google-closure-compiler/externs/browser/w3c_rtc.js

Check, compile, optimize and compress Javascript with Closure-Compiler

/*
 * Copyright 2012 The Closure Compiler Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * @fileoverview Definitions for components of the WebRTC browser API.
 * @see https://www.w3.org/TR/webrtc/
 * @see https://tools.ietf.org/html/draft-ietf-rtcweb-jsep-19
 * @see https://developer.mozilla.org/en-US/docs/Web/API/WebRTC_API
 * @see https://www.w3.org/TR/mediacapture-streams/
 *
 * @externs
 * @author bemasc@google.com (Benjamin M. Schwartz)
 */

/**
 * @typedef {string}
 * @see {https://www.w3.org/TR/mediacapture-streams/
 *     #idl-def-MediaStreamTrackState}
 * In WebIDL this is an enum with values 'live', 'mute', and 'ended',
 * but there is no mechanism in Closure for describing a specialization of
 * the string type.
 */
var MediaStreamTrackState;

/**
 * @interface
 */
function SourceInfo() {}

/** @const {string} */
SourceInfo.prototype.kind;

/** @const {string} */
SourceInfo.prototype.id;

/** @const {?string} */
SourceInfo.prototype.label;

/** @const {boolean} */
SourceInfo.prototype.facing;

/**
 * @interface
 * @see https://w3c.github.io/mediacapture-image/#mediasettingsrange-section
 */
function MediaSettingsRange() {}

/**
 * @const {number}
 */
MediaSettingsRange.prototype.max;

/**
 * @const {number}
 */
MediaSettingsRange.prototype.min;

/**
 * @const {number}
 */
MediaSettingsRange.prototype.step;

/**
 * @interface
 * @see https://www.w3.org/TR/mediacapture-streams/#idl-def-MediaTrackCapabilities
 * @see https://w3c.github.io/mediacapture-image/#mediatrackcapabilities-section
 * @see https://www.w3.org/TR/screen-capture
 */
function MediaTrackCapabilities() {}

/** @type {number} */
MediaTrackCapabilities.prototype.width;

/** @type {number} */
MediaTrackCapabilities.prototype.height;

/** @type {number} */
MediaTrackCapabilities.prototype.aspectRatio;

/** @type {number} */
MediaTrackCapabilities.prototype.frameRate;

/** @type {!Array<string>} */
MediaTrackCapabilities.prototype.facingMode;

/** @type {!Array<string>} */
MediaTrackCapabilities.prototype.resizeMode;

/** @type {number} */
MediaTrackCapabilities.prototype.volume;

/** @type {number} */
MediaTrackCapabilities.prototype.sampleRate;

/** @type {number} */
MediaTrackCapabilities.prototype.sampleSize;

/** @type {!Array<boolean>} */
MediaTrackCapabilities.prototype.echoCancellation;

/** @type {number} */
MediaTrackCapabilities.prototype.latency;

/** @type {number} */
MediaTrackCapabilities.prototype.channelCount;

/** @type {string} */
MediaTrackCapabilities.prototype.deviceId;

/** @type {string} */
MediaTrackCapabilities.prototype.groupId;

/** @type {!Array<string>} */
MediaTrackCapabilities.prototype.whiteBalanceMode;

/** @type {!Array<string>} */
MediaTrackCapabilities.prototype.exposureMode;

/** @type {!Array<string>} */
MediaTrackCapabilities.prototype.focusMode;

/** @type {!MediaSettingsRange} */
MediaTrackCapabilities.prototype.exposureCompensation;

/** @type {!MediaSettingsRange} */
MediaTrackCapabilities.prototype.colorTemperature

/** @type {!MediaSettingsRange} */
MediaTrackCapabilities.prototype.iso

/** @type {!MediaSettingsRange} */
MediaTrackCapabilities.prototype.brightness

/** @type {!MediaSettingsRange} */
MediaTrackCapabilities.prototype.contrast

/** @type {!MediaSettingsRange} */
MediaTrackCapabilities.prototype.saturation

/** @type {!MediaSettingsRange} */
MediaTrackCapabilities.prototype.sharpness

/** @type {!MediaSettingsRange} */
MediaTrackCapabilities.prototype.zoom

/** @type {boolean} */
MediaTrackCapabilities.prototype.torch

/** @type {string|undefined} */
MediaTrackCapabilities.prototype.displaySurface;

/** @type {boolean|undefined} */
MediaTrackCapabilities.prototype.logicalSurface;

/** @type {Array<string>} */
MediaTrackCapabilities.prototype.cursor;

/** @type {!Array<boolean>|undefined} */
MediaTrackCapabilities.prototype.backgroundBlur;

/**
 * @interface
 * @see https://www.w3.org/TR/screen-capture
 * @see https://www.w3.org/TR/screen-capture/#extensions-to-mediatracksettings
 * @see https://www.w3.org/TR/mediacapture-streams/#media-track-settings
 * @see https://w3c.github.io/mediacapture-image/#mediatracksettings-section
 */
function MediaTrackSettings() {}

/** @type {number} */
MediaTrackSettings.prototype.width;

/** @type {number} */
MediaTrackSettings.prototype.height;

/** @type {number} */
MediaTrackSettings.prototype.aspectRatio;

/** @type {number} */
MediaTrackSettings.prototype.frameRate;

/** @type {string} */
MediaTrackSettings.prototype.facingMode;

/** @type {string} */
MediaTrackSettings.prototype.resizeMode;

/** @type {string|undefined} */
MediaTrackSettings.prototype.displaySurface;

/** @type {boolean|undefined} */
MediaTrackSettings.prototype.logicalSurface;

/** @type {string|undefined} */
MediaTrackSettings.prototype.cursor;

/** @type {boolean|undefined} */
MediaTrackSettings.prototype.restrictOwnAudio;

/** @type {boolean|undefined} */
MediaTrackSettings.prototype.suppressLocalAudioPlayback;

/** @type {number} */
MediaTrackSettings.prototype.volume;

/** @type {number} */
MediaTrackSettings.prototype.sampleRate;

/** @type {number} */
MediaTrackSettings.prototype.sampleSize;

/** @type {boolean} */
MediaTrackSettings.prototype.echoCancellation;

/** @type {boolean} */
MediaTrackSettings.prototype.autoGainControl;

/** @type {boolean} */
MediaTrackSettings.prototype.noiseSuppression;

/** @type {number} */
MediaTrackSettings.prototype.latency;

/** @type {number} */
MediaTrackSettings.prototype.channelCount;

/** @type {string} */
MediaTrackSettings.prototype.deviceId;

/** @type {string} */
MediaTrackSettings.prototype.groupId;

/** @type {string} */
MediaTrackSettings.prototype.whiteBalanceMode;

/** @type {string} */
MediaTrackSettings.prototype.exposureMode;

/** @type {string} */
MediaTrackSettings.prototype.focusMode;

/** @type {!Array<{x: number, y: number}>} */
MediaTrackSettings.prototype.pointsOfInterest;

/** @type {number} */
MediaTrackSettings.prototype.exposureCompensation;

/** @type {number} */
MediaTrackSettings.prototype.colorTemperature;

/** @type {number} */
MediaTrackSettings.prototype.iso;

/** @type {number} */
MediaTrackSettings.prototype.brightness;

/** @type {number} */
MediaTrackSettings.prototype.contrast;

/** @type {number} */
MediaTrackSettings.prototype.saturation;

/** @type {number} */
MediaTrackSettings.prototype.sharpness;

/** @type {number} */
MediaTrackSettings.prototype.zoom;

