AudioContext.idl   [plain text]

/*
 * 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
 * modification, are permitted provided that the following conditions
 * are met:
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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
 *    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
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 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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 */

[
    EnabledBySetting=WebAudio,
    Conditional=WEB_AUDIO,
    ActiveDOMObject,
    CustomConstructor,
    EventTarget,
    InterfaceName=webkitAudioContext
] interface AudioContext {
    // 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 float currentTime;

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

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

    // Number of AudioBufferSourceNodes that are currently playing.
    readonly attribute unsigned long activeSourceCount;
    
    [RaisesException] AudioBuffer createBuffer(unsigned long numberOfChannels, unsigned long numberOfFrames, float sampleRate);
    [RaisesException] AudioBuffer createBuffer(ArrayBuffer? buffer, boolean mixToMono);

    // Asynchronous audio file data decoding.
    [RaisesException] void decodeAudioData(ArrayBuffer audioData, AudioBufferCallback successCallback, optional AudioBufferCallback errorCallback);

    // Sources
    AudioBufferSourceNode createBufferSource();

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