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
  45 static const char* const valid_modargs[] = {
  46     "a2dp_source",
  47     NULL
  48 };
  49
  50 struct userdata {
  51     bool enable_a2dp_source;
  52     pa_hook_slot *source_put_slot;
  53 };
  54
  55 /* When a source is created, loopback it to default sink */
  56 static pa_hook_result_t source_put_hook_callback(pa_core *c, pa_source *source, void *userdata) {
  57     struct userdata *u = userdata;
  58     const char *s;
  59     const char *role;
  60     char *args;
  61
  62     pa_assert(c);
  63     pa_assert(source);
  64
  65     /* Only consider bluetooth sinks and sources */
  66     s = pa_proplist_gets(source->proplist, PA_PROP_DEVICE_BUS);
  67     if (!s)
  68         return PA_HOOK_OK;
  69
  70     if (!pa_streq(s, "bluetooth"))
  71         return PA_HOOK_OK;
  72
  73     s = pa_proplist_gets(source->proplist, "bluetooth.protocol");
  74     if (!s)
  75         return PA_HOOK_OK;
  76
  77     if (u->enable_a2dp_source && pa_streq(s, "a2dp_source")) /* A2DP profile (we're doing sink role) */
  78         role = "music";
  79     else {
  80         pa_log_debug("Profile %s cannot be selected for loopback", s);
  81         return PA_HOOK_OK;
  82     }
  83
  84     /* Load module-loopback */
  85     args = pa_sprintf_malloc("source=\"%s\" source_dont_move=\"true\" sink_input_properties=\"media.role=%s\"", source->name, role);
  86     (void) pa_module_load(c, "module-loopback", args);
  87     pa_xfree(args);
  88
  89     return PA_HOOK_OK;
  90 }
  91
  92 int pa__init(pa_module *m) {
  93     pa_modargs *ma;
  94     struct userdata *u;
  95
  96     pa_assert(m);
  97
  98     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
  99         pa_log_error("Failed to parse module arguments");
 100         return -1;
 101     }
 102
 103     m->userdata = u = pa_xnew(struct userdata, 1);
 104
 105     u->enable_a2dp_source = TRUE;
 106     if (pa_modargs_get_value_boolean(ma, "a2dp_source", &u->enable_a2dp_source) < 0) {
 107         pa_log("Failed to parse a2dp_source argument.");
 108         goto fail;
 109     }
 110
 111     u->source_put_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_PUT], PA_HOOK_NORMAL, (pa_hook_cb_t) source_put_hook_callback, u);
 112
 113     pa_modargs_free(ma);
 114     return 0;
 115
 116 fail:
 117     pa_modargs_free(ma);
 118     return -1;
 119 }
 120
 121 void pa__done(pa_module *m) {
 122     struct userdata *u;
 123
 124     pa_assert(m);
 125
 126     if (!(u = m->userdata))
 127         return;
 128
 129     if (u->source_put_slot)
 130         pa_hook_slot_free(u->source_put_slot);
 131
 132     pa_xfree(u);
 133 }