ILIAS  release_5-2 Revision v5.2.25-18-g3f80b828510
Public Member Functions
GetId3\Module\Graphic\Tiff Class Reference

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

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

Public Member Functions

 analyze ()
 
 TIFFendian2Int ($bytestring, $byteorder)
 
 TIFFcompressionMethod ($id)
 @staticvar array $TIFFcompressionMethod More...
 
 TIFFcommentName ($id)
 @staticvar array $TIFFcommentName 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)
 

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 TIFF files

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

Definition at line 29 of file Tiff.php.

Member Function Documentation

◆ analyze()

GetId3\Module\Graphic\Tiff::analyze ( )
Returns
boolean

Reimplemented from GetId3\Handler\BaseHandler.

Definition at line 36 of file Tiff.php.

37 {
38 $info = &$this->getid3->info;
39
40 fseek($this->getid3->fp, $info['avdataoffset'], SEEK_SET);
41 $TIFFheader = fread($this->getid3->fp, 4);
42
43 switch (substr($TIFFheader, 0, 2)) {
44 case 'II':
45 $info['tiff']['byte_order'] = 'Intel';
46 break;
47 case 'MM':
48 $info['tiff']['byte_order'] = 'Motorola';
49 break;
50 default:
51 $info['error'][] = 'Invalid TIFF byte order identifier ('.substr($TIFFheader, 0, 2).') at offset '.$info['avdataoffset'];
52
53 return false;
54 break;
55 }
56
57 $info['fileformat'] = 'tiff';
58 $info['video']['dataformat'] = 'tiff';
59 $info['video']['lossless'] = true;
60 $info['tiff']['ifd'] = array();
61 $CurrentIFD = array();
62
63 $FieldTypeByteLength = array(1=>1, 2=>1, 3=>2, 4=>4, 5=>8);
64
65 $nextIFDoffset = $this->TIFFendian2Int(fread($this->getid3->fp, 4), $info['tiff']['byte_order']);
66
67 while ($nextIFDoffset > 0) {
68
69 $CurrentIFD['offset'] = $nextIFDoffset;
70
71 fseek($this->getid3->fp, $info['avdataoffset'] + $nextIFDoffset, SEEK_SET);
72 $CurrentIFD['fieldcount'] = $this->TIFFendian2Int(fread($this->getid3->fp, 2), $info['tiff']['byte_order']);
73
74 for ($i = 0; $i < $CurrentIFD['fieldcount']; $i++) {
75 $CurrentIFD['fields'][$i]['raw']['tag'] = $this->TIFFendian2Int(fread($this->getid3->fp, 2), $info['tiff']['byte_order']);
76 $CurrentIFD['fields'][$i]['raw']['type'] = $this->TIFFendian2Int(fread($this->getid3->fp, 2), $info['tiff']['byte_order']);
77 $CurrentIFD['fields'][$i]['raw']['length'] = $this->TIFFendian2Int(fread($this->getid3->fp, 4), $info['tiff']['byte_order']);
78 $CurrentIFD['fields'][$i]['raw']['offset'] = fread($this->getid3->fp, 4);
79
80 switch ($CurrentIFD['fields'][$i]['raw']['type']) {
81 case 1: // BYTE An 8-bit unsigned integer.
82 if ($CurrentIFD['fields'][$i]['raw']['length'] <= 4) {
83 $CurrentIFD['fields'][$i]['value'] = $this->TIFFendian2Int(substr($CurrentIFD['fields'][$i]['raw']['offset'], 0, 1), $info['tiff']['byte_order']);
84 } else {
85 $CurrentIFD['fields'][$i]['offset'] = $this->TIFFendian2Int($CurrentIFD['fields'][$i]['raw']['offset'], $info['tiff']['byte_order']);
86 }
87 break;
88
89 case 2: // ASCII 8-bit bytes that store ASCII codes; the last byte must be null.
90 if ($CurrentIFD['fields'][$i]['raw']['length'] <= 4) {
91 $CurrentIFD['fields'][$i]['value'] = substr($CurrentIFD['fields'][$i]['raw']['offset'], 3);
92 } else {
93 $CurrentIFD['fields'][$i]['offset'] = $this->TIFFendian2Int($CurrentIFD['fields'][$i]['raw']['offset'], $info['tiff']['byte_order']);
94 }
95 break;
96
97 case 3: // SHORT A 16-bit (2-byte) unsigned integer.
98 if ($CurrentIFD['fields'][$i]['raw']['length'] <= 2) {
99 $CurrentIFD['fields'][$i]['value'] = $this->TIFFendian2Int(substr($CurrentIFD['fields'][$i]['raw']['offset'], 0, 2), $info['tiff']['byte_order']);
100 } else {
101 $CurrentIFD['fields'][$i]['offset'] = $this->TIFFendian2Int($CurrentIFD['fields'][$i]['raw']['offset'], $info['tiff']['byte_order']);
102 }
103 break;
104
105 case 4: // LONG A 32-bit (4-byte) unsigned integer.
106 if ($CurrentIFD['fields'][$i]['raw']['length'] <= 1) {
