-
Notifications
You must be signed in to change notification settings - Fork 0
/
script.js
116 lines (89 loc) · 2.89 KB
/
script.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
const map = new mapboxgl.Map({
container: 'map',
style: 'https://basemaps.cartocdn.com/gl/dark-matter-gl-style/style.json',
center: [-0.15900444266446812, 39.83344428471585],
zoom: 5.2,
dragRotate: false,
touchZoomRotate: false
});
carto.setDefaultAuth({
user: 'elena-carto',
apiKey: 'default_public'
});
const source = new carto.source.Dataset('nightclubs_spain');
const viz = new carto.Viz(`
width: 15
strokeWidth: 8
strokeColor: opacity(blue, 0.9)
color: opacity(blue, 0.5)
`);
const layer = new carto.Layer('layer', source, viz);
layer.addTo(map, 'watername_ocean');
const file = document.getElementById("thefile");
const audio = document.getElementById("audio");
const context = new AudioContext();
let animationFrameId;
let src = context.createMediaElementSource(audio);
function loadSong(fileSrc, musicType) {
const FFT_SIZE = 256;
var analyser = context.createAnalyser();
var lastColor;
var lastWidth;
audio.src = fileSrc;
audio.crossOrigin = 'anonymous';
audio.load();
audio.play();
src.connect(analyser);
analyser.connect(context.destination);
analyser.fftSize = FFT_SIZE;
const bufferLength = analyser.frequencyBinCount;
const dataArray = new Uint8Array(bufferLength);
function startAnimation() {
animationFrameId = requestAnimationFrame(startAnimation);
analyser.getByteFrequencyData(dataArray);
var frequency = dataArray[10];
lastWidth = `linear(${frequency}, 0, 255) * 50`;
layer.viz.width.blendTo(lastWidth, 0);
layer.viz.filter.blendTo(`eq($music_type, '${musicType}') or false`, 0);
}
audio.addEventListener('play', onPlay);
audio.addEventListener('pause', onPause);
startAnimation();
};
function onPause() {
stopAnimation(animationFrameId);
}
function onPlay() {
audio.play();
}
function stopAnimation(animationFrameId) {
window.cancelAnimationFrame(animationFrameId)
layer.blendToViz(new carto.Viz(`
width: 15
strokeWidth: 8
strokeColor: opacity(blue, 0.9)
color: opacity(blue, 0.5)
`));
};
function stopSong(animationFrameId) {
if (animationFrameId) {
stopAnimation(animationFrameId);
audio.pause();
audio.currentTime = 0;
audio.removeEventListener('play', onPlay);
audio.removeEventListener('pause', onPause);
}
};
const $musicSelectorButtons = document.querySelectorAll('.button-music-selector');
$musicSelectorButtons.forEach(function ($button, index) {
$button.addEventListener('click', function (event) {
var musicType = event.target.getAttribute('data-music-type');
var audioFormat = event.target.getAttribute('data-music-format');
$musicSelectorButtons.forEach(function ($button) {
$button.classList.remove('selected');
});
$button.classList.add('selected');
stopSong(animationFrameId);
loadSong(`https://raw.githubusercontent.com/elenatorro/cartovl-music-visualizer/master/songs/${musicType}.${audioFormat}`, musicType);
});
});