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CTCSS detector: fixed crash on destructor. Fixes #680
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@ -1,68 +1,72 @@
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/*
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* ctcssdetector.cpp
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*
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* Created on: Jun 16, 2015
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* Author: f4exb
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*/
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#include <math.h>
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#include "dsp/ctcssdetector.h"
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#include "ctcssfrequencies.h"
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//////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2015-2020 Edouard Griffiths, F4EXB //
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// //
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// See: http://www.embedded.com/design/connectivity/4025660/Detecting-CTCSS-tones-with-Goertzel-s-algorithm //
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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 General Public License as published by //
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// the Free Software Foundation as version 3 of the License, or //
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// (at your option) any later version. //
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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 V3 for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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//////////////////////////////////////////////////////////////////////////////////////////////////////////////
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#undef M_PI
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#define M_PI 3.14159265358979323846
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#define _USE_MATH_DEFINES
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#include <cmath>
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#include "dsp/ctcssdetector.h"
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CTCSSDetector::CTCSSDetector() :
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N(0),
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sampleRate(0),
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samplesProcessed(0),
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maxPowerIndex(0),
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toneDetected(false),
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maxPower(0.0)
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m_N(0),
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m_sampleRate(0),
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m_samplesProcessed(0),
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m_maxPowerIndex(0),
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m_toneDetected(false),
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m_maxPower(0.0)
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{
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nTones = CTCSSFrequencies::m_nbFreqs;
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k = new Real[nTones];
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coef = new Real[nTones];
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toneSet = new Real[nTones];
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u0 = new Real[nTones];
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u1 = new Real[nTones];
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power = new Real[nTones];
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toneSet = CTCSSFrequencies::m_Freqs;
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m_k = new Real[CTCSSFrequencies::m_nbFreqs];
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m_coef = new Real[CTCSSFrequencies::m_nbFreqs];
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m_u0 = new Real[CTCSSFrequencies::m_nbFreqs];
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m_u1 = new Real[CTCSSFrequencies::m_nbFreqs];
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m_power = new Real[CTCSSFrequencies::m_nbFreqs];
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}
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CTCSSDetector::CTCSSDetector(int _nTones, Real *tones) :
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N(0),
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sampleRate(0),
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samplesProcessed(0),
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maxPowerIndex(0),
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toneDetected(false),
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maxPower(0.0)
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m_N(0),
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m_sampleRate(0),
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m_samplesProcessed(0),
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m_maxPowerIndex(0),
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m_toneDetected(false),
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m_maxPower(0.0)
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{
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nTones = CTCSSFrequencies::m_nbFreqs;
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k = new Real[nTones];
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coef = new Real[nTones];
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toneSet = new Real[nTones];
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u0 = new Real[nTones];
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u1 = new Real[nTones];
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power = new Real[nTones];
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toneSet = CTCSSFrequencies::m_Freqs;
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m_k = new Real[CTCSSFrequencies::m_nbFreqs];
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m_coef = new Real[CTCSSFrequencies::m_nbFreqs];
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m_u0 = new Real[CTCSSFrequencies::m_nbFreqs];
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m_u1 = new Real[CTCSSFrequencies::m_nbFreqs];
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m_power = new Real[CTCSSFrequencies::m_nbFreqs];
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}
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CTCSSDetector::~CTCSSDetector()
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{
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delete[] k;
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delete[] coef;
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delete[] toneSet;
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delete[] u0;
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delete[] u1;
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delete[] power;
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delete[] m_k;
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delete[] m_coef;
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delete[] m_u0;
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delete[] m_u1;
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delete[] m_power;
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}
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void CTCSSDetector::setCoefficients(int zN, int _samplerate )
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void CTCSSDetector::setCoefficients(int N, int sampleRate)
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{
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N = zN; // save the basic parameters for use during analysis
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sampleRate = _samplerate;
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m_N = N; // save the basic parameters for use during analysis
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m_sampleRate = sampleRate;
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// for each of the frequencies (tones) of interest calculate
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// k and the associated filter coefficient as per the Goertzel
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@ -71,10 +75,10 @@ void CTCSSDetector::setCoefficients(int zN, int _samplerate )
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// for later display. The tone set is specified in the
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// constructor. Notice that the resulting coefficients are
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// independent of N.
