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sdrangel/plugins/channeltx/modnfm/nfmmod.h

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///////////////////////////////////////////////////////////////////////////////////
// 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_MODNFM_NFMMOD_H_
#define PLUGINS_CHANNELTX_MODNFM_NFMMOD_H_
#include <QMutex>
#include <vector>
#include <iostream>
#include <fstream>
#include "dsp/basebandsamplesource.h"
#include "dsp/nco.h"
#include "dsp/ncof.h"
#include "dsp/interpolator.h"
#include "dsp/lowpass.h"
#include "dsp/bandpass.h"
#include "dsp/movingaverage.h"
#include "dsp/agc.h"
#include "dsp/cwkeyer.h"
#include "audio/audiofifo.h"
#include "util/message.h"
class NFMMod : public BasebandSampleSource {
Q_OBJECT
public:
typedef enum
{
NFMModInputNone,
NFMModInputTone,
NFMModInputFile,
NFMModInputAudio,
NFMModInputCWTone
} NFMModInputAF;
class MsgConfigureFileSourceName : public Message
{
MESSAGE_CLASS_DECLARATION
public:
const QString& getFileName() const { return m_fileName; }
static MsgConfigureFileSourceName* create(const QString& fileName)
{
return new MsgConfigureFileSourceName(fileName);
}
private:
QString m_fileName;
MsgConfigureFileSourceName(const QString& fileName) :
Message(),
m_fileName(fileName)
{ }
};
class MsgConfigureFileSourceSeek : public Message
{
MESSAGE_CLASS_DECLARATION
public:
int getPercentage() const { return m_seekPercentage; }
static MsgConfigureFileSourceSeek* create(int seekPercentage)
{
return new MsgConfigureFileSourceSeek(seekPercentage);
}
protected:
int m_seekPercentage; //!< percentage of seek position from the beginning 0..100
MsgConfigureFileSourceSeek(int seekPercentage) :
Message(),
m_seekPercentage(seekPercentage)
{ }
};
class MsgConfigureFileSourceStreamTiming : public Message {
MESSAGE_CLASS_DECLARATION
public:
static MsgConfigureFileSourceStreamTiming* create()
{
return new MsgConfigureFileSourceStreamTiming();
}
private:
MsgConfigureFileSourceStreamTiming() :
Message()
{ }
};
class MsgConfigureAFInput : public Message
{
MESSAGE_CLASS_DECLARATION
public:
NFMModInputAF getAFInput() const { return m_afInput; }
static MsgConfigureAFInput* create(NFMModInputAF afInput)
{
return new MsgConfigureAFInput(afInput);
}
private:
NFMModInputAF m_afInput;
MsgConfigureAFInput(NFMModInputAF afInput) :
Message(),
m_afInput(afInput)
{ }
};
class MsgReportFileSourceStreamTiming : public Message
{
MESSAGE_CLASS_DECLARATION
public:
std::size_t getSamplesCount() const { return m_samplesCount; }
static MsgReportFileSourceStreamTiming* create(std::size_t samplesCount)
{
return new MsgReportFileSourceStreamTiming(samplesCount);
}
protected:
std::size_t m_samplesCount;
MsgReportFileSourceStreamTiming(std::size_t samplesCount) :
Message(),
m_samplesCount(samplesCount)
{ }
};
class MsgReportFileSourceStreamData : public Message {
MESSAGE_CLASS_DECLARATION
public:
int getSampleRate() const { return m_sampleRate; }
quint32 getRecordLength() const { return m_recordLength; }
static MsgReportFileSourceStreamData* create(int sampleRate,
quint32 recordLength)
{
return new MsgReportFileSourceStreamData(sampleRate, recordLength);
}
protected:
int m_sampleRate;
quint32 m_recordLength;
MsgReportFileSourceStreamData(int sampleRate,
quint32 recordLength) :
Message(),
m_sampleRate(sampleRate),
m_recordLength(recordLength)
{ }
};
//=================================================================
NFMMod();
~NFMMod();
void configure(MessageQueue* messageQueue,
Real rfBandwidth,
Real afBandwidth,
float fmDeviation,
float toneFrequency,
float volumeFactor,
bool channelMute,
bool playLoop,
bool ctcssOn,
float ctcssFrequency);
virtual void pull(Sample& sample);
virtual void pullAudio(int nbSamples);
virtual void start();
virtual void stop();
virtual bool handleMessage(const Message& cmd);
double getMagSq() const { return m_magsq; }
CWKeyer *getCWKeyer() { return &m_cwKeyer; }
