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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "device/bluetooth/bluetooth_audio_sink_chromeos.h"
#include <unistd.h>
#include <algorithm>
#include <sstream>
#include <string>
#include <vector>
#include "base/debug/stack_trace.h"
#include "base/files/file_util.h"
#include "base/logging.h"
#include "dbus/message.h"
#include "device/bluetooth/bluetooth_adapter_chromeos.h"
#include "device/bluetooth/dbus/bluez_dbus_manager.h"
using dbus::ObjectPath;
using device::BluetoothAudioSink;
namespace {
// TODO(mcchou): Add the constant to dbus/service_constants.h.
const char kBluetoothAudioSinkServicePath[] = "/org/chromium/AudioSink";
const int kInvalidFd = -1;
const uint16_t kInvalidReadMtu = 0;
const uint16_t kInvalidWriteMtu = 0;
ObjectPath GenerateEndpointPath() {
static unsigned int sequence_number = 0;
++sequence_number;
std::stringstream path;
path << kBluetoothAudioSinkServicePath << "/endpoint" << sequence_number;
return ObjectPath(path.str());
}
std::string StateToString(const BluetoothAudioSink::State& state) {
switch (state) {
case BluetoothAudioSink::STATE_INVALID:
return "invalid";
case BluetoothAudioSink::STATE_DISCONNECTED:
return "disconnected";
case BluetoothAudioSink::STATE_IDLE:
return "idle";
case BluetoothAudioSink::STATE_PENDING:
return "pending";
case BluetoothAudioSink::STATE_ACTIVE:
return "active";
default:
return "unknown";
}
}
std::string ErrorCodeToString(const BluetoothAudioSink::ErrorCode& error_code) {
switch (error_code) {
case BluetoothAudioSink::ERROR_UNSUPPORTED_PLATFORM:
return "unsupported platform";
case BluetoothAudioSink::ERROR_INVALID_ADAPTER:
return "invalid adapter";
case BluetoothAudioSink::ERROR_NOT_REGISTERED:
return "not registered";
case BluetoothAudioSink::ERROR_NOT_UNREGISTERED:
return "not unregistered";
default:
return "unknown";
}
}
// A dummy error callback for calling Unregister() in destructor.
void UnregisterErrorCallback(
device::BluetoothAudioSink::ErrorCode error_code) {
VLOG(1) << "UnregisterErrorCallback - " << ErrorCodeToString(error_code)
<< "(" << error_code << ")";
}
} // namespace
namespace chromeos {
BluetoothAudioSinkChromeOS::BluetoothAudioSinkChromeOS(
scoped_refptr<device::BluetoothAdapter> adapter)
: state_(BluetoothAudioSink::STATE_INVALID),
volume_(BluetoothAudioSink::kInvalidVolume),
read_mtu_(kInvalidReadMtu),
write_mtu_(kInvalidWriteMtu),
read_has_failed_(false),
adapter_(adapter),
weak_ptr_factory_(this) {
VLOG(1) << "BluetoothAudioSinkChromeOS created";
CHECK(adapter_.get());
CHECK(adapter_->IsPresent());
CHECK(bluez::BluezDBusManager::IsInitialized());
adapter_->AddObserver(this);
bluez::BluetoothMediaClient* media =
bluez::BluezDBusManager::Get()->GetBluetoothMediaClient();
CHECK(media);
media->AddObserver(this);
bluez::BluetoothMediaTransportClient* transport =
bluez::BluezDBusManager::Get()->GetBluetoothMediaTransportClient();
CHECK(transport);
transport->AddObserver(this);
StateChanged(device::BluetoothAudioSink::STATE_DISCONNECTED);
}
BluetoothAudioSinkChromeOS::~BluetoothAudioSinkChromeOS() {
VLOG(1) << "BluetoothAudioSinkChromeOS destroyed";
DCHECK(adapter_.get());
if (state_ != BluetoothAudioSink::STATE_INVALID && media_endpoint_.get()) {
Unregister(base::Bind(&base::DoNothing),
base::Bind(&UnregisterErrorCallback));
}
adapter_->RemoveObserver(this);
bluez::BluetoothMediaClient* media =
bluez::BluezDBusManager::Get()->GetBluetoothMediaClient();
CHECK(media);
media->RemoveObserver(this);
