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stactadataset.cpp
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/******************************************************************************
*
* Project: GDAL
* Purpose: STACTA (Spatio-Temporal Asset Catalog Tiled Assets) driver
* Author: Even Rouault, <even dot rouault at spatialys.com>
*
******************************************************************************
* Copyright (c) 2020, 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_json.h"
#include "cpl_mem_cache.h"
#include "cpl_string.h"
#include "gdal_pam.h"
#include "gdal_utils.h"
#include "memdataset.h"
#include "tilematrixset.hpp"
#include "stactadataset.h"
#include <algorithm>
#include <array>
#include <limits>
#include <map>
#include <memory>
#include <vector>
extern "C" void GDALRegister_STACTA();
// Implements a driver for
// https://github.com/stac-extensions/tiled-assets
/************************************************************************/
/* STACTARasterBand() */
/************************************************************************/
STACTARasterBand::STACTARasterBand(STACTADataset *poDSIn, int nBandIn,
GDALRasterBand *poProtoBand)
: m_eColorInterp(poProtoBand->GetColorInterpretation())
{
poDS = poDSIn;
nBand = nBandIn;
eDataType = poProtoBand->GetRasterDataType();
poProtoBand->GetBlockSize(&nBlockXSize, &nBlockYSize);
nRasterXSize = poDSIn->GetRasterXSize();
nRasterYSize = poDSIn->GetRasterYSize();
m_dfNoData = poProtoBand->GetNoDataValue(&m_bHasNoDataValue);
}
/************************************************************************/
/* IReadBlock() */
/************************************************************************/
CPLErr STACTARasterBand::IReadBlock(int nBlockXOff, int nBlockYOff,
void *pImage)
{
auto poGDS = cpl::down_cast<STACTADataset *>(poDS);
return poGDS->m_poDS->GetRasterBand(nBand)->ReadBlock(nBlockXOff,
nBlockYOff, pImage);
}
/************************************************************************/
/* IRasterIO() */
/************************************************************************/
CPLErr STACTARasterBand::IRasterIO(GDALRWFlag eRWFlag, int nXOff, int nYOff,
int nXSize, int nYSize, void *pData,
int nBufXSize, int nBufYSize,
GDALDataType eBufType, GSpacing nPixelSpace,
GSpacing nLineSpace,
GDALRasterIOExtraArg *psExtraArg)
{
auto poGDS = cpl::down_cast<STACTADataset *>(poDS);
if ((nBufXSize < nXSize || nBufYSize < nYSize) &&
poGDS->m_apoOverviewDS.size() >= 1 && eRWFlag == GF_Read)
{
int bTried;
CPLErr eErr = TryOverviewRasterIO(
eRWFlag, nXOff, nYOff, nXSize, nYSize, pData, nBufXSize, nBufYSize,
eBufType, nPixelSpace, nLineSpace, psExtraArg, &bTried);
if (bTried)
return eErr;
}
return poGDS->m_poDS->GetRasterBand(nBand)->RasterIO(
eRWFlag, nXOff, nYOff, nXSize, nYSize, pData, nBufXSize, nBufYSize,
eBufType, nPixelSpace, nLineSpace, psExtraArg);
}
/************************************************************************/
/* IRasterIO() */
/************************************************************************/
CPLErr STACTADataset::IRasterIO(GDALRWFlag eRWFlag, int nXOff, int nYOff,
int nXSize, int nYSize, void *pData,
int nBufXSize, int nBufYSize,
GDALDataType eBufType, int nBandCount,
int *panBandMap, GSpacing nPixelSpace,
GSpacing nLineSpace, GSpacing nBandSpace,
GDALRasterIOExtraArg *psExtraArg)
{
if ((nBufXSize < nXSize || nBufYSize < nYSize) &&
m_apoOverviewDS.size() >= 1 && eRWFlag == GF_Read)
{
int bTried;
CPLErr eErr = TryOverviewRasterIO(
eRWFlag, nXOff, nYOff, nXSize, nYSize, pData, nBufXSize, nBufYSize,
eBufType, nBandCount, panBandMap, nPixelSpace, nLineSpace,
nBandSpace, psExtraArg, &bTried);
if (bTried)
return eErr;
}
return m_poDS->RasterIO(eRWFlag, nXOff, nYOff, nXSize, nYSize, pData,
nBufXSize, nBufYSize, eBufType, nBandCount,
panBandMap, nPixelSpace, nLineSpace, nBandSpace,
psExtraArg);
}
/************************************************************************/
/* GetOverviewCount() */
/************************************************************************/
int STACTARasterBand::GetOverviewCount()
{
STACTADataset *poGDS = cpl::down_cast<STACTADataset *>(poDS);
return static_cast<int>(poGDS->m_apoOverviewDS.size());
}
/************************************************************************/
/* GetOverview() */
/************************************************************************/
GDALRasterBand *STACTARasterBand::GetOverview(int nIdx)
{
STACTADataset *poGDS = cpl::down_cast<STACTADataset *>(poDS);
if (nIdx < 0 || nIdx >= GetOverviewCount())
return nullptr;
return poGDS->m_apoOverviewDS[nIdx]->GetRasterBand(nBand);
}
/************************************************************************/
/* GetNoDataValue() */
/************************************************************************/
double STACTARasterBand::GetNoDataValue(int *pbHasNoData)
{
if (pbHasNoData)
*pbHasNoData = m_bHasNoDataValue;
return m_dfNoData;
}
/************************************************************************/
/* STACTARawRasterBand() */
/************************************************************************/
STACTARawRasterBand::STACTARawRasterBand(STACTARawDataset *poDSIn, int nBandIn,
GDALRasterBand *poProtoBand)
: m_eColorInterp(poProtoBand->GetColorInterpretation())
{
poDS = poDSIn;
nBand = nBandIn;
eDataType = poProtoBand->GetRasterDataType();
nBlockXSize = 256;
nBlockYSize = 256;
int nProtoBlockXSize;
int nProtoBlockYSize;
// Use tile block size if it divides the metatile dimension.
