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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: TJ2kUtils class used to provide common public static |
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15 * functions used by all classes in JP2KCodec. |
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16 * |
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17 */ |
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18 |
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19 |
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20 #ifndef __JP2KUTILS_H__ |
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21 #define __JP2KUTILS_H__ |
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22 |
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23 // INCLUDES |
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24 #include <e32base.h> |
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25 |
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26 // CONSTANTS |
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27 const TInt KImplementationPrecision = 32; |
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28 |
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29 // MACROS |
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30 |
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31 // DATA TYPES |
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32 |
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33 typedef TInt32 TPrecInt; |
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34 |
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35 struct TDiv |
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36 { |
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37 TInt quot; // Quotient |
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38 TInt rem; // Remainder |
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39 }; |
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40 |
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41 // FUNCTION PROTOTYPES |
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42 |
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43 // FORWARD DECLARATIONS |
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44 |
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45 // CLASS DECLARATION |
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46 |
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47 /** |
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48 * TJ2kUtils class used to provide common public static |
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49 * methods used by all classes |
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50 * |
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51 * JP2KCodec.dll |
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52 * @since 2.6 |
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53 */ |
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54 class TJ2kUtils |
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55 { |
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56 public: // Constructors and destructor |
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57 |
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58 public: // New functions |
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59 |
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60 /** |
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61 * Get the ceiling between two integers |
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62 * @since 2.6 |
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63 * @param aL: first integer to compute. |
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64 * @param aR: second integer to compute. |
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65 * @return TInt32: the ceiling between two integers aL and aR. |
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66 */ |
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67 static TInt32 Ceil( TInt32 aL, TInt32 aR ); |
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68 |
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69 /** |
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70 * Get the floor between two integers |
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71 * @since 2.6 |
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72 * @param aL: first integer to compute. |
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73 * @param aR: second integer to compute. |
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74 * @return TInt32: the floor between two integers aL and aR. |
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75 */ |
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76 static TInt32 Floor( TInt32 aL, TInt32 aR ); |
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77 |
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78 /** |
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79 * Get the quotient and remainder |
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80 * @since 2.6 |
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81 * @param aNum: first integer to compute. |
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82 * @param aDenom: divisor integer. |
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83 * @return TDiv: the structure contains the quotient and remainder. |
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84 */ |
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85 static TDiv Div( TInt aNum, TInt aDenom ); |
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86 |
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87 /** |
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88 * Get the log2 value of an integer |
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89 * @since 2.6 |
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90 * @param aI: an integer to compute. |
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91 * @return TInt32: the log2 value of the integer aI. |
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92 */ |
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93 static TInt32 Log2( TUint32 aI ); |
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94 |
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95 /** |
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96 * Allocate 2-D array |
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97 * @since 2.6 |
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98 * @param aRowSize: row size of the 2-D array. |
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99 * @param aColSize: column size of the 2-D array. |
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100 * @return TPrecInt**: a pointer of pointer to TPrecInt. |
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101 */ |
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102 static TPrecInt** Alloc2DArrayL( TInt aRowSize, TInt aColSize ); |
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103 |
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104 /** |
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105 * Free 2-D array |
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106 * @since 2.6 |
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107 * @param aPtr: a pointer of pointer to TPrecInt to be freed. |
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108 */ |
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109 static void Free2DArray( TPrecInt **aPtr ); |
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110 |
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111 /** |
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112 * Wrapper to free 2-D array when put into TCleanupItem |
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113 * @since 2.6 |
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114 * @param aPtr: a pointer of pointer to TAny to be freed. |
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115 */ |
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116 static void Free2DArray( TAny *aPtr ); |
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117 |
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118 public: // Functions from base classes |
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119 |
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120 protected: // New functions |
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121 |
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122 protected: // Functions from base classes |
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123 |
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124 private: |
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125 |
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126 public: // Data |
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127 |
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128 protected: // Data |
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129 |
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130 private: // Data |
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131 |
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132 public: // Friend classes |
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133 |
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134 protected: // Friend classes |
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135 |
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136 private: // Friend classes |
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137 |
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138 }; |
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139 |
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140 #endif // __JP2KUTILS_H__ |