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/*
* Copyright (C) 2011, Google Inc. All rights reserved.
* Copyright (C) 2020-2021, 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"
#if ENABLE(WEB_AUDIO)
#include "OfflineAudioDestinationNode.h"
#include "AudioBuffer.h"
#include "AudioBus.h"
#include "AudioContext.h"
#include "AudioUtilities.h"
#include "AudioWorklet.h"
#include "AudioWorkletMessagingProxy.h"
#include "HRTFDatabaseLoader.h"
#include "OfflineAudioContext.h"
#include "WorkerRunLoop.h"
#include <JavaScriptCore/GenericTypedArrayViewInlines.h>
#include <JavaScriptCore/JSGenericTypedArrayViewInlines.h>
#include <algorithm>
#include <wtf/IsoMallocInlines.h>
#include <wtf/MainThread.h>
#include <wtf/threads/BinarySemaphore.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(OfflineAudioDestinationNode);
OfflineAudioDestinationNode::OfflineAudioDestinationNode(OfflineAudioContext& context, unsigned numberOfChannels, float sampleRate, RefPtr<AudioBuffer>&& renderTarget)
: AudioDestinationNode(context, sampleRate)
, m_numberOfChannels(numberOfChannels)
, m_renderTarget(WTFMove(renderTarget))
, m_renderBus(AudioBus::create(numberOfChannels, AudioUtilities::renderQuantumSize))
, m_framesToProcess(m_renderTarget ? m_renderTarget->length() : 0)
{
initializeDefaultNodeOptions(numberOfChannels, ChannelCountMode::Explicit, ChannelInterpretation::Speakers);
}
OfflineAudioDestinationNode::~OfflineAudioDestinationNode()
{
uninitialize();
}
OfflineAudioContext& OfflineAudioDestinationNode::context()
{
return downcast<OfflineAudioContext>(AudioDestinationNode::context());
}
const OfflineAudioContext& OfflineAudioDestinationNode::context() const
{
return downcast<OfflineAudioContext>(AudioDestinationNode::context());
}
void OfflineAudioDestinationNode::initialize()
{
if (isInitialized())
return;
AudioNode::initialize();
}
void OfflineAudioDestinationNode::uninitialize()
{
if (!isInitialized())
return;
if (m_startedRendering) {
if (m_renderThread) {
m_renderThread->waitForCompletion();
m_renderThread = nullptr;
}
if (auto* workletProxy = context().audioWorklet().proxy()) {
BinarySemaphore semaphore;
workletProxy->postTaskForModeToWorkletGlobalScope([&semaphore](ScriptExecutionContext&) mutable {
semaphore.signal();
}, WorkerRunLoop::defaultMode());
semaphore.wait();
}
}
AudioNode::uninitialize();
}
void OfflineAudioDestinationNode::startRendering(CompletionHandler<void(std::optional<Exception>&&)>&& completionHandler)
{
ALWAYS_LOG(LOGIDENTIFIER);
ASSERT(isMainThread());
ASSERT(m_renderTarget.get());
if (!m_renderTarget.get())
return completionHandler(Exception { InvalidStateError, "OfflineAudioContextNode has no rendering buffer"_s });
if (m_startedRendering)
return completionHandler(Exception { InvalidStateError, "Already started rendering"_s });
m_startedRendering = true;
Ref protectedThis { *this };
auto offThreadRendering = [this, protectedThis = WTFMove(protectedThis)]() mutable {
auto result = renderOnAudioThread();
callOnMainThread([this, result, currentSampleFrame = this->currentSampleFrame(), protectedThis = WTFMove(protectedThis)]() mutable {
context().postTask([this, protectedThis = WTFMove(protectedThis), result, currentSampleFrame]() mutable {
m_startedRendering = false;
switch (result) {
case RenderResult::Failure:
context().finishedRendering(false);
break;
case RenderResult::Complete:
context().finishedRendering(true);
break;
case RenderResult::Suspended:
context().didSuspendRendering(currentSampleFrame);
break;
}
});
});
};
if (auto* workletProxy = context().audioWorklet().proxy()) {
workletProxy->postTaskForModeToWorkletGlobalScope([offThreadRendering = WTFMove(offThreadRendering)](ScriptExecutionContext&) mutable {
offThreadRendering();
}, WorkerRunLoop::defaultMode());
return completionHandler(std::nullopt);
}
// FIXME: We should probably limit the number of threads we create for offline audio.
m_renderThread = Thread::create("offline renderer", WTFMove(offThreadRendering), ThreadType::Audio, Thread::QOS::Default);
completionHandler(std::nullopt);
}
auto OfflineAudioDestinationNode::renderOnAudioThread() -> RenderResult
{
ASSERT(!isMainThread());
ASSERT(m_renderBus.get());
if (!m_renderBus.get())
return RenderResult::Failure;
RELEASE_ASSERT(context().isInitialized());
bool channelsMatch = m_renderBus->numberOfChannels() == m_renderTarget->numberOfChannels();
ASSERT(channelsMatch);
if (!channelsMatch)
return RenderResult::Failure;
bool isRenderBusAllocated = m_renderBus->length() >= AudioUtilities::renderQuantumSize;
ASSERT(isRenderBusAllocated);
if (!isRenderBusAllocated)
return RenderResult::Failure;
// Break up the render target into smaller "render quantize" sized pieces.
// Render until we're finished.
unsigned numberOfChannels = m_renderTarget->numberOfChannels();
while (m_framesToProcess > 0) {
if (context().shouldSuspend())
return RenderResult::Suspended;
// Render one render quantum.
renderQuantum(m_renderBus.get(), AudioUtilities::renderQuantumSize, { });
size_t framesAvailableToCopy = std::min(m_framesToProcess, AudioUtilities::renderQuantumSize);
for (unsigned channelIndex = 0; channelIndex < numberOfChannels; ++channelIndex) {
const float* source = m_renderBus->channel(channelIndex)->data();
float* destination = m_renderTarget->channelData(channelIndex)->data();
memcpy(destination + m_destinationOffset, source, sizeof(float) * framesAvailableToCopy);
}
m_destinationOffset += framesAvailableToCopy;
m_framesToProcess -= framesAvailableToCopy;
}
return RenderResult::Complete;
}
} // namespace WebCore
#endif // ENABLE(WEB_AUDIO)
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