poProtoBand->GetBlockSize(&nProtoBlockXSize, &nProtoBlockYSize);
if ((poDSIn->m_nMetaTileWidth % nProtoBlockXSize) == 0 &&
(poDSIn->m_nMetaTileHeight % nProtoBlockYSize) == 0)
{
nBlockXSize = nProtoBlockXSize;
nBlockYSize = nProtoBlockYSize;
}
nRasterXSize = poDSIn->GetRasterXSize();
nRasterYSize = poDSIn->GetRasterYSize();
m_dfNoData = poProtoBand->GetNoDataValue(&m_bHasNoDataValue);
}
/************************************************************************/
/* STACTARawRasterBand() */
/************************************************************************/
STACTARawRasterBand::STACTARawRasterBand(STACTARawDataset *poDSIn, int nBandIn,
GDALDataType eDT, bool bSetNoData,
double dfNoData)
{
poDS = poDSIn;
nBand = nBandIn;
eDataType = eDT;
nBlockXSize = 256;
nBlockYSize = 256;
nRasterXSize = poDSIn->GetRasterXSize();
nRasterYSize = poDSIn->GetRasterYSize();
m_bHasNoDataValue = bSetNoData;
m_dfNoData = dfNoData;
}
/************************************************************************/
/* GetNoDataValue() */
/************************************************************************/
double STACTARawRasterBand::GetNoDataValue(int *pbHasNoData)
{
if (pbHasNoData)
*pbHasNoData = m_bHasNoDataValue;
return m_dfNoData;
}
/************************************************************************/
/* IReadBlock() */
/************************************************************************/
CPLErr STACTARawRasterBand::IReadBlock(int nBlockXOff, int nBlockYOff,
void *pImage)
{
const int nXOff = nBlockXOff * nBlockXSize;
const int nYOff = nBlockYOff * nBlockYSize;
const int nXSize = std::min(nBlockXSize, nRasterXSize - nXOff);
const int nYSize = std::min(nBlockYSize, nRasterYSize - nYOff);
GDALRasterIOExtraArg sExtraArgs;
INIT_RASTERIO_EXTRA_ARG(sExtraArgs);
const int nDTSize = GDALGetDataTypeSizeBytes(eDataType);
return IRasterIO(GF_Read, nXOff, nYOff, nXSize, nYSize, pImage, nBlockXSize,
nBlockYSize, eDataType, nDTSize,
static_cast<GSpacing>(nDTSize) * nBlockXSize, &sExtraArgs);
}
/************************************************************************/
/* IRasterIO() */
/************************************************************************/
CPLErr STACTARawRasterBand::IRasterIO(GDALRWFlag eRWFlag, int nXOff, int nYOff,
int nXSize, int nYSize, void *pData,
int nBufXSize, int nBufYSize,
GDALDataType eBufType,
GSpacing nPixelSpace, GSpacing nLineSpace,
GDALRasterIOExtraArg *psExtraArg)
{
CPLDebugOnly("STACTA", "Band %d RasterIO: %d,%d,%d,%d->%d,%d", nBand, nXOff,
nYOff, nXSize, nYSize, nBufXSize, nBufYSize);
auto poGDS = cpl::down_cast<STACTARawDataset *>(poDS);
const int nKernelRadius = 3; // up to 3 for Lanczos
const int nRadiusX =
nKernelRadius * static_cast<int>(std::ceil(nXSize / nBufXSize));
const int nRadiusY =
nKernelRadius * static_cast<int>(std::ceil(nYSize / nBufYSize));
const int nXOffMod = std::max(0, nXOff - nRadiusX);
const int nYOffMod = std::max(0, nYOff - nRadiusY);
const int nXSizeMod = static_cast<int>(std::min(
nXOff + nXSize + static_cast<GIntBig>(nRadiusX),
static_cast<GIntBig>(nRasterXSize))) -
nXOffMod;
const int nYSizeMod = static_cast<int>(std::min(
