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sdrangel/plugins/channelrx/demodatv/atvdemod.cpp

602 lines
18 KiB
C++

///////////////////////////////////////////////////////////////////////////////////
// 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/>. //
///////////////////////////////////////////////////////////////////////////////////
#include "atvdemod.h"
#include <QTime>
#include <QDebug>
#include <stdio.h>
#include <complex.h>
#include "audio/audiooutput.h"
#include "dsp/dspengine.h"
#include "dsp/pidcontroller.h"
MESSAGE_CLASS_DEFINITION(ATVDemod::MsgConfigureATVDemod, Message)
ATVDemod::ATVDemod() :
m_objSettingsMutex(QMutex::NonRecursive),
m_objRegisteredATVScreen(NULL),
m_intImageIndex(0),
m_intColIndex(0),
m_intRowIndex(0),
m_intSynchroPoints(0),
m_blnSynchroDetected(false),
m_blnLineSynchronized(false),
m_blnVerticalSynchroDetected(false),
m_fltLevelSynchroTop(0.0),
m_fltLevelSynchroBlack(1.0),
m_enmModulation(ATV_FM1),
m_intRowsLimit(0),
m_blnImageDetecting(false),
m_fltEffMin(2000000000.0f),
m_fltEffMax(-2000000000.0f),
m_fltAmpMin(-2000000000.0f),
m_fltAmpMax(2000000000.0f),
m_fltAmpDelta(1.0),
m_fltAmpLineAverage(0.0f),
m_intNumberSamplePerTop(0)
{
setObjectName("ATVDemod");
//*************** ATV PARAMETERS ***************
m_intNumberSamplePerLine=0;
m_intSynchroPoints=0;
m_intNumberOfLines=0;
m_blnInitialized=false;
m_intNumberOfRowsToDisplay=0;
memset((void*)m_fltBufferI,0,6*sizeof(float));
memset((void*)m_fltBufferQ,0,6*sizeof(float));
}
ATVDemod::~ATVDemod()
{
}
bool ATVDemod::SetATVScreen(ATVScreen *objScreen)
{
m_objRegisteredATVScreen = objScreen;
}
void ATVDemod::configure(MessageQueue* objMessageQueue, int intLineDurationUs, int intTopDurationUs, int intFramePerS, int intPercentOfRowsToDisplay, float fltVoltLevelSynchroTop, float fltVoltLevelSynchroBlack, ATVModulation enmModulation, bool blnHSync, bool blnVSync)
{
Message* msgCmd = MsgConfigureATVDemod::create(intLineDurationUs, intTopDurationUs, intFramePerS, intPercentOfRowsToDisplay, fltVoltLevelSynchroTop, fltVoltLevelSynchroBlack, enmModulation,blnHSync,blnVSync);
objMessageQueue->push(msgCmd);
}
void ATVDemod::InitATVParameters(int intMsps, int intLineDurationUs, int intTopDurationUs, int intFramePerS, int intPercentOfRowsToDisplay, float fltVoltLevelSynchroTop, float fltVoltLevelSynchroBlack, ATVModulation enmModulation, bool blnHSync, bool blnVSync)
{
float fltSecondToUs = 1000000.0f;
float fltSampling=(float) intMsps;
float fltLineTimeUs=((float) intLineDurationUs)/10.0f;
float fltLineSynchroTop=(float) intTopDurationUs;
float fltImagesPerSeconds=(float) intFramePerS;
int intNumberSamplePerLine;
int intNumberOfLines;
bool blnNewOpenGLScreen=false;
