1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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4 | // * * |
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5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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7 | // * conditions of the Geant4 Software License, included in the file * |
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8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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9 | // * include a list of copyright holders. * |
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10 | // * * |
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11 | // * Neither the authors of this software system, nor their employing * |
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12 | // * institutes,nor the agencies providing financial support for this * |
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13 | // * work make any representation or warranty, express or implied, * |
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14 | // * regarding this software system or assume any liability for its * |
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15 | // * use. Please see the license in the file LICENSE and URL above * |
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16 | // * for the full disclaimer and the limitation of liability. * |
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17 | // * * |
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18 | // * This code implementation is the result of the scientific and * |
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19 | // * technical work of the GEANT4 collaboration. * |
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20 | // * By using, copying, modifying or distributing the software (or * |
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21 | // * any work based on the software) you agree to acknowledge its * |
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22 | // * use in resulting scientific publications, and indicate your * |
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23 | // * acceptance of all terms of the Geant4 Software license. * |
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24 | // ******************************************************************** |
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25 | // |
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26 | // |
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27 | // $Id: G4RTJpegCoder.cc,v 1.6 2006/06/29 21:23:55 gunter Exp $ |
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28 | // GEANT4 tag $Name: geant4-09-04-beta-01 $ |
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29 | // |
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30 | // |
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31 | // |
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32 | |
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33 | #include <stdlib.h> |
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34 | #include <string.h> |
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35 | #include <cmath> |
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36 | |
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37 | #include "G4RTJpeg.hh" |
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38 | #include "G4RTOutBitStream.hh" |
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39 | #include "G4RTJpegMaker.hh" |
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40 | #include "G4RTJpegCoder.hh" |
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41 | #include "G4RTJpegCoderTables.hh" |
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42 | |
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43 | |
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44 | G4JpegCoder::G4JpegCoder(u_char* colorR,u_char* colorG,u_char* colorB) |
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45 | { |
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46 | mRgb[0] = colorR; |
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47 | mRgb[1] = colorG; |
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48 | mRgb[2] = colorB; |
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49 | |
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50 | mPreDC[0] = mPreDC[1] = mPreDC[2] = 0; |
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51 | mOBSP = 0; |
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52 | |
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53 | for(int n=0; n<8; n++) |
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54 | for(int m=0; m<8; m++) |
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55 | mCosT[n][m] = std::cos((2 * m + 1) * n * PaiDiv16); |
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56 | } |
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57 | |
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58 | G4JpegCoder::~G4JpegCoder(void) |
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59 | { |
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60 | if(mOBSP != 0) |
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61 | delete mOBSP; |
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62 | } |
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63 | |
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64 | void |
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65 | G4JpegCoder::GetJpegData(char** aJpegData, int& size) |
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66 | { |
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67 | if (mOBSP != 0){ |
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68 | *aJpegData = (char*)mOBSP->GetStreamAddress(); |
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69 | size = mOBSP->GetStreamSize(); |
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70 | } |
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71 | else{ |
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72 | *aJpegData = 0; |
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73 | size = 0; |
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74 | } |
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75 | |
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76 | } |
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77 | |
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78 | int |
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79 | G4JpegCoder::DoCoding(void) |
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80 | { |
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81 | mNumVUnits = (mProperty.nRow / 16) + ((mProperty.nRow % 16) ? 1 : 0); |
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82 | mNumHUnits = (mProperty.nColumn / 16) + ((mProperty.nColumn % 16) ? 1 : 0); |
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83 | |
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84 | int size = mProperty.nColumn * mProperty.nRow * 3; |
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85 | if(size < 10240) |
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86 | size = 10240; |
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87 | |
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88 | try{ |
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89 | mOBSP = new G4OutBitStream(size); |
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90 | WriteHeader(); |
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91 | for(int yu=0; yu<mNumVUnits; yu++){ |
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92 | for(int xu=0; xu<mNumHUnits; xu++){ |
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93 | makeYCC(xu, yu); |
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94 | |
