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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/public/web/modules/media/audio/audio_device_factory.h"
#include <algorithm>
#include "base/check.h"
#include "base/functional/bind.h"
#include "base/metrics/histogram_macros.h"
#include "base/no_destructor.h"
#include "base/notreached.h"
#include "base/task/thread_pool.h"
#include "base/threading/platform_thread.h"
#include "base/time/time.h"
#include "build/build_config.h"
#include "media/audio/audio_input_device.h"
#include "media/audio/audio_output_device.h"
#include "third_party/blink/public/platform/platform.h"
#include "third_party/blink/public/web/modules/media/audio/audio_input_ipc_factory.h"
#include "third_party/blink/public/web/modules/media/audio/audio_output_ipc_factory.h"
#include "third_party/blink/public/web/web_local_frame.h"
#include "third_party/blink/renderer/modules/media/audio/audio_renderer_mixer_input.h"
#include "third_party/blink/renderer/modules/media/audio/audio_renderer_mixer_manager.h"
#include "third_party/blink/renderer/modules/media/audio/audio_renderer_sink_cache.h"
#include "third_party/blink/renderer/platform/wtf/wtf.h"
namespace blink {
namespace {
// Set when the default factory is overridden.
AudioDeviceFactory* g_factory_override = nullptr;
#if BUILDFLAG(IS_WIN) || BUILDFLAG(IS_MAC) || BUILDFLAG(IS_LINUX)
// Due to driver deadlock issues on Windows (http://crbug/422522) there is a
// chance device authorization response is never received from the browser side.
// In this case we will time out, to avoid renderer hang forever waiting for
// device authorization (http://crbug/615589). This will result in "no audio".
// There are also cases when authorization takes too long on Mac and Linux.
constexpr base::TimeDelta kMaxAuthorizationTimeout = base::Seconds(10);
#else
constexpr base::TimeDelta kMaxAuthorizationTimeout; // No timeout.
#endif
base::TimeDelta GetDefaultAuthTimeout() {
// Set authorization request timeout at 80% of renderer hung timeout,
// but no more than kMaxAuthorizationTimeout.
return std::min(Platform::Current()->GetHungRendererDelay() * 8 / 10,
kMaxAuthorizationTimeout);
}
// Creates an output device in the rendering pipeline, `auth_timeout` is the
// authorization timeout allowed for the underlying AudioOutputDevice instance;
// a timeout of zero means no timeout.
scoped_refptr<media::AudioOutputDevice> NewOutputDevice(
const blink::LocalFrameToken& frame_token,
const media::AudioSinkParameters& params,
base::TimeDelta auth_timeout) {
CHECK(blink::AudioOutputIPCFactory::GetInstance().io_task_runner());
auto device = base::MakeRefCounted<media::AudioOutputDevice>(
blink::AudioOutputIPCFactory::GetInstance().CreateAudioOutputIPC(
frame_token),
blink::AudioOutputIPCFactory::GetInstance().io_task_runner(), params,
auth_timeout);
device->RequestDeviceAuthorization();
return device;
}
// This is where we decide which audio will go to mixers and which one to
// AudioOutputDevice directly.
bool IsMixable(blink::WebAudioDeviceSourceType source_type) {
// Media element must ALWAYS go through mixer.
