gecko/dom/bluetooth/BluetoothInterface.cpp
Thomas Zimmermann 196e1368f7 Bug 1134821: Detect default Bluetooth backend, r=shuang
This patch adds code to select the default Bluetooth backend from a
list of supported ones, by detecting the backend's availability. Some
devices are missing bluetoothd support. With the patch, bluetoothd
can be the default backend, but unsupportive devices fall back to in-
Gecko Bluedroid.
2015-03-11 10:11:48 +01:00

180 lines
3.8 KiB
C++

/* -*- Mode: c++; c-basic-offset: 3; indent-tabs-mode: nil; tab-width: 40 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "BluetoothInterface.h"
#if ANDROID_VERSION >= 17
#include <cutils/properties.h>
#endif
#ifdef MOZ_B2G_BT_BLUEDROID
#include "BluetoothHALInterface.h"
#endif
#ifdef MOZ_B2G_BT_DAEMON
#include "BluetoothDaemonInterface.h"
#endif
BEGIN_BLUETOOTH_NAMESPACE
//
// Socket Interface
//
BluetoothSocketInterface::~BluetoothSocketInterface()
{ }
//
// Handsfree Interface
//
// Notification handling
//
BluetoothHandsfreeNotificationHandler::
~BluetoothHandsfreeNotificationHandler()
{ }
// Interface
//
BluetoothHandsfreeInterface::BluetoothHandsfreeInterface()
{ }
BluetoothHandsfreeInterface::~BluetoothHandsfreeInterface()
{ }
//
// Bluetooth Advanced Audio Interface
//
// Notification handling
//
BluetoothA2dpNotificationHandler::~BluetoothA2dpNotificationHandler()
{ }
// Interface
//
BluetoothA2dpInterface::BluetoothA2dpInterface()
{ }
BluetoothA2dpInterface::~BluetoothA2dpInterface()
{ }
//
// Bluetooth AVRCP Interface
//
// Notification handling
//
BluetoothAvrcpNotificationHandler::~BluetoothAvrcpNotificationHandler()
{ }
// Interface
//
BluetoothAvrcpInterface::BluetoothAvrcpInterface()
{ }
BluetoothAvrcpInterface::~BluetoothAvrcpInterface()
{ }
// Notification handling
//
BluetoothNotificationHandler::~BluetoothNotificationHandler()
{ }
// Interface
//
BluetoothInterface*
BluetoothInterface::GetInstance()
{
#if ANDROID_VERSION >= 17
/* We pick a default backend from the available ones. The options are
* ordered by preference. If a backend is supported but not available
* on the current system, we pick the next one. The selected default
* can be overriden manually by storing the respective string in the
* system property 'ro.moz.bluetooth.backend'.
*/
static const char* const sDefaultBackend[] = {
#ifdef MOZ_B2G_BT_DAEMON
"bluetoothd",
#endif
#ifdef MOZ_B2G_BT_BLUEDROID
"bluedroid",
#endif
nullptr // no default backend; must be final element in array
};
const char* defaultBackend;
for (size_t i = 0; i < MOZ_ARRAY_LENGTH(sDefaultBackend); ++i) {
/* select current backend */
defaultBackend = sDefaultBackend[i];
if (defaultBackend) {
if (!strcmp(defaultBackend, "bluetoothd") &&
access("/init.bluetooth.rc", F_OK) == -1) {
continue; /* bluetoothd not available */
}
}
break;
}
char value[PROPERTY_VALUE_MAX];
int len;
len = property_get("ro.moz.bluetooth.backend", value, defaultBackend);
if (len < 0) {
BT_WARNING("No Bluetooth backend available.");
return nullptr;
}
const nsDependentCString backend(value, len);
/* Here's where we decide which implementation to use. Currently
* there is only Bluedroid and the Bluetooth daemon, but others are
* possible. Having multiple interfaces built-in and selecting the
* correct one at runtime is also an option.
*/
#ifdef MOZ_B2G_BT_BLUEDROID
if (backend.LowerCaseEqualsLiteral("bluedroid")) {
return BluetoothHALInterface::GetInstance();
} else
#endif
#ifdef MOZ_B2G_BT_DAEMON
if (backend.LowerCaseEqualsLiteral("bluetoothd")) {
return BluetoothDaemonInterface::GetInstance();
} else
#endif
{
BT_WARNING("Bluetooth backend '%s' is unknown or not available.",
backend.get());
}
return nullptr;
#else
/* Anything that's not Android 4.2 or later uses BlueZ instead. The
* code should actually never reach this point.
*/
BT_WARNING("No Bluetooth backend available for your system.");
return nullptr;
#endif
}
BluetoothInterface::BluetoothInterface()
{ }
BluetoothInterface::~BluetoothInterface()
{ }
END_BLUETOOTH_NAMESPACE