nYOff + nYSize + static_cast<GIntBig>(nRadiusY),
static_cast<GIntBig>(nRasterYSize))) -
nYOffMod;
const bool bRequestFitsInSingleMetaTile =
nXOffMod / poGDS->m_nMetaTileWidth ==
(nXOffMod + nXSizeMod - 1) / poGDS->m_nMetaTileWidth &&
nYOffMod / poGDS->m_nMetaTileHeight ==
(nYOffMod + nYSizeMod - 1) / poGDS->m_nMetaTileHeight;
if (eRWFlag != GF_Read || ((nXSize != nBufXSize || nYSize != nBufYSize) &&
!bRequestFitsInSingleMetaTile))
{
if (!(eRWFlag == GF_Read && nXSizeMod <= 4096 && nYSizeMod <= 4096))
{
// If not reading at nominal resolution, fallback to default block
// reading
return GDALRasterBand::IRasterIO(
eRWFlag, nXOff, nYOff, nXSize, nYSize, pData, nBufXSize,
nBufYSize, eBufType, nPixelSpace, nLineSpace, psExtraArg);
}
}
// Use optimized dataset level RasterIO()
return poGDS->IRasterIO(eRWFlag, nXOff, nYOff, nXSize, nYSize, pData,
nBufXSize, nBufYSize, eBufType, 1, &nBand,
nPixelSpace, nLineSpace, 0, psExtraArg);
}
/************************************************************************/
/* IRasterIO() */
/************************************************************************/
CPLErr STACTARawDataset::IRasterIO(GDALRWFlag eRWFlag, int nXOff, int nYOff,
int nXSize, int nYSize, void *pData,
int nBufXSize, int nBufYSize,
GDALDataType eBufType, int nBandCount,
int *panBandMap, GSpacing nPixelSpace,
GSpacing nLineSpace, GSpacing nBandSpace,
GDALRasterIOExtraArg *psExtraArg)
{
CPLDebugOnly("STACTA", "Dataset RasterIO: %d,%d,%d,%d->%d,%d", nXOff, nYOff,
nXSize, nYSize, nBufXSize, nBufYSize);
const int nMinBlockX = nXOff / m_nMetaTileWidth;
const int nMaxBlockX = (nXOff + nXSize - 1) / m_nMetaTileWidth;
const int nMinBlockY = nYOff / m_nMetaTileHeight;
const int nMaxBlockY = (nYOff + nYSize - 1) / m_nMetaTileHeight;
const int nKernelRadius = 3; // up to 3 for Lanczos
const int nRadiusX =
nKernelRadius * static_cast<int>(std::ceil(nXSize / nBufXSize));
const int nRadiusY =
nKernelRadius * static_cast<int>(std::ceil(nYSize / nBufYSize));
const int nXOffMod = std::max(0, nXOff - nRadiusX);
const int nYOffMod = std::max(0, nYOff - nRadiusY);
const int nXSizeMod = static_cast<int>(std::min(
nXOff + nXSize + static_cast<GIntBig>(nRadiusX),
static_cast<GIntBig>(nRasterXSize))) -
nXOffMod;
const int nYSizeMod = static_cast<int>(std::min(
nYOff + nYSize + static_cast<GIntBig>(nRadiusY),
static_cast<GIntBig>(nRasterYSize))) -
nYOffMod;
const bool bRequestFitsInSingleMetaTile =
nXOffMod / m_nMetaTileWidth ==
(nXOffMod + nXSizeMod - 1) / m_nMetaTileWidth &&
nYOffMod / m_nMetaTileHeight ==
(nYOffMod + nYSizeMod - 1) / m_nMetaTileHeight;
const auto eBandDT = GetRasterBand(1)->GetRasterDataType();
const int nDTSize = GDALGetDataTypeSizeBytes(eBandDT);
if (eRWFlag != GF_Read || ((nXSize != nBufXSize || nYSize != nBufYSize) &&
!bRequestFitsInSingleMetaTile))
{
if (eRWFlag == GF_Read && nXSizeMod <= 4096 && nYSizeMod <= 4096 &&
nBandCount <= 10)
{
// If extracting from a small enough window, do a RasterIO()
// at full resolution into a MEM dataset, and then proceeding to
// resampling on it. This will avoid to fallback on block based
// approach.