/** @type {boolean} */
MediaTrackSettings.prototype.torch;

/** @type {boolean|undefined} */
MediaTrackSettings.prototype.backgroundBlur;

/**
 * @interface
 * @see https://w3c.github.io/mediacapture-main/#media-track-supported-constraints
 * @see https://w3c.github.io/mediacapture-screen-share/#extensions-to-mediatracksupportedconstraints
 * @see https://www.w3.org/TR/screen-capture
 */
function MediaTrackSupportedConstraints() {}

/** @type {boolean|undefined} */
MediaTrackSupportedConstraints.prototype.width;

/** @type {boolean|undefined} */
MediaTrackSupportedConstraints.prototype.height;

/** @type {boolean|undefined} */
MediaTrackSupportedConstraints.prototype.aspectRatio;

/** @type {boolean|undefined} */
MediaTrackSupportedConstraints.prototype.frameRate;

/** @type {boolean|undefined} */
MediaTrackSupportedConstraints.prototype.facingMode;

/** @type {boolean|undefined} */
MediaTrackSupportedConstraints.prototype.resizeMode;

/** @type {boolean|undefined} */
MediaTrackSupportedConstraints.prototype.volume;

/** @type {boolean|undefined} */
MediaTrackSupportedConstraints.prototype.sampleRate;

/** @type {boolean|undefined} */
MediaTrackSupportedConstraints.prototype.sampleSize;

/** @type {boolean|undefined} */
MediaTrackSupportedConstraints.prototype.echoCancellation;

/** @type {boolean|undefined} */
MediaTrackSupportedConstraints.prototype.autoGainControl;

/** @type {boolean|undefined} */
MediaTrackSupportedConstraints.prototype.noiseSuppression;

/** @type {boolean|undefined} */
MediaTrackSupportedConstraints.prototype.latency;

/** @type {boolean|undefined} */
MediaTrackSupportedConstraints.prototype.channelCount;

/** @type {boolean|undefined} */
MediaTrackSupportedConstraints.prototype.deviceId;

/** @type {boolean|undefined} */
MediaTrackSupportedConstraints.prototype.groupId;

/** @type {boolean|undefined} */
MediaTrackSupportedConstraints.prototype.displaySurface;

/** @type {boolean|undefined} */
MediaTrackSupportedConstraints.prototype.logicalSurface;

/** @type {boolean|undefined} */
MediaTrackSupportedConstraints.prototype.cursor;

/** @type {boolean|undefined} */
MediaTrackSupportedConstraints.prototype.restrictOwnAudio;

/** @type {boolean|undefined} */
MediaTrackSupportedConstraints.prototype.suppressLocalAudioPlayback;

/** @type {boolean|undefined} */
MediaTrackSupportedConstraints.prototype.backgroundBlur;

/**
 * @constructor
 * @implements {EventTarget}
 * @see https://www.w3.org/TR/mediacapture-streams/#mediastreamtrack
 */
function MediaStreamTrack() {}

/**
 * @const {string}
 */
MediaStreamTrack.prototype.kind;

/**
 * @const {string}
 */
MediaStreamTrack.prototype.id;

/**
 * @const {string}
 */
MediaStreamTrack.prototype.label;

/**
 * @type {boolean}
 */
MediaStreamTrack.prototype.enabled;

/**
 * @const {boolean}
 */
MediaStreamTrack.prototype.muted;

/**
 * @type {string}
 * @see https://crbug.com/653531
 * @see https://wicg.github.io/mst-content-hint/
 */
MediaStreamTrack.prototype.contentHint;

/**
 * @const {boolean}
 */
MediaStreamTrack.prototype.remote;

/**
 * @const {!MediaStreamTrackState}
 * Read only.
 */
MediaStreamTrack.prototype.readyState;

/**
 * @type {?function(!Event)}
 */
MediaStreamTrack.prototype.onmute;

/**
 * @type {?function(!Event)}
 */
MediaStreamTrack.prototype.onunmute;

/**
 * @type {?function(!Event)}
 */
MediaStreamTrack.prototype.onended;

/**
 * @type {?function(!Event)}
 */
MediaStreamTrack.prototype.onoverconstrained;

/**
 * Applies the specified set of constraints to the track, if any specified; or
 * if no constraints are specified, removes all constraints from the track.
 *
 * @param {MediaTrackConstraints=} constraints Constraints to apply to the
 *   track.
 * @return {!Promise<void>} A |Promise| that is resolved when the constraints
 *   have been applied, or rejected if there was an error applying the
 *   constraints.
 */
MediaStreamTrack.prototype.applyConstraints = function(constraints) {};

/**
 * @return {!MediaStreamTrack}
 */
MediaStreamTrack.prototype.clone = function() {};

/** @return {void} */
MediaStreamTrack.prototype.stop = function() {};

/** @return {!MediaTrackCapabilities} */
MediaStreamTrack.prototype.getCapabilities = function() {};

/** @return {!MediaTrackConstraints} */
MediaStreamTrack.prototype.getConstraints = function() {};

/** @return {!MediaTrackSettings} */
MediaStreamTrack.prototype.getSettings = function() {};

/** @override */
MediaStreamTrack.prototype.addEventListener = function(
    type, listener, opt_options) {};

/** @override */
MediaStreamTrack.prototype.removeEventListener = function(
    type, listener, opt_options) {};

/**
 * @override
 * @return {boolean}
 */
MediaStreamTrack.prototype.dispatchEvent = function(evt) {};

/**
 * @typedef {{track: MediaStreamTrack}}
 */
var MediaStreamTrackEventInit;


/**
 * @param {string} type
 * @param {!MediaStreamTrackEventInit} eventInitDict
 * @constructor
 * @extends {Event}
 * @see https://www.w3.org/TR/mediacapture-streams/#mediastreamtrackevent
 */
function MediaStreamTrackEvent(type, eventInitDict) {}

/**
 * @const {!MediaStreamTrack}
 */
MediaStreamTrackEvent.prototype.track;

/**
 * @param {!MediaStream|!Array<!MediaStreamTrack>=} streamOrTracks
 * @constructor
 * @implements {EventTarget}
 * @see https://www.w3.org/TR/mediacapture-streams/#mediastream
 */
function MediaStream(streamOrTracks) {}

/**
 * @override
 */
MediaStream.prototype.addEventListener = function(
    type, listener, opt_useCapture) {};

/**
 * @override
 */
MediaStream.prototype.removeEventListener = function(
    type, listener, opt_useCapture) {};

/**
 * @override
 * @return {boolean}
 */
MediaStream.prototype.dispatchEvent = function(evt) {};

/**
 * TODO(bemasc): Remove this property.
 * @deprecated
 * @const {string}
 */
MediaStream.prototype.label;

/**
 * @const {string}
 */
MediaStream.prototype.id;

/**
 * @return {!Array<!MediaStreamTrack>}
 */
MediaStream.prototype.getAudioTracks = function() {};

/**
 * @return {!Array<!MediaStreamTrack>}
 */
MediaStream.prototype.getVideoTracks = function() {};

/**
 * @return {!Array<!MediaStreamTrack>}
 */
MediaStream.prototype.getTracks = function() {};

/**
 * @param {string} trackId
 * @return {MediaStreamTrack}
 */
MediaStream.prototype.getTrackById = function(trackId) {};

/**
 * @param {!MediaStreamTrack} track
 * @return {undefined}
 */
MediaStream.prototype.addTrack = function(track) {};

/**
 * @param {!MediaStreamTrack} track
 * @return {undefined}
 */
MediaStream.prototype.removeTrack = function(track) {};

