1 | <?php |
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2 | ///////////////////////////////////////////////////////////////// |
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3 | /// getID3() by James Heinrich <info@getid3.org> // |
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4 | // available at http://getid3.sourceforge.net // |
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5 | // or http://www.getid3.org // |
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6 | ///////////////////////////////////////////////////////////////// |
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7 | // See readme.txt for more details // |
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8 | ///////////////////////////////////////////////////////////////// |
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9 | // // |
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10 | // module.graphic.pcd.php // |
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11 | // module for analyzing PhotoCD (PCD) Image files // |
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12 | // dependencies: NONE // |
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13 | // /// |
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14 | ///////////////////////////////////////////////////////////////// |
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15 | |
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16 | |
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17 | class getid3_pcd |
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18 | { |
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19 | function getid3_pcd(&$fd, &$ThisFileInfo, $ExtractData=0) { |
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20 | $ThisFileInfo['fileformat'] = 'pcd'; |
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21 | $ThisFileInfo['video']['dataformat'] = 'pcd'; |
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22 | $ThisFileInfo['video']['lossless'] = false; |
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23 | |
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24 | |
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25 | fseek($fd, $ThisFileInfo['avdataoffset'] + 72, SEEK_SET); |
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26 | |
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27 | $PCDflags = fread($fd, 1); |
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28 | $PCDisVertical = ((ord($PCDflags) & 0x01) ? true : false); |
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29 | |
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30 | |
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31 | if ($PCDisVertical) { |
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32 | $ThisFileInfo['video']['resolution_x'] = 3072; |
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33 | $ThisFileInfo['video']['resolution_y'] = 2048; |
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34 | } else { |
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35 | $ThisFileInfo['video']['resolution_x'] = 2048; |
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36 | $ThisFileInfo['video']['resolution_y'] = 3072; |
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37 | } |
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38 | |
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39 | |
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40 | if ($ExtractData > 3) { |
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41 | |
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42 | $ThisFileInfo['error'][] = 'Cannot extract PSD image data for detail levels above BASE (3)'; |
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43 | |
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44 | } elseif ($ExtractData > 0) { |
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45 | |
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46 | $PCD_levels[1] = array( 192, 128, 0x02000); // BASE/16 |
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47 | $PCD_levels[2] = array( 384, 256, 0x0B800); // BASE/4 |
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48 | $PCD_levels[3] = array( 768, 512, 0x30000); // BASE |
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49 | //$PCD_levels[4] = array(1536, 1024, ??); // BASE*4 - encrypted with Kodak-proprietary compression/encryption |
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50 | //$PCD_levels[5] = array(3072, 2048, ??); // BASE*16 - encrypted with Kodak-proprietary compression/encryption |
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51 | //$PCD_levels[6] = array(6144, 4096, ??); // BASE*64 - encrypted with Kodak-proprietary compression/encryption; PhotoCD-Pro only |
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52 | |
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53 | list($PCD_width, $PCD_height, $PCD_dataOffset) = $PCD_levels[3]; |
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54 | |
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55 | fseek($fd, $ThisFileInfo['avdataoffset'] + $PCD_dataOffset, SEEK_SET); |
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56 | |
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57 | for ($y = 0; $y < $PCD_height; $y += 2) { |
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58 | // The image-data of these subtypes start at the respective offsets of 02000h, 0b800h and 30000h. |
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59 | // To decode the YcbYr to the more usual RGB-code, three lines of data have to be read, each |
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60 | // consisting of w bytes, where w is the width of the image-subtype. The first w bytes and |
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61 | // the first half of the third w bytes contain data for the first RGB-line, the second w bytes |
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62 | // and the second half of the third w bytes contain data for a second RGB-line. |
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63 | |
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64 | $PCD_data_Y1 = fread($fd, $PCD_width); |
