Mercurial > projects > dwt2
annotate org.eclipse.swt.win32.win32.x86/src/org/eclipse/swt/internal/image/JPEGFileFormat.d @ 6:f36c67707cb3
Removed import to tango.core.Exception
author | Frank Benoit <benoit@tionex.de> |
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date | Thu, 05 Mar 2009 00:18:47 +0100 |
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1 /******************************************************************************* |
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2 * Copyright (c) 2000, 2008 IBM Corporation and others. |
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3 * All rights reserved. This source file is made available under the terms contained in the README file |
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4 * accompanying this program. The README file should be located in the about_files directory of the |
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5 * plug-in that contains this source file. |
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6 * |
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7 * Contributors: |
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8 * IBM Corporation - initial API and implementation |
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9 * Port to the D programming language: |
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10 * Frank Benoit <benoit@tionex.de> |
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11 *******************************************************************************/ |
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12 module org.eclipse.swt.internal.image.JPEGFileFormat; |
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13 |
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14 import org.eclipse.swt.SWT; |
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15 import org.eclipse.swt.internal.image.JPEGFrameHeader; |
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16 import org.eclipse.swt.internal.image.JPEGScanHeader; |
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17 import org.eclipse.swt.internal.image.JPEGHuffmanTable; |
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18 import org.eclipse.swt.internal.image.JPEGAppn; |
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19 import org.eclipse.swt.internal.image.JPEGSegment; |
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20 import org.eclipse.swt.internal.image.FileFormat; |
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21 import org.eclipse.swt.internal.image.JPEGComment; |
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22 import org.eclipse.swt.internal.image.JPEGArithmeticConditioningTable; |
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23 import org.eclipse.swt.internal.image.JPEGRestartInterval; |
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24 import org.eclipse.swt.internal.image.JPEGQuantizationTable; |
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25 import org.eclipse.swt.internal.image.JPEGStartOfImage; |
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26 import org.eclipse.swt.internal.image.JPEGDecoder; |
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27 import org.eclipse.swt.internal.image.JPEGEndOfImage; |
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28 import java.lang.all; |
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29 |
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30 import org.eclipse.swt.graphics.RGB; |
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31 import org.eclipse.swt.graphics.PaletteData; |
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32 |
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33 |
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34 final class JPEGFileFormat : FileFormat { |
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35 int restartInterval; |
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36 JPEGFrameHeader frameHeader; |
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37 int imageWidth, imageHeight; |
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38 int interleavedMcuCols, interleavedMcuRows; |
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39 int maxV, maxH; |
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40 bool progressive; |
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41 int samplePrecision; |
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42 int nComponents; |
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43 int[][] frameComponents; |
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44 int[] componentIds; |
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45 byte[][] imageComponents; |
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46 int[] dataUnit; |
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47 int[][][] dataUnits; |
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48 int[] precedingDCs; |
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49 JPEGScanHeader scanHeader; |
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50 byte[] dataBuffer; |
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51 int currentBitCount; |
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52 int bufferCurrentPosition; |
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53 int restartsToGo; |
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54 int nextRestartNumber; |
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55 JPEGHuffmanTable[] acHuffmanTables; |
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56 JPEGHuffmanTable[] dcHuffmanTables; |
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57 int[][] quantizationTables; |
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58 int currentByte; |
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59 int encoderQFactor = 75; |
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60 int eobrun = 0; |
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61 /* JPEGConstants */ |
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62 public static const int DCTSIZE = 8; |
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63 public static const int DCTSIZESQR = 64; |
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64 /* JPEGFixedPointConstants */ |
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65 public static const int FIX_0_899976223 = 7373; |
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66 public static const int FIX_1_961570560 = 16069; |
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67 public static const int FIX_2_053119869 = 16819; |
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68 public static const int FIX_0_298631336 = 2446; |
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69 public static const int FIX_1_847759065 = 15137; |
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70 public static const int FIX_1_175875602 = 9633; |
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71 public static const int FIX_3_072711026 = 25172; |
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72 public static const int FIX_0_765366865 = 6270; |
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73 public static const int FIX_2_562915447 = 20995; |
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74 public static const int FIX_0_541196100 = 4433; |
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75 public static const int FIX_0_390180644 = 3196; |
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76 public static const int FIX_1_501321110 = 12299; |
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77 /* JPEGMarkerCodes */ |
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78 public static const int APP0 = 0xFFE0; |
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79 public static const int APP15 = 0xFFEF; |
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80 public static const int COM = 0xFFFE; |
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81 public static const int DAC = 0xFFCC; |
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82 public static const int DHP = 0xFFDE; |
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83 public static const int DHT = 0xFFC4; |
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84 public static const int DNL = 0xFFDC; |
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85 public static const int DRI = 0xFFDD; |
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86 public static const int DQT = 0xFFDB; |
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87 public static const int EOI = 0xFFD9; |
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88 public static const int EXP = 0xFFDF; |
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89 public static const int JPG = 0xFFC8; |
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90 public static const int JPG0 = 0xFFF0; |
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91 public static const int JPG13 = 0xFFFD; |
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92 public static const int RST0 = 0xFFD0; |
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93 public static const int RST1 = 0xFFD1; |
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94 public static const int RST2 = 0xFFD2; |
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95 public static const int RST3 = 0xFFD3; |
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96 public static const int RST4 = 0xFFD4; |
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97 public static const int RST5 = 0xFFD5; |
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98 public static const int RST6 = 0xFFD6; |
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99 public static const int RST7 = 0xFFD7; |
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100 public static const int SOF0 = 0xFFC0; |
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101 public static const int SOF1 = 0xFFC1; |
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102 public static const int SOF2 = 0xFFC2; |
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103 public static const int SOF3 = 0xFFC3; |
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104 public static const int SOF5 = 0xFFC5; |
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105 public static const int SOF6 = 0xFFC6; |
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106 public static const int SOF7 = 0xFFC7; |
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107 public static const int SOF9 = 0xFFC9; |
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108 public static const int SOF10 = 0xFFCA; |
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109 public static const int SOF11 = 0xFFCB; |
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110 public static const int SOF13 = 0xFFCD; |
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111 public static const int SOF14 = 0xFFCE; |
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112 public static const int SOF15 = 0xFFCF; |
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113 public static const int SOI = 0xFFD8; |
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114 public static const int SOS = 0xFFDA; |
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115 public static const int TEM = 0xFF01; |
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116 /* JPEGFrameComponentParameterConstants */ |
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117 public static const int TQI = 0; |
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118 public static const int HI = 1; |
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119 public static const int VI = 2; |
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120 public static const int CW = 3; |
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121 public static const int CH = 4; |
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122 /* JPEGScanComponentParameterConstants */ |
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123 public static const int DC = 0; |
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124 public static const int AC = 1; |
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125 /* JFIF Component Constants */ |
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126 public static const int ID_Y = 1 - 1; |
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127 public static const int ID_CB = 2 - 1; |
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128 public static const int ID_CR = 3 - 1; |
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129 public static /*const*/ RGB[] RGB16; |
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130 public static const int[] ExtendTest = [ |
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131 0, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, |
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132 4096, 8192, 16384, 32768, 65536, 131072, 262144 |
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133 ]; |
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134 public static const int[] ExtendOffset = [ |
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135 0, -1, -3, -7, -15, -31, -63, -127, -255, -511, -1023, -2047, |
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136 -4095, -8191, -16383, -32767, -65535, -131071, -262143 |
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137 ]; |
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138 public static const int[] ZigZag8x8 = [ |
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139 0, 1, 8, 16, 9, 2, 3, 10, |
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140 17, 24, 32, 25, 18, 11, 4, 5, |
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141 12, 19, 26, 33, 40, 48, 41, 34, |
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142 27, 20, 13, 6, 7, 14, 21, 28, |
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143 35, 42, 49, 56, 57, 50, 43, 36, |
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144 29, 22, 15, 23, 30, 37, 44, 51, |
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145 58, 59, 52, 45, 38, 31, 39, 46, |
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146 53, 60, 61, 54, 47, 55, 62, 63 |
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147 ]; |
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148 |
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149 public static int[] CrRTable, CbBTable, CrGTable, CbGTable; |
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150 public static int[] RYTable, GYTable, BYTable, |
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151 RCbTable, GCbTable, BCbTable, RCrTable, GCrTable, BCrTable, NBitsTable; |
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152 //public static void static_this() { |
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153 static this() { |
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154 |
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155 RGB16 = [ |
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156 new RGB(0,0,0), |
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157 new RGB(0x80,0,0), |
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158 new RGB(0,0x80,0), |
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159 new RGB(0x80,0x80,0), |
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160 new RGB(0,0,0x80), |
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161 new RGB(0x80,0,0x80), |
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162 new RGB(0,0x80,0x80), |
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163 new RGB(0xC0,0xC0,0xC0), |
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164 new RGB(0x80,0x80,0x80), |
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165 new RGB(0xFF,0,0), |
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166 new RGB(0,0xFF,0), |
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167 new RGB(0xFF,0xFF,0), |
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168 new RGB(0,0,0xFF), |
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169 new RGB(0xFF,0,0xFF), |
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170 new RGB(0,0xFF,0xFF), |
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171 new RGB(0xFF,0xFF,0xFF) |
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172 ]; |
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173 int [] rYTable = new int[256]; |
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174 int [] gYTable = new int[256]; |
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175 int [] bYTable = new int[256]; |
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176 int [] rCbTable = new int[256]; |
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177 int [] gCbTable = new int[256]; |
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178 int [] bCbTable = new int[256]; |
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179 int [] rCrTable = new int[256]; |
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180 int [] gCrTable = new int[256]; |
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181 int [] bCrTable = new int[256]; |
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182 for (int i = 0; i < 256; i++) { |
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183 rYTable[i] = i * 19595; |
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184 gYTable[i] = i * 38470; |
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185 bYTable[i] = i * 7471 + 32768; |
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186 rCbTable[i] = i * -11059; |
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187 gCbTable[i] = i * -21709; |
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188 bCbTable[i] = i * 32768 + 8388608; |
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189 gCrTable[i] = i * -27439; |
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190 bCrTable[i] = i * -5329; |
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191 } |
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192 RYTable = rYTable; |
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193 GYTable = gYTable; |
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194 BYTable = bYTable; |
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195 RCbTable = rCbTable; |
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196 GCbTable = gCbTable; |
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197 BCbTable = bCbTable; |
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198 RCrTable = bCbTable; |
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199 GCrTable = gCrTable; |
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200 BCrTable = bCrTable; |
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201 |
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202 /* Initialize YCbCr-RGB Tables */ |
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203 int [] crRTable = new int[256]; |
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204 int [] cbBTable = new int[256]; |
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205 int [] crGTable = new int[256]; |
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206 int [] cbGTable = new int[256]; |
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207 for (int i = 0; i < 256; i++) { |
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208 int x2 = 2 * i - 255; |
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209 crRTable[i] = (45941 * x2 + 32768) >> 16; |
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210 cbBTable[i] = (58065 * x2 + 32768) >> 16; |
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211 crGTable[i] = -23401 * x2; |
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212 cbGTable[i] = -11277 * x2 + 32768; |
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213 } |
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214 CrRTable = crRTable; |
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215 CbBTable = cbBTable; |
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216 CrGTable = crGTable; |
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217 CbGTable = cbGTable; |
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218 |
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219 /* Initialize BitCount Table */ |
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220 int nBits = 1; |
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221 int power2 = 2; |
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222 int [] nBitsTable = new int[2048]; |
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223 nBitsTable[0] = 0; |
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224 for (int i = 1; i < nBitsTable.length; i++) { |
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225 if (!(i < power2)) { |
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226 nBits++; |
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227 power2 *= 2; |
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228 } |
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229 nBitsTable[i] = nBits; |
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230 } |
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231 NBitsTable = nBitsTable; |
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232 } |
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233 void compress(ImageData image, byte[] dataYComp, byte[] dataCbComp, byte[] dataCrComp) { |
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234 int srcWidth = image.width; |
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235 int srcHeight = image.height; |
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236 int vhFactor = maxV * maxH; |
