corrade-vassal – Blame information for rev 1
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1 | vero | 1 | /* |
2 | * CVS identifier: |
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3 | * |
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4 | * $Id: EntropyDecoder.java,v 1.38 2001/09/20 12:48:01 grosbois Exp $ |
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5 | * |
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6 | * Class: EntropyDecoder |
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7 | * |
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8 | * Description: The abstract class for all entropy decoders. |
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9 | * |
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10 | * |
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11 | * |
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12 | * COPYRIGHT: |
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13 | * |
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14 | * This software module was originally developed by Raphaël Grosbois and |
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15 | * Diego Santa Cruz (Swiss Federal Institute of Technology-EPFL); Joel |
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16 | * Askelöf (Ericsson Radio Systems AB); and Bertrand Berthelot, David |
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17 | * Bouchard, Félix Henry, Gerard Mozelle and Patrice Onno (Canon Research |
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18 | * Centre France S.A) in the course of development of the JPEG2000 |
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19 | * standard as specified by ISO/IEC 15444 (JPEG 2000 Standard). This |
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20 | * software module is an implementation of a part of the JPEG 2000 |
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21 | * Standard. Swiss Federal Institute of Technology-EPFL, Ericsson Radio |
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22 | * Systems AB and Canon Research Centre France S.A (collectively JJ2000 |
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23 | * Partners) agree not to assert against ISO/IEC and users of the JPEG |
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24 | * 2000 Standard (Users) any of their rights under the copyright, not |
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25 | * including other intellectual property rights, for this software module |
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26 | * with respect to the usage by ISO/IEC and Users of this software module |
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27 | * or modifications thereof for use in hardware or software products |
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28 | * claiming conformance to the JPEG 2000 Standard. Those intending to use |
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29 | * this software module in hardware or software products are advised that |
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30 | * their use may infringe existing patents. The original developers of |
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31 | * this software module, JJ2000 Partners and ISO/IEC assume no liability |
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32 | * for use of this software module or modifications thereof. No license |
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33 | * or right to this software module is granted for non JPEG 2000 Standard |
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34 | * conforming products. JJ2000 Partners have full right to use this |
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35 | * software module for his/her own purpose, assign or donate this |
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36 | * software module to any third party and to inhibit third parties from |
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37 | * using this software module for non JPEG 2000 Standard conforming |
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38 | * products. This copyright notice must be included in all copies or |
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39 | * derivative works of this software module. |
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40 | * |
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41 | * Copyright (c) 1999/2000 JJ2000 Partners. |
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42 | * */ |
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43 | using System; |
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44 | using CSJ2K.j2k.quantization.dequantizer; |
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45 | using CSJ2K.j2k.codestream.reader; |
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46 | using CSJ2K.j2k.wavelet.synthesis; |
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47 | using CSJ2K.j2k.codestream; |
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48 | using CSJ2K.j2k.entropy; |
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49 | using CSJ2K.j2k.image; |
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50 | using CSJ2K.j2k.io; |
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51 | using CSJ2K.j2k; |
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52 | namespace CSJ2K.j2k.entropy.decoder |
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53 | { |
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54 | |||
55 | /// <summary> This is the abstract class from which all entropy decoders must |
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56 | /// inherit. This class implements the 'MultiResImgData', therefore it has the |
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57 | /// concept of a current tile and all operations are performed on the current |
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58 | /// tile. |
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59 | /// |
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60 | /// <p>Default implementations of the methods in 'MultiResImgData' are provided |
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61 | /// through the 'MultiResImgDataAdapter' abstract class.</p> |
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62 | /// |
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63 | /// <p>Sign magnitude representation is used (instead of two's complement) for |
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64 | /// the output data. The most significant bit is used for the sign (0 if |
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65 | /// positive, 1 if negative). Then the magnitude of the quantized coefficient |
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66 | /// is stored in the next most significat bits. The most significant magnitude |
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67 | /// bit corresponds to the most significant bit-plane and so on.</p |
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68 | /// |
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69 | /// </summary> |
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70 | /// <seealso cref="MultiResImgData"> |
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71 | /// </seealso> |
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72 | /// <seealso cref="MultiResImgDataAdapter"> |
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73 | /// |
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74 | /// </seealso> |
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75 | public abstract class EntropyDecoder:MultiResImgDataAdapter, CBlkQuantDataSrcDec |
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76 | { |
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77 | /// <summary> Returns the horizontal code-block partition origin. Allowable values |
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78 | /// are 0 and 1, nothing else. |
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79 | /// |
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80 | /// </summary> |
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81 | virtual public int CbULX |
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82 | { |
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83 | get |
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84 | { |
