mirror of
https://github.com/f4exb/sdrangel.git
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615 lines
19 KiB
C++
615 lines
19 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2017 F4HKW //
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// for F4EXB / SDRAngel //
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// //
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// This program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation as version 3 of the License, or //
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// //
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// This program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License V3 for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#include "atvdemod.h"
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#include <QTime>
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#include <QDebug>
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#include <stdio.h>
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#include <complex.h>
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#include "audio/audiooutput.h"
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#include "dsp/dspengine.h"
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#include "dsp/pidcontroller.h"
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MESSAGE_CLASS_DEFINITION(ATVDemod::MsgConfigureATVDemod, Message)
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const float ATVDemod::m_fltSecondToUs = 1000000.0f;
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ATVDemod::ATVDemod() :
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m_objSettingsMutex(QMutex::NonRecursive),
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m_objRegisteredATVScreen(NULL),
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m_intImageIndex(0),
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m_intColIndex(0),
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m_intRowIndex(0),
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m_intSynchroPoints(0),
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m_blnSynchroDetected(false),
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m_blnLineSynchronized(false),
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m_blnVerticalSynchroDetected(false),
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m_fltVoltLevelSynchroTop(0.0),
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m_fltVoltLevelSynchroBlack(1.0),
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m_enmModulation(ATV_FM1),
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m_intRowsLimit(0),
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m_blnImageDetecting(false),
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m_fltEffMin(2000000000.0f),
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m_fltEffMax(-2000000000.0f),
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m_fltAmpMin(-2000000000.0f),
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m_fltAmpMax(2000000000.0f),
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m_fltAmpDelta(1.0),
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m_fltAmpLineAverage(0.0f),
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m_intNumberSamplePerTop(0)
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{
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setObjectName("ATVDemod");
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//*************** ATV PARAMETERS ***************
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m_intNumberSamplePerLine=0;
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m_intSynchroPoints=0;
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m_intNumberOfLines=0;
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m_intNumberOfRowsToDisplay=0;
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m_objMagSqAverage.resize(16, 1.0);
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memset((void*)m_fltBufferI,0,6*sizeof(float));
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memset((void*)m_fltBufferQ,0,6*sizeof(float));
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}
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ATVDemod::~ATVDemod()
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{
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}
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bool ATVDemod::SetATVScreen(ATVScreen *objScreen)
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{
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m_objRegisteredATVScreen = objScreen;
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}
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void ATVDemod::configure(MessageQueue* objMessageQueue, int intLineDurationUs, int intTopDurationUs, int intFramePerS, int intPercentOfRowsToDisplay, float fltVoltLevelSynchroTop, float fltVoltLevelSynchroBlack, ATVModulation enmModulation, bool blnHSync, bool blnVSync)
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{
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Message* msgCmd = MsgConfigureATVDemod::create(intLineDurationUs, intTopDurationUs, intFramePerS, intPercentOfRowsToDisplay, fltVoltLevelSynchroTop, fltVoltLevelSynchroBlack, enmModulation,blnHSync,blnVSync);
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objMessageQueue->push(msgCmd);
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}
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void ATVDemod::InitATVParameters(
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int intSampleRate,
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float fltLineDurationUs,
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float fltTopDurationUs,
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int intFramePerS,
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int intPercentOfRowsToDisplay,
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float fltVoltLevelSynchroTop,
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float fltVoltLevelSynchroBlack,
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ATVModulation enmModulation,
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bool blnHSync,
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bool blnVSync)
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{
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float fltImagesPerSeconds = (float) intFramePerS;
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int intNumberSamplePerLine;
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int intNumberOfLines;
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bool blnNewOpenGLScreen = false;
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m_objSettingsMutex.lock();
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m_fltVoltLevelSynchroTop = fltVoltLevelSynchroTop;
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m_fltVoltLevelSynchroBlack = fltVoltLevelSynchroBlack;
