chromium/src/third_party/blink/renderer/modules/webaudio/audio_context.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
 * 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
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 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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enum AudioContextLatencyCategory {
    "balanced",
    "interactive",
    "playback"
};

// https://webaudio.github.io/web-audio-api/#AudioContext
[
    Exposed=Window,
    ActiveScriptWrappable
] interface AudioContext : BaseAudioContext {
    [CallWith=Document, RaisesException, Measure] constructor(optional AudioContextOptions contextOptions = {});
    [MeasureAs=AudioContextSuspend, CallWith=ScriptState, ImplementedAs=suspendContext] Promise<void> suspend();
    [MeasureAs=AudioContextClose, RaisesException, CallWith=ScriptState, ImplementedAs=closeContext] Promise<void> close();
    [MeasureAs=AudioContextResume, RaisesException, CallWith=ScriptState, ImplementedAs=resumeContext] Promise<void> resume();

    // Output timestamp
    [MeasureAs=AudioContextGetOutputTimestamp, CallWith=ScriptState] AudioTimestamp getOutputTimestamp();

    // Number of seconds of processing latency incurred by the AudioContext
    // passing the audio from the AudioDestinationNode to the audio subsystem
    [HighEntropy=Direct, MeasureAs=AudioContextBaseLatency] readonly attribute double baseLatency;

    [RaisesException, MeasureAs=AudioContextCreateMediaElementSource] MediaElementAudioSourceNode createMediaElementSource(HTMLMediaElement mediaElement);
    [RaisesException, MeasureAs=AudioContextCreateMediaStreamSource] MediaStreamAudioSourceNode createMediaStreamSource(MediaStream mediaStream);
    [RaisesException, MeasureAs=AudioContextCreateMediaStreamDestination] MediaStreamAudioDestinationNode createMediaStreamDestination();

};