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pauxdataset.cpp
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/******************************************************************************
*
* Project: PCI .aux Driver
* Purpose: Implementation of PAuxDataset
* Author: Frank Warmerdam, [email protected]
*
******************************************************************************
* Copyright (c) 1999, Frank Warmerdam
* Copyright (c) 2008-2010, Even Rouault <even dot rouault at spatialys.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
****************************************************************************/
#include "cpl_string.h"
#include "gdal_frmts.h"
#include "ogr_spatialref.h"
#include "rawdataset.h"
#include <cmath>
/************************************************************************/
/* ==================================================================== */
/* PAuxDataset */
/* ==================================================================== */
/************************************************************************/
class PAuxRasterBand;
class PAuxDataset final : public RawDataset
{
friend class PAuxRasterBand;
VSILFILE *fpImage; // Image data file.
int nGCPCount;
GDAL_GCP *pasGCPList;
OGRSpatialReference m_oGCPSRS{};
void ScanForGCPs();
static OGRSpatialReference PCI2SRS(const char *pszGeosys,
const char *pszProjParams);
OGRSpatialReference m_oSRS{};
CPL_DISALLOW_COPY_ASSIGN(PAuxDataset)
CPLErr Close() override;
public:
PAuxDataset();
~PAuxDataset() override;
// TODO(schwehr): Why are these public?
char *pszAuxFilename;
char **papszAuxLines;
int bAuxUpdated;
const OGRSpatialReference *GetSpatialRef() const override
{
return m_oSRS.IsEmpty() ? nullptr : &m_oSRS;
}
CPLErr GetGeoTransform(double *) override;
CPLErr SetGeoTransform(double *) override;
int GetGCPCount() override;
const OGRSpatialReference *GetGCPSpatialRef() const override
{
return m_oGCPSRS.IsEmpty() ? nullptr : &m_oGCPSRS;
}
const GDAL_GCP *GetGCPs() override;
char **GetFileList() override;
static GDALDataset *Open(GDALOpenInfo *);
static GDALDataset *Create(const char *pszFilename, int nXSize, int nYSize,
int nBandsIn, GDALDataType eType,
char **papszParamList);
};
/************************************************************************/
/* ==================================================================== */
/* PAuxRasterBand */
/* ==================================================================== */
/************************************************************************/
class PAuxRasterBand final : public RawRasterBand
{
CPL_DISALLOW_COPY_ASSIGN(PAuxRasterBand)
public:
PAuxRasterBand(GDALDataset *poDS, int nBand, VSILFILE *fpRaw,
vsi_l_offset nImgOffset, int nPixelOffset, int nLineOffset,
GDALDataType eDataType, int bNativeOrder);
~PAuxRasterBand() override;
double GetNoDataValue(int *pbSuccess = nullptr) override;
CPLErr SetNoDataValue(double) override;
GDALColorTable *GetColorTable() override;
GDALColorInterp GetColorInterpretation() override;
void SetDescription(const char *pszNewDescription) override;
};
/************************************************************************/
/* PAuxRasterBand() */
/************************************************************************/
PAuxRasterBand::PAuxRasterBand(GDALDataset *poDSIn, int nBandIn,
VSILFILE *fpRawIn, vsi_l_offset nImgOffsetIn,
int nPixelOffsetIn, int nLineOffsetIn,
GDALDataType eDataTypeIn, int bNativeOrderIn)
: RawRasterBand(poDSIn, nBandIn, fpRawIn, nImgOffsetIn, nPixelOffsetIn,
nLineOffsetIn, eDataTypeIn, bNativeOrderIn,
RawRasterBand::OwnFP::NO)
{
PAuxDataset *poPDS = reinterpret_cast<PAuxDataset *>(poDS);
/* -------------------------------------------------------------------- */
/* Does this channel have a description? */
/* -------------------------------------------------------------------- */
char szTarget[128] = {'\0'};
snprintf(szTarget, sizeof(szTarget), "ChanDesc-%d", nBand);
if (CSLFetchNameValue(poPDS->papszAuxLines, szTarget) != nullptr)
GDALRasterBand::SetDescription(
CSLFetchNameValue(poPDS->papszAuxLines, szTarget));
/* -------------------------------------------------------------------- */
/* See if we have colors. Currently we must have color zero, */
/* but this should not really be a limitation. */
/* -------------------------------------------------------------------- */
snprintf(szTarget, sizeof(szTarget), "METADATA_IMG_%d_Class_%d_Color",
nBand, 0);
if (CSLFetchNameValue(poPDS->papszAuxLines, szTarget) != nullptr)
{
poCT = new GDALColorTable();
for (int i = 0; i < 256; i++)
{
snprintf(szTarget, sizeof(szTarget),
"METADATA_IMG_%d_Class_%d_Color", nBand, i);
const char *pszLine =
CSLFetchNameValue(poPDS->papszAuxLines, szTarget);
while (pszLine && *pszLine == ' ')
pszLine++;
int nRed = 0;
int nGreen = 0;
int nBlue = 0;
// TODO(schwehr): Replace sscanf with something safe.
