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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.
* 3. Neither the name of Apple Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE 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 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.
*/
#pragma once
#if ENABLE(WEB_AUDIO)
#include "AudioWorkletThread.h"
#include "MessagePort.h"
#include "WorkletGlobalScope.h"
#include <wtf/RobinHoodHashMap.h>
#include <wtf/ThreadSafeWeakHashSet.h>
namespace JSC {
class VM;
}
namespace WebCore {
class AudioWorkletProcessorConstructionData;
class AudioWorkletProcessor;
class AudioWorkletThread;
class JSAudioWorkletProcessorConstructor;
struct WorkletParameters;
class AudioWorkletGlobalScope final : public WorkletGlobalScope {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED(AudioWorkletGlobalScope);
public:
static RefPtr<AudioWorkletGlobalScope> tryCreate(AudioWorkletThread&, const WorkletParameters&);
~AudioWorkletGlobalScope();
ExceptionOr<void> registerProcessor(String&& name, Ref<JSAudioWorkletProcessorConstructor>&&);
RefPtr<AudioWorkletProcessor> createProcessor(const String& name, TransferredMessagePort, Ref<SerializedScriptValue>&& options);
void processorIsNoLongerNeeded(AudioWorkletProcessor&);
void visitProcessors(JSC::AbstractSlotVisitor&);
size_t currentFrame() const { return m_currentFrame; }
float sampleRate() const { return m_sampleRate; }
double currentTime() const { return m_sampleRate > 0.0 ? m_currentFrame / static_cast<double>(m_sampleRate) : 0.0; }
AudioWorkletThread& thread() const;
void prepareForDestruction() final;
std::unique_ptr<AudioWorkletProcessorConstructionData> takePendingProcessorConstructionData();
void handlePreRenderTasks();
void handlePostRenderTasks(size_t currentFrame);
FetchOptions::Destination destination() const final { return FetchOptions::Destination::Audioworklet; }
private:
AudioWorkletGlobalScope(AudioWorkletThread&, Ref<JSC::VM>&&, const WorkletParameters&);
bool isAudioWorkletGlobalScope() const final { return true; }
size_t m_currentFrame { 0 };
const float m_sampleRate;
MemoryCompactRobinHoodHashMap<String, RefPtr<JSAudioWorkletProcessorConstructor>> m_processorConstructorMap;
ThreadSafeWeakHashSet<AudioWorkletProcessor> m_processors;
std::unique_ptr<AudioWorkletProcessorConstructionData> m_pendingProcessorConstructionData;
std::optional<JSC::VM::DrainMicrotaskDelayScope> m_delayMicrotaskDrainingDuringRendering;
};
} // namespace WebCore
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::AudioWorkletGlobalScope)
static bool isType(const WebCore::ScriptExecutionContext& context)
{
auto* workletGlobalScope = dynamicDowncast<WebCore::WorkletGlobalScope>(context);
return workletGlobalScope && workletGlobalScope->isAudioWorkletGlobalScope();
}
static bool isType(const WebCore::WorkletGlobalScope& context) { return context.isAudioWorkletGlobalScope(); }
SPECIALIZE_TYPE_TRAITS_END()
#endif // ENABLE(WEB_AUDIO)
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