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rmfjpeg.cpp
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/******************************************************************************
*
* Project: Raster Matrix Format
* Purpose: Implementation of the JPEG decompression algorithm as used in
* GIS "Panorama" raster files.
* Author: Andrew Sudorgin (drons [a] list dot ru)
*
******************************************************************************
* Copyright (c) 2018, Andrew Sudorgin
*
* 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.
****************************************************************************/
#ifdef HAVE_LIBJPEG
#include <algorithm>
#include "cpl_conv.h"
#include "rmfdataset.h"
#include "../mem/memdataset.h"
/************************************************************************/
/* JPEGDecompress() */
/************************************************************************/
size_t RMFDataset::JPEGDecompress(const GByte *pabyIn, GUInt32 nSizeIn,
GByte *pabyOut, GUInt32 nSizeOut,
GUInt32 nRawXSize, GUInt32 nRawYSize)
{
if (pabyIn == nullptr || pabyOut == nullptr || nSizeOut < nSizeIn ||
nSizeIn < 2)
return 0;
CPLString osTmpFilename;
VSILFILE *fp;
osTmpFilename.Printf("/vsimem/rmfjpeg/%p.jpg", pabyIn);
fp = VSIFileFromMemBuffer(osTmpFilename, const_cast<GByte *>(pabyIn),
nSizeIn, FALSE);
if (fp == nullptr)
{
CPLError(CE_Failure, CPLE_AppDefined, "RMF JPEG: Can't create %s file",
osTmpFilename.c_str());
return 0;
}
const char *apszAllowedDrivers[] = {"JPEG", nullptr};
GDALDatasetH hTile;
CPLConfigOptionSetter oNoReadDir("GDAL_DISABLE_READDIR_ON_OPEN",
"EMPTY_DIR", false);
hTile = GDALOpenEx(osTmpFilename, GDAL_OF_RASTER | GDAL_OF_INTERNAL,
apszAllowedDrivers, nullptr, nullptr);
if (hTile == nullptr)
{
CPLError(CE_Failure, CPLE_AppDefined, "RMF JPEG: Can't open %s file",
osTmpFilename.c_str());
VSIFCloseL(fp);
VSIUnlink(osTmpFilename);
return 0;
}
if (GDALGetRasterCount(hTile) != RMF_JPEG_BAND_COUNT)
{
CPLError(CE_Failure, CPLE_AppDefined,
"RMF JPEG: Invalid band count %d in tile, must be %d",
GDALGetRasterCount(hTile), (int)RMF_JPEG_BAND_COUNT);
GDALClose(hTile);
VSIFCloseL(fp);
VSIUnlink(osTmpFilename);
return 0;
}
int nBandCount = GDALGetRasterCount(hTile);
int nImageWidth =
std::min(GDALGetRasterXSize(hTile), static_cast<int>(nRawXSize));
int nImageHeight =
std::min(GDALGetRasterYSize(hTile), static_cast<int>(nRawYSize));
if (nRawXSize * nBandCount * nImageHeight > nSizeOut)
{
CPLError(CE_Failure, CPLE_AppDefined,
"RMF JPEG: Too small output buffer");
GDALClose(hTile);
VSIFCloseL(fp);
VSIUnlink(osTmpFilename);
return 0;
}
CPLErr eErr;
size_t nRet;
int aBandMap[RMF_JPEG_BAND_COUNT] = {3, 2, 1};
eErr = GDALDatasetRasterIO(hTile, GF_Read, 0, 0, nImageWidth, nImageHeight,
pabyOut, nImageWidth, nImageHeight, GDT_Byte,
nBandCount, aBandMap, nBandCount,
nRawXSize * nBandCount, 1);
if (CE_None != eErr)
{
CPLError(CE_Failure, CPLE_AppDefined,
"RMF JPEG: Error decompress JPEG tile");
nRet = 0;
}
else
{
nRet = static_cast<size_t>(nRawXSize * nBandCount * nImageHeight);
}
GDALClose(hTile);
VSIFCloseL(fp);
VSIUnlink(osTmpFilename);
return nRet;
}
/************************************************************************/
/* JPEGCompress() */
/************************************************************************/
size_t RMFDataset::JPEGCompress(const GByte *pabyIn, GUInt32 nSizeIn,
GByte *pabyOut, GUInt32 nSizeOut,
GUInt32 nRawXSize, GUInt32 nRawYSize,
const RMFDataset *poDS)
{
if (pabyIn == nullptr || pabyOut == nullptr || nSizeIn < 2)
return 0;
GDALDriverH hJpegDriver = GDALGetDriverByName("JPEG");
if (hJpegDriver == nullptr)
{
CPLError(CE_Failure, CPLE_AppDefined, "RMF: JPEG driver not found");
return 0;
}
const GDALDataType eType = GDT_Byte;
auto poMemDS = std::unique_ptr<MEMDataset>(
MEMDataset::Create("", nRawXSize, nRawYSize, 0, eType, nullptr));
for (int iBand = 0; iBand < RMF_JPEG_BAND_COUNT; ++iBand)
{
const GByte *pabyBand = pabyIn + (RMF_JPEG_BAND_COUNT - iBand - 1);
auto hBand = MEMCreateRasterBandEx(
poMemDS.get(), iBand + 1, const_cast<GByte *>(pabyBand), eType, 3,
nRawXSize * RMF_JPEG_BAND_COUNT, false);
poMemDS->AddMEMBand(hBand);
}
CPLString osTmpFilename;
osTmpFilename.Printf("/vsimem/rmfjpeg/%p.jpg", pabyIn);
char szQuality[32] = {};
if (poDS != nullptr && poDS->sHeader.iJpegQuality > 0)
{
snprintf(szQuality, sizeof(szQuality), "QUALITY=%d",
(int)poDS->sHeader.iJpegQuality);
}
else
{
snprintf(szQuality, sizeof(szQuality), "QUALITY=75");
}
char *apszJpegOptions[2] = {szQuality, nullptr};
GDALDatasetH hJpeg =
GDALCreateCopy(hJpegDriver, osTmpFilename, poMemDS.get(), 0,
apszJpegOptions, nullptr, nullptr);
poMemDS.reset();
if (hJpeg == nullptr)
{
CPLError(CE_Failure, CPLE_AppDefined,
"RMF JPEG: Error compress JPEG tile");
VSIUnlink(osTmpFilename);
return 0;
}
GDALClose(hJpeg);
vsi_l_offset nDataLength = 0;
GByte *pabyBuffer = VSIGetMemFileBuffer(osTmpFilename, &nDataLength, TRUE);
if (nDataLength < nSizeOut)
{
memcpy(pabyOut, pabyBuffer, static_cast<size_t>(nDataLength));
CPLFree(pabyBuffer);
return static_cast<size_t>(nDataLength);
}
CPLFree(pabyBuffer);
return 0;
}
#endif // HAVE_LIBJPEG