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/******************************************************************************
*
* Purpose: Implementation of Prologue class. Parse the prologue of one
* repeat cycle and keep the interesting info.
* Author: Bas Retsios, retsios@itc.nl
*
******************************************************************************
* Copyright (c) 2004, ITC
*
* SPDX-License-Identifier: MIT
******************************************************************************/
#include "cpl_port.h" // Must be first.
#include "prologue.h"
static int size_SatelliteStatus()
{
int iSizePrimary = 1 + 4 + 1 + 1 + 4 + 4 + 1 + 1 + 4 + 4 + 1;
int iSizeOrbitCoef = 4 + 4 + 8 * 8 + 8 * 8 + 8 * 8 + 8 * 8 + 8 * 8 + 8 * 8;
int iSizeOrbit = 4 + 4 + 100 * iSizeOrbitCoef;
int iSizeAttitudeCoef = 4 + 4 + 8 * 8 + 8 * 8 + 8 * 8;
int iSizeAttitude = 4 + 4 + 8 + 100 * iSizeAttitudeCoef;
int iSizeSpinRateatRCStart = 8;
int iSizeUTCCorrelation = 4 + 4 + 4 * 4 * 3 + 8 + 8 + 8 + 8 + 8;
int iTotalSize = iSizePrimary + iSizeOrbit + iSizeAttitude +
iSizeSpinRateatRCStart + iSizeUTCCorrelation;
return iTotalSize;
}
static int size_ImageAcquisition()
{
// up to DHSSSynchSelection
int iSize1 = 8 + 8 + 8 + 12 + 42 + 42 * 2 + 2 + 2 + 2 + 2 + 1;
// up to RefocusingDirection
int iSize2 = 42 * 2 + 42 + 42 * 2 + 42 * 2 + 42 * 2 + 27 * 2 + 15 * 2 +
6 * 2 + 1 + 2 + 1;
// to end
int iSize3 =
2 + 1 + 2 + 4 + 2 + 2 + 2 + 1 + 4 + 1 + 4 + 4 + 1 + 1 + 2 + 2 + 2 + 2;
int iTotalSize = iSize1 + iSize2 + iSize3;
return iTotalSize;
}
static int size_CelestialEvents()
{
int iSizeCelestialBodies = 2 + 2 + 4 + 4 +
3 * 100 * (2 + 2 + 8 * 8 + 8 * 8) +
100 * (20 * (2 + 2 + 2 + 8 * 8 + 8 * 8));
int iSizeRelationToImage = 1 + 2 + 2 + 1 + 1 + 1;
int iTotalSize = iSizeCelestialBodies + iSizeRelationToImage;
return iTotalSize;
}
static int size_Correction()
{
return 19229;
}
static double iReadDouble(std::ifstream &ifile)
{
double rVal;
ifile.read(reinterpret_cast<char *>(&rVal), 8);
CPL_MSBPTR64(&rVal);
return rVal;
}
static double iReadReal(std::ifstream &ifile)
{
float fVal;
ifile.read(reinterpret_cast<char *>(&fVal), 4);
CPL_MSBPTR32(&fVal);
return fVal;
}
static int iReadInt(std::ifstream &ifile)
{
int iResult;
ifile.read(reinterpret_cast<char *>(&iResult), 4);
CPL_MSBPTR32(&iResult);
return iResult;
}
static unsigned char iReadByte(std::ifstream &ifile)
{
// will read 1 byte from the file
char b;
ifile.read(&b, 1);
return b;
}
ReferenceGridRecord::ReferenceGridRecord(std::ifstream &ifile)
{
NumberOfLines = iReadInt(ifile);
NumberOfColumns = iReadInt(ifile);
LineDirGridStep = iReadReal(ifile);
ColumnDirGridStep = iReadReal(ifile);
GridOrigin = iReadByte(ifile);
}
PlannedCoverageVIS_IRRecord::PlannedCoverageVIS_IRRecord(std::ifstream &ifile)
{
SouthernLinePlanned = iReadInt(ifile);
NorthernLinePlanned = iReadInt(ifile);
EasternColumnPlanned = iReadInt(ifile);
WesternColumnPlanned = iReadInt(ifile);
}
PlannedCoverageHRVRecord::PlannedCoverageHRVRecord(std::ifstream &ifile)
{
LowerSouthLinePlanned = iReadInt(ifile);
LowerNorthLinePlanned = iReadInt(ifile);
LowerEastColumnPlanned = iReadInt(ifile);
LowerWestColumnPlanned = iReadInt(ifile);
UpperSouthLinePlanned = iReadInt(ifile);
UpperNorthLinePlanned = iReadInt(ifile);
UpperEastColumnPlanned = iReadInt(ifile);
UpperWestColumnPlanned = iReadInt(ifile);
}
ImageDescriptionRecord::ImageDescriptionRecord(std::ifstream &ifile)
{
TypeOfProjection = iReadByte(ifile);
LongitudeOfSSP = iReadReal(ifile);
ReferenceGridVIS_IR = new ReferenceGridRecord(ifile);
ReferenceGridHRV = new ReferenceGridRecord(ifile);
PlannedCoverageVIS_IR = new PlannedCoverageVIS_IRRecord(ifile);
PlannedCoverageHRV = new PlannedCoverageHRVRecord(ifile);
ImageProcDirection = iReadByte(ifile);
PixelGenDirection = iReadByte(ifile);
for (int i = 0; i < 12; ++i)
PlannedChannelProcessing[i] = iReadByte(ifile);
}
ImageDescriptionRecord::~ImageDescriptionRecord()
{
delete ReferenceGridVIS_IR;
delete ReferenceGridHRV;
delete PlannedCoverageVIS_IR;
delete PlannedCoverageHRV;
}
RadiometricProcessingRecord::RadiometricProcessingRecord(std::ifstream &ifile)
{
// skip a part that doesn't interest us
unsigned char dummy[12];
int i;
for (i = 0; i < 6; ++i)
ifile.read((char *)dummy, 12);
for (i = 0; i < 12; ++i)
{
Cal_Slope[i] = iReadDouble(ifile);
Cal_Offset[i] = iReadDouble(ifile);
}
}
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
Prologue::Prologue() : m_idr(nullptr), m_rpr(nullptr)
{
}
Prologue::~Prologue()
{
if (m_idr)
delete m_idr;
if (m_rpr)
delete m_rpr;
}
void Prologue::read(std::ifstream &ifile)
{
/*unsigned char version = */ iReadByte(ifile);
int iSkipHeadersSize = size_SatelliteStatus() + size_ImageAcquisition() +
size_CelestialEvents() + size_Correction();
ifile.seekg(iSkipHeadersSize, std::ios_base::cur);
m_idr = new ImageDescriptionRecord(ifile);
m_rpr = new RadiometricProcessingRecord(ifile);
// TODO: file is not left at the end of the Radiometric Processing Record
}
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