GDALRasterIOExtraArg sExtraArgs;
INIT_RASTERIO_EXTRA_ARG(sExtraArgs);
const size_t nXSizeModeMulYSizeModMulDTSize =
static_cast<size_t>(nXSizeMod) * nYSizeMod * nDTSize;
std::vector<GByte> abyBuf(nXSizeModeMulYSizeModMulDTSize *
nBandCount);
if (IRasterIO(GF_Read, nXOffMod, nYOffMod, nXSizeMod, nYSizeMod,
&abyBuf[0], nXSizeMod, nYSizeMod, eBandDT, nBandCount,
panBandMap, nDTSize,
static_cast<GSpacing>(nDTSize) * nXSizeMod,
static_cast<GSpacing>(nDTSize) * nXSizeMod *
nYSizeMod,
&sExtraArgs) != CE_None)
{
return CE_Failure;
}
auto poMEMDS = std::unique_ptr<MEMDataset>(MEMDataset::Create(
"", nXSizeMod, nYSizeMod, 0, eBandDT, nullptr));
for (int i = 0; i < nBandCount; i++)
{
auto hBand = MEMCreateRasterBandEx(
poMEMDS.get(), i + 1,
&abyBuf[0] + i * nXSizeModeMulYSizeModMulDTSize, eBandDT, 0,
0, false);
poMEMDS->AddMEMBand(hBand);
}
sExtraArgs.eResampleAlg = psExtraArg->eResampleAlg;
if (psExtraArg->bFloatingPointWindowValidity)
{
sExtraArgs.bFloatingPointWindowValidity = true;
sExtraArgs.dfXOff = psExtraArg->dfXOff - nXOffMod;
sExtraArgs.dfYOff = psExtraArg->dfYOff - nYOffMod;
sExtraArgs.dfXSize = psExtraArg->dfXSize;
sExtraArgs.dfYSize = psExtraArg->dfYSize;
}
return poMEMDS->RasterIO(
GF_Read, nXOff - nXOffMod, nYOff - nYOffMod, nXSize, nYSize,
pData, nBufXSize, nBufYSize, eBufType, nBandCount, nullptr,
nPixelSpace, nLineSpace, nBandSpace, &sExtraArgs);
}
// If not reading at nominal resolution, fallback to default block
// reading
return GDALDataset::IRasterIO(eRWFlag, nXOff, nYOff, nXSize, nYSize,
pData, nBufXSize, nBufYSize, eBufType,
nBandCount, panBandMap, nPixelSpace,
nLineSpace, nBandSpace, psExtraArg);
}
int nBufYOff = 0;
// If the (uncompressed) size of a metatile is small enough, then download
// it entirely to minimize the number of network requests
const bool bDownloadWholeMetaTile =
m_poMasterDS->m_bDownloadWholeMetaTile ||
(static_cast<GIntBig>(m_nMetaTileWidth) * m_nMetaTileHeight * nBands *
nDTSize <
128 * 1024);
// Split the request on each metatile that it intersects
for (int iY = nMinBlockY; iY <= nMaxBlockY; iY++)
{
const int nTileYOff = std::max(0, nYOff - iY * m_nMetaTileHeight);
const int nTileYSize =
std::min((iY + 1) * m_nMetaTileHeight, nYOff + nYSize) -
std::max(nYOff, iY * m_nMetaTileHeight);
int nBufXOff = 0;
for (int iX = nMinBlockX; iX <= nMaxBlockX; iX++)
{
CPLString osURL(m_osURLTemplate);
osURL.replaceAll("{TileRow}",
CPLSPrintf("%d", iY + m_nMinMetaTileRow));
osURL.replaceAll("{TileCol}",
CPLSPrintf("%d", iX + m_nMinMetaTileCol));
const int nTileXOff = std::max(0, nXOff - iX * m_nMetaTileWidth);
const int nTileXSize =
std::min((iX + 1) * m_nMetaTileWidth, nXOff + nXSize) -
std::max(nXOff, iX * m_nMetaTileWidth);
const int nBufXSizeEffective =
bRequestFitsInSingleMetaTile ? nBufXSize : nTileXSize;
const int nBufYSizeEffective =
bRequestFitsInSingleMetaTile ? nBufYSize : nTileYSize;
bool bMissingTile = false;
do
{
std::unique_ptr<GDALDataset> *ppoTileDS =
m_poMasterDS->m_oCacheTileDS.getPtr(osURL);
if (ppoTileDS == nullptr)
{
// Avoid probing side car files
CPLConfigOptionSetter oSetter(
"GDAL_DISABLE_READDIR_ON_OPEN", "EMPTY_DIR",
/* bSetOnlyIfUndefined = */ true);
CPLStringList aosAllowedDrivers;
aosAllowedDrivers.AddString("GTiff");
aosAllowedDrivers.AddString("PNG");
aosAllowedDrivers.AddString("JPEG");
aosAllowedDrivers.AddString("JP2KAK");
aosAllowedDrivers.AddString("JP2ECW");
aosAllowedDrivers.AddString("JP2MrSID");