if (pszLine != nullptr && STARTS_WITH_CI(pszLine, "(RGB:") &&
sscanf(pszLine + 5, "%d %d %d", &nRed, &nGreen, &nBlue) == 3)
{
GDALColorEntry oColor = {static_cast<short>(nRed),
static_cast<short>(nGreen),
static_cast<short>(nBlue), 255};
poCT->SetColorEntry(i, &oColor);
}
}
}
}
/************************************************************************/
/* ~PAuxRasterBand() */
/************************************************************************/
PAuxRasterBand::~PAuxRasterBand()
{
}
/************************************************************************/
/* GetNoDataValue() */
/************************************************************************/
double PAuxRasterBand::GetNoDataValue(int *pbSuccess)
{
char szTarget[128] = {'\0'};
snprintf(szTarget, sizeof(szTarget), "METADATA_IMG_%d_NO_DATA_VALUE",
nBand);
PAuxDataset *poPDS = reinterpret_cast<PAuxDataset *>(poDS);
const char *pszLine = CSLFetchNameValue(poPDS->papszAuxLines, szTarget);
if (pbSuccess != nullptr)
*pbSuccess = (pszLine != nullptr);
if (pszLine == nullptr)
return -1.0e8;
return CPLAtof(pszLine);
}
/************************************************************************/
/* SetNoDataValue() */
/************************************************************************/
CPLErr PAuxRasterBand::SetNoDataValue(double dfNewValue)
{
if (GetAccess() == GA_ReadOnly)
{
CPLError(CE_Failure, CPLE_NoWriteAccess,
"Can't update readonly dataset.");
return CE_Failure;
}
char szTarget[128] = {'\0'};
char szValue[128] = {'\0'};
snprintf(szTarget, sizeof(szTarget), "METADATA_IMG_%d_NO_DATA_VALUE",
nBand);
CPLsnprintf(szValue, sizeof(szValue), "%24.12f", dfNewValue);
PAuxDataset *poPDS = reinterpret_cast<PAuxDataset *>(poDS);
poPDS->papszAuxLines =
CSLSetNameValue(poPDS->papszAuxLines, szTarget, szValue);
poPDS->bAuxUpdated = TRUE;
return CE_None;
}
/************************************************************************/
/* SetDescription() */
/* */
/* We override the set description so we can mark the auxfile */
/* info as changed. */
/************************************************************************/
void PAuxRasterBand::SetDescription(const char *pszNewDescription)
{
if (GetAccess() == GA_Update)
{
char szTarget[128] = {'\0'};
snprintf(szTarget, sizeof(szTarget), "ChanDesc-%d", nBand);
PAuxDataset *poPDS = reinterpret_cast<PAuxDataset *>(poDS);
poPDS->papszAuxLines =
CSLSetNameValue(poPDS->papszAuxLines, szTarget, pszNewDescription);
poPDS->bAuxUpdated = TRUE;
}
GDALRasterBand::SetDescription(pszNewDescription);
}
/************************************************************************/
/* GetColorTable() */
/************************************************************************/
GDALColorTable *PAuxRasterBand::GetColorTable()
{
return poCT;
}
/************************************************************************/
/* GetColorInterpretation() */
/************************************************************************/
GDALColorInterp PAuxRasterBand::GetColorInterpretation()
{
if (poCT == nullptr)
return GCI_Undefined;
return GCI_PaletteIndex;
}
/************************************************************************/
/* ==================================================================== */
/* PAuxDataset */
/* ==================================================================== */
/************************************************************************/
/************************************************************************/
/* PAuxDataset() */
/************************************************************************/
PAuxDataset::PAuxDataset()
