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index.html
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<DOCTYPE html>
<html>
<head>
<title>OMY|ONE drum machine</title>
</head>
<body>
<div id="app">
<div>
<header>
<div id="logo">
<img src="img/omy-one-logo.png" title="OMY ONE">
</div>
<div class="current-pad">{{ currentPad + 1 }}</div>
</header>
<div id="tracks">
<div class="track" v-for="track in tracks">
<div class="pad" v-for="pad in track.pads" v-bind:class="{'active': pad.active, 'playing': pad.playing}" @click="setActive(track, pad);"></div>
</div>
</div>
<footer>
<div id="settings">
<div class="item stop">
<button @click="toggleFullscreen">FS</button>
<button @click="startStop">{{ isPlaying ? 'Stop' : 'Play' }}</button>
</div>
<div class="item tempo">
<label>Tempo:</label>
<input id="bpm-control" type="range" min="150" max="600" value="400" @change="setBPM">
<!-- <span id="bpm-value">{{ bpm }}</span> -->
</div>
</div>
</footer>
</div>
</div>
<style>
* {
box-sizing: border-box;
}
* {
-webkit-touch-callout: none;
-webkit-user-select: none;
-khtml-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
-webkit-tap-highlight-color: transparent;
}
html {
background-color: #020209;
color: #844aa3;
background-image: url('img/bg.png');
}
button {
border: 2px solid #844aa3;
border-radius: 3px;
background: #020209;
padding: 0;
color: #844aa3;
font-weight: bold;
cursor: pointer;
transition: all 0.1s ease;
}
button:active {
transform: translateY(2px);
}
body {
padding: 0;
margin: 0;
}
body .track + .track {
margin-top: 0.3vw;
}
header {
position: relative;
padding: 10px;
}
footer {
position: absolute;
bottom: 0;
left: 0;
width: 100%;
height: 100px;
padding: 10px;
}
#tracks {
position: absolute;
top: 50%;
transform: translateY(-50%);
width: 100%;
padding-left: 1.1vw;
}
.current-pad {
position: absolute;
top: 0;
right: 0;
}
.track {
display: grid;
grid-template-columns: 1fr 1fr 1fr 1fr 1fr 1fr 1fr 1fr 1fr 1fr 1fr 1fr 1fr 1fr 1fr 1fr;
}
.pad {
margin: 0.3vw;
width: 5vw;
height: 5vw;
border-radius: 3px;
background-color: #2c2c34;
cursor: pointer;
}
.pad:nth-child(1),
.pad:nth-child(5),
.pad:nth-child(9),
.pad:nth-child(13) {
background-color: #3d3d47;
}
.pad.active {
background-color: #764b9f;
}
.pad.playing {
background-color: #567051;
}
.pad.active.playing {
background-color: #99c554;
}
#settings {
position: relative;
}
input#bpm-control {
vertical-align: middle;
width: 55%;
background-color: #2c2c34;
}
.item.stop {
position: absolute;
top: 0;
right: 0;
}
.item.stop button {
width: 15vh;
max-width: 50px;
height: 15vh;
max-height: 50px;
}
.item.tempo {
width: 70%;
position: relative;
top: 9px;
}
input[type=range] {
-webkit-appearance: none;
width: 100%;
margin: 8.9px 0;
}
input[type=range]:focus {
outline: none;
}
input[type=range]::-webkit-slider-runnable-track {
width: 100%;
height: 6.2px;
cursor: pointer;
box-shadow: 1px 1px 1px #000000, 0px 0px 1px #0d0d0d;
background: #7671a9;
border-radius: 0.2px;
border: 0.2px solid #010101;
}
input[type=range]::-webkit-slider-thumb {
box-shadow: 1px 1px 1px #000000, 0px 0px 1px #0d0d0d;
border: 1px solid #000000;
height: 24px;
width: 33px;
border-radius: 3px;
background: #764b9f;
cursor: pointer;
-webkit-appearance: none;
margin-top: -9.1px;
}
input[type=range]:focus::-webkit-slider-runnable-track {
background: #8581b3;
}
input[type=range]::-moz-range-track {
width: 100%;
height: 6.2px;
cursor: pointer;
box-shadow: 1px 1px 1px #000000, 0px 0px 1px #0d0d0d;