aosAllowedDrivers.AddString("JP2OpenJPEG");
std::unique_ptr<GDALDataset> poTileDS;
if (bDownloadWholeMetaTile && !VSIIsLocal(osURL.c_str()))
{
if (m_poMasterDS->m_bSkipMissingMetaTile)
CPLPushErrorHandler(CPLQuietErrorHandler);
VSILFILE *fp = VSIFOpenL(osURL, "rb");
if (m_poMasterDS->m_bSkipMissingMetaTile)
CPLPopErrorHandler();
if (fp == nullptr)
{
if (m_poMasterDS->m_bSkipMissingMetaTile)
{
m_poMasterDS->m_oCacheTileDS.insert(osURL,
nullptr);
bMissingTile = true;
break;
}
CPLError(CE_Failure, CPLE_OpenFailed,
"Cannot open %s", osURL.c_str());
return CE_Failure;
}
GByte *pabyBuf = nullptr;
vsi_l_offset nSize = 0;
if (!VSIIngestFile(fp, nullptr, &pabyBuf, &nSize, -1))
{
VSIFCloseL(fp);
return CE_Failure;
}
VSIFCloseL(fp);
const CPLString osMEMFilename("/vsimem/stacta/" +
osURL);
VSIFCloseL(VSIFileFromMemBuffer(osMEMFilename, pabyBuf,
nSize, TRUE));
poTileDS = std::unique_ptr<GDALDataset>(
GDALDataset::Open(osMEMFilename,
GDAL_OF_INTERNAL | GDAL_OF_RASTER,
aosAllowedDrivers.List()));
if (poTileDS)
poTileDS->MarkSuppressOnClose();
else
VSIUnlink(osMEMFilename);
}
else if (bDownloadWholeMetaTile ||
(!STARTS_WITH(osURL, "http://") &&
!STARTS_WITH(osURL, "https://")))
{
aosAllowedDrivers.AddString("HTTP");
if (m_poMasterDS->m_bSkipMissingMetaTile)
CPLPushErrorHandler(CPLQuietErrorHandler);
poTileDS =
std::unique_ptr<GDALDataset>(GDALDataset::Open(
osURL, GDAL_OF_INTERNAL | GDAL_OF_RASTER,
aosAllowedDrivers.List()));
if (m_poMasterDS->m_bSkipMissingMetaTile)
CPLPopErrorHandler();
}
else
{
if (m_poMasterDS->m_bSkipMissingMetaTile)
CPLPushErrorHandler(CPLQuietErrorHandler);
poTileDS = std::unique_ptr<GDALDataset>(
GDALDataset::Open(("/vsicurl/" + osURL).c_str(),
GDAL_OF_INTERNAL | GDAL_OF_RASTER,
aosAllowedDrivers.List()));
if (m_poMasterDS->m_bSkipMissingMetaTile)
CPLPopErrorHandler();
}
if (poTileDS == nullptr)
{
if (m_poMasterDS->m_bSkipMissingMetaTile)
{
m_poMasterDS->m_oCacheTileDS.insert(
osURL, std::move(poTileDS));
bMissingTile = true;
break;
}
CPLError(CE_Failure, CPLE_OpenFailed, "Cannot open %s",
osURL.c_str());
return CE_Failure;
}
ppoTileDS = &m_poMasterDS->m_oCacheTileDS.insert(
osURL, std::move(poTileDS));
}
std::unique_ptr<GDALDataset> &poTileDS = *ppoTileDS;
if (poTileDS == nullptr)
{
bMissingTile = true;
break;
}
GDALRasterIOExtraArg sExtraArgs;
INIT_RASTERIO_EXTRA_ARG(sExtraArgs);
if (bRequestFitsInSingleMetaTile)
{
sExtraArgs.eResampleAlg = psExtraArg->eResampleAlg;
if (psExtraArg->bFloatingPointWindowValidity)
{
sExtraArgs.bFloatingPointWindowValidity = true;
sExtraArgs.dfXOff =
psExtraArg->dfXOff - iX * m_nMetaTileWidth;
sExtraArgs.dfYOff =
psExtraArg->dfYOff - iY * m_nMetaTileHeight;
sExtraArgs.dfXSize = psExtraArg->dfXSize;
sExtraArgs.dfYSize = psExtraArg->dfYSize;
}
}
CPLDebugOnly("STACTA", "Reading %d,%d,%d,%d in %s", nTileXOff,
nTileYOff, nTileXSize, nTileYSize, osURL.c_str());
if (poTileDS->RasterIO(
GF_Read, nTileXOff, nTileYOff, nTileXSize, nTileYSize,
static_cast<GByte *>(pData) + nBufXOff * nPixelSpace +
nBufYOff * nLineSpace,
nBufXSizeEffective, nBufYSizeEffective, eBufType,
nBandCount, panBandMap, nPixelSpace, nLineSpace,
nBandSpace, &sExtraArgs) != CE_None)
{
return CE_Failure;
}
} while (false);
if (bMissingTile)
{
CPLDebugOnly("STACTA", "Missing metatile %s", osURL.c_str());
for (int iBand = 0; iBand < nBandCount; iBand++)
{
int bHasNoData = FALSE;
double dfNodata = GetRasterBand(panBandMap[iBand])
->GetNoDataValue(&bHasNoData);