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237 int[] frameComponent; |
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238 imageComponents = new byte[][](nComponents); |
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239 for (int i = 0; i < nComponents; i++) { |
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240 frameComponent = frameComponents[componentIds[i]]; |
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241 imageComponents[i] = new byte[frameComponent[CW] * frameComponent[CH]]; |
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242 } |
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243 frameComponent = frameComponents[componentIds[ID_Y]]; |
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244 for (int yPos = 0; yPos < srcHeight; yPos++) { |
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245 int srcOfs = yPos * srcWidth; |
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246 int dstOfs = yPos * frameComponent[CW]; |
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247 System.arraycopy(dataYComp, srcOfs, imageComponents[ID_Y], dstOfs, srcWidth); |
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248 } |
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249 frameComponent = frameComponents[componentIds[ID_CB]]; |
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250 for (int yPos = 0; yPos < srcHeight / maxV; yPos++) { |
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251 int destRowIndex = yPos * frameComponent[CW]; |
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252 for (int xPos = 0; xPos < srcWidth / maxH; xPos++) { |
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253 int sum = 0; |
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254 for (int iv = 0; iv < maxV; iv++) { |
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255 int srcIndex = (yPos * maxV + iv) * srcWidth + (xPos * maxH); |
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256 for (int ih = 0; ih < maxH; ih++) { |
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257 sum += dataCbComp[srcIndex + ih] & 0xFF; |
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258 } |
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259 } |
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260 imageComponents[ID_CB][destRowIndex + xPos] = cast(byte)(sum / vhFactor); |
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261 } |
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262 } |
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263 frameComponent = frameComponents[componentIds[ID_CR]]; |
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264 for (int yPos = 0; yPos < srcHeight / maxV; yPos++) { |
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265 int destRowIndex = yPos * frameComponent[CW]; |
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266 for (int xPos = 0; xPos < srcWidth / maxH; xPos++) { |
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267 int sum = 0; |
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268 for (int iv = 0; iv < maxV; iv++) { |
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269 int srcIndex = (yPos * maxV + iv) * srcWidth + (xPos * maxH); |
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270 for (int ih = 0; ih < maxH; ih++) { |
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271 sum += dataCrComp[srcIndex + ih] & 0xFF; |
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272 } |
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273 } |
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274 imageComponents[ID_CR][destRowIndex + xPos] = cast(byte)(sum / vhFactor); |
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275 } |
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276 } |
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277 for (int iComp = 0; iComp < nComponents; iComp++) { |
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278 byte[] imageComponent = imageComponents[iComp]; |
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279 frameComponent = frameComponents[componentIds[iComp]]; |
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280 int hFactor = frameComponent[HI]; |
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281 int vFactor = frameComponent[VI]; |
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282 int componentWidth = frameComponent[CW]; |
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283 int componentHeight = frameComponent[CH]; |
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284 int compressedWidth = srcWidth / (maxH / hFactor); |
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285 int compressedHeight = srcHeight / (maxV / vFactor); |
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286 if (compressedWidth < componentWidth) { |
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287 int delta = componentWidth - compressedWidth; |
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288 for (int yPos = 0; yPos < compressedHeight; yPos++) { |
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289 int dstOfs = ((yPos + 1) * componentWidth - delta); |
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290 int dataValue = imageComponent[(dstOfs > 0) ? dstOfs - 1 : 0] & 0xFF; |
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291 for (int i = 0; i < delta; i++) { |
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292 imageComponent[dstOfs + i] = cast(byte)dataValue; |
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293 } |
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294 } |
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295 } |
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296 if (compressedHeight < componentHeight) { |
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297 int srcOfs = (compressedHeight > 0) ? (compressedHeight - 1) * componentWidth : 1; |
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298 for (int yPos = (compressedHeight > 0) ? compressedHeight : 1; yPos <= componentHeight; yPos++) { |
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299 int dstOfs = (yPos - 1) * componentWidth; |
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300 System.arraycopy(imageComponent, srcOfs, imageComponent, dstOfs, componentWidth); |
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301 } |
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302 } |
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303 } |
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304 } |
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305 void convert4BitRGBToYCbCr(ImageData image) { |
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306 RGB[] rgbs = image.getRGBs(); |
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307 int paletteSize = rgbs.length; |
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308 byte[] yComp = new byte[paletteSize]; |
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309 byte[] cbComp = new byte[paletteSize]; |
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310 byte[] crComp = new byte[paletteSize]; |
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311 int srcWidth = image.width; |
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312 int srcHeight = image.height; |
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313 for (int i = 0; i < paletteSize; i++) { |
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314 RGB color = rgbs[i]; |
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315 int r = color.red; |
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316 int g = color.green; |
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317 int b = color.blue; |
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318 int n = RYTable[r] + GYTable[g] + BYTable[b]; |
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319 yComp[i] = cast(byte)(n >> 16); |
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320 if ((n < 0) && ((n & 0xFFFF) !is 0)) yComp[i]--; |
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321 n = RCbTable[r] + GCbTable[g] + BCbTable[b]; |
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322 cbComp[i] = cast(byte)(n >> 16); |
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323 if ((n < 0) && ((n & 0xFFFF) !is 0)) cbComp[i]--; |
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324 n = RCrTable[r] + GCrTable[g] + BCrTable[b]; |
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325 crComp[i] = cast(byte)(n >> 16); |
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326 if ((n < 0) && ((n & 0xFFFF) !is 0)) crComp[i]--; |
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327 } |
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328 int bSize = srcWidth * srcHeight; |
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329 byte[] dataYComp = new byte[bSize]; |
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330 byte[] dataCbComp = new byte[bSize]; |
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331 byte[] dataCrComp = new byte[bSize]; |
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332 byte[] origData = image.data; |
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333 int bytesPerLine = image.bytesPerLine; |
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334 int maxScanlineByte = srcWidth >> 1; |
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335 for (int yPos = 0; yPos < srcHeight; yPos++) { |
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336 for (int xPos = 0; xPos < maxScanlineByte; xPos++) { |
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337 int srcIndex = yPos * bytesPerLine + xPos; |
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338 int dstIndex = yPos * srcWidth + (xPos * 2); |
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339 int value2 = origData[srcIndex] & 0xFF; |
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340 int value1 = value2 >> 4; |
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341 value2 &= 0x0F; |
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342 dataYComp[dstIndex] = yComp[value1]; |
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343 dataCbComp[dstIndex] = cbComp[value1]; |
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344 dataCrComp[dstIndex] = crComp[value1]; |
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345 dataYComp[dstIndex + 1] = yComp[value2]; |
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346 dataCbComp[dstIndex + 1] = cbComp[value2]; |
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347 dataCrComp[dstIndex + 1] = crComp[value2]; |
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348 } |
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349 } |
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350 compress(image, dataYComp, dataCbComp, dataCrComp); |
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351 } |
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352 void convert8BitRGBToYCbCr(ImageData image) { |
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353 RGB[] rgbs = image.getRGBs(); |
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354 int paletteSize = rgbs.length; |
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355 byte[] yComp = new byte[paletteSize]; |
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356 byte[] cbComp = new byte[paletteSize]; |
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357 byte[] crComp = new byte[paletteSize]; |
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358 int srcWidth = image.width; |
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359 int srcHeight = image.height; |
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360 for (int i = 0; i < paletteSize; i++) { |
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361 RGB color = rgbs[i]; |
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362 int r = color.red; |
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363 int g = color.green; |
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364 int b = color.blue; |
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365 int n = RYTable[r] + GYTable[g] + BYTable[b]; |
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366 yComp[i] = cast(byte)(n >> 16); |
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367 if ((n < 0) && ((n & 0xFFFF) !is 0)) yComp[i]--; |
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368 n = RCbTable[r] + GCbTable[g] + BCbTable[b]; |
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369 cbComp[i] = cast(byte)(n >> 16); |
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370 if ((n < 0) && ((n & 0xFFFF) !is 0)) cbComp[i]--; |
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371 n = RCrTable[r] + GCrTable[g] + BCrTable[b]; |
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372 crComp[i] = cast(byte)(n >> 16); |
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373 if ((n < 0) && ((n & 0xFFFF) !is 0)) crComp[i]--; |
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374 } |
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375 int dstWidth = image.width; |
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376 int dstHeight = srcHeight; |
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377 int stride = ((srcWidth + 3) >> 2) << 2; |
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378 int bSize = dstWidth * dstHeight; |
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379 byte[] dataYComp = new byte[bSize]; |
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|
380 byte[] dataCbComp = new byte[bSize]; |
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381 byte[] dataCrComp = new byte[bSize]; |
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382 byte[] origData = image.data; |
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383 for (int yPos = 0; yPos < srcHeight; yPos++) { |
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384 int srcRowIndex = yPos * stride; |
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385 int dstRowIndex = yPos * dstWidth; |
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386 for (int xPos = 0; xPos < srcWidth; xPos++) { |
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387 int value = origData[srcRowIndex + xPos] & 0xFF; |
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388 int dstIndex = dstRowIndex + xPos; |
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389 dataYComp[dstIndex] = yComp[value]; |
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390 dataCbComp[dstIndex] = cbComp[value]; |
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391 dataCrComp[dstIndex] = crComp[value]; |
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392 } |
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parents:
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393 } |
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394 compress(image, dataYComp, dataCbComp, dataCrComp); |
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parents:
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395 } |
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396 byte[] convertCMYKToRGB() { |
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397 /* Unsupported CMYK format. Answer an empty byte array. */ |
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398 return new byte[0]; |
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parents:
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399 } |
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parents:
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400 void convertImageToYCbCr(ImageData image) { |
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parents:
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401 switch (image.depth) { |
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parents:
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402 case 4: |
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403 convert4BitRGBToYCbCr(image); |
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parents:
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404 return; |
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parents:
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405 case 8: |
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406 convert8BitRGBToYCbCr(image); |
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parents:
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407 return; |
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parents:
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408 case 16: |
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parents:
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409 case 24: |
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parents:
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410 case 32: |
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parents:
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411 convertMultiRGBToYCbCr(image); |
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parents:
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412 return; |
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parents:
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413 default: |
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414 SWT.error(SWT.ERROR_UNSUPPORTED_DEPTH); |
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parents:
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415 } |
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parents:
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416 return; |
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parents:
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417 } |
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418 void convertMultiRGBToYCbCr(ImageData image) { |
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419 int srcWidth = image.width; |
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420 int srcHeight = image.height; |
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421 int bSize = srcWidth * srcHeight; |
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parents:
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422 byte[] dataYComp = new byte[bSize]; |
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423 byte[] dataCbComp = new byte[bSize]; |
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424 byte[] dataCrComp = new byte[bSize]; |
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425 PaletteData palette = image.palette; |
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426 int[] buffer = new int[srcWidth]; |
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427 if (palette.isDirect) { |
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428 int redMask = palette.redMask; |
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429 int greenMask = palette.greenMask; |
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430 int blueMask = palette.blueMask; |
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431 int redShift = palette.redShift; |
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432 int greenShift = palette.greenShift; |
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433 int blueShift = palette.blueShift; |
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434 for (int yPos = 0; yPos < srcHeight; yPos++) { |
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435 image.getPixels(0, yPos, srcWidth, buffer, 0); |
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parents:
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436 int dstRowIndex = yPos * srcWidth; |
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437 for (int xPos = 0; xPos < srcWidth; xPos++) { |
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438 int pixel = buffer[xPos]; |
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439 int dstDataIndex = dstRowIndex + xPos; |
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440 int r = pixel & redMask; |
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441 r = (redShift < 0) ? r >>> -redShift : r << redShift; |
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442 int g = pixel & greenMask; |
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443 g = (greenShift < 0) ? g >>> -greenShift : g << greenShift; |
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444 int b = pixel & blueMask; |
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445 b = (blueShift < 0) ? b >>> -blueShift : b << blueShift; |
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446 dataYComp[dstDataIndex] = cast(byte)((RYTable[r] + GYTable[g] + BYTable[b]) >> 16); |
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447 dataCbComp[dstDataIndex] = cast(byte)((RCbTable[r] + GCbTable[g] + BCbTable[b]) >> 16); |
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448 dataCrComp[dstDataIndex] = cast(byte)((RCrTable[r] + GCrTable[g] + BCrTable[b]) >> 16); |
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449 } |
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parents:
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450 } |
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451 } else { |
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452 for (int yPos = 0; yPos < srcHeight; yPos++) { |
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453 image.getPixels(0, yPos, srcWidth, buffer, 0); |
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454 int dstRowIndex = yPos * srcWidth; |
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parents:
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455 for (int xPos = 0; xPos < srcWidth; xPos++) { |
