atvmod.h

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// Copyright (C) 2017 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                  //
// (at your option) any later version.                                           //
//                                                                               //
// 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_MODATV_ATVMOD_H_
#define PLUGINS_CHANNELTX_MODATV_ATVMOD_H_

#include <vector>

#include <QObject>
#include <QMutex>
#include <QNetworkRequest>

#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/videoio.hpp>

#include <stdint.h>

#include "dsp/basebandsamplesource.h"
#include "channel/channelapi.h"
#include "dsp/nco.h"
#include "dsp/interpolator.h"
#include "util/movingaverage.h"
#include "dsp/fftfilt.h"
#include "util/message.h"

#include "atvmodsettings.h"

class QNetworkAccessManager;
class QNetworkReply;
class DeviceAPI;
class ThreadedBasebandSampleSource;
class UpChannelizer;

class ATVMod : public BasebandSampleSource, public ChannelAPI {
    Q_OBJECT

public:
    class MsgConfigureATVMod : public Message {
        MESSAGE_CLASS_DECLARATION

    public:
        const ATVModSettings& getSettings() const { return m_settings; }
        bool getForce() const { return m_force; }

        static MsgConfigureATVMod* create(const ATVModSettings& settings, bool force)
        {
            return new MsgConfigureATVMod(settings, force);
        }

    private:
        ATVModSettings m_settings;
        bool m_force;

        MsgConfigureATVMod(const ATVModSettings& settings, bool force) :
            Message(),
            m_settings(settings),
            m_force(force)
        { }
    };

    class MsgConfigureChannelizer : public Message {
        MESSAGE_CLASS_DECLARATION

    public:
        int getCenterFrequency() const { return m_centerFrequency; }

        static MsgConfigureChannelizer* create(int centerFrequency)
        {
            return new MsgConfigureChannelizer(centerFrequency);
        }

    private:
        int  m_centerFrequency;

        MsgConfigureChannelizer(int centerFrequency) :
            Message(),
            m_centerFrequency(centerFrequency)
        { }
    };

    class MsgConfigureImageFileName : public Message
    {
        MESSAGE_CLASS_DECLARATION

    public:
        const QString& getFileName() const { return m_fileName; }

        static MsgConfigureImageFileName* create(const QString& fileName)
        {
            return new MsgConfigureImageFileName(fileName);
        }

    private:
        QString m_fileName;

        MsgConfigureImageFileName(const QString& fileName) :
            Message(),
            m_fileName(fileName)
        { }
    };

    class MsgConfigureVideoFileName : public Message
    {
        MESSAGE_CLASS_DECLARATION

    public:
        const QString& getFileName() const { return m_fileName; }

        static MsgConfigureVideoFileName* create(const QString& fileName)
        {
            return new MsgConfigureVideoFileName(fileName);
        }

    private:
        QString m_fileName;

        MsgConfigureVideoFileName(const QString& fileName) :
            Message(),
            m_fileName(fileName)
        { }
    };

    class MsgConfigureVideoFileSourceSeek : public Message
    {
        MESSAGE_CLASS_DECLARATION

    public:
        int getPercentage() const { return m_seekPercentage; }

        static MsgConfigureVideoFileSourceSeek* create(int seekPercentage)
        {
            return new MsgConfigureVideoFileSourceSeek(seekPercentage);
        }

    protected:
        int m_seekPercentage; 

        MsgConfigureVideoFileSourceSeek(int seekPercentage) :
            Message(),
            m_seekPercentage(seekPercentage)
        { }
    };

    class MsgConfigureVideoFileSourceStreamTiming : public Message {
        MESSAGE_CLASS_DECLARATION

    public:

        static MsgConfigureVideoFileSourceStreamTiming* create()
        {
            return new MsgConfigureVideoFileSourceStreamTiming();
        }

    private:

        MsgConfigureVideoFileSourceStreamTiming() :
            Message()
        { }
    };

    class MsgReportVideoFileSourceStreamTiming : public Message
    {
        MESSAGE_CLASS_DECLARATION

    public:
        int getFrameCount() const { return m_frameCount; }

        static MsgReportVideoFileSourceStreamTiming* create(int frameCount)
        {
            return new MsgReportVideoFileSourceStreamTiming(frameCount);
        }

    protected:
        int m_frameCount;