: fpImage(nullptr), nGCPCount(0), pasGCPList(nullptr),
pszAuxFilename(nullptr), papszAuxLines(nullptr), bAuxUpdated(FALSE)
{
m_oSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
m_oGCPSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
}
/************************************************************************/
/* ~PAuxDataset() */
/************************************************************************/
PAuxDataset::~PAuxDataset()
{
PAuxDataset::Close();
}
/************************************************************************/
/* Close() */
/************************************************************************/
CPLErr PAuxDataset::Close()
{
CPLErr eErr = CE_None;
if (nOpenFlags != OPEN_FLAGS_CLOSED)
{
if (PAuxDataset::FlushCache(true) != CE_None)
eErr = CE_Failure;
if (fpImage != nullptr)
{
if (VSIFCloseL(fpImage) != 0)
{
CPLError(CE_Failure, CPLE_FileIO, "I/O error");
eErr = CE_Failure;
}
}
if (bAuxUpdated)
{
CSLSetNameValueSeparator(papszAuxLines, ": ");
CSLSave(papszAuxLines, pszAuxFilename);
}
GDALDeinitGCPs(nGCPCount, pasGCPList);
CPLFree(pasGCPList);
CPLFree(pszAuxFilename);
CSLDestroy(papszAuxLines);
if (GDALPamDataset::Close() != CE_None)
eErr = CE_Failure;
}
return eErr;
}
/************************************************************************/
/* GetFileList() */
/************************************************************************/
char **PAuxDataset::GetFileList()
{
char **papszFileList = RawDataset::GetFileList();
papszFileList = CSLAddString(papszFileList, pszAuxFilename);
return papszFileList;
}
/************************************************************************/
/* PCI2SRS() */
/* */
/* Convert PCI coordinate system to WKT. For now this is very */
/* incomplete, but can be filled out in the future. */
/************************************************************************/
OGRSpatialReference PAuxDataset::PCI2SRS(const char *pszGeosys,
const char *pszProjParams)
{
while (*pszGeosys == ' ')
pszGeosys++;
/* -------------------------------------------------------------------- */
/* Parse projection parameters array. */
/* -------------------------------------------------------------------- */
double adfProjParams[16] = {0.0};
if (pszProjParams != nullptr)
{
char **papszTokens = CSLTokenizeString(pszProjParams);
for (int i = 0;
i < 16 && papszTokens != nullptr && papszTokens[i] != nullptr; i++)
adfProjParams[i] = CPLAtof(papszTokens[i]);
CSLDestroy(papszTokens);
}
/* -------------------------------------------------------------------- */
/* Convert to SRS. */
/* -------------------------------------------------------------------- */
OGRSpatialReference oSRS;
oSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
if (oSRS.importFromPCI(pszGeosys, nullptr, adfProjParams) != OGRERR_NONE)
{
oSRS.Clear();
}
return oSRS;
}
/************************************************************************/
/* ScanForGCPs() */
/************************************************************************/
void PAuxDataset::ScanForGCPs()
{
const int MAX_GCP = 256;
nGCPCount = 0;
CPLAssert(pasGCPList == nullptr);
pasGCPList =
reinterpret_cast<GDAL_GCP *>(CPLCalloc(sizeof(GDAL_GCP), MAX_GCP));
/* -------------------------------------------------------------------- */
/* Get the GCP coordinate system. */
/* -------------------------------------------------------------------- */
const char *pszMapUnits =
CSLFetchNameValue(papszAuxLines, "GCP_1_MapUnits");
const char *pszProjParams =
CSLFetchNameValue(papszAuxLines, "GCP_1_ProjParms");
if (pszMapUnits != nullptr)
m_oGCPSRS = PCI2SRS(pszMapUnits, pszProjParams);