bluez::BluetoothMediaTransportClient* transport =
bluez::BluezDBusManager::Get()->GetBluetoothMediaTransportClient();
CHECK(transport);
transport->RemoveObserver(this);
}
void BluetoothAudioSinkChromeOS::Unregister(
const base::Closure& callback,
const device::BluetoothAudioSink::ErrorCallback& error_callback) {
VLOG(1) << "Unregister";
if (!bluez::BluezDBusManager::IsInitialized())
error_callback.Run(BluetoothAudioSink::ERROR_NOT_UNREGISTERED);
bluez::BluetoothMediaClient* media =
bluez::BluezDBusManager::Get()->GetBluetoothMediaClient();
CHECK(media);
media->UnregisterEndpoint(
media_path_,
endpoint_path_,
base::Bind(&BluetoothAudioSinkChromeOS::OnUnregisterSucceeded,
weak_ptr_factory_.GetWeakPtr(), callback),
base::Bind(&BluetoothAudioSinkChromeOS::OnUnregisterFailed,
weak_ptr_factory_.GetWeakPtr(), error_callback));
}
void BluetoothAudioSinkChromeOS::AddObserver(
BluetoothAudioSink::Observer* observer) {
CHECK(observer);
observers_.AddObserver(observer);
}
void BluetoothAudioSinkChromeOS::RemoveObserver(
BluetoothAudioSink::Observer* observer) {
CHECK(observer);
observers_.RemoveObserver(observer);
}
BluetoothAudioSink::State BluetoothAudioSinkChromeOS::GetState() const {
return state_;
}
uint16_t BluetoothAudioSinkChromeOS::GetVolume() const {
return volume_;
}
void BluetoothAudioSinkChromeOS::Register(
const BluetoothAudioSink::Options& options,
const base::Closure& callback,
const BluetoothAudioSink::ErrorCallback& error_callback) {
VLOG(1) << "Register";
DCHECK(adapter_.get());
DCHECK_EQ(state_, BluetoothAudioSink::STATE_DISCONNECTED);
// Gets system bus.
dbus::Bus* system_bus = bluez::BluezDBusManager::Get()->GetSystemBus();
// Creates a Media Endpoint with newly-generated path.
endpoint_path_ = GenerateEndpointPath();
media_endpoint_.reset(bluez::BluetoothMediaEndpointServiceProvider::Create(
system_bus, endpoint_path_, this));
DCHECK(media_endpoint_.get());
// Creates endpoint properties with |options|.
options_ = options;
bluez::BluetoothMediaClient::EndpointProperties endpoint_properties;
endpoint_properties.uuid =
bluez::BluetoothMediaClient::kBluetoothAudioSinkUUID;
endpoint_properties.codec = options_.codec;
endpoint_properties.capabilities = options_.capabilities;
media_path_ = static_cast<BluetoothAdapterChromeOS*>(
adapter_.get())->object_path();
bluez::BluetoothMediaClient* media =
bluez::BluezDBusManager::Get()->GetBluetoothMediaClient();
CHECK(media);
media->RegisterEndpoint(
media_path_,
endpoint_path_,
endpoint_properties,
base::Bind(&BluetoothAudioSinkChromeOS::OnRegisterSucceeded,
weak_ptr_factory_.GetWeakPtr(), callback),
base::Bind(&BluetoothAudioSinkChromeOS::OnRegisterFailed,
weak_ptr_factory_.GetWeakPtr(), error_callback));
}
bluez::BluetoothMediaEndpointServiceProvider*
BluetoothAudioSinkChromeOS::GetEndpointServiceProvider() {
return media_endpoint_.get();
}
void BluetoothAudioSinkChromeOS::AdapterPresentChanged(
device::BluetoothAdapter* adapter, bool present) {
VLOG(1) << "AdapterPresentChanged: " << present;
if (adapter != adapter_.get())
return;
if (adapter->IsPresent()) {
StateChanged(BluetoothAudioSink::STATE_DISCONNECTED);
} else {
adapter_->RemoveObserver(this);
StateChanged(BluetoothAudioSink::STATE_INVALID);
}
}
void BluetoothAudioSinkChromeOS::AdapterPoweredChanged(
device::BluetoothAdapter* adapter, bool powered) {
VLOG(1) << "AdapterPoweredChanged: " << powered;
if (adapter != adapter_.get())
return;
// Regardless of the new powered state, |state_| goes to STATE_DISCONNECTED.