m_blnInitialized=false;
m_objSettingsMutex.lock();
if(m_objRegisteredATVScreen==NULL)
{
m_intNumberSamplePerLine=0;
m_intNumberSamplePerTop=0;
m_intNumberOfLines=0;
m_fltLevelSynchroTop=0.0;
m_fltLevelSynchroBlack=1.0;
m_blnInitialized=false;
m_objSettingsMutex.unlock();
return;
}
m_fltLevelSynchroTop = fltVoltLevelSynchroTop;
m_fltLevelSynchroBlack = fltVoltLevelSynchroBlack;
intNumberSamplePerLine=(int)((fltLineTimeUs*fltSampling)/fltSecondToUs);
intNumberOfLines=(int)((fltSecondToUs/fltImagesPerSeconds)/round(fltLineTimeUs));
if((intNumberSamplePerLine!=m_intNumberSamplePerLine)
|| (intNumberOfLines!=m_intNumberOfLines))
{
blnNewOpenGLScreen=true;
}
m_intNumberSamplePerLine= intNumberSamplePerLine;
m_intNumberSamplePerTop=(int)((fltLineSynchroTop*fltSampling)/fltSecondToUs);
m_intNumberOfLines = intNumberOfLines;
m_intNumberOfRowsToDisplay = (int)((((float)intPercentOfRowsToDisplay)*fltLineTimeUs*fltSampling)/(fltSecondToUs*100.0f));
m_intRowsLimit = m_intNumberOfLines-1;
m_intImageIndex = 0;
m_enmModulation = enmModulation;
m_intColIndex=0;
m_intRowIndex=0;
m_intRowsLimit=0;
if(blnNewOpenGLScreen)
{
m_objRegisteredATVScreen->resizeATVScreen(m_intNumberSamplePerLine,m_intNumberOfLines);
}
//Mise à jour de la config
m_objRunning.m_enmModulation = m_enmModulation;
m_objRunning.m_fltVoltLevelSynchroBlack = m_fltLevelSynchroBlack;
m_objRunning.m_fltVoltLevelSynchroTop = m_fltLevelSynchroTop;
m_objRunning.m_intFramePerS = intFramePerS;
m_objRunning.m_intLineDurationUs = intLineDurationUs;
m_objRunning.m_intTopDurationUs = intTopDurationUs;
m_objRunning.m_intMsps = intMsps;
m_objRunning.m_intPercentOfRowsToDisplay = intPercentOfRowsToDisplay;
m_objRunning.m_blnHSync = blnHSync;
m_objRunning.m_blnVSync = blnVSync;
qDebug() << "ATVDemod::InitATVParameters:"
<< " - Msps: " << intMsps
<< " - Line us: " << intLineDurationUs
<< " - Top us: " << intTopDurationUs
<< " - Frame/s: " << intFramePerS
<< " <=> "
<< " - Samples per Line: " << m_intNumberSamplePerLine
<< " - Samples per Top: " << m_intNumberSamplePerTop
<< " - Lines per Frame: " << m_intNumberOfLines
<< " - Rows to Display: " << m_intNumberOfRowsToDisplay
<< " - Modulation: " << ((m_enmModulation==ATV_AM)?"AM" : "FM");
m_objSettingsMutex.unlock();
m_blnInitialized=true;
}
void ATVDemod::feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end, bool firstOfBurst)
{
float fltDivSynchroBlack=1.0f-m_fltLevelSynchroBlack;
float fltI;
float fltQ;
float fltNormI;
float fltNormQ;
float fltNorm=0.00f;
float fltVal;
int intVal;
qint16 * ptrBufferToRelease=NULL;
bool blnComputeImage=false;
int intSynchroTimeSamples= (3*m_intNumberSamplePerLine)/4;