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parents:
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456 int pixel = buffer[xPos]; |
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parents:
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457 int dstDataIndex = dstRowIndex + xPos; |
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parents:
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458 RGB rgb = palette.getRGB(pixel); |
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459 int r = rgb.red; |
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parents:
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460 int g = rgb.green; |
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461 int b = rgb.blue; |
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462 dataYComp[dstDataIndex] = cast(byte)((RYTable[r] + GYTable[g] + BYTable[b]) >> 16); |
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parents:
diff
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463 dataCbComp[dstDataIndex] = cast(byte)((RCbTable[r] + GCbTable[g] + BCbTable[b]) >> 16); |
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parents:
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|
464 dataCrComp[dstDataIndex] = cast(byte)((RCrTable[r] + GCrTable[g] + BCrTable[b]) >> 16); |
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parents:
diff
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|
465 } |
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parents:
diff
changeset
|
466 } |
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parents:
diff
changeset
|
467 } |
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parents:
diff
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|
468 compress(image, dataYComp, dataCbComp, dataCrComp); |
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parents:
diff
changeset
|
469 } |
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parents:
diff
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|
470 byte[] convertYToRGB() { |
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parents:
diff
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|
471 int compWidth = frameComponents[componentIds[ID_Y]][CW]; |
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parents:
diff
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472 int bytesPerLine = (((imageWidth * 8 + 7) / 8) + 3) / 4 * 4; |
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parents:
diff
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|
473 byte[] data = new byte[bytesPerLine * imageHeight]; |
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parents:
diff
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|
474 byte[] yComp = imageComponents[ID_Y]; |
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parents:
diff
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|
475 int destIndex = 0; |
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parents:
diff
changeset
|
476 for (int i = 0; i < imageHeight; i++) { |
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parents:
diff
changeset
|
477 int srcIndex = i * compWidth; |
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parents:
diff
changeset
|
478 for (int j = 0; j < bytesPerLine; j++) { |
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parents:
diff
changeset
|
479 int y = yComp[srcIndex] & 0xFF; |
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parents:
diff
changeset
|
480 if (y < 0) { |
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parents:
diff
changeset
|
481 y = 0; |
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parents:
diff
changeset
|
482 } else { |
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parents:
diff
changeset
|
483 if (y > 255) y = 255; |
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parents:
diff
changeset
|
484 } |
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parents:
diff
changeset
|
485 if (j >= imageWidth) { |
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parents:
diff
changeset
|
486 y = 0; |
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parents:
diff
changeset
|
487 } |
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parents:
diff
changeset
|
488 data[destIndex] = cast(byte)y; |
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parents:
diff
changeset
|
489 srcIndex++; |
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parents:
diff
changeset
|
490 destIndex++; |
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parents:
diff
changeset
|
491 } |
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parents:
diff
changeset
|
492 } |
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parents:
diff
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|
493 return data; |
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parents:
diff
changeset
|
494 } |
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parents:
diff
changeset
|
495 byte[] convertYCbCrToRGB() { |
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parents:
diff
changeset
|
496 /** |
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parents:
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|
497 * Convert existing image components into an RGB format. |
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parents:
diff
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|
498 * YCbCr is defined per CCIR 601-1, except that Cb and Cr are |
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parents:
diff
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|
499 * normalized to the range 0..MAXJSAMPLE rather than -0.5 .. 0.5. |
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parents:
diff
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|
500 * The conversion equations to be implemented are therefore |
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parents:
diff
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|
501 * R = Y + 1.40200 * Cr |
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parents:
diff
changeset
|
502 * G = Y - 0.34414 * Cb - 0.71414 * Cr |
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parents:
diff
changeset
|
503 * B = Y + 1.77200 * Cb |
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parents:
diff
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|
504 * where Cb and Cr represent the incoming values less MAXJSAMPLE/2. |
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parents:
diff
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|
505 * (These numbers are derived from TIFF 6.0 section 21, dated 3-June-92.) |
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parents:
diff
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|
506 * |
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parents:
diff
changeset
|
507 * To avoid floating-point arithmetic, we represent the fractional constants |
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parents:
diff
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|
508 * as integers scaled up by 2^16 (about 4 digits precision); we have to divide |
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parents:
diff
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|
509 * the products by 2^16, with appropriate rounding, to get the correct answer. |
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parents:
diff
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|
510 * Notice that Y, being an integral input, does not contribute any fraction |
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parents:
diff
changeset
|
511 * so it need not participate in the rounding. |
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parents:
diff
changeset
|
512 * |
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parents:
diff
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|
513 * For even more speed, we avoid doing any multiplications in the inner loop |
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parents:
diff
changeset
|
514 * by precalculating the constants times Cb and Cr for all possible values. |
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parents:
diff
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|
515 * For 8-bit JSAMPLEs this is very reasonable (only 256 entries per table); |
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parents:
diff
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|
516 * for 12-bit samples it is still acceptable. It's not very reasonable for |
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parents:
diff
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|
517 * 16-bit samples, but if you want lossless storage you shouldn't be changing |
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parents:
diff
changeset
|
518 * colorspace anyway. |
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parents:
diff
changeset
|
519 * The Cr=>R and Cb=>B values can be rounded to integers in advance; the |
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parents:
diff
changeset
|
520 * values for the G calculation are left scaled up, since we must add them |
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parents:
diff
changeset
|
521 * together before rounding. |
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parents:
diff
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|
522 */ |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
523 int bSize = imageWidth * imageHeight * nComponents; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
524 byte[] rgbData = new byte[bSize]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
525 int destIndex = 0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
526 expandImageComponents(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
527 byte[] yComp = imageComponents[ID_Y]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
528 byte[] cbComp = imageComponents[ID_CB]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
529 byte[] crComp = imageComponents[ID_CR]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
530 int compWidth = frameComponents[componentIds[ID_Y]][CW]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
531 for (int v = 0; v < imageHeight; v++) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
532 int srcIndex = v * compWidth; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
533 for (int i = 0; i < imageWidth; i++) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
534 int y = yComp[srcIndex] & 0xFF; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
535 int cb = cbComp[srcIndex] & 0xFF; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
536 int cr = crComp[srcIndex] & 0xFF; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
537 int r = y + CrRTable[cr]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
538 int g = y + ((CbGTable[cb] + CrGTable[cr]) >> 16); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
539 int b = y + CbBTable[cb]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
540 if (r < 0) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
541 r = 0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
542 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
543 if (r > 255) r = 255; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
544 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
545 if (g < 0) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
546 g = 0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
547 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
548 if (g > 255) g = 255; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
549 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
550 if (b < 0) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
551 b = 0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
552 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
553 if (b > 255) b = 255; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
554 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
555 rgbData[destIndex] = cast(byte)b; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
556 rgbData[destIndex + 1] = cast(byte)g; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
557 rgbData[destIndex + 2] = cast(byte)r; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
558 destIndex += 3; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
559 srcIndex++; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
560 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
561 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
562 return rgbData; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
563 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
564 void decodeACCoefficients(int[] dataUnit, int iComp) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
565 int[] sParams = scanHeader.componentParameters[componentIds[iComp]]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
566 JPEGHuffmanTable acTable = acHuffmanTables[sParams[AC]]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
567 int k = 1; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
568 while (k < 64) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
569 int rs = decodeUsingTable(acTable); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
570 int r = rs >> 4; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
571 int s = rs & 0xF; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
572 if (s is 0) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
573 if (r is 15) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
574 k += 16; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
575 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
576 break; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
577 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
578 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
579 k += r; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
580 int bits = receive(s); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
581 dataUnit[ZigZag8x8[k]] = extendBy(bits, s); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
582 k++; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
583 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
584 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
585 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
586 void decodeACFirstCoefficients(int[] dataUnit, int iComp, int start, int end, int approxBit) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
587 if (eobrun > 0) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
588 eobrun--; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
589 return; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
590 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
591 int[] sParams = scanHeader.componentParameters[componentIds[iComp]]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
592 JPEGHuffmanTable acTable = acHuffmanTables[sParams[AC]]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
593 int k = start; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
594 while (k <= end) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
595 int rs = decodeUsingTable(acTable); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
596 int r = rs >> 4; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
597 int s = rs & 0xF; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
598 if (s is 0) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
599 if (r is 15) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
600 k += 16; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
601 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
602 eobrun = (1 << r) + receive(r) - 1; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
603 break; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
604 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
605 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
606 k += r; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
607 int bits = receive(s); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
608 dataUnit[ZigZag8x8[k]] = extendBy(bits, s) << approxBit; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
609 k++; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
610 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
611 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
612 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
613 void decodeACRefineCoefficients(int[] dataUnit, int iComp, int start, int end, int approxBit) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
614 int[] sParams = scanHeader.componentParameters[componentIds[iComp]]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
615 JPEGHuffmanTable acTable = acHuffmanTables[sParams[AC]]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
616 int k = start; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
617 while (k <= end) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
618 if (eobrun > 0) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
619 while (k <= end) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
620 int zzIndex = ZigZag8x8[k]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
621 if (dataUnit[zzIndex] !is 0) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
622 dataUnit[zzIndex] = refineAC(dataUnit[zzIndex], approxBit); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
623 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
624 k++; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
625 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
626 eobrun--; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
627 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
628 int rs = decodeUsingTable(acTable); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
629 int r = rs >> 4; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
630 int s = rs & 0xF; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
631 if (s is 0) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
632 if (r is 15) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
633 int zeros = 0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
634 while (zeros < 16 && k <= end) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
635 int zzIndex = ZigZag8x8[k]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
636 if (dataUnit[zzIndex] !is 0) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
637 dataUnit[zzIndex] = refineAC(dataUnit[zzIndex], approxBit); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
638 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
639 zeros++; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
640 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
641 k++; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
642 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
643 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
644 eobrun = (1 << r) + receive(r); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
645 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
646 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
647 int bit = receive(s); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
648 int zeros = 0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
649 int zzIndex = ZigZag8x8[k]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
650 while ((zeros < r || dataUnit[zzIndex] !is 0) && k <= end) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
651 if (dataUnit[zzIndex] !is 0) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
652 dataUnit[zzIndex] = refineAC(dataUnit[zzIndex], approxBit); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
653 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
654 zeros++; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
655 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
656 k++; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
657 zzIndex = ZigZag8x8[k]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
658 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
659 if (bit !is 0) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
660 dataUnit[zzIndex] = 1 << approxBit; |
6dd524f61e62
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parents:
diff
changeset
|
661 } else { |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
662 dataUnit[zzIndex] = -1 << approxBit; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
663 } |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
664 k++; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
665 } |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
666 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
667 } |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
668 } |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
669 int refineAC(int ac, int approxBit) { |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
670 if (ac > 0) { |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
671 int bit = nextBit(); |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
672 if (bit !is 0) { |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
673 ac += 1 << approxBit; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
674 } |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
675 } else if (ac < 0) { |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
676 int bit = nextBit(); |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
677 if (bit !is 0) { |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
678 ac += -1 << approxBit; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
679 } |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
680 } |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
681 return ac; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
682 } |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
683 void decodeDCCoefficient(int[] dataUnit, int iComp, bool first, int approxBit) { |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
