[Glitch] Audio player visualization improvements
Port a2abe35e0f to glitch-soc
Signed-off-by: Thibaut Girka <thib@sitedethib.com>
This commit is contained in:
ThibG
Thibaut Girka
parent
e248399220
commit
0520273573
2 changed files with 148 additions and 146 deletions
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@ -7,11 +7,7 @@ import classNames from 'classnames';
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import { throttle } from 'lodash';
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import { getPointerPosition, fileNameFromURL } from 'flavours/glitch/features/video';
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import { debounce } from 'lodash';
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const hex2rgba = (hex, alpha = 1) => {
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const [r, g, b] = hex.match(/\w\w/g).map(x => parseInt(x, 16));
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return `rgba(${r}, ${g}, ${b}, ${alpha})`;
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};
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import Visualizer from './visualizer';
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const messages = defineMessages({
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play: { id: 'video.play', defaultMessage: 'Play' },
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@ -54,6 +50,11 @@ class Audio extends React.PureComponent {
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dragging: false,
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};
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constructor (props) {
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super(props);
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this.visualizer = new Visualizer(TICK_SIZE);
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}
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setPlayerRef = c => {
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this.player = c;
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@ -92,9 +93,7 @@ class Audio extends React.PureComponent {
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setCanvasRef = c => {
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this.canvas = c;
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if (c) {
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this.canvasContext = c.getContext('2d');
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}
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this.visualizer.setCanvas(c);
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}
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componentDidMount () {
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@ -247,17 +246,12 @@ class Audio extends React.PureComponent {
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_initAudioContext () {
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const context = new AudioContext();
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const analyser = context.createAnalyser();
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const source = context.createMediaElementSource(this.audio);
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analyser.smoothingTimeConstant = 0.6;
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analyser.fftSize = 2048;
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source.connect(analyser);
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this.visualizer.setAudioContext(context, source);
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source.connect(context.destination);
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this.audioContext = context;
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this.analyser = analyser;
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}
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handleDownload = () => {
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@ -290,20 +284,12 @@ class Audio extends React.PureComponent {
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});
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}
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_clear () {
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this.canvasContext.clearRect(0, 0, this.state.width, this.state.height);
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_clear() {
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this.visualizer.clear(this.state.width, this.state.height);
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}
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_draw () {
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this.canvasContext.save();
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const ticks = this._getTicks(360 * this._getScaleCoefficient(), TICK_SIZE);
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ticks.forEach(tick => {
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this._drawTick(tick.x1, tick.y1, tick.x2, tick.y2);
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});
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this.canvasContext.restore();
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_draw() {
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this.visualizer.draw(this._getCX(), this._getCY(), this._getAccentColor(), this._getRadius(), this._getScaleCoefficient());
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}
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_getRadius () {
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@ -314,126 +300,6 @@ class Audio extends React.PureComponent {
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return (this.state.height || this.props.height) / 982;
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}
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_getTicks (count, size, animationParams = [0, 90]) {
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const radius = this._getRadius();
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const ticks = this._getTickPoints(count);
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const lesser = 200;
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const m = [];
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const bufferLength = this.analyser ? this.analyser.frequencyBinCount : 0;
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const frequencyData = new Uint8Array(bufferLength);
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const allScales = [];
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const scaleCoefficient = this._getScaleCoefficient();
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if (this.analyser) {
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this.analyser.getByteFrequencyData(frequencyData);
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}
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ticks.forEach((tick, i) => {
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const coef = 1 - i / (ticks.length * 2.5);
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let delta = ((frequencyData[i] || 0) - lesser * coef) * scaleCoefficient;
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if (delta < 0) {
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delta = 0;
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}
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let k;
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if (animationParams[0] <= tick.angle && tick.angle <= animationParams[1]) {
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k = radius / (radius - this._getSize(tick.angle, animationParams[0], animationParams[1]) - delta);
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} else {
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k = radius / (radius - (size + delta));
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}
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const x1 = tick.x * (radius - size);
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const y1 = tick.y * (radius - size);
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const x2 = x1 * k;
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const y2 = y1 * k;
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m.push({ x1, y1, x2, y2 });
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if (i < 20) {
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let scale = delta / (200 * scaleCoefficient);
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scale = scale < 1 ? 1 : scale;
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allScales.push(scale);
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}
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});
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const scale = allScales.reduce((pv, cv) => pv + cv, 0) / allScales.length;
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return m.map(({ x1, y1, x2, y2 }) => ({
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x1: x1,
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y1: y1,
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x2: x2 * scale,
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y2: y2 * scale,
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}));
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}
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_getSize (angle, l, r) {
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const scaleCoefficient = this._getScaleCoefficient();
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const maxTickSize = TICK_SIZE * 9 * scaleCoefficient;
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const m = (r - l) / 2;
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const x = (angle - l);
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let h;
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if (x === m) {
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return maxTickSize;
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}
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const d = Math.abs(m - x);
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const v = 40 * Math.sqrt(1 / d);
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if (v > maxTickSize) {
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h = maxTickSize;
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} else {
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h = Math.max(TICK_SIZE, v);
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}
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return h;
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}
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_getTickPoints (count) {
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const PI = 360;
