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 #include <string.h>
  29
  30 #include <pulse/xmalloc.h>
  31 #include <pulsecore/module.h>
  32 #include <pulsecore/core-util.h>
  33 #include <pulsecore/modargs.h>
  34 #include <pulsecore/macro.h>
  35 #include <pulsecore/llist.h>
  36 #include <pulsecore/core-util.h>
  37 #include <pulsecore/dbus-shared.h>
  38
  39 #include "module-bluetooth-discover-symdef.h"
  40 #include "bluetooth-util.h"
  41
  42 PA_MODULE_AUTHOR("Joao Paulo Rechi Vita");
  43 PA_MODULE_DESCRIPTION("Detect available bluetooth audio devices and load bluetooth audio drivers");
  44 PA_MODULE_VERSION(PACKAGE_VERSION);
  45 PA_MODULE_USAGE("async=<Asynchronous initialization?>");
  46 PA_MODULE_LOAD_ONCE(TRUE);
  47
  48 /*
  49 #ifdef NOKIA
  50    "sco_sink=<name of sink> "
  51    "sco_source=<name of source>"
  52 #endif
  53 */
  54
  55 static const char* const valid_modargs[] = {
  56 #ifdef NOKIA
  57     "sco_sink",
  58     "sco_source",
  59 #endif
  60     "async",
  61     NULL
  62 };
  63
  64 struct userdata {
  65     pa_module *module;
  66     pa_modargs *modargs;
  67     pa_core *core;
  68     pa_bluetooth_discovery *discovery;
  69     pa_hook_slot *slot;
  70     pa_hashmap *hashmap;
  71 };
  72
  73 struct module_info {
  74     char *path;
  75     uint32_t module;
  76 };
  77
  78 static pa_hook_result_t load_module_for_device(pa_bluetooth_discovery *y, const pa_bluetooth_device *d, struct userdata *u) {
  79     struct module_info *mi;
  80
  81     pa_assert(u);
  82     pa_assert(d);
  83
  84     mi = pa_hashmap_get(u->hashmap, d->path);
  85
  86     pa_log("dead: %d, device_connected: %d, audio_state: %d, audio_source_state: %d", d->dead, d->device_connected, d->audio_state, d->audio_source_state);
  87     if (!d->dead &&
  88         d->device_connected > 0 && (d->audio_state >= PA_BT_AUDIO_STATE_CONNECTED || d->audio_source_state >= PA_BT_AUDIO_STATE_CONNECTED)) {
  89
  90         if (!mi) {
  91             pa_module *m = NULL;
  92             char *args;
  93
  94             /* Oh, awesome, a new device has shown up and been connected! */
  95
  96             args = pa_sprintf_malloc("address=\"%s\" path=\"%s\"", d->address, d->path);
  97 #if 0
  98             /* This is in case we have to use hsp immediately, without waiting for .Audio.State = Connected */
  99             if (d->headset_state >= PA_BT_AUDIO_STATE_CONNECTED && somecondition) {
 100                 char *tmp;
 101                 tmp = pa_sprintf_malloc("%s profile=\"hsp\"", args);
 102                 pa_xfree(args);
 103                 args = tmp;
 104             }
 105 #endif
 106
 107 #ifdef NOKIA
 108             if (pa_modargs_get_value(u->modargs, "sco_sink", NULL) &&
 109                 pa_modargs_get_value(u->modargs, "sco_source", NULL)) {
 110                 char *tmp;
 111
 112                 tmp = pa_sprintf_malloc("%s sco_sink=\"%s\" sco_source=\"%s\"", args,
 113                                         pa_modargs_get_value(u->modargs, "sco_sink", NULL),
 114                                         pa_modargs_get_value(u->modargs, "sco_source", NULL));
 115                 pa_xfree(args);
 116                 args = tmp;
 117             }
 118 #endif
 119
 120             if (d->audio_source_state >= PA_BT_AUDIO_STATE_CONNECTED)
 121                 args = pa_sprintf_malloc("%s profile=\"a2dp_source\"", args);
 122
 123             pa_log_debug("Loading module-bluetooth-device %s", args);
 124             m = pa_module_load(u->module->core, "module-bluetooth-device", args);
 125             pa_xfree(args);
 126
 127             if (m) {
 128                 mi = pa_xnew(struct module_info, 1);
 129                 mi->module = m->index;
 130                 mi->path = pa_xstrdup(d->path);
 131
 132                 pa_hashmap_put(u->hashmap, mi->path, mi);
 133             } else
 134                 pa_log_debug("Failed to load module for device %s", d->path);
 135         }
 136
 137     } else {
 138
 139         if (mi) {
 140
 141             /* Hmm, disconnection? Then let's unload our module */
 142
 143             pa_log_debug("Unloading module for %s", d->path);
 144             pa_module_unload_request_by_index(u->core, mi->module, TRUE);
 145
 146             pa_hashmap_remove(u->hashmap, mi->path);
 147             pa_xfree(mi->path);
 148             pa_xfree(mi);
 149         }
 150     }
 151
 152     return PA_HOOK_OK;
 153 }
 154
 155 int pa__init(pa_module* m) {
 156     struct userdata *u;
 157     pa_modargs *ma = NULL;
 158     pa_bool_t async = FALSE;
 159
 160     pa_assert(m);
 161
 162     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 163         pa_log("Failed to parse module arguments");
 164         goto fail;
 165     }
 166
 167     if (pa_modargs_get_value_boolean(ma, "async", &async) < 0) {
 168         pa_log("Failed to parse async argument.");
 169         goto fail;
 170     }
 171
 172     m->userdata = u = pa_xnew0(struct userdata, 1);
 173     u->module = m;
 174     u->core = m->core;
 175     u->modargs = ma;
 176     ma = NULL;
 177     u->hashmap = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
 178
 179     if (!(u->discovery = pa_bluetooth_discovery_get(u->core)))
 180         goto fail;
 181
 182     u->slot = pa_hook_connect(pa_bluetooth_discovery_hook(u->discovery), PA_HOOK_NORMAL, (pa_hook_cb_t) load_module_for_device, u);
 183
 184     if (!async)
 185         pa_bluetooth_discovery_sync(u->discovery);
 186
 187     return 0;
 188
 189 fail:
 190     pa__done(m);
 191
 192     if (ma)
 193         pa_modargs_free(ma);
 194
 195     return -1;
 196 }
 197
 198 void pa__done(pa_module* m) {
 199     struct userdata *u;
 200
 201     pa_assert(m);
 202
 203     if (!(u = m->userdata))
 204         return;
 205
 206     if (u->slot)
 207         pa_hook_slot_free(u->slot);
 208
 209     if (u->discovery)
 210         pa_bluetooth_discovery_unref(u->discovery);
 211
 212     if (u->hashmap) {
 213         struct module_info *mi;
 214
 215         while ((mi = pa_hashmap_steal_first(u->hashmap))) {
 216             pa_xfree(mi->path);
 217             pa_xfree(mi);
 218         }
 219
 220         pa_hashmap_free(u->hashmap, NULL, NULL);
 221     }
 222
 223     if (u->modargs)
 224         pa_modargs_free(u->modargs);
 225
 226     pa_xfree(u);
 227 }