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Golang 基于chrome浏览器语音识别web演示系统WebHTK开发之 UI篇 推荐

2014-03-04 22:51 549 查看
没啥好说的，直接上现阶段的HTML代码，后续修改，再更新该篇博客。
record.html：
<!DOCTYPE html>

<html>
<head>
<meta charset="utf-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=edge"/>
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no"/>
<meta name="keywords" content="PONPON,HTK,Go语言"/>
<meta name="description" content="基于Beego开发语音识别演示系统"/>
<meta name="generator" content="PONPON" />

<link href="/static/css/bootstrap.min.css" rel="stylesheet">
<link href="/static/css/docs.css" rel="stylesheet">
<link href="http://cdn.bootcss.com/highlight.js/7.3/styles/github.min.css" rel="stylesheet">
<link rel="shortcut icon" href="/static/img/Logoicon.jpg">

<link rel="stylesheet" href="http://libs.baidu.com/fontawesome/4.0.3/css/font-awesome.min.css"/>
<link rel="alternate" type="application/rss+xml" href="/rss.xml"/>

<script type="text/javascript" src="/static/lib/recorder.js"> </script>
<script type="text/javascript" src="/static/lib/jquery-1.10.1.min.js"> </script>
<script type="text/javascript" src="/static/lib/recController.js"> </script>

<title>WebHTK 演示系统</title>
</head>
<body>
<nav id="header">
<div class="container960 text-center" >
<h3 id="header-h" class="center" >闽南语 - 语音识别演示系统</h3>

<ul id="resultbox" class="center" style="padding-top:425px;font-size:20px;text-align: center;color:#FFC8B6;font-family:'微软雅黑'">
<li >识别结果</li>
</ul>

<form style="padding-top:20px;">
<a id="img" href="javascript://"  >
<img  src="/static/img/aa.png" style="width:85px;height:85px;" alt=""/>
</a>
</form>
<div id="message" style="padding-top:10px;font-size:16px;color:#F5FFFA;text-align: center;font-family:'微软雅黑'">点击麦克风，开始录音!</div>

<script type="text/javascript">

var recording = false;

function test() {
if (!recording) {
document.getElementById("img").innerHTML="<img  src='/static/img/a1.png' style='width:85px;height:85px;'' alt=''/>";
toRecord();
recording=true;
}else{
document.getElementById("img").innerHTML="<img  src='/static/img/aa.png' style='width:85px;height:85px;'' alt=''/>";
toSend();
recording = false;
}
};

function toRecord(){
rec.record();
var dd = ws.send("start");
$("#message").text("再次点击，结束录音！");
intervalKey = setInterval(function() {
rec.exportWAV(function(blob) {
rec.clear();
ws.send(blob);

});
}, 300);
}

function toSend(){
rec.stop();
if (intervalKey == null) {
$("#message").text("请先录音再发送！");
return
};
ws.send(sampleRate);
ws.send(channels);
ws.send("stop");
rec.clear();
clearInterval(intervalKey);
intervalKey = null;

}

</script>
</div>
</nav>

<audio class="hide" controls autoplay></audio>
</body>
</html>


recorder.js：

(function(window) {

var WORKER_PATH = '/static/lib/recorderWorker.js';

var Recorder = function(source, chan, cfg) {
var config = cfg || {};
var channels = chan || 1;
var bufferLen = config.bufferLen || 8192;
this.context = source.context;

this.node = this.context.createJavaScriptNode(bufferLen, channels, channels);
var worker = new Worker(config.workerPath || WORKER_PATH);
worker.postMessage({
command: 'init',
config: {
sampleRate: this.context.sampleRate
}
});
var recording = false,
currCallback;

this.node.onaudioprocess = function(e) {
if (!recording) return;
worker.postMessage({
command: 'record',
buffer: [
e.inputBuffer.getChannelData(0)
]
});
}

this.configure = function(cfg) {
for (var prop in cfg) {
if (cfg.hasOwnProperty(prop)) {
config[prop] = cfg[prop];
}
}
}

this.record = function() {
recording = true;
}

this.stop = function() {
recording = false;
}

this.clear = function() {
worker.postMessage({
command: 'clear'
});
}

this.getBuffer = function(cb) {
currCallback = cb || config.callback;
worker.postMessage({
command: 'getBuffer'
})
}

this.exportWAV = function(cb, type) {
currCallback = cb || config.callback;
type = type || config.type || 'audio/wav';
if (!currCallback) throw new Error('Callback not set');
worker.postMessage({
command: 'exportWAV',
type: type
});
}

worker.onmessage = function(e) {
var blob = e.data;
currCallback(blob);
}

source.connect(this.node);
this.node.connect(this.context.destination);
};

window.Recorder = Recorder;

