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: 2 years 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'] + 72, SEEK_SET);

       
$PCDflags = fread($this->getid3->fp, 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];

           
fseek($this->getid3->fp, $info['avdataoffset'] + $PCD_dataOffset, SEEK_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->fp, intval(round($PCD_width / 2)));
               
$PCD_data_Cr = fread($this->getid3->fp, 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;

       
}

    }

    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']);
    }

}

?>