getid3 /getid3/module.graphic.pcd.php

Language PHP Lines 134
MD5 Hash 934abddcd9303de2d6ce01a3b8f83c2f Estimated Cost $1,730 (why?)
Repository https://bitbucket.org/holyfield/getid3.git View Raw File View Project SPDX
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
<?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']);
	}

}
Back to Top