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 /////////////////////////////////////////////////////////////////
11 // module.graphic.pcd.php //
12 // module for analyzing PhotoCD (PCD) Image files //
13 // dependencies: NONE //
15 /////////////////////////////////////////////////////////////////
17 if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers
20 class getid3_pcd
extends getid3_handler
22 public $ExtractData = 0;
27 public function Analyze() {
28 $info = &$this->getid3
->info
;
30 $info['fileformat'] = 'pcd';
31 $info['video']['dataformat'] = 'pcd';
32 $info['video']['lossless'] = false;
35 $this->fseek($info['avdataoffset'] +
72);
37 $PCDflags = $this->fread(1);
38 $PCDisVertical = ((ord($PCDflags) & 0x01) ?
true : false);
42 $info['video']['resolution_x'] = 3072;
43 $info['video']['resolution_y'] = 2048;
45 $info['video']['resolution_x'] = 2048;
46 $info['video']['resolution_y'] = 3072;
50 if ($this->ExtractData
> 3) {
52 $this->error('Cannot extract PSD image data for detail levels above BASE (level-3) because encrypted with Kodak-proprietary compression/encryption.');
55 } elseif ($this->ExtractData
> 0) {
57 $PCD_levels[1] = array( 192, 128, 0x02000); // BASE/16
58 $PCD_levels[2] = array( 384, 256, 0x0B800); // BASE/4
59 $PCD_levels[3] = array( 768, 512, 0x30000); // BASE
60 //$PCD_levels[4] = array(1536, 1024, ??); // BASE*4 - encrypted with Kodak-proprietary compression/encryption
61 //$PCD_levels[5] = array(3072, 2048, ??); // BASE*16 - encrypted with Kodak-proprietary compression/encryption
62 //$PCD_levels[6] = array(6144, 4096, ??); // BASE*64 - encrypted with Kodak-proprietary compression/encryption; PhotoCD-Pro only
64 list($PCD_width, $PCD_height, $PCD_dataOffset) = $PCD_levels[3];
66 $this->fseek($info['avdataoffset'] +
$PCD_dataOffset);
68 for ($y = 0; $y < $PCD_height; $y +
= 2) {
69 // The image-data of these subtypes start at the respective offsets of 02000h, 0b800h and 30000h.
70 // To decode the YcbYr to the more usual RGB-code, three lines of data have to be read, each
71 // consisting of \91w\92 bytes, where \91w\92 is the width of the image-subtype. The first \91w\92 bytes and
72 // the first half of the third \91w\92 bytes contain data for the first RGB-line, the second \91w\92 bytes
73 // and the second half of the third \91w\92 bytes contain data for a second RGB-line.
75 $PCD_data_Y1 = $this->fread($PCD_width);
76 $PCD_data_Y2 = $this->fread($PCD_width);
77 $PCD_data_Cb = $this->fread(intval(round($PCD_width / 2)));
78 $PCD_data_Cr = $this->fread(intval(round($PCD_width / 2)));
80 for ($x = 0; $x < $PCD_width; $x++
) {
82 $info['pcd']['data'][$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)]));
83 $info['pcd']['data'][$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)]));
85 $info['pcd']['data'][$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)]));
86 $info['pcd']['data'][$y +
1][$x] = $this->YCbCr2RGB(ord($PCD_data_Y2[$x]), ord($PCD_data_Cb[(int) floor($x / 2)]), ord($PCD_data_Cr[(int) floor($x / 2)]));
91 // Example for plotting extracted data
92 //getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio.ac3.php', __FILE__, true);
93 //if ($PCDisVertical) {
94 // $BMPinfo['resolution_x'] = $PCD_height;
95 // $BMPinfo['resolution_y'] = $PCD_width;
97 // $BMPinfo['resolution_x'] = $PCD_width;
98 // $BMPinfo['resolution_y'] = $PCD_height;
100 //$BMPinfo['bmp']['data'] = $info['pcd']['data'];
101 //getid3_bmp::PlotBMP($BMPinfo);
116 public function YCbCr2RGB($Y, $Cb, $Cr) {
117 static $YCbCr_constants = array();
118 if (empty($YCbCr_constants)) {
119 $YCbCr_constants['red']['Y'] = 0.0054980 * 256;
120 $YCbCr_constants['red']['Cb'] = 0.0000000 * 256;
121 $YCbCr_constants['red']['Cr'] = 0.0051681 * 256;
122 $YCbCr_constants['green']['Y'] = 0.0054980 * 256;
123 $YCbCr_constants['green']['Cb'] = -0.0015446 * 256;
124 $YCbCr_constants['green']['Cr'] = -0.0026325 * 256;
125 $YCbCr_constants['blue']['Y'] = 0.0054980 * 256;
126 $YCbCr_constants['blue']['Cb'] = 0.0079533 * 256;
127 $YCbCr_constants['blue']['Cr'] = 0.0000000 * 256;
130 $RGBcolor = array('red'=>0, 'green'=>0, 'blue'=>0);
131 foreach ($RGBcolor as $rgbname => $dummy) {
132 $RGBcolor[$rgbname] = max(0,
136 ($YCbCr_constants[$rgbname]['Y'] * $Y) +
137 ($YCbCr_constants[$rgbname]['Cb'] * ($Cb - 156)) +
138 ($YCbCr_constants[$rgbname]['Cr'] * ($Cr - 137))
144 return (($RGBcolor['red'] * 65536) +
($RGBcolor['green'] * 256) +
$RGBcolor['blue']);