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- Committer: Osmo Antero
- Date: 2012-04-18 19:22:01 UTC
- Revision ID: osmoma@gmail.com-20120418192201-ejjs6ikv7o4aznbi
New media-player interface that's based on the MediaPlayer2 standard. See src/dbus-mpris2.c.
- files added:
- po/Makefile
- files removed:
- src/dbus-banshee.c
- files modified:
- Makefile.am
added
removed
src/dbus-service.c
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#include "log.h"
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#include "support.h"
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#include "about.h"
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#include "rec-manager.h"
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#include <gst/gst.h>
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// This module creates a DBus-server for this program.
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// Other programs can control the recorder by calling methods via this DBus interface.
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//
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// Audio-recorder itself can send messages to the running instance of this program.
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// See audio-recorder --help for more information.
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//
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// Exported DBus methods are:
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// get_state(), returns current recording state: "not running" | "on" | off" | "paused".
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//
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// set_state(state), set new state. The state can be one of: "start"|"stop"|"pause"|"hide"|"show"|"quit".
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// returns "OK" if success. NULL if error.
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//
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// Ref: http://developer.gnome.org/gio/2.28/GDBusServer.html
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//
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// Notice: This module has nothing to do with dbus-player.[ch], dbus-mpris.[ch] and other dbus-<add your media player her>.[ch] modules.
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//
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#define R_DBUS_SERVER_ADDRESS "unix:abstract=audiorecorder"
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#define R_DBUS_OBJECT_PATH "/org/gnome/API/AudioRecorder"
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#define R_DBUS_INTERFACE_NAME "org.gnome.API.AudioRecorderInterface"
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static GDBusServer *g_dbus_server = NULL;
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static GDBusNodeInfo *g_introspection_data = NULL;
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// Signatures for the methods we are exporting.
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// DBus clients can get information or control the recorder by calling these functions.
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static const gchar g_introspection_xml[] =
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"<node>"
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" <interface name='org.gnome.API.AudioRecorderInterface'>"
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" <method name='get_state'>"
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" <arg type='s' name='response' direction='out'/>" // Returns current recording state: "not running"|"on"|off"|"paused"
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" </method>"
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" <method name='set_state'>"
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" <arg type='s' name='state' direction='in'/>" // Set new state. Input argument:"start"|"stop"|"pause"|"hide"|"show"|"quit".
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" <arg type='s' name='response' direction='out'/>" // Returns "OK" or NULL if error.
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" </method>"
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" </interface>"
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"</node>";
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static gboolean dbus_service_start();
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static void dbus_service_set_state(gchar *new_state);
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// -----------------------------------------------------------------------------------
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void dbus_service_module_init() {
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LOG_DEBUG("Init dbus_service.c\n");
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g_dbus_server = NULL;
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// Start service
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dbus_service_start();
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}
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void dbus_service_module_exit() {
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LOG_DEBUG("Clean up dbus_service.c.\n");
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if (g_introspection_data) {
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g_dbus_node_info_unref(g_introspection_data);
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}
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g_introspection_data = NULL;
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if (g_dbus_server) {
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g_object_unref(g_dbus_server);
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}
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g_dbus_server = NULL;
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}
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static void handle_method_call(GDBusConnection *connection,
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const gchar *sender,
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const gchar *object_path,
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const gchar *interface_name,
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const gchar *method_name,
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GVariant *parameters,
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GDBusMethodInvocation *invocation,
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gpointer user_data) {
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// DBus method call: get_state.
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// Returns "not running" | "on" | "off" | "paused"
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if (g_strcmp0(method_name, "get_state") == 0) {
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// Get recording state
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gint state = -1;
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gint pending = -1;
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rec_manager_get_state(&state, &pending);
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const gchar *state_str = NULL;
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switch (state) {
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case GST_STATE_PAUSED:
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state_str = "paused";
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break;
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case GST_STATE_PLAYING:
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state_str = "on";
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break;
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default:
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state_str = "off";
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}
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g_dbus_method_invocation_return_value(invocation, g_variant_new ("(s)", state_str));
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LOG_DEBUG("Audio recorder (DBus-server) executed method get_state().\n");
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}
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// DBus method call: set_state(new_state).
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// new_state can be: "start" | "stop" | "pause" | "show" | "hide" | "quit".
