code.delx.au - pulseaudio/blob - src/modules/bluetooth/module-bluetooth-discover.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2008-2009 Joao 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 <stdio.h>
  27 #include <stdlib.h>
  28
  29 #include <pulse/xmalloc.h>
  30 #include <pulsecore/module.h>
  31 #include <pulsecore/core-util.h>
  32 #include <pulsecore/modargs.h>
  33 #include <pulsecore/macro.h>
  34 #include <pulsecore/core-util.h>
  35 #include <pulsecore/dbus-shared.h>
  36
  37 #include "module-bluetooth-discover-symdef.h"
  38 #include "bluetooth-util.h"
  39
  40 PA_MODULE_AUTHOR("Joao Paulo Rechi Vita");
  41 PA_MODULE_DESCRIPTION("Detect available bluetooth audio devices and load bluetooth audio drivers");
  42 PA_MODULE_VERSION(PACKAGE_VERSION);
  43 PA_MODULE_USAGE("async=<Asynchronous initialization?> "
  44                 "sco_sink=<name of sink> "
  45                 "sco_source=<name of source> ");
  46 PA_MODULE_LOAD_ONCE(TRUE);
  47
  48 static const char* const valid_modargs[] = {
  49     "sco_sink",
  50     "sco_source",
  51     "async",
  52     NULL
  53 };
  54
  55 struct userdata {
  56     pa_module *module;
  57     pa_modargs *modargs;
  58     pa_core *core;
  59     pa_bluetooth_discovery *discovery;
  60     pa_hook_slot *slot;
  61     pa_hashmap *hashmap;
  62 };
  63
  64 struct module_info {
  65     char *path;
  66     uint32_t module;
  67 };
  68
  69 static pa_hook_result_t load_module_for_device(pa_bluetooth_discovery *y, const pa_bluetooth_device *d, struct userdata *u) {
  70     struct module_info *mi;
  71
  72     pa_assert(u);
  73     pa_assert(d);
  74
  75     mi = pa_hashmap_get(u->hashmap, d->path);
  76
  77     if (!d->dead && d->device_connected > 0 &&
  78         (d->audio_state >= PA_BT_AUDIO_STATE_CONNECTED ||
  79          d->audio_source_state >= PA_BT_AUDIO_STATE_CONNECTED ||
  80          d->hfgw_state >= PA_BT_AUDIO_STATE_CONNECTED)) {
  81
  82         if (!mi) {
  83             pa_module *m = NULL;
  84             char *args;
  85
  86             /* Oh, awesome, a new device has shown up and been connected! */
  87
  88             args = pa_sprintf_malloc("address=\"%s\" path=\"%s\"", d->address, d->path);
  89
  90             if (pa_modargs_get_value(u->modargs, "sco_sink", NULL) &&
  91                 pa_modargs_get_value(u->modargs, "sco_source", NULL)) {
  92                 char *tmp;
  93
  94                 tmp = pa_sprintf_malloc("%s sco_sink=\"%s\" sco_source=\"%s\"", args,
  95                                         pa_modargs_get_value(u->modargs, "sco_sink", NULL),
  96                                         pa_modargs_get_value(u->modargs, "sco_source", NULL));
  97                 pa_xfree(args);
  98                 args = tmp;
  99             }
 100
 101             pa_log_debug("Loading module-bluetooth-device %s", args);
 102             m = pa_module_load(u->module->core, "module-bluetooth-device", args);
 103             pa_xfree(args);
 104
 105             if (m) {
 106                 mi = pa_xnew(struct module_info, 1);
 107                 mi->module = m->index;
 108                 mi->path = pa_xstrdup(d->path);
 109
 110                 pa_hashmap_put(u->hashmap, mi->path, mi);
 111             } else
 112                 pa_log_debug("Failed to load module for device %s", d->path);
 113         }
 114
 115     } else {
 116
 117         if (mi) {
 118
 119             /* Hmm, disconnection? Then let's unload our module */
 120
 121             pa_log_debug("Unloading module for %s", d->path);
 122             pa_module_unload_request_by_index(u->core, mi->module, TRUE);
 123
 124             pa_hashmap_remove(u->hashmap, mi->path);
 125             pa_xfree(mi->path);
 126             pa_xfree(mi);
 127         }
 128     }
 129
 130     return PA_HOOK_OK;
 131 }
 132
 133 int pa__init(pa_module* m) {
 134     struct userdata *u;
 135     pa_modargs *ma = NULL;
 136     pa_bool_t async = FALSE;
 137
 138     pa_assert(m);
 139
 140     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 141         pa_log("Failed to parse module arguments");
 142         goto fail;
 143     }
 144
 145     if (pa_modargs_get_value_boolean(ma, "async", &async) < 0) {
 146         pa_log("Failed to parse async argument.");
 147         goto fail;
 148     }
 149
 150     m->userdata = u = pa_xnew0(struct userdata, 1);
 151     u->module = m;
 152     u->core = m->core;
 153     u->modargs = ma;
 154     ma = NULL;
 155     u->hashmap = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
 156
 157     if (!(u->discovery = pa_bluetooth_discovery_get(u->core)))
 158         goto fail;
 159
 160     u->slot = pa_hook_connect(pa_bluetooth_discovery_hook(u->discovery), PA_HOOK_NORMAL, (pa_hook_cb_t) load_module_for_device, u);
 161
 162     if (!async)
 163         pa_bluetooth_discovery_sync(u->discovery);
 164
 165     return 0;
 166
 167 fail:
 168     pa__done(m);
 169
 170     if (ma)
 171         pa_modargs_free(ma);
 172
 173     return -1;
 174 }
 175
 176 void pa__done(pa_module* m) {
 177     struct userdata *u;
 178
 179     pa_assert(m);
 180
 181     if (!(u = m->userdata))
 182         return;
 183
 184     if (u->slot)
 185         pa_hook_slot_free(u->slot);
 186
 187     if (u->discovery)
 188         pa_bluetooth_discovery_unref(u->discovery);
 189
 190     if (u->hashmap) {
 191         struct module_info *mi;
 192
 193         while ((mi = pa_hashmap_steal_first(u->hashmap))) {
 194             pa_xfree(mi->path);
 195             pa_xfree(mi);
 196         }
 197
 198         pa_hashmap_free(u->hashmap, NULL, NULL);
 199     }
 200
 201     if (u->modargs)
 202         pa_modargs_free(u->modargs);
 203
 204     pa_xfree(u);
 205 }