ILIAS  release_5-2 Revision v5.2.25-18-g3f80b828510
Public Member Functions | Data Fields
GetId3\Module\Graphic\Pcd Class Reference

GetId3() by James Heinrich info@.nosp@m.geti.nosp@m.d3.or.nosp@m.g //. More...

+ Inheritance diagram for GetId3\Module\Graphic\Pcd:
+ Collaboration diagram for GetId3\Module\Graphic\Pcd:

Public Member Functions

 analyze ()
 
 YCbCr2RGB ($Y, $Cb, $Cr)
 array $YCbCr_constants More...
 
- Public Member Functions inherited from GetId3\Handler\BaseHandler
 __construct (GetId3Core $getid3, $call_module=null)
 
 analyze ()
 Analyze from file pointer. More...
 
 AnalyzeString (&$string)
 Analyze from string instead. More...
 
 saveAttachment (&$ThisFileInfoIndex, $filename, $offset, $length)
 

Data Fields

 $ExtractData = 0
 

Additional Inherited Members

- Protected Member Functions inherited from GetId3\Handler\BaseHandler
 ftell ()
 
 fread ($bytes)
 
 fseek ($bytes, $whence=SEEK_SET)
 
 feof ()
 
 isDependencyFor ($module)
 
 error ($text)
 
 warning ($text)
 
- Protected Attributes inherited from GetId3\Handler\BaseHandler
 $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 //.

module for analyzing PhotoCD (PCD) Image files

Author
James Heinrich info@.nosp@m.geti.nosp@m.d3.or.nosp@m.g http://www.getid3.org

Definition at line 28 of file Pcd.php.

Member Function Documentation

◆ analyze()

GetId3\Module\Graphic\Pcd::analyze ( )

Definition at line 39 of file Pcd.php.

References $info, $x, $y, array, GetId3\Handler\BaseHandler\fread(), GetId3\Handler\BaseHandler\fseek(), and GetId3\Module\Graphic\Pcd\YCbCr2RGB().

40  {
41  $info = &$this->getid3->info;
42 
43  $info['fileformat'] = 'pcd';
44  $info['video']['dataformat'] = 'pcd';
45  $info['video']['lossless'] = false;
46 
47  fseek($this->getid3->fp, $info['avdataoffset'] + 72, SEEK_SET);
48 
49  $PCDflags = fread($this->getid3->fp, 1);
50  $PCDisVertical = ((ord($PCDflags) & 0x01) ? true : false);
51 
52  if ($PCDisVertical) {
53  $info['video']['resolution_x'] = 3072;
54  $info['video']['resolution_y'] = 2048;
55  } else {
56  $info['video']['resolution_x'] = 2048;
57  $info['video']['resolution_y'] = 3072;
58  }
59 
60  if ($this->ExtractData > 3) {
61 
62  $info['error'][] = 'Cannot extract PSD image data for detail levels above BASE (level-3) because encrypted with Kodak-proprietary compression/encryption.';
63 
64  } elseif ($this->ExtractData > 0) {
65 
66  $PCD_levels[1] = array( 192, 128, 0x02000); // BASE/16
67  $PCD_levels[2] = array( 384, 256, 0x0B800); // BASE/4
68  $PCD_levels[3] = array( 768, 512, 0x30000); // BASE
69  //$PCD_levels[4] = array(1536, 1024, ??); // BASE*4 - encrypted with Kodak-proprietary compression/encryption
70  //$PCD_levels[5] = array(3072, 2048, ??); // BASE*16 - encrypted with Kodak-proprietary compression/encryption
71  //$PCD_levels[6] = array(6144, 4096, ??); // BASE*64 - encrypted with Kodak-proprietary compression/encryption; PhotoCD-Pro only
72 
73  list($PCD_width, $PCD_height, $PCD_dataOffset) = $PCD_levels[3];
74 
75  fseek($this->getid3->fp, $info['avdataoffset'] + $PCD_dataOffset, SEEK_SET);
76 
77  for ($y = 0; $y < $PCD_height; $y += 2) {
78  // The image-data of these subtypes start at the respective offsets of 02000h, 0b800h and 30000h.
79  // To decode the YcbYr to the more usual RGB-code, three lines of data have to be read, each
80  // consisting of ‘w’ bytes, where ‘w’ is the width of the image-subtype. The first ‘w’ bytes and
81  // the first half of the third ‘w’ bytes contain data for the first RGB-line, the second ‘w’ bytes
82  // and the second half of the third ‘w’ bytes contain data for a second RGB-line.
83 
84  $PCD_data_Y1 = fread($this->getid3->fp, $PCD_width);
85  $PCD_data_Y2 = fread($this->getid3->fp, $PCD_width);
86  $PCD_data_Cb = fread($this->getid3->fp, intval(round($PCD_width / 2)));
87  $PCD_data_Cr = fread($this->getid3->fp, intval(round($PCD_width / 2)));
88 
89  for ($x = 0; $x < $PCD_width; $x++) {
90  if ($PCDisVertical) {
91  $info['pcd']['data'][$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)}));
92  $info['pcd']['data'][$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)}));
93  } else {
94  $info['pcd']['data'][$y][$x] = $this->YCbCr2RGB(ord($PCD_data_Y1{$x}), ord($PCD_data_Cb{floor($x / 2)}), ord($PCD_data_Cr{floor($x / 2)}));
95  $info['pcd']['data'][$y + 1][$x] = $this->YCbCr2RGB(ord($PCD_data_Y2{$x}), ord($PCD_data_Cb{floor($x / 2)}), ord($PCD_data_Cr{floor($x / 2)}));
96  }
97  }
98  }
99 
100  // Example for plotting extracted data
101  //getid3_lib::IncludeDependency(GetId3Core::getIncludePath().'module.audio.ac3.php', __FILE__, true);
102  //if ($PCDisVertical) {
103  // $BMPinfo['resolution_x'] = $PCD_height;
104  // $BMPinfo['resolution_y'] = $PCD_width;
105  //} else {
106  // $BMPinfo['resolution_x'] = $PCD_width;
107  // $BMPinfo['resolution_y'] = $PCD_height;
108  //}
109  //$BMPinfo['bmp']['data'] = $info['pcd']['data'];
110  //getid3_bmp::PlotBMP($BMPinfo);
111  //exit;
112 
113  }
114 
115  }
$x
$x
Definition: example_009.php:98
GetId3\Handler\BaseHandler\fseek
fseek($bytes, $whence=SEEK_SET)
Definition: BaseHandler.php:148
$info
$info
Definition: example_052.php:80
$y
$y
Definition: example_007.php:83
GetId3\Module\Graphic\Pcd\YCbCr2RGB
YCbCr2RGB($Y, $Cb, $Cr)
array $YCbCr_constants
Definition: Pcd.php:125
array
Create styles array
The data for the language used.
Definition: 40duplicateStyle.php:19
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◆ YCbCr2RGB()

