Login   Register  
PHP Classes
elePHPant
Icontem

File: includes/getid3/module.graphic.pcd.php

Recommend this page to a friend!
Stumble It! Stumble It! Bookmark in del.icio.us Bookmark in del.icio.us
  Classes of Karl Holz  >  WaldScan  >  includes/getid3/module.graphic.pcd.php  >  Download  
File: includes/getid3/module.graphic.pcd.php
Role: Auxiliary script
Content type: text/plain
Description: getID3 dependency
Class: WaldScan
Scan directories for files with certain extensions
Author: By
Last change:
Date: 1 year ago
Size: 5,576 bytes
 

Contents

Class file image Download
<?php
/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org>               //
//  available at http://getid3.sourceforge.net                 //
//            or http://www.getid3.org                         //
/////////////////////////////////////////////////////////////////
// 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
{
    var 
$ExtractData 0;

    function 
Analyze() {
        
$info = &$this->getid3->info;

        
$info['fileformat']          = 'pcd';
        
$info['video']['dataformat'] = 'pcd';
        
$info['video']['lossless']   = false;


        
fseek($this->getid3->fp$info['avdataoffset'] + 72SEEK_SET);

        
$PCDflags fread($this->getid3->fp1);
        
$PCDisVertical = ((ord($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,  1280x02000); // BASE/16
            
$PCD_levels[2] = array( 384,  2560x0B800); // BASE/4
            
$PCD_levels[3] = array( 768,  5120x30000); // BASE
            //$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];

            
fseek($this->getid3->fp$info['avdataoffset'] + $PCD_dataOffsetSEEK_SET);

            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.

                
$PCD_data_Y1 fread($this->getid3->fp$PCD_width);
                
$PCD_data_Y2 fread($this->getid3->fp$PCD_width);
                
$PCD_data_Cb fread($this->getid3->fpintval(round($PCD_width 2)));
                
$PCD_data_Cr fread($this->getid3->fpintval(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;

        
}

    }

    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']);
    }

}

?>