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/*
* Copyright (C) 2024 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
#if ENABLE(WEB_AUDIO)
#include "AudioDestination.h"
namespace WebCore {
class SharedAudioDestinationAdapter;
class SharedAudioDestination final : public AudioDestination, public ThreadSafeRefCounted<SharedAudioDestination, WTF::DestructionThread::Main> {
public:
using AudioDestinationCreationFunction = Function<Ref<AudioDestination>(AudioIOCallback&)>;
WEBCORE_EXPORT static Ref<SharedAudioDestination> create(AudioIOCallback&, unsigned numberOfOutputChannels, float sampleRate, AudioDestinationCreationFunction&&);
WEBCORE_EXPORT virtual ~SharedAudioDestination();
void ref() const final { return ThreadSafeRefCounted::ref(); }
void deref() const final { return ThreadSafeRefCounted::deref(); }
void sharedRender(AudioBus* sourceBus, AudioBus* destinationBus, size_t framesToProcess, const AudioIOPosition&);
private:
SharedAudioDestination(AudioIOCallback&, unsigned numberOfOutputChannels, float sampleRate, AudioDestinationCreationFunction&&);
// AudioDestination
void start(Function<void(Function<void()>&&)>&& dispatchToRenderThread, CompletionHandler<void(bool)>&&) final;
void stop(CompletionHandler<void(bool)>&&) final;
bool isPlaying() final { return m_isPlaying; }
unsigned framesPerBuffer() const final;
MediaTime outputLatency() const final;
void setIsPlaying(bool);
Ref<SharedAudioDestinationAdapter> protectedOutputAdapter() const;
Lock m_dispatchToRenderThreadLock;
Function<void(Function<void()>&&)> m_dispatchToRenderThread WTF_GUARDED_BY_LOCK(m_dispatchToRenderThreadLock);
bool m_isPlaying { false };
Ref<SharedAudioDestinationAdapter> m_outputAdapter;
};
} // namespace WebCore
#endif // ENABLE(WEB_AUDIO)
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