1<?php 2 3///////////////////////////////////////////////////////////////// 4/// getID3() by James Heinrich <info@getid3.org> // 5// available at https://github.com/JamesHeinrich/getID3 // 6// or https://www.getid3.org // 7// or http://getid3.sourceforge.net // 8// see readme.txt for more details // 9///////////////////////////////////////////////////////////////// 10// // 11// module.graphic.pcd.php // 12// module for analyzing PhotoCD (PCD) Image files // 13// dependencies: NONE // 14// /// 15///////////////////////////////////////////////////////////////// 16 17if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers 18 exit; 19} 20class getid3_pcd extends getid3_handler 21{ 22 public $ExtractData = 0; 23 24 /** 25 * @return bool 26 */ 27 public function Analyze() { 28 $info = &$this->getid3->info; 29 30 $info['fileformat'] = 'pcd'; 31 $info['video']['dataformat'] = 'pcd'; 32 $info['video']['lossless'] = false; 33 34 35 $this->fseek($info['avdataoffset'] + 72); 36 37 $PCDflags = $this->fread(1); 38 $PCDisVertical = ((ord($PCDflags) & 0x01) ? true : false); 39 40 41 if ($PCDisVertical) { 42 $info['video']['resolution_x'] = 3072; 43 $info['video']['resolution_y'] = 2048; 44 } else { 45 $info['video']['resolution_x'] = 2048; 46 $info['video']['resolution_y'] = 3072; 47 } 48 49 50 if ($this->ExtractData > 3) { 51 52 $this->error('Cannot extract PSD image data for detail levels above BASE (level-3) because encrypted with Kodak-proprietary compression/encryption.'); 53 return false; 54 55 } elseif ($this->ExtractData > 0) { 56 57 $PCD_levels[1] = array( 192, 128, 0x02000); // BASE/16 58 $PCD_levels[2] = array( 384, 256, 0x0B800); // BASE/4 59 $PCD_levels[3] = array( 768, 512, 0x30000); // BASE 60 //$PCD_levels[4] = array(1536, 1024, ??); // BASE*4 - encrypted with Kodak-proprietary compression/encryption 61 //$PCD_levels[5] = array(3072, 2048, ??); // BASE*16 - encrypted with Kodak-proprietary compression/encryption 62 //$PCD_levels[6] = array(6144, 4096, ??); // BASE*64 - encrypted with Kodak-proprietary compression/encryption; PhotoCD-Pro only 63 64 list($PCD_width, $PCD_height, $PCD_dataOffset) = $PCD_levels[3]; 65 66 $this->fseek($info['avdataoffset'] + $PCD_dataOffset); 67 68 for ($y = 0; $y < $PCD_height; $y += 2) { 69 // The image-data of these subtypes start at the respective offsets of 02000h, 0b800h and 30000h. 70 // To decode the YcbYr to the more usual RGB-code, three lines of data have to be read, each 71 // consisting of ‘w’ bytes, where ‘w’ is the width of the image-subtype. The first ‘w’ bytes and 72 // the first half of the third ‘w’ bytes contain data for the first RGB-line, the second ‘w’ bytes 73 // and the second half of the third ‘w’ bytes contain data for a second RGB-line. 74 75 $PCD_data_Y1 = $this->fread($PCD_width); 76 $PCD_data_Y2 = $this->fread($PCD_width); 77 $PCD_data_Cb = $this->fread(intval(round($PCD_width / 2))); 78 $PCD_data_Cr = $this->fread(intval(round($PCD_width / 2))); 79 80 for ($x = 0; $x < $PCD_width; $x++) { 81 if ($PCDisVertical) { 82 $info['pcd']['data'][$PCD_width - $x][$y] = $this->YCbCr2RGB(ord($PCD_data_Y1[$x]), ord($PCD_data_Cb[(int) floor($x / 2)]), ord($PCD_data_Cr[(int) floor($x / 2)])); 83 $info['pcd']['data'][$PCD_width - $x][$y + 1] = $this->YCbCr2RGB(ord($PCD_data_Y2[$x]), ord($PCD_data_Cb[(int) floor($x / 2)]), ord($PCD_data_Cr[(int) floor($x / 2)])); 84 } else { 85 $info['pcd']['data'][$y][$x] = $this->YCbCr2RGB(ord($PCD_data_Y1[$x]), ord($PCD_data_Cb[(int) floor($x / 2)]), ord($PCD_data_Cr[(int) floor($x / 2)])); 86 $info['pcd']['data'][$y + 1][$x] = $this->YCbCr2RGB(ord($PCD_data_Y2[$x]), ord($PCD_data_Cb[(int) floor($x / 2)]), ord($PCD_data_Cr[(int) floor($x / 2)])); 87 } 88 } 89 } 90 91 // Example for plotting extracted data 92 //getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio.ac3.php', __FILE__, true); 93 //if ($PCDisVertical) { 94 // $BMPinfo['resolution_x'] = $PCD_height; 95 // $BMPinfo['resolution_y'] = $PCD_width; 96 //} else { 97 // $BMPinfo['resolution_x'] = $PCD_width; 98 // $BMPinfo['resolution_y'] = $PCD_height; 99 //} 100 //$BMPinfo['bmp']['data'] = $info['pcd']['data']; 101 //getid3_bmp::PlotBMP($BMPinfo); 102 //exit; 103 104 } 105 106 return false; 107 } 108 109 /** 110 * @param int $Y 111 * @param int $Cb 112 * @param int $Cr 113 * 114 * @return int 115 */ 116 public function YCbCr2RGB($Y, $Cb, $Cr) { 117 static $YCbCr_constants = array(); 118 if (empty($YCbCr_constants)) { 119 $YCbCr_constants['red']['Y'] = 0.0054980 * 256; 120 $YCbCr_constants['red']['Cb'] = 0.0000000 * 256; 121 $YCbCr_constants['red']['Cr'] = 0.0051681 * 256; 122 $YCbCr_constants['green']['Y'] = 0.0054980 * 256; 123 $YCbCr_constants['green']['Cb'] = -0.0015446 * 256; 124 $YCbCr_constants['green']['Cr'] = -0.0026325 * 256; 125 $YCbCr_constants['blue']['Y'] = 0.0054980 * 256; 126 $YCbCr_constants['blue']['Cb'] = 0.0079533 * 256; 127 $YCbCr_constants['blue']['Cr'] = 0.0000000 * 256; 128 } 129 130 $RGBcolor = array('red'=>0, 'green'=>0, 'blue'=>0); 131 foreach ($RGBcolor as $rgbname => $dummy) { 132 $RGBcolor[$rgbname] = max(0, 133 min(255, 134 intval( 135 round( 136 ($YCbCr_constants[$rgbname]['Y'] * $Y) + 137 ($YCbCr_constants[$rgbname]['Cb'] * ($Cb - 156)) + 138 ($YCbCr_constants[$rgbname]['Cr'] * ($Cr - 137)) 139 ) 140 ) 141 ) 142 ); 143 } 144 return (($RGBcolor['red'] * 65536) + ($RGBcolor['green'] * 256) + $RGBcolor['blue']); 145 } 146 147} 148