www/plugins-dist/medias/lib/getid3/module.graphic.pcd.php

   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
  17
  18 class getid3_pcd extends getid3_handler
  19 {
  20         public $ExtractData = 0;
  21
  22         /**
  23          * @return bool
  24          */
  25         public function Analyze() {
  26                 $info = &$this->getid3->info;
  27
  28                 $info['fileformat']          = 'pcd';
  29                 $info['video']['dataformat'] = 'pcd';
  30                 $info['video']['lossless']   = false;
  31
  32
  33                 $this->fseek($info['avdataoffset'] + 72);
  34
  35                 $PCDflags = $this->fread(1);
  36                 $PCDisVertical = ((ord($PCDflags) & 0x01) ? true : false);
  37
  38
  39                 if ($PCDisVertical) {
  40                         $info['video']['resolution_x'] = 3072;
  41                         $info['video']['resolution_y'] = 2048;
  42                 } else {
  43                         $info['video']['resolution_x'] = 2048;
  44                         $info['video']['resolution_y'] = 3072;
  45                 }
  46
  47
  48                 if ($this->ExtractData > 3) {
  49
  50                         $this->error('Cannot extract PSD image data for detail levels above BASE (level-3) because encrypted with Kodak-proprietary compression/encryption.');
  51
  52                 } elseif ($this->ExtractData > 0) {
  53
  54                         $PCD_levels[1] = array( 192,  128, 0x02000); // BASE/16
  55                         $PCD_levels[2] = array( 384,  256, 0x0B800); // BASE/4
  56                         $PCD_levels[3] = array( 768,  512, 0x30000); // BASE
  57                         //$PCD_levels[4] = array(1536, 1024,    ??); // BASE*4  - encrypted with Kodak-proprietary compression/encryption
  58                         //$PCD_levels[5] = array(3072, 2048,    ??); // BASE*16 - encrypted with Kodak-proprietary compression/encryption
  59                         //$PCD_levels[6] = array(6144, 4096,    ??); // BASE*64 - encrypted with Kodak-proprietary compression/encryption; PhotoCD-Pro only
  60
  61                         list($PCD_width, $PCD_height, $PCD_dataOffset) = $PCD_levels[3];
  62
  63                         $this->fseek($info['avdataoffset'] + $PCD_dataOffset);
  64
  65                         for ($y = 0; $y < $PCD_height; $y += 2) {
  66                                 // The image-data of these subtypes start at the respective offsets of 02000h, 0b800h and 30000h.
  67                                 // To decode the YcbYr to the more usual RGB-code, three lines of data have to be read, each
  68                                 // consisting of \91w\92 bytes, where \91w\92 is the width of the image-subtype. The first \91w\92 bytes and
  69                                 // the first half of the third \91w\92 bytes contain data for the first RGB-line, the second \91w\92 bytes
  70                                 // and the second half of the third \91w\92 bytes contain data for a second RGB-line.
  71
  72                                 $PCD_data_Y1 = $this->fread($PCD_width);
  73                                 $PCD_data_Y2 = $this->fread($PCD_width);
  74                                 $PCD_data_Cb = $this->fread(intval(round($PCD_width / 2)));
  75                                 $PCD_data_Cr = $this->fread(intval(round($PCD_width / 2)));
  76
  77                                 for ($x = 0; $x < $PCD_width; $x++) {
  78                                         if ($PCDisVertical) {
  79                                                 $info['pcd']['data'][$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)}));
  80                                                 $info['pcd']['data'][$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)}));
  81                                         } else {
  82                                                 $info['pcd']['data'][$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)}));
  83                                                 $info['pcd']['data'][$y + 1][$x]              = $this->YCbCr2RGB(ord($PCD_data_Y2{$x}), ord($PCD_data_Cb{(int) floor($x / 2)}), ord($PCD_data_Cr{(int) floor($x / 2)}));
  84                                         }
  85                                 }
  86                         }
  87
  88                         // Example for plotting extracted data
  89                         //getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio.ac3.php', __FILE__, true);
  90                         //if ($PCDisVertical) {
  91                         //      $BMPinfo['resolution_x'] = $PCD_height;
  92                         //      $BMPinfo['resolution_y'] = $PCD_width;
  93                         //} else {
  94                         //      $BMPinfo['resolution_x'] = $PCD_width;
  95                         //      $BMPinfo['resolution_y'] = $PCD_height;
  96                         //}
  97                         //$BMPinfo['bmp']['data'] = $info['pcd']['data'];
  98                         //getid3_bmp::PlotBMP($BMPinfo);
  99                         //exit;
 100
 101                 }
 102
 103         }
 104
 105         /**
 106          * @param int $Y
 107          * @param int $Cb
 108          * @param int $Cr
 109          *
 110          * @return int
 111          */
 112         public function YCbCr2RGB($Y, $Cb, $Cr) {
 113                 static $YCbCr_constants = array();
 114                 if (empty($YCbCr_constants)) {
 115                         $YCbCr_constants['red']['Y']    =  0.0054980 * 256;
 116                         $YCbCr_constants['red']['Cb']   =  0.0000000 * 256;
 117                         $YCbCr_constants['red']['Cr']   =  0.0051681 * 256;
 118                         $YCbCr_constants['green']['Y']  =  0.0054980 * 256;
 119                         $YCbCr_constants['green']['Cb'] = -0.0015446 * 256;
 120                         $YCbCr_constants['green']['Cr'] = -0.0026325 * 256;
 121                         $YCbCr_constants['blue']['Y']   =  0.0054980 * 256;
 122                         $YCbCr_constants['blue']['Cb']  =  0.0079533 * 256;
 123                         $YCbCr_constants['blue']['Cr']  =  0.0000000 * 256;
 124                 }
 125
 126                 $RGBcolor = array('red'=>0, 'green'=>0, 'blue'=>0);
 127                 foreach ($RGBcolor as $rgbname => $dummy) {
 128                         $RGBcolor[$rgbname] = max(0,
 129                                                                                 min(255,
 130                                                                                         intval(
 131                                                                                                 round(
 132                                                                                                         ($YCbCr_constants[$rgbname]['Y'] * $Y) +
 133                                                                                                         ($YCbCr_constants[$rgbname]['Cb'] * ($Cb - 156)) +
 134                                                                                                         ($YCbCr_constants[$rgbname]['Cr'] * ($Cr - 137))
 135                                                                                                 )
 136                                                                                         )
 137                                                                                 )
 138                                                                         );
 139                 }
 140                 return (($RGBcolor['red'] * 65536) + ($RGBcolor['green'] * 256) + $RGBcolor['blue']);
 141         }
 142
 143 }