code.delx.au - pulseaudio/blob - src/modules/bluetooth/bluez5-util.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2008-2013 João Paulo Rechi Vita
   5
   6   PulseAudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as
   8   published by the Free Software Foundation; either version 2.1 of the
   9   License, or (at your option) any later version.
  10
  11   PulseAudio is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public
  17   License along with PulseAudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <pulse/xmalloc.h>
  27
  28 #include <pulsecore/core.h>
  29 #include <pulsecore/core-util.h>
  30 #include <pulsecore/dbus-shared.h>
  31 #include <pulsecore/log.h>
  32 #include <pulsecore/macro.h>
  33 #include <pulsecore/refcnt.h>
  34 #include <pulsecore/shared.h>
  35
  36 #include "bluez5-util.h"
  37
  38 #define BLUEZ_SERVICE "org.bluez"
  39
  40 struct pa_bluetooth_discovery {
  41     PA_REFCNT_DECLARE;
  42
  43     pa_core *core;
  44     pa_dbus_connection *connection;
  45     bool filter_added;
  46     bool matches_added;
  47 };
  48
  49 static DBusHandlerResult filter_cb(DBusConnection *bus, DBusMessage *m, void *userdata) {
  50     pa_bluetooth_discovery *y;
  51     DBusError err;
  52
  53     pa_assert(bus);
  54     pa_assert(m);
  55     pa_assert_se(y = userdata);
  56
  57     dbus_error_init(&err);
  58
  59     if (dbus_message_is_signal(m, "org.freedesktop.DBus", "NameOwnerChanged")) {
  60         const char *name, *old_owner, *new_owner;
  61
  62         if (!dbus_message_get_args(m, &err,
  63                                    DBUS_TYPE_STRING, &name,
  64                                    DBUS_TYPE_STRING, &old_owner,
  65                                    DBUS_TYPE_STRING, &new_owner,
  66                                    DBUS_TYPE_INVALID)) {
  67             pa_log_error("Failed to parse org.freedesktop.DBus.NameOwnerChanged: %s", err.message);
  68             goto fail;
  69         }
  70
  71         if (pa_streq(name, BLUEZ_SERVICE)) {
  72             if (old_owner && *old_owner) {
  73                 pa_log_debug("Bluetooth daemon disappeared");
  74                 /* TODO: remove all devices */
  75             }
  76
  77             if (new_owner && *new_owner) {
  78                 pa_log_debug("Bluetooth daemon appeared");
  79                 /* TODO: get managed objects */
  80             }
  81         }
  82
  83         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
  84     }
  85
  86 fail:
  87     dbus_error_free(&err);
  88
  89     return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
  90 }
  91
  92 pa_bluetooth_discovery* pa_bluetooth_discovery_get(pa_core *c) {
  93     pa_bluetooth_discovery *y;
  94     DBusError err;
  95     DBusConnection *conn;
  96
  97     if ((y = pa_shared_get(c, "bluetooth-discovery")))
  98         return pa_bluetooth_discovery_ref(y);
  99
 100     y = pa_xnew0(pa_bluetooth_discovery, 1);
 101     PA_REFCNT_INIT(y);
 102     y->core = c;
 103
 104     pa_shared_set(c, "bluetooth-discovery", y);
 105
 106     dbus_error_init(&err);
 107
 108     if (!(y->connection = pa_dbus_bus_get(y->core, DBUS_BUS_SYSTEM, &err))) {
 109         pa_log_error("Failed to get D-Bus connection: %s", err.message);
 110         goto fail;
 111     }
 112
 113     conn = pa_dbus_connection_get(y->connection);
 114
 115     /* dynamic detection of bluetooth audio devices */
 116     if (!dbus_connection_add_filter(conn, filter_cb, y, NULL)) {
 117         pa_log_error("Failed to add filter function");
 118         goto fail;
 119     }
 120     y->filter_added = true;
 121
 122     if (pa_dbus_add_matches(conn, &err,
 123             "type='signal',sender='org.freedesktop.DBus',interface='org.freedesktop.DBus',member='NameOwnerChanged'"
 124             ",arg0='" BLUEZ_SERVICE "'",
 125             NULL) < 0) {
 126         pa_log_error("Failed to add D-Bus matches: %s", err.message);
 127         goto fail;
 128     }
 129     y->matches_added = true;
 130
 131     return y;
 132
 133 fail:
 134     pa_bluetooth_discovery_unref(y);
 135     dbus_error_free(&err);
 136
 137     return NULL;
 138 }
 139
 140 pa_bluetooth_discovery* pa_bluetooth_discovery_ref(pa_bluetooth_discovery *y) {
 141     pa_assert(y);
 142     pa_assert(PA_REFCNT_VALUE(y) > 0);
 143
 144     PA_REFCNT_INC(y);
 145
 146     return y;
 147 }
 148
 149 void pa_bluetooth_discovery_unref(pa_bluetooth_discovery *y) {
 150     pa_assert(y);
 151     pa_assert(PA_REFCNT_VALUE(y) > 0);
 152
 153     if (PA_REFCNT_DEC(y) > 0)
 154         return;
 155
 156     if (y->connection) {
 157
 158         if (y->matches_added)
 159             pa_dbus_remove_matches(pa_dbus_connection_get(y->connection),
 160                 "type='signal',sender='org.freedesktop.DBus',interface='org.freedesktop.DBus',member='NameOwnerChanged',"
 161                 "arg0='" BLUEZ_SERVICE "'",
 162                 NULL);
 163
 164         if (y->filter_added)
 165             dbus_connection_remove_filter(pa_dbus_connection_get(y->connection), filter_cb, y);
 166
 167         pa_dbus_connection_unref(y->connection);
 168     }
 169
 170     pa_shared_remove(y->core, "bluetooth-discovery");
 171     pa_xfree(y);
 172 }