本文主要包含HTML,录音等相关知识,匿名希望在学习及工作中可以帮助到您
本篇文章给大家带来的内容是关于html5实现手机触摸出现录音以及离开停止录音并上传的功能（代码），有一定的参考价值，有需要的朋友可以参考一下，希望对你有所帮助。
以下是实现功能实例：
html
<!DOCTYPE html><html><head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
<script type="text/javascript" scr="record.js"></script></head><body>
<p>
<input id="microphone" type="button" />
</p>
<script>
<script type="text/javascript">
var microDome=document.getElementById('microphone');
var recorder;
var btnElem=document.getElementById("microphone");//获取ID
function initEvent() {
btnElem.addEventListener("touchstart", function(event) {
//event.preventDefault();//阻止浏览器默认行为
HZRecorder.get(function (rec) {
recorder = rec;
recorder.start();
});
});
btnElem.addEventListener("touchend", function(event) {
//event.preventDefault();
HZRecorder.get(function (rec) {
recorder = rec;
recorder.stop();
})
recorder.upload("/upload", function (state, e) {
switch (state) {
case 'uploading':
//var percentComplete = Math.round(e.loaded * 100 / e.total) + '%';
break;
case 'ok':
//alert(e.target.responseText);
alert("上传成功");
break;
case 'error':
alert("上传失败");
break;
case 'cancel':
alert("上传被取消");
break;
}
});
});
};
initEvent();
<script/>下面是js:
//兼容
window.URL = window.URL || window.webkitURL;
//获取计算机的设备：摄像头或者录音设备
navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia;var HZRecorder = function (stream, config) {
config = config || {};
config.sampleBits = config.sampleBits || 8; //采样数位 8, 16
config.sampleRate = config.sampleRate || (44100 / 6); //采样率(1/6 44100)
//创建一个音频环境对象
var audioContext = window.AudioContext || window.webkitAudioContext;
var context = new audioContext();
var audioInput = context.createMediaStreamSource(stream);
// 第二个和第三个参数指的是输入和输出都是单声道,2是双声道。
var recorder = context.createScriptProcessor(4096, 1, 1);
var audioData = {
size: 0 //录音文件长度
, buffer: [] //录音缓存
, inputSampleRate: context.sampleRate //输入采样率
, inputSampleBits: 16 //输入采样数位 8, 16
, outputSampleRate: config.sampleRate //输出采样率
, outputSampleBits: config.sampleBits //输出采样数位 8, 16
, input: function (data) {
this.buffer.push(new Float32Array(data));
this.size += data.length;
}
, compress: function () { //合并压缩
//合并
var data = new Float32Array(this.size);
var offset = 0;
for (var i = 0; i < this.buffer.length; i++) {
data.set(this.buffer[i], offset);
offset += this.buffer[i].length;
}
//压缩
var compression = parseInt(this.inputSampleRate / this.outputSampleRate);
var length = data.length / compression;
var result = new Float32Array(length);
var index = 0, j = 0;
while (index < length) {
result[index] = data[j];
j += compression;
index++;
}
return result;
}
, encodeWAV: function () {
var sampleRate = Math.min(this.inputSampleRate, this.outputSampleRate);
、var sampleBits = Math.min(this.inputSampleBits, this.outputSampleBits);
var bytes = this.compress();
var dataLength = bytes.length * (sampleBits / 8);
var buffer = new ArrayBuffer(44 + dataLength);
var data = new DataView(buffer);
var channelCount = 1;//单声道
var offset = 0;
var writeString = function (str) {
for (var i = 0; i < str.length; i++) {
data.setUint8(offset + i, str.charCodeAt(i));
}
}
// 资源交换文件标识符
writeString('RIFF'); offset += 4;
// 下个地址开始到文件尾总字节数,即文件大小-8
data.setUint32(offset, 36 + dataLength, true); offset += 4;
// WAV文件标志
writeString('WAVE'); offset += 4;
// 波形格式标志
writeString('fmt '); offset += 4;
// 过滤字节,一般为 0x10 = 16
data.setUint32(offset, 16, true); offset += 4;
// 格式类别 (PCM形式采样数据)
data.setUint16(offset, 1, true); offset += 2;
// 通道数
data.setUint16(offset, channelCount, true); offset += 2;
// 采样率,每秒样本数,表示每个通道的播放速度
data.setUint32(offset, sampleRate, true); offset += 4;
// 波形数据传输率 (每秒平均字节数) 单声道×每秒数据位数×每样本数据位/8
data.setUint32(offset, channelCount * sampleRate * (sampleBits / 8), true); offset += 4;
// 快数据调整数 采样一次占用字节数 单声道×每样本的数据位数/8
data.setUint16(offset, channelCount * (sampleBits / 8), true); offset += 2;
// 每样本数据位数
data.setUint16(offset, sampleBits, true); offset += 2;
// 数据标识符
writeString('data'); offset += 4;
// 采样数据总数,即数据总大小-44
data.setUint32(offset, dataLength, true); offset += 4;
// 写入采样数据
if (sampleBits === 8) {
for (var i = 0; i < bytes.length; i++, offset++) {
var s = Math.max(-1, Math.min(1, bytes[i]));
var val = s < 0 ? s * 0x8000 : s * 0x7FFF;
val = parseInt(255 / (65535 / (val + 32768)));
data.setInt8(offset, val, true);
}
} else {
for (var i = 0; i < bytes.length; i++, offset += 2) {
var s = Math.max(-1, Math.min(1, bytes[i]));
data.setInt16(offset, s < 0 ? s * 0x8000 : s * 0x7FFF, true);
}
}