if (!bHasNoData)
dfNodata = 0;
for (int nYBufOff = 0; nYBufOff < nBufYSizeEffective;
nYBufOff++)
{
GByte *pabyDest = static_cast<GByte *>(pData) +
iBand * nBandSpace +
nBufXOff * nPixelSpace +
(nBufYOff + nYBufOff) * nLineSpace;
GDALCopyWords(&dfNodata, GDT_Float64, 0, pabyDest,
eBufType, static_cast<int>(nPixelSpace),
nBufXSizeEffective);
}
}
}
if (iX == nMinBlockX)
{
nBufXOff = m_nMetaTileWidth -
std::max(0, nXOff - nMinBlockX * m_nMetaTileWidth);
}
else
{
nBufXOff += m_nMetaTileWidth;
}
}
if (iY == nMinBlockY)
{
nBufYOff = m_nMetaTileHeight -
std::max(0, nYOff - nMinBlockY * m_nMetaTileHeight);
}
else
{
nBufYOff += m_nMetaTileHeight;
}
}
return CE_None;
}
/************************************************************************/
/* GetGeoTransform() */
/************************************************************************/
CPLErr STACTARawDataset::GetGeoTransform(double *padfGeoTransform)
{
memcpy(padfGeoTransform, &m_adfGeoTransform[0], 6 * sizeof(double));
return CE_None;
}
/************************************************************************/
/* Identify() */
/************************************************************************/
int STACTADataset::Identify(GDALOpenInfo *poOpenInfo)
{
if (STARTS_WITH(poOpenInfo->pszFilename, "STACTA:"))
{
return true;
}
if (
#ifndef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
!EQUAL(CPLGetExtension(poOpenInfo->pszFilename), "json") ||
#endif
poOpenInfo->nHeaderBytes == 0)
{
return false;
}
for (int i = 0; i < 2; i++)
{
// TryToIngest() may reallocate pabyHeader, so do not move this
// before the loop.
const char *pszHeader =
reinterpret_cast<const char *>(poOpenInfo->pabyHeader);
if (strstr(pszHeader, "\"stac_extensions\"") != nullptr &&
(strstr(pszHeader, "\"tiled-assets\"") != nullptr ||
strstr(pszHeader,
"https://stac-extensions.github.io/tiled-assets/") !=
nullptr))
{
return true;
}
if (i == 0)
{
// Should be enough for a STACTA .json file
poOpenInfo->TryToIngest(32768);
}
}
return false;
}
/************************************************************************/
/* Open() */
/************************************************************************/
bool STACTADataset::Open(GDALOpenInfo *poOpenInfo)
{
CPLString osFilename(poOpenInfo->pszFilename);
CPLString osAssetName;
CPLString osTMS;
if (STARTS_WITH(poOpenInfo->pszFilename, "STACTA:"))
{
const CPLStringList aosTokens(CSLTokenizeString2(
poOpenInfo->pszFilename, ":", CSLT_HONOURSTRINGS));
if (aosTokens.size() != 2 && aosTokens.size() != 3 &&
aosTokens.size() != 4)
return false;
osFilename = aosTokens[1];
if (aosTokens.size() >= 3)
osAssetName = aosTokens[2];
if (aosTokens.size() == 4)
osTMS = aosTokens[3];
}
CPLJSONDocument oDoc;
if (STARTS_WITH(osFilename, "http://") ||
STARTS_WITH(osFilename, "https://"))
{
if (!oDoc.LoadUrl(osFilename, nullptr))
return false;
}
else
{
if (!oDoc.Load(osFilename))
return false;
}
const auto oRoot = oDoc.GetRoot();
const auto oProperties = oRoot["properties"];
if (!oProperties.IsValid() ||
oProperties.GetType() != CPLJSONObject::Type::Object)
{
CPLError(CE_Failure, CPLE_AppDefined, "Missing properties");
return false;
}
const auto oAssetTemplates = oRoot["asset_templates"];
if (!oAssetTemplates.IsValid() ||
oAssetTemplates.GetType() != CPLJSONObject::Type::Object)
{
CPLError(CE_Failure, CPLE_AppDefined, "Missing asset_templates");
return false;
}
const auto aoAssetTemplates = oAssetTemplates.GetChildren();
