mirror of
https://github.com/f4exb/sdrangel.git
synced 2025-10-26 02:20:26 -04:00
86 lines
3.4 KiB
C++
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;
|
|
}
|