Source/WebCore/Modules/webaudio/AudioContext.h

/*
 * Copyright (C) 2010 Google Inc. All rights reserved.
 * Copyright (C) 2016-2020 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.
 *
 * 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
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#pragma once

#include "AudioContextOptions.h"
#include "BaseAudioContext.h"

namespace WebCore {

class DefaultAudioDestinationNode;

class AudioContext : public BaseAudioContext {
    WTF_MAKE_ISO_ALLOCATED(AudioContext);
public:
    // Create an AudioContext for rendering to the audio hardware.
    static ExceptionOr<Ref<AudioContext>> create(Document&, const AudioContextOptions& = { });

    void close(DOMPromiseDeferred<void>&&);

    DefaultAudioDestinationNode* destination();
    double baseLatency();

#if ENABLE(VIDEO)
    ExceptionOr<Ref<MediaElementAudioSourceNode>> createMediaElementSource(HTMLMediaElement&);
#endif
#if ENABLE(MEDIA_STREAM)
    ExceptionOr<Ref<MediaStreamAudioSourceNode>> createMediaStreamSource(MediaStream&);
    ExceptionOr<Ref<MediaStreamAudioDestinationNode>> createMediaStreamDestination();
#endif

private:
    AudioContext(Document&, const AudioContextOptions&);
    AudioContext(Document&, AudioBuffer* renderTarget);
};

} // WebCore