        MsgReportVideoFileSourceStreamTiming(int frameCount) :
            Message(),
            m_frameCount(frameCount)
        { }
    };

    class MsgReportVideoFileSourceStreamData : public Message {
        MESSAGE_CLASS_DECLARATION

    public:
        int getFrameRate() const { return m_frameRate; }
        quint32 getVideoLength() const { return m_videoLength; }

        static MsgReportVideoFileSourceStreamData* create(int frameRate,
                quint32 recordLength)
        {
            return new MsgReportVideoFileSourceStreamData(frameRate, recordLength);
        }

    protected:
        int m_frameRate;
        int m_videoLength; 

        MsgReportVideoFileSourceStreamData(int frameRate,
                int videoLength) :
            Message(),
            m_frameRate(frameRate),
            m_videoLength(videoLength)
        { }
    };

    class MsgConfigureCameraIndex : public Message
    {
        MESSAGE_CLASS_DECLARATION

    public:
        int getIndex() const { return m_index; }

        static MsgConfigureCameraIndex* create(int index)
        {
            return new MsgConfigureCameraIndex(index);
        }

    private:
        int m_index;

        MsgConfigureCameraIndex(int index) :
            Message(),
            m_index(index)
        { }
    };

    class MsgConfigureCameraData : public Message
    {
        MESSAGE_CLASS_DECLARATION

    public:
        int getIndex() const { return m_index; }
        float getManualFPS() const { return m_manualFPS; }
        bool getManualFPSEnable() const { return m_manualFPSEnable; }

        static MsgConfigureCameraData* create(
                int index,
                float manualFPS,
                bool manualFPSEnable)
        {
            return new MsgConfigureCameraData(index, manualFPS, manualFPSEnable);
        }

    private:
        int m_index;
        float m_manualFPS;
        bool m_manualFPSEnable;

        MsgConfigureCameraData(int index, float manualFPS, bool manualFPSEnable) :
            Message(),
            m_index(index),
            m_manualFPS(manualFPS),
            m_manualFPSEnable(manualFPSEnable)
        { }
    };

    class MsgReportCameraData : public Message {
        MESSAGE_CLASS_DECLARATION

    public:
        int getdeviceNumber() const { return m_deviceNumber; }
        float getFPS() const { return m_fps; }
        float getFPSManual() const { return m_fpsManual; }
        bool getFPSManualEnable() const { return m_fpsManualEnable; }
        int getWidth() const { return m_width; }
        int getHeight() const { return m_height; }
        int getStatus() const { return m_status; }

        static MsgReportCameraData* create(
                int deviceNumber,
                float fps,
                float fpsManual,
                bool fpsManualEnable,
                int width,
                int height,
                int status)
        {
            return new MsgReportCameraData(
                    deviceNumber,
                    fps,
                    fpsManual,
                    fpsManualEnable,
                    width,
                    height,
                    status);
        }

    protected:
        int m_deviceNumber;
        float m_fps;
        float m_fpsManual;
        bool m_fpsManualEnable;
        int m_width;
        int m_height;
        int m_status;

        MsgReportCameraData(
                int deviceNumber,
                float fps,
                float fpsManual,
                bool fpsManualEnable,
                int width,
                int height,
                int status) :
            Message(),
            m_deviceNumber(deviceNumber),
            m_fps(fps),
            m_fpsManual(fpsManual),
            m_fpsManualEnable(fpsManualEnable),
            m_width(width),
            m_height(height),
            m_status(status)
        { }
    };

    class MsgReportEffectiveSampleRate : public Message
    {
        MESSAGE_CLASS_DECLARATION

    public:
        int getSampleRate() const { return m_sampleRate; }
        uint32_t gatNbPointsPerLine() const { return m_nbPointsPerLine; }

        static MsgReportEffectiveSampleRate* create(int sampleRate, uint32_t nbPointsPerLine)
        {
            return new MsgReportEffectiveSampleRate(sampleRate, nbPointsPerLine);
        }

    protected:
        int m_sampleRate;
        uint32_t m_nbPointsPerLine;

        MsgReportEffectiveSampleRate(
                int sampleRate,
                uint32_t nbPointsPerLine) :
            Message(),
            m_sampleRate(sampleRate),
            m_nbPointsPerLine(nbPointsPerLine)
        { }
    };