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95 | //mRgb->YCrCb |
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96 | #ifdef GRAY |
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97 | for(int i=0; i<64; i++) |
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98 | mCbBlock[i] = mCrBlock[i] = 0; |
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99 | #endif |
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100 | CodeMCU(); |
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101 | } |
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102 | } |
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103 | WriteEOI(); |
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104 | return M_NoError; |
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105 | } |
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106 | |
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107 | catch(G4MemoryError &me){ |
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108 | return M_RuntimeError; |
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109 | } |
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110 | catch(G4BufferError &be){ |
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111 | return M_RuntimeError; |
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112 | } |
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113 | catch(G4IndexError &ie){ |
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114 | return M_RuntimeError; |
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115 | } |
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116 | } |
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117 | |
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118 | //MCU |
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119 | void |
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120 | G4JpegCoder::CodeMCU(void) |
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121 | { |
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122 | for(int n=0; n<4; n++){ |
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123 | ForwardDCT(mYBlock[n]); |
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124 | Quantization(0); |
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125 | CodeHuffman(0); |
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126 | } |
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127 | ForwardDCT(mCbBlock); |
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128 | Quantization(1); |
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129 | CodeHuffman(1); |
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130 | |
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131 | ForwardDCT(mCrBlock); |
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132 | Quantization(2); |
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133 | CodeHuffman(2); |
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134 | } |
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135 | |
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136 | void |
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137 | G4JpegCoder::makeYCC(int ux, int uy) |
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138 | { |
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139 | u_char rv, gv, bv; |
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140 | int tCrBlock[4][64]; |
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141 | int tCbBlock[4][64]; |
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142 | |
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143 | for(int u=0; u<4; u++){ |
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144 | int *yp = mYBlock[u]; |
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145 | int *cbp = tCbBlock[u]; |
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146 | int *crp = tCrBlock[u]; |
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147 | |
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148 | int sx = ux * 16 + ((u&1) ? 8 : 0); |
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149 | int ex = sx + 8; |
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150 | int sy = uy * 16 + ((u>1) ? 8 : 0); |
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151 | int ey = sy + 8; |
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152 | |
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153 | for(int iv=sy; iv<ey; iv++){ |
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154 | int ii = iv < mProperty.nRow ? iv : mProperty.nRow - 1; |
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155 | for(int ih=sx; ih<ex; ih++){ |
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156 | int jj = ih < mProperty.nColumn ? ih : mProperty.nColumn - 1; |
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157 | int index = ii * mProperty.nColumn + jj; |
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158 | rv = mRgb[0][index]; |
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159 | gv = mRgb[1][index]; |
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160 | bv = mRgb[2][index]; |
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161 | |
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162 | *yp++ = int((0.2990 * rv) + (0.5870 * gv) + (0.1140 * bv) - 128) |
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163 | ; |
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164 | *cbp++ = int(-(0.1687 * rv) - (0.3313 * gv) + (0.5000 * bv)); |
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165 | *crp++ = int((0.5000 * rv) - (0.4187 * gv) - (0.0813 * bv)); |
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166 | } // ih |
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167 | } //iv |
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168 | } //u |
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169 | |
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170 | int n = 0; |
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171 | for(int b=0; b<4; b++){ |
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172 | switch(b){ |
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173 | case 0: n=0; break; |
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174 | case 1: n=4; break; |
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175 | case 2: n=32; break; |
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176 | case 3: n=36; |
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177 | } |
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178 | for(int y=0; y<8; y+=2){ |
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179 | for(int x=0; x<8; x+=2){ |
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180 | int idx = y * 8 + x; |
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181 | mCrBlock[n] = tCrBlock[b][idx]; |
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182 | mCbBlock[n] = tCbBlock[b][idx]; |
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183 | n++; |
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184 | } |
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185 | n += 4; |
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186 | } |
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187 | } |
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188 | } |
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189 | |
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190 | void |
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191 | G4JpegCoder::CodeHuffman(int cs) |
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192 | { |
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193 | const G4HuffmanCodeTable& dcT = cs ? CDcHuffmanT : YDcHuffmanT; |
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194 | const G4HuffmanCodeTable& acT = cs ? CAcHuffmanT : YAcHuffmanT; |
