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