153 lines
6.2 KiB
HTML
153 lines
6.2 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<title>wavesurfer.js | MediaElementWebAudio backend Example</title>
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<link href="data:image/gif;" rel="icon" type="image/x-icon" />
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<!-- Bootstrap -->
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<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css" rel="stylesheet">
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<link rel="stylesheet" href="../css/style.css" />
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<link rel="stylesheet" href="../css/ribbon.css" />
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<link rel="screenshot" itemprop="screenshot" href="https://katspaugh.github.io/wavesurfer.js/example/screenshot.png" />
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<!-- wavesurfer.js -->
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<script src="../../dist/wavesurfer.js"></script>
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<script src="../../dist/plugin/wavesurfer.timeline.js"></script>
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<script src="../../dist/plugin/wavesurfer.regions.js"></script>
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<!-- Demo -->
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<script src="app.js"></script>
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<!-- highlight.js for syntax highlighting in this example -->
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<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.13.1/styles/default.min.css">
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<script src="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.13.1/highlight.min.js"></script>
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<script>hljs.initHighlightingOnLoad();</script>
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</head>
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<body itemscope itemtype="http://schema.org/WebApplication">
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<div class="container">
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<div class="header">
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<ul class="nav nav-pills pull-right">
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<li><a href="/"><i class="glyphicon glyphicon-home"></i></a></li>
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</ul>
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<h1 itemprop="name">MediaElementWebAudio Backend Example</h1>
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</div>
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<div id="demo">
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<div id="waveform">
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<!-- Here be the waveform -->
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</div>
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<div id="timeline"></div>
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<div class="controls">
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<div class="row">
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<div class="col-sm-7">
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<button class="btn btn-primary" data-action="play">
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<i class="glyphicon glyphicon-play"></i>
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Play
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/
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<i class="glyphicon glyphicon-pause"></i>
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Pause
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</button>
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</div>
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</div>
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<hr />
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<div class="row">
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<div class="row">
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<div class="col-sm-2">
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<p style="text-align: left">StereoPanner</p>
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</div>
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<div class="col-sm-3">
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← left
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</div>
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<div class="col-sm-4">
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<!-- Panner -->
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<input data-action="pan" type="range" min="-1" max="1" value="0" step="0.2" style="width: 100%" />
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</div>
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<div class="col-sm-3">
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right →
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</div>
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</div>
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<hr />
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<div class="row">
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<div class="col-sm-3" style="margin-right: 0">
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<p style="text-align: left">Left Channel Volume</p>
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</div>
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<div class="col-sm-3">
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<input data-action="leftVolume" type="range" min="0" max="1" value="0.8" step="0.2" style="width: 100%" />
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</div>
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<div class="col-sm-3">
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<p style="text-align: right">Right Channel Volume</p>
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</div>
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<div class="col-sm-3">
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<input data-action="rightVolume" type="range" min="0" max="1" value="0.8" step="0.2" style="width: 100%" />
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</div>
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</div>
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</div>
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</div>
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</div>
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<div class="row marketing">
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<h3>Why use MediaElementWebAudio backend</h3>
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<p style="text-align: justify">With this backend you can load a big audio file and use it with WebAudio API. In this example it was added a StereoPannerNode and
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nodes to control independently the volume of both right and left channels, realised with SplitterNode and MergerNode to split and then merge channels with GainNode to control their volume.
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</p>
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<hr />
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<p>
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<pre><code>
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var wavesurfer = WaveSurfer.create({
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container: document.querySelector('#wave'),
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backend: 'MediaElementWebAudio'
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});
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// You have to use the same methods of MediaElement backend to load the audio file, passing peaks
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wavesurfer.load('big_audio.mp3', normalizedPeaks, 11625);
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// Example for StereoPanner node
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wavesurfer.panner = wavesurfer.backend.ac.createStereoPanner();
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let sliderPanner = document.querySelector('[data-action="pan"]');
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sliderPanner.addEventListener('input', () => {
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wavesurfer.panner.pan.value = Number(sliderPanner.value);
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});
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wavesurfer.backend.setFilter(wavesurfer.panner)
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</code></pre>
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</p>
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</div>
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<div class="footer row">
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<div class="col-sm-12">
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<a rel="license" href="https://opensource.org/licenses/BSD-3-Clause"><img alt="BSD-3-Clause License" style="border-width:0" src="https://img.shields.io/badge/License-BSD%203--Clause-blue.svg" /></a>
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</div>
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<div class="col-sm-7">
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<span xmlns:dct="http://purl.org/dc/terms/" href="http://purl.org/dc/dcmitype/Text" property="dct:title" rel="dct:type">wavesurfer.js</span> by <a href="https://github.com/katspaugh/wavesurfer.js">katspaugh</a> is licensed under a <a style="white-space: nowrap" rel="license" href="https://opensource.org/licenses/BSD-3-Clause">BSD-3-Clause License</a>.
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</div>
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</div>
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</div>
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<div class="github-fork-ribbon-wrapper right">
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<div class="github-fork-ribbon">
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<a itemprop="isBasedOnUrl" href="https://github.com/katspaugh/wavesurfer.js">Fork me on GitHub</a>
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</div>
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</div>
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<script>
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(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
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(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
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m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
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})(window,document,'script','//www.google-analytics.com/analytics.js','ga');
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ga('create', 'UA-50026819-1', 'wavesurfer.fm');
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ga('send', 'pageview');
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</script>
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</body>
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</html>
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