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/*
* Copyright (C) 2020 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "RemoteAudioDestinationProxy.h"
#if ENABLE(GPU_PROCESS) && ENABLE(WEB_AUDIO)
#include "GPUConnectionToWebProcess.h"
#include "Logging.h"
#include "RemoteAudioDestinationManagerMessages.h"
#include "WebCoreArgumentCoders.h"
#include "WebProcess.h"
#include <WebCore/AudioBus.h>
#include <WebCore/AudioUtilities.h>
#if PLATFORM(COCOA)
#include <WebCore/CARingBuffer.h>
#include <WebCore/WebAudioBufferList.h>
#include <mach/mach_time.h>
#endif
namespace WebKit {
// Allocate a ring buffer large enough to contain 2 seconds of audio.
constexpr size_t ringBufferSizeInSecond = 2;
using AudioDestination = WebCore::AudioDestination;
using AudioIOCallback = WebCore::AudioIOCallback;
Ref<AudioDestination> RemoteAudioDestinationProxy::create(AudioIOCallback& callback,
const String& inputDeviceId, unsigned numberOfInputChannels, unsigned numberOfOutputChannels, float sampleRate)
{
return adoptRef(*new RemoteAudioDestinationProxy(callback, inputDeviceId, numberOfInputChannels, numberOfOutputChannels, sampleRate));
}
RemoteAudioDestinationProxy::RemoteAudioDestinationProxy(AudioIOCallback& callback, const String& inputDeviceId, unsigned numberOfInputChannels, unsigned numberOfOutputChannels, float sampleRate)
#if PLATFORM(COCOA)
: WebCore::AudioDestinationCocoa(callback, numberOfOutputChannels, sampleRate, false)
, m_numberOfFrames(hardwareSampleRate() * ringBufferSizeInSecond)
, m_ringBuffer(makeUnique<WebCore::CARingBuffer>(makeUniqueRef<SharedRingBufferStorage>(std::bind(&RemoteAudioDestinationProxy::storageChanged, this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3))))
, m_sampleRate(hardwareSampleRate())
#else
: WebCore::AudioDestinationGStreamer(callback, numberOfOutputChannels, sampleRate)
, m_numberOfOutputChannels(numberOfOutputChannels)
#endif
, m_inputDeviceId(inputDeviceId)
, m_numberOfInputChannels(numberOfInputChannels)
{
}
void RemoteAudioDestinationProxy::startRenderingThread()
{
ASSERT(!m_renderThread);
auto offThreadRendering = [this]() mutable {
do {
m_renderSemaphore.wait();
if (m_shouldStopThread)
break;
renderQuantum();
} while (!m_shouldStopThread);
};
m_renderThread = Thread::create("RemoteAudioDestinationProxy render thread", WTFMove(offThreadRendering), ThreadType::Audio, Thread::QOS::UserInteractive);
}
void RemoteAudioDestinationProxy::stopRenderingThread()
{
if (!m_renderThread)
return;
m_shouldStopThread = true;
m_renderSemaphore.signal();
m_renderThread->waitForCompletion();
m_renderThread = nullptr;
}
IPC::Connection* RemoteAudioDestinationProxy::connection()
{
if (!m_gpuProcessConnection) {
m_gpuProcessConnection = WebProcess::singleton().ensureGPUProcessConnection();
m_gpuProcessConnection->addClient(*this);
if (!m_gpuProcessConnection->connection().sendSync(Messages::RemoteAudioDestinationManager::CreateAudioDestination(m_inputDeviceId, m_numberOfInputChannels, numberOfOutputChannels(), sampleRate(), hardwareSampleRate(), m_renderSemaphore), Messages::RemoteAudioDestinationManager::CreateAudioDestination::Reply(m_destinationID), 0)) {
// The GPUProcess likely crashed during this synchronous IPC. gpuProcessConnectionDidClose() will get called to reconnect to the GPUProcess.
