name : module.graphic.pcd.php <?php ///////////////////////////////////////////////////////////////// /// getID3() by James Heinrich <info@getid3.org> // // available at https://github.com/JamesHeinrich/getID3 // // or https://www.getid3.org // // or http://getid3.sourceforge.net // // see readme.txt for more details // ///////////////////////////////////////////////////////////////// // // // module.graphic.pcd.php // // module for analyzing PhotoCD (PCD) Image files // // dependencies: NONE // // /// ///////////////////////////////////////////////////////////////// if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers exit; } class getid3_pcd extends getid3_handler { public $ExtractData = 0; /** * @return bool */ public function Analyze() { $info = &$this->getid3->info; $info['fileformat'] = 'pcd'; $info['video']['dataformat'] = 'pcd'; $info['video']['lossless'] = false; $this->fseek($info['avdataoffset'] + 72); $PCDflags = $this->fread(1); $PCDisVertical = ((ord($PCDflags) & 0x01) ? true : false); if ($PCDisVertical) { $info['video']['resolution_x'] = 3072; $info['video']['resolution_y'] = 2048; } else { $info['video']['resolution_x'] = 2048; $info['video']['resolution_y'] = 3072; } if ($this->ExtractData > 3) { $this->error('Cannot extract PSD image data for detail levels above BASE (level-3) because encrypted with Kodak-proprietary compression/encryption.'); return false; } elseif ($this->ExtractData > 0) { $PCD_levels = array(); $PCD_levels[1] = array( 192, 128, 0x02000); // BASE/16 $PCD_levels[2] = array( 384, 256, 0x0B800); // BASE/4 $PCD_levels[3] = array( 768, 512, 0x30000); // BASE //$PCD_levels[4] = array(1536, 1024, ??); // BASE*4 - encrypted with Kodak-proprietary compression/encryption //$PCD_levels[5] = array(3072, 2048, ??); // BASE*16 - encrypted with Kodak-proprietary compression/encryption //$PCD_levels[6] = array(6144, 4096, ??); // BASE*64 - encrypted with Kodak-proprietary compression/encryption; PhotoCD-Pro only list($PCD_width, $PCD_height, $PCD_dataOffset) = $PCD_levels[3]; $this->fseek($info['avdataoffset'] + $PCD_dataOffset); for ($y = 0; $y < $PCD_height; $y += 2) { // The image-data of these subtypes start at the respective offsets of 02000h, 0b800h and 30000h. // To decode the YcbYr to the more usual RGB-code, three lines of data have to be read, each // consisting of ‘w’ bytes, where ‘w’ is the width of the image-subtype. The first ‘w’ bytes and // the first half of the third ‘w’ bytes contain data for the first RGB-line, the second ‘w’ bytes // and the second half of the third ‘w’ bytes contain data for a second RGB-line. $PCD_data_Y1 = $this->fread($PCD_width); $PCD_data_Y2 = $this->fread($PCD_width); $PCD_data_Cb = $this->fread(intval(round($PCD_width / 2))); $PCD_data_Cr = $this->fread(intval(round($PCD_width / 2))); for ($x = 0; $x < $PCD_width; $x++) { if ($PCDisVertical) { $info['pcd']['data'][$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)])); $info['pcd']['data'][$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)])); } else { $info['pcd']['data'][$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)])); $info['pcd']['data'][$y + 1][$x] = $this->YCbCr2RGB(ord($PCD_data_Y2[$x]), ord($PCD_data_Cb[(int) floor($x / 2)]), ord($PCD_data_Cr[(int) floor($x / 2)])); } } } // Example for plotting extracted data //getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio.ac3.php', __FILE__, true); //if ($PCDisVertical) { // $BMPinfo['resolution_x'] = $PCD_height; // $BMPinfo['resolution_y'] = $PCD_width; //} else { // $BMPinfo['resolution_x'] = $PCD_width; // $BMPinfo['resolution_y'] = $PCD_height; //} //$BMPinfo['bmp']['data'] = $info['pcd']['data']; //getid3_bmp::PlotBMP($BMPinfo); //exit; } return false; } /** * @param int $Y * @param int $Cb * @param int $Cr * * @return int */ public function YCbCr2RGB($Y, $Cb, $Cr) { static $YCbCr_constants = array(); if (empty($YCbCr_constants)) { $YCbCr_constants['red']['Y'] = 0.0054980 * 256; $YCbCr_constants['red']['Cb'] = 0.0000000 * 256; $YCbCr_constants['red']['Cr'] = 0.0051681 * 256; $YCbCr_constants['green']['Y'] = 0.0054980 * 256; $YCbCr_constants['green']['Cb'] = -0.0015446 * 256; $YCbCr_constants['green']['Cr'] = -0.0026325 * 256; $YCbCr_constants['blue']['Y'] = 0.0054980 * 256; $YCbCr_constants['blue']['Cb'] = 0.0079533 * 256; $YCbCr_constants['blue']['Cr'] = 0.0000000 * 256; } $RGBcolor = array('red'=>0, 'green'=>0, 'blue'=>0); foreach ($RGBcolor as $rgbname => $dummy) { $RGBcolor[$rgbname] = max(0, min(255, intval( round( ($YCbCr_constants[$rgbname]['Y'] * $Y) + ($YCbCr_constants[$rgbname]['Cb'] * ($Cb - 156)) + ($YCbCr_constants[$rgbname]['Cr'] * ($Cr - 137)) ) ) ) ); } return (($RGBcolor['red'] * 65536) + ($RGBcolor['green'] * 256) + $RGBcolor['blue']); } }