matrix-js-sdk
Version:
Matrix Client-Server SDK for Javascript
289 lines (277 loc) • 10.5 kB
JavaScript
import _defineProperty from "@babel/runtime/helpers/defineProperty";
/*
Copyright 2021 Šimon Brandner <simon.bra.ag@gmail.com>
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.
*/
import { SDPStreamMetadataPurpose } from "./callEventTypes.js";
import { acquireContext, releaseContext } from "./audioContext.js";
import { logger } from "../logger.js";
import { TypedEventEmitter } from "../models/typed-event-emitter.js";
import { CallEvent, CallState } from "./call.js";
var POLLING_INTERVAL = 200; // ms
export var SPEAKING_THRESHOLD = -60; // dB
var SPEAKING_SAMPLE_COUNT = 8; // samples
export var CallFeedEvent = /*#__PURE__*/function (CallFeedEvent) {
CallFeedEvent["NewStream"] = "new_stream";
CallFeedEvent["MuteStateChanged"] = "mute_state_changed";
CallFeedEvent["LocalVolumeChanged"] = "local_volume_changed";
CallFeedEvent["VolumeChanged"] = "volume_changed";
CallFeedEvent["ConnectedChanged"] = "connected_changed";
CallFeedEvent["Speaking"] = "speaking";
CallFeedEvent["Disposed"] = "disposed";
return CallFeedEvent;
}({});
export class CallFeed extends TypedEventEmitter {
constructor(opts) {
super();
_defineProperty(this, "stream", void 0);
_defineProperty(this, "sdpMetadataStreamId", void 0);
_defineProperty(this, "userId", void 0);
_defineProperty(this, "deviceId", void 0);
_defineProperty(this, "purpose", void 0);
_defineProperty(this, "speakingVolumeSamples", void 0);
_defineProperty(this, "client", void 0);
_defineProperty(this, "call", void 0);
_defineProperty(this, "roomId", void 0);
_defineProperty(this, "audioMuted", void 0);
_defineProperty(this, "videoMuted", void 0);
_defineProperty(this, "localVolume", 1);
_defineProperty(this, "measuringVolumeActivity", false);
_defineProperty(this, "audioContext", void 0);
_defineProperty(this, "analyser", void 0);
_defineProperty(this, "frequencyBinCount", void 0);
_defineProperty(this, "speakingThreshold", SPEAKING_THRESHOLD);
_defineProperty(this, "speaking", false);
_defineProperty(this, "volumeLooperTimeout", void 0);
_defineProperty(this, "_disposed", false);
_defineProperty(this, "_connected", false);
_defineProperty(this, "onAddTrack", () => {
this.emit(CallFeedEvent.NewStream, this.stream);
});
_defineProperty(this, "onCallState", state => {
if (state === CallState.Connected) {
this.connected = true;
} else if (state === CallState.Connecting) {
this.connected = false;
}
});
_defineProperty(this, "volumeLooper", () => {
if (!this.analyser) return;
if (!this.measuringVolumeActivity) return;
this.analyser.getFloatFrequencyData(this.frequencyBinCount);
var maxVolume = -Infinity;
for (var volume of this.frequencyBinCount) {
if (volume > maxVolume) {
maxVolume = volume;
}
}
this.speakingVolumeSamples.shift();
this.speakingVolumeSamples.push(maxVolume);
this.emit(CallFeedEvent.VolumeChanged, maxVolume);
var newSpeaking = false;
for (var _volume of this.speakingVolumeSamples) {
if (_volume > this.speakingThreshold) {
newSpeaking = true;
break;
}
}
if (this.speaking !== newSpeaking) {
this.speaking = newSpeaking;
this.emit(CallFeedEvent.Speaking, this.speaking);
}
this.volumeLooperTimeout = setTimeout(this.volumeLooper, POLLING_INTERVAL);
});
this.client = opts.client;
this.call = opts.call;
this.roomId = opts.roomId;
this.userId = opts.userId;
this.deviceId = opts.deviceId;
this.purpose = opts.purpose;
this.audioMuted = opts.audioMuted;
this.videoMuted = opts.videoMuted;
this.speakingVolumeSamples = new Array(SPEAKING_SAMPLE_COUNT).fill(-Infinity);
this.sdpMetadataStreamId = opts.stream.id;
this.updateStream(null, opts.stream);
this.stream = opts.stream; // updateStream does this, but this makes TS happier
if (this.hasAudioTrack) {
this.initVolumeMeasuring();
}
if (opts.call) {
opts.call.addListener(CallEvent.State, this.onCallState);
this.onCallState(opts.call.state);
}
}
get connected() {
// Local feeds are always considered connected
return this.isLocal() || this._connected;
}
set connected(connected) {
this._connected = connected;
this.emit(CallFeedEvent.ConnectedChanged, this.connected);
}
get hasAudioTrack() {
return this.stream.getAudioTracks().length > 0;
}
updateStream(oldStream, newStream) {
if (newStream === oldStream) return;
var wasMeasuringVolumeActivity = this.measuringVolumeActivity;
if (oldStream) {
oldStream.removeEventListener("addtrack", this.onAddTrack);
this.measureVolumeActivity(false);
}
this.stream = newStream;
newStream.addEventListener("addtrack", this.onAddTrack);
if (this.hasAudioTrack) {
this.initVolumeMeasuring();
if (wasMeasuringVolumeActivity) this.measureVolumeActivity(true);
} else {
this.measureVolumeActivity(false);
}
this.emit(CallFeedEvent.NewStream, this.stream);
}
initVolumeMeasuring() {
if (!this.hasAudioTrack) return;
if (!this.audioContext) this.audioContext = acquireContext();
this.analyser = this.audioContext.createAnalyser();
this.analyser.fftSize = 512;
this.analyser.smoothingTimeConstant = 0.1;
var mediaStreamAudioSourceNode = this.audioContext.createMediaStreamSource(this.stream);
mediaStreamAudioSourceNode.connect(this.analyser);
this.frequencyBinCount = new Float32Array(this.analyser.frequencyBinCount);
}
/**
* Returns callRoom member
* @returns member of the callRoom
*/
getMember() {
var _callRoom$getMember;
var callRoom = this.client.getRoom(this.roomId);
return (_callRoom$getMember = callRoom === null || callRoom === void 0 ? void 0 : callRoom.getMember(this.userId)) !== null && _callRoom$getMember !== void 0 ? _callRoom$getMember : null;
}
/**
* Returns true if CallFeed is local, otherwise returns false
* @returns is local?
*/
isLocal() {
return this.userId === this.client.getUserId() && (this.deviceId === undefined || this.deviceId === this.client.getDeviceId());
}
/**
* Returns true if audio is muted or if there are no audio
* tracks, otherwise returns false
* @returns is audio muted?
*/
isAudioMuted() {
return this.stream.getAudioTracks().length === 0 || this.audioMuted;
}
/**
* Returns true video is muted or if there are no video
* tracks, otherwise returns false
* @returns is video muted?
*/
isVideoMuted() {
// We assume only one video track
return this.stream.getVideoTracks().length === 0 || this.videoMuted;
}
isSpeaking() {
return this.speaking;
}
/**
* Replaces the current MediaStream with a new one.
* The stream will be different and new stream as remote parties are
* concerned, but this can be used for convenience locally to set up
* volume listeners automatically on the new stream etc.
* @param newStream - new stream with which to replace the current one
*/
setNewStream(newStream) {
this.updateStream(this.stream, newStream);
}
/**
* Set one or both of feed's internal audio and video video mute state
* Either value may be null to leave it as-is
* @param audioMuted - is the feed's audio muted?
* @param videoMuted - is the feed's video muted?
*/
setAudioVideoMuted(audioMuted, videoMuted) {
if (audioMuted !== null) {
if (this.audioMuted !== audioMuted) {
this.speakingVolumeSamples.fill(-Infinity);
}
this.audioMuted = audioMuted;
}
if (videoMuted !== null) this.videoMuted = videoMuted;
this.emit(CallFeedEvent.MuteStateChanged, this.audioMuted, this.videoMuted);
}
/**
* Starts emitting volume_changed events where the emitter value is in decibels
* @param enabled - emit volume changes
*/
measureVolumeActivity(enabled) {
if (enabled) {
if (!this.analyser || !this.frequencyBinCount || !this.hasAudioTrack) return;
this.measuringVolumeActivity = true;
this.volumeLooper();
} else {
this.measuringVolumeActivity = false;
this.speakingVolumeSamples.fill(-Infinity);
this.emit(CallFeedEvent.VolumeChanged, -Infinity);
}
}
setSpeakingThreshold(threshold) {
this.speakingThreshold = threshold;
}
clone() {
var mediaHandler = this.client.getMediaHandler();
var stream = this.stream.clone();
logger.log("CallFeed clone() cloning stream (originalStreamId=".concat(this.stream.id, ", newStreamId").concat(stream.id, ")"));
if (this.purpose === SDPStreamMetadataPurpose.Usermedia) {
mediaHandler.userMediaStreams.push(stream);
} else {
mediaHandler.screensharingStreams.push(stream);
}
return new CallFeed({
client: this.client,
roomId: this.roomId,
userId: this.userId,
deviceId: this.deviceId,
stream,
purpose: this.purpose,
audioMuted: this.audioMuted,
videoMuted: this.videoMuted
});
}
dispose() {
var _this$stream, _this$call;
clearTimeout(this.volumeLooperTimeout);
(_this$stream = this.stream) === null || _this$stream === void 0 || _this$stream.removeEventListener("addtrack", this.onAddTrack);
(_this$call = this.call) === null || _this$call === void 0 || _this$call.removeListener(CallEvent.State, this.onCallState);
if (this.audioContext) {
this.audioContext = undefined;
this.analyser = undefined;
releaseContext();
}
this._disposed = true;
this.emit(CallFeedEvent.Disposed);
}
get disposed() {
return this._disposed;
}
set disposed(value) {
this._disposed = value;
}
getLocalVolume() {
return this.localVolume;
}
setLocalVolume(localVolume) {
this.localVolume = localVolume;
this.emit(CallFeedEvent.LocalVolumeChanged, localVolume);
}
}
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