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How to use transceivers method in wpt
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DefaultTransceiverController.test.ts
Source:DefaultTransceiverController.test.ts 
1// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.2// SPDX-License-Identifier: Apache-2.03import * as chai from 'chai';4import BrowserBehavior from '../../src/browserbehavior/BrowserBehavior';5import DefaultBrowserBehavior from '../../src/browserbehavior/DefaultBrowserBehavior';6import LogLevel from '../../src/logger/LogLevel';7import NoOpLogger from '../../src/logger/NoOpLogger';8import TimeoutScheduler from '../../src/scheduler/TimeoutScheduler';9import {10 SdkIndexFrame,11 SdkStreamDescriptor,12 SdkStreamMediaType,13 SdkSubscribeAckFrame,14 SdkTrackMapping,15} from '../../src/signalingprotocol/SignalingProtocol.js';16import DefaultTransceiverController from '../../src/transceivercontroller/DefaultTransceiverController';17import TransceiverController from '../../src/transceivercontroller/TransceiverController';18import DefaultVideoStreamIdSet from '../../src/videostreamidset/DefaultVideoStreamIdSet';19import VideoStreamIdSet from '../../src/videostreamidset/VideoStreamIdSet';20import DefaultVideoStreamIndex from '../../src/videostreamindex/DefaultVideoStreamIndex';21import DOMMockBehavior from '../dommock/DOMMockBehavior';22import DOMMockBuilder from '../dommock/DOMMockBuilder';23describe('DefaultTransceiverController', () => {24 const expect: Chai.ExpectStatic = chai.expect;25 const logger = new NoOpLogger(LogLevel.DEBUG);26 const domMockBehavior: DOMMockBehavior = new DOMMockBehavior();27 let tc: TransceiverController;28 let domMockBuilder: DOMMockBuilder;29 let browser: BrowserBehavior;30 beforeEach(() => {31 domMockBehavior.browserName = 'firefox';32 domMockBuilder = new DOMMockBuilder(domMockBehavior);33 browser = new DefaultBrowserBehavior();34 tc = new DefaultTransceiverController(logger, browser);35 });36 afterEach(() => {37 tc = new DefaultTransceiverController(logger, browser);38 domMockBuilder.cleanup();39 });40 describe('construction', () => {41 it('can be constructed', () => {42 expect(tc).to.not.equal(null);43 });44 });45 describe('useTransceivers', () => {46 it('can set peer connection and reset', () => {47 expect(tc.useTransceivers()).to.equal(false);48 const peer: RTCPeerConnection = new RTCPeerConnection();49 tc.setPeer(peer);50 expect(tc.useTransceivers()).to.equal(true);51 tc.reset();52 expect(tc.useTransceivers()).to.equal(false);53 });54 });55 describe('setupLocalTransceivers', () => {56 it('can not set up transceivers if peer connection is not set', () => {57 const peer: RTCPeerConnection = new RTCPeerConnection();58 tc.setupLocalTransceivers();59 expect(peer.getTransceivers().length).to.equal(0);60 });61 it('can set up transceivers once', () => {62 const peer: RTCPeerConnection = new RTCPeerConnection();63 tc.setPeer(peer);64 expect(peer.getTransceivers().length).to.equal(0);65 tc.setupLocalTransceivers();66 const transceivers = peer.getTransceivers();67 expect(transceivers.length).to.equal(2);68 const audioTransceiver = transceivers[0];69 expect(audioTransceiver.direction).to.equal('inactive');70 expect(audioTransceiver.receiver.track.kind).to.equal('audio');71 expect(audioTransceiver.sender.track.kind).to.equal('audio');72 const videoTransceiver = transceivers[1];73 expect(videoTransceiver.direction).to.equal('inactive');74 expect(videoTransceiver.receiver.track.kind).to.equal('video');75 expect(videoTransceiver.sender.track.kind).to.equal('video');76 tc.setupLocalTransceivers();77 expect(peer.getTransceivers()[0]).to.equal(audioTransceiver);78 expect(peer.getTransceivers()[1]).to.equal(videoTransceiver);79 });80 });81 describe('hasVideoInput', () => {82 it('return false if video input doesnt exist', () => {83 const peer: RTCPeerConnection = new RTCPeerConnection();84 tc.setPeer(peer);85 tc.setupLocalTransceivers();86 expect(tc.hasVideoInput()).to.equal(false);87 });88 it('return true if video input exists', done => {89 const peer: RTCPeerConnection = new RTCPeerConnection();90 tc.setPeer(peer);91 tc.setupLocalTransceivers();92 const newVideoTrack = new MediaStreamTrack();93 tc.setVideoInput(newVideoTrack);94 new TimeoutScheduler(domMockBehavior.asyncWaitMs + 10).start(() => {95 expect(tc.hasVideoInput()).to.equal(true);96 done();97 });98 });99 });100 describe('trackIsVideoInput', () => {101 it('can check whether the given track is a video input', () => {102 const peer: RTCPeerConnection = new RTCPeerConnection();103 tc.setPeer(peer);104 tc.setupLocalTransceivers();105 const audioTrack = peer.getTransceivers()[0].receiver.track;106 expect(tc.trackIsVideoInput(audioTrack)).to.equal(false);107 