void TestDicomSampleImage(const char* name)
{
std::vector<BYTE> data;
bool success = ReadFile(name, &data, 9);
Assert::IsTrue(success);
BYTE pixeldataStart[] = { 0x00, 0x00, 0x01, 0x00, 0xFF, 0xD8, 0xFF, 0xF7 };
int offset = findstring(data, pixeldataStart, COUNT(pixeldataStart));
data.erase(data.begin(), data.begin() + offset - 4);
// remove the dicom fragment headers (in the concerned images they occur every 64k)
for (unsigned int i = 0; i < data.size(); i+= 64 * 1024)
{
data.erase(data.begin() + i, data.begin() + i + 8);
}
JlsParameters info;
auto error = JpegLsReadHeader(&data[0], data.size(), &info, nullptr);
// 0xFE, 0xFF, 0x00, 0xE0, 0x00, 0x00, 0x01, 0x00
std::vector<BYTE> dataUnc;
dataUnc.resize(info.bytesperline * info.height);
error = JpegLsDecode(&dataUnc[0], dataUnc.size(), &data[0], data.size(), nullptr, nullptr);
Assert::IsTrue(error == charls::ApiResult::OK);
std::cout << ".";
}
CHARLS_IMEXPORT JLS_ERROR JpegLsVerifyEncode(const void* pdataUncompressed, size_t cbyteUncompressed, const void* pdataCompressed, size_t cbyteBuffer)
{
JlsParamaters params = JlsParamaters();
JLS_ERROR error = JpegLsReadHeader(pdataCompressed, cbyteBuffer, ¶ms);
if (error != OK)
return error;
error = CheckInput(pdataCompressed, cbyteBuffer, pdataUncompressed, cbyteUncompressed, ¶ms);
if (error != OK)
return error;
Size size = Size(params.width, params.height);
LONG cbit = params.bitspersample;
JLSOutputStream stream;
stream.Init(size, params.bitspersample, params.components);
if (params.ilv == ILV_NONE)
{
LONG cbyteComp = size.cx*size.cy*((cbit +7)/8);
for (LONG icomp = 0; icomp < params.components; ++icomp)
{
const BYTE* pbyteComp = static_cast<const BYTE*>(pdataUncompressed) + icomp*cbyteComp;
stream.AddScan(pbyteComp, ¶ms);
}
}
else
{
stream.AddScan(pdataUncompressed, ¶ms);
}
std::vector<BYTE> rgbyteCompressed;
rgbyteCompressed.resize(cbyteBuffer + 16);
memcpy(&rgbyteCompressed[0], pdataCompressed, cbyteBuffer);
stream.EnableCompare(true);
stream.Write(&rgbyteCompressed[0], cbyteBuffer);
return OK;
}
CHARLS_IMEXPORT(JLS_ERROR) JpegLsVerifyEncode(const void* uncompressedData, size_t uncompressedLength, const void* compressedData, size_t compressedLength)
{
JlsParameters info = JlsParameters();
JLS_ERROR error = JpegLsReadHeader(compressedData, compressedLength, &info);
if (error != OK)
return error;
ByteStreamInfo rawStreamInfo = FromByteArray(uncompressedData, uncompressedLength);
error = CheckInput(compressedData, compressedLength, rawStreamInfo, &info);
if (error != OK)
return error;
Size size = Size(info.width, info.height);
JLSOutputStream stream;
stream.Init(size, info.bitspersample, info.components);
if (info.ilv == ILV_NONE)
{
LONG fieldLength = size.cx*size.cy*((info.bitspersample +7)/8);
for (LONG component = 0; component < info.components; ++component)
{
stream.AddScan(rawStreamInfo, &info);
SkipBytes(&rawStreamInfo, fieldLength);
}
}
else
{
stream.AddScan(rawStreamInfo, &info);
}
std::vector<BYTE> rgbyteCompressed(compressedLength + 16);
memcpy(&rgbyteCompressed[0], compressedData, compressedLength);
stream.EnableCompare(true);
stream.Write(&rgbyteCompressed[0], rgbyteCompressed.size());
return OK;
}
CHARLS_IMEXPORT(JLS_ERROR) JpegLsVerifyEncode(const void* uncompressedData, size_t uncompressedLength, const void* compressedData, size_t compressedLength)
{
JlsParameters info = JlsParameters();
JLS_ERROR error = JpegLsReadHeader(compressedData, compressedLength, &info);
if (error != OK)
return error;
