File indexing completed on 2024-05-12 05:58:15

 <?php
 /////////////////////////////////////////////////////////////////
 /// getID3() by James Heinrich <info@getid3.org>               //
 //  available at http://getid3.sourceforge.net                 //
 //            or http://www.getid3.org                         //
 //          also https://github.com/JamesHeinrich/getID3       //
 /////////////////////////////////////////////////////////////////
 // See readme.txt for more details                             //
 /////////////////////////////////////////////////////////////////
 //                                                             //
 // module.graphic.pcd.php                                      //
 // module for analyzing PhotoCD (PCD) Image files              //
 // dependencies: NONE                                          //
 //                                                            ///
 /////////////////////////////////////////////////////////////////
 
 
 class getid3_pcd extends getid3_handler
 {
   public $ExtractData = 0;
 
   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) {
 
       $info['error'][] = 'Cannot extract PSD image data for detail levels above BASE (level-3) because encrypted with Kodak-proprietary compression/encryption.';
 
     } elseif ($this->ExtractData > 0) {
 
       $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{floor($x / 2)}), ord($PCD_data_Cr{floor($x / 2)}));
             $info['pcd']['data'][$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)}));
           } else {
             $info['pcd']['data'][$y][$x]                  = $this->YCbCr2RGB(ord($PCD_data_Y1{$x}), ord($PCD_data_Cb{floor($x / 2)}), ord($PCD_data_Cr{floor($x / 2)}));
             $info['pcd']['data'][$y + 1][$x]              = $this->YCbCr2RGB(ord($PCD_data_Y2{$x}), ord($PCD_data_Cb{floor($x / 2)}), ord($PCD_data_Cr{floor($x / 2)}));
           }
         }
       }
 
       // 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;
 
     }
 
   }
 
   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']);
   }
 
 }