/**
 * @return {!MediaStream}
 */
MediaStream.prototype.clone = function() {};

/**
 * @deprecated
 * @type {boolean}
 */
MediaStream.prototype.ended;

/**
 * @deprecated
 * @type {?function(!Event)}
 */
MediaStream.prototype.onended;

/**
 * @type {boolean}
 */
MediaStream.prototype.active;

/**
 * @type {?function(!Event)}
 */
MediaStream.prototype.onactive;

/**
 * @type {?function(!Event)}
 */
MediaStream.prototype.oninactive;

/**
 * @type {?function(!MediaStreamTrackEvent)}
 */
MediaStream.prototype.onaddtrack;

/**
 * @type {?function(!MediaStreamTrackEvent)}
 */
MediaStream.prototype.onremovetrack;

/**
 * @deprecated
 * TODO(bemasc): Remove this method once browsers have updated to
 * MediaStreamTrack.stop().
 * @return {undefined}
 */
MediaStream.prototype.stop = function() {};

/**
 * @param {string} constraint
 * @param {string=} message
 * @constructor
 * @extends {Error}
 * @see https://www.w3.org/TR/mediacapture-streams/#overconstrainederror-interface
 */
function OverconstrainedError(constraint, message) {}

/**
 * @const {string}
 * Read only.
 */
OverconstrainedError.prototype.constraint;

/**
 * @typedef {{tone: string}}
 * @see https://www.w3.org/TR/webrtc/#dom-rtcdtmftonechangeeventinit
 */
var RTCDTMFToneChangeEventInit;


/**
 * @param {string} type
 * @param {!RTCDTMFToneChangeEventInit} eventInitDict
 * @constructor
 * @extends {Event}
 * @see https://www.w3.org/TR/webrtc/#dom-rtcdtmftonechangeevent
 */
function RTCDTMFToneChangeEvent(type, eventInitDict) {}

/**
 * @const {string}
 */
RTCDTMFToneChangeEvent.prototype.tone;

/**
 * @interface
 * @see https://www.w3.org/TR/webrtc-encoded-transform/#RTCEncodedFrameMetadata
 */
function RTCEncodedFrameMetadata() {}

/** @type {!Array<number>|undefined} */
RTCEncodedFrameMetadata.prototype.contributingSources;

/** @type {string|undefined} */
RTCEncodedFrameMetadata.prototype.mimeType;

/** @type {number|undefined} */
RTCEncodedFrameMetadata.prototype.payloadType;

/** @type {number|undefined} */
RTCEncodedFrameMetadata.prototype.rtpTimestamp;

/** @type {number|undefined} */
RTCEncodedFrameMetadata.prototype.synchronizationSource;

/**
 * @interface
 * @extends {RTCEncodedFrameMetadata}
 * @see https://developer.mozilla.org/en-US/docs/Web/API/RTCEncodedVideoFrame/getMetadata
 * @see https://www.w3.org/TR/webrtc-encoded-transform/#RTCEncodedVideoFrameMetadata
 */
function RTCEncodedVideoFrameMetadata() {}

/** @type {!Array<number>|undefined} */
RTCEncodedVideoFrameMetadata.prototype.dependencies;

/** @type {number|undefined} */
RTCEncodedVideoFrameMetadata.prototype.frameId;

/** @type {number|undefined} */
RTCEncodedVideoFrameMetadata.prototype.height;

/** @type {number|undefined} */
RTCEncodedVideoFrameMetadata.prototype.spatialIndex;

/** @type {number|undefined} */
RTCEncodedVideoFrameMetadata.prototype.temporalIndex;

/** @type {number|undefined} */
RTCEncodedVideoFrameMetadata.prototype.timestamp;

/** @type {number|undefined} */
RTCEncodedVideoFrameMetadata.prototype.width;

/**
 * @constructor
 * @see https://developer.mozilla.org/docs/Web/API/RTCEncodedVideoFrame
 */
function RTCEncodedVideoFrame() {}

/**
 * @const {!ArrayBuffer}
 */
RTCEncodedVideoFrame.prototype.data;

/**
 * @const {number}
 */
RTCEncodedVideoFrame.prototype.timestamp;


/**
 * @const {string}
 */
RTCEncodedVideoFrame.prototype.type;


/**
 * @return {!RTCEncodedVideoFrameMetadata}
 */
RTCEncodedVideoFrame.prototype.getMetadata = function() {};


/**
 * @interface
 * @extends {RTCEncodedFrameMetadata}
 * @see https://developer.mozilla.org/docs/Web/API/RTCEncodedAudioFrame/getMetadata
 * @see https://www.w3.org/TR/webrtc-encoded-transform/#RTCEncodedAudioFrameMetadata
 */
function RTCEncodedAudioFrameMetadata() {}

/** @type {number|undefined} */
RTCEncodedAudioFrameMetadata.prototype.sequenceNumber;


/**
 * @constructor
 * @see https://developer.mozilla.org/docs/Web/API/RTCEncodedAudioFrame
 */
function RTCEncodedAudioFrame() {}

/**
 * @const {!ArrayBuffer}
 */
RTCEncodedAudioFrame.prototype.data;

/**
 * @const {number}
 */
RTCEncodedAudioFrame.prototype.timestamp;

/**
 * @return {!RTCEncodedAudioFrameMetadata}
 */
RTCEncodedAudioFrame.prototype.getMetadata = function() {};


/**
 * @interface
 * @see https://www.w3.org/TR/webrtc/#rtcdtmfsender
 */
function RTCDTMFSender() {}

/**
 * @param {string} tones
 * @param {number=} opt_duration
 * @param {number=} opt_interToneGap
 */
RTCDTMFSender.prototype.insertDTMF = function(
    tones, opt_duration, opt_interToneGap) {};

/**
 * @type {?boolean}
 */
RTCDTMFSender.prototype.canInsertDTMF;

/**
 * @type {?function(!RTCDTMFToneChangeEvent)}
 */
RTCDTMFSender.prototype.ontonechange;

/**
 * @const {string}
 */
RTCDTMFSender.prototype.toneBuffer;


/**
 * @typedef {{
 *   mimeType: string,
 *   clockRate: number,
 *   channels: (number|undefined),
 *   sdpFmtpLine: (string|undefined),
 * }}
 *
 * @see https://www.w3.org/TR/webrtc/#dom-rtcrtpcodeccapability
 */
var RTCRtpCodecCapability;


/**
 * @typedef {{
 *   uri: string,
 * }}
 *
 * @see https://www.w3.org/TR/webrtc/#dom-rtcrtpheaderextensioncapability
 */
var RTCRtpHeaderExtensionCapability;


/**
 * @typedef {{
 *   codecs: !Array<!RTCRtpCodecCapability>,
 *   headerExtensions: !Array<!RTCRtpHeaderExtensionCapability>,
 * }}
 *
 * @see https://www.w3.org/TR/webrtc/#dom-rtcrtpcapabilities
 */
var RTCRtpCapabilities;


/**
 * @record
 * @see https://www.w3.org/TR/webrtc/#dom-rtcrtpheaderextensionparameters
 */
function RTCRtpHeaderExtensionParameters() {}

/** @type {string} */
RTCRtpHeaderExtensionParameters.prototype.uri;

/** @type {number} */
RTCRtpHeaderExtensionParameters.prototype.id;

/** @type {boolean|undefined} */
RTCRtpHeaderExtensionParameters.prototype.encrypted;


/**
 * @record
 * @see https://www.w3.org/TR/webrtc/#dom-rtcrtcpparameters
 */
function RTCRtcpParameters() {}

