ILIAS  release_5-1 Revision 5.0.0-5477-g43f3e3fab5f
Public Member Functions
getid3_tiff Class Reference

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

+ Inheritance diagram for getid3_tiff:
+ Collaboration diagram for getid3_tiff:

Public Member Functions

 getid3_tiff (&$fd, &$ThisFileInfo)
 
 TIFFendian2Int ($bytestring, $byteorder)
 
 TIFFcompressionMethod ($id)
 
 TIFFcommentName ($id)
 
 Analyze ()
 
 TIFFendian2Int ($bytestring, $byteorder)
 
 TIFFcompressionMethod ($id)
 
 TIFFcommentName ($id)
 
- 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)
 

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 17 of file module.graphic.tiff.php.

Member Function Documentation

◆ Analyze()

getid3_tiff::Analyze ( )

Reimplemented from getid3_handler.

Definition at line 21 of file module.graphic.tiff.php.

21 {
22 $info = &$this->getid3->info;
23
24 $this->fseek($info['avdataoffset']);
25 $TIFFheader = $this->fread(4);
26
27 switch (substr($TIFFheader, 0, 2)) {
28 case 'II':
29 $info['tiff']['byte_order'] = 'Intel';
30 break;
31 case 'MM':
32 $info['tiff']['byte_order'] = 'Motorola';
33 break;
34 default:
35 $info['error'][] = 'Invalid TIFF byte order identifier ('.substr($TIFFheader, 0, 2).') at offset '.$info['avdataoffset'];
36 return false;
37 break;
38 }
39
40 $info['fileformat'] = 'tiff';
41 $info['video']['dataformat'] = 'tiff';
42 $info['video']['lossless'] = true;
43 $info['tiff']['ifd'] = array();
44 $CurrentIFD = array();
45
46 $FieldTypeByteLength = array(1=>1, 2=>1, 3=>2, 4=>4, 5=>8);
47
48 $nextIFDoffset = $this->TIFFendian2Int($this->fread(4), $info['tiff']['byte_order']);
49
50 while ($nextIFDoffset > 0) {
51
52 $CurrentIFD['offset'] = $nextIFDoffset;
53
54 $this->fseek($info['avdataoffset'] + $nextIFDoffset);
55 $CurrentIFD['fieldcount'] = $this->TIFFendian2Int($this->fread(2), $info['tiff']['byte_order']);
56
57 for ($i = 0; $i < $CurrentIFD['fieldcount']; $i++) {
58 $CurrentIFD['fields'][$i]['raw']['tag'] = $this->TIFFendian2Int($this->fread(2), $info['tiff']['byte_order']);
59 $CurrentIFD['fields'][$i]['raw']['type'] = $this->TIFFendian2Int($this->fread(2), $info['tiff']['byte_order']);
60 $CurrentIFD['fields'][$i]['raw']['length'] = $this->TIFFendian2Int($this->fread(4), $info['tiff']['byte_order']);
61 $CurrentIFD['fields'][$i]['raw']['offset'] = $this->fread(4);
62
63 switch ($CurrentIFD['fields'][$i]['raw']['type']) {
64 case 1: // BYTE An 8-bit unsigned integer.
65 if ($CurrentIFD['fields'][$i]['raw']['length'] <= 4) {
66 $CurrentIFD['fields'][$i]['value'] = $this->TIFFendian2Int(substr($CurrentIFD['fields'][$i]['raw']['offset'], 0, 1), $info['tiff']['byte_order']);
67 } else {
68 $CurrentIFD['fields'][$i]['offset'] = $this->TIFFendian2Int($CurrentIFD['fields'][$i]['raw']['offset'], $info['tiff']['byte_order']);
69 }
70 break;
71
72 case 2: // ASCII 8-bit bytes that store ASCII codes; the last byte must be null.
73 if ($CurrentIFD['fields'][$i]['raw']['length'] <= 4) {
74 $CurrentIFD['fields'][$i]['value'] = substr($CurrentIFD['fields'][$i]['raw']['offset'], 3);
75 } else {
76 $CurrentIFD['fields'][$i]['offset'] = $this->TIFFendian2Int($CurrentIFD['fields'][$i]['raw']['offset'], $info['tiff']['byte_order']);
77 }
78 break;
79
80 case 3: // SHORT A 16-bit (2-byte) unsigned integer.
81 if ($CurrentIFD['fields'][$i]['raw']['length'] <= 2) {
82 $CurrentIFD['fields'][$i]['value'] = $this->TIFFendian2Int(substr($CurrentIFD['fields'][$i]['raw']['offset'], 0, 2), $info['tiff']['byte_order']);
83 } else {
84 $CurrentIFD['fields'][$i]['offset'] = $this->TIFFendian2Int($CurrentIFD['fields'][$i]['raw']['offset'], $info['tiff']['byte_order']);
85 }
86 break;
87
88 case 4: // LONG A 32-bit (4-byte) unsigned integer.