if (aoAssetTemplates.size() == 0)
{
CPLError(CE_Failure, CPLE_AppDefined, "Empty asset_templates");
return false;
}
const auto oTMSs = oProperties.GetObj("tiles:tile_matrix_sets");
if (!oTMSs.IsValid() || oTMSs.GetType() != CPLJSONObject::Type::Object)
{
CPLError(CE_Failure, CPLE_AppDefined,
"Missing properties[\"tiles:tile_matrix_sets\"]");
return false;
}
const auto aoTMSs = oTMSs.GetChildren();
if (aoTMSs.empty())
{
CPLError(CE_Failure, CPLE_AppDefined,
"Empty properties[\"tiles:tile_matrix_sets\"]");
return false;
}
if ((aoAssetTemplates.size() >= 2 || aoTMSs.size() >= 2) &&
osAssetName.empty() && osTMS.empty())
{
int nSDSCount = 0;
for (const auto &oAssetTemplate : aoAssetTemplates)
{
const CPLString osAssetNameSubDS = oAssetTemplate.GetName();
const char *pszAssetNameSubDS = osAssetNameSubDS.c_str();
if (aoTMSs.size() >= 2)
{
for (const auto &oTMS : aoTMSs)
{
const CPLString osTMSSubDS = oTMS.GetName();
const char *pszTMSSubDS = osTMSSubDS.c_str();
GDALDataset::SetMetadataItem(
CPLSPrintf("SUBDATASET_%d_NAME", nSDSCount + 1),
CPLSPrintf("STACTA:\"%s\":%s:%s", osFilename.c_str(),
pszAssetNameSubDS, pszTMSSubDS),
"SUBDATASETS");
GDALDataset::SetMetadataItem(
CPLSPrintf("SUBDATASET_%d_DESC", nSDSCount + 1),
CPLSPrintf("Asset %s, tile matrix set %s",
pszAssetNameSubDS, pszTMSSubDS),
"SUBDATASETS");
nSDSCount++;
}
}
else
{
GDALDataset::SetMetadataItem(
CPLSPrintf("SUBDATASET_%d_NAME", nSDSCount + 1),
CPLSPrintf("STACTA:\"%s\":%s", osFilename.c_str(),
pszAssetNameSubDS),
"SUBDATASETS");
GDALDataset::SetMetadataItem(
CPLSPrintf("SUBDATASET_%d_DESC", nSDSCount + 1),
CPLSPrintf("Asset %s", pszAssetNameSubDS), "SUBDATASETS");
nSDSCount++;
}
}
return true;
}
if (osAssetName.empty())
{
osAssetName = aoAssetTemplates[0].GetName();
}
const auto oAssetTemplate = oAssetTemplates.GetObj(osAssetName);
if (!oAssetTemplate.IsValid() ||
oAssetTemplate.GetType() != CPLJSONObject::Type::Object)
{
CPLError(CE_Failure, CPLE_AppDefined,
"Cannot find asset_templates[\"%s\"]", osAssetName.c_str());
return false;
}
if (osTMS.empty())
{
osTMS = aoTMSs[0].GetName();
}
const auto oTMS = oTMSs.GetObj(osTMS);
if (!oTMS.IsValid() || oTMS.GetType() != CPLJSONObject::Type::Object)
{
CPLError(CE_Failure, CPLE_AppDefined,
"Cannot find properties[\"tiles:tile_matrix_sets\"][\"%s\"]",
osTMS.c_str());
return false;
}
auto poTMS = gdal::TileMatrixSet::parse(
oTMS.Format(CPLJSONObject::PrettyFormat::Plain).c_str());
if (poTMS == nullptr)
return false;
CPLString osURLTemplate = oAssetTemplate.GetString("href");
if (osURLTemplate.empty())
{
CPLError(CE_Failure, CPLE_AppDefined,
"Cannot find asset_templates[\"%s\"][\"href\"]",
osAssetName.c_str());
}
osURLTemplate.replaceAll("{TileMatrixSet}", osTMS);
if (STARTS_WITH(osURLTemplate, "file://"))
{
osURLTemplate = osURLTemplate.substr(strlen("file://"));
}
else if (STARTS_WITH(osURLTemplate, "s3://"))
{
osURLTemplate = "/vsis3/" + osURLTemplate.substr(strlen("s3://"));
}
if (!STARTS_WITH(osURLTemplate, "http://") &&
!STARTS_WITH(osURLTemplate, "https://"))
{
if (STARTS_WITH(osURLTemplate, "./"))
osURLTemplate = osURLTemplate.substr(2);
osURLTemplate = CPLProjectRelativeFilename(CPLGetDirname(osFilename),
osURLTemplate);
}
// Parse optional tile matrix set limits
std::map<CPLString, Limits> oMapLimits;
const auto oTMLinks = oProperties.GetObj("tiles:tile_matrix_links");
if (oTMLinks.IsValid())
{
if (oTMLinks.GetType() != CPLJSONObject::Type::Object)
{
CPLError(