/* -------------------------------------------------------------------- */
/* Collect standalone GCPs. They look like: */
/* */
/* GCP_1_n = row, col, x, y [,z [,"id"[, "desc"]]] */
/* -------------------------------------------------------------------- */
for (int i = 0; nGCPCount < MAX_GCP; i++)
{
char szName[50] = {'\0'};
snprintf(szName, sizeof(szName), "GCP_1_%d", i + 1);
if (CSLFetchNameValue(papszAuxLines, szName) == nullptr)
break;
char **papszTokens = CSLTokenizeStringComplex(
CSLFetchNameValue(papszAuxLines, szName), " ", TRUE, FALSE);
if (CSLCount(papszTokens) >= 4)
{
GDALInitGCPs(1, pasGCPList + nGCPCount);
pasGCPList[nGCPCount].dfGCPX = CPLAtof(papszTokens[2]);
pasGCPList[nGCPCount].dfGCPY = CPLAtof(papszTokens[3]);
pasGCPList[nGCPCount].dfGCPPixel = CPLAtof(papszTokens[0]);
pasGCPList[nGCPCount].dfGCPLine = CPLAtof(papszTokens[1]);
if (CSLCount(papszTokens) > 4)
pasGCPList[nGCPCount].dfGCPZ = CPLAtof(papszTokens[4]);
CPLFree(pasGCPList[nGCPCount].pszId);
if (CSLCount(papszTokens) > 5)
{
pasGCPList[nGCPCount].pszId = CPLStrdup(papszTokens[5]);
}
else
{
snprintf(szName, sizeof(szName), "GCP_%d", i + 1);
pasGCPList[nGCPCount].pszId = CPLStrdup(szName);
}
if (CSLCount(papszTokens) > 6)
{
CPLFree(pasGCPList[nGCPCount].pszInfo);
pasGCPList[nGCPCount].pszInfo = CPLStrdup(papszTokens[6]);
}
nGCPCount++;
}
CSLDestroy(papszTokens);
}
}
/************************************************************************/
/* GetGCPCount() */
/************************************************************************/
int PAuxDataset::GetGCPCount()
{
return nGCPCount;
}
/************************************************************************/
/* GetGCP() */
/************************************************************************/
const GDAL_GCP *PAuxDataset::GetGCPs()
{
return pasGCPList;
}
/************************************************************************/
/* GetGeoTransform() */
/************************************************************************/
CPLErr PAuxDataset::GetGeoTransform(double *padfGeoTransform)
{
if (CSLFetchNameValue(papszAuxLines, "UpLeftX") == nullptr ||
CSLFetchNameValue(papszAuxLines, "UpLeftY") == nullptr ||
CSLFetchNameValue(papszAuxLines, "LoRightX") == nullptr ||
CSLFetchNameValue(papszAuxLines, "LoRightY") == nullptr)
{
padfGeoTransform[0] = 0.0;
padfGeoTransform[1] = 1.0;
padfGeoTransform[2] = 0.0;
padfGeoTransform[3] = 0.0;
padfGeoTransform[4] = 0.0;
padfGeoTransform[5] = 1.0;
return CE_Failure;
}
const double dfUpLeftX =
CPLAtof(CSLFetchNameValue(papszAuxLines, "UpLeftX"));
const double dfUpLeftY =
CPLAtof(CSLFetchNameValue(papszAuxLines, "UpLeftY"));
const double dfLoRightX =
CPLAtof(CSLFetchNameValue(papszAuxLines, "LoRightX"));
const double dfLoRightY =
CPLAtof(CSLFetchNameValue(papszAuxLines, "LoRightY"));
padfGeoTransform[0] = dfUpLeftX;
padfGeoTransform[1] = (dfLoRightX - dfUpLeftX) / GetRasterXSize();
padfGeoTransform[2] = 0.0;
padfGeoTransform[3] = dfUpLeftY;
padfGeoTransform[4] = 0.0;
padfGeoTransform[5] = (dfLoRightY - dfUpLeftY) / GetRasterYSize();
return CE_None;
}
/************************************************************************/
/* SetGeoTransform() */
/************************************************************************/
CPLErr PAuxDataset::SetGeoTransform(double *padfGeoTransform)
{
char szUpLeftX[128] = {'\0'};
char szUpLeftY[128] = {'\0'};
char szLoRightX[128] = {'\0'};
char szLoRightY[128] = {'\0'};
if (std::abs(padfGeoTransform[0]) < 181 &&
std::abs(padfGeoTransform[1]) < 1)
{
CPLsnprintf(szUpLeftX, sizeof(szUpLeftX), "%.12f", padfGeoTransform[0]);