89 if ($CurrentIFD['fields'][$i]['raw']['length'] <= 1) {
90 $CurrentIFD['fields'][$i]['value'] = $this->TIFFendian2Int($CurrentIFD['fields'][$i]['raw']['offset'], $info['tiff']['byte_order']);
91 } else {
92 $CurrentIFD['fields'][$i]['offset'] = $this->TIFFendian2Int($CurrentIFD['fields'][$i]['raw']['offset'], $info['tiff']['byte_order']);
93 }
94 break;
95
96 case 5: // RATIONAL Two LONG_s: the first represents the numerator of a fraction, the second the denominator.
97 break;
98 }
99 }
100
101 $info['tiff']['ifd'][] = $CurrentIFD;
102 $CurrentIFD = array();
103 $nextIFDoffset = $this->TIFFendian2Int($this->fread(4), $info['tiff']['byte_order']);
104
105 }
106
107 foreach ($info['tiff']['ifd'] as $IFDid => $IFDarray) {
108 foreach ($IFDarray['fields'] as $key => $fieldarray) {
109 switch ($fieldarray['raw']['tag']) {
110 case 256: // ImageWidth
111 case 257: // ImageLength
112 case 258: // BitsPerSample
113 case 259: // Compression
114 if (!isset($fieldarray['value'])) {
115 $this->fseek($fieldarray['offset']);
116 $info['tiff']['ifd'][$IFDid]['fields'][$key]['raw']['data'] = $this->fread($fieldarray['raw']['length'] * $FieldTypeByteLength[$fieldarray['raw']['type']]);
117
118 }
119 break;
120
121 case 270: // ImageDescription
122 case 271: // Make
123 case 272: // Model
124 case 305: // Software
125 case 306: // DateTime
126 case 315: // Artist
127 case 316: // HostComputer
128 if (isset($fieldarray['value'])) {
129 $info['tiff']['ifd'][$IFDid]['fields'][$key]['raw']['data'] = $fieldarray['value'];
130 } else {
131 $this->fseek($fieldarray['offset']);
132 $info['tiff']['ifd'][$IFDid]['fields'][$key]['raw']['data'] = $this->fread($fieldarray['raw']['length'] * $FieldTypeByteLength[$fieldarray['raw']['type']]);
133
134 }
135 break;
136 }
137 switch ($fieldarray['raw']['tag']) {
138 case 256: // ImageWidth
139 $info['video']['resolution_x'] = $fieldarray['value'];
140 break;
141
142 case 257: // ImageLength
143 $info['video']['resolution_y'] = $fieldarray['value'];
144 break;
145
146 case 258: // BitsPerSample
147 if (isset($fieldarray['value'])) {
148 $info['video']['bits_per_sample'] = $fieldarray['value'];
149 } else {
150 $info['video']['bits_per_sample'] = 0;
151 for ($i = 0; $i < $fieldarray['raw']['length']; $i++) {
152 $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']);
153 }
154 }
155 break;
156
157 case 259: // Compression
158 $info['video']['codec'] = $this->TIFFcompressionMethod($fieldarray['value']);
159 break;
160
161 case 270: // ImageDescription
162 case 271: // Make
163 case 272: // Model
164 case 305: // Software
165 case 306: // DateTime
166 case 315: // Artist
167 case 316: // HostComputer
168 $TIFFcommentName = $this->TIFFcommentName($fieldarray['raw']['tag']);
169 if (isset($info['tiff']['comments'][$TIFFcommentName])) {
170 $info['tiff']['comments'][$TIFFcommentName][] = $info['tiff']['ifd'][$IFDid]['fields'][$key]['raw']['data'];
171 } else {
172 $info['tiff']['comments'][$TIFFcommentName] = array($info['tiff']['ifd'][$IFDid]['fields'][$key]['raw']['data']);
173 }
174 break;
175
176 default:
177 break;
178 }
179 }
180 }
181
182 return true;
183 }
getid3_handler\fseek
fseek($bytes, $whence=SEEK_SET)
Definition: getid3.php:1697
getid3_handler\fread
fread($bytes)
Definition: getid3.php:1685
getid3_tiff\TIFFcommentName
TIFFcommentName($id)
Definition: module.graphic.tiff.php:202
getid3_tiff\TIFFcompressionMethod
TIFFcompressionMethod($id)
Definition: module.graphic.tiff.php:188
getid3_tiff\TIFFendian2Int
TIFFendian2Int($bytestring, $byteorder)
Definition: module.graphic.tiff.php:179
$info
$info
Definition: example_052.php:80

References $info, getid3_handler\fread(), getid3_handler\fseek(), TIFFcommentName(), TIFFcompressionMethod(), and TIFFendian2Int().