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intNumberSamplePerLine = (int) ((fltLineDurationUs * intSampleRate) / m_fltSecondToUs);
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intNumberOfLines = (int) ((m_fltSecondToUs/fltImagesPerSeconds) /round(fltLineDurationUs));
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if((intNumberSamplePerLine != m_intNumberSamplePerLine)
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|| (intNumberOfLines != m_intNumberOfLines))
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{
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blnNewOpenGLScreen = true;
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}
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m_intNumberSamplePerLine= intNumberSamplePerLine;
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m_intNumberSamplePerTop=(int)((fltTopDurationUs * intSampleRate) / m_fltSecondToUs);
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m_intNumberOfLines = intNumberOfLines;
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m_intNumberOfRowsToDisplay = (int)((((float)intPercentOfRowsToDisplay) * fltLineDurationUs * intSampleRate) / (m_fltSecondToUs*100.0f));
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m_intRowsLimit = m_intNumberOfLines-1;
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m_intImageIndex = 0;
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m_enmModulation = enmModulation;
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m_intColIndex=0;
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m_intRowIndex=0;
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m_intRowsLimit=0;
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if(blnNewOpenGLScreen)
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{
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m_objRegisteredATVScreen->resizeATVScreen(m_intNumberSamplePerLine, m_intNumberOfLines);
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}
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//Mise à jour de la config
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m_objRunning.m_enmModulation = m_enmModulation;
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m_objRunning.m_fltVoltLevelSynchroBlack = m_fltVoltLevelSynchroBlack;
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m_objRunning.m_fltVoltLevelSynchroTop = m_fltVoltLevelSynchroTop;
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m_objRunning.m_intFramePerS = intFramePerS;
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m_objRunning.m_fltLineDurationUs = fltLineDurationUs;
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m_objRunning.m_fltTopDurationUs = fltTopDurationUs;
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m_objRunning.m_intSampleRate = intSampleRate;
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m_objRunning.m_intPercentOfRowsToDisplay = intPercentOfRowsToDisplay;
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m_objRunning.m_blnHSync = blnHSync;
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m_objRunning.m_blnVSync = blnVSync;
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m_objSettingsMutex.unlock();
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qDebug() << "ATVDemod::InitATVParameters:"
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<< " - Sample rate S/s: " << intSampleRate
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<< " - Line us: " << fltLineDurationUs
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<< " - Top us: " << fltTopDurationUs
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<< " - Frame/s: " << intFramePerS
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<< " <=> "
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<< " - Samples per Line: " << m_intNumberSamplePerLine
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<< " - Samples per Top: " << m_intNumberSamplePerTop
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<< " - Lines per Frame: " << m_intNumberOfLines
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<< " - Rows to Display: " << m_intNumberOfRowsToDisplay
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<< " - Modulation: " << ((m_enmModulation==ATV_AM)?"AM" : "FM");
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}
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void ATVDemod::feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end, bool firstOfBurst)
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{
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float fltDivSynchroBlack=1.0f-m_fltVoltLevelSynchroBlack;
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float fltI;
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float fltQ;
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float fltNormI;
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float fltNormQ;
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float fltNorm=0.00f;
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float fltVal;
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int intVal;
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qint16 * ptrBufferToRelease=NULL;
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bool blnComputeImage=false;
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int intSynchroTimeSamples= (3*m_intNumberSamplePerLine)/4;
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float fltSynchroTrameLevel = 0.5f*((float)intSynchroTimeSamples)*m_fltVoltLevelSynchroBlack;
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//********** Let's rock and roll buddy ! **********
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m_objSettingsMutex.lock();
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//********** Accessing ATV Screen context **********
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if(m_intImageIndex==0)
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{
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if(m_intNumberOfLines%2==1)
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{
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m_intRowsLimit = m_intNumberOfLines;
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}
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else
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{
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m_intRowsLimit = m_intNumberOfLines-2;
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}
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}
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#ifdef EXTENDED_DIRECT_SAMPLE
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qint16 * ptrBuffer;
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qint32 intLen;
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//********** Reading direct samples **********
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SampleVector::const_iterator it = begin;
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intLen = it->intLen;