return source_type == blink::WebAudioDeviceSourceType::kMediaElement;
}
} // namespace
// static
AudioDeviceFactory* AudioDeviceFactory::GetInstance() {
if (g_factory_override) {
return g_factory_override;
}
static base::NoDestructor<AudioDeviceFactory> g_default_factory(
/*override_default=*/false);
return g_default_factory.get();
}
AudioDeviceFactory::AudioDeviceFactory(bool override_default) {
if (override_default) {
DCHECK(!g_factory_override) << "Can't register two factories at once.";
g_factory_override = this;
}
}
AudioDeviceFactory::~AudioDeviceFactory() {
DCHECK_EQ(g_factory_override, this);
g_factory_override = nullptr;
}
// static
media::AudioLatency::Type AudioDeviceFactory::GetSourceLatencyType(
blink::WebAudioDeviceSourceType source) {
switch (source) {
case blink::WebAudioDeviceSourceType::kWebAudioInteractive:
return media::AudioLatency::Type::kInteractive;
case blink::WebAudioDeviceSourceType::kNone:
case blink::WebAudioDeviceSourceType::kWebRtc:
case blink::WebAudioDeviceSourceType::kNonRtcAudioTrack:
case blink::WebAudioDeviceSourceType::kWebAudioBalanced:
return media::AudioLatency::Type::kRtc;
case blink::WebAudioDeviceSourceType::kMediaElement:
case blink::WebAudioDeviceSourceType::kWebAudioPlayback:
return media::AudioLatency::Type::kPlayback;
case blink::WebAudioDeviceSourceType::kWebAudioExact:
return media::AudioLatency::Type::kExactMS;
}
NOTREACHED();
}
scoped_refptr<media::AudioRendererSink>
AudioDeviceFactory::NewAudioRendererSink(
blink::WebAudioDeviceSourceType source_type,
const blink::LocalFrameToken& frame_token,
const media::AudioSinkParameters& params) {
DCHECK(!IsMixable(source_type));
return NewOutputDevice(frame_token, params, GetDefaultAuthTimeout());
}
scoped_refptr<media::SwitchableAudioRendererSink>
AudioDeviceFactory::NewMixableSink(blink::WebAudioDeviceSourceType source_type,
const blink::LocalFrameToken& frame_token,
const blink::FrameToken& main_frame_token,
const media::AudioSinkParameters& params) {
DCHECK(IsMixable(source_type));
DCHECK(IsMainThread()) << __func__ << "() is called on a wrong thread.";
if (!mixer_manager_) {
auto create_sink_cb =
base::BindRepeating([](const LocalFrameToken& frame_token,
const media::AudioSinkParameters& params)
-> scoped_refptr<media::AudioRendererSink> {
// AudioRendererMixer sinks are always used asynchronously and thus
// can operate without an authorization timeout value.
return NewOutputDevice(frame_token, params, base::TimeDelta());
});
mixer_manager_ =
std::make_unique<AudioRendererMixerManager>(std::move(create_sink_cb));
}
return mixer_manager_->CreateInput(
frame_token, main_frame_token, params.session_id, params.device_id,
AudioDeviceFactory::GetSourceLatencyType(source_type));
}
scoped_refptr<media::AudioCapturerSource>
AudioDeviceFactory::NewAudioCapturerSource(
WebLocalFrame* web_frame,
const media::AudioSourceParameters& params) {
return base::MakeRefCounted<media::AudioInputDevice>(
blink::AudioInputIPCFactory::CreateAudioInputIPC(
web_frame->GetLocalFrameToken(),
web_frame->GetTaskRunner(TaskType::kInternalMedia), params),
media::AudioInputDevice::Purpose::kUserInput,
media::AudioInputDevice::DeadStreamDetection::kEnabled);
}
media::OutputDeviceInfo AudioDeviceFactory::GetOutputDeviceInfo(
const blink::LocalFrameToken& frame_token,
const std::string& device_id) {
DCHECK(IsMainThread()) << __func__ << "() is called on a wrong thread.";
if (!sink_cache_) {
auto create_sink_cb = base::BindRepeating(
[](AudioDeviceFactory* factory, const LocalFrameToken& frame_token,
const std::string& device_id)
-> scoped_refptr<media::AudioRendererSink> {
// Note: This shouldn't use NewOutputDevice directly since tests
// override NewAudioRendererSink().
return factory->NewAudioRendererSink(
blink::WebAudioDeviceSourceType::kNone, frame_token,
media::AudioSinkParameters(base::UnguessableToken(), device_id));
},
base::Unretained(this));
constexpr base::TimeDelta kDeleteTimeout = base::Milliseconds(5000);
sink_cache_ = std::make_unique<AudioRendererSinkCache>(
base::ThreadPool::CreateSequencedTaskRunner(
{base::TaskPriority::BEST_EFFORT,
base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN,
base::MayBlock()}),
std::move(create_sink_cb), kDeleteTimeout);
}
return sink_cache_->GetSinkInfo(frame_token, device_id);
}
} // namespace blink
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