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◆ getid3_tiff()

getid3_tiff::getid3_tiff ( &  $fd,
&  $ThisFileInfo 
)

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

20 {
21
22 fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET);
23 $TIFFheader = fread($fd, 4);
24
25 switch (substr($TIFFheader, 0, 2)) {
26 case 'II':
27 $ThisFileInfo['tiff']['byte_order'] = 'Intel';
28 break;
29 case 'MM':
30 $ThisFileInfo['tiff']['byte_order'] = 'Motorola';
31 break;
32 default:
33 $ThisFileInfo['error'][] = 'Invalid TIFF byte order identifier ('.substr($TIFFheader, 0, 2).') at offset '.$ThisFileInfo['avdataoffset'];
34 return false;
35 break;
36 }
37
38 $ThisFileInfo['fileformat'] = 'tiff';
39 $ThisFileInfo['video']['dataformat'] = 'tiff';
40 $ThisFileInfo['video']['lossless'] = true;
41 $ThisFileInfo['tiff']['ifd'] = array();
42 $CurrentIFD = array();
43
44 $FieldTypeByteLength = array(1=>1, 2=>1, 3=>2, 4=>4, 5=>8);
45
46 $nextIFDoffset = $this->TIFFendian2Int(fread($fd, 4), $ThisFileInfo['tiff']['byte_order']);
47
48 while ($nextIFDoffset > 0) {
49
50 $CurrentIFD['offset'] = $nextIFDoffset;
51
52 fseek($fd, $ThisFileInfo['avdataoffset'] + $nextIFDoffset, SEEK_SET);
53 $CurrentIFD['fieldcount'] = $this->TIFFendian2Int(fread($fd, 2), $ThisFileInfo['tiff']['byte_order']);
54
55 for ($i = 0; $i < $CurrentIFD['fieldcount']; $i++) {
56 $CurrentIFD['fields'][$i]['raw']['tag'] = $this->TIFFendian2Int(fread($fd, 2), $ThisFileInfo['tiff']['byte_order']);
57 $CurrentIFD['fields'][$i]['raw']['type'] = $this->TIFFendian2Int(fread($fd, 2), $ThisFileInfo['tiff']['byte_order']);
58 $CurrentIFD['fields'][$i]['raw']['length'] = $this->TIFFendian2Int(fread($fd, 4), $ThisFileInfo['tiff']['byte_order']);
59 $CurrentIFD['fields'][$i]['raw']['offset'] = fread($fd, 4);
60
61 switch ($CurrentIFD['fields'][$i]['raw']['type']) {
62 case 1: // BYTE An 8-bit unsigned integer.
63 if ($CurrentIFD['fields'][$i]['raw']['length'] <= 4) {
64 $CurrentIFD['fields'][$i]['value'] = $this->TIFFendian2Int(substr($CurrentIFD['fields'][$i]['raw']['offset'], 0, 1), $ThisFileInfo['tiff']['byte_order']);
65 } else {
66 $CurrentIFD['fields'][$i]['offset'] = $this->TIFFendian2Int($CurrentIFD['fields'][$i]['raw']['offset'], $ThisFileInfo['tiff']['byte_order']);
67 }
68 break;
69
70 case 2: // ASCII 8-bit bytes that store ASCII codes; the last byte must be null.
71 if ($CurrentIFD['fields'][$i]['raw']['length'] <= 4) {
72 $CurrentIFD['fields'][$i]['value'] = substr($CurrentIFD['fields'][$i]['raw']['offset'], 3);
73 } else {
74 $CurrentIFD['fields'][$i]['offset'] = $this->TIFFendian2Int($CurrentIFD['fields'][$i]['raw']['offset'], $ThisFileInfo['tiff']['byte_order']);
75 }
76 break;
77
78 case 3: // SHORT A 16-bit (2-byte) unsigned integer.
79 if ($CurrentIFD['fields'][$i]['raw']['length'] <= 2) {
80 $CurrentIFD['fields'][$i]['value'] = $this->TIFFendian2Int(substr($CurrentIFD['fields'][$i]['raw']['offset'], 0, 2), $ThisFileInfo['tiff']['byte_order']);
81 } else {
82 $CurrentIFD['fields'][$i]['offset'] = $this->TIFFendian2Int($CurrentIFD['fields'][$i]['raw']['offset'], $ThisFileInfo['tiff']['byte_order']);
83 }
84 break;
85
86 case 4: // LONG A 32-bit (4-byte) unsigned integer.
87 if ($CurrentIFD['fields'][$i]['raw']['length'] <= 1) {
