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bnplay-audio-tag.html
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<!doctype html>
<html>
<head>
<title>BNPlay - audio tag version</title>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<link rel="icon" href="favicon.png" />
<style type="text/css">
body,
td,
th {
font-family: sans-serif;
}
body {
background-color: #222;
color: #ccc;
}
.text-center {
text-align: center;
}
.btn-ctrl {
background-color: #000;
color: #ccc;
border: 1px solid #888;
padding: 20px 30px;
font-weight: bold;
}
.btn-ctrl-loading {
color: #c60;
border: 1px solid #f80;
}
</style>
<script type="text/javascript">
// Brown Noise Player
class BNP {
static switchMillis = 30_000;
static player1;
static player2;
static interval;
static switchPlayer() {
if (this.player1.paused && !this.player2.paused) {
// Player 2 is playing. Switch to player 1
this.player1.play();
this.player2.pause();
this.player2.currentTime = 0;
} else if (!this.player1.paused && this.player2.paused) {
// Player 1 is playing. Switch to player 2
this.player2.play();
this.player1.pause();
this.player1.currentTime = 0;
} else if (this.player1.paused && this.player2.paused) {
// No player is playing. Start one player
this.player1.currentTime = 0;
this.player1.play();
} else if (!this.player1.paused && !this.player2.paused) {
// Both players are playing (this should never happen). Leave
// only player 1 playing
this.player2.pause();
this.player2.currentTime = 0;
}
}
static initialize(player1, player2) {
this.player1 = player1;
this.player2 = player2;
}
static isPlaying() {
return !(this.player1.paused && this.player2.paused);
}
static play() {
if (this.isPlaying()) return;
this.player2.currentTime = 0;
this.player1.play();
this.interval = setInterval(this.switchPlayer, this.switchMillis);
}
static stop() {
if (!this.isPlaying()) return;
clearInterval(this.interval);
this.player1.pause();
this.player2.pause();
this.player1.currentTime = 0;
this.player2.currentTime = 0;
}
static toggle() {
if (this.isPlaying()) this.stop();
else this.play();
}
}
class UI {
static load() {
BNP.initialize(
document.getElementById("player1"),
document.getElementById("player2"),
);
const btnToggle = document.getElementById("btnToggle");
btnToggle.classList.remove("btn-ctrl-loading");
btnToggle.removeAttribute("disabled");
this.update();
}
static update() {
const btnToggle = document.getElementById("btnToggle"),
divStatus = document.getElementById("divStatus");
if (BNP.isPlaying()) {
divStatus.textContent = "Playing...";
btnToggle.value = "STOP";
} else {
divStatus.textContent = "Stopped.";
btnToggle.value = "PLAY";
}
}
static toggle() {
BNP.toggle();
this.update();
}
}
</script>
</head>
<body
onload="UI.load()"
onkeypress="if (event.key == ' ') btnToggle.click();"
>
<audio hidden id="player1">
<source src="https://dmotte.github.io/bnplay/bn-sample.flac" />
Your browser does not support the HTML5 audio element
</audio>
<audio hidden id="player2">
<source src="https://dmotte.github.io/bnplay/bn-sample.flac" />
Your browser does not support the HTML5 audio element
</audio>
<div class="text-center">
<h1>Brown noise</h1>
<p><i>Audio tag version</i></p>
<br />
<div id="divStatus">Please wait...</div>
<br />
<input
type="button"
id="btnToggle"
value="Loading..."
class="btn-ctrl btn-ctrl-loading"
onfocus="this.blur()"
onclick="UI.toggle()"
disabled="disabled"
/>
</div>
</body>
</html>