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小編給大家分享一下html5怎么實現(xiàn)手機觸摸出現(xiàn)錄音以及離開停止錄音并上傳的功能，希望大家閱讀完這篇文章后大所收獲，下面讓我們一起去探討吧！
以下是實現(xiàn)功能實例：
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");//獲取ID
function initEvent() {
btnElem.addEventListener("touchstart", function(event) {
//event.preventDefault();//阻止瀏覽器默認行為
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("上傳成功");
break;
case 'error':
alert("上傳失敗");
break;
case 'cancel':
alert("上傳被取消");
break;
}
});
});
};
initEvent();
<script/>下面是js:
//兼容
window.URL = window.URL || window.webkitURL;
//獲取計算機的設備：攝像頭或者錄音設備
navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia;var HZRecorder = function (stream, config) {
config = config || {};
config.sampleBits = config.sampleBits || 8; //采樣數(shù)位 8, 16
config.sampleRate = config.sampleRate || (44100 / 6); //采樣率(1/6 44100)
//創(chuàng)建一個音頻環(huán)境對象
var audioContext = window.AudioContext || window.webkitAudioContext;
var context = new audioContext();
var audioInput = context.createMediaStreamSource(stream);
// 第二個和第三個參數(shù)指的是輸入和輸出都是單聲道,2是雙聲道。
var recorder = context.createScriptProcessor(4096, 1, 1);
var audioData = {
size: 0 //錄音文件長度
, buffer: [] //錄音緩存
, inputSampleRate: context.sampleRate //輸入采樣率
, inputSampleBits: 16 //輸入采樣數(shù)位 8, 16
, outputSampleRate: config.sampleRate //輸出采樣率
, outputSampleBits: config.sampleBits //輸出采樣數(shù)位 8, 16
, input: function (data) {
this.buffer.push(new Float32Array(data));
this.size += data.length;
}
, compress: function () { //合并壓縮
//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;
}
//壓縮
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;//單聲道
var offset = 0;
var writeString = function (str) {
for (var i = 0; i < str.length; i++) {
data.setUint8(offset + i, str.charCodeAt(i));
}
}
// 資源交換文件標識符
writeString('RIFF'); offset += 4;
// 下個地址開始到文件尾總字節(jié)數(shù),即文件大小-8
data.setUint32(offset, 36 + dataLength, true); offset += 4;
// WAV文件標志
writeString('WAVE'); offset += 4;
// 波形格式標志
writeString('fmt '); offset += 4;
// 過濾字節(jié),一般為 0x10 = 16
data.setUint32(offset, 16, true); offset += 4;
// 格式類別 (PCM形式采樣數(shù)據(jù))
data.setUint16(offset, 1, true); offset += 2;
// 通道數(shù)
data.setUint16(offset, channelCount, true); offset += 2;
// 采樣率,每秒樣本數(shù),表示每個通道的播放速度
data.setUint32(offset, sampleRate, true); offset += 4;
// 波形數(shù)據(jù)傳輸率 (每秒平均字節(jié)數(shù)) 單聲道×每秒數(shù)據(jù)位數(shù)×每樣本數(shù)據(jù)位/8
data.setUint32(offset, channelCount * sampleRate * (sampleBits / 8), true); offset += 4;
// 快數(shù)據(jù)調整數(shù) 采樣一次占用字節(jié)數(shù) 單聲道×每樣本的數(shù)據(jù)位數(shù)/8
data.setUint16(offset, channelCount * (sampleBits / 8), true); offset += 2;
// 每樣本數(shù)據(jù)位數(shù)
data.setUint16(offset, sampleBits, true); offset += 2;
// 數(shù)據(jù)標識符
writeString('data'); offset += 4;
// 采樣數(shù)據(jù)總數(shù),即數(shù)據(jù)總大小-44
data.setUint32(offset, dataLength, true); offset += 4;
// 寫入采樣數(shù)據(jù)
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/mp3' });
}
};
//開始錄音
this.start = function () {
audioInput.connect(recorder);
recorder.connect(context.destination);
}
//停止
this.stop = function () {
recorder.disconnect();
}
//獲取音頻文件
this.getBlob = function () {
this.stop();
return audioData.encodeWAV();
}
//上傳
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);
} //音頻采集
recorder.onaudioprocess = function (e) {
audioData.input(e.inputBuffer.getChannelData(0));
//record(e.inputBuffer.getChannelData(0));
}
};//拋出異常// HZRecorder.throwError = function (message) {
// alert(message);
// throw new function () { this.toString = function () { return message; } }
// }
//是否支持錄音HZRecorder.canRecording = (navigator.getUserMedia != null);
//獲取錄音機
HZRecorder.get = function (callback, config) {
if (callback) {
if (navigator.getUserMedia) {
navigator.getUserMedia(
{ audio: true } //只啟用音頻
, function (stream) {
var rec = new HZRecorder(stream, config);
callback(rec);
}
, function (error) {
switch (error.code || error.name) {
case 'PERMISSION_DENIED':
case 'PermissionDeniedError':
HZRecorder.throwError('用戶拒絕提供信息。');
break;
case 'NOT_SUPPORTED_ERROR':
case 'NotSupportedError':
HZRecorder.throwError('瀏覽器不支持硬件設備。');
break;
case 'MANDATORY_UNSATISFIED_ERROR':
case 'MandatoryUnsatisfiedError':
HZRecorder.throwError('無法發(fā)現(xiàn)指定的硬件設備。');
break; default:
HZRecorder.throwError('無法打開麥克風。異常信息:' + (error.code || error.name));
break;
}
});
} else {
HZRecorder.throwErr('當前瀏覽器不支持錄音功能。');
return;
}
}
};看完了這篇文章，相信你對html5怎么實現(xiàn)手機觸摸出現(xiàn)錄音以及離開停止錄音并上傳的功能有了一定的了解，想了解更多相關知識，歡迎關注億速云行業(yè)資訊頻道，感謝各位的閱讀！
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