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195 | const int eobIdx = cs ? CEOBidx : YEOBidx; |
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196 | const int zrlIdx = cs ? CZRLidx : YZRLidx; |
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197 | |
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198 | int diff = mDCTData[0] - mPreDC[cs]; |
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199 | mPreDC[cs] = mDCTData[0]; |
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200 | int absDiff = std::abs(diff); |
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201 | int dIdx = 0; |
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202 | |
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203 | while(absDiff > 0){ |
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204 | absDiff >>= 1; |
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205 | dIdx++; |
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206 | } |
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207 | if(dIdx > dcT.numOfElement) |
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208 | throw(G4IndexError(dcT.numOfElement, dIdx, "CodeHuffman:DC")); |
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209 | mOBSP->SetBits((dcT.CodeT)[dIdx], (dcT.SizeT)[dIdx]); |
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210 | |
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211 | if(dIdx){ |
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212 | if(diff < 0) |
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213 | diff--; |
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214 | mOBSP->SetBits(diff, dIdx); |
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215 | } |
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216 | |
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217 | int run = 0; |
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218 | for(int n=1; n<64; n++){ |
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219 | int absCoefficient = std::abs( mDCTData[ Zigzag[n] ] ); |
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220 | if( absCoefficient ){ |
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221 | while( run > 15 ){ |
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222 | mOBSP->SetBits((acT.CodeT)[zrlIdx], (acT.SizeT)[zrlIdx]); |
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223 | run -= 16; |
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224 | } |
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225 | int s = 0; |
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226 | while( absCoefficient > 0 ){ |
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227 | absCoefficient >>= 1; |
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228 | s++; |
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229 | } |
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230 | int aIdx = run * 10 + s + (run == 15); |
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231 | if( aIdx >= acT.numOfElement ) |
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232 | throw( G4IndexError( acT.numOfElement, aIdx, "CodeHuffman:AC" ) |
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233 | ); |
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234 | mOBSP->SetBits( (acT.CodeT)[aIdx], (acT.SizeT)[aIdx] ); |
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235 | int v = mDCTData[ Zigzag[n] ]; |
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236 | if( v < 0 ) |
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237 | v--; |
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238 | mOBSP->SetBits( v, s ); |
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239 | run = 0; |
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240 | } |
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241 | else{ |
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242 | if(n == 63) |
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243 | mOBSP->SetBits( (acT.CodeT)[eobIdx], (acT.SizeT)[eobIdx] ); |
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244 | else |
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245 | run++; |
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246 | } |
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247 | } |
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248 | } |
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249 | |
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250 | |
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251 | void |
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252 | G4JpegCoder::Quantization(int cs) |
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253 | { |
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254 | int* qt = (int*)(cs ? CQuantumT : YQuantumT); |
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255 | for( int i=0; i<64; i++ ){ |
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256 | mDCTData[i] /= qt[i]; |
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257 | } |
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258 | } |
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259 | |
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260 | |
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261 | void |
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262 | G4JpegCoder::ForwardDCT(int* picData) |
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263 | { |
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264 | for( int v=0; v<8; v++ ){ |
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265 | double cv = v ? 1.0 : DisSqrt2; |
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266 | for( int u=0; u<8; u++ ){ |
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267 | double cu = u ? 1.0 : DisSqrt2; |
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268 | double sum = 0; |
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269 | |
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270 | for( int y=0; y<8; y++ ) |
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271 | for( int x=0; x<8; x++ ) |
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272 | sum += picData[ y * 8 + x ] * mCosT[u][x] * mCosT[v][y]; |
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273 | mDCTData[ v * 8 + u ] = int( sum * cu * cv / 4 ); |
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274 | } |
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275 | } |
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276 | } |
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277 | |
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278 | |
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279 | void |
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280 | G4JpegCoder::WriteHeader( void ) |
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281 | { |
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282 | int i = 0; //counter |
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283 | //SOI |
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284 | mOBSP->SetByte( M_Marker ); //FF |
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285 | mOBSP->SetByte( M_SOI ); //SOI |
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286 | |
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287 | //APP0(JFIF Header) |
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288 | mOBSP->SetByte( M_Marker ); //FF |
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289 | mOBSP->SetByte( M_APP0 ); //APP0 |
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290 | mOBSP->SetWord( JFIFLength ); //parameter |
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291 | mOBSP->CopyByte( (char*)JFIF, 5 ); //"JFIF\0" |
