| /* |
| * 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/WeakHashSet.h> |
| |
| namespace JSC { |
| class VM; |
| } |
| |
| namespace WebCore { |
| |
| class AudioWorkletProcessorConstructionData; |
| class AudioWorkletProcessor; |
| class AudioWorkletThread; |
| class JSAudioWorkletProcessorConstructor; |
| |
| struct WorkletParameters; |
| |
| class AudioWorkletGlobalScope final : public WorkletGlobalScope { |
| WTF_MAKE_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; |
| Lock m_processorsLock; |
| WeakHashSet<AudioWorkletProcessor, WTF::EmptyCounter, EnableWeakPtrThreadingAssertions::No> m_processors WTF_GUARDED_BY_LOCK(m_processorsLock); |
| std::unique_ptr<AudioWorkletProcessorConstructionData> m_pendingProcessorConstructionData; |
| std::optional<JSC::JSLockHolder> m_lockDuringRendering; |
| }; |
| |
| } // namespace WebCore |
| |
| SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::AudioWorkletGlobalScope) |
| static bool isType(const WebCore::ScriptExecutionContext& context) { return is<WebCore::WorkletGlobalScope>(context) && downcast<WebCore::WorkletGlobalScope>(context).isAudioWorkletGlobalScope(); } |
| static bool isType(const WebCore::WorkletGlobalScope& context) { return context.isAudioWorkletGlobalScope(); } |
| SPECIALIZE_TYPE_TRAITS_END() |
| |
| #endif // ENABLE(WEB_AUDIO) |