common/mm_sound_dbus.c

   1
   2 #include <gio/gio.h>
   3 #include <stdlib.h>
   4
   5 #include <mm_error.h>
   6 #include <mm_debug.h>
   7
   8 #include "../include/mm_sound_dbus.h"
   9 #include "../include/mm_sound_intf.h"
  10
  11 #define INTERFACE_DBUS                  "org.freedesktop.DBus.Properties"
  12 #define SIGNAL_PROP_CHANGED             "PropertiesChanged"
  13 #define METHOD_GET                      "Get"
  14 #define METHOD_SET                      "Set"
  15
  16 struct callback_data {
  17         mm_sound_dbus_callback user_cb;
  18         void *user_data;
  19         mm_sound_dbus_userdata_free free_func;
  20 };
  21
  22 struct dbus_path {
  23         char *bus_name;
  24         char *object;
  25         char *interface;
  26 };
  27
  28 const struct dbus_path g_paths[AUDIO_PROVIDER_MAX] = {
  29         [AUDIO_PROVIDER_SOUND_SERVER] = {
  30                 .bus_name = "org.tizen.SoundServer",
  31                 .object = "/org/tizen/SoundServer1",
  32                 .interface ="org.tizen.SoundServer1"
  33         },
  34         [AUDIO_PROVIDER_FOCUS_SERVER] = {
  35                 .bus_name = "org.tizen.FocusServer",
  36                 .object = "/org/tizen/FocusServer1",
  37                 .interface = "org.tizen.FocusServer1"
  38         },
  39         [AUDIO_PROVIDER_DEVICE_MANAGER] = {
  40                 .bus_name = "org.pulseaudio.Server",
  41                 .object = "/org/pulseaudio/DeviceManager",
  42                 .interface = "org.pulseaudio.DeviceManager"
  43         },
  44         [AUDIO_PROVIDER_STREAM_MANAGER] = {
  45                 .bus_name = "org.pulseaudio.Server",
  46                 .object = "/org/pulseaudio/StreamManager",
  47                 .interface = "org.pulseaudio.StreamManager"
  48         },
  49         [AUDIO_PROVIDER_AUDIO_CLIENT] = {
  50                 .bus_name = "org.tizen.AudioClient",
  51                 .object = "/org/tizen/AudioClient1",
  52                 .interface = "org.tizen.AudioClient1"
  53         }
  54 };
  55
  56 const mm_sound_dbus_method_info_t g_methods[AUDIO_METHOD_MAX] = {
  57         [AUDIO_METHOD_TEST] = {
  58                 .name = "MethodTest1",
  59         },
  60         [AUDIO_METHOD_PLAY_FILE_START] = {
  61                 .name = "PlayFileStart",
  62         },
  63         [AUDIO_METHOD_PLAY_FILE_START_WITH_STREAM_INFO] = {
  64                 .name = "PlayFileStartWithStreamInfo",
  65         },
  66         [AUDIO_METHOD_PLAY_FILE_STOP] = {
  67                 .name = "PlayFileStop",
  68         },
  69         [AUDIO_METHOD_PLAY_DTMF] = {
  70                 .name = "PlayDTMF",
  71         },
  72         [AUDIO_METHOD_PLAY_DTMF_WITH_STREAM_INFO] = {
  73                 .name = "PlayDTMFWithStreamInfo",
  74         },
  75         [AUDIO_METHOD_CLEAR_FOCUS] = {
  76                 .name = "ClearFocus",
  77         },
  78         [AUDIO_METHOD_SET_VOLUME_LEVEL] = {
  79                 .name = "SetVolumeLevel",
  80         },
  81         [AUDIO_METHOD_GET_CONNECTED_DEVICE_LIST] = {
  82                 .name = "GetConnectedDeviceList",
  83         },
  84         [AUDIO_METHOD_IS_STREAM_ON_DEVICE] = {
  85                 .name = "IsStreamOnDevice",
  86         },
  87         [AUDIO_METHOD_GET_UNIQUE_ID] = {
  88                 .name = "GetUniqueId",
  89         },
  90         [AUDIO_METHOD_REGISTER_FOCUS] = {
  91                 .name = "RegisterFocus",
  92         },
  93         [AUDIO_METHOD_UNREGISTER_FOCUS] = {
  94                 .name = "UnregisterFocus",
  95         },
  96         [AUDIO_METHOD_SET_FOCUS_REACQUISITION] = {
  97                 .name = "SetFocusReacquisition",
