File: djencsv1.cc

package info (click to toggle)
dcmtk 3.6.0-12
  • links: PTS, VCS
  • area: main
  • in suites: wheezy
  • size: 32,976 kB
  • sloc: cpp: 193,852; ansic: 46,292; sh: 4,020; makefile: 3,969; perl: 3,278; lex: 94
file content (120 lines) | stat: -rw-r--r-- 3,327 bytes parent folder | download | duplicates (3)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
/*
 *
 *  Copyright (C) 1997-2010, 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:  Marco Eichelberg, Norbert Olges
 *
 *  Purpose: Codec class for encoding JPEG Lossless Selection Value 1 (8/12/16-bit)
 *
 *  Last Update:      $Author: joergr $
 *  Update Date:      $Date: 2010-11-03 11:22:38 $
 *  CVS/RCS Revision: $Revision: 1.4 $
 *  Status:           $State: Exp $
 *
 *  CVS/RCS Log at end of file
 *
 */

#include "dcmtk/config/osconfig.h"
#include "dcmtk/dcmjpeg/djencsv1.h"
#include "dcmtk/dcmjpeg/djcparam.h"
#include "dcmtk/dcmjpeg/djrplol.h"
#include "dcmtk/dcmjpeg/djeijg8.h"
#include "dcmtk/dcmjpeg/djeijg12.h"
#include "dcmtk/dcmjpeg/djeijg16.h"


DJEncoderP14SV1::DJEncoderP14SV1()
: DJCodecEncoder()
{
}


DJEncoderP14SV1::~DJEncoderP14SV1()
{
}


E_TransferSyntax DJEncoderP14SV1::supportedTransferSyntax() const
{
  return EXS_JPEGProcess14SV1TransferSyntax;
}


OFBool DJEncoderP14SV1::isLosslessProcess() const
{
  return OFTrue;
}


void DJEncoderP14SV1::createDerivationDescription(
  const DcmRepresentationParameter * toRepParam,
  const DJCodecParameter *cp,
  Uint8 /* bitsPerSample */,
  double ratio,
  OFString& derivationDescription) const
{
  DJ_RPLossless defaultRP;
  const DJ_RPLossless *rp = toRepParam ? (const DJ_RPLossless *)toRepParam : &defaultRP ;
  char buf[64];

  if (cp->getTrueLosslessMode())
    derivationDescription = "Lossless JPEG compression, selection value 1, point transform ";
  else
    derivationDescription = "Pseudo-Lossless JPEG compression, selection value 1, point transform ";
  sprintf(buf, "%u", rp->getPointTransformation());
  derivationDescription += buf;
  derivationDescription += ", compression ratio ";
  appendCompressionRatio(derivationDescription, ratio);
}


DJEncoder *DJEncoderP14SV1::createEncoderInstance(
  const DcmRepresentationParameter * toRepParam,
  const DJCodecParameter *cp,
  Uint8 bitsPerSample) const
{
  DJ_RPLossless defaultRP;
  const DJ_RPLossless *rp = toRepParam ? (const DJ_RPLossless *)toRepParam : &defaultRP ;
  DJEncoder *result = NULL;
  // prediction/selection value is always 1 for this transfer syntax
  if (bitsPerSample > 12)
    result = new DJCompressIJG16Bit(*cp, EJM_lossless, 1, rp->getPointTransformation());
  else if (bitsPerSample > 8)
    result = new DJCompressIJG12Bit(*cp, EJM_lossless, 1, rp->getPointTransformation());
  else
    result = new DJCompressIJG8Bit(*cp, EJM_lossless, 1, rp->getPointTransformation());
  return result;
}


/*
 * CVS/RCS Log
 * $Log: djencsv1.cc,v $
 * Revision 1.4  2010-11-03 11:22:38  joergr
 * Since the pseudo-lossless encoder is not guaranteed to result in lossless
 * compression, the modifications to the DICOM header are treated in the same
 * way as for lossy compression (e.g Lossy Compression Flag is set to "01").
 *
 * Revision 1.3  2010-10-14 13:14:22  joergr
 * Updated copyright header. Added reference to COPYRIGHT file.
 *
 * Revision 1.2  2005-12-08 15:43:48  meichel
 * Changed include path schema for all DCMTK header files
 *
 * Revision 1.1  2001/11/13 15:58:33  meichel
 * Initial release of module dcmjpeg
 *
 *
 */