HTML5 realizes the function of recording when the mobile phone is touched and leaving to stop recording and upload (code)-H5 Tutorial-php.cn

HTML5 realizes the function of recording when the mobile phone is touched and leaving to stop recording and upload (code)

不言

Aug 20, 2018 pm 05:56 PM

htmlrecording

The content of this article is about the HTML5 function (code) of realizing recording when touching a mobile phone and leaving to stop recording and upload. It has certain reference value. Friends in need can refer to it. I hope it will be useful to you. helped.

The following are examples of functional implementation:
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/>

The following is 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;
        }
    }
};

These are all figured out by myself after integrating through the explanations of the masters. Yes, if you have any questions, please comment and we will solve it together, thank you! ! !

Related recommendations:

How to use the html5 audio tag? HTML5 autoplay implementation code example

#How does the html5 mobile page adapt to the screen? Four ways to adapt html5 pages to mobile phone screens

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