94 lines
3.9 KiB
C++
94 lines
3.9 KiB
C++
/*
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* Copyright (C) 2020 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of Apple Inc. ("Apple") nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#if ENABLE(WEB_AUDIO)
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#include "AudioWorkletThread.h"
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#include "MessagePort.h"
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#include "WorkletGlobalScope.h"
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namespace JSC {
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class VM;
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}
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namespace WebCore {
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class AudioWorkletProcessorConstructionData;
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class AudioWorkletProcessor;
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class AudioWorkletThread;
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class JSAudioWorkletProcessorConstructor;
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struct WorkletParameters;
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class AudioWorkletGlobalScope final : public WorkletGlobalScope {
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WTF_MAKE_ISO_ALLOCATED(AudioWorkletGlobalScope);
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public:
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static RefPtr<AudioWorkletGlobalScope> tryCreate(AudioWorkletThread&, const WorkletParameters&);
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~AudioWorkletGlobalScope();
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ExceptionOr<void> registerProcessor(String&& name, Ref<JSAudioWorkletProcessorConstructor>&&);
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RefPtr<AudioWorkletProcessor> createProcessor(const String& name, TransferredMessagePort, Ref<SerializedScriptValue>&& options);
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size_t currentFrame() const { return m_currentFrame; }
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float sampleRate() const { return m_sampleRate; }
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double currentTime() const { return m_sampleRate > 0.0 ? m_currentFrame / static_cast<double>(m_sampleRate) : 0.0; }
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AudioWorkletThread& thread() const;
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void prepareForDestruction() final;
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std::unique_ptr<AudioWorkletProcessorConstructionData> takePendingProcessorConstructionData();
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void handlePreRenderTasks();
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void handlePostRenderTasks(size_t currentFrame);
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FetchOptions::Destination destination() const final { return FetchOptions::Destination::Audioworklet; }
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private:
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AudioWorkletGlobalScope(AudioWorkletThread&, Ref<JSC::VM>&&, const WorkletParameters&);
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bool isAudioWorkletGlobalScope() const final { return true; }
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size_t m_currentFrame { 0 };
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const float m_sampleRate;
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HashMap<String, RefPtr<JSAudioWorkletProcessorConstructor>> m_processorConstructorMap;
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std::unique_ptr<AudioWorkletProcessorConstructionData> m_pendingProcessorConstructionData;
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std::optional<JSC::JSLockHolder> m_lockDuringRendering;
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};
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} // namespace WebCore
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SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::AudioWorkletGlobalScope)
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static bool isType(const WebCore::ScriptExecutionContext& context) { return is<WebCore::WorkletGlobalScope>(context) && downcast<WebCore::WorkletGlobalScope>(context).isAudioWorkletGlobalScope(); }
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static bool isType(const WebCore::WorkletGlobalScope& context) { return context.isAudioWorkletGlobalScope(); }
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SPECIALIZE_TYPE_TRAITS_END()
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#endif // ENABLE(WEB_AUDIO)
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