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ptrBuffer = it->ptrBuffer;
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ptrBufferToRelease = ptrBuffer;
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++it;
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for(qint32 intInd=0; intInd<intLen-1; intInd +=2)
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{
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fltI= ((qint32) (*ptrBuffer)) << 4;
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ptrBuffer ++;
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fltQ= ((qint32) (*ptrBuffer)) << 4;
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ptrBuffer ++;
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#else
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for (SampleVector::const_iterator it = begin; it != end; ++it /* ++it **/)
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{
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fltI = it->real();
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fltQ = it->imag();
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#endif
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//********** demodulation **********
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double magSq = fltI*fltI + fltQ*fltQ;
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m_objMagSqAverage.feed(magSq);
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fltNorm = sqrt(magSq);
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if ((m_enmModulation == ATV_FM1) || (m_enmModulation == ATV_FM2))
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{
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//Amplitude FM
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fltNormI= fltI/fltNorm;
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fltNormQ= fltQ/fltNorm;
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//-2 > 2 : 0 -> 1 volt
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//0->0.3 synchro 0.3->1 image
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if(m_enmModulation==ATV_FM1)
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{
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//YDiff Cd
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fltVal = m_fltBufferI[0]*(fltNormQ - m_fltBufferQ[1]);
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fltVal -= m_fltBufferQ[0]*(fltNormI - m_fltBufferI[1]);
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fltVal += 2.0f;
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fltVal /=4.0f;
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}
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else
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{
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//YDiff Folded
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fltVal = m_fltBufferI[2]*((m_fltBufferQ[5]-fltNormQ)/16.0f + m_fltBufferQ[1] - m_fltBufferQ[3]);
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fltVal -= m_fltBufferQ[2]*((m_fltBufferI[5]-fltNormI)/16.0f + m_fltBufferI[1] - m_fltBufferI[3]);
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fltVal += 2.125f;
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fltVal /=4.25f;
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m_fltBufferI[5]=m_fltBufferI[4];
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m_fltBufferQ[5]=m_fltBufferQ[4];
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m_fltBufferI[4]=m_fltBufferI[3];
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m_fltBufferQ[4]=m_fltBufferQ[3];
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m_fltBufferI[3]=m_fltBufferI[2];
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m_fltBufferQ[3]=m_fltBufferQ[2];
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m_fltBufferI[2]=m_fltBufferI[1];
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m_fltBufferQ[2]=m_fltBufferQ[1];
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}
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m_fltBufferI[1]=m_fltBufferI[0];
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m_fltBufferQ[1]=m_fltBufferQ[0];
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m_fltBufferI[0]=fltNormI;
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m_fltBufferQ[0]=fltNormQ;
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}
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else if (m_enmModulation == ATV_AM)
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{
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//Amplitude AM
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fltVal = fltNorm;
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//********** Mini and Maxi Amplitude tracking **********
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if(fltVal<m_fltEffMin)
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{
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m_fltEffMin=fltVal;
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}
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if(fltVal>m_fltEffMax)
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{
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m_fltEffMax=fltVal;
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}
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//Normalisation
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fltVal -= m_fltAmpMin;
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fltVal /=m_fltAmpDelta;
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}
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else
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{
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fltVal = 0.0f;
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}
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m_fltAmpLineAverage += fltVal;
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//********** gray level **********
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//-0.3 -> 0.7
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intVal = (int) 255.0*(fltVal-m_fltVoltLevelSynchroBlack)/fltDivSynchroBlack;
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//0 -> 255
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if(intVal<0)
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{
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intVal=0;
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}
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else if(intVal>255)
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{
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intVal=255;
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}
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//********** Filling pixels **********
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blnComputeImage=(m_objRunning.m_intPercentOfRowsToDisplay!=50);
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if (!blnComputeImage)
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{