float fltSynchroTrameLevel = 0.5f*((float)intSynchroTimeSamples)*m_fltLevelSynchroBlack;
//********** Let's rock and roll buddy ! **********
m_objSettingsMutex.lock();
//********** Accessing ATV Screen context **********
if(m_intImageIndex==0)
{
if(m_intNumberOfLines%2==1)
{
m_intRowsLimit = m_intNumberOfLines;
}
else
{
m_intRowsLimit = m_intNumberOfLines-2;
}
}
#ifdef EXTENDED_DIRECT_SAMPLE
qint16 * ptrBuffer;
qint32 intLen;
//********** Reading direct samples **********
SampleVector::const_iterator it = begin;
intLen = it->intLen;
ptrBuffer = it->ptrBuffer;
ptrBufferToRelease = ptrBuffer;
++it;
for(qint32 intInd=0; intInd<intLen-1; intInd +=2)
{
fltI= ((qint32) (*ptrBuffer)) << 4;
ptrBuffer ++;
fltQ= ((qint32) (*ptrBuffer)) << 4;
ptrBuffer ++;
#else
for (SampleVector::const_iterator it = begin; it != end; ++it /* ++it **/)
{
fltI = it->real();
fltQ = it->imag();
#endif
//********** demodulation **********
fltNorm = sqrt(fltI*fltI + fltQ*fltQ);
if(m_enmModulation!=ATV_AM)
{
//Amplitude FM
fltNormI= fltI/fltNorm;
fltNormQ= fltQ/fltNorm;
//-2 > 2 : 0 -> 1 volt
//0->0.3 synchro 0.3->1 image
if(m_enmModulation==ATV_FM1)
{
//YDiff Cd
fltVal = m_fltBufferI[0]*(fltNormQ - m_fltBufferQ[1]);
fltVal -= m_fltBufferQ[0]*(fltNormI - m_fltBufferI[1]);
fltVal += 2.0f;
fltVal /=4.0f;
}
else
{
//YDiff Folded
fltVal = m_fltBufferI[2]*((m_fltBufferQ[5]-fltNormQ)/16.0f + m_fltBufferQ[1] - m_fltBufferQ[3]);
fltVal -= m_fltBufferQ[2]*((m_fltBufferI[5]-fltNormI)/16.0f + m_fltBufferI[1] - m_fltBufferI[3]);
fltVal += 2.125f;
fltVal /=4.25f;
m_fltBufferI[5]=m_fltBufferI[4];
m_fltBufferQ[5]=m_fltBufferQ[4];
m_fltBufferI[4]=m_fltBufferI[3];
m_fltBufferQ[4]=m_fltBufferQ[3];
m_fltBufferI[3]=m_fltBufferI[2];
m_fltBufferQ[3]=m_fltBufferQ[2];
m_fltBufferI[2]=m_fltBufferI[1];
m_fltBufferQ[2]=m_fltBufferQ[1];
}
m_fltBufferI[1]=m_fltBufferI[0];
m_fltBufferQ[1]=m_fltBufferQ[0];
m_fltBufferI[0]=fltNormI;
m_fltBufferQ[0]=fltNormQ;
}
else
{
//Amplitude AM
fltVal = fltNorm;
//********** Mini and Maxi Amplitude tracking **********
if(fltVal<m_fltEffMin)
{
m_fltEffMin=fltVal;
}
if(fltVal>m_fltEffMax)
{
m_fltEffMax=fltVal;
}
//Normalisation
fltVal -= m_fltAmpMin;
fltVal /=m_fltAmpDelta;
}
m_fltAmpLineAverage += fltVal;
//********** gray level **********
//-0.3 -> 0.7
intVal = (int) 255.0*(fltVal-m_fltLevelSynchroBlack)/fltDivSynchroBlack;
//0 -> 255
if(intVal<0)
{
intVal=0;
}
else if(intVal>255)
{
intVal=255;
}
//********** Filling pixels **********
blnComputeImage=m_blnInitialized;
if(m_blnInitialized==true)
{
blnComputeImage=(m_objRunning.m_intPercentOfRowsToDisplay!=50);
if(!blnComputeImage)
{
blnComputeImage=((m_intImageIndex/2)%2==0);
}
}
if(blnComputeImage)
{
m_objRegisteredATVScreen->setDataColor(m_intColIndex,intVal, intVal, intVal);
