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 #if 0
  90             /* This is in case we have to use hsp immediately, without waiting for .Audio.State = Connected */
  91             if (d->headset_state >= PA_BT_AUDIO_STATE_CONNECTED && somecondition) {
  92                 char *tmp;
  93                 tmp = pa_sprintf_malloc("%s profile=\"hsp\"", args);
  94                 pa_xfree(args);
  95                 args = tmp;
  96             }
  97 #endif
  98
  99             if (pa_modargs_get_value(u->modargs, "sco_sink", NULL) &&
 100                 pa_modargs_get_value(u->modargs, "sco_source", NULL)) {
 101                 char *tmp;
 102
 103                 tmp = pa_sprintf_malloc("%s sco_sink=\"%s\" sco_source=\"%s\"", args,
 104                                         pa_modargs_get_value(u->modargs, "sco_sink", NULL),
 105                                         pa_modargs_get_value(u->modargs, "sco_source", NULL));
 106                 pa_xfree(args);
 107                 args = tmp;
 108             }
 109
 110             if (d->audio_source_state >= PA_BT_AUDIO_STATE_CONNECTED)
 111                 args = pa_sprintf_malloc("%s profile=\"a2dp_source\" auto_connect=no", args);
 112
 113             if (d->hfgw_state > PA_BT_AUDIO_STATE_CONNECTED)
 114                 args = pa_sprintf_malloc("%s profile=\"hfgw\"", args);
 115
 116             pa_log_debug("Loading module-bluetooth-device %s", args);
 117             m = pa_module_load(u->module->core, "module-bluetooth-device", args);
 118             pa_xfree(args);
 119
 120             if (m) {
 121                 mi = pa_xnew(struct module_info, 1);
 122                 mi->module = m->index;
 123                 mi->path = pa_xstrdup(d->path);
 124
 125                 pa_hashmap_put(u->hashmap, mi->path, mi);
 126             } else
 127                 pa_log_debug("Failed to load module for device %s", d->path);
 128         }
 129
 130     } else {
 131
 132         if (mi) {
 133
 134             /* Hmm, disconnection? Then let's unload our module */
 135
 136             pa_log_debug("Unloading module for %s", d->path);
 137             pa_module_unload_request_by_index(u->core, mi->module, TRUE);
 138
 139             pa_hashmap_remove(u->hashmap, mi->path);
 140             pa_xfree(mi->path);
 141             pa_xfree(mi);
 142         }
 143     }
 144
 145     return PA_HOOK_OK;
 146 }
 147
 148 int pa__init(pa_module* m) {
 149     struct userdata *u;
 150     pa_modargs *ma = NULL;
 151     pa_bool_t async = FALSE;
 152
 153     pa_assert(m);
 154
 155     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 156         pa_log("Failed to parse module arguments");
 157         goto fail;
 158     }
 159
 160     if (pa_modargs_get_value_boolean(ma, "async", &async) < 0) {
 161         pa_log("Failed to parse async argument.");
 162         goto fail;
 163     }
 164
 165     m->userdata = u = pa_xnew0(struct userdata, 1);
 166     u->module = m;
 167     u->core = m->core;
 168     u->modargs = ma;
 169     ma = NULL;
 170     u->hashmap = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
 171
 172     if (!(u->discovery = pa_bluetooth_discovery_get(u->core)))
 173         goto fail;
 174
 175     u->slot = pa_hook_connect(pa_bluetooth_discovery_hook(u->discovery), PA_HOOK_NORMAL, (pa_hook_cb_t) load_module_for_device, u);
 176
 177     if (!async)
 178         pa_bluetooth_discovery_sync(u->discovery);
 179
 180     return 0;
 181
 182 fail:
 183     pa__done(m);
 184
 185     if (ma)
 186         pa_modargs_free(ma);
 187
 188     return -1;
 189 }
 190
 191 void pa__done(pa_module* m) {
 192     struct userdata *u;
 193
 194     pa_assert(m);
 195
 196     if (!(u = m->userdata))
 197         return;
 198
 199     if (u->slot)
 200         pa_hook_slot_free(u->slot);
 201
 202     if (u->discovery)
 203         pa_bluetooth_discovery_unref(u->discovery);
 204
 205     if (u->hashmap) {
 206         struct module_info *mi;
 207
 208         while ((mi = pa_hashmap_steal_first(u->hashmap))) {
 209             pa_xfree(mi->path);
 210             pa_xfree(mi);
 211         }
 212
 213         pa_hashmap_free(u->hashmap, NULL, NULL);
 214     }
 215
 216     if (u->modargs)
 217         pa_modargs_free(u->modargs);
 218
 219     pa_xfree(u);
 220 }