114 lines
3.4 KiB
C++
114 lines
3.4 KiB
C++
|
/******************************************************************************\
|
||
|
|
* Copyright (c) 2004-2006
|
||
|
|
*
|
||
|
|
* Author(s):
|
||
|
|
* Volker Fischer
|
||
|
|
*
|
||
|
|
******************************************************************************
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify it under
|
||
|
|
* the terms of the GNU General Public License as published by the Free Software
|
||
|
|
* Foundation; either version 2 of the License, or (at your option) any later
|
||
|
|
* version.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it will be useful, but WITHOUT
|
||
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
||
|
|
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
|
||
|
|
* details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License along with
|
||
|
|
* this program; if not, write to the Free Software Foundation, Inc.,
|
||
|
|
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||
|
|
*
|
||
|
|
\******************************************************************************/
|
||
|
|
|
||
|
|
#include "server.h"
|
||
|
|
|
||
|
|
|
||
|
|
/* Implementation *************************************************************/
|
||
|
|
CServer::CServer() : Socket(&ChannelSet)
|
||
|
|
{
|
||
|
|
vecsSendData.Init(BLOCK_SIZE_SAMPLES);
|
||
|
|
|
||
|
|
/* init moving average buffer for response time evaluation */
|
||
|
|
RespTimeMoAvBuf.Init(LEN_MOV_AV_RESPONSE);
|
||
|
|
|
||
|
|
/* connect timer timeout signal */
|
||
|
|
QObject::connect(&Timer, SIGNAL(timeout()), this, SLOT(OnTimer()));
|
||
|
|
}
|
||
|
|
|
||
|
|
void CServer::Start()
|
||
|
|
{
|
||
|
|
/* start main timer */
|
||
|
|
Timer.start(BLOCK_DURATION_MS);
|
||
|
|
|
||
|
|
/* init time for response time evaluation */
|
||
|
|
TimeLastBlock = QTime::currentTime();
|
||
|
|
}
|
||
|
|
|
||
|
|
void CServer::OnTimer()
|
||
|
|
{
|
||
|
|
CVector<int> vecChanID;
|
||
|
|
CVector<CVector<double> > vecvecdData(BLOCK_SIZE_SAMPLES);
|
||
|
|
|
||
|
|
/* get data from all connected clients */
|
||
|
|
ChannelSet.GetBlockAllConC(vecChanID, vecvecdData);
|
||
|
|
|
||
|
|
/* actual processing of audio data -> mix */
|
||
|
|
vecsSendData = ProcessData(vecvecdData);
|
||
|
|
|
||
|
|
/* get number of connected clients from vector size */
|
||
|
|
const int iNumClients = vecvecdData.Size();
|
||
|
|
|
||
|
|
/* send the same data to all connected clients */
|
||
|
|
for (int i = 0; i < iNumClients; i++)
|
||
|
|
{
|
||
|
|
Socket.SendPacket(ChannelSet.PrepSendPacket(vecChanID[i], vecsSendData),
|
||
|
|
ChannelSet.GetAddress(vecChanID[i]),
|
||
|
|
ChannelSet.GetTimeStampIdx(vecChanID[i]));
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/* update response time measurement ------------------------------------- */
|
||
|
|
/* add time difference */
|
||
|
|
const QTime CurTime = QTime::currentTime();
|
||
|
|
|
||
|
|
/* we want to calculate the standard deviation (we assume that the mean is
|
||
|
|
correct at the block period time) */
|
||
|
|
const double dCurAddVal =
|
||
|
|
((double) TimeLastBlock.msecsTo(CurTime) - BLOCK_DURATION_MS);
|
||
|
|
|
||
|
|
RespTimeMoAvBuf.Add(dCurAddVal * dCurAddVal); /* add squared value */
|
||
|
|
|
||
|
|
/* store old time value */
|
||
|
|
TimeLastBlock = CurTime;
|
||
|
|
}
|
||
|
|
|
||
|
|
CVector<short> CServer::ProcessData(CVector<CVector<double> >& vecvecdData)
|
||
|
|
{
|
||
|
|
CVector<short> vecsOutData;
|
||
|
|
vecsOutData.Init(BLOCK_SIZE_SAMPLES);
|
||
|
|
|
||
|
|
const int iNumClients = vecvecdData.Size();
|
||
|
|
|
||
|
|
/* we normalize with sqrt() of N to avoid that the level drops too much
|
||
|
|
in case that a new client connects */
|
||
|
|
const double dNorm = sqrt((double) iNumClients);
|
||
|
|
|
||
|
|
/* mix all audio data from all clients together */
|
||
|
|
for (int i = 0; i < BLOCK_SIZE_SAMPLES; i++)
|
||
|
|
{
|
||
|
|
double dMixedData = 0.0;
|
||
|
|
|
||
|
|
for (int j = 0; j < iNumClients; j++)
|
||
|
|
{
|
||
|
|
dMixedData += vecvecdData[j][i];
|
||
|
|
}
|
||
|
|
|
||
|
|
/* normalization and truncating to short */
|
||
|
|
vecsOutData[i] = Double2Short(dMixedData / dNorm);
|
||
|
|
}
|
||
|
|
|
||
|
|
return vecsOutData;
|
||
|
|
}
|