ILIAS  release_5-1 Revision 5.0.0-5477-g43f3e3fab5f
write.real.php
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1<?php
4// available at http://getid3.sourceforge.net //
5// or http://www.getid3.org //
7// See readme.txt for more details //
9// //
10// write.real.php //
11// module for writing RealAudio/RealVideo tags //
12// dependencies: module.tag.real.php //
13// ///
15
16class getid3_write_real
17{
18 var $filename;
19 var $tag_data = array();
20 var $warnings = array(); // any non-critical errors will be stored here
21 var $errors = array(); // any critical errors will be stored here
22 var $paddedlength = 512; // minimum length of CONT tag in bytes
23
24 function getid3_write_real() {
25 return true;
26 }
27
28 function WriteReal() {
29 // File MUST be writeable - CHMOD(646) at least
30 if (is_writeable($this->filename)) {
31 if ($fp_source = @fopen($this->filename, 'r+b')) {
32
33 // Initialize getID3 engine
34 $getID3 = new getID3;
35 $OldThisFileInfo = $getID3->analyze($this->filename);
36 if (empty($OldThisFileInfo['real']['chunks']) && !empty($OldThisFileInfo['real']['old_ra_header'])) {
37 $this->errors[] = 'Cannot write Real tags on old-style file format';
38 fclose($fp_source);
39 return false;
40 }
41
42 if (empty($OldThisFileInfo['real']['chunks'])) {
43 $this->errors[] = 'Cannot write Real tags because cannot find DATA chunk in file';
44 fclose($fp_source);
45 return false;
46 }
47 foreach ($OldThisFileInfo['real']['chunks'] as $chunknumber => $chunkarray) {
48 $oldChunkInfo[$chunkarray['name']] = $chunkarray;
49 }
50 if (!empty($oldChunkInfo['CONT']['length'])) {
51 $this->paddedlength = max($oldChunkInfo['CONT']['length'], $this->paddedlength);
52 }
53
54 $new_CONT_tag_data = $this->GenerateCONTchunk();
55 $new_PROP_tag_data = $this->GeneratePROPchunk($OldThisFileInfo['real']['chunks'], $new_CONT_tag_data);
56 $new__RMF_tag_data = $this->GenerateRMFchunk($OldThisFileInfo['real']['chunks']);
57
58 if (@$oldChunkInfo['.RMF']['length'] == strlen($new__RMF_tag_data)) {
59 fseek($fp_source, $oldChunkInfo['.RMF']['offset'], SEEK_SET);
60 fwrite($fp_source, $new__RMF_tag_data);
61 } else {
62 $this->errors[] = 'new .RMF tag ('.strlen($new__RMF_tag_data).' bytes) different length than old .RMF tag ('.$oldChunkInfo['.RMF']['length'].' bytes)';
63 fclose($fp_source);
64 return false;
65 }
66
67 if (@$oldChunkInfo['PROP']['length'] == strlen($new_PROP_tag_data)) {
68 fseek($fp_source, $oldChunkInfo['PROP']['offset'], SEEK_SET);
69 fwrite($fp_source, $new_PROP_tag_data);
70 } else {
71 $this->errors[] = 'new PROP tag ('.strlen($new_PROP_tag_data).' bytes) different length than old PROP tag ('.$oldChunkInfo['PROP']['length'].' bytes)';
72 fclose($fp_source);
73 return false;
74 }
75
76 if (@$oldChunkInfo['CONT']['length'] == strlen($new_CONT_tag_data)) {
77
78 // new data length is same as old data length - just overwrite
79 fseek($fp_source, $oldChunkInfo['CONT']['offset'], SEEK_SET);
80 fwrite($fp_source, $new_CONT_tag_data);
81 fclose($fp_source);
82 return true;
83
84 } else {
85
86 if (empty($oldChunkInfo['CONT'])) {
87 // no existing CONT chunk
88 $BeforeOffset = $oldChunkInfo['DATA']['offset'];
89 $AfterOffset = $oldChunkInfo['DATA']['offset'];
90 } else {
91 // new data is longer than old data
92 $BeforeOffset = $oldChunkInfo['CONT']['offset'];
93 $AfterOffset = $oldChunkInfo['CONT']['offset'] + $oldChunkInfo['CONT']['length'];
94 }
95 if ($tempfilename = tempnam('*', 'getID3')) {
96 ob_start();
97 if ($fp_temp = fopen($tempfilename, 'wb')) {
98
99 rewind($fp_source);
100 fwrite($fp_temp, fread($fp_source, $BeforeOffset));
101 fwrite($fp_temp, $new_CONT_tag_data);
102 fseek($fp_source, $AfterOffset, SEEK_SET);
103 while ($buffer = fread($fp_source, GETID3_FREAD_BUFFER_SIZE)) {
104 fwrite($fp_temp, $buffer, strlen($buffer));
105 }
106 fclose($fp_temp);
107
108 if (copy($tempfilename, $this->filename)) {