684 int[] sParams = scanHeader.componentParameters[componentIds[iComp]]; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
685 JPEGHuffmanTable dcTable = dcHuffmanTables[sParams[DC]]; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
686 int lastDC = 0; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
687 if (progressive && !first) { |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
688 int bit = nextBit(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
689 lastDC = dataUnit[0] + (bit << approxBit); |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
690 } else { |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
691 lastDC = precedingDCs[iComp]; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
692 int nBits = decodeUsingTable(dcTable); |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
693 if (nBits !is 0) { |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
694 int bits = receive(nBits); |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
695 int diff = extendBy(bits, nBits); |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
696 lastDC += diff; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
697 precedingDCs[iComp] = lastDC; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
698 } |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
699 if (progressive) { |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
700 lastDC = lastDC << approxBit; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
701 } |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
702 } |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
703 dataUnit[0] = lastDC; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
704 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
705 void dequantize(int[] dataUnit, int iComp) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
706 int[] qTable = quantizationTables[frameComponents[componentIds[iComp]][TQI]]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
707 for (int i = 0; i < dataUnit.length; i++) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
708 int zzIndex = ZigZag8x8[i]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
709 dataUnit[zzIndex] = dataUnit[zzIndex] * qTable[i]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
710 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
711 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
712 byte[] decodeImageComponents() { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
713 if (nComponents is 3) { // compIds 1, 2, 3 |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
714 return convertYCbCrToRGB(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
715 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
716 // if (nComponents is 3) { // compIds 1, 4, 5 |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
717 // Unsupported CMYK format. |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
718 // return convertYIQToRGB(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
719 // } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
720 if (nComponents is 4) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
721 return convertCMYKToRGB(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
722 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
723 return convertYToRGB(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
724 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
725 void decodeMCUAtXAndY(int xmcu, int ymcu, int nComponentsInScan, bool first, int start, int end, int approxBit) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
726 for (int iComp = 0; iComp < nComponentsInScan; iComp++) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
727 int scanComponent = iComp; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
728 while (scanHeader.componentParameters[componentIds[scanComponent]] is null) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
729 scanComponent++; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
730 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
731 int[] frameComponent = frameComponents[componentIds[scanComponent]]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
732 int hi = frameComponent[HI]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
733 int vi = frameComponent[VI]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
734 if (nComponentsInScan is 1) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
735 hi = 1; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
736 vi = 1; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
737 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
738 int compWidth = frameComponent[CW]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
739 for (int ivi = 0; ivi < vi; ivi++) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
740 for (int ihi = 0; ihi < hi; ihi++) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
741 if (progressive) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
742 // Progressive: First scan - create a new data unit. |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
743 // Subsequent scans - refine the existing data unit. |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
744 int index = (ymcu * vi + ivi) * compWidth + xmcu * hi + ihi; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
745 dataUnit = dataUnits[scanComponent][index]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
746 if (dataUnit is null) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
747 dataUnit = new int[64]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
748 dataUnits[scanComponent][index] = dataUnit; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
749 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
750 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
751 // Sequential: Clear and reuse the data unit buffer. |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
752 for (int i = 0; i < dataUnit.length; i++) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
753 dataUnit[i] = 0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
754 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
755 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
756 if (!progressive || scanHeader.isDCProgressiveScan()) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
757 decodeDCCoefficient(dataUnit, scanComponent, first, approxBit); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
758 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
759 if (!progressive) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
760 decodeACCoefficients(dataUnit, scanComponent); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
761 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
762 if (scanHeader.isACProgressiveScan()) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
763 if (first) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
764 decodeACFirstCoefficients(dataUnit, scanComponent, start, end, approxBit); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
765 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
766 decodeACRefineCoefficients(dataUnit, scanComponent, start, end, approxBit); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
767 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
768 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
769 if (loader.hasListeners()) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
770 // Dequantization, IDCT, up-sampling and color conversion |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
771 // are done on a copy of the coefficient data in order to |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
772 // display the image incrementally. |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
773 int[] temp = dataUnit; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
774 dataUnit = new int[64]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
775 System.arraycopy(temp, 0, dataUnit, 0, 64); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
776 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
777 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
778 if (!progressive || (progressive && loader.hasListeners())) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
779 dequantize(dataUnit, scanComponent); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
780 inverseDCT(dataUnit); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
781 storeData(dataUnit, scanComponent, xmcu, ymcu, hi, ihi, vi, ivi); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
782 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
783 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
784 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
785 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
786 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
787 void decodeScan() { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
788 if (progressive && !scanHeader.verifyProgressiveScan()) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
789 SWT.error(SWT.ERROR_INVALID_IMAGE); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
790 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
791 int nComponentsInScan = scanHeader.getNumberOfImageComponents(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
792 int mcuRowsInScan = interleavedMcuRows; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
793 int mcusPerRow = interleavedMcuCols; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
794 if (nComponentsInScan is 1) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
795 // Non-interleaved. |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
796 int scanComponent = 0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
797 while (scanHeader.componentParameters[componentIds[scanComponent]] is null) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
798 scanComponent++; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
799 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
800 int[] frameComponent = frameComponents[componentIds[scanComponent]]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
801 int hi = frameComponent[HI]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
802 int vi = frameComponent[VI]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
803 int mcuWidth = DCTSIZE * maxH / hi; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
804 int mcuHeight = DCTSIZE * maxV / vi; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
805 mcusPerRow = (imageWidth + mcuWidth - 1) / mcuWidth; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
806 mcuRowsInScan = (imageHeight + mcuHeight - 1) / mcuHeight; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
807 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
808 bool first = scanHeader.isFirstScan(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
809 int start = scanHeader.getStartOfSpectralSelection(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
810 int end = scanHeader.getEndOfSpectralSelection(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
811 int approxBit = scanHeader.getApproxBitPositionLow(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
812 restartsToGo = restartInterval; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
813 nextRestartNumber = 0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
814 for (int ymcu = 0; ymcu < mcuRowsInScan; ymcu++) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
815 for (int xmcu = 0; xmcu < mcusPerRow; xmcu++) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
816 if (restartInterval !is 0) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
817 if (restartsToGo is 0) processRestartInterval(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
818 restartsToGo--; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
819 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
820 decodeMCUAtXAndY(xmcu, ymcu, nComponentsInScan, first, start, end, approxBit); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
821 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
822 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
823 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
824 int decodeUsingTable(JPEGHuffmanTable huffmanTable) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
825 int i = 0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
826 int[] maxCodes = huffmanTable.getDhMaxCodes(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
827 int[] minCodes = huffmanTable.getDhMinCodes(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
828 int[] valPtrs = huffmanTable.getDhValPtrs(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
829 int[] huffVals = huffmanTable.getDhValues(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
830 int code = nextBit(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
831 while (code > maxCodes[i]) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
832 code = code * 2 + nextBit(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
833 i++; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
834 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
835 int j = valPtrs[i] + code - minCodes[i]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
836 return huffVals[j]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
837 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
838 void emit(int huffCode, int nBits) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
839 if (nBits is 0) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
840 SWT.error(SWT.ERROR_INVALID_IMAGE); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
841 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
842 int[] power2m1 = [ |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
843 1, 3, 7, 15, 31, 63, 127, 255, 511, 1023, 2047, 4095, 8191, |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
844 16383, 32767, 65535, 131125 |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
845 ]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
846 int code = (huffCode & power2m1[nBits - 1]) << (24 - nBits - currentBitCount); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
847 byte[] codeBuffer = new byte[4]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
848 codeBuffer[0] = cast(byte)(code & 0xFF); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
849 codeBuffer[1] = cast(byte)((code >> 8) & 0xFF); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
850 codeBuffer[2] = cast(byte)((code >> 16) & 0xFF); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
851 codeBuffer[3] = cast(byte)((code >> 24) & 0xFF); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
852 int abs = nBits - (8 - currentBitCount); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
853 if (abs < 0) abs = -abs; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
854 if ((abs >> 3) > 0) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
855 currentByte += codeBuffer[2]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
856 emitByte(cast(byte)currentByte); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
857 emitByte(codeBuffer[1]); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
858 currentByte = codeBuffer[0]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
859 currentBitCount += nBits - 16; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
860 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
861 currentBitCount += nBits; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
862 if (currentBitCount >= 8) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
863 currentByte += codeBuffer[2]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
864 emitByte(cast(byte)currentByte); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
865 currentByte = codeBuffer[1]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
866 currentBitCount -= 8; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
867 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
868 currentByte += codeBuffer[2]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
869 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
870 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
871 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
872 void emitByte(byte byteValue) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
873 if (bufferCurrentPosition >= 512) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
874 resetOutputBuffer(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
875 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
876 dataBuffer[bufferCurrentPosition] = byteValue; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
877 bufferCurrentPosition++; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
878 if (byteValue is -1) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
879 emitByte(cast(byte)0); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
880 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
881 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
882 void encodeACCoefficients(int[] dataUnit, int iComp) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
883 int[] sParams = scanHeader.componentParameters[iComp]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
884 JPEGHuffmanTable acTable = acHuffmanTables[sParams[AC]]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
885 int[] ehCodes = acTable.ehCodes; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
886 byte[] ehSizes = acTable.ehCodeLengths; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
887 int r = 0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
888 int k = 1; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
889 while (k < 64) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
890 k++; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
891 int acValue = dataUnit[ZigZag8x8[k - 1]]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
892 if (acValue is 0) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
893 if (k is 64) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
894 emit(ehCodes[0], ehSizes[0] & 0xFF); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
895 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
896 r++; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
897 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
898 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
899 while (r > 15) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
900 emit(ehCodes[0xF0], ehSizes[0xF0] & 0xFF); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
901 r -= 16; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
902 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
903 if (acValue < 0) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
904 int absACValue = acValue; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
905 if (absACValue < 0) absACValue = -absACValue; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
906 int nBits = NBitsTable[absACValue]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
907 int rs = r * 16 + nBits; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
908 emit(ehCodes[rs], ehSizes[rs] & 0xFF); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
909 emit(0xFFFFFF - absACValue, nBits); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
910 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
911 int nBits = NBitsTable[acValue]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
912 int rs = r * 16 + nBits; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
913 emit(ehCodes[rs], ehSizes[rs] & 0xFF); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
914 emit(acValue, nBits); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
915 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
916 r = 0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
917 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
918 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
919 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
920 void encodeDCCoefficients(int[] dataUnit, int iComp) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
921 int[] sParams = scanHeader.componentParameters[iComp]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
922 JPEGHuffmanTable dcTable = dcHuffmanTables[sParams[DC]]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
923 int lastDC = precedingDCs[iComp]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
924 int dcValue = dataUnit[0]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
925 int diff = dcValue - lastDC; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
926 precedingDCs[iComp] = dcValue; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
927 if (diff < 0) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
928 int absDiff = 0 - diff; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
929 int nBits = NBitsTable[absDiff]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
930 emit(dcTable.ehCodes[nBits], dcTable.ehCodeLengths[nBits]); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
931 emit(0xFFFFFF - absDiff, nBits); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
932 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
933 int nBits = NBitsTable[diff]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
934 emit(dcTable.ehCodes[nBits], dcTable.ehCodeLengths[nBits]); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
935 if (nBits !is 0) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
936 emit(diff, nBits); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
937 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
938 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
939 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
940 void encodeMCUAtXAndY(int xmcu, int ymcu) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