88 $CurrentIFD['fields'][$i]['value'] = $this->TIFFendian2Int($CurrentIFD['fields'][$i]['raw']['offset'], $ThisFileInfo['tiff']['byte_order']);
89 } else {
90 $CurrentIFD['fields'][$i]['offset'] = $this->TIFFendian2Int($CurrentIFD['fields'][$i]['raw']['offset'], $ThisFileInfo['tiff']['byte_order']);
91 }
92 break;
93
94 case 5: // RATIONAL Two LONG_s: the first represents the numerator of a fraction, the second the denominator.
95 break;
96 }
97 }
98
99 $ThisFileInfo['tiff']['ifd'][] = $CurrentIFD;
100 $CurrentIFD = array();
101 $nextIFDoffset = $this->TIFFendian2Int(fread($fd, 4), $ThisFileInfo['tiff']['byte_order']);
102
103 }
104
105 foreach ($ThisFileInfo['tiff']['ifd'] as $IFDid => $IFDarray) {
106 foreach ($IFDarray['fields'] as $key => $fieldarray) {
107 switch ($fieldarray['raw']['tag']) {
108 case 256: // ImageWidth
109 case 257: // ImageLength
110 case 258: // BitsPerSample
111 case 259: // Compression
112 if (!isset($fieldarray['value'])) {
113 fseek($fd, $fieldarray['offset'], SEEK_SET);
114 $ThisFileInfo['tiff']['ifd'][$IFDid]['fields'][$key]['raw']['data'] = fread($fd, $fieldarray['raw']['length'] * $FieldTypeByteLength[$fieldarray['raw']['type']]);
115
116 }
117 break;
118
119 case 270: // ImageDescription
120 case 271: // Make
121 case 272: // Model
122 case 305: // Software
123 case 306: // DateTime
124 case 315: // Artist
125 case 316: // HostComputer
126 if (isset($fieldarray['value'])) {
127 $ThisFileInfo['tiff']['ifd'][$IFDid]['fields'][$key]['raw']['data'] = $fieldarray['value'];
128 } else {
129 fseek($fd, $fieldarray['offset'], SEEK_SET);
130 $ThisFileInfo['tiff']['ifd'][$IFDid]['fields'][$key]['raw']['data'] = fread($fd, $fieldarray['raw']['length'] * $FieldTypeByteLength[$fieldarray['raw']['type']]);
131
132 }
133 break;
134 }
135 switch ($fieldarray['raw']['tag']) {
136 case 256: // ImageWidth
137 $ThisFileInfo['video']['resolution_x'] = $fieldarray['value'];
138 break;
139
140 case 257: // ImageLength
141 $ThisFileInfo['video']['resolution_y'] = $fieldarray['value'];
142 break;
143
144 case 258: // BitsPerSample
145 if (isset($fieldarray['value'])) {
146 $ThisFileInfo['video']['bits_per_sample'] = $fieldarray['value'];
147 } else {
148 $ThisFileInfo['video']['bits_per_sample'] = 0;
149 for ($i = 0; $i < $fieldarray['raw']['length']; $i++) {
150 $ThisFileInfo['video']['bits_per_sample'] += $this->TIFFendian2Int(substr($ThisFileInfo['tiff']['ifd'][$IFDid]['fields'][$key]['raw']['data'], $i * $FieldTypeByteLength[$fieldarray['raw']['type']], $FieldTypeByteLength[$fieldarray['raw']['type']]), $ThisFileInfo['tiff']['byte_order']);
151 }
152 }
153 break;
154
155 case 259: // Compression
156 $ThisFileInfo['video']['codec'] = $this->TIFFcompressionMethod($fieldarray['value']);
157 break;
158
159 case 270: // ImageDescription
160 case 271: // Make
161 case 272: // Model
162 case 305: // Software
163 case 306: // DateTime
164 case 315: // Artist
165 case 316: // HostComputer
166 @$ThisFileInfo['tiff']['comments'][$this->TIFFcommentName($fieldarray['raw']['tag'])][] = $ThisFileInfo['tiff']['ifd'][$IFDid]['fields'][$key]['raw']['data'];
167 break;
168
169 default:
170 break;
171 }
172 }
173 }
174
175 return true;
176 }

References getid3_handler\fread(), getid3_handler\fseek(), TIFFcommentName(), TIFFcompressionMethod(), and TIFFendian2Int().

