			show_help(argv[0]);
+			return 0;
+		case 'V':
+			fprintf(stdout, "%s\n"
+				"Compiled with libpipewire %s\n"
+				"Linked with libpipewire %s\n",
+				argv[0],
+				pw_get_headers_version(),
+				pw_get_library_version());
+			return 0;
+		case 'a':
+			address = optarg;
+			fprintf(stdout, "set address %s\n", address);
+			break;
+		default:
+			return -1;
+		}
+	}
+
+	properties = pw_properties_new(
+				PW_KEY_CONTEXT_PROFILE_MODULES, "default,rtkit",
+				NULL);
+
+	loop = pw_main_loop_new(&properties->dict);
+	if (loop == NULL) {
+		pw_log_error("failed to create main-loop: %m");
+		return -1;
+	}
+
+	pw_loop_add_signal(pw_main_loop_get_loop(loop), SIGINT, do_quit, loop);
+	pw_loop_add_signal(pw_main_loop_get_loop(loop), SIGTERM, do_quit, loop);
+
+	context = pw_context_new(pw_main_loop_get_loop(loop), properties, 0);
+	if (context == NULL) {
+		pw_log_error("failed to create context: %m");
+		return -1;
+	}
+
+	args = spa_aprintf("server.address=%s", address);
+	if (pw_context_load_module(context,
+				"libpipewire-module-protocol-pulse",
+				args, NULL) == NULL) {
+		pw_log_error("failed to create pulse module: %m");
+		return -1;
+	}
+
+	pw_log_info("start main loop");
+	pw_main_loop_run(loop);
+	pw_log_info("leave main loop");
+
+	free(args);
+	pw_context_destroy(context);
+	pw_main_loop_destroy(loop);
+	pw_deinit();
+
+	return 0;
+}