@twilio/voice-sdk
Version:
Twilio's JavaScript Voice SDK
403 lines • 28.8 kB
JavaScript
/**
* @packageDocumentation
* @module Voice
* @internalapi
*/
// @ts-nocheck
/**
* This file was imported from another project. If making changes to this file, please don't
* make them here. Make them on the linked repo below, then copy back:
* https://code.hq.twilio.com/client/MockRTCStatsReport
*/
// The legacy max volume, which is the positive half of a signed short integer.
const OLD_MAX_VOLUME = 32767;
const NativeRTCStatsReport = typeof window !== 'undefined'
? window.RTCStatsReport : undefined;
/**
* Create a MockRTCStatsReport wrapper around a Map of RTCStats objects. If RTCStatsReport is available
* natively, it will be inherited so that instanceof checks pass.
* @constructor
* @extends RTCStatsReport
* @param {Map<string, RTCStats>} statsMap - A Map of RTCStats objects to wrap
* with a MockRTCStatsReport object.
*/
function MockRTCStatsReport(statsMap) {
if (!(this instanceof MockRTCStatsReport)) {
return new MockRTCStatsReport(statsMap);
}
const self = this;
Object.defineProperties(this, {
_map: { value: statsMap },
size: {
enumerable: true,
get() {
return self._map.size;
},
},
});
this[Symbol.iterator] = statsMap[Symbol.iterator];
}
// If RTCStatsReport is available natively, inherit it. Keep our constructor.
if (NativeRTCStatsReport) {
MockRTCStatsReport.prototype = Object.create(NativeRTCStatsReport.prototype);
MockRTCStatsReport.prototype.constructor = MockRTCStatsReport;
}
// Map the Map-like read methods to the underlying Map
['entries', 'forEach', 'get', 'has', 'keys', 'values'].forEach(key => {
MockRTCStatsReport.prototype[key] = function (...args) {
return this._map[key](...args);
};
});
/**
* Convert an array of RTCStats objects into a mock RTCStatsReport object.
* @param {Array<RTCStats>}
* @return {MockRTCStatsReport}
*/
MockRTCStatsReport.fromArray = function fromArray(array) {
return new MockRTCStatsReport(array.reduce((map, rtcStats) => {
map.set(rtcStats.id, rtcStats);
return map;
}, new Map()));
};
/**
* Convert a legacy RTCStatsResponse object into a mock RTCStatsReport object.
* @param {RTCStatsResponse} statsResponse - An RTCStatsResponse object returned by the
* legacy getStats(callback) method in Chrome.
* @return {MockRTCStatsReport} A mock RTCStatsReport object.
*/
MockRTCStatsReport.fromRTCStatsResponse = function fromRTCStatsResponse(statsResponse) {
let activeCandidatePairId;
const transportIds = new Map();
const statsMap = statsResponse.result().reduce((map, report) => {
const id = report.id;
switch (report.type) {
case 'googCertificate':
map.set(id, createRTCCertificateStats(report));
break;
case 'datachannel':
map.set(id, createRTCDataChannelStats(report));
break;
case 'googCandidatePair':
if (getBoolean(report, 'googActiveConnection')) {
activeCandidatePairId = id;
}
map.set(id, createRTCIceCandidatePairStats(report));
break;
case 'localcandidate':
map.set(id, createRTCIceCandidateStats(report, false));
break;
case 'remotecandidate':
map.set(id, createRTCIceCandidateStats(report, true));
break;
case 'ssrc':
if (isPresent(report, 'packetsReceived')) {
map.set(`rtp-${id}`, createRTCInboundRTPStreamStats(report));
}
else {
map.set(`rtp-${id}`, createRTCOutboundRTPStreamStats(report));
}
map.set(`track-${id}`, createRTCMediaStreamTrackStats(report));
map.set(`codec-${id}`, createRTCCodecStats(report));
break;
case 'googComponent':
const transportReport = createRTCTransportStats(report);
transportIds.set(transportReport.selectedCandidatePairId, id);
map.set(id, createRTCTransportStats(report));
break;
}
return map;
}, new Map());
if (activeCandidatePairId) {
const activeTransportId = transportIds.get(activeCandidatePairId);
if (activeTransportId) {
statsMap.get(activeTransportId).dtlsState = 'connected';
}
}
return new MockRTCStatsReport(statsMap);
};
/**
* @param {RTCLegacyStatsReport} report
* @returns {RTCTransportStats}
*/
function createRTCTransportStats(report) {
return {
bytesReceived: undefined,
bytesSent: undefined,
dtlsState: undefined,
id: report.id,
localCertificateId: report.stat('localCertificateId'),
