<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta
name="viewport"
content="width=device-width,height=device-height, initial-scale=1.0, maximum-scale=1.0, user-scalable=0"
/>
<title>HTML5采集录音与发送语音功能</title>
</head>
<body>
<div>
<audio controls 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" />
</div>
<script>
window.URL = window.URL || window.webkitURL;
navigator.getUserMedia =
navigator.getUserMedia ||
navigator.webkitGetUserMedia ||
navigator.mozGetUserMedia ||
navigator.msGetUserMedia;
var AsaiRecorder = function (stream, config) {
config = config || {};
config.sampleBits = config.sampleBits || 16;
config.sampleRate = config.sampleRate || 16000;
var context = new AudioContext();
var audioInput = context.createMediaStreamSource(stream);
var recorder = context.createScriptProcessor(4096, 1, 1);
var audioData = {
size: 0,
buffer: [],
inputSampleRate: context.sampleRate,
inputSampleBits: 16,
outputSampleRate: config.sampleRate,
oututSampleBits: config.sampleBits,
input: function (data) {
this.buffer.push(new Float32Array(data));
this.size += data.length;
},
compress: function () {
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;
}
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;
var offset = 0;
var writeString = function (str) {
for (var i = 0; i < str.length; i++) {
data.setUint8(offset + i, str.charCodeAt(i));
}
};
writeString("RIFF");
offset += 4;
data.setUint32(offset, 36 + dataLength, true);
offset += 4;
writeString("WAVE");
offset += 4;
writeString("fmt ");
offset += 4;
data.setUint32(offset, 16, true);
offset += 4;
data.setUint16(offset, 1, true);
offset += 2;
data.setUint16(offset, channelCount, true);
offset += 2;
data.setUint32(offset, sampleRate, true);
offset += 4;
data.setUint32(
offset,
channelCount * sampleRate * (sampleBits / 8),
true
);
offset += 4;
data.setUint16(offset, channelCount * (sampleBits / 8), true);
offset += 2;
data.setUint16(offset, sampleBits, true);
offset += 2;
writeString("data");
offset += 4;
data.setUint32(offset, dataLength, true);
offset += 4;
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" });
},
};
this.start = function () {
audioInput.connect(recorder);
recorder.connect(context.destination);
};
this.stop = function () {
recorder.disconnect();
};
this.getBlob = function () {
this.stop();
return audioData.encodeWAV();
};
this.play = function (audio) {
audio.src = window.URL.createObjectURL(this.getBlob());
console.log(666.1002, audio.src);
};
this.upload = function (url, callback) {
var fd = new FormData();
fd.append("audioData", this.getBlob());
console.log(666.1001, 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);
};
recorder.onaudioprocess = function (e) {
audioData.input(e.inputBuffer.getChannelData(0));
};
};
AsaiRecorder.throwError = function (message) {
alert(message);
throw new (function () {
this.toString = function () {
return message;
};
})();
};
AsaiRecorder.canRecording = navigator.getUserMedia != null;
AsaiRecorder.get = function (callback, config) {
if (callback) {
if (navigator.getUserMedia) {
navigator.getUserMedia(
{ audio: true },
function (stream) {
var rec = new AsaiRecorder(stream, config);
callback(rec);
},
function (error) {
console.log(error);
switch (error.code || error.name) {
case "PERMISSION_DENIED":
case "PermissionDeniedError":
AsaiRecorder.throwError("用户拒绝提供信息。");
break;
case "NOT_SUPPORTED_ERROR":
case "NotSupportedError":
AsaiRecorder.throwError("浏览器不支持硬件设备。");
break;
case "MANDATORY_UNSATISFIED_ERROR":
case "MandatoryUnsatisfiedError":
AsaiRecorder.throwError("无法发现指定的硬件设备。");
break;
default:
AsaiRecorder.throwError(
"无法打开麦克风。异常信息:" + (error.code || error.name)
);
break;
}
}
);
} else {
AsaiRecorder.throwErr("当前浏览器不支持录音功能。");
return;
}
}
};
window.AsaiRecorder = AsaiRecorder;
var recorder;
var audio = document.querySelector("audio");
function startRecording() {
AsaiRecorder.get(function (rec) {
recorder = rec;
recorder.start();
});
}
function stopRecording() {
recorder.stop();
}
function playRecording() {
recorder.play(audio);
}
function uploadAudio() {
recorder.upload(
"http://localhost:9098/****/UploadVideoServlet",
function (state, e) {
switch (state) {
case "uploading":
break;
case "ok":
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>