    ATVMod(DeviceAPI *deviceAPI);
    ~ATVMod();
    virtual void destroy() { delete this; }

    virtual void pull(Sample& sample);
    virtual void pullAudio(int nbSamples); // this is used for video signal actually
    virtual void start();
    virtual void stop();
    virtual bool handleMessage(const Message& cmd);

    virtual void getIdentifier(QString& id) { id = objectName(); }
    virtual void getTitle(QString& title) { title = m_settings.m_title; }
    virtual qint64 getCenterFrequency() const { return m_settings.m_inputFrequencyOffset; }

    virtual QByteArray serialize() const;
    virtual bool deserialize(const QByteArray& data);

    virtual int getNbSinkStreams() const { return 1; }
    virtual int getNbSourceStreams() const { return 0; }

    virtual qint64 getStreamCenterFrequency(int streamIndex, bool sinkElseSource) const
    {
        (void) streamIndex;
        (void) sinkElseSource;
        return m_settings.m_inputFrequencyOffset;
    }

    virtual int webapiSettingsGet(
                SWGSDRangel::SWGChannelSettings& response,
                QString& errorMessage);

    virtual int webapiSettingsPutPatch(
                bool force,
                const QStringList& channelSettingsKeys,
                SWGSDRangel::SWGChannelSettings& response,
                QString& errorMessage);

    virtual int webapiReportGet(
                SWGSDRangel::SWGChannelReport& response,
                QString& errorMessage);

    int getEffectiveSampleRate() const { return m_tvSampleRate; };
    double getMagSq() const { return m_movingAverage.asDouble(); }
    void getCameraNumbers(std::vector<int>& numbers);

    static void getBaseValues(int outputSampleRate, int linesPerSecond, int& sampleRateUnits, uint32_t& nbPointsPerRateUnit);
    static float getRFBandwidthDivisor(ATVModSettings::ATVModulation modulation);

    static const QString m_channelIdURI;
    static const QString m_channelId;

signals:
    void levelChanged(qreal rmsLevel, qreal peakLevel, int numSamples);

private slots:
    void networkManagerFinished(QNetworkReply *reply);

private:
    struct ATVCamera
    {
        cv::VideoCapture m_camera;    
        cv::Mat m_videoframeOriginal; 
        cv::Mat m_videoFrame;         
        int m_cameraNumber;           
        float m_videoFPS;             
        float m_videoFPSManual;       
        bool m_videoFPSManualEnable;  
        int m_videoWidth;             
        int m_videoHeight;            
        float m_videoFx;              
        float m_videoFy;              
        float m_videoFPSq;            
        float m_videoFPSqManual;      
        float m_videoFPSCount;        
        int m_videoPrevFPSCount;      

        ATVCamera() :
            m_cameraNumber(-1),
            m_videoFPS(25.0f),
            m_videoFPSManual(20.0f),
            m_videoFPSManualEnable(false),
            m_videoWidth(1),
            m_videoHeight(1),
            m_videoFx(1.0f),
            m_videoFy(1.0f),
            m_videoFPSq(1.0f),
            m_videoFPSqManual(1.0f),
            m_videoFPSCount(0.0f),
            m_videoPrevFPSCount(0)
        {}
    };

    DeviceAPI* m_deviceAPI;
    ThreadedBasebandSampleSource* m_threadedChannelizer;
    UpChannelizer* m_channelizer;

    int m_outputSampleRate;
    int m_inputFrequencyOffset;
    ATVModSettings m_settings;