/** @type {string|undefined} */
RTCRtcpParameters.prototype.cname;

/** @type {boolean|undefined} */
RTCRtcpParameters.prototype.reducedSize;


/**
 * @record
 * @see https://www.w3.org/TR/webrtc/#dom-rtcrtpcodecparameters
 */
function RTCRtpCodecParameters() {}

/** @type {number} */
RTCRtpCodecParameters.prototype.cname;

/** @type {string} */
RTCRtpCodecParameters.prototype.mimeType;

/** @type {number} */
RTCRtpCodecParameters.prototype.clockRate;

/** @type {number} */
RTCRtpCodecParameters.prototype.channels;

/** @type {string|undefined} */
RTCRtpCodecParameters.prototype.sdpFmtpLine;


/**
 * @record
 * @see https://www.w3.org/TR/webrtc/#dom-rtcrtpparameters
 */
function RTCRtpParameters() {}

/**
 * @type {!Array<!RTCRtpHeaderExtensionParameters>}
 */
RTCRtpParameters.prototype.headerExtensions;

/**
 * @type {!RTCRtcpParameters}
 */
RTCRtpParameters.prototype.rtcp;

/**
 * @type {!Array<!RTCRtpCodecParameters>}
 */
RTCRtpParameters.prototype.codecs;


/**
 * @record
 * @extends {RTCRtpParameters}
 * @see https://www.w3.org/TR/webrtc/#dom-rtcrtpsendparameters
 */
function RTCRtpSendParameters() {}

/**
 * @type {string}
 */
RTCRtpSendParameters.prototype.transactionId;

/**
 * @type {!Array<!RTCRtpEncodingParameters>}
 */
RTCRtpSendParameters.prototype.encodings;

/**
 * Possible string values are "maintain-framerate", "maintain-resolution", and
 * "balanced".
 * @type {string|undefined}
 */
RTCRtpSendParameters.prototype.degradationPreference;


/**
 * @record
 * @extends {RTCRtpParameters}
 * @see https://www.w3.org/TR/webrtc/#dom-rtcrtpreceiveparameters
 */
function RTCRtpReceiveParameters() {}

/**
 * @constructor
 * @param {!Worker} worker
 * @param {?=} options
 * @param {!Array<?>=} transfer
 */
function RTCRtpScriptTransform(worker, options, transfer) {}

/**
 * @constructor
 * @see https://www.w3.org/TR/webrtc/#rtcrtpsender-interface
 */
function RTCRtpSender() {}

/**
 * @const {!RTCDTMFSender}
 */
RTCRtpSender.prototype.dtmf;

/**
 * @const {?MediaStreamTrack}
 */
RTCRtpSender.prototype.track;

/**
 * @const {?RTCDtlsTransport}
 */
RTCRtpSender.prototype.transport;

/**
 * @const {?RTCRtpScriptTransform}
 */
RTCRtpSender.prototype.transform;

/**
 * @param {?MediaStreamTrack} track
 * @return {!Promise<void>}
 * @see https://www.w3.org/TR/webrtc/#dom-rtcrtpsender
 */
RTCRtpSender.prototype.replaceTrack = function(track) {};

/**
 * @return {!RTCRtpSendParameters}
 */
RTCRtpSender.prototype.getParameters = function() {};

/**
 * @param {!RTCRtpSendParameters} params
 * @return {!Promise<undefined>}
 */
RTCRtpSender.prototype.setParameters = function(params) {};

/**
 * @param {...!MediaStream} streams
 * @return {undefined}
 */
RTCRtpSender.prototype.setStreams = function(streams) {};

/**
 * @return {!Promise<!RTCStatsReport>}
 */
RTCRtpSender.prototype.getStats = function() {};

/**
 * @param {string} kind
 * @return {?RTCRtpCapabilities}
 */
RTCRtpSender.getCapabilities = function(kind) {};


/**
 * @interface
 * @see https://www.w3.org/TR/webrtc/#dom-rtcrtpcontributingsource
 */
function RTCRtpContributingSource() {}

/**
 * @type {?number}
 */
RTCRtpContributingSource.prototype.source;

/**
 * @type {?Date|number}
 */
RTCRtpContributingSource.prototype.timestamp;

/**
 * @type {number|undefined}
 */
RTCRtpContributingSource.prototype.audioLevel;

/**
 * This is a relatively new field and browsers may not yet be compliant to the
 * spec.
 * @type {?number}
 * @see https://w3c.github.io/webrtc-pc/#dom-rtcrtpcontributingsource-rtptimestamp
 */
RTCRtpContributingSource.prototype.rtpTimestamp;

/**
 * This is a relatively new field and browsers may not yet be compliant to the
 * spec.
 * @type {number|undefined}
 * @see https://w3c.github.io/webrtc-extensions/#dom-rtcrtpcontributingsource-capturetimestamp
 */
RTCRtpContributingSource.prototype.captureTimestamp;

/**
 * This is a relatively new field and browsers may not yet be compliant to the
 * spec.
 * @type {number|undefined}
 * @see https://w3c.github.io/webrtc-extensions/#dom-rtcrtpcontributingsource-sendercapturetimeoffset
 */
RTCRtpContributingSource.prototype.senderCaptureTimeOffset;

/**
 * @constructor
 * @see https://www.w3.org/TR/webrtc/#rtcrtpreceiver-interface
 */
function RTCRtpReceiver() {}

/** @type {number|undefined}*/
RTCRtpReceiver.prototype.jitterBufferTarget;

/**
 * @const {!MediaStreamTrack}
 */
RTCRtpReceiver.prototype.track;

/**
 * @const {?RTCDtlsTransport}
 */
RTCRtpReceiver.prototype.transport;

/** @type {?RTCRtpScriptTransform} */
RTCRtpReceiver.prototype.transform;

/**
 * @return {!RTCRtpReceiveParameters}
 */
RTCRtpReceiver.prototype.getParameters = function() {};

/**
 * @return {!Array<!RTCRtpContributingSource>}
 */
RTCRtpReceiver.prototype.getContributingSources = function() {};

/**
 * @return {!Array<!RTCRtpContributingSource>}
 */
RTCRtpReceiver.prototype.getSynchronizationSources = function() {};


/**
 * @return {!Promise<!RTCStatsReport>}
 */
RTCRtpReceiver.prototype.getStats = function() {};

/**
 * Chrome exclusive hint to control jitter buffer delay. Measured in seconds.
 * @see https://henbos.github.io/webrtc-extensions/#dfn-playoutdelayhint
 * @type {?number|undefined}
 */
RTCRtpReceiver.prototype.playoutDelayHint;

/**
 * Get most optimistic view of the capabilities of the system for sending media
 * of the given kind.
 * @see https://www.w3.org/TR/webrtc/#dom-rtcrtpreceiver-getcapabilities
 * @param {!string} kind Media kind: 'video' or 'audio'.
 * @return {!RTCRtpCapabilities}
 */
RTCRtpReceiver.getCapabilities = function(kind) {};

/**
 * @see https://www.w3.org/TR/webrtc/#dom-rtcrtptransceiverinit
 * @record
 */
function RTCRtpTransceiverInit() {}

/**
 * The direction of the `RTCRtpTransceiver`. Defaults to "sendrecv".
 * @type {?RTCRtpTransceiverDirection|undefined}
 */
RTCRtpTransceiverInit.prototype.direction;

/**
 * The streams to add to the tranceiver's sender.
 * @type {?Array<!MediaStream>|undefined}
 */
RTCRtpTransceiverInit.prototype.streams;