const videoTrack = peer.getTransceivers()[1].receiver.track;108 expect(tc.trackIsVideoInput(videoTrack)).to.equal(true);109 });110 it('can not check if it has reset transceivers', () => {111 const peer: RTCPeerConnection = new RTCPeerConnection();112 tc.setPeer(peer);113 tc.setupLocalTransceivers();114 const videoTrack = peer.getTransceivers()[1].receiver.track;115 tc.reset();116 expect(tc.trackIsVideoInput(videoTrack)).to.equal(false);117 });118 });119 describe('setAudioInput', () => {120 it('can set the audio track to null', done => {121 const peer: RTCPeerConnection = new RTCPeerConnection();122 tc.setPeer(peer);123 tc.setupLocalTransceivers();124 tc.setAudioInput(null);125 new TimeoutScheduler(domMockBehavior.asyncWaitMs + 10).start(() => {126 const audioTransceiver = peer.getTransceivers()[0];127 expect(audioTransceiver.sender.track).to.equal(null);128 done();129 });130 });131 it('can set the audio track', done => {132 const peer: RTCPeerConnection = new RTCPeerConnection();133 tc.setPeer(peer);134 tc.setupLocalTransceivers();135 const newAudioTrack = new MediaStreamTrack();136 tc.setAudioInput(newAudioTrack);137 new TimeoutScheduler(domMockBehavior.asyncWaitMs + 10).start(() => {138 const audioTransceiver = peer.getTransceivers()[0];139 expect(audioTransceiver.direction).to.equal('sendrecv');140 expect(audioTransceiver.sender.track).to.equal(newAudioTrack);141 done();142 });143 });144 it('can not set the audio track if transceivers have not been set up', done => {145 const peer: RTCPeerConnection = new RTCPeerConnection();146 tc.setPeer(peer);147 const newAudioTrack = new MediaStreamTrack();148 tc.setAudioInput(newAudioTrack);149 new TimeoutScheduler(domMockBehavior.asyncWaitMs + 10).start(() => {150 const audioTransceiver = peer.getTransceivers()[0];151 expect(audioTransceiver).to.be.undefined;152 done();153 });154 });155 });156 describe('setVideoInput', () => {157 it('can set the video track to null', done => {158 const peer: RTCPeerConnection = new RTCPeerConnection();159 tc.setPeer(peer);160 tc.setupLocalTransceivers();161 tc.setVideoInput(null);162 new TimeoutScheduler(domMockBehavior.asyncWaitMs + 10).start(() => {163 const videoTransceiver = peer.getTransceivers()[1];164 expect(videoTransceiver.sender.track).to.equal(null);165 done();166 });167 });168 it('can set the video track', done => {169 const peer: RTCPeerConnection = new RTCPeerConnection();170 tc.setPeer(peer);171 tc.setupLocalTransceivers();172 const newVideoTrack = new MediaStreamTrack();173 tc.setVideoInput(newVideoTrack);174 new TimeoutScheduler(domMockBehavior.asyncWaitMs + 10).start(() => {175 const videoTransceiver = peer.getTransceivers()[1];176 expect(videoTransceiver.direction).to.equal('sendrecv');177 expect(videoTransceiver.sender.track).to.equal(newVideoTrack);178 done();179 });180 });181 it('can not set the video track if transceivers have not been set up', done => {182 const peer: RTCPeerConnection = new RTCPeerConnection();183 tc.setPeer(peer);184 const newVideoTrack = new MediaStreamTrack();185 tc.setVideoInput(newVideoTrack);186 new TimeoutScheduler(domMockBehavior.asyncWaitMs + 10).start(() => {187 const videoTransceiver = peer.getTransceivers()[1];188 expect(videoTransceiver).to.be.undefined;189 done();190 });191 });192 });193 describe('updateVideoTransceivers', () => {194 let peer: RTCPeerConnection;195 function prepareIndex(streamIds: number[]): DefaultVideoStreamIndex {196 const index: DefaultVideoStreamIndex = new DefaultVideoStreamIndex(logger);197 const sources: SdkStreamDescriptor[] = [];198 for (const id of streamIds) {199 sources.push(200 new SdkStreamDescriptor({201 streamId: id,202 groupId: id,203 maxBitrateKbps: 100,204 mediaType: SdkStreamMediaType.VIDEO,205 })206 );207 }208 index.integrateIndexFrame(209 new SdkIndexFrame({210 atCapacity: false,211 sources: sources,212 })213 );214 return index;215 }216 type Writable<T> = {217 -readonly [K in keyof T]: T[K];218 };219 function setTransceiverStreamId(videoStreamIds: VideoStreamIdSet): void {220 const streamIds = videoStreamIds.array();221 const transceivers: RTCRtpTransceiver[] = peer.getTransceivers();222 let transStartIndex = 0;223 // Look for first recvonly transceiver224 for (const [index, transceiver] of transceivers.entries()) {225 if (transceiver.direction === 'recvonly') {226 transStartIndex = index;227 break;228 }229 }230 for (const [index, streamId] of streamIds.entries()) {231 const transceiver = transceivers[transStartIndex + index];232 (transceiver as Writable<RTCRtpTransceiver>).mid = streamId.toString();233 }234 }235 function verifyTransceiverDirections(directions: string[]): void {236 const transceivers: RTCRtpTransceiver[] = peer.getTransceivers();237 const