    NCO m_carrierNco;
    Complex m_modSample;
    float m_modPhasor; 
    Interpolator m_interpolator;
    Real m_interpolatorDistance;
    Real m_interpolatorDistanceRemain;
    int      m_tvSampleRate;     
    uint32_t m_pointsPerLine;    
    int      m_pointsPerSync;    
    int      m_pointsPerBP;      
    int      m_pointsPerImgLine; 
    uint32_t m_pointsPerFP;      
    int      m_pointsPerFSync;   
    uint32_t m_pointsPerHBar;    
    uint32_t m_linesPerVBar;     
    uint32_t m_pointsPerTU;      
    int      m_nbLines;          
    int      m_nbLines2;         
    uint32_t m_nbImageLines;     
    uint32_t m_nbImageLines2;    
    int      m_nbHorizPoints;    
    int      m_nbSyncLinesHeadE; 
    int      m_nbSyncLinesHeadO; 
    int      m_nbSyncLinesBottom;
    int      m_nbLongSyncLines;  
    int      m_nbHalfLongSync;   
    int      m_nbWholeEqLines;   
    bool     m_singleLongSync;   
    int      m_nbBlankLines;     
    float    m_blankLineLvel;    
    float    m_hBarIncrement;    
    float    m_vBarIncrement;    
    bool     m_interleaved;      
    bool     m_evenImage;        
    QMutex   m_settingsMutex;
    int      m_horizontalCount;  
    int      m_lineCount;        
    float    m_fps;              

    MovingAverageUtil<double, double, 16> m_movingAverage;
    quint32 m_levelCalcCount;
    Real m_peakLevel;
    Real m_levelSum;

    cv::Mat m_imageFromFile;     
    cv::Mat m_imageOriginal;     
    cv::Mat m_image;             
    bool m_imageOK;

    cv::VideoCapture m_video;    
    cv::Mat m_videoframeOriginal; 
    cv::Mat m_videoFrame;        
    float m_videoFPS;            
    int m_videoWidth;            
    int m_videoHeight;           
    float m_videoFx;             
    float m_videoFy;             
    float m_videoFPSq;           
    float m_videoFPSCount;       
    int m_videoPrevFPSCount;     
    int m_videoLength;           
    bool m_videoEOF;             
    bool m_videoOK;

    std::vector<ATVCamera> m_cameras; 
    int m_cameraIndex;           

    std::string m_overlayText;
    QString m_imageFileName;
    QString m_videoFileName;

    // Used for standard SSB
    fftfilt* m_SSBFilter;
    Complex* m_SSBFilterBuffer;
    int m_SSBFilterBufferIndex;

    // Used for vestigial SSB with asymmetrical filtering (needs double sideband scheme)
    fftfilt* m_DSBFilter;
    Complex* m_DSBFilterBuffer;
    int m_DSBFilterBufferIndex;

    QNetworkAccessManager *m_networkManager;
    QNetworkRequest m_networkRequest;

    static const int m_ssbFftLen;
    static const float m_blackLevel;
    static const float m_spanLevel;
    static const int m_levelNbSamples;
    static const int m_nbBars; 
    static const int m_cameraFPSTestNbFrames; 

    void applyChannelSettings(int outputSampleRate, int inputFrequencyOffset, bool force = false);
    void applySettings(const ATVModSettings& settings, bool force = false);
    void pullFinalize(Complex& ci, Sample& sample);
    void pullVideo(Real& sample);
    void calculateLevel(Real& sample);
    void modulateSample();
    Complex& modulateSSB(Real& sample);
    Complex& modulateVestigialSSB(Real& sample);
    void applyStandard();
    void openImage(const QString& fileName);
    void openVideo(const QString& fileName);
    void resizeImage();
    void calculateVideoSizes();
    void resizeVideo();
    void seekVideoFileStream(int seekPercentage);
    void scanCameras();
    void releaseCameras();
    void calculateCamerasSizes();
    void resizeCameras();
    void resizeCamera();
    void mixImageAndText(cv::Mat& image);

    void webapiFormatChannelSettings(SWGSDRangel::SWGChannelSettings& response, const ATVModSettings& settings);
    void webapiFormatChannelReport(SWGSDRangel::SWGChannelReport& response);
    void webapiReverseSendSettings(QList<QString>& channelSettingsKeys, const ATVModSettings& settings, bool force);

    inline void pullImageLine(Real& sample, bool noHSync = false)
    {
        if (m_horizontalCount < m_pointsPerSync) // sync pulse
        {
            sample = noHSync ? m_blackLevel : 0.0f; // ultra-black
        }
        else if (m_horizontalCount < m_pointsPerSync + m_pointsPerBP) // back porch
        {
            sample = m_blackLevel; // black
        }
        else if (m_horizontalCount < m_pointsPerSync + m_pointsPerBP + m_pointsPerImgLine)
        {
            int pointIndex = m_horizontalCount - (m_pointsPerSync + m_pointsPerBP);
            int oddity = m_lineCount < m_nbLines2 + 1 ? 0 : 1;
            int iLine = oddity == 0 ? m_lineCount :  m_lineCount - m_nbLines2 - 1;
            int iLineImage = iLine - m_nbBlankLines - (oddity == 0 ? m_nbSyncLinesHeadE : m_nbSyncLinesHeadO);