// If false, the transport is closed, but the endpoint is still valid for use.
// If true, the previous transport has been torn down, so the |state_| has to
// be disconnected before SetConfigruation is called.
if (state_ != BluetoothAudioSink::STATE_INVALID)
StateChanged(BluetoothAudioSink::STATE_DISCONNECTED);
}
void BluetoothAudioSinkChromeOS::MediaRemoved(const ObjectPath& object_path) {
if (object_path == media_path_) {
VLOG(1) << "MediaRemoved: " << object_path.value();
StateChanged(BluetoothAudioSink::STATE_INVALID);
}
}
void BluetoothAudioSinkChromeOS::MediaTransportRemoved(
const ObjectPath& object_path) {
// Whenever powered of |adapter_| turns false while present stays true, media
// transport object should be removed accordingly, and the state should be
// changed to STATE_DISCONNECTED.
if (object_path == transport_path_) {
VLOG(1) << "MediaTransportRemoved: " << object_path.value();
StateChanged(BluetoothAudioSink::STATE_DISCONNECTED);
}
}
void BluetoothAudioSinkChromeOS::MediaTransportPropertyChanged(
const ObjectPath& object_path,
const std::string& property_name) {
if (object_path != transport_path_)
return;
VLOG(1) << "MediaTransportPropertyChanged: " << property_name;
// Retrieves the property set of the transport object with |object_path|.
bluez::BluetoothMediaTransportClient::Properties* properties =
bluez::BluezDBusManager::Get()
->GetBluetoothMediaTransportClient()
->GetProperties(object_path);
// Dispatches a property changed event to the corresponding handler.
if (property_name == properties->state.name()) {
if (properties->state.value() ==
bluez::BluetoothMediaTransportClient::kStateIdle) {
StateChanged(BluetoothAudioSink::STATE_IDLE);
} else if (properties->state.value() ==
bluez::BluetoothMediaTransportClient::kStatePending) {
StateChanged(BluetoothAudioSink::STATE_PENDING);
} else if (properties->state.value() ==
bluez::BluetoothMediaTransportClient::kStateActive) {
StateChanged(BluetoothAudioSink::STATE_ACTIVE);
}
} else if (property_name == properties->volume.name()) {
VolumeChanged(properties->volume.value());
}
}
void BluetoothAudioSinkChromeOS::SetConfiguration(
const ObjectPath& transport_path,
const TransportProperties& properties) {
VLOG(1) << "SetConfiguration";
transport_path_ = transport_path;
// The initial state for a connection should be "idle".
if (properties.state != bluez::BluetoothMediaTransportClient::kStateIdle) {
VLOG(1) << "SetConfiugration - unexpected state :" << properties.state;
return;
}
// Updates |volume_| if the volume level is provided in |properties|.
if (properties.volume.get()) {
VolumeChanged(*properties.volume);
}
StateChanged(BluetoothAudioSink::STATE_IDLE);
}
void BluetoothAudioSinkChromeOS::SelectConfiguration(
const std::vector<uint8_t>& capabilities,
const SelectConfigurationCallback& callback) {
VLOG(1) << "SelectConfiguration";
callback.Run(options_.capabilities);
}
void BluetoothAudioSinkChromeOS::ClearConfiguration(
const ObjectPath& transport_path) {
if (transport_path != transport_path_)
return;
VLOG(1) << "ClearConfiguration";
StateChanged(BluetoothAudioSink::STATE_DISCONNECTED);
}
void BluetoothAudioSinkChromeOS::Released() {
VLOG(1) << "Released";
StateChanged(BluetoothAudioSink::STATE_INVALID);
}
void BluetoothAudioSinkChromeOS::OnFileCanReadWithoutBlocking(int fd) {
ReadFromFile();
}
void BluetoothAudioSinkChromeOS::OnFileCanWriteWithoutBlocking(int fd) {
// Do nothing for now.