signals:
/**
* Level changed
* \param rmsLevel RMS level in range 0.0 - 1.0
* \param peakLevel Peak level in range 0.0 - 1.0
* \param numSamples Number of audio samples analyzed
*/
void levelChanged(qreal rmsLevel, qreal peakLevel, int numSamples);
private:
class MsgConfigureNFMMod : public Message
{
MESSAGE_CLASS_DECLARATION
public:
Real getRFBandwidth() const { return m_rfBandwidth; }
Real getAFBandwidth() const { return m_afBandwidth; }
float getFMDeviation() const { return m_fmDeviation; }
float getToneFrequency() const { return m_toneFrequency; }
float getVolumeFactor() const { return m_volumeFactor; }
bool getChannelMute() const { return m_channelMute; }
bool getPlayLoop() const { return m_playLoop; }
bool getCTCSSOn() const { return m_ctcssOn; }
float getCTCSSFrequency() const { return m_ctcssFrequency; }
static MsgConfigureNFMMod* create(Real rfBandwidth,
Real afBandwidth,
float fmDeviation,
float toneFrequency,
float volumeFactor,
bool channelMute,
bool playLoop,
bool ctcssOn,
float ctcssFrequency)
{
return new MsgConfigureNFMMod(rfBandwidth,
afBandwidth,
fmDeviation,
toneFrequency,
volumeFactor,
channelMute,
playLoop,
ctcssOn,
ctcssFrequency);
}
private:
Real m_rfBandwidth;
Real m_afBandwidth;
float m_fmDeviation;
float m_toneFrequency;
float m_volumeFactor;
bool m_channelMute;
bool m_playLoop;
bool m_ctcssOn;
float m_ctcssFrequency;
MsgConfigureNFMMod(Real rfBandwidth,
Real afBandwidth,
float fmDeviation,
float toneFrequency,
float volumeFactor,
bool channelMute,
bool playLoop,
bool ctcssOn,
float ctcssFrequency) :
Message(),
m_rfBandwidth(rfBandwidth),
m_afBandwidth(afBandwidth),
m_fmDeviation(fmDeviation),
m_toneFrequency(toneFrequency),
m_volumeFactor(volumeFactor),
m_channelMute(channelMute),
m_playLoop(playLoop),
m_ctcssOn(ctcssOn),
m_ctcssFrequency(ctcssFrequency)
{ }
};
//=================================================================
struct AudioSample {
qint16 l;
qint16 r;
};
typedef std::vector<AudioSample> AudioVector;
enum RateState {
RSInitialFill,
RSRunning
};
struct Config {
int m_basebandSampleRate;
int m_outputSampleRate;
qint64 m_inputFrequencyOffset;
Real m_rfBandwidth;
Real m_afBandwidth;
float m_fmDeviation;
float m_toneFrequency;
float m_volumeFactor;
quint32 m_audioSampleRate;
bool m_channelMute;
bool m_playLoop;
bool m_ctcssOn;
float m_ctcssFrequency;
Config() :
m_basebandSampleRate(0),
m_outputSampleRate(-1),
m_inputFrequencyOffset(0),
m_rfBandwidth(-1),
m_afBandwidth(-1),
m_fmDeviation(5000.0f),
m_toneFrequency(1000.0f),
m_volumeFactor(1.0f),
m_audioSampleRate(0),
m_channelMute(false),
m_playLoop(false),
m_ctcssOn(false),
m_ctcssFrequency(88.5)
{ }
};
//=================================================================
Config m_config;
Config m_running;
NCO m_carrierNco;
NCOF m_toneNco;
NCOF m_ctcssNco;
float m_modPhasor; //!< baseband modulator phasor
Complex m_modSample;
Interpolator m_interpolator;
Real m_interpolatorDistance;
Real m_interpolatorDistanceRemain;
bool m_interpolatorConsumed;
Lowpass<Real> m_lowpass;
Bandpass<Real> m_bandpass;
double m_magsq;
MovingAverage<double> m_movingAverage;
SimpleAGC m_volumeAGC;
AudioVector m_audioBuffer;
uint m_audioBufferFill;
AudioFifo m_audioFifo;
SampleVector m_sampleBuffer;
QMutex m_settingsMutex;
std::ifstream m_ifstream;
QString m_fileName;
quint64 m_fileSize; //!< raw file size (bytes)
quint32 m_recordLength; //!< record length in seconds computed from file size
int m_sampleRate;
NFMModInputAF m_afInput;
quint32 m_levelCalcCount;
Real m_peakLevel;
Real m_levelSum;
CWKeyer m_cwKeyer;
CWSmoother m_cwSmoother;
static const int m_levelNbSamples;
void apply();
void pullAF(Real& sample);
void calculateLevel(Real& sample);
void modulateSample();
void openFileStream();
void seekFileStream(int seekPercentage);
};
#endif /* PLUGINS_CHANNELTX_MODNFM_NFMMOD_H_ */
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