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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)

不言
不言asal
2018-08-20 17:56:089608semak imbas

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(&#39;microphone&#39;);        
    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 &#39;uploading&#39;:                            
                    //var percentComplete = Math.round(e.loaded * 100 / e.total) + &#39;%&#39;;
                            break;                        
                            case &#39;ok&#39;:                            
                            //alert(e.target.responseText);
                            alert("上传成功");                            
                            break;                        
                            case &#39;error&#39;:
                            alert("上传失败");                            
                            break;                        
                            case &#39;cancel&#39;:
                            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(&#39;RIFF&#39;); 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(&#39;WAVE&#39;); offset += 4;            
            // 波形格式标志
            writeString(&#39;fmt &#39;); 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(&#39;data&#39;); 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);
                }
            }            return new Blob([data], { type: &#39;audio/mp3&#39; });
        }
    };    
    //开始录音
    this.start = function () {
        audioInput.connect(recorder);
        recorder.connect(context.destination);
    }    
    //停止
    this.stop = function () {
        recorder.disconnect();
    }    
    //获取音频文件
    this.getBlob = function () {
        this.stop();        
        return audioData.encodeWAV();
    }    
    //上传
    this.upload = function (url, callback) {
        var fd = new FormData();
        fd.append("audioData", this.getBlob());        
        var xhr = new XMLHttpRequest();        
        if (callback) {
            xhr.upload.addEventListener("progress", function (e) {
                callback(&#39;uploading&#39;, e);
            }, false);
            xhr.addEventListener("load", function (e) {
                callback(&#39;ok&#39;, e);
            }, false);
            xhr.addEventListener("error", function (e) {
                callback(&#39;error&#39;, e);
            }, false);
            xhr.addEventListener("abort", function (e) {
                callback(&#39;cancel&#39;, e);
            }, false);
        }
        xhr.open("POST", url);
        xhr.send(fd);
    }    //音频采集
    recorder.onaudioprocess = function (e) {
        audioData.input(e.inputBuffer.getChannelData(0));        
        //record(e.inputBuffer.getChannelData(0));
    }

};//抛出异常// HZRecorder.throwError = function (message) {
//     alert(message);
//     throw new function () { this.toString = function () { return message; } }
// }
//是否支持录音HZRecorder.canRecording = (navigator.getUserMedia != null);
//获取录音机
HZRecorder.get = function (callback, config) {
    if (callback) {        
    if (navigator.getUserMedia) {
            navigator.getUserMedia(
                { audio: true } //只启用音频
                , function (stream) {
                    var rec = new HZRecorder(stream, config);
                    callback(rec);
                }
                , function (error) {
                    switch (error.code || error.name) {                        
                    case &#39;PERMISSION_DENIED&#39;:                        
                    case &#39;PermissionDeniedError&#39;:
                            HZRecorder.throwError(&#39;用户拒绝提供信息。&#39;);                            
                            break;                        
                            case &#39;NOT_SUPPORTED_ERROR&#39;:                        
                            case &#39;NotSupportedError&#39;:
                            HZRecorder.throwError(&#39;浏览器不支持硬件设备。&#39;);                            
                            break;                        
                            case &#39;MANDATORY_UNSATISFIED_ERROR&#39;:                        
                            case &#39;MandatoryUnsatisfiedError&#39;:
                            HZRecorder.throwError(&#39;无法发现指定的硬件设备。&#39;);                            
                            break;                        default:
                            HZRecorder.throwError(&#39;无法打开麦克风。异常信息:&#39; + (error.code || error.name));                            
                            break;
                    }
                });
        } else {
            HZRecorder.throwErr(&#39;当前浏览器不支持录音功能。&#39;); 
            return;
        }
    }
};

这些都是通过大神的讲解进行整合后自己摸索出来的,有什么问题可以评论,我们一起解决,谢谢!!!

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