}
void BluetoothAudioSinkChromeOS::AcquireFD() {
VLOG(1) << "AcquireFD - transport path: " << transport_path_.value();
read_has_failed_ = false;
bluez::BluezDBusManager::Get()->GetBluetoothMediaTransportClient()->Acquire(
transport_path_,
base::Bind(&BluetoothAudioSinkChromeOS::OnAcquireSucceeded,
weak_ptr_factory_.GetWeakPtr()),
base::Bind(&BluetoothAudioSinkChromeOS::OnAcquireFailed,
weak_ptr_factory_.GetWeakPtr()));
}
void BluetoothAudioSinkChromeOS::WatchFD() {
CHECK(file_.get() && file_->IsValid());
VLOG(1) << "WatchFD - file: " << file_->GetPlatformFile()
<< ", file validity: " << file_->IsValid();
base::MessageLoopForIO::current()->WatchFileDescriptor(
file_->GetPlatformFile(), true, base::MessageLoopForIO::WATCH_READ,
&fd_read_watcher_, this);
}
void BluetoothAudioSinkChromeOS::StopWatchingFD() {
if (!file_.get()) {
VLOG(1) << "StopWatchingFD - skip";
return;
}
bool stopped = fd_read_watcher_.StopWatchingFileDescriptor();
VLOG(1) << "StopWatchingFD - watch stopped: " << stopped;
CHECK(stopped);
read_mtu_ = kInvalidReadMtu;
write_mtu_ = kInvalidWriteMtu;
file_.reset(); // This will close the file descriptor.
}
void BluetoothAudioSinkChromeOS::ReadFromFile() {
DCHECK(file_.get() && file_->IsValid());
DCHECK(data_.get());
int size = file_->ReadAtCurrentPosNoBestEffort(data_.get(), read_mtu_);
if (size == -1) {
// To reduce the number of logs, log only once for multiple failures.
if (!read_has_failed_) {
VLOG(1) << "ReadFromFile - failed";
read_has_failed_ = true;
}
return;
}
VLOG(1) << "ReadFromFile - read " << size << " bytes";
FOR_EACH_OBSERVER(
BluetoothAudioSink::Observer, observers_,
BluetoothAudioSinkDataAvailable(this, data_.get(), size, read_mtu_));
}
void BluetoothAudioSinkChromeOS::StateChanged(
BluetoothAudioSink::State state) {
if (state == state_)
return;
VLOG(1) << "StateChanged - state: " << StateToString(state);
switch (state) {
case BluetoothAudioSink::STATE_INVALID:
ResetMedia();
ResetEndpoint();
case BluetoothAudioSink::STATE_DISCONNECTED:
ResetTransport();
break;
case BluetoothAudioSink::STATE_IDLE:
StopWatchingFD();
break;
case BluetoothAudioSink::STATE_PENDING:
AcquireFD();
break;
case BluetoothAudioSink::STATE_ACTIVE:
WatchFD();
break;
default:
break;
}
state_ = state;
FOR_EACH_OBSERVER(BluetoothAudioSink::Observer, observers_,
BluetoothAudioSinkStateChanged(this, state_));
}
void BluetoothAudioSinkChromeOS::VolumeChanged(uint16_t volume) {
if (volume == volume_)
return;
VLOG(1) << "VolumeChanged: " << volume;
volume_ = std::min(volume, BluetoothAudioSink::kInvalidVolume);
FOR_EACH_OBSERVER(BluetoothAudioSink::Observer, observers_,
BluetoothAudioSinkVolumeChanged(this, volume_));
}
void BluetoothAudioSinkChromeOS::OnRegisterSucceeded(
const base::Closure& callback) {
DCHECK(media_endpoint_.get());
VLOG(1) << "OnRegisterSucceeded";
StateChanged(BluetoothAudioSink::STATE_DISCONNECTED);
callback.Run();
}
void BluetoothAudioSinkChromeOS::OnRegisterFailed(
const BluetoothAudioSink::ErrorCallback& error_callback,
const std::string& error_name,
const std::string& error_message) {
VLOG(1) << "OnRegisterFailed - error name: " << error_name
<< ", error message: " << error_message;
ResetEndpoint();
error_callback.Run(BluetoothAudioSink::ERROR_NOT_REGISTERED);
}
void BluetoothAudioSinkChromeOS::OnUnregisterSucceeded(
const base::Closure& callback) {
VLOG(1) << "Unregistered - endpoint: " << endpoint_path_.value();
// Once the state becomes STATE_INVALID, media, media transport and media
// endpoint will be reset.