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// Returns "OK" | NULL
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else if (g_strcmp0 (method_name, "set_state") == 0) {
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gchar *response = g_strdup("OK");
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gchar *new_state = NULL;
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g_variant_get(parameters, "(&s)", &new_state);
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g_dbus_method_invocation_return_value(invocation, g_variant_new ("(s)", response));
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g_free(response);
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LOG_DEBUG("Audio recorder (Dbus-server) executed method set_state(%s).\n", new_state);
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// Set recorder to new_state
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dbus_service_set_state(new_state);
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}
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}
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static void dbus_service_set_state(gchar *new_state) {
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// Set recorder to new_state
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// $ audio-recorder --command start
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if (!g_strcmp0(new_state, "start")) {
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rec_manager_start_recording();
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}
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// $ audio-recorder --command stop
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else if (!g_strcmp0(new_state, "stop")) {
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rec_manager_stop_recording();
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}
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// $ audio-recorder --command pause
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else if (!g_strcmp0(new_state, "pause")) {
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rec_manager_pause_recording();
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}
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// $ audio-recorder --command show
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else if (!g_strcmp0(new_state, "show")) {
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rec_manager_show_window(TRUE);
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}
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// $ audio-recorder --command hide
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else if (!g_strcmp0(new_state, "hide")) {
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rec_manager_show_window(FALSE);
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}
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// $ audio-recorder --command quit
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else if (!g_strcmp0(new_state, "quit")) {
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rec_manager_quit_application();
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}
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}
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static const GDBusInterfaceVTable interface_vtable = {
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handle_method_call,
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NULL,
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NULL,
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};
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// ---------------------------------------------------------------------------------
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static gboolean on_new_connection(GDBusServer *server, GDBusConnection *connection, gpointer user_data) {
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/*
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GCredentials *credentials = NULL;
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credentials = g_dbus_connection_get_peer_credentials(connection);
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gchar *s = NULL;
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if (credentials == NULL)
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s = g_strdup ("(no credentials received)");
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else
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s = g_credentials_to_string(credentials);
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LOG_DEBUG("Client connected.\n"
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"Peer credentials: %s\n"
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"Negotiated capabilities: unix-fd-passing=%d\n",
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s,
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g_dbus_connection_get_capabilities(connection) & G_DBUS_CAPABILITY_FLAGS_UNIX_FD_PASSING);
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*/
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g_object_ref(connection);
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gint registration_id = g_dbus_connection_register_object(connection,
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R_DBUS_OBJECT_PATH,
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g_introspection_data->interfaces[0],
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&interface_vtable,
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NULL, /* user_data */
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NULL, /* user_data_free_func */
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NULL); /* GError */
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return (registration_id > 0);
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}
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static gboolean dbus_service_start() {
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// Start DBus-server for this application.
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// This will receive method calls from external programs.
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// Build introspection data from XML
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g_introspection_data = g_dbus_node_info_new_for_xml(g_introspection_xml, NULL);
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// Server flags
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GDBusServerFlags server_flags = G_DBUS_SERVER_FLAGS_NONE;
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server_flags |= G_DBUS_SERVER_FLAGS_AUTHENTICATION_ALLOW_ANONYMOUS;
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gchar *guid = g_dbus_generate_guid();
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// Create a new D-Bus server that listens on R_DBUS_SERVER_ADDRESS
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GError *error = NULL;
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g_dbus_server = g_dbus_server_new_sync(R_DBUS_SERVER_ADDRESS,
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server_flags,
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guid,
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NULL, /* GDBusAuthObserver */
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NULL, /* GCancellable */
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&error);
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g_dbus_server_start(g_dbus_server);
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g_free(guid);
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if (g_dbus_server == NULL) {
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LOG_ERROR("Cannot create server address %s for DBus. %s\n", R_DBUS_SERVER_ADDRESS, error->message);
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g_error_free(error);
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return FALSE;
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}
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LOG_DEBUG("This Audio Recorder is listening on DBus at: %s\n", g_dbus_server_get_client_address(g_dbus_server));
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// Set up callback method (for client calls)
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g_signal_connect(g_dbus_server, "new-connection", G_CALLBACK (on_new_connection), NULL);
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return (g_dbus_server != NULL);
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}
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gchar *dbus_service_client_request(gchar *method_name, gchar *arg) {
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// Execute method call on DBus-server.
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// Audio-recorder itself can call methods on the server.
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// DBus-server will most likely return a value. Pass it to the calling function.
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GError *error = NULL;
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GDBusConnection *connection = g_dbus_connection_new_for_address_sync(R_DBUS_SERVER_ADDRESS,
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G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_CLIENT,
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NULL, // GDBusAuthObserver
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NULL, // GCancellable
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&error);
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if (!connection) {
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LOG_DEBUG("Cannot connect to DBus address %s. %s\n", R_DBUS_SERVER_ADDRESS, error->message);
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g_error_free(error);
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return NULL;
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}
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// Optional argument
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GVariant *argument = NULL;
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if (arg) {
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argument = g_variant_new("(s)", arg);
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}
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GVariant *value = NULL;
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value = g_dbus_connection_call_sync(connection,
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NULL, // bus_name
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R_DBUS_OBJECT_PATH,
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R_DBUS_INTERFACE_NAME,
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method_name, // method_name
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argument, // input parm
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G_VARIANT_TYPE ("(s)"), // return value (one string)
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G_DBUS_CALL_FLAGS_NONE,
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-1,
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NULL,
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&error);
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if (!value) {
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LOG_ERROR("Error invoking %s(%s). %s\n", method_name, arg, error->message);
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g_error_free(error);
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return NULL;
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}
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gchar *server_response = NULL;
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g_variant_get(value, "(&s)", &server_response);
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// Take copy of the value
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gchar *ret = g_strdup(server_response);
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if (value) {
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g_variant_unref(value);
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}
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if (connection) {
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g_object_unref(connection);
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}
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// Return ret
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return ret;
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}
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