}
m_intColIndex++;
//////////////////////
m_blnSynchroDetected=false;
if((m_objRunning.m_blnHSync) && (m_intRowIndex>1))
{
//********** Line Synchro 0-0-0 -> 0.3-0.3 0.3 **********
if(m_blnImageDetecting==false)
{
//Floor Detection 0
if(fltVal<=m_fltLevelSynchroTop)
{
m_intSynchroPoints ++;
}
else
{
m_intSynchroPoints=0;
}
if(m_intSynchroPoints>=m_intNumberSamplePerTop)
{
m_blnSynchroDetected=true;
m_blnImageDetecting=true;
m_intSynchroPoints=0;
}
}
else
{
//Image detection Sub Black 0.3
if(fltVal>=m_fltLevelSynchroBlack)
{
m_intSynchroPoints ++;
}
else
{
m_intSynchroPoints=0;
}
if(m_intSynchroPoints>=m_intNumberSamplePerTop)
{
m_blnSynchroDetected=false;
m_blnImageDetecting=false;
m_intSynchroPoints=0;
}
}
}
//********** Rendering if necessary **********
// Vertical Synchro : 3/4 a line necessary
if(!m_blnVerticalSynchroDetected && m_objRunning.m_blnVSync)
{
if(m_intColIndex>=intSynchroTimeSamples)
{
if(m_fltAmpLineAverage<=fltSynchroTrameLevel) //(m_fltLevelSynchroBlack*(float)(m_intColIndex-((m_intNumberSamplePerLine*12)/64)))) //75
{
m_blnVerticalSynchroDetected=true;
m_intRowIndex=m_intImageIndex%2;
if(blnComputeImage)
{
m_objRegisteredATVScreen->selectRow(m_intRowIndex);
}
}
}
}
//Horizontal Synchro
if((m_intColIndex>=m_intNumberSamplePerLine)
|| (m_blnSynchroDetected==true))
{
m_blnSynchroDetected=false;
m_blnImageDetecting=true;
m_intColIndex=0;
if((m_blnSynchroDetected==false) || (m_blnLineSynchronized==true))
{
//New line + Interleaving
m_intRowIndex ++;
m_intRowIndex ++;
if(m_intRowIndex<m_intNumberOfLines)
{
m_objRegisteredATVScreen->selectRow(m_intRowIndex);
}
m_blnLineSynchronized=false;
}
else
{
m_blnLineSynchronized=m_blnSynchroDetected;
}
m_fltAmpLineAverage=0.0f;
}
//////////////////////
if(m_intRowIndex>=m_intRowsLimit)
{
m_blnVerticalSynchroDetected=false;
m_fltAmpLineAverage=0.0f;
//Interleave Odd/Even images
m_intRowIndex=m_intImageIndex%2;
m_intColIndex=0;
if(blnComputeImage)
{
m_objRegisteredATVScreen->selectRow(m_intRowIndex);
}
//Rendering when odd image processed
if(m_intImageIndex%2==1)
{
//interleave
if(blnComputeImage)
{
m_objRegisteredATVScreen->renderImage(NULL);
}
m_intRowsLimit = m_intNumberOfLines-1;
if(m_objRunning.m_enmModulation==ATV_AM)
{
m_fltAmpMin=m_fltEffMin;
m_fltAmpMax=m_fltEffMax;
m_fltAmpDelta=m_fltEffMax-m_fltEffMin;
if(m_fltAmpDelta<=0.0)
{
m_fltAmpDelta=1.0f;
}
//Reset extrema
m_fltEffMin=2000000.0f;
m_fltEffMax=-2000000.0f;
}
}
else
{
if(m_intNumberOfLines%2==1)
{
m_intRowsLimit = m_intNumberOfLines;
}
else
{
m_intRowsLimit = m_intNumberOfLines-2;
}
}
m_intImageIndex ++;
}
//////////////////////
}
if(ptrBufferToRelease!=NULL)
{
delete ptrBufferToRelease;
