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rtp-worker.js
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rtp-worker.js
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var stats = require('./statistics')
var dgram = require('dgram');
var tai = require("t-a-i");
var inter_packet_stats = new stats()
var delay_stats = new stats()
var rms = [new stats(), new stats()]
let seqError = 0
const { parentPort , workerData } = require('worker_threads')
console.log(workerData)
let timeOffset = 0n
let interval = 0.1,
sampleRate = 48000,
bytePerSample = 2,
bytePerSampleStream = 3,
channels = 2
let buffer = [
new Buffer.alloc(interval*sampleRate* bytePerSample * channels),
new Buffer.alloc(interval*sampleRate* bytePerSample * channels)
]
//console.log(buffer)
let currentBuffer = 0
let currentPos = 0
var client = null
var id = -1
var getRtp = (params) => {
console.log(params)
let madd = params.maddress
let port = params.port
let host = params.host
channels = params.channels
id = params.id
let mix = []
for(let g = 0 ; g < channels ; g++)
mix[g] = (g%2 == 0)? [1,0] : [0,1]
//buffer[g] = new Buffer.alloc(interval*sampleRate* bytePerSample * channels)
for(let c = 0 ; c < channels ; c++)
rms[c] = new stats()
// check multi
let b1 = parseInt(madd.split(".")[0])
let isMulticast = true
if(b1 < 224 || b1 > 240)
isMulticast = false
let offset = params.offset || 0
client = dgram.createSocket({ type: "udp4", reuseAddr: true });
client.on('listening', function () {
console.log('UDP Client listening on ' + madd + ":" + port);
client.setBroadcast(true)
client.setMulticastTTL(128);
if(isMulticast) client.addMembership(madd,host);
});
let lastSeq = 0
let lastTime = BigInt(0)
client.on('message', function (message, remote) {
//console.log(".")
let v = message.readInt8(0)
let pt = message.readInt8(1)
let seq = message.readUInt16BE(2)
let ts = (message.readUInt32BE(4) - offset)%Math.pow(2,32)
let ssrc = message.readUInt32BE(8)
// inter packet time
var now = Date.now() - Date.UTC(1972, 0, 1); // 63072000000;
var taioffset = BigInt(tai.unixToAtomic(now) - now)*1000000n - process.hrtime.bigint() + BigInt(Date.now())*1000000n;
let time = process.hrtime.bigint() + taioffset
let diff = Number(time - lastTime)/1000000;
lastTime = time
// computing ts
let realTime = timeOffset + time
let realTS = Number(realTime*BigInt(sampleRate) / 1000000000n )%Math.pow(2,32)
let tsdiff = (realTS - ts + Math.pow(2,32))%Math.pow(2,32)
if(tsdiff > Math.pow(2,31)) tsdiff = tsdiff - Math.pow(2,32)
inter_packet_stats.add(diff)
delay_stats.add(tsdiff)
if(seq > lastSeq+1) {
if(lastSeq==0 && seq != 1)
console.log("init")
else
seqError+=seq-lastSeq-1
//console.log("ERROR Got Seq: ",seq," Should be ",lastSeq + 1)
}
lastSeq = seq
if(lastSeq == 65535) lastSeq = -1
for(let sampleIndex = 0; sampleIndex < (message.length - 12)/(channels * bytePerSampleStream); sampleIndex++)
{
if(currentPos == interval*sampleRate)
{
//console.log(tsdiff/48000,offset,timeOffset)
//console.log("sending " + currentPos + " at " + Date.now())
currentPos = 0
let rmsT = [],
peakT = [],
peakgT = []
for(let c = 0 ; c < channels ; c++) {
rmsT[c] = 10*Math.log10(rms[c].get(true).mean)
peakT[c] = 10*Math.log10(rms[c].get(true).max)
peakgT[c] = 10*Math.log10(rms[c].get().max_global)
}
parentPort.postMessage({
type: "data",
data: {
id: id,
madd: madd,
seqError: seqError,
buffer: buffer[currentBuffer],
delay: delay_stats.get(),
//inter_packets: inter_packet_stats.get(),
rms: rmsT,
peak: peakT,
//peakg: peakgT,
//rtp : {
// payload_type: pt,
// ssrc: ssrc
//},
//sender : {
// ip: remote.address,
// port: remote.port
//}
}
})
currentBuffer = (currentBuffer+1)%2
}
let s, sL = 0, sR = 0
for(let c = 0 ; c < channels ; c++) {
if(bytePerSampleStream == 3)
s = (message.readInt32BE(sampleIndex*bytePerSampleStream*channels+12 + bytePerSampleStream*c - 1) & 0x00FFFFFF) << 8
else
s = Math.pow(2,(8*bytePerSample-1))*(message.readFloatLE(sampleIndex*bytePerSampleStream*channels+12 + bytePerSampleStream*c ))
rms[c].add((s / Math.pow(2,(8*4-1)))*(s / Math.pow(2,(8*4-1))))
sL += mix[c][0]* s
sR += mix[c][1]* s
}
if(sL > 2147483647) sL = 2147483647
if(sR > 2147483647) sR = 2147483647
if(sL < -2147483648) sL = -2147483648
if(sR < -2147483648) sR = -2147483648
if(bytePerSample == 4) {
buffer[currentBuffer].writeInt32LE(sL,bytePerSample * 2*currentPos)
buffer[currentBuffer].writeInt32LE(sR,bytePerSample * 2*currentPos + bytePerSample)
}
else if(bytePerSample==2) {
buffer[currentBuffer].writeInt16LE(sL/Math.pow(2,17),bytePerSample * 2*currentPos)
buffer[currentBuffer].writeInt16LE(sR/Math.pow(2,17),bytePerSample * 2*currentPos + bytePerSample)
}
currentPos += 1
}
//console.log((message.length - 12)/(channels * bytePerSampleStream),message)
});
client.bind(port);
}
parentPort.on("message",(t) => {
switch(t.type) {
case "timeOffset":
timeOffset = t.data
break
case "start":
getRtp(t.data)
break
case "restart":
if(client) client.close()
//console.log(t)
getRtp(t.data)
case "clear":
inter_packet_stats.clear()
delay_stats.clear()
rms.forEach(e => e.clear())
seqError = 0
break
default:
break;
}
})