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1 /* |
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2 * Copyright (c) 2003, 2004 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: JPEG2000 image encoder/decoder plugin class |
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15 * |
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16 */ |
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17 |
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18 |
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19 #ifndef __JP2KCONVERT_H__ |
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20 #define __JP2KCONVERT_H__ |
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21 |
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22 // INCLUDES |
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23 #include <icl/imageplugin.h> |
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24 #include <icl/imagedata.h> |
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25 |
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26 // CONSTANTS |
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27 |
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28 // MACROS |
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29 |
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30 // DATA TYPES |
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31 |
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32 // FUNCTION PROTOTYPES |
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33 |
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34 // FORWARD DECLARATIONS |
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35 class TJ2kInfo; |
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36 class CJp2kReadCodec; |
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37 |
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38 // CLASS DECLARATION |
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39 |
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40 /** |
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41 * CJp2kDecoder JPEG2000 image decoder plugin class. |
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42 * Implement the ICL decoder plugin interface. |
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43 * |
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44 * JP2KCodec.dll |
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45 * @since 2.6 |
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46 */ |
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47 class CJp2kDecoder : public CImageDecoderPlugin |
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48 { |
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49 public: // Constructors and destructor |
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50 |
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51 /** |
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52 * Two-phased constructor. |
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53 */ |
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54 static CJp2kDecoder* NewL(); |
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55 |
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56 /** |
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57 * Destructor. |
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58 */ |
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59 virtual ~CJp2kDecoder(); |
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60 |
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61 public: // New functions |
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62 |
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63 public: // Functions from base classes |
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64 |
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65 /** |
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66 * From CImageDecoderPlugin |
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67 * @since 2.6 |
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68 * @param aFrameNumber: Number of frame whose type is needed. |
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69 * @param aImageType: Return image type UID. |
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70 * @param aImageSubType: Returned image sub type UID. |
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71 */ |
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72 void ImageType( TInt aFrameNumber, TUid& aImageType, TUid& aImageSubType ) const; |
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73 |
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74 /** |
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75 * From CImageDecoderPlugin |
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76 * @since 2.6 |
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77 */ |
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78 TInt NumberOfImageComments() const; |
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79 |
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80 /** |
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81 * From CImageDecoderPlugin |
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82 * @since 2.6 |
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83 * @param aCommentNumber: Number of comment whose comment is needed. |
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84 */ |
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85 HBufC* ImageCommentL( TInt aCommentNumber ) const; |
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86 |
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87 /** |
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88 * From CImageDecoderPlugin |
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89 * @since 2.6 |
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90 * @param aFrameNumber: Number of frame whose comment is needed. |
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91 */ |
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92 TInt NumberOfFrameComments( TInt aFrameNumber ) const; |
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93 |
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94 /** |
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95 * From CImageDecoderPlugin |
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96 * @since 2.6 |
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97 * @param aFrameNumber: Number of frame whose comment is needed. |
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98 * @param aCommentNumber: Number of comment whose comment is needed. |
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99 */ |
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100 HBufC* FrameCommentL( TInt aFrameNumber, TInt aCommentNumber ) const; |
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101 |
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102 protected: // New functions |
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103 |
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104 protected: // Functions from base classes |
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105 |
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106 /** |
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107 * From CImageDecoderPlugin |
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108 */ |
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109 CFrameInfoStrings* FrameInfoStringsL( RFs& aFs, TInt aFrameNumber ); |
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110 |
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111 /** |
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112 * From CImageDecoderPlugin |
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113 */ |
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114 TInt FrameHeaderBlockSize( TInt aFrameNumber ) const; |
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115 |
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116 /** |
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117 * From CImageDecoderPlugin |
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118 */ |
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119 TInt FrameBlockSize( TInt aFrameNumber ) const; |
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120 |
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121 /** |
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122 * From CImageDecoderPlugin |
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123 */ |
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124 void DoConvert(); |
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125 |
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126 private: |
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127 |
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128 /** |
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129 * C++ default constructor. |
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130 */ |
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131 CJp2kDecoder(); |
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132 |
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133 /** |
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134 * Main state machine |
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135 * Verify and start parsing the JP2 file format |
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136 * or JP2 codestream. |
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137 * @since 2.6 |
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138 */ |
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139 void ReadFormatL(); |
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140 |
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141 /** |
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142 * Verify and process JP2 Signature box |
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143 * @since 2.6 |
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144 */ |
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145 void ReadSignatureBoxL(); |
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146 /** |
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147 * Verify and process JP2 File Type box |
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148 * @since 2.6 |
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149 */ |
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150 void ReadFileTypeBoxL(); |
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151 |
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152 /** |
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153 * Verify and process JP2 Header box (superbox) |
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154 * @since 2.6 |
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155 */ |
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156 void ReadJp2HeaderBoxL(); |
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157 |
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158 /** |
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159 * Verify and process Image Header box (in JP2 Header box) |
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160 * @since 2.6 |
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161 */ |
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162 void ReadImageHeaderBoxL(); |
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163 |
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164 /** |
