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Mods and demods: prevent returning null or infinite values for squared magnitude

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f4exb 2017-05-16 17:46:44 +02:00
parent 747f400a78
commit 416817d0b8
11 changed files with 206 additions and 205 deletions
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366
plugins/channelrx/chanalyzerng/chanalyzerng.h
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@ -1,183 +1,183 @@
///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2017 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 //
// //
// 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/>. //
///////////////////////////////////////////////////////////////////////////////////
#ifndef INCLUDE_CHANALYZERNG_H
#define INCLUDE_CHANALYZERNG_H
#include <dsp/basebandsamplesink.h>
#include <QMutex>
#include <vector>
#include "dsp/interpolator.h"
#include "dsp/ncof.h"
#include "dsp/fftfilt.h"
#include "audio/audiofifo.h"
#include "util/message.h"
#define ssbFftLen 1024
class ChannelAnalyzerNG : public BasebandSampleSink {
public:
ChannelAnalyzerNG(BasebandSampleSink* m_sampleSink);
virtual ~ChannelAnalyzerNG();
void configure(MessageQueue* messageQueue,
int channelSampleRate,
Real Bandwidth,
Real LowCutoff,
int spanLog2,
bool ssb);
int getInputSampleRate() const { return m_running.m_inputSampleRate; }
int getChannelSampleRate() const { return m_running.m_channelSampleRate; }
Real getMagSq() const { return m_magsq; }
virtual void feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end, bool positiveOnly);
virtual void start();
virtual void stop();
virtual bool handleMessage(const Message& cmd);
private:
class MsgConfigureChannelAnalyzer : public Message {
MESSAGE_CLASS_DECLARATION
public:
int getChannelSampleRate() const { return m_channelSampleRate; }
Real getBandwidth() const { return m_Bandwidth; }
Real getLoCutoff() const { return m_LowCutoff; }
int getSpanLog2() const { return m_spanLog2; }
bool getSSB() const { return m_ssb; }
static MsgConfigureChannelAnalyzer* create(
int channelSampleRate,
Real Bandwidth,
Real LowCutoff,
int spanLog2,
bool ssb)
{
return new MsgConfigureChannelAnalyzer(channelSampleRate, Bandwidth, LowCutoff, spanLog2, ssb);
}
private:
int m_channelSampleRate;
Real m_Bandwidth;
Real m_LowCutoff;
int m_spanLog2;
bool m_ssb;
MsgConfigureChannelAnalyzer(
int channelSampleRate,
Real Bandwidth,
Real LowCutoff,
int spanLog2,
bool ssb) :
Message(),
m_channelSampleRate(channelSampleRate),
m_Bandwidth(Bandwidth),
m_LowCutoff(LowCutoff),
m_spanLog2(spanLog2),
m_ssb(ssb)
{ }
};
struct Config
{
int m_frequency;
int m_inputSampleRate;
int m_channelSampleRate;
Real m_Bandwidth;
Real m_LowCutoff;
int m_spanLog2;
bool m_ssb;
Config() :
m_frequency(0),
m_inputSampleRate(96000),
m_channelSampleRate(96000),
m_Bandwidth(5000),
m_LowCutoff(300),
m_spanLog2(3),
m_ssb(false)
{}
};
Config m_config;
Config m_running;
int m_undersampleCount;
fftfilt::cmplx m_sum;
bool m_usb;
Real m_magsq;
bool m_useInterpolator;
NCOF m_nco;
Interpolator m_interpolator;
Real m_interpolatorDistance;
Real m_interpolatorDistanceRemain;
fftfilt* SSBFilter;
fftfilt* DSBFilter;
BasebandSampleSink* m_sampleSink;
SampleVector m_sampleBuffer;
QMutex m_settingsMutex;
void apply(bool force = false);
void processOneSample(Complex& c, fftfilt::cmplx *sideband)
{
int n_out;
int decim = 1<<m_running.m_spanLog2;
if (m_running.m_ssb)
{
n_out = SSBFilter->runSSB(c, &sideband, m_usb);
}
else
{
n_out = DSBFilter->runDSB(c, &sideband);
}
for (int i = 0; i < n_out; i++)
{
// Downsample by 2^(m_scaleLog2 - 1) for SSB band spectrum display
// smart decimation with bit gain using float arithmetic (23 bits significand)
m_sum += sideband[i];
if (!(m_undersampleCount++ & (decim - 1))) // counter LSB bit mask for decimation by 2^(m_scaleLog2 - 1)
{
m_sum /= decim;
m_magsq = (m_sum.real() * m_sum.real() + m_sum.imag() * m_sum.imag())/ (1<<30);
if (m_running.m_ssb & !m_usb)
{ // invert spectrum for LSB
//m_sampleBuffer.push_back(Sample(m_sum.imag() * 32768.0, m_sum.real() * 32768.0));
m_sampleBuffer.push_back(Sample(m_sum.imag(), m_sum.real()));
