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1 // Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // |
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15 |
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16 #include <e32base.h> |
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17 |
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18 #include "JpegTypes.h" |
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19 |
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20 void TDataUnitProcessor::SetBufferPtrUtil(CRgbBufferPtr& aBufferPtrUtil) |
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21 { |
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22 iBufferPtrUtil = &aBufferPtrUtil; |
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23 } |
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24 |
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25 |
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26 // TMonoProcessor |
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27 FORCEDINLINE TInt16 MonoPixel(CRgbBufferPtr::TConstRgbBufferPtr aRgbBuffer) |
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28 { |
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29 return TInt16( |
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30 ( |
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31 (CRgbBufferPtr::Red(aRgbBuffer)<<1) + |
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32 CRgbBufferPtr::Green(aRgbBuffer) + |
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33 (CRgbBufferPtr::Green(aRgbBuffer)<<2) + |
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34 CRgbBufferPtr::Blue(aRgbBuffer) |
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35 )>>3 |
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36 ); |
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37 } |
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38 |
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39 TDataUnit* TMonoProcessor::Process(CRgbBufferPtr::TConstRgbBufferPtr aRgbBuffer) |
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40 { |
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41 TInt16* YPtr = iMCU.iCoeff; |
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42 const TInt16* YPtrLimit = YPtr + KJpgDCTBlockSize; |
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43 const TInt KLineStride = iBufferPtrUtil->NextLineOffset(); |
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44 |
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45 do |
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46 { |
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47 TInt p=0; |
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48 do |
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49 { |
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50 *YPtr++ = MonoPixel( CRgbBufferPtr::ShiftPtr(aRgbBuffer, p++) ); |
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51 *YPtr++ = MonoPixel( CRgbBufferPtr::ShiftPtr(aRgbBuffer, p++) ); |
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52 |
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53 } while (p < KJpgDCTBlockWidth); |
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54 aRgbBuffer += KLineStride; |
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55 |
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56 } while (YPtr < YPtrLimit); |
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57 |
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58 return &iMCU; |
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59 } |
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60 |
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61 // T444Processor |
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62 TDataUnit* T444Processor::Process(CRgbBufferPtr::TConstRgbBufferPtr aRgbBuffer) |
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63 { |
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64 TInt16* YPtr = iMCU[0].iCoeff; |
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65 TInt16* CbPtr = iMCU[1].iCoeff; |
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66 TInt16* CrPtr = iMCU[2].iCoeff; |
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67 |
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68 const TInt16* YPtrLimit = YPtr + KJpgDCTBlockSize; |
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69 const TInt KLineStride = iBufferPtrUtil->NextLineOffset(); |
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70 |
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71 do |
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72 { |
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73 TInt p=0; |
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74 do |
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75 { |
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76 TYCbCr::RGBtoYCbCr(YPtr++, CbPtr++, CrPtr++, CRgbBufferPtr::ShiftPtr(aRgbBuffer, p++) ); |
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77 } while (p < KJpgDCTBlockWidth); |
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78 |
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79 aRgbBuffer += KLineStride; |
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80 |
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81 } while (YPtr < YPtrLimit); |
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82 |
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83 return iMCU; |
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84 } |
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85 |
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86 |
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87 // T422Processor |
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88 TDataUnit* T422Processor::Process(CRgbBufferPtr::TConstRgbBufferPtr aRgbBuffer) |
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89 { |
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90 TInt16* CbPtr = iMCU[2].iCoeff; |
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91 ASSERT( CbPtr + KJpgDCTBlockSize == iMCU[3].iCoeff); // we assume that V comp is next to U one |
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92 |
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93 const TInt halfWidth = KJpgDCTBlockWidth >> 1; |
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94 |
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95 DoProcess(iMCU[0].iCoeff,CbPtr, aRgbBuffer); |
