web-dictaphone
parent
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commit
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*~
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__pycache__
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Source: https://github.com/mdn/web-dictaphone/
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* {
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margin: 0;
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padding: 0;
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box-sizing: border-box;
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}
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html, body {
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height: 100%;
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}
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body {
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font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
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font-size: 0.8rem;
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}
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.wrapper {
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height: 100%;
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display: flex;
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flex-direction: column;
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}
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h1, h2 {
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font-size: 2rem;
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text-align: center;
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font-weight: normal;
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padding: 0.5rem 0 0 0;
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}
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.main-controls {
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padding: 0.5rem 0;
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}
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canvas {
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display: block;
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margin-bottom: 0.5rem;
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}
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#buttons {
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display: flex;
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flex-direction: row;
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justify-content: space-between;
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}
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#buttons button {
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font-size: 1rem;
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padding: 1rem;
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width: calc(50% - 0.25rem);
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}
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button {
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font-size: 1rem;
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background: #0088cc;
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text-align: center;
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color: white;
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border: none;
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transition: all 0.2s;
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padding: 0.5rem;
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}
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button:hover, button:focus {
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box-shadow: inset 0px 0px 10px rgba(255, 255, 255, 1);
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background: #0ae;
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}
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button:active {
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box-shadow: inset 0px 0px 20px rgba(0,0,0,0.5);
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transform: translateY(2px);
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}
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/* Make the clips use as much space as possible, and
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* also show a scrollbar when there are too many clips to show
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* in the available space */
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.sound-clips {
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flex: 1;
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overflow: auto;
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}
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section, article {
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display: block;
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}
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.clip {
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padding-bottom: 1rem;
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}
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audio {
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width: 100%;
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display: block;
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margin: 1rem auto 0.5rem;
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}
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.clip p {
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display: inline-block;
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font-size: 1rem;
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}
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.clip button {
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font-size: 1rem;
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float: right;
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}
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button.delete {
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background: #f00;
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padding: 0.5rem 0.75rem;
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font-size: 0.8rem;
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}
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/* Checkbox hack to control information box display */
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label {
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font-size: 3rem;
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position: absolute;
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top: 2px;
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right: 3px;
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z-index: 5;
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cursor: pointer;
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background-color: black;
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border-radius: 10px;
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}
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input[type=checkbox] {
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position: absolute;
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top: -100px;
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}
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aside {
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position: fixed;
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top: 0;
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left: 0;
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width: 100%;
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height: 100%;
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transform: translateX(100%);
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transition: 0.3s all ease-out;
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background-color: #efefef;
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padding: 1rem;
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}
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aside p {
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font-size: 1.2rem;
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margin: 0.5rem 0;
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}
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aside a {
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color: #666;
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}
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/* Toggled State of information box */
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input[type=checkbox]:checked ~ aside {
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transform: translateX(0);
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}
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/* Cursor when clip name is clicked over */
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.clip p {
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cursor: pointer;
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}
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/* Adjustments for wider screens */
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@media all and (min-width: 800px) {
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/* Don't take all the space as readability is lost when line length
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goes past a certain size */
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.wrapper {
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width: 90%;
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max-width: 1000px;
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margin: 0 auto;
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}
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}
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<!DOCTYPE html>
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<html lang="en-us">
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width">
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<title>Web dictaphone</title>
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<link href="web-dictaphone.css" rel="stylesheet" type="text/css">
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</head>
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<body>
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<div class="wrapper">
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<header>
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<h1>Web dictaphone</h1>
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</header>
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<section class="main-controls">
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<canvas class="visualizer" height="60px"></canvas>
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<div id="buttons">
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<button class="record">Record</button>
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<button class="stop">Stop</button>
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</div>
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</section>
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<section class="sound-clips">
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</section>
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</div>
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<label for="toggle">❔</label>
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<input type="checkbox" id="toggle">
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<aside>
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<h2>Information</h2>
