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HTML5声音录制/播放功能的实现代码

程序员文章站 2023-11-12 09:49:16
本文通过实例代码给大家介绍了HTML5声音录制/播放功能,非常不错,具有参考借鉴价值,需要的朋友跟随脚本之家小编一起学习吧... 18-05-03...

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

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