/// <summary>
/// 处理时钟偏移修正响应信息
/// </summary>
/// <param name="offsetRsp">响应报文</param>
/// <param name="currentTimestamp">收到响应报文时的时间戳</param>
private void HandleResponseFrame(SaiTtsFrame offsetRsp, UInt32 currentTimestamp)
{
try
{
long minOffset = (long)offsetRsp.ReceiverLastSendTimestamp - (long)offsetRsp.SenderLastRecvTimestamp;
long maxOffset = (long)currentTimestamp - (long)offsetRsp.SenderTimestamp;
// Notify observer
_observer.OnTimeOffsetUpdated(minOffset, maxOffset);
}
catch (System.Exception ex)
{
LogUtility.Error(ex.ToString());
}
}
protected override void HandleTtsFrame(SaiTtsFrame ttsFrame)
{
if (ttsFrame.FrameType == SaiFrameType.TTS_OffsetStart)
{
this.Context.RsspEP.DefenseTech = MessageDelayDefenseTech.TTS;
var strategy = new TtsDefenseStrategy(this.Context.FrameTransport, false);
this.Context.DefenseStrategy = strategy;
this.Context.CurrentState = new TtsWaitingforStartState(this.Context, strategy);
this.Context.CurrentState.HandleFrame(ttsFrame);
}
else
{
throw new Exception("SaiInvalideState状态时，收到的第一条帧不是OffsetStart。");
}
}
protected override void HandleTtsFrame(SaiTtsFrame ttsFrame)
{
// 更新TTS
this.TTS.UpdateRemoteLastSendTimestamp(ttsFrame.SenderTimestamp);
this.TTS.UpdateLocalLastRecvTimeStamp(TripleTimestamp.CurrentTimestamp);
// 分类消息。
if (ttsFrame.FrameType == SaiFrameType.TTS_OffsetStart)
{
this.HandleTtsOffsetStartFrame(ttsFrame as SaiTtsFrameOffsetStart);
}
else if (ttsFrame.FrameType == SaiFrameType.TTS_OffsetAnswer1)
{
this.HandleTtsOffsetAnswer1Frame(ttsFrame as SaiTtsFrameOffsetAnswer1);
}
else if (ttsFrame.FrameType == SaiFrameType.TTS_OffsetAnswer2)
{
this.HandleTtsOffsetAnswer2Frame(ttsFrame as SaiTtsFrameOffsetAnswer2);
}
else if (ttsFrame.FrameType == SaiFrameType.TTS_OffsetEstimate)
{
this.HandleTtsEstimateFrame(ttsFrame as SaiTtsFrameEstimate);
}
else if (ttsFrame.FrameType == SaiFrameType.TTS_OffsetEnd)
{
this.HandleTtsOffsetEndFrame(ttsFrame as SaiTtsFrameOffsetEnd);
}
else if (ttsFrame.FrameType == SaiFrameType.TTS_AppData)
{
this.HandleTtsAppFrame(ttsFrame as SaiTtsFrameAppData);
}
else
{
throw new Exception(string.Format("{0}: {1} 中收到非Tts帧。",
this.Context.RsspEP.ID, this.GetType().Name));
}
}
protected virtual long CalcTtsTimeDelay(SaiTtsFrame ttsFrame)
{
return(0);
}
protected virtual void HandleTtsFrame(SaiTtsFrame ttsFrame)
{
LogUtility.Error(string.Format("{0}: {1}.{2} not implement!",
this.Context.RsspEP.ID, this.GetType().Name,
new StackFrame(0).GetMethod().Name.Split('.').Last()));
}
protected override long CalcTtsTimeDelay(SaiTtsFrame ttsFrame)
{
return(this.Calculator.CalcTimeDelay(TripleTimestamp.CurrentTimestamp, ttsFrame.SenderTimestamp));
}