/**
 * @type {?Array<!RTCRtpEncodingParameters>|undefined}
 */
RTCRtpTransceiverInit.prototype.sendEncodings;

/**
 * @see https://www.w3.org/TR/webrtc/#dom-rtcrtpencodingparameters
 * @record
 */
function RTCRtpEncodingParameters() {}

/**
 * @type {?number|undefined}
 */
RTCRtpEncodingParameters.prototype.codecPayloadType;

/**
 * Possible values are "disabled" and "enabled".
 * @type {?string|undefined}
 */
RTCRtpEncodingParameters.prototype.dtx;

/**
 * @type {?boolean|undefined}
 */
RTCRtpEncodingParameters.prototype.active;

/**
 * Possible values are "very-low", "low" (default), "medium", and "high".
 * @type {?string|undefined}
 */
RTCRtpEncodingParameters.prototype.priority;

/**
 * Possible values are "very-low", "low" (default), "medium", and "high".
 * @see https://w3c.github.io/webrtc-dscp-exp/
 * @type {?string|undefined}
 */
RTCRtpEncodingParameters.prototype.networkPriority;

/**
 * @type {?number|undefined}
 */
RTCRtpEncodingParameters.prototype.ptime;

/**
 * @type {?number|undefined}
 */
RTCRtpEncodingParameters.prototype.maxBitrate;

/**
 * @type {?number|undefined}
 */
RTCRtpEncodingParameters.prototype.maxFramerate;

/**
 * @type {?string|number}
 */
RTCRtpEncodingParameters.prototype.rid;

/**
 * @type {?number|number}
 */
RTCRtpEncodingParameters.prototype.scaleResolutionDownBy;

/**
 * @see https://w3c.github.io/webrtc-extensions/#dom-rtcrtpencodingparameters-adaptiveptime
 * @type {?boolean|undefined}
 */
RTCRtpEncodingParameters.prototype.adaptivePtime;

/**
 * @interface
 * @see https://www.w3.org/TR/webrtc/#rtcrtptransceiver-interface
 */
function RTCRtpTransceiver() {}

/**
 * @const {?string}
 */
RTCRtpTransceiver.prototype.mid;

/**
 * @const {boolean}
 */
RTCRtpTransceiver.prototype.stopped;

/**
 * @type {!RTCRtpTransceiverDirection}
 */
RTCRtpTransceiver.prototype.direction;

/**
 * @const {?RTCRtpTransceiverDirection}
 */
RTCRtpTransceiver.prototype.currentDirection;

/**
 * @param {!RTCRtpTransceiverDirection} direction
 */
RTCRtpTransceiver.prototype.setDirection = function(direction) {};

/**
 */
RTCRtpTransceiver.prototype.stop = function() {};

/**
 * @const {?RTCRtpSender}
 */
RTCRtpTransceiver.prototype.sender;

/**
 * @const {?RTCRtpReceiver}
 */
RTCRtpTransceiver.prototype.receiver;

/**
 * @param {!Array<!RTCRtpCodecCapability>} codecs
 */
RTCRtpTransceiver.prototype.setCodecPreferences = function(codecs) {};

/**
 * @see https://w3c.github.io/mediacapture-main/getusermedia.html#dom-longrange
 * @record
 */
function LongRange() {}

/**
 * @type {number|undefined}
 */
LongRange.prototype.max;

/**
 * @type {number|undefined}
 */
LongRange.prototype.min;

/**
 * @see https://w3c.github.io/mediacapture-main/getusermedia.html#dom-doublerange
 * @record
 */
function DoubleRange() {}

/**
 * @type {number|undefined}
 */
DoubleRange.prototype.max;

/**
 * @type {number|undefined}
 */
DoubleRange.prototype.min;


/**
 * @see https://w3c.github.io/mediacapture-main/getusermedia.html#dom-constrainbooleanparameters
 * @record
 */
function ConstrainBooleanParameters() {}

/**
 * @type {boolean|undefined}
 */
ConstrainBooleanParameters.prototype.exact;

/**
 * @type {boolean|undefined}
 */
ConstrainBooleanParameters.prototype.ideal;

/**
 * @see https://w3c.github.io/mediacapture-main/getusermedia.html#dom-constraindomstringparameters
 * @record
 */
function ConstrainDOMStringParameters() {}

/**
 * @type {string|Array<string>|undefined}
 */
ConstrainDOMStringParameters.prototype.exact;

/**
 * @type {string|Array<string>|undefined}
 */
ConstrainDOMStringParameters.prototype.ideal;

/**
 * @see https://w3c.github.io/mediacapture-main/getusermedia.html#dom-constraindoublerange
 * @record
 * @extends {DoubleRange}
 */
function ConstrainDoubleRange() {}

/**
 * @type {number|undefined}
 */
ConstrainDoubleRange.prototype.exact;

/**
 * @type {number|undefined}
 */
ConstrainDoubleRange.prototype.ideal;


/**
 * @see https://w3c.github.io/mediacapture-main/getusermedia.html#dom-constrainlongrange
 * @record
 * @extends {LongRange}
 */
function ConstrainLongRange() {}

/**
 * @type {number|undefined}
 */
ConstrainLongRange.prototype.exact;

/**
 * @type {number|undefined}
 */
ConstrainLongRange.prototype.ideal;

/**
 * @see https://w3c.github.io/mediacapture-main/getusermedia.html#dom-constrainboolean
 * @typedef {boolean|ConstrainBooleanParameters}
 */
var ConstrainBoolean;

/**
 * @see https://w3c.github.io/mediacapture-main/getusermedia.html#dom-constraindomString
 * @typedef {string|Array<string>|ConstrainDOMStringParameters}
 */
var ConstrainDOMString;

/**
 * @see https://w3c.github.io/mediacapture-main/getusermedia.html#dom-constraindouble
 * @typedef {number|ConstrainDoubleRange}
 */
var ConstrainDouble;

/**
 * @see https://w3c.github.io/mediacapture-main/getusermedia.html#dom-constrainlong
 * @typedef {number|ConstrainLongRange}
 */
var ConstrainLong;


/**
 * @see https://w3c.github.io/mediacapture-main/getusermedia.html#dom-mediatrackconstraintset
 * @see https://w3c.github.io/mediacapture-screen-share/#extensions-to-mediatrackconstraintset
 * @see https://www.w3.org/TR/screen-capture
 * @record
 */
function MediaTrackConstraintSet() {}

/**
 * @type {ConstrainBoolean|undefined}
 */
MediaTrackConstraintSet.prototype.autoGainControl;

/**
 * @type {ConstrainDouble|undefined}
 */
MediaTrackConstraintSet.prototype.aspectRatio;

/**
 * @type {ConstrainLong|undefined}
 */
MediaTrackConstraintSet.prototype.channelCount;

/**
 * @type {ConstrainDOMString|undefined}
 */
MediaTrackConstraintSet.prototype.deviceId;

/**
 * @type {ConstrainBoolean|undefined}
 */
MediaTrackConstraintSet.prototype.echoCancellation;

/**
 * @type {ConstrainDOMString|undefined}
 */
MediaTrackConstraintSet.prototype.facingMode;

/**
 * @type {ConstrainDouble|undefined}
 */
MediaTrackConstraintSet.prototype.frameRate;

/**
 * @type {ConstrainDOMString|undefined}
 */
MediaTrackConstraintSet.prototype.groupId;

/**
 * @type {ConstrainLong|undefined}
 */
MediaTrackConstraintSet.prototype.height;

/**
 * @type {ConstrainDouble|undefined}
 */
MediaTrackConstraintSet.prototype.latency;

