Dynamic audio level indicator

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Fedor Indutny 2022-05-18 20:28:51 -07:00 committed by GitHub
parent ac59dec5aa
commit e6223b6a11
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24 changed files with 323 additions and 123 deletions

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@ -4,23 +4,112 @@
import classNames from 'classnames';
import { noop } from 'lodash';
import type { ReactElement } from 'react';
import React, { useEffect, useState } from 'react';
import animationData from '../../images/lottie-animations/CallingSpeakingIndicator.json';
import { Lottie } from './Lottie';
import React, { useEffect, useCallback, useState } from 'react';
import { useSpring, animated } from '@react-spring/web';
const SPEAKING_LINGER_MS = 100;
import { AUDIO_LEVEL_INTERVAL_MS } from '../calling/constants';
import { missingCaseError } from '../util/missingCaseError';
const SPEAKING_LINGER_MS = 500;
const BASE_CLASS_NAME = 'CallingAudioIndicator';
const CONTENT_CLASS_NAME = `${BASE_CLASS_NAME}__content`;
export function CallingAudioIndicator({
hasAudio,
isSpeaking,
}: Readonly<{ hasAudio: boolean; isSpeaking: boolean }>): ReactElement {
const [shouldShowSpeaking, setShouldShowSpeaking] = useState(isSpeaking);
const MIN_BAR_HEIGHT = 2;
const SIDE_SCALE_FACTOR = 0.75;
const MAX_CENTRAL_BAR_DELTA = 9;
/* Should match css */
const CONTENT_WIDTH = 14;
const CONTENT_HEIGHT = 14;
const BAR_WIDTH = 2;
const CONTENT_PADDING = 1;
enum BarPosition {
Left,
Center,
Right,
}
function generateBarPath(position: BarPosition, audioLevel: number): string {
let x: number;
if (position === BarPosition.Left) {
x = CONTENT_PADDING;
} else if (position === BarPosition.Center) {
x = CONTENT_WIDTH / 2 - CONTENT_PADDING;
} else if (position === BarPosition.Right) {
x = CONTENT_WIDTH - CONTENT_PADDING - BAR_WIDTH;
} else {
throw missingCaseError(position);
}
let height: number;
if (position === BarPosition.Left || position === BarPosition.Right) {
height =
MIN_BAR_HEIGHT + audioLevel * MAX_CENTRAL_BAR_DELTA * SIDE_SCALE_FACTOR;
} else if (position === BarPosition.Center) {
height = MIN_BAR_HEIGHT + audioLevel * MAX_CENTRAL_BAR_DELTA;
} else {
throw missingCaseError(position);
}
// Take the round corners off the height
height -= 2;
const y = (CONTENT_HEIGHT - height) / 2;
const top = y;
const bottom = top + height;
return (
`M ${x} ${top} ` +
`L ${x} ${bottom} ` +
`A 0.5 0.5 0 0 0 ${x + BAR_WIDTH} ${bottom} ` +
`L ${x + BAR_WIDTH} ${top} ` +
`A 0.5 0.5 0 0 0 ${x} ${top}`
);
}
function Bar({
position,
audioLevel,
}: {
position: BarPosition;
audioLevel: number;
}): ReactElement {
const animatedProps = useSpring({
from: { audioLevel: 0 },
config: { duration: AUDIO_LEVEL_INTERVAL_MS },
});
const levelToPath = useCallback(
(animatedLevel: number): string => {
return generateBarPath(position, animatedLevel);
},
[position]
);
useEffect(() => {
if (isSpeaking) {
animatedProps.audioLevel.stop();
animatedProps.audioLevel.start(audioLevel);
}, [audioLevel, animatedProps]);
return (
<animated.path
d={animatedProps.audioLevel.to(levelToPath)}
fill="#ffffff"
/>
);
}
export function CallingAudioIndicator({
hasAudio,
audioLevel,
}: Readonly<{ hasAudio: boolean; audioLevel: number }>): ReactElement {
const [shouldShowSpeaking, setShouldShowSpeaking] = useState(audioLevel > 0);
useEffect(() => {
if (audioLevel > 0) {
setShouldShowSpeaking(true);
} else if (shouldShowSpeaking) {
const timeout = setTimeout(() => {
@ -31,7 +120,7 @@ export function CallingAudioIndicator({
};
}
return noop;
}, [isSpeaking, shouldShowSpeaking]);
}, [audioLevel, shouldShowSpeaking]);
if (!hasAudio) {
return (
@ -59,7 +148,11 @@ export function CallingAudioIndicator({
`${BASE_CLASS_NAME}--with-content`
)}
>
<Lottie animationData={animationData} className={CONTENT_CLASS_NAME} />
<svg className={CONTENT_CLASS_NAME}>
<Bar position={BarPosition.Left} audioLevel={audioLevel} />
<Bar position={BarPosition.Center} audioLevel={audioLevel} />
<Bar position={BarPosition.Right} audioLevel={audioLevel} />
</svg>
</div>
);
}