  98         },
  99         [AUDIO_METHOD_GET_ACQUIRED_FOCUS_STREAM_TYPE] = {
 100                 .name = "GetAcquiredFocusStreamType",
 101         },
 102         [AUDIO_METHOD_ACQUIRE_FOCUS] = {
 103                 .name = "AcquireFocus",
 104         },
 105         [AUDIO_METHOD_RELEASE_FOCUS] = {
 106                 .name = "ReleaseFocus",
 107         },
 108         [AUDIO_METHOD_UPDATE_STREAM_FOCUS_STATUS] = {
 109                 .name = "UpdateFocusStatusByFocusId",
 110         },
 111         [AUDIO_METHOD_WATCH_FOCUS] = {
 112                 .name = "WatchFocus",
 113         },
 114         [AUDIO_METHOD_UNWATCH_FOCUS] = {
 115                 .name = "UnwatchFocus",
 116         },
 117         [AUDIO_METHOD_SET_FILTER] = {
 118                 .name = "SetFilter",
 119         },
 120         [AUDIO_METHOD_UNSET_FILTER] = {
 121                 .name = "UnsetFilter",
 122         },
 123         [AUDIO_METHOD_CONTROL_FILTER] = {
 124                 .name = "ControlFilter",
 125         },
 126 };
 127
 128 const mm_sound_dbus_signal_info_t g_events[AUDIO_EVENT_MAX] = {
 129         [AUDIO_EVENT_TEST] = {
 130                 .name = "SignalTest1",
 131         },
 132         [AUDIO_EVENT_PLAY_FILE_END] = {
 133                 .name = "PlayFileEnd",
 134         },
 135         [AUDIO_EVENT_VOLUME_CHANGED] = {
 136                 .name = "VolumeChanged",
 137         },
 138         [AUDIO_EVENT_DEVICE_CONNECTED] = {
 139                 .name = "DeviceConnected",
 140         },
 141         [AUDIO_EVENT_DEVICE_INFO_CHANGED] = {
 142                 .name = "DeviceInfoChanged",
 143         },
 144         [AUDIO_EVENT_DEVICE_STATE_CHANGED] = {
 145                 .name = "DeviceStateChanged",
 146         },
 147         [AUDIO_EVENT_FOCUS_CHANGED] = {
 148                 .name = "FocusChanged",
 149         },
 150         [AUDIO_EVENT_FOCUS_WATCH] = {
 151                 .name = "FocusWatch",
 152         },
 153         [AUDIO_EVENT_EMERGENT_EXIT] = {
 154                 .name = "EmergentExit",
 155         },
 156         [AUDIO_EVENT_CLIENT_SUBSCRIBED] = {
 157                 .name = "ClientSubscribed",
 158         },
 159         [AUDIO_EVENT_CLIENT_HANDLED] = {
 160                 .name = "ClientSignalHandled",
 161         }
 162 };
 163
 164 /* Only For error types which is currently being used in server-side */
 165 static const GDBusErrorEntry mm_sound_error_entries[] =
 166 {
 167         {MM_ERROR_OUT_OF_MEMORY, "org.tizen.multimedia.OutOfMemory"},
 168         {MM_ERROR_OUT_OF_STORAGE, "org.tizen.multimedia.OutOfStorage"},
 169         {MM_ERROR_INVALID_ARGUMENT, "org.tizen.multimedia.InvalidArgument"},
 170         {MM_ERROR_POLICY_INTERNAL, "org.tizen.multimedia.PolicyInternal"},
 171         {MM_ERROR_NOT_SUPPORT_API, "org.tizen.multimedia.NotSupportAPI"},
 172         {MM_ERROR_POLICY_BLOCKED, "org.tizen.multimedia.PolicyBlocked"},
 173         {MM_ERROR_END_OF_FILE, "org.tizen.multimedia.EndOfFile"},
 174         {MM_ERROR_COMMON_OUT_OF_RANGE, "org.tizen.multimedia.common.OutOfRange"},
 175         {MM_ERROR_COMMON_UNKNOWN, "org.tizen.multimedia.common.Unknown"},
 176         {MM_ERROR_COMMON_NO_FREE_SPACE, "org.tizen.multimedia.common.NoFreeSpace"},
 177         {MM_ERROR_SOUND_INTERNAL, "org.tizen.multimedia.audio.Internal"},
 178         {MM_ERROR_SOUND_INVALID_STATE, "org.tizen.multimedia.audio.InvalidState"},
 179         {MM_ERROR_SOUND_NO_FREE_SPACE, "org.tizen.multimedia.audio.NoFreeSpace"},
 180         {MM_ERROR_SOUND_UNSUPPORTED_MEDIA_TYPE, "org.tizen.multimedia.audio.UnsupportedMediaType"},
 181         {MM_ERROR_SOUND_INVALID_POINTER, "org.tizen.multimedia.audio.InvalidPointer"},
