Source/WebCore/Modules/webaudio/WebKitAudioContext.idl

/*
 * Copyright (C) 2010, Google Inc. All rights reserved.
 * Copyright (C) 2011 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
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 *    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
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 *
 * 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
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[
    ActiveDOMObject,
    Conditional=WEB_AUDIO,
    EnabledBySetting=WebAudio&PrefixedWebAudio,
    ExportMacro=WEBCORE_EXPORT,
    InterfaceName=webkitAudioContext,
] interface WebKitAudioContext : EventTarget {
    [CallWith=Document, MayThrowException] constructor();

    // All rendered audio ultimately connects to destination, which represents the audio hardware.
    readonly attribute AudioDestinationNode destination;

    // All scheduled times are relative to this time in seconds.
    readonly attribute unrestricted double currentTime;

    // All AudioNodes in the context run at this sample-rate (sample-frames per second).
    readonly attribute unrestricted float sampleRate;

    // All panning is relative to this listener.
    readonly attribute AudioListener listener;

    [ImplementedAs=suspendRendering] Promise<void> suspend();
    [ImplementedAs=resumeRendering] Promise<void> resume();
    Promise<void> close();

    readonly attribute AudioContextState state;
    attribute EventHandler onstatechange;

    // Number of AudioBufferSourceNodes that are currently playing.
    readonly attribute unsigned long activeSourceCount;

    [MayThrowException] AudioBuffer createBuffer(unsigned long numberOfChannels, unsigned long numberOfFrames, unrestricted float sampleRate);
    [MayThrowException] AudioBuffer createBuffer(ArrayBuffer buffer, boolean mixToMono);

    // Asynchronous audio file data decoding.
    // FIXME: successCallback should be optional and the callbacks should not be nullable. This should also return a Promise.
    void decodeAudioData(ArrayBuffer audioData, AudioBufferCallback? successCallback, optional AudioBufferCallback? errorCallback);

    // Sources
    [MayThrowException] AudioBufferSourceNode createBufferSource();

    [Conditional=VIDEO, MayThrowException] MediaElementAudioSourceNode createMediaElementSource(HTMLMediaElement mediaElement);

    [Conditional=MEDIA_STREAM, MayThrowException] MediaStreamAudioSourceNode createMediaStreamSource(MediaStream mediaStream);
    [Conditional=MEDIA_STREAM, MayThrowException] MediaStreamAudioDestinationNode createMediaStreamDestination();

    // Processing nodes
    [MayThrowException] GainNode createGain();
    [MayThrowException] DelayNode createDelay(optional unrestricted double maxDelayTime = 1);
    [MayThrowException] BiquadFilterNode createBiquadFilter();
    [MayThrowException] WaveShaperNode createWaveShaper();
    [MayThrowException, ImplementedAs=createWebKitPanner] WebKitAudioPannerNode createPanner();
    [MayThrowException] ConvolverNode createConvolver();
    [MayThrowException] DynamicsCompressorNode createDynamicsCompressor();
    [MayThrowException] AnalyserNode createAnalyser();
    [MayThrowException] ScriptProcessorNode createScriptProcessor(optional unsigned long bufferSize = 0, optional unsigned long numberOfInputChannels = 2, optional unsigned long numberOfOutputChannels = 2);
    [MayThrowException] OscillatorNode createOscillator();
    [MayThrowException] PeriodicWave createPeriodicWave(Float32Array real, Float32Array imag);

    // Channel splitting and merging
    [MayThrowException] ChannelSplitterNode createChannelSplitter(optional unsigned long numberOfOutputs = 6);
    [MayThrowException] ChannelMergerNode createChannelMerger(optional unsigned long numberOfInputs = 6);

    // Offline rendering
    // void prepareOfflineBufferRendering(unsigned long numberOfChannels, unsigned long numberOfFrames, unrestricted float sampleRate);
    attribute EventHandler oncomplete;
    void startRendering();
};