actualDirections = transceivers.map(transceiver => transceiver.direction);238 expect(actualDirections).deep.equal(directions);239 }240 beforeEach(() => {241 peer = new RTCPeerConnection();242 tc.setPeer(peer);243 });244 it('cannot update video transceivers if it has reset transceivers', () => {245 tc.reset();246 const videoStreamIndex = prepareIndex([7]);247 const videosToReceive: VideoStreamIdSet = new DefaultVideoStreamIdSet();248 const videoSubscriptions: number[] = tc.updateVideoTransceivers(249 videoStreamIndex,250 videosToReceive251 );252 expect(videoSubscriptions).to.deep.equal([]);253 expect(peer.getTransceivers().length).to.equal(0);254 });255 it('includes a zero for a potential local video', () => {256 const videoStreamIndex = prepareIndex([7]);257 const videosToReceive: VideoStreamIdSet = new DefaultVideoStreamIdSet();258 const videoSubscriptions: number[] = tc.updateVideoTransceivers(259 videoStreamIndex,260 videosToReceive261 );262 expect(videoSubscriptions).to.deep.equal([0]);263 expect(peer.getTransceivers().length).to.equal(0);264 });265 it('creates a transceiver to subscribe to one remote video', () => {266 const videoStreamIndex = prepareIndex([7]);267 const videosToReceive: VideoStreamIdSet = new DefaultVideoStreamIdSet([7]);268 const videoSubscriptions: number[] = tc.updateVideoTransceivers(269 videoStreamIndex,270 videosToReceive271 );272 expect(videoSubscriptions).to.deep.equal([0, 7]);273 verifyTransceiverDirections(['recvonly']);274 });275 it('when unsubscribing from a remote video, marks the transceiver inactive and leaves a zero in the video subscriptions slot', () => {276 const videoStreamIndex = prepareIndex([7]);277 let videosToReceive: VideoStreamIdSet = new DefaultVideoStreamIdSet([7]);278 let videoSubscriptions: number[] = tc.updateVideoTransceivers(279 videoStreamIndex,280 videosToReceive281 );282 expect(videoSubscriptions).to.deep.equal([0, 7]);283 verifyTransceiverDirections(['recvonly']);284 videosToReceive = new DefaultVideoStreamIdSet();285 videoSubscriptions = tc.updateVideoTransceivers(videoStreamIndex, videosToReceive);286 expect(videoSubscriptions).to.deep.equal([0, 0]);287 verifyTransceiverDirections(['inactive']);288 });289 it('with two subscriptions, unsubscribes from the last', () => {290 const videoStreamIndex = prepareIndex([7, 8]);291 let videosToReceive: VideoStreamIdSet = new DefaultVideoStreamIdSet([7, 8]);292 let videoSubscriptions: number[] = tc.updateVideoTransceivers(293 videoStreamIndex,294 videosToReceive295 );296 expect(videoSubscriptions).to.deep.equal([0, 7, 8]);297 verifyTransceiverDirections(['recvonly', 'recvonly']);298 const subackFrame = new SdkSubscribeAckFrame({299 tracks: [300 new SdkTrackMapping({ streamId: 7, trackLabel: 'v_7' }),301 new SdkTrackMapping({ streamId: 8, trackLabel: 'v_8' }),302 ],303 });304 videoStreamIndex.integrateSubscribeAckFrame(subackFrame);305 setTransceiverStreamId(videosToReceive);306 videosToReceive = new DefaultVideoStreamIdSet([7]);307 videoSubscriptions = tc.updateVideoTransceivers(videoStreamIndex, videosToReceive);308 expect(videoSubscriptions).to.deep.equal([0, 7, 0]);309 verifyTransceiverDirections(['recvonly', 'inactive']);310 });311 it('with two subscriptions, unsubscribes from both, then resubscribes to both', () => {312 const videoStreamIndex = prepareIndex([7, 8]);313 let videosToReceive: VideoStreamIdSet = new DefaultVideoStreamIdSet([7, 8]);314 let videoSubscriptions: number[] = tc.updateVideoTransceivers(315 videoStreamIndex,316 videosToReceive317 );318 expect(videoSubscriptions).to.deep.equal([0, 7, 8]);319 verifyTransceiverDirections(['recvonly', 'recvonly']);320 let subackFrame = new SdkSubscribeAckFrame({321 tracks: [322 new SdkTrackMapping({ streamId: 7, trackLabel: 'v_7' }),323 new SdkTrackMapping({ streamId: 8, trackLabel: 'v_8' }),324 ],325 });326 videoStreamIndex.integrateSubscribeAckFrame(subackFrame);327 setTransceiverStreamId(videosToReceive);328 videosToReceive = new DefaultVideoStreamIdSet([7]);329 videoSubscriptions = tc.updateVideoTransceivers(videoStreamIndex, videosToReceive);330 expect(videoSubscriptions).to.deep.equal([0, 7, 0]);331 verifyTransceiverDirections(['recvonly', 'inactive']);332 subackFrame = new SdkSubscribeAckFrame({333 tracks: [new SdkTrackMapping({ streamId: 7, trackLabel: 'v_7' })],334 });335 videoStreamIndex.integrateSubscribeAckFrame(subackFrame);336 setTransceiverStreamId(videosToReceive);337 videosToReceive = new DefaultVideoStreamIdSet([]);338 videoSubscriptions = tc.updateVideoTransceivers(videoStreamIndex, videosToReceive);339 expect(videoSubscriptions).to.deep.equal([0, 0, 0]);340 verifyTransceiverDirections(['inactive', 'inactive']);341 subackFrame = new SdkSubscribeAckFrame({342 tracks: [],343 });344 videoStreamIndex.integrateSubscribeAckFrame(subackFrame);345 setTransceiverStreamId(videosToReceive);346 videosToReceive = new DefaultVideoStreamIdSet([7]);347 videoSubscriptions = tc.updateVideoTransceivers(videoStreamIndex, videosToReceive);348 expect(videoSubscriptions).to.deep.equal([0, 7, 0]);349 verifyTransceiverDirections(['recvonly', 'inactive']);350 subackFrame = new SdkSubscribeAckFrame({351 tracks: [new SdkTrackMapping({ streamId: 7, trackLabel: 'v_7' })],352 });353 videoStreamIndex.integrateSubscribeAckFrame(subackFrame);354 setTransceiverStreamId(videosToReceive);355 videosToReceive = new DefaultVideoStreamIdSet([7, 8]);356 videoSubscriptions = tc.updateVideoTransceivers(videoStreamIndex, videosToReceive);357 expect(videoSubscriptions).to.deep.equal([0, 7, 8]);358 verifyTransceiverDirections(['recvonly', 'recvonly']);359 });360 it('will not reuse transceiver when unsubscribe from one and subscribe to another', () => {361 const videoStreamIndex = prepareIndex([1, 4]);362 let videosToReceive: VideoStreamIdSet = new DefaultVideoStreamIdSet([1]);363 let videoSubscriptions: number[] = tc.updateVideoTransceivers(364 videoStreamIndex,365 videosToReceive366 );367 expect(videoSubscriptions).to.deep.equal([0, 1]);368 verifyTransceiverDirections(['recvonly']);369 const subackFrame = new SdkSubscribeAckFrame({370 tracks: [new SdkTrackMapping({ streamId: 1, trackLabel: 'v_1' })],371 });372 videoStreamIndex.integrateSubscribeAckFrame(subackFrame);373 setTransceiverStreamId(videosToReceive);374 videosToReceive = new DefaultVideoStreamIdSet([4]);375 videoSubscriptions = tc.updateVideoTransceivers(videoStreamIndex, videosToReceive);376 expect(videoSubscriptions).to.deep.equal([0, 0, 4]);377 verifyTransceiverDirections(['inactive', 'recvonly']);378 });379 it('will not reuse transceiver when index removes one and adds one', () => {380 let videoStreamIndex = prepareIndex([1]);381 let videosToReceive: VideoStreamIdSet = new DefaultVideoStreamIdSet([1]);382 let videoSubscriptions: number[] = tc.updateVideoTransceivers(383 videoStreamIndex,384 videosToReceive385 );386 expect(videoSubscriptions).to.deep.equal([0, 1]);387 verifyTransceiverDirections(['recvonly']);388 const subackFrame = new SdkSubscribeAckFrame({389 tracks: [new SdkTrackMapping({ streamId: 1, trackLabel: 'v_1' })],390 });391 videoStreamIndex.integrateSubscribeAckFrame(subackFrame);392 setTransceiverStreamId(videosToReceive);393 videoStreamIndex = prepareIndex([4]);394 videosToReceive = new DefaultVideoStreamIdSet([4]);395 videoSubscriptions = tc.updateVideoTransceivers(videoStreamIndex, videosToReceive);396 expect(videoSubscriptions).to.deep.equal([0, 0, 4]);397 verifyTransceiverDirections(['inactive', 'recvonly']);398 });399 it('will use local transceivers', () => {400 tc.setupLocalTransceivers();401 const videoStreamIndex = prepareIndex([7, 8]);402 const videosToReceive: VideoStreamIdSet = new DefaultVideoStreamIdSet([7, 8]);403 let videoSubscriptions: number[] = tc.updateVideoTransceivers(404 videoStreamIndex,405 videosToReceive406 );407 const subackFrame = new SdkSubscribeAckFrame({408 tracks: [409 new SdkTrackMapping({ streamId: 7, trackLabel: 'v_7' }),410 new SdkTrackMapping({ streamId: 8, trackLabel: 'v_8' }),411 ],412 });413 videoStreamIndex.integrateSubscribeAckFrame(subackFrame);414 setTransceiverStreamId(videosToReceive);415 videoSubscriptions = tc.updateVideoTransceivers(videoStreamIndex, videosToReceive);416 expect(videoSubscriptions).to.deep.equal([0, 7, 8]);417 verifyTransceiverDirections(['inactive', 'inactive', 'recvonly', 'recvonly']);418 });419 it('will use a transceiver\'s mid prefixed with "v_" to get the streamId for the track', () => {420 const streamId = 4;421 const videoStreamIndex = prepareIndex([streamId, 8]);422 const videosToReceive: VideoStreamIdSet = new DefaultVideoStreamIdSet([streamId, 8]);423 let videoSubscriptions: number[] = tc.updateVideoTransceivers(424 videoStreamIndex,425 videosToReceive426 );427 const subackFrame = new SdkSubscribeAckFrame({428 tracks: [429 new SdkTrackMapping({ streamId: 2, trackLabel: 'b18b9db2' }),430 new SdkTrackMapping({ streamId: streamId, trackLabel: 'v_4' }),431 new SdkTrackMapping({ streamId: 8, trackLabel: 'v_8' }),432 ],433 });434 videoStreamIndex.integrateSubscribeAckFrame(subackFrame);435 setTransceiverStreamId(videosToReceive);436 videoSubscriptions = tc.updateVideoTransceivers(videoStreamIndex, videosToReceive);437 expect(videoSubscriptions).to.deep.equal([0, streamId, 8]);438 verifyTransceiverDirections(['recvonly', 'recvonly']);439 });440 });441 describe('setVideoSendingBitrateKbps', () => {442 it('will not set bitrate if transceiver is not set up', () => {443 tc.setVideoSendingBitrateKbps(100);444 });445 it('sets bitrate on RTCRtpSender correctly', done => {446 const peer: RTCPeerConnection = new RTCPeerConnection();447 tc.setPeer(peer);448 tc.setupLocalTransceivers();449 const newVideoTrack = new MediaStreamTrack();450 tc.setVideoInput(newVideoTrack);451 new TimeoutScheduler(domMockBehavior.asyncWaitMs + 10).start(() => {452 const videoTransceiver = peer.getTransceivers()[1];453 expect(videoTransceiver.direction).to.equal('sendrecv');454 expect(videoTransceiver.sender.track).to.equal(newVideoTrack);455 const parameter = {456 degradationPreference: null,457 transactionId: '',458 } as RTCRtpSendParameters;459 videoTransceiver.sender.setParameters(parameter);460 tc.setVideoSendingBitrateKbps(100);461 });462 new TimeoutScheduler(domMockBehavior.asyncWaitMs + 10).start(() => {463 tc.setVideoSendingBitrateKbps(200);464 const parameter = peer.getTransceivers()[1].sender.getParameters();465 expect(parameter.encodings[0].maxBitrate).to.equal(200 * 1000);466 done();467 });468 });469 });470 describe('replaceAudioTrack', () => {471 it('returns false if transceiver is not set up or audio transceiver is not sending', async () => {472 const newAudioTrack = new MediaStreamTrack();473 let success = await tc.replaceAudioTrack(newAudioTrack);474 expect(success).to.be.false;475 // set up local transceivers476 success = true;477 const peer: RTCPeerConnection = new RTCPeerConnection();478 tc.setPeer(peer);479 tc.setupLocalTransceivers();480 success = await tc.replaceAudioTrack(newAudioTrack);481 expect(success).to.be.false;482 // set audio input to activate transceiver483 tc.setAudioInput(newAudioTrack);484 const newAudioTrack2 = new MediaStreamTrack();485 success = await tc.replaceAudioTrack(newAudioTrack2);486 expect(success).to.be.true;487 const audioTransceiver = peer.getTransceivers()[0];488 expect(audioTransceiver.sender.track).to.equal(newAudioTrack2);489 });490 });491 describe('replaceAudioTrackForSender', () => {492 it('returns false if input sender is null', async () => {493 const audioTrack = new MediaStreamTrack();494 const success = await DefaultTransceiverController.replaceAudioTrackForSender(495 null,496 audioTrack497 );498 expect(success).to.be.false;499 });500 it('returns true if audio track is replaced', async () => {501 const sender = new RTCRtpSender();502 const audioTrack = new MediaStreamTrack();503 const success = await DefaultTransceiverController.replaceAudioTrackForSender(504 sender,505 audioTrack506 );507 expect(success).to.be.true;508 expect(sender.track).to.equal(audioTrack);509 });510 });...
DefaultTransceiverController.ts
Source:DefaultTransceiverController.ts
1// Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.2// SPDX-License-Identifier: Apache-2.03import BrowserBehavior from '../browserbehavior/DefaultBrowserBehavior';4import DefaultBrowserBehavior from '../browserbehavior/DefaultBrowserBehavior';5import Logger from '../logger/Logger';6import VideoStreamIdSet from '../videostreamidset/VideoStreamIdSet';7import VideoStreamIndex from '../videostreamindex/VideoStreamIndex';8import TransceiverController from './TransceiverController';9export default class DefaultTransceiverController implements TransceiverController {10 private localCameraTransceiver: RTCRtpTransceiver | null = null;11 private localAudioTransceiver: RTCRtpTransceiver | null = null;12 private videoSubscriptions: number[] = [];13 private defaultMediaStream: MediaStream | null = null;14 private peer: RTCPeerConnection | null = null;15 private browserBehavior: BrowserBehavior = new DefaultBrowserBehavior();16 constructor(private logger: Logger) {}17 static setVideoSendingBitrateKbpsForSender(18 sender: RTCRtpSender,19 bitrateKbps: number,20 logger: Logger21 ): void {22 if (!sender || bitrateKbps <= 0) {23 return;24 }25 const param: RTCRtpSendParameters = sender.getParameters();26 if (!param.encodings) {27 param.encodings = [{}];28 }29 for (const encodeParam of param.encodings) {30 encodeParam.maxBitrate = bitrateKbps * 1000;31 }32 sender.setParameters(param);33 logger.info(`set video send bandwidth to ${bitrateKbps}kbps`);34 }35 static async replaceAudioTrackForSender(36 sender: RTCRtpSender,37 track: MediaStreamTrack38 ): Promise<boolean> {39 if (!sender) {40 return false;41 }42 await sender.replaceTrack(track);43 return true;44 }45 setVideoSendingBitrateKbps(bitrateKbps: number): void {46 // this won't set bandwidth limitation for video in Chrome47 if (!this.localCameraTransceiver || this.localCameraTransceiver.direction !