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service.cc
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service.cc
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// Copyright 2017 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 "services/audio/service.h"
#include <utility>
#include "base/logging.h"
#include "base/macros.h"
#include "base/single_thread_task_runner.h"
#include "base/system_monitor/system_monitor.h"
#include "base/time/default_tick_clock.h"
#include "base/trace_event/trace_event.h"
#include "media/audio/audio_manager.h"
#include "services/audio/debug_recording.h"
#include "services/audio/device_notifier.h"
#include "services/audio/service_metrics.h"
#include "services/audio/system_info.h"
#include "services/service_manager/public/cpp/service_context.h"
#include "services/service_manager/public/cpp/service_context_ref.h"
#if defined(OS_MACOSX)
#include "media/audio/mac/audio_device_listener_mac.h"
#endif
namespace audio {
Service::Service(std::unique_ptr<AudioManagerAccessor> audio_manager_accessor,
base::TimeDelta quit_timeout,
bool device_notifier_enabled,
std::unique_ptr<service_manager::BinderRegistry> registry)
: quit_timeout_(quit_timeout),
audio_manager_accessor_(std::move(audio_manager_accessor)),
device_notifier_enabled_(device_notifier_enabled),
registry_(std::move(registry)) {
DCHECK(audio_manager_accessor_);
if (!device_notifier_enabled)
InitializeDeviceMonitor();
}
Service::~Service() {
DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
TRACE_EVENT0("audio", "audio::Service::~Service");
metrics_.reset();
// |ref_factory_| may reentrantly call its |quit_closure| when we reset the
// members below. Destroy it ahead of time to prevent this.
ref_factory_.reset();
// Stop all streams cleanly before shutting down the audio manager.
stream_factory_.reset();
// Reset |debug_recording_| to disable debug recording before AudioManager
// shutdown.
debug_recording_.reset();
audio_manager_accessor_->Shutdown();
}
void Service::OnStart() {
DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
TRACE_EVENT0("audio", "audio::Service::OnStart")
// This will pre-create AudioManager if AudioManagerAccessor owns it.
CHECK(audio_manager_accessor_->GetAudioManager());
metrics_ =
std::make_unique<ServiceMetrics>(base::DefaultTickClock::GetInstance());
ref_factory_ = std::make_unique<service_manager::ServiceContextRefFactory>(
base::BindRepeating(&Service::MaybeRequestQuitDelayed,
base::Unretained(this)));
registry_->AddInterface<mojom::SystemInfo>(base::BindRepeating(
&Service::BindSystemInfoRequest, base::Unretained(this)));
registry_->AddInterface<mojom::DebugRecording>(base::BindRepeating(
&Service::BindDebugRecordingRequest, base::Unretained(this)));
registry_->AddInterface<mojom::StreamFactory>(base::BindRepeating(
&Service::BindStreamFactoryRequest, base::Unretained(this)));
if (device_notifier_enabled_) {
registry_->AddInterface<mojom::DeviceNotifier>(base::BindRepeating(
&Service::BindDeviceNotifierRequest, base::Unretained(this)));
}
}
void Service::OnBindInterface(
const service_manager::BindSourceInfo& source_info,
const std::string& interface_name,
mojo::ScopedMessagePipeHandle interface_pipe) {
DCHECK(ref_factory_);
DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
TRACE_EVENT1("audio", "audio::Service::OnBindInterface", "interface",
interface_name);
if (ref_factory_->HasNoRefs())
metrics_->HasConnections();
registry_->BindInterface(interface_name, std::move(interface_pipe));
DCHECK(!ref_factory_->HasNoRefs());
quit_timer_.AbandonAndStop();
}
bool Service::OnServiceManagerConnectionLost() {
DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
return true;
}
void Service::SetQuitClosureForTesting(base::RepeatingClosure quit_closure) {
DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
quit_closure_ = std::move(quit_closure);
}
void Service::BindSystemInfoRequest(mojom::SystemInfoRequest request) {
DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
DCHECK(ref_factory_);
if (!system_info_) {
system_info_ = std::make_unique<SystemInfo>(
audio_manager_accessor_->GetAudioManager());
}
system_info_->Bind(
std::move(request),
TracedServiceRef(ref_factory_->CreateRef(), "audio::SystemInfo Binding"));
}
void Service::BindDebugRecordingRequest(mojom::DebugRecordingRequest request) {
DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
DCHECK(ref_factory_);
// Reuse ref if there is an ongoing debug session that will be overriden, to
// avoid MaybeRequestQuitDelayed() call.
TracedServiceRef service_ref;
if (debug_recording_) {
service_ref = debug_recording_->ReleaseServiceRef();
} else {
service_ref = TracedServiceRef(ref_factory_->CreateRef(),
"audio::DebugRecording Binding");
}
// Accept only one bind request at a time. Old request is overwritten.
// |debug_recording_| must be reset first to disable debug recording, and then
// create a new DebugRecording instance to enable debug recording.
debug_recording_.reset();
debug_recording_ = std::make_unique<DebugRecording>(
std::move(request), audio_manager_accessor_->GetAudioManager(),
std::move(service_ref));
}
void Service::BindStreamFactoryRequest(mojom::StreamFactoryRequest request) {
DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
DCHECK(ref_factory_);
if (!stream_factory_)
stream_factory_.emplace(audio_manager_accessor_->GetAudioManager());
stream_factory_->Bind(std::move(request),
TracedServiceRef(ref_factory_->CreateRef(),
"audio::StreamFactory Binding"));
}
void Service::BindDeviceNotifierRequest(mojom::DeviceNotifierRequest request) {
DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
DCHECK(ref_factory_);
DCHECK(device_notifier_enabled_);
if (!system_monitor_) {
CHECK(!base::SystemMonitor::Get());
system_monitor_ = std::make_unique<base::SystemMonitor>();
}
InitializeDeviceMonitor();
if (!device_notifier_)
device_notifier_ = std::make_unique<DeviceNotifier>();
device_notifier_->Bind(std::move(request),
TracedServiceRef(ref_factory_->CreateRef(),
"audio::DeviceNotifier Binding"));
}
void Service::MaybeRequestQuitDelayed() {
DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
metrics_->HasNoConnections();
if (quit_timeout_ <= base::TimeDelta())
return;
quit_timer_.Start(FROM_HERE, quit_timeout_, this, &Service::MaybeRequestQuit);
}
void Service::MaybeRequestQuit() {
DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
DCHECK(ref_factory_ && ref_factory_->HasNoRefs() &&
quit_timeout_ > base::TimeDelta());
TRACE_EVENT0("audio", "audio::Service::MaybeRequestQuit");
context()->CreateQuitClosure().Run();
if (!quit_closure_.is_null())
quit_closure_.Run();
}
void Service::InitializeDeviceMonitor() {
#if defined(OS_MACOSX)
if (audio_device_listener_mac_)
return;
TRACE_EVENT0("audio", "audio::Service::InitializeDeviceMonitor");
audio_device_listener_mac_ = std::make_unique<media::AudioDeviceListenerMac>(
base::BindRepeating([] {
if (base::SystemMonitor::Get()) {
base::SystemMonitor::Get()->ProcessDevicesChanged(
base::SystemMonitor::DEVTYPE_AUDIO);
}
}),
true /* monitor_default_input */, true /* monitor_addition_removal */,
true /* monitor_sources */);
#endif
}
} // namespace audio