/usr/include/dcmtk/dcmjpeg/djdijg8.h is in libdcmtk-dev 3.6.1~20160216-4.
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*
* Copyright (C) 1997-2014, OFFIS e.V.
* All rights reserved. See COPYRIGHT file for details.
*
* This software and supporting documentation were developed by
*
* OFFIS e.V.
* R&D Division Health
* Escherweg 2
* D-26121 Oldenburg, Germany
*
*
* Module: dcmjpeg
*
* Author: Norbert Olges, Marco Eichelberg
*
* Purpose: decompression routines of the IJG JPEG library configured for 8 bits/sample.
*
*/
#ifndef DJDIJG8_H
#define DJDIJG8_H
#include "dcmtk/config/osconfig.h"
#include "dcmtk/dcmjpeg/djdecabs.h" /* for class DJDecoder */
extern "C"
{
struct jpeg_decompress_struct;
}
class DJCodecParameter;
/** this class encapsulates the decompression routines of the
* IJG JPEG library configured for 8 bits/sample.
*/
class DCMTK_DCMJPEG_EXPORT DJDecompressIJG8Bit : public DJDecoder
{
public:
/** constructor
* @param cp codec parameters
* @param isYBR flag indicating if DICOM photometric interpretation is YCbCr
*/
DJDecompressIJG8Bit(const DJCodecParameter& cp, OFBool isYBR);
/// destructor
virtual ~DJDecompressIJG8Bit();
/** initializes internal object structures.
* Must be called before a new frame is decompressed.
* @return EC_Normal if successful, an error code otherwise
*/
virtual OFCondition init();
/** suspended decompression routine. Decompresses a JPEG frame
* until finished or out of data. Can be called with new data
* until a frame is complete.
* @param compressedFrameBuffer pointer to compressed input data, must not be NULL
* @param compressedFrameBufferSize size of buffer, in bytes
* @param uncompressedFrameBuffer pointer to uncompressed output data, must not be NULL.
* This buffer must not change between multiple decode() calls for a single frame.
* @param uncompressedFrameBufferSize size of buffer, in bytes (!)
* Buffer must be large enough to contain a complete frame.
* @param isSigned OFTrue, if uncompressed pixel data is signed, OFFalse otherwise
* @return EC_Normal if successful, EC_Suspend if more data is needed, an error code otherwise.
*/
virtual OFCondition decode(
Uint8 *compressedFrameBuffer,
Uint32 compressedFrameBufferSize,
Uint8 *uncompressedFrameBuffer,
Uint32 uncompressedFrameBufferSize,
OFBool isSigned);
/** returns the number of bytes per sample that will be written when decoding.
*/
virtual Uint16 bytesPerSample() const
{
return OFstatic_cast(Uint16, sizeof(Uint8));
}
/** after successful compression,
* returns the color model of the decompressed image
*/
virtual EP_Interpretation getDecompressedColorModel() const
{
return decompressedColorModel;
}
/** callback function used to report warning messages and the like.
* Should not be called by user code directly.
* @param msg_level -1 for warnings, 0 and above for trace messages
*/
virtual void emitMessage(int msg_level) const;
private:
/// private undefined copy constructor
DJDecompressIJG8Bit(const DJDecompressIJG8Bit&);
/// private undefined copy assignment operator
DJDecompressIJG8Bit& operator=(const DJDecompressIJG8Bit&);
/// cleans up cinfo structure, called from destructor and error handlers
void cleanup();
/// codec parameters
const DJCodecParameter *cparam;
/// decompression structure
jpeg_decompress_struct *cinfo;
/// position of last suspend
int suspension;
/// temporary storage for row buffer during suspension
void *jsampBuffer;
/// Flag indicating if DICOM photometric interpretation is YCbCr
OFBool dicomPhotometricInterpretationIsYCbCr;
/// color model after decompression
EP_Interpretation decompressedColorModel;
};
#endif
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