HTML5声音录制/播放功能的实现代码

htML代码：

!DOCTYPE html>
    html>
        head>
            meta http-equiv="Content-type" content="text/html;
     charset=utf-8" />
            tITle>
    火星黑洞/title>
        /head>
        body>
            div>
                audio autoplay>
    /audio>
                input onclick="startRecording()" type="button" value="录音" />
                input onclick="stoPRecording()" type="button" value="停止" />
                input onclick="playRecording()" type="button" value="播放" />
                input onclick="uploadAudio()" type="button" value="提交" />
                br />
                div id="recordingslist">
    /div>
            /div>
            script type="text/javascript" src="js/HZRecorder.js">
    /script>
            script>
                VAR recorder;
                var audio = document.querySelector('audio');
            function startRecording() {
                HZRecorder.get(function(rec) {
                        recorder = rec;
                        recorder.start();
                }
, {
                    sampleBits: 16,                    sampleRate: 16000                }
    );
            }
            function stopRecording() {
                    recorder.stop();
                    var blob = recorder.getBlob();
                    var url = URL.createObjectURL(blob);
                    var div = document.createElement('div');
                    var au = document.createElement('audio');
                    var hf = document.createElement('a');
                    au.controls = true;
                    au.src = url;
                    hf.href = url;
                    hf.download = new Date().toISOString() + '.wav';
                    hf.innerHTML = hf.download;
                    div.appendChild(au);
                    div.appendChild(hf);
                    recordingslist.appendChild(div);
            }
            function playRecording() {
                    recorder.play(audio);
            }
            function uploadAudio() {
                recorder.upload("Handler1.ashx", 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;
                    }
                }
    );
            }
            /script>
        /body>
    /html>
    

HZRecorder.js

(function (window) {
        //兼容    window.URL = window.URL || window.webkitURL;
        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)        var context = new (window.webkitAudioContext || window.AudioContext)();
            var audioInput = context.createMediaStreamSource(stream);
            var createScript = context.createScriptProcessor || context.createJavaScriptNode;
            var recorder = createScript.apply(context, [4096, 1, 1]);
            var mP3ReceiveSuccess, currentErrorCallback;
        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            , oututSampleBits: 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.oututSampleBits);
                    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);
                    }
                }
                return new Blob([data], {
 type: 'audio/wav' }
    );
            }
        }
    ;
        //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();
        }
        //回放        this.play = function (audio) {
                audio.src = window.URL.createObjectURL(this.getBlob());
        }
        //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('uploading', e);
                }
    , false);
                xhr.addEventListener("load", function (e) {
                        callback('ok', e);
                }
    , false);
                xhr.addEventListener("error", function (e) {
                        callback('error', e);
                }
    , false);
                xhr.addEventListener("abort", function (e) {
                        callback('cancel', 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 'PERMISSION_DENIED':                            case 'PermissionDeniedError':                                HZRecorder.throwError('用户拒绝提供信息。');
                                    break;
                                case 'NOT_SUPPORTED_ERROR':                            case 'NotSupportedError':                                HZRecorder.throwError('浏览器不支持硬件设备。');
                                    break;
                                case 'MANDATORY_UNSATISFIED_ERROR':                            case 'MandatoryUnsatisfiedError':                                HZRecorder.throwError('无法发现指定的硬件设备。');
                                    break;
                                default:                                HZRecorder.throwError('无法打开麦克风。异常信息:' + (error.code || error.name));
                                    break;
                        }
                    }
    );
            }
 else {
                    HZRecorder.throwErr('当前浏览器不支持录音功能。');
     return;
            }
        }
    }
        window.HZRecorder = HZRecorder;
}
    )(window);
    

总结@H_304_15@

以上所述是小编给大家介绍的HTML5声音录制/播放功能的实现代码，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对网站的支持！

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