private void UdpAudioDecode()
{
try
{
while (!_stop)
{
try
{
var encodedOpusAudio = new byte[0];
_encodedAudio.TryTake(out encodedOpusAudio, 100000, _stopFlag.Token);
var time = GetTickCount64(); //should add at the receive instead?
if (encodedOpusAudio != null && encodedOpusAudio.Length > 36)
{
// process
// check if we should play audio
var myClient = IsClientMetaDataValid(_guid);
if (myClient != null && RadioDCSSyncServer.DcsPlayerRadioInfo.IsCurrent())
{
//Decode bytes
var udpVoicePacket = UDPVoicePacket.DecodeVoicePacket(encodedOpusAudio);
// check the radio
RadioReceivingState receivingState = null;
var receivingRadio =
RadioDCSSyncServer.DcsPlayerRadioInfo.CanHearTransmission(udpVoicePacket.Frequency,
udpVoicePacket.Modulation,
udpVoicePacket.UnitId, out receivingState);
//Check that we're not transmitting on this radio
double receivingPower = 0;
float lineOfSightLoss = 0;
if (receivingRadio != null && receivingState != null
&&
(receivingRadio.modulation == 2
// INTERCOM Modulation is 2 so if its two dont bother checking LOS and Range
||
(
HasLineOfSight(udpVoicePacket, out lineOfSightLoss)
&&
InRange(udpVoicePacket, out receivingPower)
&&
!ShouldBlockRxAsTransmitting(receivingState.ReceivedOn)
)
)
)
{
// RadioReceivingState[receivingState.ReceivedOn] = receivingState;
//DECODE audio
int len1;
var decoded = _decoder.Decode(udpVoicePacket.AudioPart1Bytes,
udpVoicePacket.AudioPart1Bytes.Length, out len1);
int len2;
var decoded2 = _decoder.Decode(udpVoicePacket.AudioPart2Bytes,
udpVoicePacket.AudioPart2Bytes.Length, out len2);
if (len1 > 0 && len2 > 0)
{
// for some reason if this is removed then it lags?!
//guess it makes a giant buffer and only uses a little?
var tmp = new byte[len1 + len2];
Buffer.BlockCopy(decoded, 0, tmp, 0, len1);
Buffer.BlockCopy(decoded2, 0, tmp, len1, len2);
//ALL GOOD!
//create marker for bytes
var audio = new ClientAudio
{
ClientGuid = udpVoicePacket.Guid,
PcmAudioShort = ConversionHelpers.ByteArrayToShortArray(tmp),
//Convert to Shorts!
ReceiveTime = GetTickCount64(),
Frequency = udpVoicePacket.Frequency,
Modulation = udpVoicePacket.Modulation,
Volume = receivingRadio.volume,
ReceivedRadio = receivingState.ReceivedOn,
UnitId = udpVoicePacket.UnitId,
Encryption = udpVoicePacket.Encryption,
Decryptable =
udpVoicePacket.Encryption == receivingRadio.encKey && receivingRadio.enc,
// mark if we can decrypt it
RadioReceivingState = receivingState,
RecevingPower = receivingPower,
LineOfSightLoss = lineOfSightLoss // Loss of 1.0 or greater is total loss
};
//add to JitterBuffer!
lock (_lock)
{
_jitterBuffer.AddAudio(audio);
}
}
}
}
}
}
catch (Exception ex)
{
Logger.Info("Failed Decoding");
}
}
}
catch (OperationCanceledException)
{
Logger.Info("Stopped DeJitter Buffer");
}
}