== 'sendrecv') {48 return;49 }50 const sender: RTCRtpSender = this.localCameraTransceiver.sender;51 DefaultTransceiverController.setVideoSendingBitrateKbpsForSender(52 sender,53 bitrateKbps,54 this.logger55 );56 }57 setPeer(peer: RTCPeerConnection): void {58 this.peer = peer;59 }60 reset(): void {61 this.localCameraTransceiver = null;62 this.localAudioTransceiver = null;63 this.videoSubscriptions = [];64 this.defaultMediaStream = null;65 this.peer = null;66 }67 useTransceivers(): boolean {68 if (!this.peer || !this.browserBehavior.requiresUnifiedPlan()) {69 return false;70 }71 return typeof this.peer.getTransceivers !== 'undefined';72 }73 trackIsVideoInput(track: MediaStreamTrack): boolean {74 if (!this.localCameraTransceiver) {75 return false;76 }77 return (78 track === this.localCameraTransceiver.sender.track ||79 track === this.localCameraTransceiver.receiver.track80 );81 }82 setupLocalTransceivers(): void {83 if (!this.useTransceivers()) {84 return;85 }86 if (!this.defaultMediaStream && typeof MediaStream !== 'undefined') {87 this.defaultMediaStream = new MediaStream();88 }89 if (!this.localAudioTransceiver) {90 this.localAudioTransceiver = this.peer.addTransceiver('audio', {91 direction: 'inactive',92 streams: [this.defaultMediaStream],93 });94 }95 if (!this.localCameraTransceiver) {96 this.localCameraTransceiver = this.peer.addTransceiver('video', {97 direction: 'inactive',98 streams: [this.defaultMediaStream],99 });100 }101 }102 setAudioInput(track: MediaStreamTrack | null): void {103 this.setTransceiverInput(this.localAudioTransceiver, track);104 }105 async replaceAudioTrack(track: MediaStreamTrack): Promise<boolean> {106 if (!this.localAudioTransceiver || this.localAudioTransceiver.direction !== 'sendrecv') {107 this.logger.info(`audio transceiver direction is not set up or not activated`);108 return false;109 }110 await this.localAudioTransceiver.sender.replaceTrack(track);111 return true;112 }113 setVideoInput(track: MediaStreamTrack | null): void {114 this.setTransceiverInput(this.localCameraTransceiver, track);115 }116 updateVideoTransceivers(117 videoStreamIndex: VideoStreamIndex,118 videosToReceive: VideoStreamIdSet119 ): number[] {120 if (!this.useTransceivers()) {121 return videosToReceive.array();122 }123 // See https://blog.mozilla.org/webrtc/rtcrtptransceiver-explored/ for details on transceivers124 const transceivers: RTCRtpTransceiver[] = this.peer.getTransceivers();125 // Subscription index 0 is reserved for transmitting camera.126 // We mark inactive slots with 0 in the subscription array.127 this.videoSubscriptions = [0];128 videosToReceive = videosToReceive.clone();129 this.unsubscribeTransceivers(transceivers, videoStreamIndex, videosToReceive);130 this.subscribeTransceivers(transceivers, videosToReceive);131 this.logger.debug(() => {132 return this.debugDumpTransceivers();133 });134 return this.videoSubscriptions;135 }136 private unsubscribeTransceivers(137 transceivers: RTCRtpTransceiver[],138 videoStreamIndex: VideoStreamIndex,139 videosToReceive: VideoStreamIdSet140 ): void {141 // disable transceivers which are no longer going to subscribe142 for (const transceiver of transceivers) {143 if (transceiver === this.localCameraTransceiver || !this.transceiverIsVideo(transceiver)) {144 continue;145 }146 // by convention with the video host, msid is equal to the media section mid, prefixed with the string "v_"147 // we use this to get the streamId for the track148 const streamId = videoStreamIndex.streamIdForTrack('v_' + transceiver.mid);149 if (streamId !== undefined && videosToReceive.contain(streamId)) {150 transceiver.direction = 'recvonly';151 this.videoSubscriptions.push(streamId);152 videosToReceive.remove(streamId);153 } else {154 transceiver.direction = 'inactive';155 // mark this slot inactive with a 0 in the subscription array156 this.videoSubscriptions.push(0);157 }158 }159 }160 private subscribeTransceivers(161 transceivers: RTCRtpTransceiver[],162 videosToReceive: VideoStreamIdSet163 ): void {164 if (videosToReceive.size() === 0) {165 return;166 }167 // Handle remaining subscriptions using existing inactive transceivers.168 const videosRemaining = videosToReceive.array();169 // Begin counting out index in the the subscription array at 1 since the camera.170 // Always occupies position 0 (whether active or not).171 let n = 1;172 for (const transceiver of transceivers) {173 if (transceiver === this.localCameraTransceiver || !this.transceiverIsVideo(transceiver)) {174 continue;175 }176 if (transceiver.direction === 'inactive') {177 transceiver.direction = 'recvonly';178 const streamId = videosRemaining.shift();179 this.videoSubscriptions[n] = streamId;180 if (videosRemaining.length === 0) {181 break;182 }183 }184 n += 1;185 }186 // add transceivers for the remaining subscriptions187 for (const index of videosRemaining) {188 // @ts-ignore189 const transceiver = this.peer.addTransceiver('video', {190 direction: 'recvonly',191 