CPLsnprintf(szUpLeftY, sizeof(szUpLeftY), "%.12f", padfGeoTransform[3]);
CPLsnprintf(szLoRightX, sizeof(szLoRightX), "%.12f",
padfGeoTransform[0] +
padfGeoTransform[1] * GetRasterXSize());
CPLsnprintf(szLoRightY, sizeof(szLoRightY), "%.12f",
padfGeoTransform[3] +
padfGeoTransform[5] * GetRasterYSize());
}
else
{
CPLsnprintf(szUpLeftX, sizeof(szUpLeftX), "%.3f", padfGeoTransform[0]);
CPLsnprintf(szUpLeftY, sizeof(szUpLeftY), "%.3f", padfGeoTransform[3]);
CPLsnprintf(szLoRightX, sizeof(szLoRightX), "%.3f",
padfGeoTransform[0] +
padfGeoTransform[1] * GetRasterXSize());
CPLsnprintf(szLoRightY, sizeof(szLoRightY), "%.3f",
padfGeoTransform[3] +
padfGeoTransform[5] * GetRasterYSize());
}
papszAuxLines = CSLSetNameValue(papszAuxLines, "UpLeftX", szUpLeftX);
papszAuxLines = CSLSetNameValue(papszAuxLines, "UpLeftY", szUpLeftY);
papszAuxLines = CSLSetNameValue(papszAuxLines, "LoRightX", szLoRightX);
papszAuxLines = CSLSetNameValue(papszAuxLines, "LoRightY", szLoRightY);
bAuxUpdated = TRUE;
return CE_None;
}
/************************************************************************/
/* Open() */
/************************************************************************/
GDALDataset *PAuxDataset::Open(GDALOpenInfo *poOpenInfo)
{
if (poOpenInfo->nHeaderBytes < 1)
return nullptr;
/* -------------------------------------------------------------------- */
/* If this is an .aux file, fetch out and form the name of the */
/* file it references. */
/* -------------------------------------------------------------------- */
CPLString osTarget = poOpenInfo->pszFilename;
if (EQUAL(CPLGetExtension(poOpenInfo->pszFilename), "aux") &&
STARTS_WITH_CI(reinterpret_cast<char *>(poOpenInfo->pabyHeader),
"AuxilaryTarget: "))
{
const char *pszSrc =
reinterpret_cast<const char *>(poOpenInfo->pabyHeader + 16);
char szAuxTarget[1024] = {'\0'};
for (int i = 0; i < static_cast<int>(sizeof(szAuxTarget)) - 1 &&
pszSrc[i] != 10 && pszSrc[i] != 13 && pszSrc[i] != '\0';
i++)
{
szAuxTarget[i] = pszSrc[i];
}
szAuxTarget[sizeof(szAuxTarget) - 1] = '\0';
const std::string osPath(CPLGetPath(poOpenInfo->pszFilename));
osTarget = CPLFormFilename(osPath.c_str(), szAuxTarget, nullptr);
}
/* -------------------------------------------------------------------- */
/* Now we need to tear apart the filename to form a .aux */
/* filename. */
/* -------------------------------------------------------------------- */
CPLString osAuxFilename = CPLResetExtension(osTarget, "aux");
/* -------------------------------------------------------------------- */
/* Do we have a .aux file? */
/* -------------------------------------------------------------------- */
char **papszSiblingFiles = poOpenInfo->GetSiblingFiles();
if (papszSiblingFiles != nullptr &&
CSLFindString(papszSiblingFiles, CPLGetFilename(osAuxFilename)) == -1)
{
return nullptr;
}
VSILFILE *fp = VSIFOpenL(osAuxFilename, "r");
if (fp == nullptr)
{
osAuxFilename = CPLResetExtension(osTarget, "AUX");
fp = VSIFOpenL(osAuxFilename, "r");
}
if (fp == nullptr)
return nullptr;
/* -------------------------------------------------------------------- */
/* Is this file a PCI .aux file? Check the first line for the */
/* telltale AuxilaryTarget keyword. */
/* */
/* At this point we should be verifying that it refers to our */
/* binary file, but that is a pretty involved test. */
/* -------------------------------------------------------------------- */
CPLPushErrorHandler(CPLQuietErrorHandler);
const char *pszLine = CPLReadLine2L(fp, 1024, nullptr);
CPLPopErrorHandler();
CPL_IGNORE_RET_VAL(VSIFCloseL(fp));
if (pszLine == nullptr || (!STARTS_WITH_CI(pszLine, "AuxilaryTarget") &&