 182         {MM_ERROR_SOUND_INVALID_FILE, "org.tizen.multimedia.audio.InvalidFile"},
 183         {MM_ERROR_SOUND_FILE_NOT_FOUND, "org.tizen.multimedia.audio.FileNotFound"},
 184         {MM_ERROR_SOUND_NO_DATA, "org.tizen.multimedia.audio.NoData"},
 185         {MM_ERROR_SOUND_INVALID_PATH, "org.tizen.multimedia.audio.InvalidPath"},
 186 };
 187
 188
 189 /******************************************************************************************
 190                 Wrapper Functions of GDbus
 191 ******************************************************************************************/
 192
 193 static int _parse_error_msg(char *full_err_msg, char **err_name, char **err_msg)
 194 {
 195         char *save_p, *domain, *_err_name, *_err_msg;
 196
 197         if (!(domain = strtok_r(full_err_msg, ":", &save_p))) {
 198                 debug_error("get domain failed");
 199                 return -1;
 200         }
 201         if (!(_err_name = strtok_r(NULL, ":", &save_p))) {
 202                 debug_error("get err name failed");
 203                 return -1;
 204         }
 205         if (!(_err_msg = strtok_r(NULL, ":", &save_p))) {
 206                 debug_error("get err msg failed");
 207                 return -1;
 208         }
 209
 210         *err_name = _err_name;
 211         *err_msg = _err_msg;
 212
 213         return 0;
 214 }
 215
 216 static int _convert_error_name(const char *err_name)
 217 {
 218         int i = 0;
 219
 220         for (i = 0; i < G_N_ELEMENTS(mm_sound_error_entries); i++) {
 221                 if (!strcmp(mm_sound_error_entries[i].dbus_error_name, err_name)) {
 222                         return mm_sound_error_entries[i].error_code;
 223                 }
 224         }
 225
 226         return MM_ERROR_COMMON_UNKNOWN;
 227 }
 228
 229 static int _dbus_method_call(GDBusConnection* conn, const char* bus_name, const char* object, const char* intf,
 230                                                         const char* method, GVariant* args, GVariant** result)
 231 {
 232         int ret = MM_ERROR_NONE;
 233         GError *err = NULL;
 234         GVariant* dbus_reply = NULL;
 235
 236         if (!conn || !object || !intf || !method) {
 237                 debug_error("Invalid Argument");
 238                 if (!conn)
 239                         debug_error("conn null");
 240                 if (!object)
 241                         debug_error("object null");
 242                 if (!intf)
 243                         debug_error("intf null");
 244                 if (!method)
 245                         debug_error("method null");
 246                 return MM_ERROR_INVALID_ARGUMENT;
 247         }
 248
 249         debug_log("Dbus call with obj'%s' intf'%s' method'%s'", object, intf, method);
 250
 251         dbus_reply = g_dbus_connection_call_sync(conn, bus_name, object , intf,
 252                              method, args ,
 253                              NULL, G_DBUS_CALL_FLAGS_NONE, -1, NULL, &err );
 254
 255         if (!dbus_reply) {
 256                 char *err_name = NULL, *err_msg = NULL;
 257                 debug_error("Method Call '%s.%s' Failed, %s", intf, method, err->message);
 258
 259                 if (_parse_error_msg(err->message,  &err_name, &err_msg) < 0) {
 260                         debug_error("failed to parse error message");
 261                         g_error_free(err);
 262                         return MM_ERROR_SOUND_INTERNAL;
 263                 }
 264                 ret = _convert_error_name(err_name);
 265                 g_error_free(err);
 266         } else {