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const coords = [];
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const step = PI / count;
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let rad;
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for(let deg = 0; deg < PI; deg += step) {
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rad = deg * Math.PI / (PI / 2);
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coords.push({ x: Math.cos(rad), y: -Math.sin(rad), angle: deg });
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}
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return coords;
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}
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_drawTick (x1, y1, x2, y2) {
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const cx = this._getCX();
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const cy = this._getCY();
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const dx1 = Math.ceil(cx + x1);
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const dy1 = Math.ceil(cy + y1);
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const dx2 = Math.ceil(cx + x2);
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const dy2 = Math.ceil(cy + y2);
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const gradient = this.canvasContext.createLinearGradient(dx1, dy1, dx2, dy2);
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const mainColor = this._getAccentColor();
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const lastColor = hex2rgba(mainColor, 0);
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gradient.addColorStop(0, mainColor);
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gradient.addColorStop(0.6, mainColor);
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gradient.addColorStop(1, lastColor);
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this.canvasContext.beginPath();
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this.canvasContext.strokeStyle = gradient;
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this.canvasContext.lineWidth = 2;
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this.canvasContext.moveTo(dx1, dy1);
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this.canvasContext.lineTo(dx2, dy2);
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this.canvasContext.stroke();
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}
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_getCX() {
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return Math.floor(this.state.width / 2);
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}
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136
app/javascript/flavours/glitch/features/audio/visualizer.js
Normal file
136
app/javascript/flavours/glitch/features/audio/visualizer.js
Normal file
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@ -0,0 +1,136 @@
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/*
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Copyright (c) 2020 by Alex Permyakov (https://codepen.io/alexdevp/pen/RNELPV)
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Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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const hex2rgba = (hex, alpha = 1) => {
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const [r, g, b] = hex.match(/\w\w/g).map(x => parseInt(x, 16));
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return `rgba(${r}, ${g}, ${b}, ${alpha})`;
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};
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export default class Visualizer {
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constructor (tickSize) {
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this.tickSize = tickSize;
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}
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setCanvas(canvas) {
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this.canvas = canvas;
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if (canvas) {
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this.context = canvas.getContext('2d');
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}
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}
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setAudioContext(context, source) {
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const analyser = context.createAnalyser();
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analyser.smoothingTimeConstant = 0.6;
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analyser.fftSize = 2048;
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source.connect(analyser);
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this.analyser = analyser;
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}
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getTickPoints (count) {
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const coords = [];
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for(let i = 0; i < count; i++) {
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const rad = Math.PI * 2 * i / count;
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coords.push({ x: Math.cos(rad), y: -Math.sin(rad) });
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}
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return coords;
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}
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drawTick (cx, cy, mainColor, x1, y1, x2, y2) {
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const dx1 = Math.ceil(cx + x1);
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const dy1 = Math.ceil(cy + y1);
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const dx2 = Math.ceil(cx + x2);
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const dy2 = Math.ceil(cy + y2);
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const gradient = this.context.createLinearGradient(dx1, dy1, dx2, dy2);
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const lastColor = hex2rgba(mainColor, 0);
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gradient.addColorStop(0, mainColor);
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gradient.addColorStop(0.6, mainColor);
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gradient.addColorStop(1, lastColor);
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this.context.beginPath();
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this.context.strokeStyle = gradient;
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this.context.lineWidth = 2;
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this.context.moveTo(dx1, dy1);
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this.context.lineTo(dx2, dy2);
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this.context.stroke();
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}
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getTicks (count, size, radius, scaleCoefficient) {
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const ticks = this.getTickPoints(count);
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const lesser = 200;
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const m = [];
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const bufferLength = this.analyser ? this.analyser.frequencyBinCount : 0;
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const frequencyData = new Uint8Array(bufferLength);
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const allScales = [];
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if (this.analyser) {
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this.analyser.getByteFrequencyData(frequencyData);
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}
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ticks.forEach((tick, i) => {
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const coef = 1 - i / (ticks.length * 2.5);
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let delta = ((frequencyData[i] || 0) - lesser * coef) * scaleCoefficient;
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if (delta < 0) {
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delta = 0;
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}
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const k = radius / (radius - (size + delta));
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const x1 = tick.x * (radius - size);
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const y1 = tick.y * (radius - size);
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const x2 = x1 * k;
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const y2 = y1 * k;
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m.push({ x1, y1, x2, y2 });
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if (i < 20) {
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let scale = delta / (200 * scaleCoefficient);
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scale = scale < 1 ? 1 : scale;
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allScales.push(scale);
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}
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});
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const scale = allScales.reduce((pv, cv) => pv + cv, 0) / allScales.length;
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return m.map(({ x1, y1, x2, y2 }) => ({
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x1: x1,
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y1: y1,
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x2: x2 * scale,
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y2: y2 * scale,
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}));
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}
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clear (width, height) {
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this.context.clearRect(0, 0, width, height);
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}
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draw (cx, cy, color, radius, coefficient) {
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this.context.save();
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const ticks = this.getTicks(parseInt(360 * coefficient), this.tickSize, radius, coefficient);
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ticks.forEach(tick => {
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this.drawTick(cx, cy, color, tick.x1, tick.y1, tick.x2, tick.y2);
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});
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this.context.restore();
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}
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}
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