}
else
{
//m_sampleBuffer.push_back(Sample(m_sum.real() * 32768.0, m_sum.imag() * 32768.0));
m_sampleBuffer.push_back(Sample(m_sum.real(), m_sum.imag()));
}
m_sum = 0;
}
}
}
};
#endif // INCLUDE_CHANALYZERNG_H
///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2017 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 //
// //
// 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/>. //
///////////////////////////////////////////////////////////////////////////////////
#ifndef INCLUDE_CHANALYZERNG_H
#define INCLUDE_CHANALYZERNG_H
#include <dsp/basebandsamplesink.h>
#include <QMutex>
#include <vector>
#include "dsp/interpolator.h"
#include "dsp/ncof.h"
#include "dsp/fftfilt.h"
#include "audio/audiofifo.h"
#include "util/message.h"
#define ssbFftLen 1024
class ChannelAnalyzerNG : public BasebandSampleSink {
public:
ChannelAnalyzerNG(BasebandSampleSink* m_sampleSink);
virtual ~ChannelAnalyzerNG();
void configure(MessageQueue* messageQueue,
int channelSampleRate,
Real Bandwidth,
Real LowCutoff,
int spanLog2,
bool ssb);
int getInputSampleRate() const { return m_running.m_inputSampleRate; }
int getChannelSampleRate() const { return m_running.m_channelSampleRate; }
Real getMagSq() const { return m_magsq == 0 ? 1e-10 : m_magsq; }
virtual void feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end, bool positiveOnly);
virtual void start();
virtual void stop();
virtual bool handleMessage(const Message& cmd);
private:
class MsgConfigureChannelAnalyzer : public Message {
MESSAGE_CLASS_DECLARATION
public:
int getChannelSampleRate() const { return m_channelSampleRate; }
Real getBandwidth() const { return m_Bandwidth; }
Real getLoCutoff() const { return m_LowCutoff; }
int getSpanLog2() const { return m_spanLog2; }
bool getSSB() const { return m_ssb; }
static MsgConfigureChannelAnalyzer* create(
int channelSampleRate,
Real Bandwidth,
Real LowCutoff,
int spanLog2,
bool ssb)
{
return new MsgConfigureChannelAnalyzer(channelSampleRate, Bandwidth, LowCutoff, spanLog2, ssb);
}
private:
int m_channelSampleRate;
Real m_Bandwidth;
Real m_LowCutoff;
int m_spanLog2;
bool m_ssb;
MsgConfigureChannelAnalyzer(
int channelSampleRate,
Real Bandwidth,
Real LowCutoff,
int spanLog2,
bool ssb) :
Message(),
m_channelSampleRate(channelSampleRate),
m_Bandwidth(Bandwidth),
m_LowCutoff(LowCutoff),
m_spanLog2(spanLog2),
m_ssb(ssb)
{ }
};
struct Config
{
int m_frequency;
int m_inputSampleRate;
int m_channelSampleRate;
Real m_Bandwidth;
Real m_LowCutoff;
int m_spanLog2;
bool m_ssb;
Config() :
m_frequency(0),
m_inputSampleRate(96000),
m_channelSampleRate(96000),
m_Bandwidth(5000),
m_LowCutoff(300),
m_spanLog2(3),
m_ssb(false)
{}
};
Config m_config;
Config m_running;
int m_undersampleCount;
fftfilt::cmplx m_sum;
bool m_usb;
Real m_magsq;
bool m_useInterpolator;
NCOF m_nco;
Interpolator m_interpolator;
Real m_interpolatorDistance;
Real m_interpolatorDistanceRemain;
fftfilt* SSBFilter;
fftfilt* DSBFilter;
BasebandSampleSink* m_sampleSink;
SampleVector m_sampleBuffer;
QMutex m_settingsMutex;
void apply(bool force = false);
void processOneSample(Complex& c, fftfilt::cmplx *sideband)
{
int n_out;
int decim = 1<<m_running.m_spanLog2;
if (m_running.m_ssb)
{
n_out = SSBFilter->runSSB(c, &sideband, m_usb);
}
else
{
n_out = DSBFilter->runDSB(c, &sideband);
}
for (int i = 0; i < n_out; i++)
{
// Downsample by 2^(m_scaleLog2 - 1) for SSB band spectrum display
// smart decimation with bit gain using float arithmetic (23 bits significand)
m_sum += sideband[i];
if (!(m_undersampleCount++ & (decim - 1))) // counter LSB bit mask for decimation by 2^(m_scaleLog2 - 1)
{
m_sum /= decim;
m_magsq = (m_sum.real() * m_sum.real() + m_sum.imag() * m_sum.imag())/ (1<<30);
if (m_running.m_ssb & !m_usb)
{ // invert spectrum for LSB
//m_sampleBuffer.push_back(Sample(m_sum.imag() * 32768.0, m_sum.real() * 32768.0));
m_sampleBuffer.push_back(Sample(m_sum.imag(), m_sum.real()));
}
else
{
//m_sampleBuffer.push_back(Sample(m_sum.real() * 32768.0, m_sum.imag() * 32768.0));
m_sampleBuffer.push_back(Sample(m_sum.real(), m_sum.imag()));
}
m_sum = 0;
}
}
}
};
#endif // INCLUDE_CHANALYZERNG_H