/**
 * @type {ConstrainBoolean|undefined}
 */
MediaTrackConstraintSet.prototype.noiseSuppression;

/**
 * @type {ConstrainDOMString|undefined}
 */
MediaTrackConstraintSet.prototype.resizeMode;

/**
 * @type {ConstrainLong|undefined}
 */
MediaTrackConstraintSet.prototype.sampleRate;

/**
 * @type {ConstrainLong|undefined}
 */
MediaTrackConstraintSet.prototype.sampleSize;

/**
 * @type {ConstrainDouble|undefined}
 */
MediaTrackConstraintSet.prototype.volume;

/**
 * @type {ConstrainLong|undefined}
 */
MediaTrackConstraintSet.prototype.width;

/** @type {ConstrainDOMString|undefined} */
MediaTrackConstraintSet.prototype.displaySurface;

/** @type {ConstrainBoolean|undefined} */
MediaTrackConstraintSet.prototype.logicalSurface;

/** @type {ConstrainDOMString|undefined} */
MediaTrackConstraintSet.prototype.cursor;

/** @type {ConstrainBoolean|undefined} */
MediaTrackConstraintSet.prototype.restrictOwnAudio;

/** @type {ConstrainBoolean|undefined} */
MediaTrackConstraintSet.prototype.suppressLocalAudioPlayback;

/** @type {ConstrainBoolean|undefined} */
MediaTrackConstraintSet.prototype.backgroundBlur;

/**
 * @record
 * @extends {MediaTrackConstraintSet}
 */
function MediaTrackConstraints() {}

/**
 * @type {Array<!MediaTrackConstraintSet>|undefined}
 */
MediaTrackConstraints.prototype.advanced;

/**
 * @see https://w3c.github.io/mediacapture-main/getusermedia.html#media-track-constraints
 * @record
 */
function MediaStreamConstraints() {}

/**
 * @type {boolean|MediaTrackConstraints|undefined}
 */
MediaStreamConstraints.prototype.audio;

/**
 * @type {boolean|MediaTrackConstraints|undefined}
 */
MediaStreamConstraints.prototype.video;

/**
 * @see https://wicg.github.io/prefer-current-tab/
 * @type {boolean|undefined}
 */
MediaStreamConstraints.prototype.preferCurrentTab;

/**
 * @type {string|undefined}
 */
MediaStreamConstraints.prototype.peerIdentity;

/**
 * @constructor
 * @see https://w3c.github.io/mediacapture-screen-share/#dom-capturecontroller
 */
function CaptureController() {}

/**
 * @param {string} focusBehavior
 * @return {undefined}
 * @see https://w3c.github.io/mediacapture-screen-share/#dom-capturestartfocusbehavior
 */
CaptureController.prototype.setFocusBehavior = function(focusBehavior) {};

/**
 * @see https://w3c.github.io/mediacapture-screen-share/#dom-displaymediastreamoptions
 * @record
 */
function DisplayMediaStreamOptions() {}

/**
 * @type {boolean|MediaTrackConstraints|undefined}
 */
DisplayMediaStreamOptions.prototype.audio;

/**
 * @type {boolean|MediaTrackConstraints|undefined}
 */
DisplayMediaStreamOptions.prototype.video;

/**
 * @type {!CaptureController|undefined}
 */
DisplayMediaStreamOptions.prototype.controller;

/**
 * @see https://w3c.github.io/mediacapture-screen-share/#dom-selfcapturepreferenceenum
 * @type {string|undefined}
 */
DisplayMediaStreamOptions.prototype.selfBrowserSurface;

/**
 * @see https://w3c.github.io/mediacapture-screen-share/#dom-surfaceswitchingpreferenceenum
 * @type {string|undefined}
 */
DisplayMediaStreamOptions.prototype.surfaceSwitching;

/**
 * @see https://w3c.github.io/mediacapture-screen-share/#dom-systemaudiopreferenceenum
 * @type {string|undefined}
 */
DisplayMediaStreamOptions.prototype.systemAudio;

/**
 * @see https://wicg.github.io/prefer-current-tab/
 * @type {boolean|undefined}
 */
DisplayMediaStreamOptions.prototype.preferCurrentTab;

/**
 * @see {http://dev.w3.org/2011/webrtc/editor/getusermedia.html#
 *     navigatorusermediaerror-and-navigatorusermediaerrorcallback}
 * @interface
 */
function NavigatorUserMediaError() {}

/**
 * @const {number}
 * @deprecated Removed from the standard and some browsers.
 */
NavigatorUserMediaError.prototype.PERMISSION_DENIED;

/**
 * @type {number}
 * @deprecated Removed from the standard and some browsers.
 * Read only.
 */
NavigatorUserMediaError.prototype.code;

/**
 * @type {string}
 * Read only.
 */
NavigatorUserMediaError.prototype.name;

/**
 * @type {?string}
 * Read only.
 */
NavigatorUserMediaError.prototype.message;

/**
 * @type {?string}
 * Read only.
 */
NavigatorUserMediaError.prototype.constraintName;

/**
 * @param {string} type
 * @param {!Object} eventInitDict
 * @constructor
 */
function MediaStreamEvent(type, eventInitDict) {}

/**
 * @const {?MediaStream}
 */
MediaStreamEvent.prototype.stream;

/**
 * @record
 * @see https://www.w3.org/TR/mediastream-recording/#dictdef-mediarecorderoptions
 */
function MediaRecorderOptions() {}

/** @type {(string|undefined)} */
MediaRecorderOptions.prototype.mimeType

/** @type {(number|undefined)} */
MediaRecorderOptions.prototype.audioBitsPerSecond

/** @type {(number|undefined)} */
MediaRecorderOptions.prototype.videoBitsPerSecond

/** @type {(number|undefined)} */
MediaRecorderOptions.prototype.bitsPerSecond

/**
 * @see https://www.w3.org/TR/mediastream-recording/#mediarecorder-api
 * @param {!MediaStream} stream
 * @param {MediaRecorderOptions=} options
 * @implements {EventTarget}
 * @constructor
 */
function MediaRecorder(stream, options) {}

/**
 * @override
 */
MediaRecorder.prototype.addEventListener = function(
    type, listener, opt_useCapture) {};

/**
 * @override
 */
MediaRecorder.prototype.removeEventListener = function(
    type, listener, opt_useCapture) {};

/**
 * @override
 * @return {boolean}
 */
MediaRecorder.prototype.dispatchEvent = function(evt) {};

/**
 * @type {!MediaStream}
 */
MediaRecorder.prototype.stream;

/**
 * @type {string}
 */
MediaRecorder.prototype.mimeType;

/**
 * @type {string}
 */
MediaRecorder.prototype.state;

/**
 * @type {(function(!Event)|undefined)}
 */
MediaRecorder.prototype.onstart;

/**
 * @type {(function(!Event)|undefined)}
 */
MediaRecorder.prototype.onstop;

/**
 * @type {(function(!Event)|undefined)}
 */
MediaRecorder.prototype.ondataavailable;

/**
 * @type {(function(!Event)|undefined)}
 */
MediaRecorder.prototype.onpause;

/**
 * @type {(function(!Event)|undefined)}
 */
MediaRecorder.prototype.onresume;

/**
 * @type {(function(!Event)|undefined)}
 */
MediaRecorder.prototype.onerror;

/**
 * @type {number}
 */
MediaRecorder.prototype.videoBitsPerSecond;

/**
 * @type {number}
 */
MediaRecorder.prototype.audioBitsPerSecond;

