sdrangel/plugins/channeltx/modam/ammod.h

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4.2 KiB
C++

///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2016 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 PLUGINS_CHANNELTX_MODAM_AMMOD_H_
#define PLUGINS_CHANNELTX_MODAM_AMMOD_H_
#include <QMutex>
#include <vector>
#include "dsp/basebandsamplesource.h"
#include "dsp/nco.h"
#include "dsp/interpolator.h"
#include "dsp/lowpass.h"
#include "dsp/movingaverage.h"
#include "dsp/agc.h"
#include "audio/audiofifo.h"
#include "util/message.h"
class AMMod : public BasebandSampleSource {
Q_OBJECT
public:
AMMod();
~AMMod();
void configure(MessageQueue* messageQueue, Real rfBandwidth, Real afBandwidth, float modFactor, bool audioMute);
virtual void pull(Sample& sample);
virtual void start();
virtual void stop();
virtual bool handleMessage(const Message& cmd);
Real getMagSq() const { return m_magsq; }
private:
class MsgConfigureAMMod : public Message {
MESSAGE_CLASS_DECLARATION
public:
Real getRFBandwidth() const { return m_rfBandwidth; }
Real getAFBandwidth() const { return m_afBandwidth; }
float getModFactor() const { return m_modFactor; }
bool getAudioMute() const { return m_audioMute; }
static MsgConfigureAMMod* create(Real rfBandwidth, Real afBandwidth, float modFactor, bool audioMute)
{
return new MsgConfigureAMMod(rfBandwidth, afBandwidth, modFactor, audioMute);
}
private:
Real m_rfBandwidth;
Real m_afBandwidth;
float m_modFactor;
bool m_audioMute;
MsgConfigureAMMod(Real rfBandwidth, Real afBandwidth, float modFactor, bool audioMute) :
Message(),
m_rfBandwidth(rfBandwidth),
m_afBandwidth(afBandwidth),
m_modFactor(modFactor),
m_audioMute(audioMute)
{ }
};
struct AudioSample {
qint16 l;
qint16 r;
};
typedef std::vector<AudioSample> AudioVector;
enum RateState {
RSInitialFill,
RSRunning
};
struct Config {
int m_outputSampleRate;
qint64 m_inputFrequencyOffset;
Real m_rfBandwidth;
Real m_afBandwidth;
float m_modFactor;
quint32 m_audioSampleRate;
bool m_audioMute;
Config() :
m_outputSampleRate(-1),
m_inputFrequencyOffset(0),
m_rfBandwidth(-1),
m_afBandwidth(-1),
m_modFactor(0.2f),
m_audioSampleRate(0),
m_audioMute(false)
{ }
};
Config m_config;
Config m_running;
NCO m_carrierNco;
NCO m_toneNco;
Complex m_modSample;
Interpolator m_interpolator;
Real m_interpolatorDistance;
Real m_interpolatorDistanceRemain;
bool m_interpolatorConsumed;
Lowpass<Real> m_lowpass;
Real m_magsq;
MovingAverage<Real> m_movingAverage;
SimpleAGC m_volumeAGC;
AudioVector m_audioBuffer;
uint m_audioBufferFill;
AudioFifo m_audioFifo;
SampleVector m_sampleBuffer;
QMutex m_settingsMutex;
void apply();
};
#endif /* PLUGINS_CHANNELTX_MODAM_AMMOD_H_ */