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

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2006 Lennart Poettering
   5   Copyright 2009 Canonical Ltd
   6   Copyright (C) 2012 Intel Corporation
   7
   8   PulseAudio is free software; you can redistribute it and/or modify
   9   it under the terms of the GNU Lesser General Public License as published
  10   by the Free Software Foundation; either version 2.1 of the License,
  11   or (at your option) any later version.
  12
  13   PulseAudio is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with PulseAudio; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21   USA.
  22 ***/
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include <pulse/xmalloc.h>
  29
  30 #include <pulsecore/core.h>
  31 #include <pulsecore/modargs.h>
  32 #include <pulsecore/source-output.h>
  33 #include <pulsecore/source.h>
  34 #include <pulsecore/core-util.h>
  35
  36 #include "module-bluetooth-policy-symdef.h"
  37
  38 PA_MODULE_AUTHOR("Frédéric Dalleau");
  39 PA_MODULE_DESCRIPTION("When a bluetooth sink or source is added, load module-loopback");
  40 PA_MODULE_VERSION(PACKAGE_VERSION);
  41 PA_MODULE_LOAD_ONCE(true);
  42 PA_MODULE_USAGE(
  43         "a2dp_source=<Handle a2dp_source card profile (sink role)?> "
  44         "hfgw=<Handle hfgw card profile (headset role)?>");
  45
  46 static const char* const valid_modargs[] = {
  47     "a2dp_source",
  48     "hfgw",
  49     NULL
  50 };
  51
  52 struct userdata {
  53     bool enable_a2dp_source;
  54     bool enable_hfgw;
  55     pa_hook_slot *source_put_slot;
  56     pa_hook_slot *sink_put_slot;
  57     pa_hook_slot *profile_available_changed_slot;
  58 };
  59
  60 /* When a source is created, loopback it to default sink */
  61 static pa_hook_result_t source_put_hook_callback(pa_core *c, pa_source *source, void *userdata) {
  62     struct userdata *u = userdata;
  63     const char *s;
  64     const char *role;
  65     char *args;
  66
  67     pa_assert(c);
  68     pa_assert(source);
  69
  70     /* Only consider bluetooth sinks and sources */
  71     s = pa_proplist_gets(source->proplist, PA_PROP_DEVICE_BUS);
  72     if (!s)
  73         return PA_HOOK_OK;
  74
  75     if (!pa_streq(s, "bluetooth"))
  76         return PA_HOOK_OK;
  77
  78     s = pa_proplist_gets(source->proplist, "bluetooth.protocol");
  79     if (!s)
  80         return PA_HOOK_OK;
  81
  82     if (u->enable_a2dp_source && pa_streq(s, "a2dp_source")) /* A2DP profile (we're doing sink role) */
  83         role = "music";
  84     else if (u->enable_hfgw && pa_streq(s, "hfgw")) /* HFP profile (we're doing headset role) */
  85         role = "phone";
  86     else {
  87         pa_log_debug("Profile %s cannot be selected for loopback", s);
  88         return PA_HOOK_OK;
  89     }
  90
  91     /* Load module-loopback */
  92     args = pa_sprintf_malloc("source=\"%s\" source_dont_move=\"true\" sink_input_properties=\"media.role=%s\"", source->name,
  93                              role);
  94     (void) pa_module_load(c, "module-loopback", args);
  95     pa_xfree(args);
  96
  97     return PA_HOOK_OK;
  98 }
  99
 100 /* When a sink is created, loopback it to default source */
 101 static pa_hook_result_t sink_put_hook_callback(pa_core *c, pa_sink *sink, void *userdata) {
 102     struct userdata *u = userdata;
 103     const char *s;
 104     const char *role;
 105     char *args;
 106
 107     pa_assert(c);
 108     pa_assert(sink);
 109
 110     /* Only consider bluetooth sinks and sources */
 111     s = pa_proplist_gets(sink->proplist, PA_PROP_DEVICE_BUS);
 112     if (!s)
 113         return PA_HOOK_OK;
 114
 115     if (!pa_streq(s, "bluetooth"))
 116         return PA_HOOK_OK;
 117
 118     s = pa_proplist_gets(sink->proplist, "bluetooth.protocol");
 119     if (!s)
 120         return PA_HOOK_OK;
 121
 122     if (u->enable_hfgw && pa_streq(s, "hfgw")) /* HFP profile (we're doing headset role) */
 123         role = "phone";
 124     else {
 125         pa_log_debug("Profile %s cannot be selected for loopback", s);
 126         return PA_HOOK_OK;
 127     }
 128
 129     /* Load module-loopback */
 130     args = pa_sprintf_malloc("sink=\"%s\" sink_dont_move=\"true\" source_output_properties=\"media.role=%s\"", sink->name,
 131                              role);
 132     (void) pa_module_load(c, "module-loopback", args);
 133     pa_xfree(args);
 134
 135     return PA_HOOK_OK;
 136 }
 137
 138 static pa_card_profile *find_best_profile(pa_card *card) {
 139     void *state;
 140     pa_card_profile *profile;
 141     pa_card_profile *result = card->active_profile;
 142     pa_card_profile *off;
 143
 144     pa_assert_se(off = pa_hashmap_get(card->profiles, "off"));
