117 lines
2.7 KiB
C++
117 lines
2.7 KiB
C++
/**
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* @file qtdsp_dualModeAverager.cpp
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* @brief Dual mode averager class for QtDSP;
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Dual-Mode Averaging implmemented following "Understanding Digital Signal Processing" by Richard G. Lyons, 3rd ed., p.791
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* @author Hermann von Hasseln, DL3HVH
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* @version 0.1
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* @date 2012-07-12
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*/
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/*
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*
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* Copyright 2012 Hermann von Hasseln, DL3HVH
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Library General Public License version 2 as
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* published by the Free Software Foundation
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "qtdsp_dualModeAverager.h"
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DualModeAverager::DualModeAverager(int rx, int size)
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: QObject()
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, set(Settings::instance())
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, m_receiver(rx)
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, m_size(size)
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, m_length(set->getSpectrumAveragingCnt(m_receiver))
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{
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m_tmp.resize(m_size);
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m_tmp.fill(-20.0);
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cnt = 0;
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k = 1.0f/m_length;
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CHECKED_CONNECT(
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set,
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SIGNAL(spectrumAveragingCntChanged(QObject*, int, int)),
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this,
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SLOT(setAveragingLength(QObject*, int, int)));
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/*CHECKED_CONNECT(
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set,
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SIGNAL(widebandAveragingCntChanged(QObject*, int)),
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this,
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SLOT(setWidebandAveragingLength(QObject*, int)));*/
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}
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DualModeAverager::~DualModeAverager() {
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m_tmp.clear();
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}
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void DualModeAverager::ProcessDBAverager(qVectorFloat &in, qVectorFloat &out) {
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mutex.lock();
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if (cnt < m_length) {
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for (int i = 0; i < m_size; i++)
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out[i] = m_tmp.at(i) + k * in.at(i);
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cnt++;
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}
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else {
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for (int i = 0; i < m_size; i++)
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out[i] = m_tmp.at(i) + k * (in.at(i) - m_tmp.at(i));
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}
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mutex.unlock();
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m_tmp = out;
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}
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void DualModeAverager::setAveragingLength(QObject* sender, int rx, int value) {
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Q_UNUSED (sender)
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if (m_receiver != rx) return;
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mutex.lock();
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m_length = value;
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k = 1.0f/m_length;
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cnt = 0;
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m_tmp.fill(0.0f);
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mutex.unlock();
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}
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//void DualModeAverager::setWidebandAveragingLength(QObject* sender, int value) {
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//
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// Q_UNUSED (sender)
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//
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// mutex.lock();
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// m_length = value;
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// k = 1.0f/m_length;
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// cnt = 0;
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//
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// m_tmp.fill(0.0f);
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// mutex.unlock();
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//}
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void DualModeAverager::clearBuffer() {
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m_tmp.clear();
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m_tmp.resize(m_size);
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m_tmp.fill(-20.0);
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}
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