56 lines
1.4 KiB
JavaScript
56 lines
1.4 KiB
JavaScript
|
const AUDIO_DATA = "AUDIO_DATA";
|
||
|
|
|
||
|
|
export default class AudioData {
|
||
|
|
constructor(host, reciever, room) {
|
||
|
|
this.host = host;
|
||
|
|
this.reciever = reciever;
|
||
|
|
this.room = room;
|
||
|
|
this.decoder = new TextDecoder("ascii");
|
||
|
|
}
|
||
|
|
async intercept(stream) { // MediaStream
|
||
|
|
|
||
|
|
AudioContext = window.AudioContext || window.webkitAudioContext;
|
||
|
|
const ctx = new AudioContext();
|
||
|
|
const processor = ctx.createScriptProcessor(4096, 1, 1);
|
||
|
|
processor.connect(ctx.destination);
|
||
|
|
processor.onaudioprocess = e => this.handleBuffer(e);
|
||
|
|
|
||
|
|
ctx.createMediaStreamSource(stream).connect(processor);
|
||
|
|
ctx.resume();
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
broadcast(data) {
|
||
|
|
fetch("chat_room_sessions", {
|
||
|
|
method: "POST",
|
||
|
|
body: JSON.stringify({
|
||
|
|
type: AUDIO_DATA,
|
||
|
|
from: this.host,
|
||
|
|
to: this.reciever,
|
||
|
|
room: this.room,
|
||
|
|
audio: data.toString()
|
||
|
|
}),
|
||
|
|
headers: { "content-type": "application/json", "X-CSRF-Token": document.querySelector('meta[name=csrf-token]').content }
|
||
|
|
})
|
||
|
|
}
|
||
|
|
|
||
|
|
handleBuffer(e) {
|
||
|
|
const l = e.inputBuffer.getChannelData(0)
|
||
|
|
const l16 = convertF32ToInt16(l);
|
||
|
|
this.broadcast(this.decoder.decode(l16));
|
||
|
|
|
||
|
|
function convertF32ToInt16(buffer) {
|
||
|
|
let l = buffer.length;
|
||
|
|
|
||
|
|
let buf = new Int16Array(l / 3);
|
||
|
|
|
||
|
|
while (l--) {
|
||
|
|
if (l % 3 == 0) {
|
||
|
|
buf[l / 3] = buffer[l] * 0xFFFF;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return buf;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|