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Fix decode audio recorded by Apple's Telegram
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,196 @@ | ||
| <!DOCTYPE html> | ||
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| <html> | ||
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| <head> | ||
| <meta name="viewport" content="width=device-width, initial-scale=1"> | ||
| <title>Decode Example</title> | ||
| <style type="text/css"> | ||
| ul { list-style: none; } | ||
| li { margin: 1em; } | ||
| audio { display: block; } | ||
| </style> | ||
| </head> | ||
|
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| <body> | ||
| <h1>Decoder Example</h1> | ||
| <p>Choose either a file from disk, or a file from a server.</p> | ||
| <p>File is decoded to pcm buffers and then played back as Riff</p> | ||
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| <h2>Options</h2> | ||
|
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| <div> | ||
| <label>Decoder output sample rate</label> | ||
| <input id="sampleRate" type="number" value="48000" /> | ||
| </div> | ||
|
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| <div> | ||
| <label>Wave file bit depth</label> | ||
| <input id="bitDepth" type="number" value="16" /> | ||
| </div> | ||
|
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| <h2>Commands</h2> | ||
| <input type="file" id="fileInput"/> | ||
| <button type="button" id="remoteButton">Load using XMLHttpRequest</button> | ||
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| <h2>Recordings</h2> | ||
| <ul id="recordingslist"></ul> | ||
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| <script> | ||
| function decodeOgg(arrayBuffer){ | ||
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| var typedArray = new Uint8Array(arrayBuffer); | ||
| var decoderWorker = new Worker('../dist-unminified/decoderWorker.js'); | ||
| var wavWorker = new Worker('../dist-unminified/waveWorker.js'); | ||
| var desiredSampleRate = parseInt(sampleRate.value,10); | ||
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| decoderWorker.postMessage({ | ||
| command:'init', | ||
| decoderSampleRate: desiredSampleRate, | ||
| outputBufferSampleRate: desiredSampleRate | ||
| }); | ||
|
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| wavWorker.postMessage({ | ||
| command:'init', | ||
| wavBitDepth: parseInt(bitDepth.value,10), | ||
| wavSampleRate: desiredSampleRate | ||
| }); | ||
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| var use16 = true; | ||
| var text = use16 ? 'INT16' : 'FLOAT32'; | ||
| var int16Array = []; | ||
| var float32Array = []; | ||
| decoderWorker.onmessage = function(e){ | ||
| var data = e.data; | ||
| // null means decoder is finished | ||
| if(!data || data.type == 'done') { | ||
| console.log('waveform:', data && data.waveform); | ||
| wavWorker.postMessage({ command: 'done' }); | ||
| } else { // e.data contains decoded buffers as float32 values | ||
| wavWorker.postMessage({ | ||
| command: 'encode', | ||
| buffers: e.data | ||
| }, e.data.map(function(typedArray){ | ||
| var int16 = typedArray instanceof Int16Array; | ||
| for(var i = 0; i < typedArray.length; ++i) { | ||
| var sample = typedArray[i]; | ||
| if(!int16) { | ||
| sample = Math.floor(sample * 32767.5 - 0.5); | ||
| float32Array.push(sample); | ||
| } else { | ||
| sample = Math.floor(sample - 0.5); | ||
| int16Array.push(sample); | ||
| } | ||
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| text += sample + ','; | ||
| } | ||
|
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| return typedArray.buffer; | ||
| })); | ||
| } | ||
| }; | ||
|
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| wavWorker.onmessage = function(e){ | ||
| var data = e.data; | ||
| // null signifies that no more data is expected and worker is closed. | ||
| if (data && data.page) { | ||
| var fileName = new Date().toISOString() + ".wav"; | ||
| var dataBlob = new Blob( [ data.page ], { type: "audio/wav" } ); | ||
| var url = URL.createObjectURL( dataBlob ); | ||
|
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| var audio = document.createElement('audio'); | ||
| audio.controls = true; | ||
| audio.src = URL.createObjectURL( dataBlob ); | ||
|
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| var blob = new Blob([text], {type: "text/plain;charset=utf-8"}); | ||
| url = URL.createObjectURL(blob); | ||
| fileName = new Date().toISOString() + ".txt"; | ||
|
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| var link = document.createElement('a'); | ||
| link.href = url; | ||
| link.download = fileName; | ||
| link.innerHTML = link.download; | ||
|
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| console.log(int16Array, float32Array); | ||
|
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| var li = document.createElement('li'); | ||
| li.appendChild(link); | ||
| li.appendChild(audio); | ||
|
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| recordingslist.appendChild(li); | ||
|
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| if(!float32Array.length) { | ||
| decoderWorker.postMessage({ | ||
| command:'init', | ||
| decoderSampleRate: desiredSampleRate, | ||
| outputBufferSampleRate: desiredSampleRate | ||
| }); | ||
|
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| wavWorker.postMessage({ | ||
| command:'init', | ||
| wavBitDepth: parseInt(bitDepth.value,10), | ||
| wavSampleRate: desiredSampleRate | ||
| }); | ||
|
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| setTimeout(() => { | ||
| console.log('pass typedArray', typedArray); | ||
| decoderWorker.postMessage({ | ||
| //command: 'decode', | ||
| //command: 'waveform', | ||
| //command: 'decode16', | ||
| command: 'decode', | ||
| pages: typedArray, | ||
| waveform: true | ||
| }, [typedArray.buffer] ); | ||
| }, 500); | ||
| } else { | ||
| var diff = []; | ||
| for(var i = 0; i < int16Array.length; ++i) { | ||
| var first = int16Array[i]; | ||
| var second = float32Array[i]; | ||
| if(Math.abs(second - first) == 1) continue; | ||
| else if(first != second) { | ||
| diff.push({index: i, values: [first, second]}); | ||
| } | ||
| } | ||
| console.log(diff); | ||
| } | ||
| } | ||
| }; | ||
|
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| decoderWorker.postMessage({ | ||
| command: 'decode', | ||
| //command: 'waveform', | ||
| //command: 'decode16', | ||
| //command: use16 ? 'decode16' : 'decode', | ||
| pages: typedArray, | ||
| waveform: true | ||
| }/* , [typedArray.buffer] */ ); | ||
| }; | ||
|
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| fileInput.onchange = function(e){ | ||
| var fileReader = new FileReader(); | ||
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| fileReader.onload = function() { | ||
| decodeOgg(this.result); | ||
| }; | ||
|
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| fileReader.readAsArrayBuffer( e.target.files[0] ); | ||
| }; | ||
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| remoteButton.onclick = function(){ | ||
| var xhr = new XMLHttpRequest(); | ||
| xhr.open("GET", "./mono.opus", true); | ||
| xhr.responseType = "arraybuffer"; | ||
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| xhr.onload = function(e) { | ||
| decodeOgg(this.response); | ||
| }; | ||
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| xhr.send(); | ||
| }; | ||
|
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| </script> | ||
| </body> | ||
| </html> |
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