// PHOTOMETRIC == MULTISPECTRAL turns off YCbCr conversion and downsampling
JPEG_Band::JPEG_Band( GDALMRFDataset *pDS, const ILImage &image,
int b, int level ) :
GDALMRFRasterBand(pDS, image, b, int(level)),
codec(image)
{
const int nbands = image.pagesize.c;
// Check behavior on signed 16bit. Does the libjpeg sign extend?
#if defined(LIBJPEG_12_H)
if (GDT_Byte != image.dt && GDT_UInt16 != image.dt)
#else
if (GDT_Byte != image.dt)
#endif
{
CPLError(CE_Failure, CPLE_NotSupported,
"Data type not supported by MRF JPEG");
return;
}
if( nbands == 3 )
{ // Only the 3 band JPEG has storage flavors
CPLString const &pm = pDS->GetPhotometricInterpretation();
if (pm == "RGB" || pm == "MULTISPECTRAL")
{ // Explicit RGB or MS
codec.rgb = TRUE;
codec.sameres = TRUE;
}
if (pm == "YCC")
codec.sameres = TRUE;
}
if( GDT_Byte == image.dt )
codec.optimize = GetOptlist().FetchBoolean("OPTIMIZE", FALSE) != FALSE;
else
codec.optimize = true; // Required for 12bit
}
LERC_Band::LERC_Band(GDALMRFDataset *pDS, const ILImage &image, int b, int level):
GDALMRFRasterBand(pDS, image, b, level)
{
// Pick 1/1000 for floats and 0.5 losless for integers
if (eDataType == GDT_Float32 || eDataType == GDT_Float64 )
precision = strtod(GetOptionValue( "LERC_PREC" , ".001" ),NULL);
else
precision = std::max(0.5, strtod(GetOptionValue("LERC_PREC", ".5"), NULL));
// Encode in V2 by default
version = GetOptlist().FetchBoolean("V1", FALSE) ? 1:2;
// Enlarge the page buffer in this case, LERC may expand data
pDS->SetPBufferSize( 2 * image.pageSizeBytes);
}