StateChanged(BluetoothAudioSink::STATE_INVALID);
callback.Run();
}
void BluetoothAudioSinkChromeOS::OnUnregisterFailed(
const device::BluetoothAudioSink::ErrorCallback& error_callback,
const std::string& error_name,
const std::string& error_message) {
VLOG(1) << "OnUnregisterFailed - error name: " << error_name
<< ", error message: " << error_message;
error_callback.Run(BluetoothAudioSink::ERROR_NOT_UNREGISTERED);
}
void BluetoothAudioSinkChromeOS::OnAcquireSucceeded(
dbus::FileDescriptor* fd,
const uint16_t read_mtu,
const uint16_t write_mtu) {
CHECK(fd);
fd->CheckValidity();
CHECK(fd->is_valid() && fd->value() != kInvalidFd);
CHECK_GT(read_mtu, kInvalidReadMtu);
CHECK_GT(write_mtu, kInvalidWriteMtu);
// Avoids unnecessary memory reallocation if read MTU doesn't change.
if (read_mtu != read_mtu_) {
read_mtu_ = read_mtu;
data_.reset(new char[read_mtu_]);
VLOG(1) << "OnAcquireSucceeded - allocate " << read_mtu_
<< " bytes of memory";
}
write_mtu_ = write_mtu;
// Avoids closing the same file descriptor caused by reassignment.
if (!file_.get() || file_->GetPlatformFile() != fd->value()) {
// Takes ownership of the file descriptor.
file_.reset(new base::File(fd->TakeValue()));
DCHECK(file_->IsValid());
VLOG(1) << "OnAcquireSucceeded - update file";
}
VLOG(1) << "OnAcquireSucceeded - file: " << file_->GetPlatformFile()
<< ", read MTU: " << read_mtu_ << ", write MTU: " << write_mtu_;
}
void BluetoothAudioSinkChromeOS::OnAcquireFailed(
const std::string& error_name,
const std::string& error_message) {
VLOG(1) << "OnAcquireFailed - error name: " << error_name
<< ", error message: " << error_message;
}
void BluetoothAudioSinkChromeOS::OnReleaseFDSucceeded() {
VLOG(1) << "OnReleaseFDSucceeded";
}
void BluetoothAudioSinkChromeOS::OnReleaseFDFailed(
const std::string& error_name,
const std::string& error_message) {
VLOG(1) << "OnReleaseFDFailed - error name: " << error_name
<< ", error message: " << error_message;
}
void BluetoothAudioSinkChromeOS::ResetMedia() {
VLOG(1) << "ResetMedia";
media_path_ = dbus::ObjectPath("");
}
void BluetoothAudioSinkChromeOS::ResetTransport() {
if (!transport_path_.IsValid()) {
VLOG(1) << "ResetTransport - skip";
return;
}
VLOG(1) << "ResetTransport - clean-up";
VolumeChanged(BluetoothAudioSink::kInvalidVolume);
transport_path_ = dbus::ObjectPath("");
read_mtu_ = kInvalidReadMtu;
write_mtu_ = kInvalidWriteMtu;
file_.reset();
}
void BluetoothAudioSinkChromeOS::ResetEndpoint() {
VLOG(1) << "ResetEndpoint";
endpoint_path_ = ObjectPath("");
media_endpoint_ = nullptr;
}
} // namespace chromeos
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