#include "gdal_frmts.h"
#include "gdal_pam.h"
#include <algorithm>
CPL_CVSID("$Id: jdemdataset.cpp 8e5eeb35bf76390e3134a4ea7076dab7d478ea0e 2018-11-14 22:55:13 +0100 Even Rouault $")
static int JDEMGetField( const char *pszField, int nWidth )
{
char szWork[32] = {};
CPLAssert(nWidth <
static_cast<int>(
sizeof(szWork)));
strncpy(szWork, pszField, nWidth);
szWork[nWidth] = '\0';
return atoi(szWork);
}
static double JDEMGetAngle( const char *pszField )
{
const int nAngle = JDEMGetField(pszField, 7);
const int nDegree = nAngle / 10000;
const int nMin = (nAngle / 100) % 100;
const int nSec = nAngle % 100;
return nDegree + nMin / 60.0 + nSec / 3600.0;
}
class JDEMRasterBand;
{
friend class JDEMRasterBand;
public:
JDEMDataset();
~JDEMDataset();
const char *_GetProjectionRef() override;
return GetSpatialRefFromOldGetProjectionRef();
}
};
{
friend class JDEMDataset;
int nRecordSize;
char *pszRecord;
bool bBufferAllocFailed;
public:
JDEMRasterBand( JDEMDataset *, int );
virtual ~JDEMRasterBand();
};
JDEMRasterBand::JDEMRasterBand( JDEMDataset *poDSIn, int nBandIn ) :
nRecordSize(poDSIn->GetRasterXSize() * 5 + 9 + 2),
pszRecord(nullptr),
bBufferAllocFailed(false)
{
poDS = poDSIn;
nBand = nBandIn;
nBlockXSize = poDS->GetRasterXSize();
nBlockYSize = 1;
}
JDEMRasterBand::~JDEMRasterBand() {
VSIFree(pszRecord); }
int nBlockYOff,
void * pImage )
{
JDEMDataset *poGDS = static_cast<JDEMDataset *>(poDS);
if (pszRecord == nullptr)
{
if (bBufferAllocFailed)
return CE_Failure;
if (pszRecord == nullptr)
{
bBufferAllocFailed = true;
return CE_Failure;
}
}
CPL_IGNORE_RET_VAL(
VSIFSeekL(poGDS->fp, 1011 + nRecordSize * nBlockYOff, SEEK_SET));
CPL_IGNORE_RET_VAL(
VSIFReadL(pszRecord, 1, nRecordSize, poGDS->fp));
if( !
EQUALN(
reinterpret_cast<char *
>(poGDS->abyHeader), pszRecord, 6) )
{
"JDEM Scanline corrupt. Perhaps file was not transferred "
"in binary mode?");
return CE_Failure;
}
if( JDEMGetField(pszRecord + 6, 3) != nBlockYOff + 1 )
{
"JDEM scanline out of order, JDEM driver does not "
"currently support partial datasets.");
return CE_Failure;
}
for( int i = 0; i < nBlockXSize; i++ )
static_cast<float *>(pImage)[i] =
JDEMGetField(pszRecord + 9 + 5 * i, 5) * 0.1f;
return CE_None;
}
JDEMDataset::JDEMDataset() :
fp(nullptr)
{
}
JDEMDataset::~JDEMDataset()
{
FlushCache();
if( fp != nullptr )
}
CPLErr JDEMDataset::GetGeoTransform(
double *padfTransform )
{
const char *psHeader = reinterpret_cast<char *>(abyHeader);
const double dfLLLat = JDEMGetAngle(psHeader + 29);
const double dfLLLong = JDEMGetAngle(psHeader + 36);
const double dfURLat = JDEMGetAngle(psHeader + 43);
const double dfURLong = JDEMGetAngle(psHeader + 50);
padfTransform[0] = dfLLLong;
padfTransform[3] = dfURLat;
padfTransform[1] = (dfURLong - dfLLLong) / GetRasterXSize();
padfTransform[2] = 0.0;
padfTransform[4] = 0.0;
padfTransform[5] = -1 * (dfURLat - dfLLLat) / GetRasterYSize();
return CE_None;
}
const char *JDEMDataset::_GetProjectionRef()
{
return
"GEOGCS[\"Tokyo\",DATUM[\"Tokyo\","
"SPHEROID[\"Bessel 1841\",6377397.155,299.1528128,"
"AUTHORITY[\"EPSG\",7004]],TOWGS84[-148,507,685,0,0,0,0],"
"AUTHORITY[\"EPSG\",6301]],PRIMEM[\"Greenwich\",0,"
"AUTHORITY[\"EPSG\",8901]],UNIT[\"DMSH\",0.0174532925199433,"
"AUTHORITY[\"EPSG\",9108]],AUTHORITY[\"EPSG\",4301]]";
}
{
return FALSE;
const char *psHeader =
reinterpret_cast<char *
>(poOpenInfo->
pabyHeader);
{
return FALSE;
}
return TRUE;
}
{
if (!Identify(poOpenInfo))
return nullptr;
{
"The JDEM driver does not support update access to existing "
"datasets.");
return nullptr;
}
if( poOpenInfo->
fpL ==
nullptr )
{
return nullptr;
}
JDEMDataset *poDS = new JDEMDataset();
poDS->fp = poOpenInfo->
fpL;
poOpenInfo->
fpL =
nullptr;
CPL_IGNORE_RET_VAL(
VSIFReadL(poDS->abyHeader, 1, 1012, poDS->fp));
const char *psHeader = reinterpret_cast<char *>(poDS->abyHeader);
poDS->nRasterXSize = JDEMGetField(psHeader + 23, 3);
poDS->nRasterYSize = JDEMGetField(psHeader + 26, 3);
if( poDS->nRasterXSize <= 0 || poDS->nRasterYSize <= 0 )
{
"Invalid dimensions : %d x %d",
poDS->nRasterXSize, poDS->nRasterYSize);
delete poDS;
return nullptr;
}
poDS->SetBand(1, new JDEMRasterBand(poDS, 1));
poDS->TryLoadXML();
poDS->oOvManager.Initialize(poDS, poOpenInfo->
pszFilename);
return poDS;
}
void GDALRegister_JDEM()
{
return;
poDriver->pfnOpen = JDEMDataset::Open;
poDriver->pfnIdentify = JDEMDataset::Identify;
}
A set of associated raster bands, usually from one file.