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◆ TIFFcommentName() [1/2]

getid3_tiff::TIFFcommentName (   $id)

Definition at line 202 of file module.graphic.tiff.php.

202 {
203 static $TIFFcommentName = array();
204 if (empty($TIFFcommentName)) {
205 $TIFFcommentName = array(
206 270 => 'imagedescription',
207 271 => 'make',
208 272 => 'model',
209 305 => 'software',
210 306 => 'datetime',
211 315 => 'artist',
212 316 => 'hostcomputer',
213 );
214 }
215 return (isset($TIFFcommentName[$id]) ? $TIFFcommentName[$id] : 'unknown/invalid ('.$id.')');
216 }

Referenced by Analyze(), and getid3_tiff().

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◆ TIFFcommentName() [2/2]

getid3_tiff::TIFFcommentName (   $id)

Definition at line 209 of file module.graphic.tiff.php.

209 {
210 static $TIFFcommentName = array();
211 if (empty($TIFFcommentName)) {
212 $TIFFcommentName = array(
213 270 => 'imagedescription',
214 271 => 'make',
215 272 => 'model',
216 305 => 'software',
217 306 => 'datetime',
218 315 => 'artist',
219 316 => 'hostcomputer',
220 );
221 }
222 return (isset($TIFFcommentName[$id]) ? $TIFFcommentName[$id] : 'unknown/invalid ('.$id.')');
223 }

◆ TIFFcompressionMethod() [1/2]

getid3_tiff::TIFFcompressionMethod (   $id)

Definition at line 188 of file module.graphic.tiff.php.

188 {
189 static $TIFFcompressionMethod = array();
190 if (empty($TIFFcompressionMethod)) {
191 $TIFFcompressionMethod = array(
192 1 => 'Uncompressed',
193 2 => 'Huffman',
194 3 => 'Fax - CCITT 3',
195 5 => 'LZW',
196 32773 => 'PackBits',
197 );
198 }
199 return (isset($TIFFcompressionMethod[$id]) ? $TIFFcompressionMethod[$id] : 'unknown/invalid ('.$id.')');
200 }

Referenced by Analyze(), and getid3_tiff().

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◆ TIFFcompressionMethod() [2/2]

getid3_tiff::TIFFcompressionMethod (   $id)

Definition at line 195 of file module.graphic.tiff.php.

195 {
196 static $TIFFcompressionMethod = array();
197 if (empty($TIFFcompressionMethod)) {
198 $TIFFcompressionMethod = array(
199 1 => 'Uncompressed',
200 2 => 'Huffman',
201 3 => 'Fax - CCITT 3',
202 5 => 'LZW',
203 32773 => 'PackBits',
204 );
205 }
206 return (isset($TIFFcompressionMethod[$id]) ? $TIFFcompressionMethod[$id] : 'unknown/invalid ('.$id.')');
207 }

◆ TIFFendian2Int() [1/2]

getid3_tiff::TIFFendian2Int (   $bytestring,
  $byteorder 
)

Definition at line 179 of file module.graphic.tiff.php.

179 {
180 if ($byteorder == 'Intel') {
181 return getid3_lib::LittleEndian2Int($bytestring);
182 } elseif ($byteorder == 'Motorola') {
183 return getid3_lib::BigEndian2Int($bytestring);
184 }
185 return false;
186 }
getid3_lib\LittleEndian2Int
LittleEndian2Int($byteword, $signed=false)
Definition: getid3.lib.php:266
getid3_lib\BigEndian2Int
BigEndian2Int($byteword, $synchsafe=false, $signed=false)
Definition: getid3.lib.php:234

References getid3_lib\BigEndian2Int(), and getid3_lib\LittleEndian2Int().

Referenced by Analyze(), and getid3_tiff().

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◆ TIFFendian2Int() [2/2]

getid3_tiff::TIFFendian2Int (   $bytestring,
  $byteorder 
)

Definition at line 186 of file module.graphic.tiff.php.

186 {
187 if ($byteorder == 'Intel') {
188 return getid3_lib::LittleEndian2Int($bytestring);
189 } elseif ($byteorder == 'Motorola') {
190 return getid3_lib::BigEndian2Int($bytestring);
191 }
192 return false;
193 }

References getid3_lib\BigEndian2Int(), and getid3_lib\LittleEndian2Int().

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