6
plugins/channelrx/demodam/amdemod.h
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@ -46,9 +46,9 @@ public:
void getMagSqLevels(Real& avg, Real& peak, int& nbSamples)
{
avg = m_magsqSum / m_magsqCount;
peak = m_magsqPeak;
nbSamples = m_magsqCount;
avg = m_magsqCount == 0 ? 1e-10 : m_magsqSum / m_magsqCount;
peak = m_magsqPeak == 0.0 ? 1e-10 : m_magsqPeak;
nbSamples = m_magsqCount == 0 ? 1 : m_magsqCount;
m_magsqSum = 0.0f;
m_magsqPeak = 0.0f;
m_magsqCount = 0;

6
plugins/channelrx/demodbfm/bfmdemod.h
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@ -71,10 +71,10 @@ public:
void getMagSqLevels(Real& avg, Real& peak, int& nbSamples)
{
avg = m_magsqSum / m_magsqCount;
avg = m_magsqCount == 0 ? 1e-10 : m_magsqSum / m_magsqCount;
m_magsq = avg;
peak = m_magsqPeak;
nbSamples = m_magsqCount;
peak = m_magsqPeak == 0.0 ? 1e-10 : m_magsqPeak;
nbSamples = m_magsqCount == 0 ? 1 : m_magsqCount;
m_magsqSum = 0.0f;
m_magsqPeak = 0.0f;
m_magsqCount = 0;

7
plugins/channelrx/demoddsd/dsddemod.h
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@ -75,15 +75,16 @@ public:
void getMagSqLevels(Real& avg, Real& peak, int& nbSamples)
{
avg = m_magsqSum / m_magsqCount;
avg = m_magsqCount == 0 ? 1e-10 : m_magsqSum / m_magsqCount;
m_magsq = avg;
peak = m_magsqPeak;
nbSamples = m_magsqCount;
peak = m_magsqPeak == 0.0 ? 1e-10 : m_magsqPeak;
nbSamples = m_magsqCount == 0 ? 1 : m_magsqCount;
m_magsqSum = 0.0f;
m_magsqPeak = 0.0f;
m_magsqCount = 0;
}
private:
class MsgConfigureMyPosition : public Message {
MESSAGE_CLASS_DECLARATION