Definition: gdal_priv.h:336
static GDALDataset * Open(const char *pszFilename, unsigned int nOpenFlags=0, const char *const *papszAllowedDrivers=nullptr, const char *const *papszOpenOptions=nullptr, const char *const *papszSiblingFiles=nullptr)
Definition: gdal_priv.h:613
int RegisterDriver(GDALDriver *)
Register a driver for use.
Definition: gdaldrivermanager.cpp:425
Format specific driver.
Definition: gdal_priv.h:1424
CPLErr SetMetadataItem(const char *pszName, const char *pszValue, const char *pszDomain="") override
Set single metadata item.
Definition: gdaldriver.cpp:2144
virtual void SetDescription(const char *)
Set object description.
Definition: gdalmajorobject.cpp:120
Class for dataset open functions.
Definition: gdal_priv.h:266
GByte * pabyHeader
Buffer with first bytes of the file.
Definition: gdal_priv.h:297
GDALAccess eAccess
Access flag.
Definition: gdal_priv.h:282
VSILFILE * fpL
Pointer to the file.
Definition: gdal_priv.h:292
char * pszFilename
Filename.
Definition: gdal_priv.h:277
int nHeaderBytes
Number of bytes in pabyHeader.
Definition: gdal_priv.h:295
PAM dataset.
Definition: gdal_pam.h:115
CPLErr GetGeoTransform(double *) override
Fetch the affine transformation coefficients.
Definition: gdalpamdataset.cpp:1182
const OGRSpatialReference * GetSpatialRef() const override
Fetch the spatial reference for this dataset.
Definition: gdalpamdataset.cpp:1149
PAM raster band.
Definition: gdal_pam.h:248
virtual CPLErr IReadBlock(int nBlockXOff, int nBlockYOff, void *pData)=0
Read a block of data.
This class represents an OpenGIS Spatial Reference System, and contains methods for converting betwee...
Definition: ogr_spatialref.h:157
#define CPLE_NotSupported
Not supported.
Definition: cpl_error.h:109
#define CPLAssert(expr)
Assert on an expression.
Definition: cpl_error.h:186
CPLErr
Error category.
Definition: cpl_error.h:53
#define CPLE_AppDefined
Application defined error.
Definition: cpl_error.h:99
void CPLError(CPLErr eErrClass, CPLErrorNum err_no, const char *fmt,...)
Report an error.
Definition: cpl_error.cpp:308
Core portability definitions for CPL.
#define CPL_UNUSED
Qualifier for an argument that is unused.
Definition: cpl_port.h:948
#define EQUALN(a, b, n)
Alias for strncasecmp() == 0.
Definition: cpl_port.h:567
unsigned char GByte
Unsigned byte type.
Definition: cpl_port.h:215
#define CPL_ARRAYSIZE(array)
Returns the size of C style arrays.
Definition: cpl_port.h:1045
#define STARTS_WITH_CI(a, b)
Returns whether a starts with b (case insensitive comparison)
Definition: cpl_port.h:580
size_t VSIFReadL(void *, size_t, size_t, VSILFILE *) EXPERIMENTAL_CPL_WARN_UNUSED_RESULT
Read bytes from file.
Definition: cpl_vsil.cpp:1690
#define VSI_MALLOC_VERBOSE(size)
VSI_MALLOC_VERBOSE.
Definition: cpl_vsi.h:268
int VSIFSeekL(VSILFILE *, vsi_l_offset, int) EXPERIMENTAL_CPL_WARN_UNUSED_RESULT
Seek to requested offset.
Definition: cpl_vsil.cpp:1532
int VSIFCloseL(VSILFILE *) EXPERIMENTAL_CPL_WARN_UNUSED_RESULT
Close file.
Definition: cpl_vsil.cpp:1472
FILE VSILFILE
Opaque type for a FILE that implements the VSIVirtualHandle API.
Definition: cpl_vsi.h:156
void VSIFree(void *)
Analog of free() for data allocated with VSIMalloc(), VSICalloc(), VSIRealloc()
Definition: cpl_vsisimple.cpp:827
@ GA_Update
Definition: gdal.h:115
#define GDAL_DMD_LONGNAME
Long name of the driver.
Definition: gdal.h:280
@ GDT_Float32
Definition: gdal.h:69
#define GDAL_DCAP_RASTER
Capability set by a driver having raster capability.
Definition: gdal.h:358
#define GDAL_DMD_HELPTOPIC
URL (relative to http://gdal.org/) to the help page of the driver.
Definition: gdal.h:283
#define GDAL_DCAP_VIRTUALIO
Capability set by a driver that can read/create datasets through the VSI*L API.
Definition: gdal.h:353
GDALDriverH GDALGetDriverByName(const char *)
Fetch a driver based on the short name.
Definition: gdaldrivermanager.cpp:612
#define GDAL_DMD_EXTENSION
Extension handled by the driver.
Definition: gdal.h:289
GDALDriverManager * GetGDALDriverManager(void)
Fetch the global GDAL driver manager.
Definition: gdaldrivermanager.cpp:97