 267                 debug_log("Method Call '%s.%s' Success", intf, method);
 268         }
 269
 270         *result = dbus_reply;
 271
 272         return ret;
 273 }
 274
 275 #if 0
 276 static int _dbus_set_property(GDBusConnection* conn, const char* bus_name, const char* object, const char* intf,
 277                                                         const char* prop, GVariant* args, GVariant** result)
 278 {
 279         int ret = MM_ERROR_NONE;
 280
 281         if (!conn || !object || !intf || !prop) {
 282                 debug_error("Invalid Argument");
 283                 return MM_ERROR_INVALID_ARGUMENT;
 284         }
 285
 286         debug_log("Dbus set property with obj'%s' intf'%s' prop'%s'", object, intf, prop);
 287
 288         if ((ret = _dbus_method_call(conn, bus_name, object, INTERFACE_DBUS, METHOD_SET,
 289                                                                 g_variant_new("(ssv)", intf, prop, args), result)) != MM_ERROR_NONE) {
 290                 debug_error("Dbus call for set property failed");
 291         }
 292
 293         return ret;
 294 }
 295
 296 static int _dbus_get_property(GDBusConnection *conn, const char* bus_name, const char* object_name,
 297                                                         const char* intf_name, const char* prop, GVariant** result)
 298 {
 299         int ret = MM_ERROR_NONE;
 300
 301         if (!conn || !object_name || !intf_name || !prop) {
 302                 debug_error("Invalid Argument");
 303                 return MM_ERROR_INVALID_ARGUMENT;
 304         }
 305
 306         debug_log("Dbus get property with obj'%s' intf'%s' prop'%s'", object_name, intf_name, prop);
 307
 308         if ((ret = _dbus_method_call(conn,
 309                                        bus_name, object_name, INTERFACE_DBUS, METHOD_GET,
 310                                        g_variant_new("(ss)", intf_name, prop), result)) != MM_ERROR_NONE) {
 311                 debug_error("Dbus call for get property failed");
 312         }
 313
 314         return ret;
 315 }
 316 #endif
 317
 318 static int _dbus_subscribe_signal(GDBusConnection *conn, const char* object_name, const char* intf_name,
 319                                         const char* signal_name, GDBusSignalCallback signal_cb, guint *subscribe_id, void* userdata, GDestroyNotify freefunc)
 320 {
 321         guint subs_id = 0;
 322
 323         if (!conn || !object_name || !intf_name || !signal_name || !signal_cb) {
 324                 debug_error("Invalid Argument");
 325                 return MM_ERROR_INVALID_ARGUMENT;
 326         }
 327
 328         debug_log("Dbus subscirbe signal with Obj'%s' Intf'%s' sig'%s'", object_name, intf_name, signal_name);
 329
 330         subs_id = g_dbus_connection_signal_subscribe(conn, NULL, intf_name, signal_name, object_name,
 331                                                                                                 NULL, G_DBUS_SIGNAL_FLAGS_NONE , signal_cb, userdata, freefunc);
 332
 333         if (!subs_id) {
 334                 debug_error ("g_dbus_connection_signal_subscribe() failed ");
 335                 return MM_ERROR_SOUND_INTERNAL;
 336         }
 337         if (subscribe_id)
 338                 *subscribe_id = subs_id;
 339
 340         return MM_ERROR_NONE;
 341 }
 342
 343 static void _dbus_unsubscribe_signal(GDBusConnection *conn, guint subs_id)
 344 {
 345         if (!conn || !subs_id) {
 346                 debug_error("Invalid Argument");
 347                 return;
 348         }
 349
 350         g_dbus_connection_signal_unsubscribe(conn, subs_id);
 351 }
 352
 353 static GDBusConnection* _dbus_get_connection(GBusType bustype)
 354 {