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292 | mOBSP->SetWord( JFIFVersion ); //Version |
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293 | mOBSP->SetByte( mProperty.Units ); |
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294 | mOBSP->SetWord( mProperty.HDensity ); |
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295 | mOBSP->SetWord( mProperty.VDensity ); |
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296 | mOBSP->SetByte( 0 ); |
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297 | mOBSP->SetByte( 0 ); |
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298 | |
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299 | //comment |
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300 | if( mProperty.Comment != 0 ){ |
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301 | mOBSP->SetByte( M_Marker ); //FF |
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302 | mOBSP->SetByte( M_COM ); //comment |
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303 | int length = strlen( mProperty.Comment ) + 1; |
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304 | mOBSP->SetWord( length + 2 ); |
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305 | mOBSP->CopyByte( mProperty.Comment, length ); |
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306 | } |
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307 | |
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308 | //DQT |
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309 | mOBSP->SetByte( M_Marker ); |
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310 | mOBSP->SetByte( M_DQT ); |
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311 | mOBSP->SetWord( 67 ); |
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312 | mOBSP->SetByte( 0 ); |
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313 | for( i=0; i<64; i++ ) |
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314 | mOBSP->SetByte( u_char( YQuantumT[Zigzag[i]] ) ); |
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315 | mOBSP->SetByte( M_Marker ); |
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316 | mOBSP->SetByte( M_DQT ); |
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317 | mOBSP->SetWord( 67 ); |
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318 | mOBSP->SetByte( 1 ); |
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319 | for( i=0; i<64; i++ ) |
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320 | mOBSP->SetByte( u_char( CQuantumT[Zigzag[i]] ) ); |
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321 | // DHT |
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322 | mOBSP->CopyByte( (char*)YDcDht, DcDhtLength ); |
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323 | mOBSP->CopyByte( (char*)CDcDht, DcDhtLength ); |
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324 | mOBSP->CopyByte( (char*)YAcDht, AcDhtLength ); |
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325 | mOBSP->CopyByte( (char*)CAcDht, AcDhtLength ); |
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326 | |
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327 | // Frame Header |
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328 | mOBSP->SetByte( M_Marker ); // FF |
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329 | mOBSP->SetByte( M_SOF0 ); |
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330 | mOBSP->SetWord( 3 * mProperty.Dimension + 8 ); |
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331 | mOBSP->SetByte( mProperty.SamplePrecision ); |
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332 | mOBSP->SetWord( mProperty.nRow ); |
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333 | mOBSP->SetWord( mProperty.nColumn ); |
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334 | mOBSP->SetByte( mProperty.Dimension ); |
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335 | |
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336 | mOBSP->SetByte( 0 ); |
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337 | mOBSP->SetByte( YSampleF ); |
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338 | mOBSP->SetByte( 0 ); |
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339 | |
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340 | mOBSP->SetByte( 1 ); |
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341 | mOBSP->SetByte( CSampleF ); |
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342 | |
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343 | mOBSP->SetByte( 1 ); |
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344 | mOBSP->SetByte( 2 ); |
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345 | mOBSP->SetByte( CSampleF ); |
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346 | mOBSP->SetByte( 1 ); |
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347 | |
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348 | //Scan Header |
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349 | mOBSP->SetByte( M_Marker ); |
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350 | mOBSP->SetByte( M_SOS ); |
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351 | mOBSP->SetWord( 2 * mProperty.Dimension + 6 ); |
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352 | mOBSP->SetByte( mProperty.Dimension ); |
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353 | for( i=0; i<mProperty.Dimension; i++ ){ |
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354 | mOBSP->SetByte( i ); |
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355 | mOBSP->SetByte( i==0 ? 0 : 0x11 ); |
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356 | } |
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357 | mOBSP->SetByte( 0 ); //Ss |
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358 | mOBSP->SetByte( 63 ); //Se |
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359 | mOBSP->SetByte( 0 ); //Ah,Al |
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360 | } |
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361 | |
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362 | //EOI |
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363 | void |
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364 | G4JpegCoder::WriteEOI( void ) |
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365 | { |
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366 | mOBSP->SetByte( M_Marker ); |
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367 | mOBSP->SetByte( M_EOI ); |
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368 | } |
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369 | |
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370 | //SetJpegProperty |
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371 | void |
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372 | G4JpegCoder::SetJpegProperty(const G4JpegProperty& aProperty ) |
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373 | { |
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374 | mProperty = aProperty; |
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375 | mProperty.Dimension = 3; |
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376 | mProperty.SamplePrecision = 8; |
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377 | mProperty.Format = 1; |
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378 | mProperty.MajorRevisions = 1; |
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379 | mProperty.MinorRevisions = 2; |
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380 | mProperty.HThumbnail = 0; |
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381 | mProperty.VThumbnail = 0; |
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382 | } |
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