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speed optimzation, remove normalization value (I guess it is not needed...)

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This commit is contained in:
Volker Fischer 2009-06-12 16:06:45 +00:00
parent 5f9dc603a1
commit 04da12c959
1 changed files with 21 additions and 12 deletions
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33
src/server.cpp
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@ -160,25 +160,34 @@ void CServer::OnTimer()
CVector<short> CServer::ProcessData ( CVector<CVector<double> >& vecvecdData,
CVector<double>& vecdGains )
{
CVector<short> vecsOutData ( MIN_SERVER_BLOCK_SIZE_SAMPLES );
int i;
// init return vector with zeros since we mix all channels on that vector
CVector<short> vecsOutData ( MIN_SERVER_BLOCK_SIZE_SAMPLES, 0 );
const int iNumClients = vecvecdData.Size();
// some offset to avoid overload when mixing clients together
const double dNorm = (double) 1.25;
// mix all audio data from all clients together
for ( int i = 0; i < MIN_SERVER_BLOCK_SIZE_SAMPLES; i++ )
for ( int j = 0; j < iNumClients; j++ )
{
double dMixedData = 0.0;
for ( int j = 0; j < iNumClients; j++ )
// if channel gain is 1, avoid multiplication for speed optimization
if ( vecdGains[j] == static_cast<double> ( 1.0 ) )
{
dMixedData += vecvecdData[j][i] * vecdGains[j];
for ( int i = 0; i < MIN_SERVER_BLOCK_SIZE_SAMPLES; i++ )
{
vecsOutData[i] =
Double2Short ( vecsOutData[i] + vecvecdData[j][i] );
}
}
else
{
for ( int i = 0; i < MIN_SERVER_BLOCK_SIZE_SAMPLES; i++ )
{
vecsOutData[i] =
Double2Short ( vecsOutData[i] +
vecvecdData[j][i] * vecdGains[j] );
}
}
// normalization and truncating to short
vecsOutData[i] = Double2Short ( dMixedData / dNorm );
}
return vecsOutData;