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/*
* Copyright (C) 2012, 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.
*/
#pragma once
#include "BaseAudioContext.h"
#include "JSDOMPromiseDeferredForward.h"
#include "OfflineAudioDestinationNode.h"
#include <wtf/HashMap.h>
#include <wtf/Lock.h>
#include <wtf/UniqueRef.h>
namespace WebCore {
struct OfflineAudioContextOptions;
class OfflineAudioContext final : public BaseAudioContext {
WTF_MAKE_ISO_ALLOCATED(OfflineAudioContext);
public:
static ExceptionOr<Ref<OfflineAudioContext>> create(ScriptExecutionContext&, const OfflineAudioContextOptions&);
static ExceptionOr<Ref<OfflineAudioContext>> create(ScriptExecutionContext&, unsigned numberOfChannels, unsigned length, float sampleRate);
void startRendering(Ref<DeferredPromise>&&);
void suspendRendering(double suspendTime, Ref<DeferredPromise>&&);
void resumeRendering(Ref<DeferredPromise>&&);
void finishedRendering(bool didRendering);
void didSuspendRendering(size_t frame);
unsigned length() const { return m_length; }
bool shouldSuspend();
OfflineAudioDestinationNode& destination() final { return m_destinationNode.get(); }
const OfflineAudioDestinationNode& destination() const final { return m_destinationNode.get(); }
private:
OfflineAudioContext(Document&, const OfflineAudioContextOptions&);
AudioBuffer* renderTarget() const { return destination().renderTarget(); }
// ActiveDOMObject
const char* activeDOMObjectName() const final;
bool virtualHasPendingActivity() const final;
void settleRenderingPromise(ExceptionOr<Ref<AudioBuffer>>&&);
void uninitialize() final;
bool isOfflineContext() const final { return true; }
UniqueRef<OfflineAudioDestinationNode> m_destinationNode;
RefPtr<DeferredPromise> m_pendingRenderingPromise;
HashMap<unsigned /* frame */, RefPtr<DeferredPromise>, IntHash<unsigned>, WTF::UnsignedWithZeroKeyHashTraits<unsigned>> m_suspendRequests;
unsigned m_length;
bool m_didStartRendering { false };
};
} // namespace WebCore
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::OfflineAudioContext)
static bool isType(const WebCore::BaseAudioContext& context) { return context.isOfflineContext(); }
SPECIALIZE_TYPE_TRAITS_END()
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