109 unlink($tempfilename);
110 fclose($fp_source);
111 return true;
112 }
113 unlink($tempfilename);
114 $this->errors[] = 'FAILED: copy('.$tempfilename.', '.$this->filename.') - '.strip_tags(ob_get_contents());
115
116 } else {
117
118 $this->errors[] = 'Could not open '.$tempfilename.' mode "wb" - '.strip_tags(ob_get_contents());
119
120 }
121 ob_end_clean();
122 }
123 fclose($fp_source);
124 return false;
125
126 }
127
128
129 } else {
130 $this->errors[] = 'Could not open '.$this->filename.' mode "r+b"';
131 return false;
132 }
133 }
134 $this->errors[] = 'File is not writeable: '.$this->filename;
135 return false;
136 }
137
138 function GenerateRMFchunk(&$chunks) {
139 $oldCONTexists = false;
140 foreach ($chunks as $key => $chunk) {
141 $chunkNameKeys[$chunk['name']] = $key;
142 if ($chunk['name'] == 'CONT') {
143 $oldCONTexists = true;
144 }
145 }
146 $newHeadersCount = $chunks[$chunkNameKeys['.RMF']]['headers_count'] + ($oldCONTexists ? 0 : 1);
147
148 $RMFchunk = "\x00\x00"; // object version
149 $RMFchunk .= getid3_lib::BigEndian2String($chunks[$chunkNameKeys['.RMF']]['file_version'], 4);
150 $RMFchunk .= getid3_lib::BigEndian2String($newHeadersCount, 4);
151
152 $RMFchunk = '.RMF'.getid3_lib::BigEndian2String(strlen($RMFchunk) + 8, 4).$RMFchunk; // .RMF chunk identifier + chunk length
153 return $RMFchunk;
154 }
155
156 function GeneratePROPchunk(&$chunks, &$new_CONT_tag_data) {
157 $old_CONT_length = 0;
158 $old_DATA_offset = 0;
159 $old_INDX_offset = 0;
160 foreach ($chunks as $key => $chunk) {
161 $chunkNameKeys[$chunk['name']] = $key;
162 if ($chunk['name'] == 'CONT') {
163 $old_CONT_length = $chunk['length'];
164 } elseif ($chunk['name'] == 'DATA') {
165 if (!$old_DATA_offset) {
166 $old_DATA_offset = $chunk['offset'];
167 }
168 } elseif ($chunk['name'] == 'INDX') {
169 if (!$old_INDX_offset) {
170 $old_INDX_offset = $chunk['offset'];
171 }
172 }
173 }
174 $CONTdelta = strlen($new_CONT_tag_data) - $old_CONT_length;
175
176 $PROPchunk = "\x00\x00"; // object version
177 $PROPchunk .= getid3_lib::BigEndian2String($chunks[$chunkNameKeys['PROP']]['max_bit_rate'], 4);
178 $PROPchunk .= getid3_lib::BigEndian2String($chunks[$chunkNameKeys['PROP']]['avg_bit_rate'], 4);
179 $PROPchunk .= getid3_lib::BigEndian2String($chunks[$chunkNameKeys['PROP']]['max_packet_size'], 4);
180 $PROPchunk .= getid3_lib::BigEndian2String($chunks[$chunkNameKeys['PROP']]['avg_packet_size'], 4);
181 $PROPchunk .= getid3_lib::BigEndian2String($chunks[$chunkNameKeys['PROP']]['num_packets'], 4);
182 $PROPchunk .= getid3_lib::BigEndian2String($chunks[$chunkNameKeys['PROP']]['duration'], 4);
183 $PROPchunk .= getid3_lib::BigEndian2String($chunks[$chunkNameKeys['PROP']]['preroll'], 4);
184 $PROPchunk .= getid3_lib::BigEndian2String(max(0, $old_INDX_offset + $CONTdelta), 4);
185 $PROPchunk .= getid3_lib::BigEndian2String(max(0, $old_DATA_offset + $CONTdelta), 4);
186 $PROPchunk .= getid3_lib::BigEndian2String($chunks[$chunkNameKeys['PROP']]['num_streams'], 2);
187 $PROPchunk .= getid3_lib::BigEndian2String($chunks[$chunkNameKeys['PROP']]['flags_raw'], 2);
188
189 $PROPchunk = 'PROP'.getid3_lib::BigEndian2String(strlen($PROPchunk) + 8, 4).$PROPchunk; // PROP chunk identifier + chunk length
190 return $PROPchunk;
191 }
192
193 function GenerateCONTchunk() {
194 foreach ($this->tag_data as $key => $value) {
195 // limit each value to 0xFFFF bytes
196 $this->tag_data[$key] = substr($value, 0, 65535);
197 }
198
199 $CONTchunk = "\x00\x00"; // object version
200
201 $CONTchunk .= getid3_lib::BigEndian2String(strlen(@$this->tag_data['title']), 2);
202 $CONTchunk .= @$this->tag_data['title'];
203
204 $CONTchunk .= getid3_lib::BigEndian2String(strlen(@$this->tag_data['artist']), 2);
205 $CONTchunk .= @$this->tag_data['artist'];
206
207 $CONTchunk .= getid3_lib::BigEndian2String(strlen(@$this->tag_data['copyright']), 2);
208 $CONTchunk .= @$this->tag_data['copyright'];
209
