69 lines
2.0 KiB
JavaScript
69 lines
2.0 KiB
JavaScript
'use strict';
|
|
|
|
// Create an instance
|
|
var wavesurfer;
|
|
|
|
// Init & load audio file
|
|
document.addEventListener('DOMContentLoaded', function() {
|
|
// Init
|
|
wavesurfer = WaveSurfer.create({
|
|
container: document.querySelector('#waveform'),
|
|
minPxPerSec: 30,
|
|
scrollParent: true,
|
|
waveColor: '#A8DBA8',
|
|
progressColor: '#3B8686'
|
|
});
|
|
|
|
// Load audio from URL
|
|
wavesurfer.load('media.wav');
|
|
|
|
// Panner
|
|
(function() {
|
|
// Add panner
|
|
wavesurfer.panner = wavesurfer.backend.ac.createPanner();
|
|
wavesurfer.backend.setFilter(wavesurfer.panner);
|
|
|
|
// Bind panner slider
|
|
// @see http://stackoverflow.com/a/14412601/352796
|
|
let onChange = function() {
|
|
let xDeg = parseInt(slider.value);
|
|
const x = Math.sin(xDeg * (Math.PI / 180));
|
|
wavesurfer.panner.setPosition(x, 0, 0);
|
|
};
|
|
let slider = document.querySelector('[data-action="pan"]');
|
|
slider.addEventListener('input', onChange);
|
|
slider.addEventListener('change', onChange);
|
|
onChange();
|
|
})();
|
|
|
|
// Log errors
|
|
wavesurfer.on('error', function(msg) {
|
|
console.log(msg);
|
|
});
|
|
|
|
// Bind play/pause button
|
|
document
|
|
.querySelector('[data-action="play"]')
|
|
.addEventListener('click', wavesurfer.playPause.bind(wavesurfer));
|
|
|
|
// Progress bar
|
|
(function() {
|
|
const progressDiv = document.querySelector('#progress-bar');
|
|
const progressBar = progressDiv.querySelector('.progress-bar');
|
|
|
|
let showProgress = function(percent) {
|
|
progressDiv.style.display = 'block';
|
|
progressBar.style.width = percent + '%';
|
|
};
|
|
|
|
let hideProgress = function() {
|
|
progressDiv.style.display = 'none';
|
|
};
|
|
|
|
wavesurfer.on('loading', showProgress);
|
|
wavesurfer.on('ready', hideProgress);
|
|
wavesurfer.on('destroy', hideProgress);
|
|
wavesurfer.on('error', hideProgress);
|
|
})();
|
|
});
|