941 int nComponentsInScan = scanHeader.getNumberOfImageComponents(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
942 dataUnit = new int[64]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
943 for (int iComp = 0; iComp < nComponentsInScan; iComp++) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
944 int[] frameComponent = frameComponents[componentIds[iComp]]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
945 int hi = frameComponent[HI]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
946 int vi = frameComponent[VI]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
947 for (int ivi = 0; ivi < vi; ivi++) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
948 for (int ihi = 0; ihi < hi; ihi++) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
949 extractData(dataUnit, iComp, xmcu, ymcu, ihi, ivi); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
950 forwardDCT(dataUnit); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
951 quantizeData(dataUnit, iComp); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
952 encodeDCCoefficients(dataUnit, iComp); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
953 encodeACCoefficients(dataUnit, iComp); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
954 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
955 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
956 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
957 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
958 void encodeScan() { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
959 for (int ymcu = 0; ymcu < interleavedMcuRows; ymcu++) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
960 for (int xmcu = 0; xmcu < interleavedMcuCols; xmcu++) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
961 encodeMCUAtXAndY(xmcu, ymcu); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
962 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
963 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
964 if (currentBitCount !is 0) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
965 emitByte(cast(byte)currentByte); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
966 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
967 resetOutputBuffer(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
968 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
969 void expandImageComponents() { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
970 for (int iComp = 0; iComp < nComponents; iComp++) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
971 int[] frameComponent = frameComponents[componentIds[iComp]]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
972 int hi = frameComponent[HI]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
973 int vi = frameComponent[VI]; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
974 int upH = maxH / hi; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
975 int upV = maxV / vi; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
976 if ((upH * upV) > 1) { |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
977 byte[] component = imageComponents[iComp]; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
978 int compWidth = frameComponent[CW]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
979 int compHeight = frameComponent[CH]; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
980 int upCompWidth = compWidth * upH; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
981 int upCompHeight = compHeight * upV; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
982 ImageData src = new ImageData(compWidth, compHeight, 8, new PaletteData(RGB16), 4, component); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
983 ImageData dest = src.scaledTo(upCompWidth, upCompHeight); |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
984 imageComponents[iComp] = dest.data; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
985 } |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
986 } |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
987 } |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
988 int extendBy(int diff, int t) { |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
989 if (diff < ExtendTest[t]) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
990 return diff + ExtendOffset[t]; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
991 } else { |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
992 return diff; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
993 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
994 } |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
995 void extractData(int[] dataUnit, int iComp, int xmcu, int ymcu, int ihi, int ivi) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
996 byte[] compImage = imageComponents[iComp]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
997 int[] frameComponent = frameComponents[componentIds[iComp]]; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
998 int hi = frameComponent[HI]; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
999 int vi = frameComponent[VI]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1000 int compWidth = frameComponent[CW]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1001 int srcIndex = ((ymcu * vi + ivi) * compWidth * DCTSIZE) + ((xmcu * hi + ihi) * DCTSIZE); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1002 int destIndex = 0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1003 for (int i = 0; i < DCTSIZE; i++) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1004 for (int col = 0; col < DCTSIZE; col++) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1005 dataUnit[destIndex] = (compImage[srcIndex + col] & 0xFF) - 128; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1006 destIndex++; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1007 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1008 srcIndex += compWidth; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1009 } |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1010 } |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1011 void forwardDCT(int[] dataUnit) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1012 for (int row = 0; row < 8; row++) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1013 int rIndex = row * DCTSIZE; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1014 int tmp0 = dataUnit[rIndex] + dataUnit[rIndex + 7]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1015 int tmp7 = dataUnit[rIndex] - dataUnit[rIndex + 7]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1016 int tmp1 = dataUnit[rIndex + 1] + dataUnit[rIndex + 6]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1017 int tmp6 = dataUnit[rIndex + 1] - dataUnit[rIndex + 6]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1018 int tmp2 = dataUnit[rIndex + 2] + dataUnit[rIndex + 5]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1019 int tmp5 = dataUnit[rIndex + 2] - dataUnit[rIndex + 5]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1020 int tmp3 = dataUnit[rIndex + 3] + dataUnit[rIndex + 4]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1021 int tmp4 = dataUnit[rIndex + 3] - dataUnit[rIndex + 4]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1022 |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1023 /** |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1024 * Even part per LL&M figure 1 --- note that published figure |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1025 * is faulty; rotator 'sqrt(2)*c1' should be 'sqrt(2)*c6'. |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1026 */ |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1027 int tmp10 = tmp0 + tmp3; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1028 int tmp13 = tmp0 - tmp3; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1029 int tmp11 = tmp1 + tmp2; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1030 int tmp12 = tmp1 - tmp2; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1031 |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1032 dataUnit[rIndex] = (tmp10 + tmp11) * 4; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1033 dataUnit[rIndex + 4] = (tmp10 - tmp11) * 4; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1034 |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1035 int z1 = (tmp12 + tmp13) * FIX_0_541196100; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1036 int n = z1 + (tmp13 * FIX_0_765366865) + 1024; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1037 dataUnit[rIndex + 2] = n >> 11; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1038 if ((n < 0) && ((n & 0x07FF) !is 0)) dataUnit[rIndex + 2]--; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1039 n = z1 + (tmp12 * (0 - FIX_1_847759065)) + 1024; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1040 dataUnit[rIndex + 6] = n >> 11; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1041 if ((n < 0) && ((n & 0x07FF) !is 0)) dataUnit[rIndex + 6]--; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1042 |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1043 /** |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1044 * Odd part per figure 8 --- note paper omits factor of sqrt(2). |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1045 * cK represents cos(K*pi/16). |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1046 * i0..i3 in the paper are tmp4..tmp7 here. |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1047 */ |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1048 z1 = tmp4 + tmp7; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1049 int z2 = tmp5 + tmp6; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1050 int z3 = tmp4 + tmp6; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1051 int z4 = tmp5 + tmp7; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1052 int z5 = (z3 + z4) * FIX_1_175875602; // sqrt(2) * c3 |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1053 |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1054 tmp4 *= FIX_0_298631336; // sqrt(2) * (-c1+c3+c5-c7) |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1055 tmp5 *= FIX_2_053119869; // sqrt(2) * ( c1+c3-c5+c7) |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1056 tmp6 *= FIX_3_072711026; // sqrt(2) * ( c1+c3+c5-c7) |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1057 tmp7 *= FIX_1_501321110; // sqrt(2) * ( c1+c3-c5-c7) |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1058 z1 *= 0 - FIX_0_899976223; // sqrt(2) * (c7-c3) |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1059 z2 *= 0 - FIX_2_562915447; // sqrt(2) * (-c1-c3) |
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Frank Benoit <benoit@tionex.de>
parents:
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|
1060 z3 *= 0 - FIX_1_961570560; // sqrt(2) * (-c3-c5) |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1061 z4 *= 0 - FIX_0_390180644; // sqrt(2) * (c5-c3) |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1062 |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1063 z3 += z5; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1064 z4 += z5; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1065 |
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parents:
diff
changeset
|
1066 n = tmp4 + z1 + z3 + 1024; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1067 dataUnit[rIndex + 7] = n >> 11; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1068 if ((n < 0) && ((n & 0x07FF) !is 0)) dataUnit[rIndex + 7]--; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1069 n = tmp5 + z2 + z4 + 1024; |
6dd524f61e62
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parents:
diff
changeset
|
1070 dataUnit[rIndex + 5] = n >> 11; |
6dd524f61e62
add dwt win and basic java stuff
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parents:
diff
changeset
|
1071 if ((n < 0) && ((n & 0x07FF) !is 0)) dataUnit[rIndex + 5]--; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1072 n = tmp6 + z2 + z3 + 1024; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1073 dataUnit[rIndex + 3] = n >> 11; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1074 if ((n < 0) && ((n & 0x07FF) !is 0)) dataUnit[rIndex + 3]--; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1075 n = tmp7 + z1 + z4 + 1024; |
6dd524f61e62
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parents:
diff
changeset
|
1076 dataUnit[rIndex + 1] = n >> 11; |
6dd524f61e62
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parents:
diff
changeset
|
1077 if ((n < 0) && ((n & 0x07FF) !is 0)) dataUnit[rIndex + 1]--; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1078 } |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1079 |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1080 /** |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1081 * Pass 2: process columns. |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
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|
1082 * Note that we must descale the results by a factor of 8 is 2**3, |
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parents:
diff
changeset
|
1083 * and also undo the PASS1_BITS scaling. |
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parents:
diff
changeset
|
1084 */ |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1085 for (int col = 0; col < 8; col++) { |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1086 int c0 = col; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1087 int c1 = col + 8; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1088 int c2 = col + 16; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1089 int c3 = col + 24; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1090 int c4 = col + 32; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1091 int c5 = col + 40; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1092 int c6 = col + 48; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1093 int c7 = col + 56; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1094 int tmp0 = dataUnit[c0] + dataUnit[c7]; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1095 int tmp7 = dataUnit[c0] - dataUnit[c7]; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1096 int tmp1 = dataUnit[c1] + dataUnit[c6]; |
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parents:
diff
changeset
|
1097 int tmp6 = dataUnit[c1] - dataUnit[c6]; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1098 int tmp2 = dataUnit[c2] + dataUnit[c5]; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1099 int tmp5 = dataUnit[c2] - dataUnit[c5]; |
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parents:
diff
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|
1100 int tmp3 = dataUnit[c3] + dataUnit[c4]; |
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parents:
diff
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|
1101 int tmp4 = dataUnit[c3] - dataUnit[c4]; |
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parents:
diff
changeset
|
1102 |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1103 /** |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1104 * Even part per LL&M figure 1 --- note that published figure |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1105 * is faulty; rotator 'sqrt(2)*c1' should be 'sqrt(2)*c6'. |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1106 */ |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1107 int tmp10 = tmp0 + tmp3; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1108 int tmp13 = tmp0 - tmp3; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1109 int tmp11 = tmp1 + tmp2; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1110 int tmp12 = tmp1 - tmp2; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1111 |
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Frank Benoit <benoit@tionex.de>
parents:
diff
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|
1112 int n = tmp10 + tmp11 + 16; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1113 dataUnit[c0] = n >> 5; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1114 if ((n < 0) && ((n & 0x1F) !is 0)) dataUnit[c0]--; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1115 n = tmp10 - tmp11 + 16; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1116 dataUnit[c4] = n >> 5; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1117 if ((n < 0) && ((n & 0x1F) !is 0)) dataUnit[c4]--; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1118 |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1119 int z1 = (tmp12 + tmp13) * FIX_0_541196100; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1120 n = z1 + (tmp13 * FIX_0_765366865) + 131072; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1121 dataUnit[c2] = n >> 18; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1122 if ((n < 0) && ((n & 0x3FFFF) !is 0)) dataUnit[c2]--; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1123 n = z1 + (tmp12 * (0 - FIX_1_847759065)) + 131072; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1124 dataUnit[c6] = n >> 18; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1125 if ((n < 0) && ((n & 0x3FFFF) !is 0)) dataUnit[c6]--; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1126 |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1127 /** |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1128 * Odd part per figure 8 --- note paper omits factor of sqrt(2). |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1129 * cK represents cos(K*pi/16). |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1130 * i0..i3 in the paper are tmp4..tmp7 here. |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1131 */ |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1132 z1 = tmp4 + tmp7; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1133 int z2 = tmp5 + tmp6; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1134 int z3 = tmp4 + tmp6; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1135 int z4 = tmp5 + tmp7; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1136 int z5 = (z3 + z4) * FIX_1_175875602; // sqrt(2) * c3 |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1137 |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1138 tmp4 *= FIX_0_298631336; // sqrt(2) * (-c1+c3+c5-c7) |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1139 tmp5 *= FIX_2_053119869; // sqrt(2) * ( c1+c3-c5+c7) |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1140 tmp6 *= FIX_3_072711026; // sqrt(2) * ( c1+c3+c5-c7) |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1141 tmp7 *= FIX_1_501321110; // sqrt(2) * ( c1+c3-c5-c7) |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1142 z1 *= 0 - FIX_0_899976223; // sqrt(2) * (c7-c3) |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1143 z2 *= 0 - FIX_2_562915447; // sqrt(2) * (-c1-c3) |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1144 z3 *= 0 - FIX_1_961570560; // sqrt(2) * (-c3-c5) |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1145 z4 *= 0 - FIX_0_390180644; // sqrt(2) * (c5-c3) |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1146 |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1147 z3 += z5; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1148 z4 += z5; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1149 |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1150 n = tmp4 + z1 + z3 + 131072; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1151 dataUnit[c7] = n >> 18; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1152 if ((n < 0) && ((n & 0x3FFFF) !is 0)) dataUnit[c7]--; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1153 n = tmp5 + z2 + z4 + 131072; |
6dd524f61e62
add dwt win and basic java stuff
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parents:
diff
changeset
|
1154 dataUnit[c5] = n >> 18; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1155 if ((n < 0) && ((n & 0x3FFFF) !is 0)) dataUnit[c5]--; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1156 n = tmp6 + z2 + z3 + 131072; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1157 dataUnit[c3] = n >> 18; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1158 if ((n < 0) && ((n & 0x3FFFF) !is 0)) dataUnit[c3]--; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1159 n = tmp7 + z1 + z4 + 131072; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1160 dataUnit[c1] = n >> 18; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1161 if ((n < 0) && ((n & 0x3FFFF) !is 0)) dataUnit[c1]--; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1162 } |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1163 } |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1164 void getAPP0() { |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1165 JPEGAppn appn = new JPEGAppn(inputStream); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1166 if (!appn.verify()) { |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1167 SWT.error(SWT.ERROR_INVALID_IMAGE); |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1168 } |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1169 } |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1170 void getCOM() { |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1171 new JPEGComment(inputStream); |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1172 } |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1173 void getDAC() { |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1174 new JPEGArithmeticConditioningTable(inputStream); |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1175 } |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1176 void getDHT() { |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1177 JPEGHuffmanTable dht = new JPEGHuffmanTable(inputStream); |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1178 if (!dht.verify()) { |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1179 SWT.error(SWT.ERROR_INVALID_IMAGE); |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1180 } |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1181 if (acHuffmanTables is null) { |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1182 acHuffmanTables = new JPEGHuffmanTable[4]; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1183 } |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1184 if (dcHuffmanTables is null) { |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1185 dcHuffmanTables = new JPEGHuffmanTable[4]; |