 145
 146     PA_HASHMAP_FOREACH(profile, card->profiles, state) {
 147         if (profile->available == PA_AVAILABLE_NO || profile == off)
 148             continue;
 149
 150         if (result == NULL ||
 151             (profile->available == PA_AVAILABLE_YES && result->available == PA_AVAILABLE_UNKNOWN) ||
 152             (profile->available == result->available && profile->priority > result->priority))
 153             result = profile;
 154     }
 155
 156     return result ? result : off;
 157 }
 158
 159 static pa_hook_result_t profile_available_hook_callback(pa_core *c, pa_card_profile *profile, void *userdata) {
 160     pa_card *card;
 161     const char *s;
 162     bool is_active_profile;
 163     pa_card_profile *selected_profile;
 164
 165     pa_assert(c);
 166     pa_assert(profile);
 167     pa_assert_se((card = profile->card));
 168
 169     /* Only consider bluetooth cards */
 170     s = pa_proplist_gets(card->proplist, PA_PROP_DEVICE_BUS);
 171     if (!s || !pa_streq(s, "bluetooth"))
 172         return PA_HOOK_OK;
 173
 174     /* Do not automatically switch profiles for headsets, just in case */
 175     if (pa_streq(profile->name, "hsp") || pa_streq(profile->name, "a2dp"))
 176         return PA_HOOK_OK;
 177
 178     is_active_profile = card->active_profile == profile;
 179
 180     if (profile->available == PA_AVAILABLE_YES) {
 181         if (is_active_profile)
 182             return PA_HOOK_OK;
 183
 184         if (card->active_profile->available == PA_AVAILABLE_YES && card->active_profile->priority >= profile->priority)
 185             return PA_HOOK_OK;
 186
 187         selected_profile = profile;
 188     } else {
 189         if (!is_active_profile)
 190             return PA_HOOK_OK;
 191
 192         pa_assert_se((selected_profile = find_best_profile(card)));
 193
 194         if (selected_profile == card->active_profile)
 195             return PA_HOOK_OK;
 196     }
 197
 198     pa_log_debug("Setting card '%s' to profile '%s'", card->name, selected_profile->name);
 199
 200     if (pa_card_set_profile(card, selected_profile, false) != 0)
 201         pa_log_warn("Could not set profile '%s'", selected_profile->name);
 202
 203     return PA_HOOK_OK;
 204 }
 205
 206 static void handle_all_profiles(pa_core *core) {
 207     pa_card *card;
 208     uint32_t state;
 209
 210     PA_IDXSET_FOREACH(card, core->cards, state) {
 211         pa_card_profile *profile;
 212         void *state2;
 213
 214         PA_HASHMAP_FOREACH(profile, card->profiles, state2)
 215             profile_available_hook_callback(core, profile, NULL);
 216     }
 217 }
 218
 219 int pa__init(pa_module *m) {
 220     pa_modargs *ma;
 221     struct userdata *u;
 222
 223     pa_assert(m);
 224
 225     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 226         pa_log_error("Failed to parse module arguments");
 227         return -1;
 228     }
 229
 230     m->userdata = u = pa_xnew0(struct userdata, 1);
 231
 232     u->enable_a2dp_source = true;
 233     if (pa_modargs_get_value_boolean(ma, "a2dp_source", &u->enable_a2dp_source) < 0) {
 234         pa_log("Failed to parse a2dp_source argument.");
 235         goto fail;
 236     }
 237
 238     u->enable_hfgw = true;
 239     if (pa_modargs_get_value_boolean(ma, "hfgw", &u->enable_hfgw) < 0) {
 240         pa_log("Failed to parse hfgw argument.");
 241         goto fail;
 242     }
 243
 244     u->source_put_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_PUT], PA_HOOK_NORMAL,
 245                                          (pa_hook_cb_t) source_put_hook_callback, u);
 246
 247     u->sink_put_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_PUT], PA_HOOK_NORMAL,
 248                                        (pa_hook_cb_t) sink_put_hook_callback, u);
 249
 250     u->profile_available_changed_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_CARD_PROFILE_AVAILABLE_CHANGED],
 251                                                         PA_HOOK_NORMAL, (pa_hook_cb_t) profile_available_hook_callback, u);
 252
 253     handle_all_profiles(m->core);
 254
 255     pa_modargs_free(ma);
 256     return 0;
 257
 258 fail:
 259     pa_modargs_free(ma);
 260     return -1;
 261 }
 262
 263 void pa__done(pa_module *m) {
 264     struct userdata *u;
 265
 266     pa_assert(m);
 267
 268     if (!(u = m->userdata))
 269         return;
 270
 271     if (u->source_put_slot)
 272         pa_hook_slot_free(u->source_put_slot);
 273
 274     if (u->sink_put_slot)
 275         pa_hook_slot_free(u->sink_put_slot);
 276
 277     if (u->profile_available_changed_slot)
 278         pa_hook_slot_free(u->profile_available_changed_slot);
 279
 280     pa_xfree(u);
 281 }