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for (int j = 0; j < nTones; ++j)
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for (int j = 0; j < CTCSSFrequencies::m_nbFreqs; ++j)
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{
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k[j] = ((double)N * toneSet[j]) / (double)sampleRate;
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coef[j] = 2.0 * cos((2.0 * M_PI * toneSet[j])/(double)sampleRate);
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m_k[j] = ((double) m_N * CTCSSFrequencies::m_Freqs[j]) / (double)m_sampleRate;
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m_coef[j] = 2.0 * cos((2.0 * M_PI * CTCSSFrequencies::m_Freqs[j])/(double)m_sampleRate);
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}
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}
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@ -84,12 +88,12 @@ bool CTCSSDetector::analyze(Real *sample)
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{
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feedback(*sample); // Goertzel feedback
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samplesProcessed += 1;
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m_samplesProcessed += 1;
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if (samplesProcessed == N) // completed a block of N
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if (m_samplesProcessed == m_N) // completed a block of N
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{
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feedForward(); // calculate the power at each tone
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samplesProcessed = 0;
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feedForward(); // calculate the m_power at each tone
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m_samplesProcessed = 0;
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return true; // have a result
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}
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else
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@ -104,11 +108,11 @@ void CTCSSDetector::feedback(Real in)
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Real t;
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// feedback for each tone
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for (int j = 0; j < nTones; ++j)
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for (int j = 0; j < CTCSSFrequencies::m_nbFreqs; ++j)
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{
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t = u0[j];
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u0[j] = in + (coef[j] * u0[j]) - u1[j];
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u1[j] = t;
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t = m_u0[j];
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m_u0[j] = in + (m_coef[j] * m_u0[j]) - m_u1[j];
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m_u1[j] = t;
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}
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}
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@ -117,10 +121,10 @@ void CTCSSDetector::feedForward()
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{
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initializePower();
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for (int j = 0; j < nTones; ++j)
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for (int j = 0; j < CTCSSFrequencies::m_nbFreqs; ++j)
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{
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power[j] = (u0[j] * u0[j]) + (u1[j] * u1[j]) - (coef[j] * u0[j] * u1[j]);
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u0[j] = u1[j] = 0.0; // reset for next block.
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m_power[j] = (m_u0[j] * m_u0[j]) + (m_u1[j] * m_u1[j]) - (m_coef[j] * m_u0[j] * m_u1[j]);
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m_u0[j] = m_u1[j] = 0.0; // reset for next block.
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}
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evaluatePower();
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@ -129,23 +133,23 @@ void CTCSSDetector::feedForward()
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void CTCSSDetector::reset()
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{
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for (int j = 0; j < nTones; ++j)
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for (int j = 0; j < CTCSSFrequencies::m_nbFreqs; ++j)
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{
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power[j] = u0[j] = u1[j] = 0.0; // reset
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m_power[j] = m_u0[j] = m_u1[j] = 0.0; // reset
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}
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samplesProcessed = 0;
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maxPower = 0.0;
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maxPowerIndex = 0;
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toneDetected = false;
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m_samplesProcessed = 0;
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m_maxPower = 0.0;
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m_maxPowerIndex = 0;
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m_toneDetected = false;
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}
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void CTCSSDetector::initializePower()
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{
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for (int j = 0; j < nTones; ++j)
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for (int j = 0; j < CTCSSFrequencies::m_nbFreqs; ++j)
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{
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power[j] = 0.0; // reset
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m_power[j] = 0.0; // reset
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}
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}
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@ -153,19 +157,19 @@ void CTCSSDetector::initializePower()
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void CTCSSDetector::evaluatePower()
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{
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Real sumPower = 0.0;
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Real aboveAvg = 2.0; // Arbitrary max power above average threshold
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maxPower = 0.0;
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Real aboveAvg = 2.0; // Arbitrary max m_power above average threshold
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m_maxPower = 0.0;
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for (int j = 0; j < nTones; ++j)
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for (int j = 0; j < CTCSSFrequencies::m_nbFreqs; ++j)
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{
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sumPower += power[j];
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sumPower += m_power[j];
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if (power[j] > maxPower)
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if (m_power[j] > m_maxPower)
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{
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maxPower = power[j];
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maxPowerIndex = j;
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m_maxPower = m_power[j];
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m_maxPowerIndex = j;
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}
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}
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toneDetected = (maxPower > (sumPower/nTones) + aboveAvg);
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m_toneDetected = (m_maxPower > (sumPower/CTCSSFrequencies::m_nbFreqs) + aboveAvg);
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}
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@ -1,16 +1,28 @@