!STARTS_WITH_CI(pszLine, "AuxiliaryTarget")))
{
CPLErrorReset();
return nullptr;
}
/* -------------------------------------------------------------------- */
/* Create a corresponding GDALDataset. */
/* -------------------------------------------------------------------- */
auto poDS = std::make_unique<PAuxDataset>();
/* -------------------------------------------------------------------- */
/* Load the .aux file into a string list suitable to be */
/* searched with CSLFetchNameValue(). */
/* -------------------------------------------------------------------- */
poDS->papszAuxLines = CSLLoad2(osAuxFilename, 1024, 1024, nullptr);
poDS->pszAuxFilename = CPLStrdup(osAuxFilename);
/* -------------------------------------------------------------------- */
/* Find the RawDefinition line to establish overall parameters. */
/* -------------------------------------------------------------------- */
pszLine = CSLFetchNameValue(poDS->papszAuxLines, "RawDefinition");
// It seems PCI now writes out .aux files without RawDefinition in
// some cases. See bug 947.
if (pszLine == nullptr)
{
return nullptr;
}
const CPLStringList aosTokens(CSLTokenizeString(pszLine));
if (aosTokens.size() < 3)
{
CPLError(CE_Failure, CPLE_AppDefined,
"RawDefinition missing or corrupt in %s.",
poOpenInfo->pszFilename);
return nullptr;
}
poDS->nRasterXSize = atoi(aosTokens[0]);
poDS->nRasterYSize = atoi(aosTokens[1]);
int l_nBands = atoi(aosTokens[2]);
poDS->eAccess = poOpenInfo->eAccess;
if (!GDALCheckDatasetDimensions(poDS->nRasterXSize, poDS->nRasterYSize) ||
!GDALCheckBandCount(l_nBands, FALSE))
{
return nullptr;
}
/* -------------------------------------------------------------------- */
/* Open the file. */
/* -------------------------------------------------------------------- */
if (poOpenInfo->eAccess == GA_Update)
{
poDS->fpImage = VSIFOpenL(osTarget, "rb+");
if (poDS->fpImage == nullptr)
{
CPLError(CE_Failure, CPLE_OpenFailed,
"File %s is missing or read-only, check permissions.",
osTarget.c_str());
return nullptr;
}
}
else
{
poDS->fpImage = VSIFOpenL(osTarget, "rb");
if (poDS->fpImage == nullptr)
{
CPLError(CE_Failure, CPLE_OpenFailed,
"File %s is missing or unreadable.", osTarget.c_str());
return nullptr;
}
}
/* -------------------------------------------------------------------- */
/* Collect raw definitions of each channel and create */
/* corresponding bands. */
/* -------------------------------------------------------------------- */
for (int i = 0; i < l_nBands; i++)
{
char szDefnName[32] = {'\0'};
snprintf(szDefnName, sizeof(szDefnName), "ChanDefinition-%d", i + 1);
pszLine = CSLFetchNameValue(poDS->papszAuxLines, szDefnName);
if (pszLine == nullptr)
{
continue;
}
const CPLStringList aosTokensBand(CSLTokenizeString(pszLine));
if (aosTokensBand.size() < 4)
{
// Skip the band with broken description
continue;
}
GDALDataType eType = GDT_Unknown;
if (EQUAL(aosTokensBand[0], "16U"))
eType = GDT_UInt16;
else if (EQUAL(aosTokensBand[0], "16S"))
eType = GDT_Int16;
else if (EQUAL(aosTokensBand[0], "32R"))
eType = GDT_Float32;
else
eType = GDT_Byte;
bool bNative = true;
if (CSLCount(aosTokensBand) > 4)
{
#ifdef CPL_LSB
bNative = EQUAL(aosTokensBand[4], "Swapped");
#else
bNative = EQUAL(aosTokensBand[4], "Unswapped");
#endif
}
const vsi_l_offset nBandOffset = CPLScanUIntBig(
aosTokensBand[1], static_cast<int>(strlen(aosTokensBand[1])));
const int nPixelOffset = atoi(aosTokensBand[2]);
const int nLineOffset = atoi(aosTokensBand[3]);
if (nPixelOffset <= 0 || nLineOffset <= 0)
{
// Skip the band with broken offsets.