GetId3\Module\Graphic\Pcd::YCbCr2RGB (   $Y,
  $Cb,
  $Cr 
)

array $YCbCr_constants

Parameters
type$Y
type$Cb
type$Cr
Returns
type

Definition at line 125 of file Pcd.php.

References array.

Referenced by GetId3\Module\Graphic\Pcd\analyze().

126  {
127  static $YCbCr_constants = array();
128  if (empty($YCbCr_constants)) {
129  $YCbCr_constants['red']['Y'] = 0.0054980 * 256;
130  $YCbCr_constants['red']['Cb'] = 0.0000000 * 256;
131  $YCbCr_constants['red']['Cr'] = 0.0051681 * 256;
132  $YCbCr_constants['green']['Y'] = 0.0054980 * 256;
133  $YCbCr_constants['green']['Cb'] = -0.0015446 * 256;
134  $YCbCr_constants['green']['Cr'] = -0.0026325 * 256;
135  $YCbCr_constants['blue']['Y'] = 0.0054980 * 256;
136  $YCbCr_constants['blue']['Cb'] = 0.0079533 * 256;
137  $YCbCr_constants['blue']['Cr'] = 0.0000000 * 256;
138  }
139 
140  $RGBcolor = array('red'=>0, 'green'=>0, 'blue'=>0);
141  foreach ($RGBcolor as $rgbname => $dummy) {
142  $RGBcolor[$rgbname] = max(0,
143  min(255,
144  intval(
145  round(
146  ($YCbCr_constants[$rgbname]['Y'] * $Y) +
147  ($YCbCr_constants[$rgbname]['Cb'] * ($Cb - 156)) +
148  ($YCbCr_constants[$rgbname]['Cr'] * ($Cr - 137))
149  )
150  )
151  )
152  );
153  }
154 
155  return (($RGBcolor['red'] * 65536) + ($RGBcolor['green'] * 256) + $RGBcolor['blue']);
156  }
array
Create styles array
The data for the language used.
Definition: 40duplicateStyle.php:19
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Field Documentation

◆ $ExtractData

GetId3\Module\Graphic\Pcd::$ExtractData = 0

Definition at line 34 of file Pcd.php.

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