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blnComputeImage=((m_intImageIndex/2)%2==0);
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}
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if (blnComputeImage)
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{
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m_objRegisteredATVScreen->setDataColor(m_intColIndex,intVal, intVal, intVal);
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}
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m_intColIndex++;
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//////////////////////
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m_blnSynchroDetected=false;
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if((m_objRunning.m_blnHSync) && (m_intRowIndex>1))
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{
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//********** Line Synchro 0-0-0 -> 0.3-0.3 0.3 **********
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if(m_blnImageDetecting==false)
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{
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//Floor Detection 0
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if(fltVal<=m_fltVoltLevelSynchroTop)
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{
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m_intSynchroPoints ++;
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}
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else
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{
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m_intSynchroPoints=0;
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}
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if(m_intSynchroPoints>=m_intNumberSamplePerTop)
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{
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m_blnSynchroDetected=true;
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m_blnImageDetecting=true;
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m_intSynchroPoints=0;
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}
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}
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else
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{
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//Image detection Sub Black 0.3
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if(fltVal>=m_fltVoltLevelSynchroBlack)
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{
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m_intSynchroPoints ++;
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}
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else
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{
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m_intSynchroPoints=0;
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}
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if(m_intSynchroPoints>=m_intNumberSamplePerTop)
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{
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m_blnSynchroDetected=false;
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m_blnImageDetecting=false;
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m_intSynchroPoints=0;
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}
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}
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}
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//********** Rendering if necessary **********
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// Vertical Synchro : 3/4 a line necessary
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if(!m_blnVerticalSynchroDetected && m_objRunning.m_blnVSync)
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{
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if(m_intColIndex>=intSynchroTimeSamples)
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{
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if(m_fltAmpLineAverage<=fltSynchroTrameLevel) //(m_fltLevelSynchroBlack*(float)(m_intColIndex-((m_intNumberSamplePerLine*12)/64)))) //75
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{
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m_blnVerticalSynchroDetected=true;
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m_intRowIndex=m_intImageIndex%2;
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if(blnComputeImage)
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{
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m_objRegisteredATVScreen->selectRow(m_intRowIndex);
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}
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}
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}
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}
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//Horizontal Synchro
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if((m_intColIndex>=m_intNumberSamplePerLine)
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|| (m_blnSynchroDetected==true))
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{
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m_blnSynchroDetected=false;
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m_blnImageDetecting=true;
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m_intColIndex=0;
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if((m_blnSynchroDetected==false) || (m_blnLineSynchronized==true))
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{
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//New line + Interleaving
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m_intRowIndex ++;
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m_intRowIndex ++;
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if(m_intRowIndex<m_intNumberOfLines)
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{
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m_objRegisteredATVScreen->selectRow(m_intRowIndex);
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}
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m_blnLineSynchronized=false;
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}
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else
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{
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m_blnLineSynchronized=m_blnSynchroDetected;
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}
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m_fltAmpLineAverage=0.0f;
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}
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//////////////////////
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if(m_intRowIndex>=m_intRowsLimit)
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{
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m_blnVerticalSynchroDetected=false;
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m_fltAmpLineAverage=0.0f;