/**
 * @param {number=} timeslice
 */
MediaRecorder.prototype.start = function(timeslice) {};

/** @return {void} */
MediaRecorder.prototype.stop = function() {};

/** @return {void} */
MediaRecorder.prototype.pause = function() {};

/** @return {void} */
MediaRecorder.prototype.resume = function() {};

/** @return {void} */
MediaRecorder.prototype.requestData = function() {};

/**
 * @param {string} type
 * @return {boolean}
 */
MediaRecorder.isTypeSupported = function(type) {};

/**
 * @see https://developer.mozilla.org/en-US/docs/Web/API/MediaRecorderErrorEvent
 * @interface
 */
function MediaRecorderErrorEvent() {}

/**
 * @type {DOMException} type
 */
MediaRecorderErrorEvent.prototype.error;

/**
 * @interface
 */
function MediaRecorderEventMap() {}

/** @type {BlobEvent} */
MediaRecorderEventMap.prototype.dataavailable;

/** @type {Event} */
MediaRecorderEventMap.prototype.error;

/** @type {Event} */
MediaRecorderEventMap.prototype.pause;

/** @type {Event} */
MediaRecorderEventMap.prototype.resume;

/** @type {Event} */
MediaRecorderEventMap.prototype.start;

/** @type {Event} */
MediaRecorderEventMap.prototype.stop;

/**
 * @constructor
 * @extends {Event}
 * @param {string} type
 * @param {{data: !Blob, timecode: (number|undefined)}} eventInitDict
 * @see https://www.w3.org/TR/mediastream-recording/#blobevent-section
 */
function BlobEvent(type, eventInitDict) {}

/** @type {!Blob} */
BlobEvent.prototype.data;

/** @type {number} */
BlobEvent.prototype.timecode;

/**
 * @interface
 * @see https://w3c.github.io/mediacapture-image/##photosettings-section
 */
function PhotoSettings() {}

/**
 * @type {string}
 */
PhotoSettings.prototype.fillLightMode;

/**
 * @type {number}
 */
PhotoSettings.prototype.imageHeight;

/**
 * @type {number}
 */
PhotoSettings.prototype.imageWidth;

/**
 * @type {boolean}
 */
PhotoSettings.prototype.redEyeReduction;

/**
 * @interface
 * @see https://w3c.github.io/mediacapture-image/##photocapabilities-section
 */
function PhotoCapabilities() {}

/**
 * @const {string}
 */
PhotoCapabilities.prototype.redEyeReduction;

/**
 * @const {!MediaSettingsRange}
 */
PhotoCapabilities.prototype.imageHeight;

/**
 * @const {!MediaSettingsRange}
 */
PhotoCapabilities.prototype.imageWidth;

/**
 * @const {!Array<string>}
 */
PhotoCapabilities.prototype.fillLightMode;

/**
 * @see https://w3c.github.io/mediacapture-image/
 * @param {!MediaStreamTrack} videoTrack
 * @constructor
 */
function ImageCapture(videoTrack) {}

/**
 * @param {!PhotoSettings=} photoSettings
 * @return {!Promise<!Blob>}
 */
ImageCapture.prototype.takePhoto = function(photoSettings) {};

/**
 * @return {!Promise<!PhotoCapabilities>}
 */
ImageCapture.prototype.getPhotoCapabilities = function() {};

/**
 * @return {!Promise<!ImageBitmap>}
 */
ImageCapture.prototype.grabFrame = function() {};

/**
 * @const {!MediaStreamTrack}
 */
ImageCapture.prototype.track;

/**
 * @see https://www.w3.org/TR/webrtc/#rtctrackevent
 * @param {string} type
 * @param {!Object} eventInitDict
 * @constructor
 */
function RTCTrackEvent(type, eventInitDict) {}

/**
 * @const {!RTCRtpReceiver}
 */
RTCTrackEvent.prototype.receiver;

/**
 * @const {!MediaStreamTrack}
 */
RTCTrackEvent.prototype.track;

/**
 * @const {!Array<!MediaStream>}
 */
RTCTrackEvent.prototype.streams;

/**
 * @const {!RTCRtpTransceiver}
 */
RTCTrackEvent.prototype.transceiver;

/**
 * @typedef {string}
 * @see https://www.w3.org/TR/mediacapture-streams/#idl-def-MediaDeviceKind
 * In WebIDL this is an enum with values 'audioinput', 'audiooutput', and
 * 'videoinput', but there is no mechanism in Closure for describing a
 * specialization of the string type.
 */
var MediaDeviceKind;

/**
 * Possible values are "sendrecv", "sendonly", "recvonly", and "inactive".
 * @typedef {string}
 * @see https://www.w3.org/TR/webrtc/#dom-rtcrtptransceiverdirection
 */
var RTCRtpTransceiverDirection;

/**
 * @interface
 */
function MediaDeviceInfo() {}

/** @const {string} */
MediaDeviceInfo.prototype.deviceId;

/** @const {!MediaDeviceKind} */
MediaDeviceInfo.prototype.kind;

/** @const {string} */
MediaDeviceInfo.prototype.label;

/** @const {string} */
MediaDeviceInfo.prototype.groupId;

/**
 * @interface
 * @extends {MediaDeviceInfo}
 * @see https://www.w3.org/TR/mediacapture-streams/#input-specific-device-info
 */
function InputDeviceInfo() {}

/** @return {!MediaTrackCapabilities} */
InputDeviceInfo.prototype.getCapabilities = function() {};

/**
 * @interface
 * @extends {EventTarget}
 * @see https://www.w3.org/TR/mediacapture-streams/#mediadevices
 */
function MediaDevices() {}

/** @type {?function (!Event)} */
MediaDevices.prototype.ondevicechange;

/**
 * @return {!Promise<!Array<!MediaDeviceInfo>>}
 */
MediaDevices.prototype.enumerateDevices = function() {};

/**
 * @see https://developer.mozilla.org/en-US/docs/Web/API/MediaDevices/getUserMedia
 * @param {!MediaStreamConstraints} constraints
 * @return {!Promise<!MediaStream>}
 */
MediaDevices.prototype.getUserMedia = function(constraints) {};

/**
 * @see https://w3c.github.io/mediacapture-screen-share/#dom-mediadevices-getdisplaymedia
 * @param {!DisplayMediaStreamOptions=} options
 * @return {!Promise<!MediaStream>}
 */
MediaDevices.prototype.getDisplayMedia = function(options) {};

/**
 * @see https://w3c.github.io/mediacapture-main/#dom-mediadevices-getsupportedconstraints
 * @return {!MediaTrackSupportedConstraints}
 */
MediaDevices.prototype.getSupportedConstraints = function() {};

/** @const {!MediaDevices} */
Navigator.prototype.mediaDevices;

/**
 * @typedef {string}
 * @see https://www.w3.org/TR/webrtc/#rtcsdptype
 * In WebIDL this is an enum with values 'offer', 'pranswer', and 'answer',
 * but there is no mechanism in Closure for describing a specialization of
 * the string type.
 */
var RTCSdpType;

/**
 * @record
 * @see https://www.w3.org/TR/webrtc/#dom-rtcsessiondescriptioninit
 */
function RTCSessionDescriptionInit() {}

/**
 * @type {RTCSdpType|undefined}
 */
RTCSessionDescriptionInit.prototype.type;

/**
 * @type {string|undefined}
 */
RTCSessionDescriptionInit.prototype.sdp;

/**
 * @param {!RTCSessionDescriptionInit=} descriptionInitDict
 * @constructor
 * @see https://www.w3.org/TR/webrtc/#rtcsessiondescription-class
 */
function RTCSessionDescription(descriptionInitDict) {}