remoteCertificateId: report.stat('remoteCertificateId'),
rtcpTransportStatsId: undefined,
selectedCandidatePairId: report.stat('selectedCandidatePairId'),
timestamp: Date.parse(report.timestamp),
type: 'transport',
};
}
/**
* @param {RTCLegacyStatsReport} report
* @returns {RTCCodecStats}
*/
function createRTCCodecStats(report) {
return {
channels: undefined,
clockRate: undefined,
id: report.id,
implementation: undefined,
mimeType: `${report.stat('mediaType')}/${report.stat('googCodecName')}`,
payloadType: undefined,
sdpFmtpLine: undefined,
timestamp: Date.parse(report.timestamp),
type: 'codec',
};
}
/**
* @param {RTCLegacyStatsReport} report
* @returns {RTCMediaStreamTrackStats}
*/
function createRTCMediaStreamTrackStats(report) {
return {
audioLevel: isPresent(report, 'audioOutputLevel')
? getInt(report, 'audioOutputLevel') / OLD_MAX_VOLUME
: (getInt(report, 'audioInputLevel') || 0) / OLD_MAX_VOLUME,
detached: undefined,
echoReturnLoss: getFloat(report, 'googEchoCancellationReturnLoss'),
echoReturnLossEnhancement: getFloat(report, 'googEchoCancellationReturnLossEnhancement'),
ended: undefined,
frameHeight: isPresent(report, 'googFrameHeightReceived')
? getInt(report, 'googFrameHeightReceived')
: getInt(report, 'googFrameHeightSent'),
frameWidth: isPresent(report, 'googFrameWidthReceived')
? getInt(report, 'googFrameWidthReceived')
: getInt(report, 'googFrameWidthSent'),
framesCorrupted: undefined,
framesDecoded: getInt(report, 'framesDecoded'),
framesDropped: undefined,
framesPerSecond: undefined,
framesReceived: undefined,
framesSent: getInt(report, 'framesEncoded'),
fullFramesLost: undefined,
id: report.id,
kind: report.stat('mediaType'),
partialFramesLost: undefined,
remoteSource: undefined,
ssrcIds: undefined,
timestamp: Date.parse(report.timestamp),
trackIdentifier: report.stat('googTrackId'),
type: 'track',
};
}
/**
* @param {RTCLegacyStatsReport} report
* @param {boolean} isInbound - Whether to create an inbound stats object, or outbound.
* @returns {RTCRTPStreamStats}
*/
function createRTCRTPStreamStats(report, isInbound) {
return {
associateStatsId: undefined,
codecId: `codec-${report.id}`,
firCount: isInbound
? getInt(report, 'googFirsSent')
: undefined,
id: report.id,
isRemote: undefined,
mediaType: report.stat('mediaType'),
nackCount: isInbound
? getInt(report, 'googNacksSent')
: getInt(report, 'googNacksReceived'),
pliCount: isInbound
? getInt(report, 'googPlisSent')
: getInt(report, 'googPlisReceived'),
qpSum: getInt(report, 'qpSum'),
sliCount: undefined,
ssrc: report.stat('ssrc'),
timestamp: Date.parse(report.timestamp),
trackId: `track-${report.id}`,
transportId: report.stat('transportId'),
};
}
/**
* @param {RTCLegacyStatsReport} report
* @returns {RTCInboundRTPStreamStats}
*/
function createRTCInboundRTPStreamStats(report) {
const rtp = createRTCRTPStreamStats(report, true);
Object.assign(rtp, {
burstDiscardCount: undefined,
burstDiscardRate: undefined,
burstLossCount: undefined,
burstLossRate: undefined,
burstPacketsDiscarded: undefined,
burstPacketsLost: undefined,
bytesReceived: getInt(report, 'bytesReceived'),
fractionLost: undefined,
framesDecoded: getInt(report, 'framesDecoded'),
gapDiscardRate: undefined,
gapLossRate: undefined,
jitter: convertMsToSeconds(report.stat('googJitterReceived')),
packetsDiscarded: undefined,
packetsLost: getInt(report, 'packetsLost'),
packetsReceived: getInt(report, 'packetsReceived'),
packetsRepaired: undefined,
roundTripTime: convertMsToSeconds(report.stat('googRtt')),
type: 'inbound-rtp',
});
return rtp;
}
/**
* @param {RTCLegacyStatsReport} report
* @returns {RTCOutboundRTPStreamStats}
*/
function createRTCOutboundRTPStreamStats(report) {
const rtp = createRTCRTPStreamStats(report, false);
Object.assign(rtp, {
bytesSent: getInt(report, 'bytesSent'),
framesEncoded: getInt(report, 'framesEncoded'),
packetsSent: getInt(report, 'packetsSent'),
remoteTimestamp: undefined,
targetBitrate: undefined,
type: 'outbound-rtp',
});
return rtp;
}
/**
* @param {RTCLegacyStatsReport} report
* @param {boolean} isRemote - Whether to create for a remote candidate, or local candidate.