CE_Failure, CPLE_AppDefined,
"Invalid type for properties[\"tiles:tile_matrix_links\"]");
return false;
}
auto oLimits = oTMLinks[osTMS]["limits"];
if (oLimits.IsValid() &&
oLimits.GetType() == CPLJSONObject::Type::Object)
{
for (const auto &oLimit : oLimits.GetChildren())
{
Limits limits;
limits.min_tile_col = oLimit.GetInteger("min_tile_col");
limits.max_tile_col = oLimit.GetInteger("max_tile_col");
limits.min_tile_row = oLimit.GetInteger("min_tile_row");
limits.max_tile_row = oLimit.GetInteger("max_tile_row");
oMapLimits[oLimit.GetName()] = limits;
}
}
}
const auto &tmsList = poTMS->tileMatrixList();
if (tmsList.empty())
return false;
m_bSkipMissingMetaTile = CPLTestBool(CSLFetchNameValueDef(
poOpenInfo->papszOpenOptions, "SKIP_MISSING_METATILE",
CPLGetConfigOption("GDAL_STACTA_SKIP_MISSING_METATILE", "NO")));
// STAC 1.1 uses bands instead of eo:bands and raster:bands
const auto oBands = oAssetTemplate.GetArray("bands");
// Check if there are both eo:bands and raster:bands extension
// If so, we don't need to fetch a prototype metatile to derive the
// information we need (number of bands, data type and nodata value)
const auto oEoBands =
oBands.IsValid() ? oBands : oAssetTemplate.GetArray("eo:bands");
const auto oRasterBands =
oBands.IsValid() ? oBands : oAssetTemplate.GetArray("raster:bands");
std::vector<GDALDataType> aeDT;
std::vector<double> adfNoData;
std::vector<bool> abSetNoData;
int nExpectedBandCount = 0;
if (oRasterBands.IsValid())
{
if (oEoBands.IsValid() && oEoBands.Size() != oRasterBands.Size())
{
CPLError(CE_Warning, CPLE_AppDefined,
"Number of bands in eo:bands and raster:bands is not "
"identical. Ignoring the later");
}
else
{
nExpectedBandCount = oRasterBands.Size();
const struct
{
const char *pszStacDataType;
GDALDataType eGDALDataType;
} aDataTypeMapping[] = {
{"int8", GDT_Int8},
{"int16", GDT_Int16},
{"int32", GDT_Int32},
{"int64", GDT_Int64},
{"uint8", GDT_Byte},
{"uint16", GDT_UInt16},
{"uint32", GDT_UInt32},
{"uint64", GDT_UInt64},
// float16: 16-bit float; unhandled
{"float32", GDT_Float32},
{"float64", GDT_Float64},
{"cint16", GDT_CInt16},
{"cint32", GDT_CInt32},
{"cfloat32", GDT_CFloat32},
{"cfloat64", GDT_CFloat64},
};
for (int i = 0; i < nExpectedBandCount; ++i)
{
if (oRasterBands[i].GetType() != CPLJSONObject::Type::Object)
{
CPLError(CE_Failure, CPLE_AppDefined,
"Wrong raster:bands[%d]", i);
return false;
}
const std::string osDataType =
oRasterBands[i].GetString("data_type");
GDALDataType eDT = GDT_Unknown;
for (const auto &oTuple : aDataTypeMapping)
{
if (osDataType == oTuple.pszStacDataType)
{
eDT = oTuple.eGDALDataType;
break;
}
}
if (eDT == GDT_Unknown)
{
CPLError(CE_Failure, CPLE_AppDefined,
"Wrong raster:bands[%d].data_type = %s", i,
osDataType.c_str());
return false;
}
aeDT.push_back(eDT);
const auto oNoData = oRasterBands[i].GetObj("nodata");
if (oNoData.GetType() == CPLJSONObject::Type::String)
{
const std::string osNoData = oNoData.ToString();
if (osNoData == "inf")
{
abSetNoData.push_back(true);
adfNoData.push_back(
std::numeric_limits<double>::infinity());
}
else if (osNoData == "-inf")
{
abSetNoData.push_back(true);
adfNoData.push_back(
-std::numeric_limits<double>::infinity());
}
else if (osNoData == "nan")
{
abSetNoData.push_back(true);
adfNoData.push_back(
std::numeric_limits<double>::quiet_NaN());
}
else
{
CPLError(CE_Warning, CPLE_AppDefined,
"Invalid raster:bands[%d].nodata = %s", i,
osNoData.c_str());