mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-12-23 18:15:45 -05:00
141 lines
4.1 KiB
C++
141 lines
4.1 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"
|
|
|
|
#define rfFilterFftLength 1024
|
|
|
|
class WFMDemod : public BasebandSampleSink {
|
|
public:
|
|
WFMDemod(BasebandSampleSink* sampleSink);
|
|
virtual ~WFMDemod();
|
|
|
|
void configure(MessageQueue* messageQueue, Real rfBandwidth, Real afBandwidth, Real volume, Real squelch);
|
|
|
|
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);
|
|
|
|
Real getMagSq() const { return m_movingAverage.average(); }
|
|
|
|
private:
|
|
class MsgConfigureWFMDemod : public Message {
|
|
MESSAGE_CLASS_DECLARATION
|
|
|
|
public:
|
|
Real getRFBandwidth() const { return m_rfBandwidth; }
|
|
Real getAFBandwidth() const { return m_afBandwidth; }
|
|
Real getVolume() const { return m_volume; }
|
|
Real getSquelch() const { return m_squelch; }
|
|
|
|
static MsgConfigureWFMDemod* create(Real rfBandwidth, Real afBandwidth, Real volume, Real squelch)
|
|
{
|
|
return new MsgConfigureWFMDemod(rfBandwidth, afBandwidth, volume, squelch);
|
|
}
|
|
|
|
private:
|
|
Real m_rfBandwidth;
|
|
Real m_afBandwidth;
|
|
Real m_volume;
|
|
Real m_squelch;
|
|
|
|
MsgConfigureWFMDemod(Real rfBandwidth, Real afBandwidth, Real volume, Real squelch) :
|
|
Message(),
|
|
m_rfBandwidth(rfBandwidth),
|
|
m_afBandwidth(afBandwidth),
|
|
m_volume(volume),
|
|
m_squelch(squelch)
|
|
{ }
|
|
};
|
|
|
|
struct AudioSample {
|
|
qint16 l;
|
|
qint16 r;
|
|
};
|
|
typedef std::vector<AudioSample> AudioVector;
|
|
|
|
enum RateState {
|
|
RSInitialFill,
|
|
RSRunning
|
|
};
|
|
|
|
struct Config {
|
|
int m_inputSampleRate;
|
|
qint64 m_inputFrequencyOffset;
|
|
Real m_rfBandwidth;
|
|
Real m_afBandwidth;
|
|
Real m_squelch;
|
|
Real m_volume;
|
|
quint32 m_audioSampleRate;
|
|
|
|
Config() :
|
|
m_inputSampleRate(-1),
|
|
m_inputFrequencyOffset(0),
|
|
m_rfBandwidth(-1),
|
|
m_afBandwidth(-1),
|
|
m_squelch(0),
|
|
m_volume(0),
|
|
m_audioSampleRate(0)
|
|
{ }
|
|
};
|
|
|
|
Config m_config;
|
|
Config m_running;
|
|
|
|
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;
|
|
Lowpass<Real> m_lowpass;
|
|
fftfilt* m_rfFilter;
|
|
|
|
Real m_squelchLevel;
|
|
int m_squelchState;
|
|
|
|
Real m_lastArgument;
|
|
MovingAverage<Real> 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 apply();
|
|
};
|
|
|
|
#endif // INCLUDE_WFMDEMOD_H
|