/**
 * @type {RTCSdpType}
 * @see https://www.w3.org/TR/webrtc/#dom-rtcsessiondescription-type
 */
RTCSessionDescription.prototype.type;

/**
 * @type {string}
 * @see https://www.w3.org/TR/webrtc/#dom-rtcsessiondescription-sdp
 */
RTCSessionDescription.prototype.sdp;

/**
 * TODO(bemasc): Remove this definition once it is removed from the browser.
 * @param {string} label The label index (audio/video/data -> 0,1,2)
 * @param {string} sdp The ICE candidate in SDP text form
 * @constructor
 */
function IceCandidate(label, sdp) {}

/**
 * @return {string}
 */
IceCandidate.prototype.toSdp = function() {};

/**
 * @type {?string}
 */
IceCandidate.prototype.label;

/** @record */
function RTCIceCandidateInit() {};

/** @type {?string|undefined} */
RTCIceCandidateInit.prototype.candidate;

/** @type {(?string|undefined)} */
RTCIceCandidateInit.prototype.sdpMid;

/** @type {(?number|undefined)} */
RTCIceCandidateInit.prototype.sdpMLineIndex;

/** @type {(string|undefined)} */
RTCIceCandidateInit.prototype.usernameFragment;

/**
 * @param {!RTCIceCandidateInit=} candidateInitDict  The RTCIceCandidateInit
 *     dictionary.
 * @constructor
 * @see https://www.w3.org/TR/webrtc/#rtcicecandidate-interface
 */
function RTCIceCandidate(candidateInitDict) {}

/** @type {string} */
RTCIceCandidate.prototype.candidate;

/** @type {?string} */
RTCIceCandidate.prototype.sdpMid;

/** @type {?number} */
RTCIceCandidate.prototype.sdpMLineIndex;

/** @type {?string} */
RTCIceCandidate.prototype.foundation;

/** @type {?string} */
RTCIceCandidate.prototype.component;

/** @type {?number} */
RTCIceCandidate.prototype.priority;

/** @type {?string} */
RTCIceCandidate.prototype.address;

/** @type {?string} */
RTCIceCandidate.prototype.protocol;

/** @type {?number} */
RTCIceCandidate.prototype.port;

/** @type {?string} */
RTCIceCandidate.prototype.type;

/** @type {?string} */
RTCIceCandidate.prototype.tcpType;

/** @type {?string} */
RTCIceCandidate.prototype.relatedAddress;

/** @type {?number} */
RTCIceCandidate.prototype.relatedPort;

/** @type {?string} */
RTCIceCandidate.prototype.usernameFragment;

/**
 * @typedef {{urls: string}|{urls: !Array<string>}}
 * @private
 * @see https://www.w3.org/TR/webrtc/#rtciceserver-dictionary
 * This dictionary type also has an optional key {credential: ?string}.
 */
var RTCIceServerRecord_;

/**
 * @interface
 * @private
 */
function RTCIceServerInterface_() {}

/**
 * @type {string|!Array<string>}
 */
RTCIceServerInterface_.prototype.urls;

/**
 * @type {?string}
 */
RTCIceServerInterface_.prototype.username;

/**
 * @type {?string}
 */
RTCIceServerInterface_.prototype.credential;

/**
 * This type, and several below it, are constructed as unions between records
 *
 * @typedef {RTCIceServerRecord_|RTCIceServerInterface_}
 * @private
 */
var RTCIceServer;

/**
 * @record
 * @see https://www.w3.org/TR/webrtc/#dom-rtcconfiguration
 */
function RTCConfiguration() {}

/**
 * @type {!Array<!RTCIceServer>}
 */
RTCConfiguration.prototype.iceServers;

/**
 * Allows specifying the ICE transport policy. Valid values are "all" and
 * "relay", with "all" being the default.
 * @type {string|undefined}
 */
RTCConfiguration.prototype.iceTransportPolicy;

/**
 * Indicates which media-bundling policy to use when gathering ICE candidates.
 * Valid values are "balanced", "max-compat" and "max-bundle", with "balanced"
 * being the default.
 * @type {string|undefined}
 */
RTCConfiguration.prototype.bundlePolicy;

/**
 * Indicates which rtcp-mux policy to use when gathering ICE candidates. The
 * only valid value is "require".
 * @type {string|undefined}
 */
RTCConfiguration.prototype.rtcpMuxPolicy;

/** @type {!Array<!RTCCertificate>|undefined} */
RTCConfiguration.prototype.certificates;

/** @type {number|undefined} */
RTCConfiguration.prototype.iceCandidatePoolSize;

/**
 * Allows specifying the SDP semantics. Valid values are "plan-b" and
 * "unified-plan".
 *
 * @see {@link https://webrtc.org/web-apis/chrome/unified-plan/}
 * @type {string|undefined}
 */
RTCConfiguration.prototype.sdpSemantics;

/**
 * @typedef {function(!RTCSessionDescription)}
 */
var RTCSessionDescriptionCallback;

/**
 * @typedef {function(string)}
 */
var RTCPeerConnectionErrorCallback;

/**
 * @typedef {function()}
 */
var RTCVoidCallback;

/**
 * @typedef {string}
 */
var RTCDtlsRole;

/**
 * @typedef {string}
 */
var RTCSignalingState;

/**
 * @typedef {string}
 */
var RTCIceConnectionState;

/**
 * @typedef {string}
 */
var RTCIceGatheringState;

/**
 * @typedef {string}
 */
var RTCIceRole;

/**
 * @typedef {string}
 */
var RTCIceTransportState;

/**
 * @see https://www.w3.org/TR/webrtc/#rtcpeerconnectionstate-enum
 * @typedef {string}
 */
var RTCPeerConnectionState;

/**
 * @typedef {string}
 */
var RTCQualityLimitationReason;

/**
 * @see https://www.w3.org/TR/webrtc/#dom-rtcpeerconnectioniceevent
 * @param {string} type
 * @param {!Object} eventInitDict
 * @extends {Event}
 * @constructor
 */
function RTCPeerConnectionIceEvent(type, eventInitDict) {}

/**
 * @const {RTCIceCandidate}
 */
RTCPeerConnectionIceEvent.prototype.candidate;

/**
 * @const {?string}
 */
RTCPeerConnectionIceEvent.prototype.url;

/**
 * @see https://www.w3.org/TR/webrtc/#dom-rtcpeerconnectioniceerrorevent
 * @param {string} type
 * @param {!Object} eventInitDict
 * @extends {Event}
 * @constructor
 */
function RTCPeerConnectionIceErrorEvent(type, eventInitDict) {}

/** @const {?string} */
RTCPeerConnectionIceErrorEvent.prototype.address;

/** @const {?number} */
RTCPeerConnectionIceErrorEvent.prototype.port;

/** @const {string} */
RTCPeerConnectionIceErrorEvent.prototype.url;

/** @const {number} */
RTCPeerConnectionIceErrorEvent.prototype.errorCode;

/** @const {string} */
RTCPeerConnectionIceErrorEvent.prototype.errorText;


/**
 * @constructor
 * @see https://www.w3.org/TR/webrtc/#dom-rtcicecandidatepair
 */
function RTCIceCandidatePair() {}

/** @const {!RTCIceCandidate|undefined} */
RTCIceCandidatePair.prototype.local;

/** @const {!RTCIceCandidate|undefined} */
RTCIceCandidatePair.prototype.remote;


/**
 * @constructor
 * @see https://www.