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1186 } |
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1187 JPEGHuffmanTable[] dhtTables = dht.getAllTables(); |
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1188 for (int i = 0; i < dhtTables.length; i++) { |
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parents:
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1189 JPEGHuffmanTable dhtTable = dhtTables[i]; |
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1190 if (dhtTable.getTableClass() is 0) { |
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diff
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|
1191 dcHuffmanTables[dhtTable.getTableIdentifier()] = dhtTable; |
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parents:
diff
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|
1192 } else { |
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parents:
diff
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|
1193 acHuffmanTables[dhtTable.getTableIdentifier()] = dhtTable; |
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parents:
diff
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|
1194 } |
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parents:
diff
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|
1195 } |
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Frank Benoit <benoit@tionex.de>
parents:
diff
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|
1196 } |
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Frank Benoit <benoit@tionex.de>
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diff
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|
1197 void getDNL() { |
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Frank Benoit <benoit@tionex.de>
parents:
diff
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|
1198 new JPEGRestartInterval(inputStream); |
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parents:
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|
1199 } |
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Frank Benoit <benoit@tionex.de>
parents:
diff
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|
1200 void getDQT() { |
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Frank Benoit <benoit@tionex.de>
parents:
diff
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|
1201 JPEGQuantizationTable dqt = new JPEGQuantizationTable(inputStream); |
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parents:
diff
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|
1202 int[][] currentTables = quantizationTables; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
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|
1203 if (currentTables is null) { |
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Frank Benoit <benoit@tionex.de>
parents:
diff
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|
1204 currentTables = new int[][](4); |
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parents:
diff
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|
1205 } |
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add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
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|
1206 int[] dqtTablesKeys = dqt.getQuantizationTablesKeys(); |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
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|
1207 int[][] dqtTablesValues = dqt.getQuantizationTablesValues(); |
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Frank Benoit <benoit@tionex.de>
parents:
diff
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|
1208 for (int i = 0; i < dqtTablesKeys.length; i++) { |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1209 int index = dqtTablesKeys[i]; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1210 currentTables[index] = dqtTablesValues[i]; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
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|
1211 } |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1212 quantizationTables = currentTables; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
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|
1213 } |
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Frank Benoit <benoit@tionex.de>
parents:
diff
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|
1214 void getDRI() { |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1215 JPEGRestartInterval dri = new JPEGRestartInterval(inputStream); |
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Frank Benoit <benoit@tionex.de>
parents:
diff
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|
1216 if (!dri.verify()) { |
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Frank Benoit <benoit@tionex.de>
parents:
diff
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|
1217 SWT.error(SWT.ERROR_INVALID_IMAGE); |
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parents:
diff
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|
1218 } |
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Frank Benoit <benoit@tionex.de>
parents:
diff
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|
1219 restartInterval = dri.getRestartInterval(); |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1220 } |
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Frank Benoit <benoit@tionex.de>
parents:
diff
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|
1221 void inverseDCT(int[] dataUnit) { |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1222 for (int row = 0; row < 8; row++) { |
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Frank Benoit <benoit@tionex.de>
parents:
diff
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|
1223 int rIndex = row * DCTSIZE; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1224 /** |
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Frank Benoit <benoit@tionex.de>
parents:
diff
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|
1225 * Due to quantization, we will usually find that many of the input |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1226 * coefficients are zero, especially the AC terms. We can exploit this |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1227 * by short-circuiting the IDCT calculation for any row in which all |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1228 * the AC terms are zero. In that case each output is equal to the |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1229 * DC coefficient (with scale factor as needed). |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1230 * With typical images and quantization tables, half or more of the |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1231 * row DCT calculations can be simplified this way. |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1232 */ |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1233 if (isZeroInRow(dataUnit, rIndex)) { |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1234 int dcVal = dataUnit[rIndex] << 2; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1235 for (int i = rIndex + 7; i >= rIndex; i--) { |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1236 dataUnit[i] = dcVal; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1237 } |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1238 } else { |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1239 /** |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1240 * Even part: reverse the even part of the forward DCT. |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1241 * The rotator is sqrt(2)*c(-6). |
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parents:
diff
changeset
|
1242 */ |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1243 int z2 = dataUnit[rIndex + 2]; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1244 int z3 = dataUnit[rIndex + 6]; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1245 int z1 = (z2 + z3) * FIX_0_541196100; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1246 int tmp2 = z1 + (z3 * (0 - FIX_1_847759065)); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1247 int tmp3 = z1 + (z2 * FIX_0_765366865); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1248 int tmp0 = (dataUnit[rIndex] + dataUnit[rIndex + 4]) << 13; |
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add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1249 int tmp1 = (dataUnit[rIndex] - dataUnit[rIndex + 4]) << 13; |
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add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1250 int tmp10 = tmp0 + tmp3; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1251 int tmp13 = tmp0 - tmp3; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1252 int tmp11 = tmp1 + tmp2; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1253 int tmp12 = tmp1 - tmp2; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1254 /** |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1255 * Odd part per figure 8; the matrix is unitary and hence its |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1256 * transpose is its inverse. i0..i3 are y7,y5,y3,y1 respectively. |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1257 */ |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1258 tmp0 = dataUnit[rIndex + 7]; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1259 tmp1 = dataUnit[rIndex + 5]; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1260 tmp2 = dataUnit[rIndex + 3]; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1261 tmp3 = dataUnit[rIndex + 1]; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1262 z1 = tmp0 + tmp3; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1263 z2 = tmp1 + tmp2; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1264 z3 = tmp0 + tmp2; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1265 int z4 = tmp1 + tmp3; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1266 int z5 = (z3 + z4) * FIX_1_175875602; /* sqrt(2) * c3 */ |
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add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1267 |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1268 tmp0 *= FIX_0_298631336; /* sqrt(2) * (-c1+c3+c5-c7) */ |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1269 tmp1 *= FIX_2_053119869; /* sqrt(2) * ( c1+c3-c5+c7) */ |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1270 tmp2 *= FIX_3_072711026; /* sqrt(2) * ( c1+c3+c5-c7) */ |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1271 tmp3 *= FIX_1_501321110; /* sqrt(2) * ( c1+c3-c5-c7) */ |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1272 z1 *= 0 - FIX_0_899976223; /* sqrt(2) * (c7-c3) */ |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1273 z2 *= 0 - FIX_2_562915447; /* sqrt(2) * (-c1-c3) */ |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1274 z3 *= 0 - FIX_1_961570560; /* sqrt(2) * (-c3-c5) */ |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1275 z4 *= 0 - FIX_0_390180644; /* sqrt(2) * (c5-c3) */ |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1276 |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1277 z3 += z5; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1278 z4 += z5; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1279 tmp0 += z1 + z3; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1280 tmp1 += z2 + z4; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1281 tmp2 += z2 + z3; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1282 tmp3 += z1 + z4; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1283 |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1284 dataUnit[rIndex] = (tmp10 + tmp3 + 1024) >> 11; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1285 dataUnit[rIndex + 7] = (tmp10 - tmp3 + 1024) >> 11; |
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parents:
diff
changeset
|
1286 dataUnit[rIndex + 1] = (tmp11 + tmp2 + 1024) >> 11; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1287 dataUnit[rIndex + 6] = (tmp11 - tmp2 + 1024) >> 11; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1288 dataUnit[rIndex + 2] = (tmp12 + tmp1 + 1024) >> 11; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1289 dataUnit[rIndex + 5] = (tmp12 - tmp1 + 1024) >> 11; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1290 dataUnit[rIndex + 3] = (tmp13 + tmp0 + 1024) >> 11; |
6dd524f61e62
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parents:
diff
changeset
|
1291 dataUnit[rIndex + 4] = (tmp13 - tmp0 + 1024) >> 11; |
6dd524f61e62
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parents:
diff
changeset
|
1292 } |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1293 } |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1294 /** |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1295 * Pass 2: process columns. |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1296 * Note that we must descale the results by a factor of 8 is 2**3, |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1297 * and also undo the PASS1_BITS scaling. |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1298 */ |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1299 for (int col = 0; col < 8; col++) { |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1300 int c0 = col; |
6dd524f61e62
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parents:
diff
changeset
|
1301 int c1 = col + 8; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1302 int c2 = col + 16; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1303 int c3 = col + 24; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1304 int c4 = col + 32; |
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parents:
diff
changeset
|
1305 int c5 = col + 40; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1306 int c6 = col + 48; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1307 int c7 = col + 56; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1308 if (isZeroInColumn(dataUnit, col)) { |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1309 int dcVal = (dataUnit[c0] + 16) >> 5; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1310 dataUnit[c0] = dcVal; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1311 dataUnit[c1] = dcVal; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1312 dataUnit[c2] = dcVal; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1313 dataUnit[c3] = dcVal; |
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add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1314 dataUnit[c4] = dcVal; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1315 dataUnit[c5] = dcVal; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1316 dataUnit[c6] = dcVal; |
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add dwt win and basic java stuff
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parents:
diff
changeset
|
1317 dataUnit[c7] = dcVal; |
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parents:
diff
changeset
|
1318 } else { |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1319 /** |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1320 * Even part: reverse the even part of the forward DCT. |
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add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1321 * The rotator is sqrt(2)*c(-6). |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1322 */ |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1323 int z0 = dataUnit[c0]; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1324 int z2 = dataUnit[c2]; |
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add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1325 int z3 = dataUnit[c6]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1326 int z4 = dataUnit[c4]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1327 int z1 = (z2 + z3) * FIX_0_541196100; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1328 int tmp2 = z1 + (z3 * (0 - FIX_1_847759065)); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1329 int tmp3 = z1 + (z2 * FIX_0_765366865); |
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add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1330 int tmp0 = (z0 + z4) << 13; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1331 int tmp1 = (z0 - z4) << 13; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1332 int tmp10 = tmp0 + tmp3; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1333 int tmp13 = tmp0 - tmp3; |
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add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1334 int tmp11 = tmp1 + tmp2; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1335 int tmp12 = tmp1 - tmp2; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1336 /** |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1337 * Odd part per figure 8; the matrix is unitary and hence its |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1338 * transpose is its inverse. i0..i3 are y7,y5,y3,y1 respectively. |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1339 */ |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1340 tmp0 = dataUnit[c7]; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1341 tmp1 = dataUnit[c5]; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1342 tmp2 = dataUnit[c3]; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1343 tmp3 = dataUnit[c1]; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1344 z1 = tmp0 + tmp3; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1345 z2 = tmp1 + tmp2; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1346 z3 = tmp0 + tmp2; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1347 z4 = tmp1 + tmp3; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1348 z0 = (z3 + z4) * FIX_1_175875602; /* sqrt(2) * c3 */ |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1349 |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1350 tmp0 *= FIX_0_298631336; /* sqrt(2) * (-c1+c3+c5-c7) */ |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1351 tmp1 *= FIX_2_053119869; /* sqrt(2) * ( c1+c3-c5+c7) */ |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1352 tmp2 *= FIX_3_072711026; /* sqrt(2) * ( c1+c3+c5-c7) */ |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1353 tmp3 *= FIX_1_501321110; /* sqrt(2) * ( c1+c3-c5-c7) */ |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1354 z1 *= 0 - FIX_0_899976223; /* sqrt(2) * (c7-c3) */ |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1355 z2 *= 0 - FIX_2_562915447; /* sqrt(2) * (-c1-c3) */ |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1356 z3 *= 0 - FIX_1_961570560; /* sqrt(2) * (-c3-c5) */ |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1357 z4 *= 0 - FIX_0_390180644; /* sqrt(2) * (c5-c3) */ |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1358 |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1359 z3 += z0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1360 z4 += z0; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1361 |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1362 tmp0 += z1 + z3; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1363 tmp1 += z2 + z4; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1364 tmp2 += z2 + z3; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1365 tmp3 += z1 + z4; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1366 |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1367 /* Final output stage: inputs are tmp10..tmp13, tmp0..tmp3 */ |
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add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1368 dataUnit[c0] = (tmp10 + tmp3 + 131072) >> 18; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1369 dataUnit[c7] = (tmp10 - tmp3 + 131072) >> 18; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1370 dataUnit[c1] = (tmp11 + tmp2 + 131072) >> 18; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1371 dataUnit[c6] = (tmp11 - tmp2 + 131072) >> 18; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1372 dataUnit[c2] = (tmp12 + tmp1 + 131072) >> 18; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1373 dataUnit[c5] = (tmp12 - tmp1 + 131072) >> 18; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1374 dataUnit[c3] = (tmp13 + tmp0 + 131072) >> 18; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1375 dataUnit[c4] = (tmp13 - tmp0 + 131072) >> 18; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1376 } |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1377 } |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1378 } |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1379 override bool isFileFormat(LEDataInputStream stream) { |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1380 try { |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1381 JPEGStartOfImage soi = new JPEGStartOfImage(stream); |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1382 stream.unread(soi.reference); |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1383 return soi.verify(); // we no longer check for appN |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1384 } catch (Exception e) { |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1385 return false; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1386 } |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1387 } |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1388 bool isZeroInColumn(int[] dataUnit, int col) { |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1389 return dataUnit[col + 8] is 0 && dataUnit[col + 16] is 0 |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1390 && dataUnit[col + 24] is 0 && dataUnit[col + 32] is 0 |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1391 && dataUnit[col + 40] is 0 && dataUnit[col + 48] is 0 |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1392 && dataUnit[col + 56] is 0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1393 } |
