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broadcast.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8"/>
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0"/>
<meta name="apple-mobile-web-capable" content="yes"/>
<title>语音广播</title>
</head>
<body>
<button id="intercomBegin">开始广播</button>
<button id="intercomEnd">关闭广播</button>
<input style="width: 100px;" id="device_id" type="text" value="34020000001320000001"/>
<input style="width: 100px;" id="channel_id" type="text" value="34020000001320000001"/>
<button id="invite" onclick="invite()">邀请</button>
<button id="hangup" onclick="hangup()">挂断</button>
</body>
<script src="g711.js"></script>
<script type="text/javascript">
var begin = document.getElementById('intercomBegin');
var end = document.getElementById('intercomEnd');
var ws = null; //实现WebSocket
var record = null; //多媒体对象，用来处理音频
var roomId = null;
function init(rec) {
record = rec;
}
function invite() {
let deviceId = document.getElementById("device_id").value;
let channelId = document.getElementById("channel_id").value;
let data = {
device_id: deviceId,
channel_id: channelId,
type: 1,
room_id: roomId
};
fetch("/api/v1/broadcast/invite", {
method: 'POST',
body: JSON.stringify(data),
headers: new Headers({
'Content-Type': 'application/json',
}),
}).then((res) => res.json())
.then((data) => {
})
}
function hangup() {
let deviceId = document.getElementById("device_id").value;
let channelId = document.getElementById("channel_id").value;
let data = {
device_id: deviceId,
channel_id: channelId,
room_id: roomId
};
fetch("/api/v1/broadcast/hangup", {
method: 'POST',
body: JSON.stringify(data),
headers: new Headers({
'Content-Type': 'application/json',
}),
}).then((res) => res.json())
.then((data) => {
})
}
//录音对象
var Recorder = function (stream) {
var sampleBits = 16; //输出采样数位 8, 16
var sampleRate = 8000; //输出采样率
var context = new AudioContext();
var audioInput = context.createMediaStreamSource(stream);
var recorder = context.createScriptProcessor(4096, 1, 1);
var audioData = {
size: 0, //录音文件长度
buffer: [], //录音缓存
inputSampleRate: 48000, //输入采样率
inputSampleBits: 16, //输入采样数位 8, 16
outputSampleRate: sampleRate, //输出采样数位
oututSampleBits: sampleBits, //输出采样率
clear: function () {
this.buffer = [];
this.size = 0;
},
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;
},
encodePCM: function () { //这里不对采集到的数据进行其他格式处理，如有需要均交给服务器端处理。
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(dataLength);
var data = new DataView(buffer);
var offset = 0;
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]);
}
};
var sendData = function () { //对以获取的数据进行处理(分包)
var reader = new FileReader();
reader.onload = e => {
var outbuffer = e.target.result;
var arr = new Uint16Array(outbuffer);
var dst = new Int8Array(arr.length);
pcm16_to_alaw(arr.byteLength, arr, dst);
ws.send(dst);
};
reader.readAsArrayBuffer(audioData.encodePCM());
audioData.clear();//每次发送完成则清理掉旧数据
};
this.start = function () {
audioInput.connect(recorder);
recorder.connect(context.destination);
}
this.stop = function () {
recorder.disconnect();
}
this.getBlob = function () {
return audioData.encodePCM();
}
this.clear = function () {
audioData.clear();
}
recorder.onaudioprocess = function (e) {
var inputBuffer = e.inputBuffer.getChannelData(0);
audioData.input(inputBuffer);
sendData();
}
}
//录音对象
/* var Recorder = function(stream) {
var sampleBits = 16; //输出采样数位 8, 16
var sampleRate = 8000; //输出采样率
var context = new AudioContext();
var audioInput = context.createMediaStreamSource(stream);
var recorder = context.createScriptProcessor(4096, 1, 1);
var audioData = {
size: 0, //录音文件长度
buffer: [], //录音缓存
inputSampleRate: 48000, //输入采样率
inputSampleBits: 16, //输入采样数位 8, 16
outputSampleRate: sampleRate, //输出采样数位
oututSampleBits: sampleBits, //输出采样率
clear: function() {
this.buffer = [];
this.size = 0;
},
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;
},
encodePCM: function() { //这里不对采集到的数据进行其他格式处理，如有需要均交给服务器端处理。
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(dataLength);
var data = new DataView(buffer);
var offset = 0;
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]);
}
};
var sendData = function() { //对以获取的数据进行处理(分包)
var reader = new FileReader();
reader.onload = e => {
var outbuffer = e.target.result;
var arr = new Int8Array(outbuffer);
if (arr.length > 0) {
var tmparr = new Int8Array(1024);
var j = 0;
for (var i = 0; i < arr.byteLength; i++) {
tmparr[j++] = arr[i];
if (((i + 1) % 1024) == 0) {
ws.send(tmparr);
if (arr.byteLength - i - 1 >= 1024) {
tmparr = new Int8Array(1024);
} else {
tmparr = new Int8Array(arr.byteLength - i - 1);
}
j = 0;
}
if ((i + 1 == arr.byteLength) && ((i + 1) % 1024) != 0) {
ws.send(tmparr);
}
}
}
};
reader.readAsArrayBuffer(audioData.encodePCM());
audioData.clear();//每次发送完成则清理掉旧数据
};
this.start = function() {
audioInput.connect(recorder);
recorder.connect(context.destination);
}
this.stop = function() {
recorder.disconnect();
}
this.getBlob = function() {
return audioData.encodePCM();
}
this.clear = function() {
audioData.clear();
}
recorder.onaudioprocess = function(e) {
var inputBuffer = e.inputBuffer.getChannelData(0);
audioData.input(inputBuffer);
sendData();
}
}*/
/*
* WebSocket
*/
function connectWS() {
let secure = window.location.protocol === 'https:'
let url = (secure ? "wss:" : "ws:") + "/" + window.location.host + "/ws/v1/talk"
ws = new WebSocket(url);
ws.binaryType = 'arraybuffer'; //传输的是 ArrayBuffer 类型的数据
ws.onopen = function () {
console.log('握手成功');
record.start();
};
ws.onmessage = function (msg) {
const response = JSON.parse(msg.data);
roomId = response["data"]["room_id"];
console.info("room_id:" + roomId)
}
ws.onerror = function (err) {
console.info(err)
record.stop()
}
}
/*
* 开始对讲
*/
begin.onclick = function () {
navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia;
if (!navigator.getUserMedia) {
alert('浏览器不支持音频输入');
} else {
navigator.getUserMedia({
audio: true
},
//获取到音频采集权限回调
function (mediaStream) {
console.log('开始对讲');
//初始化采集器
init(new Recorder(mediaStream));
//连接websocket
connectWS();
},
function (error) {
console.log(error);
switch (error.message || error.name) {
case 'PERMISSION_DENIED':
case 'PermissionDeniedError':
console.info('用户拒绝提供信息。');
break;
case 'NOT_SUPPORTED_ERROR':
case 'NotSupportedError':
console.info('浏览器不支持硬件设备。');
break;
case 'MANDATORY_UNSATISFIED_ERROR':
case 'MandatoryUnsatisfiedError':
console.info('无法发现指定的硬件设备。');
break;
default:
console.info('无法打开麦克风。异常信息:' + (error.code || error.name));
break;
}
}
)
}
}
/*
* 关闭对讲
*/
end.onclick = function () {
if (ws) {
ws.close();
record.stop();
console.log('关闭对讲以及WebSocket');
}
}
</script>
</html>