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 #include "dbus_constants.h"
  30 #include "dbus/helpers.h"
  31
  32 static void (* g_renamed_callback)(const char * new_studio_name) = NULL;
  33 static void (* g_started_callback)(void) = NULL;
  34 static void (* g_stopped_callback)(void) = NULL;
  35
  36 static void on_studio_renamed(void * context, DBusMessage * message_ptr)
  37 {
  38   char * name;
  39
  40   if (!dbus_message_get_args(message_ptr, &g_dbus_error, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID))
  41   {
  42     log_error("Invalid parameters of StudioRenamed signal: %s",  g_dbus_error.message);
  43     dbus_error_free(&g_dbus_error);
  44   }
  45   else
  46   {
  47     log_info("StudioRenamed");
  48
  49     if (g_renamed_callback != NULL)
  50     {
  51       g_renamed_callback(name);
  52     }
  53   }
  54 }
  55
  56 static void on_studio_started(void * context, DBusMessage * message_ptr)
  57 {
  58   log_info("StudioStarted");
  59
  60   if (g_started_callback != NULL)
  61   {
  62     g_started_callback();
  63   }
  64 }
  65
  66 static void on_studio_stopped(void * context, DBusMessage * message_ptr)
  67 {
  68   log_info("StudioStopped");
  69
  70   if (g_stopped_callback != NULL)
  71   {
  72     g_stopped_callback();
  73   }
  74 }
  75
  76 static void on_room_appeared(void * context, DBusMessage * message_ptr)
  77 {
  78   log_info("RoomAppeared");
  79 }
  80
  81 static void on_room_disappeared(void * context, DBusMessage * message_ptr)
  82 {
  83   log_info("RoomDisappeared");
  84 }
  85
  86 /* this must be static because it is referenced by the
  87  * dbus helper layer when hooks are active */
  88 static struct dbus_signal_hook g_signal_hooks[] =
  89 {
  90   {"StudioRenamed", on_studio_renamed},
  91   {"StudioStarted", on_studio_started},
  92   {"StudioStopped", on_studio_stopped},
  93   {"RoomAppeared", on_room_appeared},
  94   {"RoomDisappeared", on_room_disappeared},
  95   {NULL, NULL}
  96 };
  97
  98 bool studio_proxy_init(void)
  99 {
 100   if (!dbus_register_object_signal_hooks(
 101         g_dbus_connection,
 102         SERVICE_NAME,
 103         STUDIO_OBJECT_PATH,
 104         IFACE_STUDIO,
 105         NULL,
 106         g_signal_hooks))
 107   {
 108     log_error("dbus_register_object_signal_hooks() failed");
 109     return false;
 110   }
 111
 112   return true;
 113 }
 114
 115 void studio_proxy_uninit(void)
 116 {
 117   dbus_unregister_object_signal_hooks(g_dbus_connection, SERVICE_NAME, STUDIO_OBJECT_PATH, IFACE_STUDIO);
 118 }
 119
 120 bool studio_proxy_get_name(char ** name_ptr)
 121 {
 122   const char * name;
 123   if (!dbus_call(SERVICE_NAME, STUDIO_OBJECT_PATH, IFACE_STUDIO, "GetName", "", "s", &name))
 124   {
 125     return false;
 126   }
 127
 128   *name_ptr = strdup(name);
 129   if (*name_ptr == NULL)
 130   {
 131     log_error("strdup() failed to duplicate studio name");
 132     return false;
 133   }
 134
 135   return true;
 136 }
 137
 138 bool studio_proxy_rename(const char * name)
 139 {
 140   return dbus_call(SERVICE_NAME, STUDIO_OBJECT_PATH, IFACE_STUDIO, "Rename", "s", &name, "");
 141 }
 142
 143 bool studio_proxy_save(void)
 144 {
 145   return dbus_call(SERVICE_NAME, STUDIO_OBJECT_PATH, IFACE_STUDIO, "Save", "", "");
 146 }
 147
 148 bool studio_proxy_unload(void)
 149 {
 150   return dbus_call(SERVICE_NAME, STUDIO_OBJECT_PATH, IFACE_STUDIO, "Unload", "", "");
 151 }
 152
 153 void studio_proxy_set_renamed_callback(void (* callback)(const char * new_studio_name))
 154 {
 155   g_renamed_callback = callback;
 156 }
 157
 158 void studio_proxy_set_startstop_callbacks(void (* started_callback)(void), void (* stopped_callback)(void))
 159 {
 160   g_started_callback = started_callback;
 161   g_stopped_callback = stopped_callback;
 162 }
 163
 164 bool studio_proxy_start(void)
 165 {
 166   return dbus_call(SERVICE_NAME, STUDIO_OBJECT_PATH, IFACE_STUDIO, "Start", "", "");
 167 }
 168
 169 bool studio_proxy_stop(void)
 170 {
 171   return dbus_call(SERVICE_NAME, STUDIO_OBJECT_PATH, IFACE_STUDIO, "Stop", "", "");
 172 }