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     /* TODO: remove a2dp when we decide to remove support for BlueZ 4 */
 176     if (pa_streq(profile->name, "hsp") || pa_streq(profile->name, "a2dp") || pa_streq(profile->name, "a2dp_sink"))
 177         return PA_HOOK_OK;
 178
 179     is_active_profile = card->active_profile == profile;
 180
 181     if (profile->available == PA_AVAILABLE_YES) {
 182         if (is_active_profile)
 183             return PA_HOOK_OK;
 184
 185         if (card->active_profile->available == PA_AVAILABLE_YES && card->active_profile->priority >= profile->priority)
 186             return PA_HOOK_OK;
 187
 188         selected_profile = profile;
 189     } else {
 190         if (!is_active_profile)
 191             return PA_HOOK_OK;
 192
 193         pa_assert_se((selected_profile = find_best_profile(card)));
 194
 195         if (selected_profile == card->active_profile)
 196             return PA_HOOK_OK;
 197     }
 198
 199     pa_log_debug("Setting card '%s' to profile '%s'", card->name, selected_profile->name);
 200
 201     if (pa_card_set_profile(card, selected_profile, false) != 0)
 202         pa_log_warn("Could not set profile '%s'", selected_profile->name);
 203
 204     return PA_HOOK_OK;
 205 }
 206
 207 static void handle_all_profiles(pa_core *core) {
 208     pa_card *card;
 209     uint32_t state;
 210
 211     PA_IDXSET_FOREACH(card, core->cards, state) {
 212         pa_card_profile *profile;
 213         void *state2;
 214
 215         PA_HASHMAP_FOREACH(profile, card->profiles, state2)
 216             profile_available_hook_callback(core, profile, NULL);
 217     }
 218 }
 219
 220 int pa__init(pa_module *m) {
 221     pa_modargs *ma;
 222     struct userdata *u;
 223
 224     pa_assert(m);
 225
 226     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 227         pa_log_error("Failed to parse module arguments");
 228         return -1;
 229     }
 230
 231     m->userdata = u = pa_xnew0(struct userdata, 1);
 232
 233     u->enable_a2dp_source = true;
 234     if (pa_modargs_get_value_boolean(ma, "a2dp_source", &u->enable_a2dp_source) < 0) {
 235         pa_log("Failed to parse a2dp_source argument.");
 236         goto fail;
 237     }
 238
 239     u->enable_hfgw = true;
 240     if (pa_modargs_get_value_boolean(ma, "hfgw", &u->enable_hfgw) < 0) {
 241         pa_log("Failed to parse hfgw argument.");
 242         goto fail;
 243     }
 244
 245     u->source_put_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_PUT], PA_HOOK_NORMAL,
 246                                          (pa_hook_cb_t) source_put_hook_callback, u);
 247
 248     u->sink_put_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_PUT], PA_HOOK_NORMAL,
 249                                        (pa_hook_cb_t) sink_put_hook_callback, u);
 250
 251     u->profile_available_changed_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_CARD_PROFILE_AVAILABLE_CHANGED],
 252                                                         PA_HOOK_NORMAL, (pa_hook_cb_t) profile_available_hook_callback, u);
 253
 254     handle_all_profiles(m->core);
 255
 256     pa_modargs_free(ma);
 257     return 0;
 258
 259 fail:
 260     pa_modargs_free(ma);
 261     return -1;
 262 }
 263
 264 void pa__done(pa_module *m) {
 265     struct userdata *u;
 266
 267     pa_assert(m);
 268
 269     if (!(u = m->userdata))
 270         return;
 271
 272     if (u->source_put_slot)
 273         pa_hook_slot_free(u->source_put_slot);
 274
 275     if (u->sink_put_slot)
 276         pa_hook_slot_free(u->sink_put_slot);
 277
 278     if (u->profile_available_changed_slot)
 279         pa_hook_slot_free(u->profile_available_changed_slot);
 280
 281     pa_xfree(u);
 282 }