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: CodedCBlkDataSrcDec.java,v 1.17 2001/09/14 09:26:23 grosbois Exp $ |
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5 | * |
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6 | * Class: CodedCBlkDataSrcDec |
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7 | * |
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8 | * Description: Interface that defines a source of entropy coded |
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9 | * data that is transferred in a code-block by |
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10 | * code-block basis (decoder side). |
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11 | * |
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12 | * |
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13 | * |
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14 | * COPYRIGHT: |
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15 | * |
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16 | * This software module was originally developed by Raphaël Grosbois and |
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17 | * Diego Santa Cruz (Swiss Federal Institute of Technology-EPFL); Joel |
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18 | * Askelöf (Ericsson Radio Systems AB); and Bertrand Berthelot, David |
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19 | * Bouchard, Félix Henry, Gerard Mozelle and Patrice Onno (Canon Research |
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20 | * Centre France S.A) in the course of development of the JPEG2000 |
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21 | * standard as specified by ISO/IEC 15444 (JPEG 2000 Standard). This |
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22 | * software module is an implementation of a part of the JPEG 2000 |
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23 | * Standard. Swiss Federal Institute of Technology-EPFL, Ericsson Radio |
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24 | * Systems AB and Canon Research Centre France S.A (collectively JJ2000 |
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25 | * Partners) agree not to assert against ISO/IEC and users of the JPEG |
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26 | * 2000 Standard (Users) any of their rights under the copyright, not |
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27 | * including other intellectual property rights, for this software module |
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28 | * with respect to the usage by ISO/IEC and Users of this software module |
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29 | * or modifications thereof for use in hardware or software products |
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30 | * claiming conformance to the JPEG 2000 Standard. Those intending to use |
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31 | * this software module in hardware or software products are advised that |
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32 | * their use may infringe existing patents. The original developers of |
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33 | * this software module, JJ2000 Partners and ISO/IEC assume no liability |
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34 | * for use of this software module or modifications thereof. No license |
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35 | * or right to this software module is granted for non JPEG 2000 Standard |
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36 | * conforming products. JJ2000 Partners have full right to use this |
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37 | * software module for his/her own purpose, assign or donate this |
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38 | * software module to any third party and to inhibit third parties from |
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39 | * using this software module for non JPEG 2000 Standard conforming |
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40 | * products. This copyright notice must be included in all copies or |
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41 | * derivative works of this software module. |
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42 | * |
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43 | * Copyright (c) 1999/2000 JJ2000 Partners. |
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44 | * */ |
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45 | using System; |
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46 | using CSJ2K.j2k.wavelet.synthesis; |
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47 | using CSJ2K.j2k.image; |
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48 | namespace CSJ2K.j2k.entropy.decoder |
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49 | { |
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50 | |||
51 | /// <summary> This interface defines a source of entropy coded data and methods to |
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52 | /// transfer it in a code-block by code-block basis. In each call to |
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53 | /// 'geCodeBlock()' a specified coded code-block is returned. |
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54 | /// |
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55 | /// <p>This interface is the source of data for the entropy decoder. See the |
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56 | /// 'EntropyDecoder' class.</p> |
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57 | /// |
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58 | /// <p>For each coded-code-block the entropy-coded data is returned along with |
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59 | /// its truncation point information in a 'DecLyrdCBlk' object.</p> |
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60 | /// |
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61 | /// </summary> |
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62 | /// <seealso cref="EntropyDecoder"> |
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63 | /// |
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64 | /// </seealso> |
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65 | /// <seealso cref="DecLyrdCBlk"> |
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66 | /// |
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67 | /// </seealso> |
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68 | /// <seealso cref="jj2000.j2k.codestream.reader.BitstreamReaderAgent"> |
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69 | /// |
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70 | /// </seealso> |
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71 | public interface CodedCBlkDataSrcDec:InvWTData |
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72 | { |
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73 | |||
74 | /// <summary> Returns the specified coded code-block, for the specified component, in |
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75 | /// the current tile. The first layer to return is indicated by 'fl'. The |
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76 | /// number of layers that is returned depends on 'nl' and the amount of |
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77 | /// data available. |
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78 | /// |
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79 | /// <p>The argument 'fl' is to be used by subsequent calls to this method |
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80 | /// for the same code-block. In this way supplamental data can be retrieved |
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81 | /// at a later time. The fact that data from more than one layer can be |
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82 | /// returned means that several packets from the same code-block, of the |
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83 | /// same component, and the same tile, have been concatenated.</p> |
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84 | /// |
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85 | /// <p>The returned compressed code-block can have its progressive |
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86 | /// attribute set. If this attribute is set it means that more data can be |
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87 | /// obtained by subsequent calls to this method (subject to transmission |
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88 | /// delays, etc). If the progressive attribute is not set it means that the |
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89 | /// returned data is all the data that can be obtained for the specified |
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90 | /// subblock.</p> |
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91 | /// |
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92 | /// <p>The compressed code-block is uniquely specified by the current tile, |
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93 | /// the component (identified by 'c'), the subband (indentified by 'sb') |
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94 | /// and the code-bock vertical and horizontal indexes 'm' and 'n'.</p> |
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95 | /// |
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96 | /// <p>The 'ulx' and 'uly' members of the returned 'DecLyrdCBlk' object |
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97 | /// contain the coordinates of the top-left corner of the block, with |
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98 | /// respect to the tile, not the subband.</p> |
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99 | /// |
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100 | /// </summary> |
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101 | /// <param name="c">The index of the component, from 0 to N-1. |
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102 | /// |
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103 | /// </param> |
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104 | /// <param name="m">The vertical index of the code-block to return, in the |
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105 | /// specified subband. |
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106 | /// |
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107 | /// </param> |
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108 | /// <param name="n">The horizontal index of the code-block to return, in the |
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109 | /// specified subband. |
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110 | /// |
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111 | /// </param> |
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112 | /// <param name="sb">The subband in whic the requested code-block is. |
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113 | /// |
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114 | /// </param> |
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115 | /// <param name="fl">The first layer to return. |
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116 | /// |
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117 | /// </param> |
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118 | /// <param name="nl">The number of layers to return, if negative all available |
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119 | /// layers are returned, starting at 'fl'. |
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120 | /// |
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121 | /// </param> |
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122 | /// <param name="ccb">If not null this object is used to return the compressed |
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123 | /// code-block. If null a new object is created and returned. If the data |
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124 | /// array in ccb is not null then it can be reused to return the compressed |
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125 | /// data. |
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126 | /// |
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127 | /// </param> |
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128 | /// <returns> The compressed code-block, with a certain number of layers |
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129 | /// determined by the available data and 'nl'. |
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130 | /// |
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131 | /// </returns> |
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132 | DecLyrdCBlk getCodeBlock(int c, int m, int n, SubbandSyn sb, int fl, int nl, DecLyrdCBlk ccb); |
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133 | } |
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134 | } |