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sdrangel/plugins/samplemimo/metismiso/metismisodecimators.cpp
2020-11-11 10:10:04 +01:00

86 lines
3.4 KiB
C++

///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2020 Edouard Griffiths, F4EXB //
// //
// 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 as version 3 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 V3 for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
///////////////////////////////////////////////////////////////////////////////////
#include "metismisodecimators.h"
MetisMISODecimators::MetisMISODecimators()
{
resetCounters();
}
void MetisMISODecimators::resetCounters()
{
std::fill(m_counters, m_counters+MetisMISOSettings::m_maxReceivers, 0);
}
int MetisMISODecimators::decimate2(qint32 sampleI, qint32 sampleQ, SampleVector& result, unsigned int streamIndex)
{
if (streamIndex < MetisMISOSettings::m_maxReceivers)
{
m_accumulators[streamIndex][m_counters[streamIndex]++] = sampleI;
m_accumulators[streamIndex][m_counters[streamIndex]++] = sampleQ;
if (m_counters[streamIndex] >= 8)
{
SampleVector::iterator it = result.begin();
m_decimatorsIQ[streamIndex].decimate2_cen(&it, m_accumulators[streamIndex], 8);
m_counters[streamIndex] = 0;
return 2; // 2 samples available
}
}
return 0;
}
int MetisMISODecimators::decimate4(qint32 sampleI, qint32 sampleQ, SampleVector& result, unsigned int streamIndex)
{
if (streamIndex < MetisMISOSettings::m_maxReceivers)
{
m_accumulators[streamIndex][m_counters[streamIndex]++] = sampleI;
m_accumulators[streamIndex][m_counters[streamIndex]++] = sampleQ;
if (m_counters[streamIndex] >= 16)
{
SampleVector::iterator it = result.begin();
m_decimatorsIQ[streamIndex].decimate4_cen(&it, m_accumulators[streamIndex], 16);
m_counters[streamIndex] = 0;
return 2; // 2 samples available
}
}
return 0;
}
int MetisMISODecimators::decimate8(qint32 sampleI, qint32 sampleQ, SampleVector& result, unsigned int streamIndex)
{
if (streamIndex < MetisMISOSettings::m_maxReceivers)
{
m_accumulators[streamIndex][m_counters[streamIndex]++] = sampleI;
m_accumulators[streamIndex][m_counters[streamIndex]++] = sampleQ;
if (m_counters[streamIndex] >= 16)
{
SampleVector::iterator it = result.begin();
m_decimatorsIQ[streamIndex].decimate8_cen(&it, m_accumulators[streamIndex], 16);
m_counters[streamIndex] = 0;
return 1; // 1 sample available
}
}
return 0;
}