streams: [this.defaultMediaStream],192 });193 this.videoSubscriptions.push(index);194 this.logger.info(195 `adding transceiver mid: ${transceiver.mid} subscription: ${index} direction: recvonly`196 );197 }198 }199 private transceiverIsVideo(transceiver: RTCRtpTransceiver): boolean {200 return (201 (transceiver.receiver &&202 transceiver.receiver.track &&203 transceiver.receiver.track.kind === 'video') ||204 (transceiver.sender && transceiver.sender.track && transceiver.sender.track.kind === 'video')205 );206 }207 private debugDumpTransceivers(): string {208 let msg = '';209 let n = 0;210 for (const transceiver of this.peer.getTransceivers()) {211 if (!this.transceiverIsVideo(transceiver)) {212 continue;213 }214 msg += `transceiver index=${n} mid=${transceiver.mid} subscription=${this.videoSubscriptions[n]} direction=${transceiver.direction}\n`;215 n += 1;216 }217 return msg;218 }219 private setTransceiverInput(220 transceiver: RTCRtpTransceiver | null,221 track: MediaStreamTrack222 ): void {223 if (!transceiver) {224 return;225 }226 if (track) {227 transceiver.direction = 'sendrecv';228 } else {229 transceiver.direction = 'inactive';230 }231 transceiver.sender.replaceTrack(track);232 }...
peer.js
Source:peer.js
1/*2 * Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.3 *4 * Use of this source code is governed by a BSD-style license5 * that can be found in the LICENSE file in the root of the source6 * tree.7 */8'use strict';9/**10 * Establishes a Peer Connection with `other` using the Perfect Negotiation pattern.11 * @param {Window} other12 * @param {boolean} polite13 * @param {function(Error): void} fail14 * @return {RTCPeerConnection} Peer Connection15 */16function peer(other, polite, fail = undefined) { // eslint-disable-line no-unused-vars17 if (!fail) fail = e => void send(window.parent, {error: `${e.name}: ${e.message}`});18 const send = (target, msg) => void target.postMessage(JSON.parse(JSON.stringify(msg)), '*');19 const log = str => void console.log(`[${polite ? 'POLITE' : 'IMPOLITE'}] ${str}`);20 const assert_equals = !window.assert_equals ?21 (a, b, msg) => a === b || void fail(new Error(`${msg} expected ${b} but got ${a}`)) :22 window.assert_equals;23 const pc = new RTCPeerConnection();24 const localVideo1 = document.getElementById('localVideo1');25 const localVideo2 = document.getElementById('localVideo2');26 const remoteVideo = document.getElementById('remoteVideo');27 const transceiversForSending = [];28 const commands = {29 async swapTransceivers() {30 log('swapTransceivers');31 const stream1 = localVideo1.srcObject;32 const stream2 = localVideo2.srcObject;33 if (transceiversForSending.length == 0) {34 // This is the first time swapTransceivers is called.35 // Add the initial transceivers, which are remembered for future swaps.36 transceiversForSending.push(37 pc.addTransceiver(stream1.getTracks()[0], {streams: [stream1], direction: 'sendonly'}));38 transceiversForSending.push(39 pc.addTransceiver('video', {streams: [stream2], direction: 'inactive'}));40 return;41 }42 // We have sent before. Swap which transceiver is the sending one.43 if (transceiversForSending[0].direction == 'sendonly') {44 transceiversForSending[0].direction = 'inactive';45 transceiversForSending[0].sender.replaceTrack(null);46 transceiversForSending[1].direction = 'sendonly';47 transceiversForSending[1].sender.replaceTrack(stream2.getTracks()[0]);48 } else {49 transceiversForSending[1].direction = 'inactive';50 transceiversForSending[1].sender.replaceTrack(null);51 transceiversForSending[0].direction = 'sendonly';52 transceiversForSending[0].sender.replaceTrack(stream1.getTracks()[0]);53 }54 },55 };56 try {57 pc.ontrack = e => {58 log('ontrack');59 remoteVideo.srcObject = new MediaStream();60 remoteVideo.srcObject.addTrack(e.track);61 };62 pc.onicecandidate = ({candidate}) => void send(other, {candidate});63 let makingOffer = false;64 let ignoreOffer = false;65 let srdAnswerPending = false;66 pc.onnegotiationneeded = async () => {67 try {68 log('SLD due to negotiationneeded');69 assert_equals(pc.signalingState, 'stable', 'negotiationneeded always fires in stable state');70 assert_equals(makingOffer, false, 'negotiationneeded not already in progress');71 makingOffer = true;72 await pc.setLocalDescription();73 assert_equals(pc.signalingState, 'have-local-offer', 'negotiationneeded not racing with onmessage');74 assert_equals(pc.localDescription.type, 'offer', 'negotiationneeded SLD worked');75 send(other, {description: pc.localDescription});76 } catch (e) {77 fail(e);78 } finally {79 makingOffer = false;80 }81 };82 window.onmessage = async ({data: {description, candidate, run}}) => {83 try {84 if (description) {85 // If we have a setRemoteDescription() answer