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//Interleave Odd/Even images
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m_intRowIndex=m_intImageIndex%2;
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m_intColIndex=0;
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if(blnComputeImage)
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{
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m_objRegisteredATVScreen->selectRow(m_intRowIndex);
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}
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//Rendering when odd image processed
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if(m_intImageIndex%2==1)
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{
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//interleave
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if(blnComputeImage)
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{
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m_objRegisteredATVScreen->renderImage(NULL);
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}
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m_intRowsLimit = m_intNumberOfLines-1;
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if(m_objRunning.m_enmModulation==ATV_AM)
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{
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m_fltAmpMin=m_fltEffMin;
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m_fltAmpMax=m_fltEffMax;
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m_fltAmpDelta=m_fltEffMax-m_fltEffMin;
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if(m_fltAmpDelta<=0.0)
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{
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m_fltAmpDelta=1.0f;
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}
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//Reset extrema
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m_fltEffMin=2000000.0f;
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m_fltEffMax=-2000000.0f;
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}
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}
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else
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{
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if(m_intNumberOfLines%2==1)
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{
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m_intRowsLimit = m_intNumberOfLines;
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}
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else
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{
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m_intRowsLimit = m_intNumberOfLines-2;
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}
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}
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m_intImageIndex ++;
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}
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//////////////////////
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}
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if(ptrBufferToRelease!=NULL)
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{
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delete ptrBufferToRelease;
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}
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m_objSettingsMutex.unlock();
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}
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void ATVDemod::start()
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{
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//m_objTimer.start();
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}
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void ATVDemod::stop()
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{
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}
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bool ATVDemod::handleMessage(const Message& cmd)
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{
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qDebug() << "ATVDemod::handleMessage";
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|
|
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if (DownChannelizer::MsgChannelizerNotification::match(cmd))
|
|
{
|
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DownChannelizer::MsgChannelizerNotification& objNotif = (DownChannelizer::MsgChannelizerNotification&) cmd;
|
|
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if(m_objRunning.m_intSampleRate!=objNotif.getSampleRate())
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|
{
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|
m_objRunning.m_intSampleRate = objNotif.getSampleRate();
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ApplySettings();
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|
}
|
|
|
|
qDebug() << "ATVDemod::handleMessage: MsgChannelizerNotification:"
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<< " m_intMsps: " << m_objRunning.m_intSampleRate;
|
|
|
|
return true;
|
|
}
|
|
else if (MsgConfigureATVDemod::match(cmd))
|
|
{
|
|
MsgConfigureATVDemod& objCfg = (MsgConfigureATVDemod&) cmd;
|
|
|
|
m_objConfig.m_enmModulation = objCfg.m_objMsgConfig.m_enmModulation;
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|
m_objConfig.m_fltVoltLevelSynchroBlack = objCfg.m_objMsgConfig.m_fltVoltLevelSynchroBlack;
|
|
m_objConfig.m_fltVoltLevelSynchroTop = objCfg.m_objMsgConfig.m_fltVoltLevelSynchroTop;
|
|
m_objConfig.m_intFramePerS = objCfg.m_objMsgConfig.m_intFramePerS;
|
|
m_objConfig.m_fltLineDurationUs = objCfg.m_objMsgConfig.m_fltLineDurationUs;
|
|
m_objConfig.m_intPercentOfRowsToDisplay = objCfg.m_objMsgConfig.m_intPercentOfRowsToDisplay;
|
|
m_objConfig.m_fltTopDurationUs = objCfg.m_objMsgConfig.m_fltTopDurationUs;
|
|
m_objConfig.m_blnHSync = objCfg.m_objMsgConfig.m_blnHSync;
|
|
m_objConfig.m_blnVSync = objCfg.m_objMsgConfig.m_blnVSync;
|
|
|
|
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_fltLineDurationUs != m_objRunning.m_fltLineDurationUs)
|
|
|| (objCfg.m_objMsgConfig.m_intPercentOfRowsToDisplay != m_objRunning.m_intPercentOfRowsToDisplay)
|
|
|| (objCfg.m_objMsgConfig.m_fltTopDurationUs != m_objRunning.m_fltTopDurationUs)
|
|
|| (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_fltLineDurationUs = objCfg.m_objMsgConfig.m_fltLineDurationUs;
|
|
m_objRunning.m_intPercentOfRowsToDisplay = objCfg.m_objMsgConfig.m_intPercentOfRowsToDisplay;
|
|
m_objRunning.m_fltTopDurationUs = objCfg.m_objMsgConfig.m_fltTopDurationUs;
|
|
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_intSampleRate==0)
|
|
{
|
|
return;
|
|
}
|
|
|
|
|
|
InitATVParameters(
|
|
m_objRunning.m_intSampleRate,
|
|
m_objRunning.m_fltLineDurationUs,
|
|
m_objRunning.m_fltTopDurationUs,
|
|
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_intSampleRate;
|
|
}
|
|
|