background: #7671a9;
border-radius: 0.2px;
border: 0.2px solid #010101;
}
input[type=range]::-moz-range-thumb {
box-shadow: 1px 1px 1px #000000, 0px 0px 1px #0d0d0d;
border: 1px solid #000000;
height: 24px;
width: 33px;
border-radius: 3px;
background: #764b9f;
cursor: pointer;
}
input[type=range]::-ms-track {
width: 100%;
height: 6.2px;
cursor: pointer;
background: transparent;
border-color: transparent;
color: transparent;
}
input[type=range]::-ms-fill-lower {
background: #67619f;
border: 0.2px solid #010101;
border-radius: 0.4px;
box-shadow: 1px 1px 1px #000000, 0px 0px 1px #0d0d0d;
}
input[type=range]::-ms-fill-upper {
background: #7671a9;
border: 0.2px solid #010101;
border-radius: 0.4px;
box-shadow: 1px 1px 1px #000000, 0px 0px 1px #0d0d0d;
}
input[type=range]::-ms-thumb {
box-shadow: 1px 1px 1px #000000, 0px 0px 1px #0d0d0d;
border: 1px solid #000000;
height: 24px;
width: 33px;
border-radius: 3px;
background: #764b9f;
cursor: pointer;
height: 6.2px;
}
input[type=range]:focus::-ms-fill-lower {
background: #7671a9;
}
input[type=range]:focus::-ms-fill-upper {
background: #8581b3;
}
</style>
<script src="lib/vue.js"></script>
<script src="samples/samples.js"></script>
<script>
var Base64Binary = {
_keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
/* will return a Uint8Array type */
decodeArrayBuffer: function(input) {
var bytes = (input.length/4) * 3;
var ab = new ArrayBuffer(bytes);
this.decode(input, ab);
return ab;
},
removePaddingChars: function(input){
var lkey = this._keyStr.indexOf(input.charAt(input.length - 1));
if(lkey == 64){
return input.substring(0,input.length - 1);
}
return input;
},
decode: function (input, arrayBuffer) {
//get last chars to see if are valid
input = this.removePaddingChars(input);
input = this.removePaddingChars(input);
var bytes = parseInt((input.length / 4) * 3, 10);
var uarray;
var chr1, chr2, chr3;
var enc1, enc2, enc3, enc4;
var i = 0;
var j = 0;
if (arrayBuffer)
uarray = new Uint8Array(arrayBuffer);
else
uarray = new Uint8Array(bytes);
input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
for (i=0; i<bytes; i+=3) {
//get the 3 octects in 4 ascii chars
enc1 = this._keyStr.indexOf(input.charAt(j++));
enc2 = this._keyStr.indexOf(input.charAt(j++));
enc3 = this._keyStr.indexOf(input.charAt(j++));
enc4 = this._keyStr.indexOf(input.charAt(j++));
chr1 = (enc1 << 2) | (enc2 >> 4);
chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
chr3 = ((enc3 & 3) << 6) | enc4;
uarray[i] = chr1;
if (enc3 != 64) uarray[i+1] = chr2;
if (enc4 != 64) uarray[i+2] = chr3;
}
return uarray;
}
}
const context = new AudioContext() || new webkitAudioContext();
const soundBuffers = {};
const loadSamples = function () {
console.log(samples.hat)
const byteArrayHat = Base64Binary.decodeArrayBuffer(samples.hat);
const byteArraySnare = Base64Binary.decodeArrayBuffer(samples.snare);
const byteArrayBass = Base64Binary.decodeArrayBuffer(samples.bass);
context.decodeAudioData(byteArrayHat, function(buffer) {
soundBuffers['hat'] = buffer;
}, function(err) { console.log("err(decodeAudioData): "+err); });
context.decodeAudioData(byteArraySnare, function(buffer) {
soundBuffers['snare'] = buffer;
}, function(err) { console.log("err(decodeAudioData): "+err); });
context.decodeAudioData(byteArrayBass, function(buffer) {
soundBuffers['bass'] = buffer;
}, function(err) { console.log("err(decodeAudioData): "+err); });
}
const app = new Vue({
el: '#app',
data: {
bpm: 400,
tracks: [
// for example
{
sample: 'hat',
pads: [
{active: false, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: false, playing: false},
]
},
{
sample: 'snare',
pads: [
{active: false, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: false, playing: false},
]
},
{
sample: 'bass',
pads: [
{active: true, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: true, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: true, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: true, playing: false},
{active: false, playing: false},
{active: false, playing: false},
{active: false, playing: false},
]
},
],
numberOfTracks: 3,
numberOfPads: 16,
currentPad: -1,
timerId: 0,
isPlaying: false,
isFullscreen: false,
},
/* computed: {
tracks: function {
const tracks = [];
return tracks;
}
}, */
watch: {
currentPad: function (n) {
this.tracks.forEach(track => {
track.pads[n].playing = true;
if (track.pads[n].active) {
this.playSample(track.sample);
}
const previousN = n != 0 ? n - 1 : track.pads.length - 1;
track.pads[previousN].playing = false;
});
},
},
methods: {
addTrack: (numberOfPads) => {
const track = {
id: 0,
settings: {
color: gray,
},
pads: [],
};
for (let i = 0; i < numberOfPads; i++) {
track.pads.push(false);
}
this.tracks.push(track);
},
createTracks: function() {
for (let i = 0; i < this.numberOfTracks; i++) {
createTrack();
}
},
createTrack: function() {
const track = {
sound: null,
pads: [],
};
track.pads = [];
this.tracks.push(track);
},
shiftActivePad: function(n) {
this.currentPad = this.currentPad == this.numberOfPads - 1 ? 0 : ++this.currentPad;
},
runTimer: function() {
this.timerId = setInterval(() => {
this.shiftActivePad();
}, 1000 * 60 / this.bpm);
},
stopTimer: function() {
clearInterval(this.timerId);
},
setBPM: function(event) {
const bpm = event.target.value;
this.bpm = bpm;
if (this.isPlaying) {
this.stopTimer();
this.runTimer(bpm);
}
},
setActive: function(track, pad) {
pad.active = !pad.active;
if (pad.active && !this.isPlaying) {
this.playSample(track.sample);
}
},
startStop: function() {
this.isPlaying = !this.isPlaying;
this.isPlaying ? this.runTimer() : this.stopTimer();
},
playSample: function(sampleName) {
if (typeof soundBuffers[sampleName] !== 'undefined') {
const source = context.createBufferSource();
source.buffer = soundBuffers[sampleName];
const gainNode = context.createGain();
gainNode.gain.value = 0.4;
gainNode.connect(context.destination);
source.connect(gainNode);
source.start();
}
},
toggleFullscreen: function() {
if (this.isFullscreen) {
this.closeFullScreen();
this.isFullscreen = false;
} else {
this.openFullscreen();
this.isFullscreen = true;
}
},
openFullscreen: function () {
const elem = document.documentElement;
if (elem.requestFullscreen) {
elem.requestFullscreen();
} else if (elem.mozRequestFullScreen) {
elem.mozRequestFullScreen();
} else if (elem.webkitRequestFullscreen) {
elem.webkitRequestFullscreen();
} else if (elem.msRequestFullscreen) {
elem.msRequestFullscreen();
}
},
closeFullScreen: function () {
const elem = document.documentElement;
if (document.exitFullscreen) {
document.exitFullscreen();
} else if (document.mozCancelFullScreen) {
document.mozCancelFullScreen();
} else if (document.webkitExitFullscreen) {
document.webkitExitFullscreen();
} else if (document.msExitFullscreen) {
document.msExitFullscreen();
}
}
},
mounted: function() {
loadSamples();
this.startStop();
}
});
</script>
</body>
</html>