operation pending, then86 // we will be "stable" by the time the next setRemoteDescription() is87 // executed, so we count this being stable when deciding whether to88 // ignore the offer.89 const isStable =90 pc.signalingState == 'stable' ||91 (pc.signalingState == 'have-local-offer' && srdAnswerPending);92 ignoreOffer =93 description.type == 'offer' && !polite && (makingOffer || !isStable);94 if (ignoreOffer) {95 log('glare - ignoring offer');96 return;97 }98 srdAnswerPending = description.type == 'answer';99 log(`SRD(${description.type})`);100 await pc.setRemoteDescription(description);101 srdAnswerPending = false;102 if (description.type == 'offer') {103 assert_equals(pc.signalingState, 'have-remote-offer', 'Remote offer');104 assert_equals(pc.remoteDescription.type, 'offer', 'SRD worked');105 log('SLD to get back to stable');106 await pc.setLocalDescription();107 assert_equals(pc.signalingState, 'stable', 'onmessage not racing with negotiationneeded');108 assert_equals(pc.localDescription.type, 'answer', 'onmessage SLD worked');109 send(other, {description: pc.localDescription});110 } else {111 assert_equals(pc.remoteDescription.type, 'answer', 'Answer was set');112 assert_equals(pc.signalingState, 'stable', 'answered');113 pc.dispatchEvent(new Event('negotiated'));114 }115 } else if (candidate) {116 try {117 await pc.addIceCandidate(candidate);118 } catch (e) {119 if (!ignoreOffer) throw e;120 }121 } else if (run) {122 send(window.parent, {[run.id]: await commands[run.cmd]() || 0});123 }124 } catch (e) {125 fail(e);126 }127 };128 } catch (e) {129 fail(e);130 }131 return pc;132}...
Using AI Code Generation
1function testTransceiver() {2 var pc1 = new RTCPeerConnection();3 var pc2 = new RTCPeerConnection();4 pc1.onicecandidate = e => pc2.addIceCandidate(e.candidate);5 pc2.onicecandidate = e => pc1.addIceCandidate(e.candidate);6 pc2.ontrack = e => document.getElementById('video').srcObject = e.streams[0];7 pc1.createTransceiver('video');8 navigator.mediaDevices.getUserMedia({video: true})9 .then(stream => pc1.addTrack(stream.getTracks()[0], stream))10 .then(() => pc1.createOffer())11 .then(offer => pc1.setLocalDescription(offer))12 .then(() => pc2.setRemoteDescription(pc1.localDescription))13 .then(() => pc2.createAnswer())14 .then(answer => pc2.setLocalDescription(answer))15 .then(() => pc1.setRemoteDescription(pc2.localDescription));16}17function testAddTransceiver() {18 var pc1 = new RTCPeerConnection();19 var pc2 = new RTCPeerConnection();20 pc1.onicecandidate = e => pc2.addIceCandidate(e.candidate);21 pc2.onicecandidate = e => pc1.addIceCandidate(e.candidate);22 pc2.ontrack = e => document.getElementById('video').srcObject = e.streams[0];23 navigator.mediaDevices.getUserMedia({video: true})24 .then(stream => pc1.addTrack(stream.getTracks()[0], stream))25 .then(() => pc1.addTransceiver('video'))26 .then(() => pc1.createOffer())27 .then(offer => pc1.setLocalDescription(offer))28 .then(() => pc2.setRemoteDescription(pc1.localDescription))29 .then(() => pc2.createAnswer())30 .then(answer => pc2.setLocalDescription(answer))31 .then(() => pc1.setRemoteDescription(pc2.localDescription));32}33function testAddTransceiverWithInit() {34 var pc1 = new RTCPeerConnection();35 var pc2 = new RTCPeerConnection();36 pc1.onicecandidate = e => pc2.addIceCandidate(e.candidate);37 pc2.onicecandidate = e => pc1.addIceCandidate(e.candidate);
Using AI Code Generation
1var wpt = require('webpagetest');2var webpagetest = new wpt('www.webpagetest.org');3}, function(err, data) {4 if (err) {5 console.log('Error: ' + err.message);6 }7 else {8 console.log('Test Results: ' + data.data.summary);9 }10});11var wpt = require('webpagetest');12var webpagetest = new wpt('www.webpagetest.org');13}, function(err, data) {14 if (err) {15 console.log('Error: ' + err.message);16 }17 else {18 console.log('Test Results: ' + data.data.summary);19 }20});21var wpt = require('webpagetest');22var webpagetest = new wpt('www.webpagetest.org');23}, function(err, data) {24 if (err) {25 console.log('Error: ' + err.message);26 }27 else {28 console.log('Test Results: ' + data.data.summary);29 }30});31var wpt = require('webpagetest');32var webpagetest = new wpt('www.webpagetest.org');33}, function(err, data) {34 if (err) {35 console.log('Error: ' + err.message);36 }37 else {38 console.log('
Using AI Code Generation
1var test = async_test('Test to check if the transceivers method of RTCPeerConnection returns an array of RTCRtpTransceiver objects');2var pc = new RTCPeerConnection();3test.step(function() {4 assert_array_equals(pc.getTransceivers(), [], 'The transceivers method should return an empty array');5 test.done();6});
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