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add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1394 bool isZeroInRow(int[] dataUnit, int rIndex) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1395 return dataUnit[rIndex + 1] is 0 && dataUnit[rIndex + 2] is 0 |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1396 && dataUnit[rIndex + 3] is 0 && dataUnit[rIndex + 4] is 0 |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1397 && dataUnit[rIndex + 5] is 0 && dataUnit[rIndex + 6] is 0 |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1398 && dataUnit[rIndex + 7] is 0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1399 } |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1400 override ImageData[] loadFromByteStream() { |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1401 //TEMPORARY CODE |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1402 //PORTING_FIXME |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1403 if (/+System.getProperty("org.eclipse.swt.internal.image.JPEGFileFormat_3.2") is null+/ true ) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1404 return JPEGDecoder.loadFromByteStream(inputStream, loader); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1405 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1406 JPEGStartOfImage soi = new JPEGStartOfImage(inputStream); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1407 if (!soi.verify()) SWT.error(SWT.ERROR_INVALID_IMAGE); |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1408 restartInterval = 0; |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1409 |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1410 /* Process the tables preceding the frame header. */ |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1411 processTables(); |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1412 |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1413 /* Start of Frame. */ |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1414 frameHeader = new JPEGFrameHeader(inputStream); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1415 if (!frameHeader.verify()) SWT.error(SWT.ERROR_INVALID_IMAGE); |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1416 imageWidth = frameHeader.getSamplesPerLine(); |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1417 imageHeight = frameHeader.getNumberOfLines(); |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1418 maxH = frameHeader.getMaxHFactor(); |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1419 maxV = frameHeader.getMaxVFactor(); |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1420 int mcuWidth = maxH * DCTSIZE; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1421 int mcuHeight = maxV * DCTSIZE; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1422 interleavedMcuCols = (imageWidth + mcuWidth - 1) / mcuWidth; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1423 interleavedMcuRows = (imageHeight + mcuHeight - 1) / mcuHeight; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1424 progressive = frameHeader.isProgressive(); |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1425 samplePrecision = frameHeader.getSamplePrecision(); |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1426 nComponents = frameHeader.getNumberOfImageComponents(); |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1427 frameComponents = frameHeader.componentParameters; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1428 componentIds = frameHeader.componentIdentifiers; |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1429 imageComponents = new byte[][](nComponents); |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1430 if (progressive) { |
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1431 // Progressive jpeg: need to keep all of the data units. |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1432 dataUnits = new int[][][](nComponents); |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1433 } else { |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1434 // Sequential jpeg: only need one data unit. |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1435 dataUnit = new int[8 * 8]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1436 } |
6dd524f61e62
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Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1437 for (int i = 0; i < nComponents; i++) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1438 int[] frameComponent = frameComponents[componentIds[i]]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1439 int bufferSize = frameComponent[CW] * frameComponent[CH]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1440 imageComponents[i] = new byte[bufferSize]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1441 if (progressive) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1442 dataUnits[i] = new int[][](bufferSize); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1443 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1444 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1445 |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1446 /* Process the tables preceding the scan header. */ |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1447 processTables(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1448 |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1449 /* Start of Scan. */ |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1450 scanHeader = new JPEGScanHeader(inputStream); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1451 if (!scanHeader.verify()) SWT.error(SWT.ERROR_INVALID_IMAGE); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1452 |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1453 /* Process scan(s) and further tables until EOI. */ |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1454 int progressiveScanCount = 0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1455 bool done = false; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1456 while(!done) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1457 resetInputBuffer(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1458 precedingDCs = new int[4]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1459 decodeScan(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1460 if (progressive && loader.hasListeners()) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1461 ImageData imageData = createImageData(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1462 loader.notifyListeners(new ImageLoaderEvent(loader, imageData, progressiveScanCount, false)); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1463 progressiveScanCount++; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1464 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1465 |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1466 /* Unread any buffered data before looking for tables again. */ |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1467 int delta = 512 - bufferCurrentPosition - 1; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1468 if (delta > 0) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1469 byte[] unreadBuffer = new byte[delta]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1470 System.arraycopy(dataBuffer, bufferCurrentPosition + 1, unreadBuffer, 0, delta); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1471 try { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1472 inputStream.unread(unreadBuffer); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1473 } catch (IOException e) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1474 SWT.error(SWT.ERROR_IO, e); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1475 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1476 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1477 |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1478 /* Process the tables preceding the next scan header. */ |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1479 JPEGSegment jpegSegment = processTables(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1480 if (jpegSegment is null || jpegSegment.getSegmentMarker() is EOI) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1481 done = true; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1482 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1483 scanHeader = new JPEGScanHeader(inputStream); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1484 if (!scanHeader.verify()) SWT.error(SWT.ERROR_INVALID_IMAGE); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1485 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1486 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1487 |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1488 if (progressive) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1489 for (int ymcu = 0; ymcu < interleavedMcuRows; ymcu++) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1490 for (int xmcu = 0; xmcu < interleavedMcuCols; xmcu++) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1491 for (int iComp = 0; iComp < nComponents; iComp++) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1492 int[] frameComponent = frameComponents[componentIds[iComp]]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1493 int hi = frameComponent[HI]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1494 int vi = frameComponent[VI]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1495 int compWidth = frameComponent[CW]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1496 for (int ivi = 0; ivi < vi; ivi++) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1497 for (int ihi = 0; ihi < hi; ihi++) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1498 int index = (ymcu * vi + ivi) * compWidth + xmcu * hi + ihi; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1499 dataUnit = dataUnits[iComp][index]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1500 dequantize(dataUnit, iComp); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1501 inverseDCT(dataUnit); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1502 storeData(dataUnit, iComp, xmcu, ymcu, hi, ihi, vi, ivi); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1503 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1504 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1505 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1506 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1507 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1508 dataUnits = null; // release memory |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1509 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1510 ImageData imageData = createImageData(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1511 if (progressive && loader.hasListeners()) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1512 loader.notifyListeners(new ImageLoaderEvent(loader, imageData, progressiveScanCount, true)); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1513 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1514 return [imageData]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1515 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1516 ImageData createImageData() { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1517 return ImageData.internal_new( |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1518 imageWidth, |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1519 imageHeight, |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1520 nComponents * samplePrecision, |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1521 setUpPalette(), |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1522 nComponents is 1 ? 4 : 1, |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1523 decodeImageComponents(), |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1524 0, |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1525 null, |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1526 null, |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1527 -1, |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1528 -1, |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1529 SWT.IMAGE_JPEG, |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1530 0, |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1531 0, |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1532 0, |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1533 0); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1534 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1535 int nextBit() { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1536 if (currentBitCount !is 0) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1537 currentBitCount--; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1538 currentByte *= 2; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1539 if (currentByte > 255) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1540 currentByte -= 256; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1541 return 1; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1542 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1543 return 0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1544 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1545 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1546 bufferCurrentPosition++; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1547 if (bufferCurrentPosition >= 512) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1548 resetInputBuffer(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1549 bufferCurrentPosition = 0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1550 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1551 currentByte = dataBuffer[bufferCurrentPosition] & 0xFF; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1552 currentBitCount = 8; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1553 byte nextByte; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1554 if (bufferCurrentPosition is 511) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1555 resetInputBuffer(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1556 currentBitCount = 8; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1557 nextByte = dataBuffer[0]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1558 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1559 nextByte = dataBuffer[bufferCurrentPosition + 1]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1560 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1561 if (currentByte is 0xFF) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1562 if (nextByte is 0) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1563 bufferCurrentPosition ++; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1564 currentBitCount--; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1565 currentByte *= 2; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1566 if (currentByte > 255) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1567 currentByte -= 256; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1568 return 1; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1569 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1570 return 0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1571 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1572 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1573 if ((nextByte & 0xFF) + 0xFF00 is DNL) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1574 getDNL(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1575 return 0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1576 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1577 SWT.error(SWT.ERROR_INVALID_IMAGE); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1578 return 0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1579 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1580 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1581 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1582 currentBitCount--; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1583 currentByte *= 2; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1584 if (currentByte > 255) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1585 currentByte -= 256; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1586 return 1; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1587 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1588 return 0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1589 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1590 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1591 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1592 void processRestartInterval() { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1593 do { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1594 bufferCurrentPosition++; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1595 if (bufferCurrentPosition > 511) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1596 resetInputBuffer(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1597 bufferCurrentPosition = 0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1598 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1599 currentByte = dataBuffer[bufferCurrentPosition] & 0xFF; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1600 } while (currentByte !is 0xFF); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1601 while (currentByte is 0xFF) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1602 bufferCurrentPosition++; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1603 if (bufferCurrentPosition > 511) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1604 resetInputBuffer(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1605 bufferCurrentPosition = 0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1606 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1607 currentByte = dataBuffer[bufferCurrentPosition] & 0xFF; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1608 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1609 if (currentByte !is ((RST0 + nextRestartNumber) & 0xFF)) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1610 SWT.error(SWT.ERROR_INVALID_IMAGE); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1611 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1612 bufferCurrentPosition++; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1613 if (bufferCurrentPosition > 511) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1614 resetInputBuffer(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1615 bufferCurrentPosition = 0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1616 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1617 currentByte = dataBuffer[bufferCurrentPosition] & 0xFF; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1618 currentBitCount = 8; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1619 restartsToGo = restartInterval; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1620 nextRestartNumber = (nextRestartNumber + 1) & 0x7; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1621 precedingDCs = new int[4]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1622 eobrun = 0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1623 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1624 /* Process all markers until a frame header, scan header, or EOI is found. */ |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1625 JPEGSegment processTables() { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1626 while (true) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1627 JPEGSegment jpegSegment = seekUnspecifiedMarker(inputStream); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1628 if (jpegSegment is null) return null; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1629 JPEGFrameHeader sof = new JPEGFrameHeader(jpegSegment.reference); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1630 if (sof.verify()) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1631 return jpegSegment; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1632 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1633 int marker = jpegSegment.getSegmentMarker(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1634 switch (marker) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1635 case SOI: // there should only be one SOI per file |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1636 SWT.error(SWT.ERROR_INVALID_IMAGE); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1637 case EOI: |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1638 case SOS: |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1639 return jpegSegment; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1640 case DQT: |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1641 getDQT(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1642 break; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1643 case DHT: |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1644 getDHT(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1645 break; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1646 case DAC: |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1647 getDAC(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1648 break; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1649 case DRI: |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1650 getDRI(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1651 break; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1652 case APP0: |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1653 getAPP0(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1654 break; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1655 case COM: |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1656 getCOM(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1657 break; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1658 default: |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1659 skipSegmentFrom(inputStream); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1660 |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1661 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1662 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1663 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1664 void quantizeData(int[] dataUnit, int iComp) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1665 int[] qTable = quantizationTables[frameComponents[componentIds[iComp]][TQI]]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1666 for (int i = 0; i < dataUnit.length; i++) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1667 int zzIndex = ZigZag8x8[i]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1668 int data = dataUnit[zzIndex]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1669 int absData = data < 0 ? 