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/*=========================================================================
Program: GDCM (Grassroots DICOM). A DICOM library
Copyright (c) 2006-2011 Mathieu Malaterre
All rights reserved.
See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "gdcmRAWCodec.h"
#include "gdcmTransferSyntax.h"
#include "gdcmByteSwap.txx"
#include "gdcmDataElement.h"
#include "gdcmSequenceOfFragments.h"
#include "gdcmUnpacker12Bits.h"
#include <limits>
#include <sstream>
#include <cstring>
namespace gdcm
{
class RAWInternals
{
public:
};
RAWCodec::RAWCodec()
{
Internals = new RAWInternals;
}
RAWCodec::~RAWCodec()
{
delete Internals;
}
bool RAWCodec::CanCode(TransferSyntax const &ts) const
{
return ts == TransferSyntax::ImplicitVRLittleEndian
|| ts == TransferSyntax::ExplicitVRLittleEndian
|| ts == TransferSyntax::ExplicitVRBigEndian
|| ts == TransferSyntax::ImplicitVRBigEndianPrivateGE
|| ts == TransferSyntax::DeflatedExplicitVRLittleEndian;
}
bool RAWCodec::CanDecode(TransferSyntax const &ts) const
{
return ts == TransferSyntax::ImplicitVRLittleEndian
|| ts == TransferSyntax::ExplicitVRLittleEndian
|| ts == TransferSyntax::ExplicitVRBigEndian
|| ts == TransferSyntax::ImplicitVRBigEndianPrivateGE
|| ts == TransferSyntax::DeflatedExplicitVRLittleEndian;
}
bool RAWCodec::Code(DataElement const &in, DataElement &out)
{
out = in;
//assert(0);
return true;
}
bool RAWCodec::DecodeBytes(const char* inBytes, size_t inBufferLength,
char* outBytes, size_t inOutBufferLength)
{
// First let's see if we can do a fast-path:
if( !NeedByteSwap &&
!RequestPaddedCompositePixelCode &&
// PI == PhotometricInterpretation::MONOCHROME2 &&
/*!PlanarConfiguration &&*/ !RequestPlanarConfiguration &&
GetPixelFormat().GetBitsAllocated() != 12 &&
!NeedOverlayCleanup )
{
assert( !NeedOverlayCleanup );
assert( PI != PhotometricInterpretation::YBR_PARTIAL_422 );
assert( PI != PhotometricInterpretation::YBR_PARTIAL_420 );
assert( PI != PhotometricInterpretation::YBR_ICT );
assert( this->GetPixelFormat() != PixelFormat::UINT12 );
assert( this->GetPixelFormat() != PixelFormat::INT12 );
// DermaColorLossLess.dcm
//assert(inBufferLength == inOutBufferLength || inBufferLength == inOutBufferLength + 1);
// What if the user request a subportion of the image:
// this happen in the case of MOSAIC image, where we are only interested in the non-zero
// pixel of the tiled image.
// removal of this assert also solve an issue with: SIEMENS_GBS_III-16-ACR_NEMA_1.acr
// where we need to discard trailing pixel data bytes.
if( inOutBufferLength <= inBufferLength )
{
memcpy(outBytes, inBytes, inOutBufferLength);
}
else
{
gdcmWarningMacro( "Requesting too much data. Truncating result" );
memcpy(outBytes, inBytes, inBufferLength);
}
return true;
}
// else
assert( inBytes );
assert( outBytes );
std::stringstream is;
is.write(inBytes, inBufferLength);
std::stringstream os;
bool r = DecodeByStreams(is, os);
assert( r );
if(!r) return false;
std::string str = os.str();
//std::string::size_type check = str.size();//unused
if( this->GetPixelFormat() == PixelFormat::UINT12 ||
this->GetPixelFormat() == PixelFormat::INT12 )
{
size_t len = str.size() * 16 / 12;
char * copy = new char[len];
bool b = Unpacker12Bits::Unpack(copy, &str[0], str.size() ); (void)b;
assert( b );
assert (len == inOutBufferLength);
assert(inOutBufferLength == len);
memcpy(outBytes, copy, len);
delete[] copy;
this->GetPixelFormat().SetBitsAllocated( 16 );
}
else
{
// DermaColorLossLess.dcm
//assert (check == inOutBufferLength || check == inOutBufferLength + 1);
// problem with: SIEMENS_GBS_III-16-ACR_NEMA_1.acr
memcpy(outBytes, str.c_str(), inOutBufferLength);
}
return r;
}
bool RAWCodec::Decode(DataElement const &in, DataElement &out)
{
// First let's see if we can do a fast-path:
if( !NeedByteSwap &&
!RequestPaddedCompositePixelCode &&
PI == PhotometricInterpretation::MONOCHROME2 &&
!PlanarConfiguration && !RequestPlanarConfiguration &&
GetPixelFormat().GetBitsAllocated() != 12 &&
!NeedOverlayCleanup )
{
assert( this->GetPixelFormat() != PixelFormat::UINT12 );
assert( this->GetPixelFormat() != PixelFormat::INT12 );
out = in;
return true;
}
// else
const ByteValue *bv = in.GetByteValue();
assert( bv );
std::stringstream is;
is.write(bv->GetPointer(), bv->GetLength());
std::stringstream os;
bool r = DecodeByStreams(is, os);
if(!r) return false;
assert( r );
std::string str = os.str();
//std::string::size_type check = str.size();
out = in;
if( this->GetPixelFormat() == PixelFormat::UINT12 ||
this->GetPixelFormat() == PixelFormat::INT12 )
{
size_t len = str.size() * 16 / 12;
char * copy = new char[len];//why use an array, and not a vector?
bool b = Unpacker12Bits::Unpack(copy, &str[0], str.size() );
assert( b );
(void)b;
VL::Type lenSize = (VL::Type)len;
out.SetByteValue( copy, lenSize );
delete[] copy;
this->GetPixelFormat().SetBitsAllocated( 16 );
}
else
{
VL::Type strSize = (VL::Type) str.size();
out.SetByteValue( &str[0], strSize);
}
return r;
}
bool RAWCodec::DecodeByStreams(std::istream &is, std::ostream &os)
{
bool r = ImageCodec::DecodeByStreams(is, os);
return r;
}
bool RAWCodec::GetHeaderInfo(std::istream &, TransferSyntax &ts)
{
ts = TransferSyntax::ExplicitVRLittleEndian;
if( NeedByteSwap )
{
ts = TransferSyntax::ImplicitVRBigEndianPrivateGE;
}
return true;
}
ImageCodec * RAWCodec::Clone() const
{
return NULL;
}
} // end namespace gdcm
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