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165 * Verify and process Colour Specification box (in JP2 Header box) |
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166 * @since 2.6 |
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167 * @param aBoxLength: the length of the Colour Specification box |
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168 */ |
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169 void ReadColorSpecBoxL( const TUint32 aBoxLength ); |
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170 |
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171 /** |
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172 * Verify and process Bits Per Component box (in JP2 Header box) |
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173 * @since 2.6 |
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174 * @param aBoxLength: the length of the Bits Per Component box |
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175 */ |
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176 void ReadBitsPerCompBoxL( TUint32 aBoxLength ); |
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177 |
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178 /** |
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179 * Verify and process Resolution box (in JP2 Header box, which itself is superbox) |
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180 * @since 2.6 |
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181 * @param aPtrLimit: the boundary of the data to be read |
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182 * @param aBoxLength: the length of the Resolution box |
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183 */ |
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184 void ReadResolutionBoxL( const TUint8 *aPtrLimit, TUint32 aBoxLength ); |
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185 |
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186 /** |
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187 * Verify and process Default Display Resolution box (in Resolution box) |
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188 * @since 2.6 |
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189 */ |
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190 void ReadDisplayResBoxL(); |
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191 |
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192 /** |
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193 * Verify and process Capture Resolution box (in Resolution box) |
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194 * @since 2.6 |
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195 * @param aBoxLength: the length of the Capture Resolution box |
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196 */ |
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197 void ReadCaptureResBoxL( TUint32 aBoxLength ); |
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198 |
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199 /** |
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200 * Verify and process Palette box (in JP2 Header box) |
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201 * @since 2.6 |
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202 */ |
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203 void ReadPaletteBoxL(); |
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204 |
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205 /** |
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206 * Verify and process Component Mapping box (in JP2 Header box) |
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207 * @since 2.6 |
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208 * @param aBoxLength: the length of the Component Mapping box |
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209 */ |
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210 void ReadComponentMapBoxL( TUint32 aBoxLength ); |
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211 |
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212 /** |
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213 * Verify and process Channel Definition box (in JP2 Header box) |
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214 * @since 2.6 |
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215 * @param aBoxLength: the length of the Channel Definition box |
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216 */ |
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217 void ReadChannelDefBoxL( TUint32 aBoxLength ); |
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218 |
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219 /** |
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220 * Verify and process IPR box |
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221 * @since 2.6 |
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222 */ |
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223 void ReadIPRBoxL(); |
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224 |
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225 /** |
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226 * Verify and process XML box |
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227 * @since 2.6 |
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228 */ |
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229 void ReadXMLBoxL(); |
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230 |
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231 /** |
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232 * Verify and process UUID box |
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233 * @since 2.6 |
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234 */ |
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235 void ReadUUIDBoxL(); |
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236 |
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237 /** |
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238 * Verify and process UUID Info box (superbox) |
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239 * @since 2.6 |
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240 */ |
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241 void ReadUUIDInfoBoxL(); |
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242 |
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243 /** |
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244 * Ignore the content and advance the iterator to the next box |
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245 * @since 2.6 |
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246 */ |
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247 void IgnoreBoxL(); |
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248 |
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249 /** |
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250 * Update the current state according to the box type |
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251 * @since 2.6 |
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252 */ |
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253 void UpdateStateFromBoxTypeL(); |
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254 |
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255 /** |
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256 * Read frame headers and instantiate decoder for application. |
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257 * @since 2.6 |
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258 */ |
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259 void ScanDataL(); |
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260 |
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261 public: // Data |
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262 |
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263 // State machine represent the state when parsing the JP2 file format. |
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264 enum TDecoderState |
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265 { |
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266 EStateInUnknown, |
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267 EStateInSignatureBox, |
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268 EStateInFileTypeBox, |
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269 EStateInJP2SuperBox, |
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270 EStateInIPRBox, |
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271 EStateInXMLBox, |
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272 EStateInUUIDBox, |
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273 EStateInUUIDInfoBox, |
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274 EStateInCodestreamBox |
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275 }; |
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276 |
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277 protected: // Data |
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278 |
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279 private: // Data |
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280 |
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281 // JP2 file format information |
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282 TJ2kInfo iJ2kInfo; |
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283 |
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284 // Descriptor of the buffer |
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285 TPtrC8 iBufferDes; |
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286 |
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287 // Length of box read |
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288 TUint32 iBoxLength; |
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289 |
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290 // Type of box read |
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291 TUint32 iBoxType; |
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292 |
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293 // Position of last ReadDataL() used |
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294 TUint32 iLastRead; |
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295 |
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296 // Enter the method from ICL framework |
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297 TBool iCallFromFramework; |
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298 |
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299 // Pointer into the data represented by iBufferDes |
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300 const TUint8 *iPtr; |
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301 |
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302 // Current state of the parsing of file or data |
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303 TDecoderState iState; |
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304 |
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305 public: // Friend classes |
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306 |
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307 protected: // Friend classes |
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308 |
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309 private: // Friend classes |
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310 }; |
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311 |
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312 #endif // __JP2KCONVERT_H__ |