107 $CurrentIFD['fields'][$i]['value'] = $this->TIFFendian2Int($CurrentIFD['fields'][$i]['raw']['offset'], $info['tiff']['byte_order']);
108 } else {
109 $CurrentIFD['fields'][$i]['offset'] = $this->TIFFendian2Int($CurrentIFD['fields'][$i]['raw']['offset'], $info['tiff']['byte_order']);
110 }
111 break;
112
113 case 5: // RATIONAL Two LONG_s: the first represents the numerator of a fraction, the second the denominator.
114 break;
115 }
116 }
117
118 $info['tiff']['ifd'][] = $CurrentIFD;
119 $CurrentIFD = array();
120 $nextIFDoffset = $this->TIFFendian2Int(fread($this->getid3->fp, 4), $info['tiff']['byte_order']);
121
122 }
123
124 foreach ($info['tiff']['ifd'] as $IFDid => $IFDarray) {
125 foreach ($IFDarray['fields'] as $key => $fieldarray) {
126 switch ($fieldarray['raw']['tag']) {
127 case 256: // ImageWidth
128 case 257: // ImageLength
129 case 258: // BitsPerSample
130 case 259: // Compression
131 if (!isset($fieldarray['value'])) {
132 fseek($this->getid3->fp, $fieldarray['offset'], SEEK_SET);
133 $info['tiff']['ifd'][$IFDid]['fields'][$key]['raw']['data'] = fread($this->getid3->fp, $fieldarray['raw']['length'] * $FieldTypeByteLength[$fieldarray['raw']['type']]);
134
135 }
136 break;
137
138 case 270: // ImageDescription
139 case 271: // Make
140 case 272: // Model
141 case 305: // Software
142 case 306: // DateTime
143 case 315: // Artist
144 case 316: // HostComputer
145 if (isset($fieldarray['value'])) {
146 $info['tiff']['ifd'][$IFDid]['fields'][$key]['raw']['data'] = $fieldarray['value'];
147 } else {
148 fseek($this->getid3->fp, $fieldarray['offset'], SEEK_SET);
149 $info['tiff']['ifd'][$IFDid]['fields'][$key]['raw']['data'] = fread($this->getid3->fp, $fieldarray['raw']['length'] * $FieldTypeByteLength[$fieldarray['raw']['type']]);
150
151 }
152 break;
153 }
154 switch ($fieldarray['raw']['tag']) {
155 case 256: // ImageWidth
156 $info['video']['resolution_x'] = $fieldarray['value'];
157 break;
158
159 case 257: // ImageLength
160 $info['video']['resolution_y'] = $fieldarray['value'];
161 break;
162
163 case 258: // BitsPerSample
164 if (isset($fieldarray['value'])) {
165 $info['video']['bits_per_sample'] = $fieldarray['value'];
166 } else {
167 $info['video']['bits_per_sample'] = 0;
168 for ($i = 0; $i < $fieldarray['raw']['length']; $i++) {
169 $info['video']['bits_per_sample'] += $this->TIFFendian2Int(substr($info['tiff']['ifd'][$IFDid]['fields'][$key]['raw']['data'], $i * $FieldTypeByteLength[$fieldarray['raw']['type']], $FieldTypeByteLength[$fieldarray['raw']['type']]), $info['tiff']['byte_order']);
170 }
171 }
172 break;
173
174 case 259: // Compression
175 $info['video']['codec'] = $this->TIFFcompressionMethod($fieldarray['value']);
176 break;
177
178 case 270: // ImageDescription
179 case 271: // Make
180 case 272: // Model
181 case 305: // Software
182 case 306: // DateTime
183 case 315: // Artist
184 case 316: // HostComputer
185 $TIFFcommentName = $this->TIFFcommentName($fieldarray['raw']['tag']);
186 if (isset($info['tiff']['comments'][$TIFFcommentName])) {
187 $info['tiff']['comments'][$TIFFcommentName][] = $info['tiff']['ifd'][$IFDid]['fields'][$key]['raw']['data'];
188 } else {
189 $info['tiff']['comments'][$TIFFcommentName] = array($info['tiff']['ifd'][$IFDid]['fields'][$key]['raw']['data']);
190 }
191 break;
192
193 default:
194 break;
195 }
196 }
197 }
198
199 return true;
200 }
GetId3\Handler\BaseHandler\fseek
fseek($bytes, $whence=SEEK_SET)
Definition: BaseHandler.php:148
GetId3\Module\Graphic\Tiff\TIFFcommentName
TIFFcommentName($id)
@staticvar array $TIFFcommentName
Definition: Tiff.php:247
GetId3\Module\Graphic\Tiff\TIFFcompressionMethod
TIFFcompressionMethod($id)
@staticvar array $TIFFcompressionMethod
Definition: Tiff.php:225
GetId3\Module\Graphic\Tiff\TIFFendian2Int
TIFFendian2Int($bytestring, $byteorder)
Definition: Tiff.php:208
$info
$info
Definition: example_052.php:80