            switch(m_settings.m_atvModInput)
            {
            case ATVModSettings::ATVModInputHBars:
                sample = (((float)pointIndex) / m_pointsPerHBar) * m_hBarIncrement + m_blackLevel;
                break;
            case ATVModSettings::ATVModInputVBars:
                sample = (((float)iLine) / m_linesPerVBar) * m_vBarIncrement + m_blackLevel;
                break;
            case ATVModSettings::ATVModInputChessboard:
                sample = (((iLine / m_linesPerVBar)*5 + (pointIndex / m_pointsPerHBar)) % 2) * m_spanLevel * m_settings.m_uniformLevel + m_blackLevel;
                break;
            case ATVModSettings::ATVModInputHGradient:
                sample = (pointIndex / (float) m_pointsPerImgLine) * m_spanLevel + m_blackLevel;
                break;
            case ATVModSettings::ATVModInputVGradient:
                sample = ((iLine -5) / (float) m_nbImageLines2) * m_spanLevel + m_blackLevel;
                break;
            case ATVModSettings::ATVModInputImage:
                if (!m_imageOK || (iLineImage < -oddity) || m_image.empty())
                {
                    sample = m_spanLevel * m_settings.m_uniformLevel + m_blackLevel;
                }
                else
                {
                    unsigned char pixv;

                    if (m_interleaved) {
                        pixv = m_image.at<unsigned char>(2*iLineImage + oddity, pointIndex); // row (y), col (x)
                    } else {
                        pixv = m_image.at<unsigned char>(iLineImage, pointIndex); // row (y), col (x)
                    }

                    sample = (pixv / 256.0f) * m_spanLevel + m_blackLevel;
                }
                break;
            case ATVModSettings::ATVModInputVideo:
                if (!m_videoOK || (iLineImage < -oddity) || m_videoFrame.empty())
                {
                    sample = m_spanLevel * m_settings.m_uniformLevel + m_blackLevel;
                }
                else
                {
                    unsigned char pixv;

                    if (m_interleaved) {
                        pixv = m_videoFrame.at<unsigned char>(2*iLineImage + oddity, pointIndex); // row (y), col (x)
                    } else {
                        pixv = m_videoFrame.at<unsigned char>(iLineImage, pointIndex); // row (y), col (x)
                    }

                    sample = (pixv / 256.0f) * m_spanLevel + m_blackLevel;
                }
                break;
            case ATVModSettings::ATVModInputCamera:
                if ((iLineImage < -oddity) || (m_cameraIndex < 0))
                {
                    sample = m_spanLevel * m_settings.m_uniformLevel + m_blackLevel;
                }
                else
                {
                    ATVCamera& camera = m_cameras[m_cameraIndex];

                    if (camera.m_videoFrame.empty())
                    {
                        sample = m_spanLevel * m_settings.m_uniformLevel + m_blackLevel;
                    }
                    else
                    {
                        unsigned char pixv;

                        if (m_interleaved) {
                            pixv = camera.m_videoFrame.at<unsigned char>(2*iLineImage + oddity, pointIndex); // row (y), col (x)
                        } else {
                            pixv = camera.m_videoFrame.at<unsigned char>(iLineImage, pointIndex); // row (y), col (x)
                        }