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65 | $PCD_data_Y2 = fread($fd, $PCD_width); |
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66 | $PCD_data_Cb = fread($fd, intval(round($PCD_width / 2))); |
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67 | $PCD_data_Cr = fread($fd, intval(round($PCD_width / 2))); |
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68 | |
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69 | for ($x = 0; $x < $PCD_width; $x++) { |
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70 | if ($PCDisVertical) { |
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71 | $ThisFileInfo['pcd']['data'][$PCD_width - $x][$y] = $this->YCbCr2RGB(ord($PCD_data_Y1{$x}), ord($PCD_data_Cb{floor($x / 2)}), ord($PCD_data_Cr{floor($x / 2)})); |
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72 | $ThisFileInfo['pcd']['data'][$PCD_width - $x][$y + 1] = $this->YCbCr2RGB(ord($PCD_data_Y2{$x}), ord($PCD_data_Cb{floor($x / 2)}), ord($PCD_data_Cr{floor($x / 2)})); |
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73 | } else { |
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74 | $ThisFileInfo['pcd']['data'][$y][$x] = $this->YCbCr2RGB(ord($PCD_data_Y1{$x}), ord($PCD_data_Cb{floor($x / 2)}), ord($PCD_data_Cr{floor($x / 2)})); |
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75 | $ThisFileInfo['pcd']['data'][$y + 1][$x] = $this->YCbCr2RGB(ord($PCD_data_Y2{$x}), ord($PCD_data_Cb{floor($x / 2)}), ord($PCD_data_Cr{floor($x / 2)})); |
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76 | } |
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77 | } |
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78 | } |
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79 | |
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80 | // Example for plotting extracted data |
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81 | //getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio.ac3.php', __FILE__, true); |
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82 | //if ($PCDisVertical) { |
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83 | // $BMPinfo['resolution_x'] = $PCD_height; |
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84 | // $BMPinfo['resolution_y'] = $PCD_width; |
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85 | //} else { |
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86 | // $BMPinfo['resolution_x'] = $PCD_width; |
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87 | // $BMPinfo['resolution_y'] = $PCD_height; |
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88 | //} |
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89 | //$BMPinfo['bmp']['data'] = $ThisFileInfo['pcd']['data']; |
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90 | //getid3_bmp::PlotBMP($BMPinfo); |
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91 | //exit; |
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92 | |
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93 | } |
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94 | |
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95 | } |
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96 | |
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97 | function YCbCr2RGB($Y, $Cb, $Cr) { |
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98 | static $YCbCr_constants = array(); |
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99 | if (empty($YCbCr_constants)) { |
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100 | $YCbCr_constants['red']['Y'] = 0.0054980 * 256; |
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101 | $YCbCr_constants['red']['Cb'] = 0.0000000 * 256; |
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102 | $YCbCr_constants['red']['Cr'] = 0.0051681 * 256; |
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103 | $YCbCr_constants['green']['Y'] = 0.0054980 * 256; |
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104 | $YCbCr_constants['green']['Cb'] = -0.0015446 * 256; |
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105 | $YCbCr_constants['green']['Cr'] = -0.0026325 * 256; |
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106 | $YCbCr_constants['blue']['Y'] = 0.0054980 * 256; |
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107 | $YCbCr_constants['blue']['Cb'] = 0.0079533 * 256; |
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108 | $YCbCr_constants['blue']['Cr'] = 0.0000000 * 256; |
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109 | } |
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110 | |
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111 | $RGBcolor = array('red'=>0, 'green'=>0, 'blue'=>0); |
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112 | foreach ($RGBcolor as $rgbname => $dummy) { |
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113 | $RGBcolor[$rgbname] = max(0, |
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114 | min(255, |
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115 | intval( |
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116 | round( |
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117 | ($YCbCr_constants[$rgbname]['Y'] * $Y) + |
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118 | ($YCbCr_constants[$rgbname]['Cb'] * ($Cb - 156)) + |
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119 | ($YCbCr_constants[$rgbname]['Cr'] * ($Cr - 137)) |
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120 | ) |
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121 | ) |
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122 | ) |
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123 | ); |
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124 | } |
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125 | return (($RGBcolor['red'] * 65536) + ($RGBcolor['green'] * 256) + $RGBcolor['blue']); |
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126 | } |
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127 | |
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128 | } |
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129 | |
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130 | ?> |
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