 355         static GDBusConnection *conn_system = NULL;
 356         static GDBusConnection *conn_session = NULL;
 357         GError *err = NULL;
 358
 359         if (bustype == G_BUS_TYPE_SYSTEM) {
 360                 if (conn_system) {
 361                         debug_log("Already connected to system bus");
 362                 } else {
 363                         debug_log("Get new connection on system bus");
 364                         if (!(conn_system = g_bus_get_sync(bustype, NULL, &err))) {
 365                                 debug_error ("g_dbus_get_sync() error (%s)", err->message);
 366                                 g_error_free(err);
 367                         }
 368                 }
 369                 return conn_system;
 370         } else if (bustype == G_BUS_TYPE_SESSION) {
 371                 if (conn_session) {
 372                         debug_log("Already connected to session bus");
 373                 } else {
 374                         debug_log("Get new connection on session bus");
 375                         if (!(conn_session = g_bus_get_sync(bustype, NULL, &err))) {
 376                                 debug_error ("g_dbus_get_sync() error (%s)", err->message);
 377                                 g_error_free(err);
 378                         }
 379                 }
 380                 return conn_session;
 381         } else {
 382                 debug_error("Invalid bus type");
 383                 return NULL;
 384         }
 385
 386 }
 387
 388 #if 0
 389 static void _dbus_disconnect(GDBusConnection* conn)
 390 {
 391         debug_fenter ();
 392         g_object_unref(conn);
 393         debug_fleave ();
 394 }
 395 #endif
 396
 397 /******************************************************************************************
 398                 Simple Functions For Communicate with Sound-Server
 399 ******************************************************************************************/
 400
 401 EXPORT_API
 402 int mm_sound_dbus_method_call_to(audio_provider_t provider, audio_method_t method_type, GVariant *args, GVariant **result)
 403 {
 404         int ret = MM_ERROR_NONE;
 405         GDBusConnection *conn = NULL;
 406
 407         if (method_type < 0 || method_type >= AUDIO_METHOD_MAX) {
 408                 debug_error("Invalid method type : %d", method_type);
 409                 return MM_ERROR_INVALID_ARGUMENT;
 410         }
 411         if (provider < 0 || provider >= AUDIO_PROVIDER_MAX) {
 412                 debug_error("Invalid provider : %d", provider);
 413                 return MM_ERROR_INVALID_ARGUMENT;
 414         }
 415
 416         if (!(conn = _dbus_get_connection(G_BUS_TYPE_SYSTEM))) {
 417                 debug_error("Get Dbus Connection Error");
 418                 return MM_ERROR_SOUND_INTERNAL;
 419         }
 420
 421         if ((ret = _dbus_method_call(conn, g_paths[provider].bus_name,
 422                                       g_paths[provider].object,
 423                                       g_paths[provider].interface,
 424                                       g_methods[method_type].name,
 425                                       args, result)) != MM_ERROR_NONE) {
 426                 debug_error("Dbus Call on Client Error");
 427         }
 428
 429         return ret;
 430 }
 431
 432 /* This callback only transform signal-callback to dbus non-related form (mm_sound_dbus_callback) */
 433 static void _dbus_signal_callback(GDBusConnection  *connection,
 434                                      const gchar      *sender_name,
 435                                      const gchar      *object_path,
 436                                      const gchar      *interface_name,