RELEASE_LOG_ERROR(Media, "RemoteAudioDestinationProxy::destinationID: IPC to create the audio destination failed, the GPUProcess likely crashed.");
return nullptr;
}
#if PLATFORM(COCOA)
m_currentFrame = 0;
AudioStreamBasicDescription streamFormat;
getAudioStreamBasicDescription(streamFormat);
m_ringBuffer->allocate(streamFormat, m_numberOfFrames);
m_audioBufferList = makeUnique<WebCore::WebAudioBufferList>(streamFormat);
m_audioBufferList->setSampleCount(WebCore::AudioUtilities::renderQuantumSize);
#endif
startRenderingThread();
}
return m_destinationID ? &m_gpuProcessConnection->connection() : nullptr;
}
IPC::Connection* RemoteAudioDestinationProxy::existingConnection()
{
return m_gpuProcessConnection && m_destinationID ? &m_gpuProcessConnection->connection() : nullptr;
}
RemoteAudioDestinationProxy::~RemoteAudioDestinationProxy()
{
if (m_gpuProcessConnection && m_destinationID) {
m_gpuProcessConnection->connection().sendWithAsyncReply(
Messages::RemoteAudioDestinationManager::DeleteAudioDestination(m_destinationID), [] {
// Can't remove this from proxyMap() here because the object would have been already deleted.
});
}
stopRenderingThread();
}
void RemoteAudioDestinationProxy::startRendering(CompletionHandler<void(bool)>&& completionHandler)
{
auto* connection = this->connection();
if (!connection)
return completionHandler(false);
connection->sendWithAsyncReply(Messages::RemoteAudioDestinationManager::StartAudioDestination(m_destinationID), [this, protectedThis = Ref { *this }, completionHandler = WTFMove(completionHandler)](bool isPlaying) mutable {
setIsPlaying(isPlaying);
completionHandler(isPlaying);
});
}
void RemoteAudioDestinationProxy::stopRendering(CompletionHandler<void(bool)>&& completionHandler)
{
auto* connection = this->connection();
if (!connection)
return completionHandler(false);
connection->sendWithAsyncReply(Messages::RemoteAudioDestinationManager::StopAudioDestination(m_destinationID), [this, protectedThis = Ref { *this }, completionHandler = WTFMove(completionHandler)](bool isPlaying) mutable {
setIsPlaying(isPlaying);
completionHandler(!isPlaying);
});
}
void RemoteAudioDestinationProxy::renderQuantum()
{
ASSERT(!isMainRunLoop());
#if PLATFORM(COCOA)
AudioDestinationCocoa::render(m_currentFrame / static_cast<double>(m_sampleRate), mach_absolute_time(), WebCore::AudioUtilities::renderQuantumSize, m_audioBufferList->list());
m_ringBuffer->store(m_audioBufferList->list(), WebCore::AudioUtilities::renderQuantumSize, m_currentFrame);
m_currentFrame += WebCore::AudioUtilities::renderQuantumSize;
#endif
}
#if PLATFORM(COCOA)
void RemoteAudioDestinationProxy::storageChanged(SharedMemory* storage, const WebCore::CAAudioStreamDescription& format, size_t frameCount)
{
auto* connection = existingConnection();
if (!connection)
return;
SharedMemory::Handle handle;
if (storage)
storage->createHandle(handle, SharedMemory::Protection::ReadOnly);
m_gpuProcessConnection->connection().send(Messages::RemoteAudioDestinationManager::AudioSamplesStorageChanged { m_destinationID, WTFMove(handle), format, frameCount }, 0);
}
#endif
void RemoteAudioDestinationProxy::gpuProcessConnectionDidClose(GPUProcessConnection& oldConnection)
{
oldConnection.removeClient(*this);
stopRenderingThread();
m_gpuProcessConnection = nullptr;
m_destinationID = { };
if (isPlaying())
startRendering([](bool) { });
}
} // namespace WebKit
#endif // ENABLE(GPU_PROCESS) && ENABLE(WEB_AUDIO)
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