82 lines
3 KiB
TypeScript
82 lines
3 KiB
TypeScript
/*
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Copyright 2021 The Matrix.org Foundation C.I.C.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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import React from "react";
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import Clock from "./Clock";
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import { Playback, PlaybackState } from "../../../audio/Playback";
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import { UPDATE_EVENT } from "../../../stores/AsyncStore";
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interface IProps {
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playback: Playback;
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// The default number of seconds to show when the playback has completed or
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// has not started. Not used during playback, even when paused. Defaults to
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// clip duration length.
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defaultDisplaySeconds?: number;
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}
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interface IState {
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seconds: number;
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durationSeconds: number;
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playbackPhase: PlaybackState;
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}
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/**
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* A clock for a playback of a recording.
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*/
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export default class PlaybackClock extends React.PureComponent<IProps, IState> {
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public constructor(props) {
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super(props);
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this.state = {
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seconds: this.props.playback.clockInfo.timeSeconds,
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// we track the duration on state because we won't really know what the clip duration
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// is until the first time update, and as a PureComponent we are trying to dedupe state
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// updates as much as possible. This is just the easiest way to avoid a forceUpdate() or
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// member property to track "did we get a duration".
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durationSeconds: this.props.playback.clockInfo.durationSeconds,
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playbackPhase: PlaybackState.Stopped, // assume not started, so full clock
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};
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this.props.playback.on(UPDATE_EVENT, this.onPlaybackUpdate);
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this.props.playback.clockInfo.liveData.onUpdate(this.onTimeUpdate);
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}
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private onPlaybackUpdate = (ev: PlaybackState) => {
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// Convert Decoding -> Stopped because we don't care about the distinction here
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if (ev === PlaybackState.Decoding) ev = PlaybackState.Stopped;
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this.setState({ playbackPhase: ev });
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};
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private onTimeUpdate = (time: number[]) => {
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this.setState({ seconds: time[0], durationSeconds: time[1] });
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};
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public render() {
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let seconds = this.state.seconds;
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if (this.state.playbackPhase === PlaybackState.Stopped) {
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if (Number.isFinite(this.props.defaultDisplaySeconds)) {
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seconds = this.props.defaultDisplaySeconds;
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} else {
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seconds = this.state.durationSeconds;
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}
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}
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return <Clock
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seconds={seconds}
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aria-live={this.state.playbackPhase === PlaybackState.Playing ? "off" : undefined}
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/>;
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}
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}
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