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85 | return src.CbULX; |
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86 | } |
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87 | |||
88 | } |
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89 | /// <summary> Returns the vertical code-block partition origin. Allowable values are |
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90 | /// 0 and 1, nothing else. |
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91 | /// |
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92 | /// </summary> |
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93 | virtual public int CbULY |
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94 | { |
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95 | get |
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96 | { |
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97 | return src.CbULY; |
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98 | } |
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99 | |||
100 | } |
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101 | /// <summary> Returns the parameters that are used in this class and |
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102 | /// implementing classes. It returns a 2D String array. Each of the |
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103 | /// 1D arrays is for a different option, and they have 3 |
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104 | /// elements. The first element is the option name, the second one |
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105 | /// is the synopsis and the third one is a long description of what |
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106 | /// the parameter is. The synopsis or description may be 'null', in |
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107 | /// which case it is assumed that there is no synopsis or |
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108 | /// description of the option, respectively. Null may be returned |
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109 | /// if no options are supported. |
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110 | /// |
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111 | /// </summary> |
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112 | /// <returns> the options name, their synopsis and their explanation, |
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113 | /// or null if no options are supported. |
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114 | /// |
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115 | /// </returns> |
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116 | public static System.String[][] ParameterInfo |
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117 | { |
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118 | get |
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119 | { |
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120 | return pinfo; |
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121 | } |
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122 | |||
123 | } |
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124 | |||
125 | /// <summary>The prefix for entropy decoder optiojns: 'C' </summary> |
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126 | public const char OPT_PREFIX = 'C'; |
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127 | |||
128 | /// <summary>The list of parameters that is accepted by the entropy |
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129 | /// decoders. They start with 'C'. |
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130 | /// </summary> |
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131 | //UPGRADE_NOTE: Final was removed from the declaration of 'pinfo'. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'" |
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132 | private static readonly System.String[][] pinfo = new System.String[][]{new System.String[]{"Cverber", "[on|off]", "Specifies if the entropy decoder should be verbose about detected " + "errors. If 'on' a message is printed whenever an error is detected.", "on"}, new System.String[]{"Cer", "[on|off]", "Specifies if error detection should be performed by the entropy " + "decoder engine. If errors are detected they will be concealed and " + "the resulting distortion will be less important. Note that errors " + "can only be detected if the encoder that generated the data " + "included error resilience information.", "on"}}; |
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133 | |||
134 | /// <summary>The bit stream transport from where to get the compressed data |
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135 | /// (the source) |
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136 | /// </summary> |
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137 | protected internal CodedCBlkDataSrcDec src; |
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138 | |||
139 | /// <summary> Initializes the source of compressed data. |
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140 | /// |
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141 | /// </summary> |
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142 | /// <param name="src">From where to obtain the compressed data. |
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143 | /// |
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144 | /// </param> |
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145 | public EntropyDecoder(CodedCBlkDataSrcDec src):base(src) |
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146 | { |
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147 | this.src = src; |
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148 | } |
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149 | |||
150 | /// <summary> Returns the subband tree, for the specified tile-component. This method |
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151 | /// returns the root element of the subband tree structure, see Subband and |
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152 | /// SubbandSyn. The tree comprises all the available resolution levels. |
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153 | /// |
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154 | /// <P>The number of magnitude bits ('magBits' member variable) for |
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155 | /// each subband is not initialized. |
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156 | /// |
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157 | /// </summary> |
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158 | /// <param name="t">The index of the tile, from 0 to T-1. |
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159 | /// |
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160 | /// </param> |
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161 | /// <param name="c">The index of the component, from 0 to C-1. |
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162 | /// |
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163 | /// </param> |
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164 | /// <returns> The root of the tree structure. |
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165 | /// |
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166 | /// </returns> |
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167 | public override SubbandSyn getSynSubbandTree(int t, int c) |
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168 | { |
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169 | return src.getSynSubbandTree(t, c); |
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170 | } |
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171 | public abstract CSJ2K.j2k.image.DataBlk getCodeBlock(int param1, int param2, int param3, CSJ2K.j2k.wavelet.synthesis.SubbandSyn param4, CSJ2K.j2k.image.DataBlk param5); |
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172 | public abstract CSJ2K.j2k.image.DataBlk getInternCodeBlock(int param1, int param2, int param3, CSJ2K.j2k.wavelet.synthesis.SubbandSyn param4, CSJ2K.j2k.image.DataBlk param5); |
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173 | } |
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174 | } |