References $info, GetId3\Handler\BaseHandler\fread(), GetId3\Handler\BaseHandler\fseek(), GetId3\Module\Graphic\Tiff\TIFFcommentName(), GetId3\Module\Graphic\Tiff\TIFFcompressionMethod(), and GetId3\Module\Graphic\Tiff\TIFFendian2Int().

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◆ TIFFcommentName()

GetId3\Module\Graphic\Tiff::TIFFcommentName (   $id)

@staticvar array $TIFFcommentName

Parameters
type$id
Returns
type

Definition at line 247 of file Tiff.php.

248 {
249 static $TIFFcommentName = array();
250 if (empty($TIFFcommentName)) {
251 $TIFFcommentName = array(
252 270 => 'imagedescription',
253 271 => 'make',
254 272 => 'model',
255 305 => 'software',
256 306 => 'datetime',
257 315 => 'artist',
258 316 => 'hostcomputer',
259 );
260 }
261
262 return (isset($TIFFcommentName[$id]) ? $TIFFcommentName[$id] : 'unknown/invalid ('.$id.')');
263 }

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

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◆ TIFFcompressionMethod()

GetId3\Module\Graphic\Tiff::TIFFcompressionMethod (   $id)

@staticvar array $TIFFcompressionMethod

Parameters
type$id
Returns
type

Definition at line 225 of file Tiff.php.

226 {
227 static $TIFFcompressionMethod = array();
228 if (empty($TIFFcompressionMethod)) {
229 $TIFFcompressionMethod = array(
230 1 => 'Uncompressed',
231 2 => 'Huffman',
232 3 => 'Fax - CCITT 3',
233 5 => 'LZW',
234 32773 => 'PackBits',
235 );
236 }
237
238 return (isset($TIFFcompressionMethod[$id]) ? $TIFFcompressionMethod[$id] : 'unknown/invalid ('.$id.')');
239 }

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

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◆ TIFFendian2Int()

GetId3\Module\Graphic\Tiff::TIFFendian2Int (   $bytestring,
  $byteorder 
)
Parameters
type$bytestring
type$byteorder
Returns
boolean

Definition at line 208 of file Tiff.php.

209 {
210 if ($byteorder == 'Intel') {
211 return Helper::LittleEndian2Int($bytestring);
212 } elseif ($byteorder == 'Motorola') {
213 return Helper::BigEndian2Int($bytestring);
214 }
215
216 return false;
217 }
GetId3\Lib\Helper\BigEndian2Int
static BigEndian2Int($byteword, $synchsafe=false, $signed=false)
Definition: Helper.php:374
GetId3\Lib\Helper\LittleEndian2Int
static LittleEndian2Int($byteword, $signed=false)
Definition: Helper.php:413

References GetId3\Lib\Helper\BigEndian2Int(), and GetId3\Lib\Helper\LittleEndian2Int().

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

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