/// <summary>
/// Processes RTCP packets.
/// </summary>
/// <param name="packets">The packets to process.</param>
public override void ProcessRTCP(RTCPPacket[] packets)
{
if (_Encoder != null)
{
foreach (var packet in packets)
{
if (packet is RTCPReportPacket)
{
_ReportsReceived++;
var report = (RTCPReportPacket)packet;
foreach (var block in report.ReportBlocks)
{
Log.DebugFormat("Opus report: {0} packet loss ({1} cumulative packets lost)", block.PercentLost.ToString("P2"), block.CumulativeNumberOfPacketsLost.ToString());
if (block.PercentLost > 0)
{
_LosslessCount = 0;
_LossyCount++;
if (_LossyCount > 5 && _Encoder.Quality > 0.0)
{
_LossyCount = 0;
_Encoder.Quality = MathAssistant.Max(0.0, _Encoder.Quality - 0.1);
Log.InfoFormat("Decreasing Opus encoder quality to {0}.", _Encoder.Quality.ToString("P2"));
}
}
else
{
_LossyCount = 0;
_LosslessCount++;
if (_LosslessCount > 5 && _Encoder.Quality < 1.0)
{
_LosslessCount = 0;
_Encoder.Quality = MathAssistant.Min(1.0, _Encoder.Quality + 0.1);
Log.InfoFormat("Increasing Opus encoder quality to {0}.", _Encoder.Quality.ToString("P2"));
}
}
if (!DisableFEC && !FecActive && _ReportsReceived > _MinimumReportsBeforeFEC)
{
if ((block.PercentLost * 100) > PercentLossToTriggerFEC)
{
Log.InfoFormat("Activating FEC for Opus audio stream.");
_Encoder.ActivateFEC(PercentLossToTriggerFEC);
FecActive = true;
}
}
}
}
}
}
}
public long GetIndex(long value, out long rolloverCounter) // i
{
if (HighestValue == -1)
{
HighestValue = value;
rolloverCounter = RolloverCounter;
return(value);
}
long v;
if (HighestValue < _RolloverSize_2)
{
// use > instead of >= to favour forward movement
if (value - HighestValue > _RolloverSize_2)
{
v = (RolloverCounter - 1) % 4294967296;
}
else
{
v = RolloverCounter;
HighestValue = MathAssistant.Max(HighestValue, value);
}
}
else
{
// use >= instead of > to favour forward movement
if (HighestValue - _RolloverSize_2 >= value)
{
v = (RolloverCounter + 1) % 4294967296;
HighestValue = value;
RolloverCounter = v;
}
else
{
v = RolloverCounter;
HighestValue = MathAssistant.Max(HighestValue, value);
}
}
rolloverCounter = v;
return(_RolloverSize * v + value);
}
/// <summary>
/// Processes RTCP packets.
/// </summary>
/// <param name="packets">The packets to process.</param>
public override void ProcessRTCP(RTCPPacket[] packets)
{
if (_Encoder != null)
{
foreach (var packet in packets)
{
if (packet is RTCPPliPacket)
{
Log.Info("Received PLI for video stream.");
_Encoder.ForceKeyFrame();
}
else if (packet is RTCPReportPacket)
{
var report = (RTCPReportPacket)packet;
foreach (var block in report.ReportBlocks)
{
Log.DebugFormat("VP8 report: {0} packet loss ({1} cumulative packets lost)", block.PercentLost.ToString("P2"), block.CumulativeNumberOfPacketsLost.ToString());
if (block.PercentLost > 0)
{
_LosslessCount = 0;
_LossyCount++;
if (_LossyCount > 5 && (_Encoder.Quality > 0.0 || _Encoder.Bitrate > 64 || _Encoder.Scale > 0.2))
{
_LossyCount = 0;
if (_Encoder.Quality > 0.0)
{
_Encoder.Quality = MathAssistant.Max(0.0, _Encoder.Quality - 0.1);
Log.InfoFormat("Decreasing VP8 encoder quality to {0}.", _Encoder.Quality.ToString("P2"));
}
if (_Encoder.Bitrate > 64)
{
_Encoder.Bitrate = MathAssistant.Max(64, _Encoder.Bitrate - 64);
Log.InfoFormat("Decreasing VP8 encoder bitrate to {0}.", _Encoder.Bitrate.ToString());
}
if (_Encoder.Scale > 0.2)
{
_Encoder.Scale = MathAssistant.Max(0.2, _Encoder.Scale - 0.2);
Log.InfoFormat("Decreasing VP8 encoder scale to {0}.", _Encoder.Scale.ToString("P2"));
}
}
}
else
{
_LossyCount = 0;
_LosslessCount++;
if (_LosslessCount > 5 && (_Encoder.Quality < 1.0 || _Encoder.Bitrate < 640 || _Encoder.Scale < 1.0))
{
_LosslessCount = 0;
if (_Encoder.Quality < 1.0)
{
_Encoder.Quality = MathAssistant.Min(1.0, _Encoder.Quality + 0.1);
Log.InfoFormat("Increasing VP8 encoder quality to {0}.", _Encoder.Quality.ToString("P2"));
}
if (_Encoder.Bitrate < 640)
{
_Encoder.Bitrate = MathAssistant.Min(640, _Encoder.Bitrate + 64);
Log.InfoFormat("Increasing VP8 encoder bitrate to {0}.", _Encoder.Bitrate.ToString());
}
if (_Encoder.Scale < 1.0)
{
_Encoder.Scale = MathAssistant.Min(1.0, _Encoder.Scale + 0.2);
Log.InfoFormat("Increasing VP8 encoder scale to {0}.", _Encoder.Scale.ToString("P2"));
}
}
}
}
}
}
}
}