 437                                      const gchar      *signal_name,
 438                                      GVariant         *params,
 439                                      gpointer          userdata)
 440 {
 441         struct callback_data *cb_data = (struct callback_data*) userdata;
 442
 443         debug_log("Signal(%s.%s) Received , Let's call Wrapper-Callback", interface_name, signal_name);
 444
 445         if (!strcmp(signal_name, g_events[AUDIO_EVENT_VOLUME_CHANGED].name)) {
 446                 (cb_data->user_cb)(AUDIO_EVENT_VOLUME_CHANGED, params, cb_data->user_data);
 447         } else if (!strcmp(signal_name, g_events[AUDIO_EVENT_DEVICE_CONNECTED].name)) {
 448                 (cb_data->user_cb)(AUDIO_EVENT_DEVICE_CONNECTED, params, cb_data->user_data);
 449         } else if (!strcmp(signal_name, g_events[AUDIO_EVENT_DEVICE_INFO_CHANGED].name)) {
 450                 (cb_data->user_cb)(AUDIO_EVENT_DEVICE_INFO_CHANGED, params, cb_data->user_data);
 451         } else if (!strcmp(signal_name, g_events[AUDIO_EVENT_DEVICE_STATE_CHANGED].name)) {
 452                 (cb_data->user_cb)(AUDIO_EVENT_DEVICE_STATE_CHANGED, params, cb_data->user_data);
 453         } else if (!strcmp(signal_name, g_events[AUDIO_EVENT_FOCUS_CHANGED].name)) {
 454                 (cb_data->user_cb)(AUDIO_EVENT_FOCUS_CHANGED, params, cb_data->user_data);
 455         } else if (!strcmp(signal_name, g_events[AUDIO_EVENT_FOCUS_WATCH].name)) {
 456                 (cb_data->user_cb)(AUDIO_EVENT_FOCUS_WATCH, params, cb_data->user_data);
 457         } else if (!strcmp(signal_name, g_events[AUDIO_EVENT_PLAY_FILE_END].name)) {
 458                 (cb_data->user_cb)(AUDIO_EVENT_PLAY_FILE_END, params, cb_data->user_data);
 459         } else if (!strcmp(signal_name, g_events[AUDIO_EVENT_EMERGENT_EXIT].name)) {
 460                 (cb_data->user_cb)(AUDIO_EVENT_EMERGENT_EXIT, params, cb_data->user_data);
 461         }
 462 }
 463
 464 static void callback_data_free_func(gpointer data)
 465 {
 466         struct callback_data *cb_data = (struct callback_data *) data;
 467
 468         if (cb_data->free_func)
 469                 cb_data->free_func(cb_data->user_data);
 470         g_free(cb_data);
 471 }
 472
 473 EXPORT_API
 474 int mm_sound_dbus_signal_subscribe_to(audio_provider_t provider, audio_event_t event, mm_sound_dbus_callback callback, void *userdata, mm_sound_dbus_userdata_free freefunc, unsigned *subs_id)
 475 {
 476         GDBusConnection *conn = NULL;
 477         guint _subs_id = 0;
 478         struct callback_data *cb_data = NULL;
 479
 480         if (!callback) {
 481                 debug_error("Callback is Null");
 482                 return MM_ERROR_INVALID_ARGUMENT;
 483         }
 484
 485         if (event < 0 || event >= AUDIO_EVENT_MAX) {
 486                 debug_error("Wrong event Type : %d", event);
 487                 return MM_ERROR_INVALID_ARGUMENT;
 488         }
 489
 490         if (provider < 0 || provider >= AUDIO_PROVIDER_MAX) {
 491                 debug_error("Invalid provider : %d", provider);
 492                 return MM_ERROR_INVALID_ARGUMENT;
 493         }
 494
 495         if (!(conn = _dbus_get_connection(G_BUS_TYPE_SYSTEM))) {
 496                 debug_error("Get Dbus Connection Error");
 497                 return MM_ERROR_SOUND_INTERNAL;
 498         }
 499
 500         if (!(cb_data = (struct callback_data*) g_malloc0(sizeof(struct callback_data)))) {
 501                 debug_error("Allocate for callback data failed");
 502                 return MM_ERROR_SOUND_INTERNAL;
 503         }
 504
 505         cb_data->user_cb = callback;
 506         cb_data->user_data = userdata;