}
m_objSettingsMutex.unlock();
}
void ATVDemod::start()
{
//m_objTimer.start();
}
void ATVDemod::stop()
{
}
bool ATVDemod::handleMessage(const Message& cmd)
{
qDebug() << "ATVDemod::handleMessage";
if (DownChannelizer::MsgChannelizerNotification::match(cmd))
{
DownChannelizer::MsgChannelizerNotification& objNotif = (DownChannelizer::MsgChannelizerNotification&) cmd;
if(m_objRunning.m_intMsps!=objNotif.getSampleRate())
{
m_objRunning.m_intMsps = objNotif.getSampleRate();
ApplySettings();
}
qDebug() << "ATVDemod::handleMessage: MsgChannelizerNotification:"
<< " m_intMsps: " << m_objRunning.m_intMsps;
return true;
}
else if (MsgConfigureATVDemod::match(cmd))
{
MsgConfigureATVDemod& objCfg = (MsgConfigureATVDemod&) cmd;
if((objCfg.m_objMsgConfig.m_enmModulation != m_objRunning.m_enmModulation)
|| (objCfg.m_objMsgConfig.m_fltVoltLevelSynchroBlack != m_objRunning.m_fltVoltLevelSynchroBlack)
|| (objCfg.m_objMsgConfig.m_fltVoltLevelSynchroTop != m_objRunning.m_fltVoltLevelSynchroTop)
|| (objCfg.m_objMsgConfig.m_intFramePerS != m_objRunning.m_intFramePerS)
|| (objCfg.m_objMsgConfig.m_intLineDurationUs != m_objRunning.m_intLineDurationUs)
|| (objCfg.m_objMsgConfig.m_intPercentOfRowsToDisplay != m_objRunning.m_intPercentOfRowsToDisplay)
|| (objCfg.m_objMsgConfig.m_intTopDurationUs != m_objRunning.m_intTopDurationUs)
|| (objCfg.m_objMsgConfig.m_blnHSync != m_objRunning.m_blnHSync)
|| (objCfg.m_objMsgConfig.m_blnVSync != m_objRunning.m_blnVSync))
{
m_objRunning.m_enmModulation = objCfg.m_objMsgConfig.m_enmModulation;
m_objRunning.m_fltVoltLevelSynchroBlack = objCfg.m_objMsgConfig.m_fltVoltLevelSynchroBlack;
m_objRunning.m_fltVoltLevelSynchroTop = objCfg.m_objMsgConfig.m_fltVoltLevelSynchroTop;
m_objRunning.m_intFramePerS = objCfg.m_objMsgConfig.m_intFramePerS;
m_objRunning.m_intLineDurationUs = objCfg.m_objMsgConfig.m_intLineDurationUs;
m_objRunning.m_intPercentOfRowsToDisplay = objCfg.m_objMsgConfig.m_intPercentOfRowsToDisplay;
m_objRunning.m_intTopDurationUs = objCfg.m_objMsgConfig.m_intTopDurationUs;
m_objRunning.m_blnHSync = objCfg.m_objMsgConfig.m_blnHSync;
m_objRunning.m_blnVSync = objCfg.m_objMsgConfig.m_blnVSync;
ApplySettings();
}
return true;
}
else
{
return false;
}
}
void ATVDemod::ApplySettings()
{
if(m_objRunning.m_intMsps==0)
{
return;
}
InitATVParameters(m_objRunning.m_intMsps,m_objRunning.m_intLineDurationUs,m_objRunning.m_intTopDurationUs,m_objRunning.m_intFramePerS,m_objRunning.m_intPercentOfRowsToDisplay,m_objRunning.m_fltVoltLevelSynchroTop,m_objRunning.m_fltVoltLevelSynchroBlack,m_objRunning.m_enmModulation,m_objRunning.m_blnHSync, m_objRunning.m_blnVSync);
}
int ATVDemod::GetSampleRate()
{
return m_objRunning.m_intMsps;
}