82 lines
3.0 KiB
C++
82 lines
3.0 KiB
C++
/*
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* Copyright (C) 2011, Google Inc. All rights reserved.
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* Copyright (C) 2020-2021, 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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* 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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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. 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 INC. 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 ON
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* 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 THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "AudioDestinationNode.h"
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#include <wtf/RefPtr.h>
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#include <wtf/Threading.h>
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namespace WebCore {
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class AudioBuffer;
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class AudioBus;
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class OfflineAudioContext;
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class OfflineAudioDestinationNode final : public AudioDestinationNode {
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WTF_MAKE_ISO_ALLOCATED(OfflineAudioDestinationNode);
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public:
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OfflineAudioDestinationNode(OfflineAudioContext&, unsigned numberOfChannels, float sampleRate, RefPtr<AudioBuffer>&& renderTarget);
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~OfflineAudioDestinationNode();
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OfflineAudioContext& context();
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const OfflineAudioContext& context() const;
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AudioBuffer* renderTarget() const { return m_renderTarget.get(); }
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// AudioNode
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void initialize() final;
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void uninitialize() final;
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// AudioDestinationNode
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void enableInput(const String&) final { }
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void startRendering(CompletionHandler<void(std::optional<Exception>&&)>&&) final;
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private:
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enum class RenderResult { Failure, Suspended, Complete };
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RenderResult renderOnAudioThread();
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void notifyOfflineRenderingSuspended();
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bool requiresTailProcessing() const final { return false; }
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unsigned maxChannelCount() const final { return m_numberOfChannels; }
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unsigned m_numberOfChannels;
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// This AudioNode renders into this AudioBuffer.
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RefPtr<AudioBuffer> m_renderTarget;
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// Temporary AudioBus for each render quantum.
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RefPtr<AudioBus> m_renderBus;
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// Rendering thread.
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RefPtr<Thread> m_renderThread;
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size_t m_framesToProcess;
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size_t m_destinationOffset { 0 };
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bool m_startedRendering { false };
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};
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} // namespace WebCore
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