6
plugins/channelrx/demodnfm/nfmdemod.h
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@ -74,10 +74,10 @@ public:
void getMagSqLevels(Real& avg, Real& peak, int& nbSamples)
{
avg = m_magsqSum / m_magsqCount;
avg = m_magsqCount == 0 ? 1e-10 : m_magsqSum / m_magsqCount;
m_magsq = avg;
peak = m_magsqPeak;
nbSamples = m_magsqCount;
peak = m_magsqPeak == 0.0 ? 1e-10 : m_magsqPeak;
nbSamples = m_magsqCount == 0 ? 1 : m_magsqCount;
m_magsqSum = 0.0f;
m_magsqPeak = 0.0f;
m_magsqCount = 0;

6
plugins/channelrx/demodssb/ssbdemod.h
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@ -53,10 +53,10 @@ public:
void getMagSqLevels(Real& avg, Real& peak, int& nbSamples)
{
avg = m_magsqSum / m_magsqCount;
avg = m_magsqCount == 0 ? 1e-10 : m_magsqSum / m_magsqCount;
m_magsq = avg;
peak = m_magsqPeak;
nbSamples = m_magsqCount;
peak = m_magsqPeak == 0.0 ? 1e-10 : m_magsqPeak;
nbSamples = m_magsqCount == 0 ? 1 : m_magsqCount;
m_magsqSum = 0.0f;
m_magsqPeak = 0.0f;
m_magsqCount = 0;

6
plugins/channelrx/demodwfm/wfmdemod.h
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@ -55,10 +55,10 @@ public:
void getMagSqLevels(Real& avg, Real& peak, int& nbSamples)
{
avg = m_magsqSum / m_magsqCount;
avg = m_magsqCount == 0 ? 1e-10 : m_magsqSum / m_magsqCount;
m_magsq = avg;
peak = m_magsqPeak;
nbSamples = m_magsqCount;
peak = m_magsqPeak == 0.0 ? 1e-10 : m_magsqPeak;
nbSamples = m_magsqCount == 0 ? 1 : m_magsqCount;
m_magsqSum = 0.0f;
m_magsqPeak = 0.0f;
m_magsqCount = 0;

2
plugins/channeltx/modam/ammod.h
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@ -190,7 +190,7 @@ public:
virtual void stop();
virtual bool handleMessage(const Message& cmd);
Real getMagSq() const { return m_magsq; }
Real getMagSq() const { return m_magsq == 0.0 ? 1e-10 : m_magsq; }
CWKeyer *getCWKeyer() { return &m_cwKeyer; }

2
plugins/channeltx/modnfm/nfmmod.h
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@ -195,7 +195,7 @@ public:
virtual void stop();
virtual bool handleMessage(const Message& cmd);
Real getMagSq() const { return m_magsq; }
Real getMagSq() const { return m_magsq == 0 ? 1e-10 : m_magsq; }
CWKeyer *getCWKeyer() { return &m_cwKeyer; }

2
plugins/channeltx/modssb/ssbmod.h
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@ -195,7 +195,7 @@ public:
virtual void stop();
virtual bool handleMessage(const Message& cmd);
Real getMagSq() const { return m_magsq; }
Real getMagSq() const { return m_magsq == 0 ? 1e-10 : m_magsq; }
CWKeyer *getCWKeyer() { return &m_cwKeyer; }

2
plugins/channeltx/modwfm/wfmmod.h
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@ -192,7 +192,7 @@ public:
virtual void stop();
virtual bool handleMessage(const Message& cmd);
Real getMagSq() const { return m_magsq; }
Real getMagSq() const { return m_magsq == 0 ? 1e-10 : m_magsq; }
CWKeyer *getCWKeyer() { return &m_cwKeyer; }