* @returns {RTCIceCandidateStats}
*/
function createRTCIceCandidateStats(report, isRemote) {
return {
candidateType: translateCandidateType(report.stat('candidateType')),
deleted: undefined,
id: report.id,
ip: report.stat('ipAddress'),
isRemote,
port: getInt(report, 'portNumber'),
priority: getFloat(report, 'priority'),
protocol: report.stat('transport'),
relayProtocol: undefined,
timestamp: Date.parse(report.timestamp),
transportId: undefined,
type: isRemote
? 'remote-candidate'
: 'local-candidate',
url: undefined,
};
}
/**
* @param {RTCLegacyStatsReport} report
* @returns {RTCIceCandidatePairStats}
*/
function createRTCIceCandidatePairStats(report) {
return {
availableIncomingBitrate: undefined,
availableOutgoingBitrate: undefined,
bytesReceived: getInt(report, 'bytesReceived'),
bytesSent: getInt(report, 'bytesSent'),
consentRequestsSent: getInt(report, 'consentRequestsSent'),
currentRoundTripTime: convertMsToSeconds(report.stat('googRtt')),
id: report.id,
lastPacketReceivedTimestamp: undefined,
lastPacketSentTimestamp: undefined,
localCandidateId: report.stat('localCandidateId'),
nominated: undefined,
priority: undefined,
readable: undefined,
remoteCandidateId: report.stat('remoteCandidateId'),
requestsReceived: getInt(report, 'requestsReceived'),
requestsSent: getInt(report, 'requestsSent'),
responsesReceived: getInt(report, 'responsesReceived'),
responsesSent: getInt(report, 'responsesSent'),
retransmissionsReceived: undefined,
retransmissionsSent: undefined,
state: undefined,
timestamp: Date.parse(report.timestamp),
totalRoundTripTime: undefined,
transportId: report.stat('googChannelId'),
type: 'candidate-pair',
writable: getBoolean(report, 'googWritable'),
};
}
/**
* @param {RTCLegacyStatsReport} report
* @returns {RTCIceCertificateStats}
*/
function createRTCCertificateStats(report) {
return {
base64Certificate: report.stat('googDerBase64'),
fingerprint: report.stat('googFingerprint'),
fingerprintAlgorithm: report.stat('googFingerprintAlgorithm'),
id: report.id,
issuerCertificateId: report.stat('googIssuerId'),
timestamp: Date.parse(report.timestamp),
type: 'certificate',
};
}
/**
* @param {RTCLegacyStatsReport} report
* @returns {RTCDataChannelStats}
*/
function createRTCDataChannelStats(report) {
return {
bytesReceived: undefined,
bytesSent: undefined,
datachannelid: report.stat('datachannelid'),
id: report.id,
label: report.stat('label'),
messagesReceived: undefined,
messagesSent: undefined,
protocol: report.stat('protocol'),
state: report.stat('state'),
timestamp: Date.parse(report.timestamp),
transportId: report.stat('transportId'),
type: 'data-channel',
};
}
/**
* @param {number} inMs - A time in milliseconds
* @returns {number} The time in seconds
*/
function convertMsToSeconds(inMs) {
return isNaN(inMs) || inMs === ''
? undefined
: parseInt(inMs, 10) / 1000;
}
/**
* @param {string} type - A type in the legacy format
* @returns {string} The type adjusted to new standards for known naming changes
*/
function translateCandidateType(type) {
switch (type) {
case 'peerreflexive':
return 'prflx';
case 'serverreflexive':
return 'srflx';
case 'host':
case 'relay':
default:
return type;
}
}
function getInt(report, statName) {
const stat = report.stat(statName);
return isPresent(report, statName)
? parseInt(stat, 10)
: undefined;
}
function getFloat(report, statName) {
const stat = report.stat(statName);
return isPresent(report, statName)
? parseFloat(stat)
: undefined;
}
function getBoolean(report, statName) {
const stat = report.stat(statName);
return isPresent(report, statName)
? (stat === 'true' || stat === true)
: undefined;
}
function isPresent(report, statName) {
const stat = report.stat(statName);
return typeof stat !== 'undefined' && stat !== '';
}
export default MockRTCStatsReport;
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