continue;
}
auto poBand = std::make_unique<PAuxRasterBand>(
poDS.get(), poDS->nBands + 1, poDS->fpImage, nBandOffset,
nPixelOffset, nLineOffset, eType, bNative);
if (!poBand->IsValid())
return nullptr;
poDS->SetBand(poDS->nBands + 1, std::move(poBand));
}
/* -------------------------------------------------------------------- */
/* Get the projection. */
/* -------------------------------------------------------------------- */
const char *pszMapUnits =
CSLFetchNameValue(poDS->papszAuxLines, "MapUnits");
const char *pszProjParams =
CSLFetchNameValue(poDS->papszAuxLines, "ProjParams");
if (pszMapUnits != nullptr)
{
poDS->m_oSRS = PCI2SRS(pszMapUnits, pszProjParams);
}
/* -------------------------------------------------------------------- */
/* Initialize any PAM information. */
/* -------------------------------------------------------------------- */
poDS->SetDescription(osTarget);
poDS->TryLoadXML();
/* -------------------------------------------------------------------- */
/* Check for overviews. */
/* -------------------------------------------------------------------- */
poDS->oOvManager.Initialize(poDS.get(), osTarget);
poDS->ScanForGCPs();
poDS->bAuxUpdated = FALSE;
return poDS.release();
}
/************************************************************************/
/* Create() */
/************************************************************************/
GDALDataset *PAuxDataset::Create(const char *pszFilename, int nXSize,
int nYSize, int nBandsIn, GDALDataType eType,
char **papszOptions)
{
const char *pszInterleave = CSLFetchNameValue(papszOptions, "INTERLEAVE");
if (pszInterleave == nullptr)
pszInterleave = "BAND";
/* -------------------------------------------------------------------- */
/* Verify input options. */
/* -------------------------------------------------------------------- */
if (eType != GDT_Byte && eType != GDT_Float32 && eType != GDT_UInt16 &&
eType != GDT_Int16)
{
CPLError(CE_Failure, CPLE_AppDefined,
"Attempt to create PCI .Aux labelled dataset with an illegal\n"
"data type (%s).\n",
GDALGetDataTypeName(eType));
return nullptr;
}
/* -------------------------------------------------------------------- */
/* Sum the sizes of the band pixel types. */
/* -------------------------------------------------------------------- */
int nPixelSizeSum = 0;
for (int iBand = 0; iBand < nBandsIn; iBand++)
nPixelSizeSum += GDALGetDataTypeSizeBytes(eType);
/* -------------------------------------------------------------------- */
/* Try to create the file. */
/* -------------------------------------------------------------------- */
VSILFILE *fp = VSIFOpenL(pszFilename, "w");
if (fp == nullptr)
{
CPLError(CE_Failure, CPLE_OpenFailed,
"Attempt to create file `%s' failed.\n", pszFilename);
return nullptr;
}
/* -------------------------------------------------------------------- */
/* Just write out a couple of bytes to establish the binary */
/* file, and then close it. */
/* -------------------------------------------------------------------- */
CPL_IGNORE_RET_VAL(VSIFWriteL("\0\0", 2, 1, fp));
CPL_IGNORE_RET_VAL(VSIFCloseL(fp));
/* -------------------------------------------------------------------- */
/* Create the aux filename. */
/* -------------------------------------------------------------------- */
char *pszAuxFilename =
static_cast<char *>(CPLMalloc(strlen(pszFilename) + 5));
strcpy(pszAuxFilename, pszFilename);
for (int i = static_cast<int>(strlen(pszAuxFilename)) - 1; i > 0; i--)
{
if (pszAuxFilename[i] == '.')