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<p><a href="https://github.com/mdn/web-dictaphone/">Web dictaphone</a> is built using <a href="https://developer.mozilla.org/en-US/docs/Web/API/Navigator.getUserMedia">getUserMedia</a> and the <a href="https://developer.mozilla.org/en-US/docs/Web/API/MediaRecorder_API">MediaRecorder API</a>, which provides an easier way to capture Media streams.</p>
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<p>Icon courtesy of <a href="http://findicons.com/search/microphone">Find Icons</a>. Thanks to <a href="http://soledadpenades.com/">Sole</a> for the Oscilloscope code!</p>
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</aside>
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<script src="web-dictaphone.js"></script>
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</body>
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</html>
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// set up basic variables for app
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const record = document.querySelector('.record');
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const stop = document.querySelector('.stop');
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const soundClips = document.querySelector('.sound-clips');
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const canvas = document.querySelector('.visualizer');
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const mainSection = document.querySelector('.main-controls');
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// disable stop button while not recording
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stop.disabled = true;
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// visualiser setup - create web audio api context and canvas
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let audioCtx;
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const canvasCtx = canvas.getContext("2d");
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//main block for doing the audio recording
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if (navigator.mediaDevices.getUserMedia) {
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console.log('getUserMedia supported.');
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const constraints = { audio: true };
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let chunks = [];
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let onSuccess = function(stream) {
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const mediaRecorder = new MediaRecorder(stream);
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visualize(stream);
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record.onclick = function() {
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mediaRecorder.start();
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console.log(mediaRecorder.state);
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console.log("recorder started");
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record.style.background = "red";
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stop.disabled = false;
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record.disabled = true;
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}
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stop.onclick = function() {
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mediaRecorder.stop();
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console.log(mediaRecorder.state);
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console.log("recorder stopped");
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record.style.background = "";
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record.style.color = "";
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// mediaRecorder.requestData();
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stop.disabled = true;
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record.disabled = false;
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}
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mediaRecorder.onstop = function(e) {
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console.log("data available after MediaRecorder.stop() called.");
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const clipName = prompt('Enter a name for your sound clip?','My unnamed clip');
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const clipContainer = document.createElement('article');
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const clipLabel = document.createElement('p');
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const audio = document.createElement('audio');
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const deleteButton = document.createElement('button');
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clipContainer.classList.add('clip');
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audio.setAttribute('controls', '');
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deleteButton.textContent = 'Delete';
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deleteButton.className = 'delete';
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if(clipName === null) {
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clipLabel.textContent = 'My unnamed clip';
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} else {
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clipLabel.textContent = clipName;
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}
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clipContainer.appendChild(audio);
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clipContainer.appendChild(clipLabel);
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clipContainer.appendChild(deleteButton);
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soundClips.appendChild(clipContainer);
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audio.controls = true;
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const blob = new Blob(chunks, { 'type' : 'audio/ogg; codecs=opus' });
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chunks = [];
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const audioURL = window.URL.createObjectURL(blob);
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audio.src = audioURL;
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console.log("recorder stopped");
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deleteButton.onclick = function(e) {
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let evtTgt = e.target;
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evtTgt.parentNode.parentNode.removeChild(evtTgt.parentNode);
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}
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clipLabel.onclick = function() {
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const existingName = clipLabel.textContent;
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const newClipName = prompt('Enter a new name for your sound clip?');
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if(newClipName === null) {
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clipLabel.textContent = existingName;
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} else {
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clipLabel.textContent = newClipName;
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}
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}
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}
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mediaRecorder.ondataavailable = function(e) {
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// console.log("dataavailable", e);
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chunks.push(e.data);
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}
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}
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let onError = function(err) {
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console.log('The following error occured: ' + err);
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}
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navigator.mediaDevices.getUserMedia(constraints).then(onSuccess, onError);
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} else {
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console.log('getUserMedia not supported on your browser!');
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}
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function visualize(stream) {
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if(!audioCtx) {
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audioCtx = new AudioContext();
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}
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const source = audioCtx.createMediaStreamSource(stream);
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const analyser = audioCtx.createAnalyser();
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analyser.fftSize = 2048;
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const bufferLength = analyser.frequencyBinCount;
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const dataArray = new Uint8Array(bufferLength);
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source.connect(analyser);
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//analyser.connect(audioCtx.destination);
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draw()
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function draw() {
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const WIDTH = canvas.width
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const HEIGHT = canvas.height;
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requestAnimationFrame(draw);
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analyser.getByteTimeDomainData(dataArray);
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canvasCtx.fillStyle = 'rgb(200, 200, 200)';
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canvasCtx.fillRect(0, 0, WIDTH, HEIGHT);
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canvasCtx.lineWidth = 2;
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canvasCtx.strokeStyle = 'rgb(0, 0, 0)';
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canvasCtx.beginPath();
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let sliceWidth = WIDTH * 1.0 / bufferLength;
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let x = 0;
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for(let i = 0; i < bufferLength; i++) {
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let v = dataArray[i] / 128.0;
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let y = v * HEIGHT/2;
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if(i === 0) {
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canvasCtx.moveTo(x, y);
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} else {
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canvasCtx.lineTo(x, y);
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}
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x += sliceWidth;
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}
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canvasCtx.lineTo(canvas.width, canvas.height/2);
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canvasCtx.stroke();
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}
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}
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window.onresize = function() {
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canvas.width = mainSection.offsetWidth;
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}
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window.onresize();
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