})(window);


recorderWorker.js：

var recLength = 0,
recBuffersL = [],
sampleRate;

this.onmessage = function(e) {
switch (e.data.command) {
case 'init':
init(e.data.config);
break;
case 'record':
record(e.data.buffer);
break;
case 'exportWAV':
exportWAV(e.data.type);
break;
case 'getBuffer':
getBuffer();
break;
case 'clear':
clear();
break;
}
};

function init(config) {
sampleRate = config.sampleRate;
}

function record(inputBuffer) {
recBuffersL.push(inputBuffer[0]);
recLength += inputBuffer[0].length;
}

function exportWAV(type) {
var bufferL = mergeBuffers(recBuffersL, recLength);
var interleaved = interleave(bufferL);
var dataview = encodeWAV(interleaved);
var audioBlob = new Blob([dataview], {
type: type
});

this.postMessage(audioBlob);
}

function getBuffer() {
var buffers = [];
buffers.push(mergeBuffers(recBuffersL, recLength));
this.postMessage(buffers);
}

function clear(inputBuffer) {
recLength = 0;
recBuffersL = [];
}

function mergeBuffers(recBuffers, recLength) {
var result = new Float32Array(recLength);
var offset = 0;
for (var i = 0; i < recBuffers.length; i++) {
result.set(recBuffers[i], offset);
offset += recBuffers[i].length;
}
return result;
}

function interleave(inputL) {
var length;
var result;

var index = 0,
inputIndex = 0;

if (sampleRate == 48000) {
length = inputL.length / 6;
result = new Float32Array(length);
while (index < length) {

result[index++] = (inputL[inputIndex++] + inputL[inputIndex++] +
inputL[inputIndex++] + inputL[inputIndex++] +
inputL[inputIndex++] + inputL[inputIndex++]) / 6;
}
} else if (sampleRate == 44100) {
length = inputL.length / 6;
result = new Float32Array(length);
while (index < length) {

if (inputIndex % 12 == 0) {
result[index++] = (inputL[inputIndex] + inputL[inputIndex++] +
inputL[inputIndex++] + inputL[inputIndex++] +
inputL[inputIndex++] + inputL[inputIndex++] +
inputL[inputIndex++]) / 7;
} else {
result[index++] = (inputL[inputIndex++] + inputL[inputIndex++] +
inputL[inputIndex++] + inputL[inputIndex++] +
inputL[inputIndex++] + inputL[inputIndex++]) / 6;
};
}
} else {
length = inputL.length;
result = new Float32Array(length);
while (index < length) {
result[index++] = inputL[inputIndex++];
}
};

return result;
}

function floatTo16BitPCM(output, offset, input) {
for (var i = 0; i < input.length; i++, offset += 2) {
var s = Math.max(-1, Math.min(1, input[i]));
output.setInt16(offset, s < 0 ? s * 0x8000 : s * 0x7FFF, true);
}
}

function writeString(view, offset, string) {
for (var i = 0; i < string.length; i++) {
view.setUint8(offset + i, string.charCodeAt(i));
}
}

function encodeWAV(samples) {
var buffer = new ArrayBuffer(samples.length * 2);
var view = new DataView(buffer);
floatTo16BitPCM(view, 0, samples);

return view;
}


recController.js：

var onFail = function(e) {
console.log('Rejected!', e);
};

var onSuccess = function(s) {
var context = new webkitAudioContext();
var mediaStreamSource = context.createMediaStreamSource(s);
rec = new Recorder(mediaStreamSource, channels);
sampleRate = 8000;
}

navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia;

var rec;
var intervalKey = null;
var audio = document.querySelector('#audio');
var sampleRate;
var channels = 1;

function startRecording() {
if (navigator.getUserMedia) {
navigator.getUserMedia({
audio: true
}, onSuccess, onFail);
} else {
console.log('navigator.getUserMedia not present');
}
}
startRecording();
//--------------------

var ws = new WebSocket('ws://' + window.location.host + '/join');
ws.onopen = function() {
console.log("Openened connection to websocket");
};

ws.onclose = function() {
console.log("Close connection to websocket");
}
ws.onerror = function() {
console.log("Cannot connection to websocket");
}

ws.onmessage = function(result) {
var data = JSON.parse(result.data);
console.log('识别结果：' + data.Pinyin);
var result = document.getElementById("resultbox")
result.getElementsByTagName("li")[0].innerHTML = data.Hanzi;
document.getElementById("message").innerHTML = "点击麦克风，开始录音!";
}


进入页面：




正在录音：




识别结果，目前还为将拼音转换为汉字，下图为“点亮星光”的显示结果图：
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