                        sample = (pixv / 256.0f) * m_spanLevel + m_blackLevel;
                    }
                }
                break;
            case ATVModSettings::ATVModInputUniform:
            default:
                sample = m_spanLevel * m_settings.m_uniformLevel + m_blackLevel;
            }
        }
        else // front porch
        {
            sample = m_blackLevel; // black
        }
    }

    inline void pullVSyncLineLongPulses(Real& sample)
    {
        int halfIndex = m_horizontalCount % (m_nbHorizPoints/2);

        if (halfIndex < (m_nbHorizPoints/2) - m_pointsPerSync) // ultra-black
        {
            sample = 0.0f;
        }
        else // black
        {
            if (m_singleLongSync && (m_horizontalCount < m_nbHorizPoints/2)) {
                sample = 0.0f;
            } else {
                sample = m_blackLevel;
            }
        }
    }

    inline void pullVSyncLineEqualizingPulses(Real& sample)
    {
        if (m_horizontalCount < m_pointsPerSync)
        {
            sample = 0.0f; // ultra-black
        }
        else if (m_horizontalCount < (m_nbHorizPoints/2))
        {
            sample = m_blackLevel; // black
        }
        else if (m_horizontalCount < (m_nbHorizPoints/2) + m_pointsPerFSync)
        {
            sample = 0.0f; // ultra-black
        }
        else
        {
            sample = m_blackLevel; // black
        }
    }

    inline void pullVSyncLineEqualizingThenLongPulses(Real& sample)
    {
        if (m_horizontalCount < m_pointsPerSync)
        {
            sample = 0.0f; // ultra-black
        }
        else if (m_horizontalCount < (m_nbHorizPoints/2))
        {
            sample = m_blackLevel; // black
        }
        else if (m_horizontalCount < m_nbHorizPoints - m_pointsPerSync)
        {
            sample = 0.0f; // ultra-black
        }
        else
        {
            sample = m_blackLevel; // black
        }
    }

    inline void pullVSyncLineLongThenEqualizingPulses(Real& sample)
    {
        if (m_horizontalCount < (m_nbHorizPoints/2) - m_pointsPerSync)
        {
            sample = 0.0f; // ultra-black
        }
        else if (m_horizontalCount < (m_nbHorizPoints/2))
        {
            sample = m_blackLevel; // black
        }
        else if (m_horizontalCount < (m_nbHorizPoints/2) + m_pointsPerFSync)
        {
            sample = 0.0f; // ultra-black
        }
        else
        {
            sample = m_blackLevel; // black
        }
    }

    inline void pullVSyncLine(Real& sample)
    {
        if (m_lineCount < m_nbLines2 + 1) // even
        {
            int fieldLine = m_lineCount;

            if (fieldLine < m_nbLongSyncLines) // 0,1: Whole line "long" pulses
            {
                pullVSyncLineLongPulses(sample);
            }
            else if (fieldLine < m_nbLongSyncLines + m_nbHalfLongSync) // long pulse then equalizing pulse
            {
                pullVSyncLineLongThenEqualizingPulses(sample);
            }
            else if (fieldLine < m_nbLongSyncLines + m_nbHalfLongSync + m_nbWholeEqLines) // Whole line equalizing pulses
            {
                pullVSyncLineEqualizingPulses(sample);
            }
            else if (fieldLine > m_nbLines2 - m_nbHalfLongSync) // equalizing pulse then long pulse
            {
                pullVSyncLineEqualizingThenLongPulses(sample);
            }
            else if (fieldLine > m_nbLines2 - m_nbHalfLongSync - m_nbWholeEqLines) // Whole line equalizing pulses
            {
                pullVSyncLineEqualizingPulses(sample);
            }
            else // black images
            {
                if (m_horizontalCount < m_pointsPerSync)
                {
                    sample = 0.0f;
                }
                else
                {
                    sample = m_blankLineLvel;
                }
            }
        }
        else // odd
        {
            int fieldLine = m_lineCount - m_nbLines2 - 1;

            if (fieldLine < m_nbLongSyncLines) // 0,1: Whole line "long" pulses
            {
                pullVSyncLineLongPulses(sample);
            }
            else if (fieldLine < m_nbLongSyncLines + m_nbWholeEqLines) // Whole line equalizing pulses
            {
                pullVSyncLineEqualizingPulses(sample);
            }
            else if (fieldLine > m_nbLines2 - 1 - m_nbWholeEqLines - m_nbHalfLongSync) // Whole line equalizing pulses
            {
                pullVSyncLineEqualizingPulses(sample);
            }
            else // black images
            {
                if (m_horizontalCount < m_pointsPerSync)
                {
                    sample = 0.0f;
                }
                else
                {
                    sample = m_blankLineLvel;
                }
            }
        }
    }
};


#endif /* PLUGINS_CHANNELTX_MODATV_ATVMOD_H_ */