210 $CONTchunk .= getid3_lib::BigEndian2String(strlen(@$this->tag_data['comment']), 2);
211 $CONTchunk .= @$this->tag_data['comment'];
212
213 if ($this->paddedlength > (strlen($CONTchunk) + 8)) {
214 $CONTchunk .= str_repeat("\x00", $this->paddedlength - strlen($CONTchunk) - 8);
215 }
216
217 $CONTchunk = 'CONT'.getid3_lib::BigEndian2String(strlen($CONTchunk) + 8, 4).$CONTchunk; // CONT chunk identifier + chunk length
218
219 return $CONTchunk;
220 }
221
222 function RemoveReal() {
223 // File MUST be writeable - CHMOD(646) at least
224 if (is_writeable($this->filename)) {
225 if ($fp_source = @fopen($this->filename, 'r+b')) {
226
227 // Initialize getID3 engine
228 $getID3 = new getID3;
229 $OldThisFileInfo = $getID3->analyze($this->filename);
230 if (empty($OldThisFileInfo['real']['chunks']) && !empty($OldThisFileInfo['real']['old_ra_header'])) {
231 $this->errors[] = 'Cannot remove Real tags from old-style file format';
232 fclose($fp_source);
233 return false;
234 }
235
236 if (empty($OldThisFileInfo['real']['chunks'])) {
237 $this->errors[] = 'Cannot remove Real tags because cannot find DATA chunk in file';
238 fclose($fp_source);
239 return false;
240 }
241 foreach ($OldThisFileInfo['real']['chunks'] as $chunknumber => $chunkarray) {
242 $oldChunkInfo[$chunkarray['name']] = $chunkarray;
243 }
244
245 if (empty($oldChunkInfo['CONT'])) {
246 // no existing CONT chunk
247 fclose($fp_source);
248 return true;
249 }
250
251 $BeforeOffset = $oldChunkInfo['CONT']['offset'];
252 $AfterOffset = $oldChunkInfo['CONT']['offset'] + $oldChunkInfo['CONT']['length'];
253 if ($tempfilename = tempnam('*', 'getID3')) {
254 ob_start();
255 if ($fp_temp = fopen($tempfilename, 'wb')) {
256
257 rewind($fp_source);
258 fwrite($fp_temp, fread($fp_source, $BeforeOffset));
259 fseek($fp_source, $AfterOffset, SEEK_SET);
260 while ($buffer = fread($fp_source, GETID3_FREAD_BUFFER_SIZE)) {
261 fwrite($fp_temp, $buffer, strlen($buffer));
262 }
263 fclose($fp_temp);
264
265 if (copy($tempfilename, $this->filename)) {
266 unlink($tempfilename);
267 fclose($fp_source);
268 return true;
269 }
270 unlink($tempfilename);
271 $this->errors[] = 'FAILED: copy('.$tempfilename.', '.$this->filename.') - '.strip_tags(ob_get_contents());
272
273 } else {
274
275 $this->errors[] = 'Could not open '.$tempfilename.' mode "wb" - '.strip_tags(ob_get_contents());
276
277 }
278 ob_end_clean();
279 }
280 fclose($fp_source);
281 return false;
282
283
284 } else {
285 $this->errors[] = 'Could not open '.$this->filename.' mode "r+b"';
286 return false;
287 }
288 }
289 $this->errors[] = 'File is not writeable: '.$this->filename;
290 return false;
291 }
292
293}
294
295?>
getID3\analyze
analyze($filename)
Definition: getid3.php:168
getid3_lib\BigEndian2String
BigEndian2String($number, $minbytes=1, $synchsafe=false, $signed=false)
Definition: getid3.lib.php:281
getid3_write_real
getID3() by James Heinrich info@getid3.org //
Definition: write.real.php:17
getid3_write_real\GenerateRMFchunk
GenerateRMFchunk(&$chunks)
Definition: write.real.php:138
getid3_write_real\$filename
$filename
Definition: write.real.php:18
getid3_write_real\$errors
$errors
Definition: write.real.php:21
getid3_write_real\getid3_write_real
getid3_write_real()
Definition: write.real.php:24
getid3_write_real\WriteReal
WriteReal()
Definition: write.real.php:28
getid3_write_real\GeneratePROPchunk
GeneratePROPchunk(&$chunks, &$new_CONT_tag_data)
Definition: write.real.php:156
getid3_write_real\$warnings
$warnings
Definition: write.real.php:20
getid3_write_real\GenerateCONTchunk
GenerateCONTchunk()
Definition: write.real.php:193
getid3_write_real\RemoveReal
RemoveReal()
Definition: write.real.php:222
getid3_write_real\$paddedlength
$paddedlength
Definition: write.real.php:22
getid3_write_real\$tag_data
$tag_data
Definition: write.real.php:19
GETID3_FREAD_BUFFER_SIZE
const GETID3_FREAD_BUFFER_SIZE
Definition: getid3.php:14