error = CheckInput(compressedData, compressedLength, uncompressedData, uncompressedLength, &info);
if (error != OK)
return error;
Size size = Size(info.width, info.height);
JLSOutputStream stream;
stream.Init(size, info.bitspersample, info.components);
if (info.ilv == ILV_NONE)
{
LONG cbyteComp = size.cx*size.cy*((info.bitspersample +7)/8);
for (LONG component = 0; component < info.components; ++component)
{
const BYTE* compareData = static_cast<const BYTE*>(uncompressedData) + component*cbyteComp;
stream.AddScan(compareData, &info);
}
}
else
{
stream.AddScan(uncompressedData, &info);
}
std::vector<BYTE> rgbyteCompressed(compressedLength + 16);
memcpy(&rgbyteCompressed[0], compressedData, compressedLength);
stream.EnableCompare(true);
stream.Write(&rgbyteCompressed[0], compressedLength);
return OK;
}
GDALDataset *JPEGLSDataset::Open( GDALOpenInfo * poOpenInfo )
{
int bIsDCOM;
if (!Identify(poOpenInfo, bIsDCOM))
return NULL;
JlsParameters sParams;
JLS_ERROR eError;
int nOffset = 0;
if (!bIsDCOM)
{
eError = JpegLsReadHeader(poOpenInfo->pabyHeader,
poOpenInfo->nHeaderBytes, &sParams);
}
else
{
VSILFILE* fp = VSIFOpenL(poOpenInfo->pszFilename, "rb");
if (fp == NULL)
return NULL;
GByte abyBuffer[1028];
GByte abySignature[] = { 0xFF, 0xD8, 0xFF, 0xF7 };
while( true )
{
if (VSIFReadL(abyBuffer, 1, 1028, fp) != 1028)
{
VSIFCloseL(fp);
return NULL;
}
int i;
for(i=0; i<1024; i++)
{
if (memcmp(abyBuffer + i, abySignature, 4) == 0)
{
nOffset += i;
break;
}
}
if (i != 1024)
break;
nOffset += 1024;
VSIFSeekL(fp, nOffset, SEEK_SET);
}
VSIFSeekL(fp, nOffset, SEEK_SET);
VSIFReadL(abyBuffer, 1, 1024, fp);
eError = JpegLsReadHeader(abyBuffer, 1024, &sParams);
VSIFCloseL(fp);
if (eError == OK)
{
CPLDebug("JPEGLS", "JPEGLS image found at offset %d", nOffset);
}
}
if (eError != OK)
{
CPLError(CE_Failure, CPLE_AppDefined,
"Cannot read header : %s",
JPEGLSGetErrorAsString(eError));
return NULL;
}
if (sParams.bitspersample > 16)
{
CPLError(CE_Failure, CPLE_NotSupported,
"Unsupport bitspersample : %d",
sParams.bitspersample);
return NULL;
}
/* -------------------------------------------------------------------- */
/* Create a corresponding GDALDataset. */
/* -------------------------------------------------------------------- */
JPEGLSDataset *poDS;
int iBand;
poDS = new JPEGLSDataset();
poDS->osFilename = poOpenInfo->pszFilename;
poDS->nRasterXSize = sParams.width;
poDS->nRasterYSize = sParams.height;
poDS->nBands = sParams.components;
poDS->nBitsPerSample = sParams.bitspersample;
poDS->nOffset = nOffset;
/* -------------------------------------------------------------------- */
/* Create band information objects. */
/* -------------------------------------------------------------------- */
for( iBand = 1; iBand <= poDS->nBands; iBand++ )
{
poDS->SetBand( iBand, new JPEGLSRasterBand( poDS, iBand) );
if (poDS->nBitsPerSample != 8 && poDS->nBitsPerSample != 16)
{
poDS->GetRasterBand(iBand)->SetMetadataItem( "NBITS",
CPLString().Printf( "%d", poDS->nBitsPerSample ),
"IMAGE_STRUCTURE" );
}
}
/* -------------------------------------------------------------------- */
/* Initialize any PAM information. */
/* -------------------------------------------------------------------- */
poDS->SetDescription( poOpenInfo->pszFilename );
poDS->TryLoadXML();
/* -------------------------------------------------------------------- */
/* Check for overviews. */
/* -------------------------------------------------------------------- */
poDS->oOvManager.Initialize( poDS, poOpenInfo->pszFilename );
return( poDS );
}