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96 DoProcess(iMCU[1].iCoeff,CbPtr + halfWidth, CRgbBufferPtr::ShiftPtr(aRgbBuffer,KJpgDCTBlockWidth) ); |
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97 |
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98 return iMCU; |
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99 } |
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100 |
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101 void T422Processor::DoProcess(TInt16* aYPtr,TInt16* aCbPtr, CRgbBufferPtr::TConstRgbBufferPtr aRgbBuffer) |
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102 { |
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103 const TInt KLineStride = iBufferPtrUtil->NextLineOffset(); |
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104 const TInt16* YPtrLimit = aYPtr + KJpgDCTBlockSize; |
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105 |
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106 do |
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107 { |
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108 TYCbCr::RGBtoYCbCr2PixUVSum(aYPtr,aCbPtr, aRgbBuffer); |
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109 |
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110 TYCbCr::RGBtoYCbCr2PixUVSum(aYPtr+2,aCbPtr+1, CRgbBufferPtr::ShiftPtr(aRgbBuffer,2)); |
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111 |
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112 TYCbCr::RGBtoYCbCr2PixUVSum(aYPtr+4,aCbPtr+2,CRgbBufferPtr::ShiftPtr(aRgbBuffer,4)); |
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113 |
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114 TYCbCr::RGBtoYCbCr2PixUVSum(aYPtr+6,aCbPtr+3,CRgbBufferPtr::ShiftPtr(aRgbBuffer,6)); |
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115 |
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116 aYPtr += KJpgDCTBlockWidth; |
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117 aCbPtr += KJpgDCTBlockWidth; |
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118 aRgbBuffer += KLineStride; |
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119 |
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120 } while (aYPtr < YPtrLimit); |
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121 } |
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122 |
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123 |
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124 // T420Processor |
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125 TDataUnit* T420Processor::Process(CRgbBufferPtr::TConstRgbBufferPtr aRgbBuffer) |
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126 { |
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127 TInt16* CbPtr = iMCU[4].iCoeff; |
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128 ASSERT( CbPtr + KJpgDCTBlockSize == iMCU[5].iCoeff); // we assume that V comp is next to U one |
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129 |
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130 const TInt halfWidth = KJpgDCTBlockWidth >> 1; |
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131 const TInt halfSize = KJpgDCTBlockSize >> 1; |
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132 |
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133 DoProcess(iMCU[0].iCoeff,CbPtr, aRgbBuffer); |
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134 DoProcess(iMCU[1].iCoeff,CbPtr + halfWidth, CRgbBufferPtr::ShiftPtr(aRgbBuffer, KJpgDCTBlockWidth)); |
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135 |
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136 aRgbBuffer += (iBufferPtrUtil->NextLineOffset() << 3); |
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137 |
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138 CbPtr += halfSize; |
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139 |
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140 DoProcess(iMCU[2].iCoeff,CbPtr, aRgbBuffer); |
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141 DoProcess(iMCU[3].iCoeff,CbPtr + halfWidth, CRgbBufferPtr::ShiftPtr(aRgbBuffer, KJpgDCTBlockWidth)); |
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142 |
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143 return iMCU; |
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144 } |
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145 |
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146 void T420Processor::DoProcess(TInt16* aYPtr,TInt16* aCbPtr, CRgbBufferPtr::TConstRgbBufferPtr aRgbBuffer) |
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147 { |
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148 const TInt16* YPtrLimit = aYPtr + KJpgDCTBlockSize; |
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149 const TInt KLineStride = iBufferPtrUtil->NextLineOffset(); |
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150 const TInt KDoubleLineStride = KLineStride << 1; |
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151 |
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152 do |
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153 { |
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154 TYCbCr::RGBtoYCbCr4PixUVSum(aYPtr, aCbPtr, aRgbBuffer, KLineStride); |
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155 |
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156 TYCbCr::RGBtoYCbCr4PixUVSum(aYPtr+2, aCbPtr+1, CRgbBufferPtr::ShiftPtr(aRgbBuffer,2), KLineStride); |
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157 |
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158 TYCbCr::RGBtoYCbCr4PixUVSum(aYPtr+4, aCbPtr+2, CRgbBufferPtr::ShiftPtr(aRgbBuffer,4), KLineStride); |
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159 |
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160 TYCbCr::RGBtoYCbCr4PixUVSum(aYPtr+6, aCbPtr+3, CRgbBufferPtr::ShiftPtr(aRgbBuffer,6), KLineStride); |
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161 |
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162 aRgbBuffer += KDoubleLineStride; |
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163 aCbPtr += KJpgDCTBlockWidth; |
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164 aYPtr += KJpgDCTBlockWidth << 1; |
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165 |
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166 } while (aYPtr < YPtrLimit); |
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167 } |
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168 |
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169 |