 507         cb_data->free_func = freefunc;
 508
 509         if (_dbus_subscribe_signal(conn, g_paths[provider].object, g_paths[provider].interface, g_events[event].name,
 510                                                         _dbus_signal_callback, &_subs_id, cb_data, callback_data_free_func) != MM_ERROR_NONE) {
 511                 debug_error("Dbus Subscribe on Client Error");
 512                 goto fail;
 513         }
 514         if (subs_id)
 515                 *subs_id = (unsigned int)_subs_id;
 516
 517         return MM_ERROR_NONE;
 518
 519 fail:
 520         free(cb_data);
 521         return MM_ERROR_SOUND_INTERNAL;
 522 }
 523
 524 EXPORT_API
 525 int mm_sound_dbus_signal_unsubscribe(unsigned int subs_id)
 526 {
 527         GDBusConnection *conn = NULL;
 528
 529         if (!(conn = _dbus_get_connection(G_BUS_TYPE_SYSTEM))) {
 530                 debug_error("Get Dbus Connection Error");
 531                 return MM_ERROR_SOUND_INTERNAL;
 532         }
 533
 534         _dbus_unsubscribe_signal(conn, (guint) subs_id);
 535
 536         return MM_ERROR_NONE;
 537 }
 538
 539 EXPORT_API
 540 int mm_sound_dbus_emit_signal(audio_provider_t provider, audio_event_t event, GVariant *param)
 541 {
 542         GDBusConnection *conn;
 543         GError *err = NULL;
 544         gboolean dbus_ret;
 545
 546         if (event < 0 || event >= AUDIO_EVENT_MAX) {
 547                 debug_error ("emit signal failed, invalid argument, event_type(%d)", event);
 548                 return MM_ERROR_INVALID_ARGUMENT;
 549         }
 550
 551         if (!(conn = _dbus_get_connection(G_BUS_TYPE_SYSTEM))) {
 552                 debug_error("Get Dbus Connection Error");
 553                 return MM_ERROR_SOUND_INTERNAL;
 554         }
 555
 556         dbus_ret = g_dbus_connection_emit_signal (conn,
 557                                                   NULL, g_paths[provider].object,
 558                                                   g_paths[provider].interface, g_events[event].name,
 559                                                   param, &err);
 560         if (!dbus_ret) {
 561                 debug_error ("g_dbus_connection_emit_signal() error (%s)", err->message);
 562                 g_error_free(err);
 563                 return MM_ERROR_SOUND_INTERNAL;
 564         }
 565         g_dbus_connection_flush_sync(conn, NULL, NULL);
 566
 567         debug_msg ("emit signal for [%s]  success", g_events[event].name);
 568         return MM_ERROR_NONE;
 569 }
 570
 571 EXPORT_API
 572 int mm_sound_dbus_get_event_name(audio_event_t event, const char **event_name)
 573 {
 574         if (!event_name) {
 575                 debug_error("Invalid Parameter, event_name NULL");
 576                 return MM_ERROR_INVALID_ARGUMENT;
 577         }
 578         if (event < 0 || event >= AUDIO_EVENT_MAX) {
 579                 debug_error("invalid event : %d", event);
 580                 return MM_ERROR_INVALID_ARGUMENT;
 581         }
 582
 583         *event_name = g_events[event].name;
 584         return MM_ERROR_NONE;
 585 }
 586
 587 EXPORT_API
 588 int mm_sound_dbus_get_method_name(audio_method_t method, const char **method_name)
 589 {
 590         if (!method_name) {
 591                 debug_error("Invalid Parameter, method_name NULL");
 592                 return MM_ERROR_INVALID_ARGUMENT;
 593         }
 594         if (method < 0 || method >= AUDIO_METHOD_MAX) {
 595                 debug_error("invalid method : %d", method);
 596                 return MM_ERROR_INVALID_ARGUMENT;
 597         }
 598
 599         *method_name = g_methods[method].name;
 600         return MM_ERROR_NONE;
 601 }