sdrangel/plugins/channelrx/demodatv/atvdemod.h

///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2017 F4HKW                                                      //
// for F4EXB / SDRAngel                                                          //
//                                                                               //
// 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_ATVDEMOD_H
#define INCLUDE_ATVDEMOD_H

#include <dsp/basebandsamplesink.h>
#include <dsp/devicesamplesource.h>
#include <dsp/dspcommands.h>
#include <dsp/downchannelizer.h>
#include <QMutex>
#include <QElapsedTimer>
#include <vector>
#include "dsp/nco.h"
#include "dsp/interpolator.h"
#include "dsp/movingaverage.h"
#include "dsp/agc.h"
#include "audio/audiofifo.h"
#include "util/message.h"
#include "atvscreen.h"


class ATVDemod : public BasebandSampleSink
{
	Q_OBJECT

public:

	enum ATVModulation {
	    ATV_FM1,
	    ATV_FM2,
        ATV_AM
	};

	struct ATVConfig
	{
	    int m_intMsps;
	    int m_intLineDurationUs;
	    int m_intTopDurationUs;
	    int m_intFramePerS;
	    int m_intPercentOfRowsToDisplay;
	    float m_fltVoltLevelSynchroTop;
	    float m_fltVoltLevelSynchroBlack;
	    ATVModulation m_enmModulation;
	    bool m_blnHSync;
	    bool m_blnVSync;

	    ATVConfig() :
	        m_intMsps(0),
	        m_intLineDurationUs(0),
	        m_intTopDurationUs(0),
	        m_intFramePerS(0),
	        m_intPercentOfRowsToDisplay(0),
	        m_fltVoltLevelSynchroTop(0),
	        m_fltVoltLevelSynchroBlack(0),
	        m_enmModulation(ATV_FM1),
	        m_blnHSync(false),
	        m_blnVSync(false)
	    {
	    }
	};

    ATVDemod();
	~ATVDemod();

    void configure(MessageQueue* objMessageQueue,
            int intLineDurationUs,
            int intTopDurationUs,
            int intFramePerS,
            int intPercentOfRowsToDisplay,
            float fltVoltLevelSynchroTop,
            float fltVoltLevelSynchroBlack,
            ATVModulation enmModulation,
            bool blnHSync,
            bool blnVSync);

	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);

    bool SetATVScreen(ATVScreen *objScreen);
    void InitATVParameters(int intMsps,
            int intLineDurationUs,
            int intTopDurationUs,
            int intFramePerS,
            int intPercentOfRowsToDisplay,
            float fltVoltLevelSynchroTop,
            float fltVoltLevelSynchroBlack,
            ATVModulation enmModulation,
            bool blnHSync,
            bool blnVSync);
    int GetSampleRate();
    double getMagSq() const { return m_objMagSqAverage.average(); } //!< Beware this is scaled to 2^30

private:

       //*************** ATV PARAMETERS  ***************
       ATVScreen * m_objRegisteredATVScreen;

       int m_intNumberSamplePerLine;
       int m_intNumberSamplePerTop;
       int m_intNumberOfLines;
       bool m_blnInitialized;
       int m_intNumberOfRowsToDisplay;

       float m_fltLevelSynchroTop;
       float m_fltLevelSynchroBlack;

       ATVModulation m_enmModulation;

       //*************** PROCESSING  ***************

       int m_intImageIndex;
       int m_intRowsLimit;
       int m_intSynchroPoints;

       bool m_blnSynchroDetected;
       bool m_blnLineSynchronized;
       bool m_blnImageDetecting;
       bool m_blnVerticalSynchroDetected;

       float m_fltAmpLineAverage;

       float m_fltEffMin;
       float m_fltEffMax;

       float m_fltAmpMin;
       float m_fltAmpMax;
       float m_fltAmpDelta;

       float m_fltBufferI[6];
       float m_fltBufferQ[6];

       int m_intColIndex;
       int m_intRowIndex;

       //*************** RF  ***************

       MovingAverage<double> m_objMagSqAverage;

       //QElapsedTimer m_objTimer;
private:

    class MsgConfigureATVDemod : public Message
    {
		MESSAGE_CLASS_DECLARATION

        public:
            static MsgConfigureATVDemod* create(int intLineDurationUs,
                    int intTopDurationUs,
                    int intFramePerS,
                    int intPercentOfRowsToDisplay,
                    float fltVoltLevelSynchroTop,
                    float fltVoltLevelSynchroBlack,
                    ATVModulation enmModulation,
                    bool blnHSync,
                    bool blnVSync)
            {
                return new MsgConfigureATVDemod(intLineDurationUs,
                        intTopDurationUs,
                        intFramePerS,
                        intPercentOfRowsToDisplay,
                        fltVoltLevelSynchroTop,
                        fltVoltLevelSynchroBlack,
                        enmModulation,
                        blnHSync,
                        blnVSync);
            }

            ATVConfig m_objMsgConfig;

        private:
            MsgConfigureATVDemod(int intLineDurationUs,
                    int intTopDurationUs,
                    int intFramePerS,
                    int intPercentOfRowsToDisplay,
                    float fltVoltLevelSynchroTop,
                    float fltVoltLevelSynchroBlack,
                    ATVModulation enmModulation,
                    bool blnHSync,
                    bool blnVSync) :
                Message()
            {
                m_objMsgConfig.m_enmModulation = enmModulation;
                m_objMsgConfig.m_fltVoltLevelSynchroBlack = fltVoltLevelSynchroBlack;
                m_objMsgConfig.m_fltVoltLevelSynchroTop = fltVoltLevelSynchroTop;
                m_objMsgConfig.m_intFramePerS = intFramePerS;
                m_objMsgConfig.m_intLineDurationUs = intLineDurationUs;
                m_objMsgConfig.m_intTopDurationUs = intTopDurationUs;
                m_objMsgConfig.m_intPercentOfRowsToDisplay = intPercentOfRowsToDisplay;
                m_objMsgConfig.m_blnHSync = blnHSync;
                m_objMsgConfig.m_blnVSync = blnVSync;
            }
    };


    ATVConfig m_objRunning;

    QMutex m_objSettingsMutex;

    void ApplySettings();

};

#endif // INCLUDE_ATVDEMOD_H