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sdrangel/plugins/channelrx/demodwfm/wfmdemod.h

155 lines
5.0 KiB
C++

///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
// written by Christian Daniel //
// //
// 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_WFMDEMOD_H
#define INCLUDE_WFMDEMOD_H
#include <dsp/basebandsamplesink.h>
#include <QMutex>
#include <vector>
#include "dsp/nco.h"
#include "dsp/interpolator.h"
#include "dsp/lowpass.h"
#include "dsp/movingaverage.h"
#include "dsp/fftfilt.h"
#include "dsp/phasediscri.h"
#include "audio/audiofifo.h"
#include "util/message.h"
#include "wfmdemodsettings.h"
#define rfFilterFftLength 1024
class ThreadedBasebandSampleSink;
class DownChannelizer;
class DeviceSourceAPI;
class WFMDemod : public BasebandSampleSink {
public:
class MsgConfigureWFMDemod : public Message {
MESSAGE_CLASS_DECLARATION
public:
const WFMDemodSettings& getSettings() const { return m_settings; }
bool getForce() const { return m_force; }
static MsgConfigureWFMDemod* create(const WFMDemodSettings& settings, bool force)
{
return new MsgConfigureWFMDemod(settings, force);
}
private:
WFMDemodSettings m_settings;
bool m_force;
MsgConfigureWFMDemod(const WFMDemodSettings& settings, bool force) :
Message(),
m_settings(settings),
m_force(force)
{ }
};
class MsgConfigureChannelizer : public Message {
MESSAGE_CLASS_DECLARATION
public:
int getSampleRate() const { return m_sampleRate; }
int getCenterFrequency() const { return m_centerFrequency; }
static MsgConfigureChannelizer* create(int sampleRate, int centerFrequency)
{
return new MsgConfigureChannelizer(sampleRate, centerFrequency);
}
private:
int m_sampleRate;
int m_centerFrequency;
MsgConfigureChannelizer(int sampleRate, int centerFrequency) :
Message(),
m_sampleRate(sampleRate),
m_centerFrequency(centerFrequency)
{ }
};
WFMDemod(DeviceSourceAPI *deviceAPI);
virtual ~WFMDemod();
void setSampleSink(BasebandSampleSink* sampleSink) { m_sampleSink = sampleSink; }
virtual void feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end, bool po);
virtual void start();
virtual void stop();
virtual bool handleMessage(const Message& cmd);
double getMagSq() const { return m_movingAverage.average(); }
bool getSquelchOpen() const { return m_squelchOpen; }
void getMagSqLevels(double& avg, double& peak, int& nbSamples)
{
avg = m_magsqCount == 0 ? 1e-10 : m_magsqSum / m_magsqCount;
m_magsq = avg;
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:
enum RateState {
RSInitialFill,
RSRunning
};
DeviceSourceAPI* m_deviceAPI;
ThreadedBasebandSampleSink* m_threadedChannelizer;
DownChannelizer* m_channelizer;
WFMDemodSettings m_settings;
NCO m_nco;
Interpolator m_interpolator; //!< Interpolator between sample rate sent from DSP engine and requested RF bandwidth (rational)
Real m_interpolatorDistance;
Real m_interpolatorDistanceRemain;
fftfilt* m_rfFilter;
Real m_squelchLevel;
int m_squelchState;
bool m_squelchOpen;
double m_magsq; //!< displayed averaged value
double m_magsqSum;
double m_magsqPeak;
int m_magsqCount;
Real m_lastArgument;
MovingAverage<double> m_movingAverage;
Real m_fmExcursion;
AudioVector m_audioBuffer;
uint m_audioBufferFill;
BasebandSampleSink* m_sampleSink;
AudioFifo m_audioFifo;
SampleVector m_sampleBuffer;
QMutex m_settingsMutex;
PhaseDiscriminators m_phaseDiscri;
void applySettings(const WFMDemodSettings& settings, bool force = false);
};
#endif // INCLUDE_WFMDEMOD_H