ILIAS  release_5-4 Revision v5.4.26-12-gabc799a52e6
Public Member Functions | Data Fields
getid3_pcd Class Reference

getID3() by James Heinrich info@.nosp@m.geti.nosp@m.d3.or.nosp@m.g // More...

+ Inheritance diagram for getid3_pcd:
+ Collaboration diagram for getid3_pcd:

Public Member Functions

 Analyze ()
 
 YCbCr2RGB ($Y, $Cb, $Cr)
 
- Public Member Functions inherited from getid3_handler
 __construct (getID3 $getid3, $call_module=null)
 
 Analyze ()
 
 AnalyzeString ($string)
 
 setStringMode ($string)
 
 saveAttachment ($name, $offset, $length, $image_mime=null)
 

Data Fields

 $ExtractData = 0
 

Additional Inherited Members

- Protected Member Functions inherited from getid3_handler
 ftell ()
 
 fread ($bytes)
 
 fseek ($bytes, $whence=SEEK_SET)
 
 feof ()
 
 isDependencyFor ($module)
 
 error ($text)
 
 warning ($text)
 
 notice ($text)
 
- Protected Attributes inherited from getid3_handler
 $getid3
 
 $data_string_flag = false
 
 $data_string = ''
 
 $data_string_position = 0
 
 $data_string_length = 0
 

Detailed Description

getID3() by James Heinrich info@.nosp@m.geti.nosp@m.d3.or.nosp@m.g //

Definition at line 18 of file module.graphic.pcd.php.

Member Function Documentation

◆ Analyze()

getid3_pcd::Analyze ( )

Reimplemented from getid3_handler.

Definition at line 22 of file module.graphic.pcd.php.

22 {
23 $info = &$this->getid3->info;
24
25 $info['fileformat'] = 'pcd';
26 $info['video']['dataformat'] = 'pcd';
27 $info['video']['lossless'] = false;
28
29
30 $this->fseek($info['avdataoffset'] + 72);
31
32 $PCDflags = $this->fread(1);
33 $PCDisVertical = ((ord($PCDflags) & 0x01) ? true : false);
34
35
36 if ($PCDisVertical) {
37 $info['video']['resolution_x'] = 3072;
38 $info['video']['resolution_y'] = 2048;
39 } else {
40 $info['video']['resolution_x'] = 2048;
41 $info['video']['resolution_y'] = 3072;
42 }
43
44
45 if ($this->ExtractData > 3) {
46
47 $this->error('Cannot extract PSD image data for detail levels above BASE (level-3) because encrypted with Kodak-proprietary compression/encryption.');
48
49 } elseif ($this->ExtractData > 0) {
50
51 $PCD_levels[1] = array( 192, 128, 0x02000); // BASE/16
52 $PCD_levels[2] = array( 384, 256, 0x0B800); // BASE/4
53 $PCD_levels[3] = array( 768, 512, 0x30000); // BASE
54 //$PCD_levels[4] = array(1536, 1024, ??); // BASE*4 - encrypted with Kodak-proprietary compression/encryption
55 //$PCD_levels[5] = array(3072, 2048, ??); // BASE*16 - encrypted with Kodak-proprietary compression/encryption
56 //$PCD_levels[6] = array(6144, 4096, ??); // BASE*64 - encrypted with Kodak-proprietary compression/encryption; PhotoCD-Pro only
57
58 list($PCD_width, $PCD_height, $PCD_dataOffset) = $PCD_levels[3];
59
60 $this->fseek($info['avdataoffset'] + $PCD_dataOffset);
61
62 for ($y = 0; $y < $PCD_height; $y += 2) {
63 // The image-data of these subtypes start at the respective offsets of 02000h, 0b800h and 30000h.
64 // To decode the YcbYr to the more usual RGB-code, three lines of data have to be read, each
65 // consisting of ‘w’ bytes, where ‘w’ is the width of the image-subtype. The first ‘w’ bytes and
66 // the first half of the third ‘w’ bytes contain data for the first RGB-line, the second ‘w’ bytes
67 // and the second half of the third ‘w’ bytes contain data for a second RGB-line.
68
69 $PCD_data_Y1 = $this->fread($PCD_width);
70 $PCD_data_Y2 = $this->fread($PCD_width);
71 $PCD_data_Cb = $this->fread(intval(round($PCD_width / 2)));
72 $PCD_data_Cr = $this->fread(intval(round($PCD_width / 2)));
73
74 for ($x = 0; $x < $PCD_width; $x++) {
75 if ($PCDisVertical) {
76 $info['pcd']['data'][$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)}));
77 $info['pcd']['data'][$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)}));
78 } else {
79 $info['pcd']['data'][$y][$x] = $this->YCbCr2RGB(ord($PCD_data_Y1{$x}), ord($PCD_data_Cb{floor($x / 2)}), ord($PCD_data_Cr{floor($x / 2)}));
80 $info['pcd']['data'][$y + 1][$x] = $this->YCbCr2RGB(ord($PCD_data_Y2{$x}), ord($PCD_data_Cb{floor($x / 2)}), ord($PCD_data_Cr{floor($x / 2)}));
81 }
82 }
83 }
84
85 // Example for plotting extracted data
86 //getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio.ac3.php', __FILE__, true);
87 //if ($PCDisVertical) {
88 // $BMPinfo['resolution_x'] = $PCD_height;
89 // $BMPinfo['resolution_y'] = $PCD_width;
90 //} else {
91 // $BMPinfo['resolution_x'] = $PCD_width;
92 // $BMPinfo['resolution_y'] = $PCD_height;
93 //}
94 //$BMPinfo['bmp']['data'] = $info['pcd']['data'];
95 //getid3_bmp::PlotBMP($BMPinfo);
96 //exit;
97
98 }
99
100 }
getid3_handler\fseek
fseek($bytes, $whence=SEEK_SET)
Definition: getid3.php:1711
getid3_handler\fread
fread($bytes)
Definition: getid3.php:1683
getid3_handler\error
error($text)
Definition: getid3.php:1752
getid3_pcd\YCbCr2RGB
YCbCr2RGB($Y, $Cb, $Cr)
Definition: module.graphic.pcd.php:102
$x
$x
Definition: complexTest.php:9
$y
$y
Definition: example_007.php:83
$info
$info
Definition: index.php:5