{
pszAuxFilename[i] = '\0';
break;
}
}
strcat(pszAuxFilename, ".aux");
/* -------------------------------------------------------------------- */
/* Open the file. */
/* -------------------------------------------------------------------- */
fp = VSIFOpenL(pszAuxFilename, "wt");
if (fp == nullptr)
{
CPLError(CE_Failure, CPLE_OpenFailed,
"Attempt to create file `%s' failed.\n", pszAuxFilename);
return nullptr;
}
CPLFree(pszAuxFilename);
/* -------------------------------------------------------------------- */
/* We need to write out the original filename but without any */
/* path components in the AuxilaryTarget line. Do so now. */
/* -------------------------------------------------------------------- */
int iStart = static_cast<int>(strlen(pszFilename)) - 1;
while (iStart > 0 && pszFilename[iStart - 1] != '/' &&
pszFilename[iStart - 1] != '\\')
iStart--;
CPL_IGNORE_RET_VAL(
VSIFPrintfL(fp, "AuxilaryTarget: %s\n", pszFilename + iStart));
/* -------------------------------------------------------------------- */
/* Write out the raw definition for the dataset as a whole. */
/* -------------------------------------------------------------------- */
CPL_IGNORE_RET_VAL(
VSIFPrintfL(fp, "RawDefinition: %d %d %d\n", nXSize, nYSize, nBandsIn));
/* -------------------------------------------------------------------- */
/* Write out a definition for each band. We always write band */
/* sequential files for now as these are pretty efficiently */
/* handled by GDAL. */
/* -------------------------------------------------------------------- */
vsi_l_offset nImgOffset = 0;
for (int iBand = 0; iBand < nBandsIn; iBand++)
{
int nPixelOffset = 0;
int nLineOffset = 0;
vsi_l_offset nNextImgOffset = 0;
/* --------------------------------------------------------------------
*/
/* Establish our file layout based on supplied interleaving. */
/* --------------------------------------------------------------------
*/
if (EQUAL(pszInterleave, "LINE"))
{
nPixelOffset = GDALGetDataTypeSizeBytes(eType);
nLineOffset = nXSize * nPixelSizeSum;
nNextImgOffset =
nImgOffset + static_cast<vsi_l_offset>(nPixelOffset) * nXSize;
}
else if (EQUAL(pszInterleave, "PIXEL"))
{
nPixelOffset = nPixelSizeSum;
nLineOffset = nXSize * nPixelOffset;
nNextImgOffset = nImgOffset + GDALGetDataTypeSizeBytes(eType);
}
else /* default to band */
{
nPixelOffset = GDALGetDataTypeSize(eType) / 8;
nLineOffset = nXSize * nPixelOffset;
nNextImgOffset =
nImgOffset + nYSize * static_cast<vsi_l_offset>(nLineOffset);
}
/* --------------------------------------------------------------------
*/
/* Write out line indicating layout. */
/* --------------------------------------------------------------------
*/
const char *pszTypeName = nullptr;
if (eType == GDT_Float32)
pszTypeName = "32R";
else if (eType == GDT_Int16)
pszTypeName = "16S";
else if (eType == GDT_UInt16)
pszTypeName = "16U";
else
pszTypeName = "8U";
CPL_IGNORE_RET_VAL(VSIFPrintfL(
fp, "ChanDefinition-%d: %s " CPL_FRMT_GIB " %d %d %s\n", iBand + 1,
pszTypeName, static_cast<GIntBig>(nImgOffset), nPixelOffset,
nLineOffset,