proxies/studio_proxy.c

   1 /* -*- Mode: C ; c-basic-offset: 2 -*- */
   2 /*
   3  * LADI Session Handler (ladish)
   4  *
   5  * Copyright (C) 2009 Nedko Arnaudov <nedko@arnaudov.name>
   6  *
   7  **************************************************************************
   8  * This file contains implementation of the helper functionality
   9  * for accessing Studio object through D-Bus
  10  **************************************************************************
  11  *
  12  * LADI Session Handler is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * LADI Session Handler is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with LADI Session Handler. If not, see <http://www.gnu.org/licenses/>
  24  * or write to the Free Software Foundation, Inc.,
  25  * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  26  */
  27
  28 #include "common.h"
  29
  30 static void (* g_renamed_callback)(const char * new_studio_name) = NULL;
  31 static void (* g_started_callback)(void) = NULL;
  32 static void (* g_stopped_callback)(void) = NULL;
  33 static void (* g_crashed_callback)(void) = NULL;
  34
  35 static void on_studio_renamed(void * context, DBusMessage * message_ptr)
  36 {
  37   char * name;
  38
  39   if (!dbus_message_get_args(message_ptr, &g_dbus_error, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID))
  40   {
  41     log_error("Invalid parameters of StudioRenamed signal: %s",  g_dbus_error.message);
  42     dbus_error_free(&g_dbus_error);
  43   }
  44   else
  45   {
  46     log_info("StudioRenamed");
  47
  48     if (g_renamed_callback != NULL)
  49     {
  50       g_renamed_callback(name);
  51     }
  52   }
  53 }
  54
  55 static void on_studio_started(void * context, DBusMessage * message_ptr)
  56 {
  57   log_info("StudioStarted");
  58
  59   if (g_started_callback != NULL)
  60   {
  61     g_started_callback();
  62   }
  63 }
  64
  65 static void on_studio_stopped(void * context, DBusMessage * message_ptr)
  66 {
  67   log_info("StudioStopped");
  68
  69   if (g_stopped_callback != NULL)
  70   {
  71     g_stopped_callback();
  72   }
  73 }
  74
  75 static void on_studio_crashed(void * context, DBusMessage * message_ptr)
  76 {
  77   log_info("StudioCrashed");
  78
  79   if (g_crashed_callback != NULL)
  80   {
  81     g_crashed_callback();
  82   }
  83 }
  84
  85 static void on_room_appeared(void * context, DBusMessage * message_ptr)
  86 {
  87   log_info("RoomAppeared");
  88 }
  89
  90 static void on_room_disappeared(void * context, DBusMessage * message_ptr)
  91 {
  92   log_info("RoomDisappeared");
  93 }
  94
  95 /* this must be static because it is referenced by the
  96  * dbus helper layer when hooks are active */
  97 static struct dbus_signal_hook g_signal_hooks[] =
  98 {
  99   {"StudioRenamed", on_studio_renamed},
 100   {"StudioStarted", on_studio_started},
 101   {"StudioStopped", on_studio_stopped},
 102   {"StudioCrashed", on_studio_crashed},
 103   {"RoomAppeared", on_room_appeared},
 104   {"RoomDisappeared", on_room_disappeared},
 105   {NULL, NULL}
 106 };
 107
 108 bool studio_proxy_init(void)
 109 {
 110   if (!dbus_register_object_signal_hooks(
 111         g_dbus_connection,
 112         SERVICE_NAME,
 113         STUDIO_OBJECT_PATH,
 114         IFACE_STUDIO,
 115         NULL,
 116         g_signal_hooks))
 117   {
 118     log_error("dbus_register_object_signal_hooks() failed");
 119     return false;
 120   }
 121
 122   return true;
 123 }
 124
 125 void studio_proxy_uninit(void)
 126 {
 127   dbus_unregister_object_signal_hooks(g_dbus_connection, SERVICE_NAME, STUDIO_OBJECT_PATH, IFACE_STUDIO);
 128 }
 129
 130 bool studio_proxy_get_name(char ** name_ptr)
 131 {
 132   const char * name;
 133   if (!dbus_call(SERVICE_NAME, STUDIO_OBJECT_PATH, IFACE_STUDIO, "GetName", "", "s", &name))
 134   {
 135     return false;
 136   }
 137
 138   *name_ptr = strdup(name);
 139   if (*name_ptr == NULL)
 140   {
 141     log_error("strdup() failed to duplicate studio name");
 142     return false;
 143   }
 144
 145   return true;
 146 }
 147
 148 bool studio_proxy_rename(const char * name)
 149 {
 150   return dbus_call(SERVICE_NAME, STUDIO_OBJECT_PATH, IFACE_STUDIO, "Rename", "s", &name, "");
 151 }
 152
 153 bool studio_proxy_save(void)
 154 {
 155   return dbus_call(SERVICE_NAME, STUDIO_OBJECT_PATH, IFACE_STUDIO, "Save", "", "");
 156 }
 157
 158 bool studio_proxy_unload(void)
 159 {
 160   return dbus_call(SERVICE_NAME, STUDIO_OBJECT_PATH, IFACE_STUDIO, "Unload", "", "");
 161 }
 162
 163 void studio_proxy_set_renamed_callback(void (* callback)(const char * new_studio_name))
 164 {
 165   g_renamed_callback = callback;
 166 }
 167
 168 void studio_proxy_set_startstop_callbacks(void (* started_callback)(void), void (* stopped_callback)(void), void (* crashed_callback)(void))
 169 {
 170   g_started_callback = started_callback;
 171   g_stopped_callback = stopped_callback;
 172   g_crashed_callback = crashed_callback;
 173 }
 174
 175 bool studio_proxy_start(void)
 176 {
 177   return dbus_call(SERVICE_NAME, STUDIO_OBJECT_PATH, IFACE_STUDIO, "Start", "", "");
 178 }
 179
 180 bool studio_proxy_stop(void)
 181 {
 182   return dbus_call(SERVICE_NAME, STUDIO_OBJECT_PATH, IFACE_STUDIO, "Stop", "", "");
 183 }