References $info, $x, $y, getid3_handler\error(), getid3_handler\fread(), getid3_handler\fseek(), and YCbCr2RGB().

+ Here is the call graph for this function:

◆ YCbCr2RGB()

getid3_pcd::YCbCr2RGB (   $Y,
  $Cb,
  $Cr 
)

Definition at line 102 of file module.graphic.pcd.php.

102 {
103 static $YCbCr_constants = array();
104 if (empty($YCbCr_constants)) {
105 $YCbCr_constants['red']['Y'] = 0.0054980 * 256;
106 $YCbCr_constants['red']['Cb'] = 0.0000000 * 256;
107 $YCbCr_constants['red']['Cr'] = 0.0051681 * 256;
108 $YCbCr_constants['green']['Y'] = 0.0054980 * 256;
109 $YCbCr_constants['green']['Cb'] = -0.0015446 * 256;
110 $YCbCr_constants['green']['Cr'] = -0.0026325 * 256;
111 $YCbCr_constants['blue']['Y'] = 0.0054980 * 256;
112 $YCbCr_constants['blue']['Cb'] = 0.0079533 * 256;
113 $YCbCr_constants['blue']['Cr'] = 0.0000000 * 256;
114 }
115
116 $RGBcolor = array('red'=>0, 'green'=>0, 'blue'=>0);
117 foreach ($RGBcolor as $rgbname => $dummy) {
118 $RGBcolor[$rgbname] = max(0,
119 min(255,
120 intval(
121 round(
122 ($YCbCr_constants[$rgbname]['Y'] * $Y) +
123 ($YCbCr_constants[$rgbname]['Cb'] * ($Cb - 156)) +
124 ($YCbCr_constants[$rgbname]['Cr'] * ($Cr - 137))
125 )
126 )
127 )
128 );
129 }
130 return (($RGBcolor['red'] * 65536) + ($RGBcolor['green'] * 256) + $RGBcolor['blue']);
131 }

Referenced by Analyze().

+ Here is the caller graph for this function:

Field Documentation

◆ $ExtractData

getid3_pcd::$ExtractData = 0

Definition at line 20 of file module.graphic.pcd.php.

The documentation for this class was generated from the following file: