// @flow import React, { Component } from 'react'; import JitsiMeetJS from '../../../../base/lib-jitsi-meet/_'; import AudioSettingsEntry, { type Props as AudioSettingsEntryProps } from './AudioSettingsEntry'; import Meter from './Meter'; const JitsiTrackEvents = JitsiMeetJS.events.track; type Props = AudioSettingsEntryProps & { /** * The deviceId of the microphone. */ deviceId: string, /** * Flag indicating if there is a problem with the device. */ hasError?: boolean, /** * The audio track for the current entry. */ jitsiTrack: Object, /** * Click handler for component. */ onClick: Function, } type State = { /** * The audio level. */ level: number, } /** * React {@code Component} representing an entry for the microphone audio settings. * * @param {Props} props - The props of the component. * @returns { ReactElement} */ export default class MicrophoneEntry extends Component { /** * Initializes a new {@code MicrophoneEntry} instance. * * @param {Object} props - The read-only properties with which the new * instance is to be initialized. */ constructor(props: Props) { super(props); this.state = { level: -1 }; this._onClick = this._onClick.bind(this); this._updateLevel = this._updateLevel.bind(this); } _onClick: () => void; /** * Click handler for the entry. * * @returns {void} */ _onClick() { this.props.onClick(this.props.deviceId); } _updateLevel: (number) => void; /** * Updates the level of the meter. * * @param {number} num - The audio level provided by the jitsiTrack. * @returns {void} */ _updateLevel(num) { this.setState({ level: Math.floor(num / 0.125) }); } /** * Subscribes to audio level chanages comming from the jitsiTrack. * * @returns {void} */ _startListening() { const { jitsiTrack } = this.props; jitsiTrack && jitsiTrack.on( JitsiTrackEvents.TRACK_AUDIO_LEVEL_CHANGED, this._updateLevel); } /** * Unsubscribes from chanages comming from the jitsiTrack. * * @param {Object} jitsiTrack - The jitsiTrack to unsubscribe from. * @returns {void} */ _stopListening(jitsiTrack) { jitsiTrack && jitsiTrack.off(JitsiTrackEvents.TRACK_AUDIO_LEVEL_CHANGED, this._updateLevel); this.setState({ level: -1 }); } /** * Implements React's {@link Component#componentDidUpdate}. * * @inheritdoc */ componentDidUpdate(prevProps: Props) { if (prevProps.jitsiTrack !== this.props.jitsiTrack) { this._stopListening(prevProps.jitsiTrack); this._startListening(); } } /** * Implements React's {@link Component#componentDidMount}. * * @inheritdoc */ componentDidMount() { this._startListening(); } /** * Implements React's {@link Component#componentWillUnmount}. * * @inheritdoc */ compmonentWillUnmount() { this._stopListening(this.props.jitsiTrack); } /** * Implements React's {@link Component#render}. * * @inheritdoc */ render() { const { children, hasError, isSelected } = this.props; return (
{children}
); } }