0 - data : data; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1670 int qValue = qTable[i]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1671 int q2 = qValue >> 1; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1672 absData += q2; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1673 if (absData < qValue) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1674 dataUnit[zzIndex] = 0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1675 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1676 absData /= qValue; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1677 if (data >= 0) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1678 dataUnit[zzIndex] = absData; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1679 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1680 dataUnit[zzIndex] = 0 - absData; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1681 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1682 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1683 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1684 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1685 int receive(int nBits) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1686 int v = 0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1687 for (int i = 0; i < nBits; i++) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1688 v = v * 2 + nextBit(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1689 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1690 return v; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1691 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1692 void resetInputBuffer() { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1693 if (dataBuffer is null) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1694 dataBuffer = new byte[512]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1695 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1696 try { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1697 inputStream.read(dataBuffer); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1698 } catch (IOException e) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1699 SWT.error(SWT.ERROR_IO, e); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1700 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1701 currentBitCount = 0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1702 bufferCurrentPosition = -1; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1703 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1704 void resetOutputBuffer() { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1705 if (dataBuffer is null) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1706 dataBuffer = new byte[512]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1707 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1708 try { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1709 outputStream.write(dataBuffer, 0, bufferCurrentPosition); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1710 } catch (IOException e) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1711 SWT.error(SWT.ERROR_IO, e); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1712 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1713 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1714 bufferCurrentPosition = 0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1715 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1716 static JPEGSegment seekUnspecifiedMarker(LEDataInputStream byteStream) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1717 byte[] byteArray = new byte[2]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1718 try { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1719 while (true) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1720 if (byteStream.read(byteArray, 0, 1) !is 1) return null; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1721 if (byteArray[0] is cast(byte) 0xFF) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1722 if (byteStream.read(byteArray, 1, 1) !is 1) return null; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1723 if (byteArray[1] !is cast(byte) 0xFF && byteArray[1] !is 0) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1724 byteStream.unread(byteArray); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1725 return new JPEGSegment(byteArray); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1726 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1727 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1728 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1729 } catch (IOException e) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1730 SWT.error(SWT.ERROR_IO, e); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1731 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1732 return null; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1733 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1734 PaletteData setUpPalette() { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1735 if (nComponents is 1) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1736 RGB[] entries = new RGB[256]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1737 for (int i = 0; i < 256; i++) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1738 entries[i] = new RGB(i, i, i); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1739 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1740 return new PaletteData(entries); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1741 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1742 return new PaletteData(0xFF, 0xFF00, 0xFF0000); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1743 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1744 static void skipSegmentFrom(LEDataInputStream byteStream) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1745 try { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1746 byte[] byteArray = new byte[4]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1747 JPEGSegment jpegSegment = new JPEGSegment(byteArray); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1748 |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1749 if (byteStream.read(byteArray) !is byteArray.length) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1750 SWT.error(SWT.ERROR_INVALID_IMAGE); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1751 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1752 if (!(byteArray[0] is -1 && byteArray[1] !is 0 && byteArray[1] !is -1)) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1753 SWT.error(SWT.ERROR_INVALID_IMAGE); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1754 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1755 int delta = jpegSegment.getSegmentLength() - 2; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1756 byteStream.skip(delta); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1757 } catch (Exception e) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1758 SWT.error(SWT.ERROR_IO, e); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1759 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1760 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1761 void storeData(int[] dataUnit, int iComp, int xmcu, int ymcu, int hi, int ihi, int vi, int ivi) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1762 byte[] compImage = imageComponents[iComp]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1763 int[] frameComponent = frameComponents[componentIds[iComp]]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1764 int compWidth = frameComponent[CW]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1765 int destIndex = ((ymcu * vi + ivi) * compWidth * DCTSIZE) + ((xmcu * hi + ihi) * DCTSIZE); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1766 int srcIndex = 0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1767 for (int i = 0; i < DCTSIZE; i++) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1768 for (int col = 0; col < DCTSIZE; col++) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1769 int x = dataUnit[srcIndex] + 128; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1770 if (x < 0) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1771 x = 0; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1772 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1773 if (x > 255) x = 255; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1774 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1775 compImage[destIndex + col] = cast(byte)x; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1776 srcIndex++; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1777 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1778 destIndex += compWidth; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1779 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1780 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1781 override void unloadIntoByteStream(ImageLoader loader) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1782 ImageData image = loader.data[0]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1783 if (!(new JPEGStartOfImage()).writeToStream(outputStream)) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1784 SWT.error(SWT.ERROR_IO); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1785 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1786 JPEGAppn appn = new JPEGAppn([cast(byte)0xFF, cast(byte)0xE0, 0, 0x10, 0x4A, 0x46, 0x49, 0x46, 0, 1, 1, 0, 0, 1, 0, 1, 0, 0]); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1787 if (!appn.writeToStream(outputStream)) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1788 SWT.error(SWT.ERROR_IO); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1789 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1790 quantizationTables = new int[][](4); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1791 JPEGQuantizationTable chromDQT = JPEGQuantizationTable.defaultChrominanceTable(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1792 chromDQT.scaleBy(encoderQFactor); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1793 int[] jpegDQTKeys = chromDQT.getQuantizationTablesKeys(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1794 int[][] jpegDQTValues = chromDQT.getQuantizationTablesValues(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1795 for (int i = 0; i < jpegDQTKeys.length; i++) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1796 quantizationTables[jpegDQTKeys[i]] = jpegDQTValues[i]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1797 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1798 JPEGQuantizationTable lumDQT = JPEGQuantizationTable.defaultLuminanceTable(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1799 lumDQT.scaleBy(encoderQFactor); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1800 jpegDQTKeys = lumDQT.getQuantizationTablesKeys(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1801 jpegDQTValues = lumDQT.getQuantizationTablesValues(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1802 for (int i = 0; i < jpegDQTKeys.length; i++) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1803 quantizationTables[jpegDQTKeys[i]] = jpegDQTValues[i]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1804 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1805 if (!lumDQT.writeToStream(outputStream)) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1806 SWT.error(SWT.ERROR_IO); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1807 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1808 if (!chromDQT.writeToStream(outputStream)) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1809 SWT.error(SWT.ERROR_IO); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1810 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1811 int frameLength, scanLength, precision; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1812 int[][] frameParams, scanParams; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1813 if (image.depth is 1) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1814 frameLength = 11; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1815 frameParams = new int[][](1); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1816 frameParams[0] = [1, 1, 1, 0, 0]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1817 scanParams = new int[][](1); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1818 scanParams[0] = [0, 0]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1819 scanLength = 8; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1820 nComponents = 1; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1821 precision = 1; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1822 } else { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1823 frameLength = 17; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1824 frameParams = new int[][](3); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1825 frameParams[0] = [0, 2, 2, 0, 0]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1826 frameParams[1] = [1, 1, 1, 0, 0]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1827 frameParams[2] = [1, 1, 1, 0, 0]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1828 scanParams = new int[][](3); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1829 scanParams[0] = [0, 0]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1830 scanParams[1] = [1, 1]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1831 scanParams[2] = [1, 1]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1832 scanLength = 12; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1833 nComponents = 3; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1834 precision = 8; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1835 } |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1836 imageWidth = image.width; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1837 imageHeight = image.height; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1838 frameHeader = new JPEGFrameHeader(new byte[19]); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1839 frameHeader.setSegmentMarker(SOF0); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1840 frameHeader.setSegmentLength(frameLength); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1841 frameHeader.setSamplePrecision(precision); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1842 frameHeader.setSamplesPerLine(imageWidth); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1843 frameHeader.setNumberOfLines(imageHeight); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1844 frameHeader.setNumberOfImageComponents(nComponents); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1845 frameHeader.componentParameters = frameParams; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1846 frameHeader.componentIdentifiers = [0, 1, 2]; |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1847 frameHeader.initializeContents(); |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1848 if (!frameHeader.writeToStream(outputStream)) { |
6dd524f61e62
add dwt win and basic java stuff
Frank Benoit <benoit@tionex.de>
parents:
diff
changeset
|
1849 SWT.error(SWT.ERROR_IO); |
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1850 } |
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1851 frameComponents = frameParams; |
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1852 componentIds = frameHeader.componentIdentifiers; |
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1853 maxH = frameHeader.getMaxHFactor(); |
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1854 maxV = frameHeader.getMaxVFactor(); |
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1855 int mcuWidth = maxH * DCTSIZE; |
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1856 int mcuHeight = maxV * DCTSIZE; |
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1857 interleavedMcuCols = (imageWidth + mcuWidth - 1) / mcuWidth; |
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1858 interleavedMcuRows = (imageHeight + mcuHeight - 1) / mcuHeight; |
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1859 acHuffmanTables = new JPEGHuffmanTable[4]; |
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1860 dcHuffmanTables = new JPEGHuffmanTable[4]; |
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1861 JPEGHuffmanTable[] dhtTables = [ |
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1862 JPEGHuffmanTable.getDefaultDCLuminanceTable(), |
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1863 JPEGHuffmanTable.getDefaultDCChrominanceTable(), |
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1864 JPEGHuffmanTable.getDefaultACLuminanceTable(), |
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1865 JPEGHuffmanTable.getDefaultACChrominanceTable() |
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1866 ]; |
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1867 for (int i = 0; i < dhtTables.length; i++) { |
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1868 JPEGHuffmanTable dhtTable = dhtTables[i]; |
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1869 if (!dhtTable.writeToStream(outputStream)) { |
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1870 SWT.error(SWT.ERROR_IO); |
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1871 } |
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1872 JPEGHuffmanTable[] allTables = dhtTable.getAllTables(); |
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1873 for (int j = 0; j < allTables.length; j++) { |
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1874 JPEGHuffmanTable huffmanTable = allTables[j]; |
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1875 if (huffmanTable.getTableClass() is 0) { |
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1876 dcHuffmanTables[huffmanTable.getTableIdentifier()] = huffmanTable; |
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1877 } else { |
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1878 acHuffmanTables[huffmanTable.getTableIdentifier()] = huffmanTable; |
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1879 } |
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1880 } |
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1881 } |
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1882 precedingDCs = new int[4]; |
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1883 scanHeader = new JPEGScanHeader(new byte[14]); |
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1884 scanHeader.setSegmentMarker(SOS); |
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1885 scanHeader.setSegmentLength(scanLength); |
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1886 scanHeader.setNumberOfImageComponents(nComponents); |
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1887 scanHeader.setStartOfSpectralSelection(0); |
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1888 scanHeader.setEndOfSpectralSelection(63); |
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1889 scanHeader.componentParameters = scanParams; |
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1890 scanHeader.initializeContents(); |
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1891 if (!scanHeader.writeToStream(outputStream)) { |
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1892 SWT.error(SWT.ERROR_IO); |
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1893 } |
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1894 convertImageToYCbCr(image); |
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1895 resetOutputBuffer(); |
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1896 currentByte = 0; |
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1897 currentBitCount = 0; |
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1898 encodeScan(); |
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1899 if (!(new JPEGEndOfImage()).writeToStream(outputStream)) { |
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1900 SWT.error(SWT.ERROR_IO); |
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1901 } |
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1902 } |
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1903 } |