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/*
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* ctcssdetector.h
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*
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* Created on: Jun 16, 2015
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* Author: f4exb
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* See: http://www.embedded.com/design/connectivity/4025660/Detecting-CTCSS-tones-with-Goertzel-s-algorithm
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*/
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//////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2015-2020 Edouard Griffiths, F4EXB //
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// //
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// See: http://www.embedded.com/design/connectivity/4025660/Detecting-CTCSS-tones-with-Goertzel-s-algorithm //
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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 General Public License as published by //
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// the Free Software Foundation as version 3 of the License, or //
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// (at your option) any later version. //
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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 V3 for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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//////////////////////////////////////////////////////////////////////////////////////////////////////////////
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#ifndef INCLUDE_GPL_DSP_CTCSSDETECTOR_H_
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#define INCLUDE_GPL_DSP_CTCSSDETECTOR_H_
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#include "dsp/dsptypes.h"
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#include "export.h"
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#include "ctcssfrequencies.h"
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/** CTCSSDetector: Continuous Tone Coded Squelch System
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* tone detector class based on the Modified Goertzel
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@ -18,46 +30,42 @@
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*/
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class SDRBASE_API CTCSSDetector {
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public:
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// Constructors and Destructor
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CTCSSDetector();
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// allows user defined CTCSS tone set
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CTCSSDetector(int _nTones, Real *tones);
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CTCSSDetector(int _nTones, Real *tones); //!< allows user defined CTCSS tone set
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virtual ~CTCSSDetector();
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// setup the basic parameters and coefficients
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void setCoefficients(
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int zN, // the algorithm "block" size
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int SampleRate); // input signal sample rate
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int N, // the algorithm "block" size
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int sampleRate // input signal sample rate
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);
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// set the detection threshold
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void setThreshold(double thold);
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// analyze a sample set and optionally filter
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// the tone frequencies.
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// analyze a sample set and optionally filter the tone frequencies.
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bool analyze(Real *sample); // input signal sample
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// get the number of defined tones.
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int getNTones() const {
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return nTones;
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return CTCSSFrequencies::m_nbFreqs;
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}
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// get the tone set
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const Real *getToneSet() const
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{
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return toneSet;
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const Real *getToneSet() const {
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return CTCSSFrequencies::m_Freqs;
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}
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// get the currently detected tone, if any
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bool getDetectedTone(int &maxTone) const
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{
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maxTone = maxPowerIndex;
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return toneDetected;
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maxTone = m_maxPowerIndex;
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return m_toneDetected;
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}
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// Get the max power at the detected tone.
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Real getMaxPower() const
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{
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return maxPower;
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// Get the max m_power at the detected tone.
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Real getMaxPower() const {
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return m_maxPower;
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}
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void reset(); // reset the analysis algorithm
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@ -70,19 +78,17 @@ protected:
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void feedForward();
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private:
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int N;
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int sampleRate;
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int nTones;
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int samplesProcessed;
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int maxPowerIndex;
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bool toneDetected;
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Real maxPower;
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Real *k;
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Real *coef;
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const float *toneSet;
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Real *u0;
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Real *u1;
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Real *power;
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int m_N;
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int m_sampleRate;
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int m_samplesProcessed;
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int m_maxPowerIndex;
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bool m_toneDetected;
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Real m_maxPower;
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Real *m_k;
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Real *m_coef;
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Real *m_u0;
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Real *m_u1;
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Real *m_power;
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};
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