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comparison e2gallerypro/e2upload/Backend/Assets/getid3/getid3.php @ 3:3f6b44aa6b35 judyates

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[svn r4] added ability to buy stuff, from a Prints page, but it doesn't work well with the css, and it also has not been fitted into the perl make system.
author rlm
date Mon, 22 Feb 2010 08:02:39 -0500
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2:670229c4eb4b 3:3f6b44aa6b35
1 <?php
2 // +----------------------------------------------------------------------+
3 // | PHP version 5 |
4 // +----------------------------------------------------------------------+
5 // | Copyright (c) 2002-2006 James Heinrich, Allan Hansen |
6 // +----------------------------------------------------------------------+
7 // | This source file is subject to version 2 of the GPL license, |
8 // | that is bundled with this package in the file license.txt and is |
9 // | available through the world-wide-web at the following url: |
10 // | http://www.gnu.org/copyleft/gpl.html |
11 // +----------------------------------------------------------------------+
12 // | getID3() - http://getid3.sourceforge.net or http://www.getid3.org |
13 // +----------------------------------------------------------------------+
14 // | Authors: James Heinrich <infogetid3*org> |
15 // | Allan Hansen <ahartemis*dk> |
16 // +----------------------------------------------------------------------+
17 // | getid3.php |
18 // | Main getID3() file. |
19 // | dependencies: modules. |
20 // +----------------------------------------------------------------------+
21 //
22 // $Id: getid3.php,v 1.26 2006/12/25 23:44:23 ah Exp $
23
24
25 class getid3
26 {
27 //// Settings Section - do NOT modify this file - change setting after newing getid3!
28
29 // Encoding
30 public $encoding = 'ISO-8859-1'; // CASE SENSITIVE! - i.e. (must be supported by iconv() - see http://www.gnu.org/software/libiconv/). Examples: ISO-8859-1 UTF-8 UTF-16 UTF-16BE.
31 public $encoding_id3v1 = 'ISO-8859-1'; // Override SPECIFICATION encoding for broken ID3v1 tags caused by bad tag programs. Examples: 'EUC-CN' for "Chinese MP3s" and 'CP1251' for "Cyrillic".
32 public $encoding_id3v2 = 'ISO-8859-1'; // Override ISO-8859-1 encoding for broken ID3v2 tags caused by BRAINDEAD tag programs that writes system codepage as 'ISO-8859-1' instead of UTF-8.
33
34 // Tags - disable for speed
35 public $option_tag_id3v1 = true; // Read and process ID3v1 tags.
36 public $option_tag_id3v2 = true; // Read and process ID3v2 tags.
37 public $option_tag_lyrics3 = true; // Read and process Lyrics3 tags.
38 public $option_tag_apetag = true; // Read and process APE tags.
39
40 // Misc calucations - disable for speed
41 public $option_analyze = true; // Analyze file - disable if you only need to detect file format.
42 public $option_accurate_results = true; // Disable to greatly speed up parsing of some file formats at the cost of accuracy.
43 public $option_tags_process = true; // Copy tags to root key 'tags' and 'comments' and encode to $this->encoding.
44 public $option_tags_images = false; // Scan tags for binary image data - ID3v2 and vorbiscomments only.
45 public $option_extra_info = true; // Calculate/return additional info such as bitrate, channelmode etc.
46 public $option_max_2gb_check = false; // Check whether file is larger than 2 Gb and thus not supported by PHP.
47
48 // Misc data hashes - slow - require hash module
49 public $option_md5_data = false; // Get MD5 sum of data part - slow.
50 public $option_md5_data_source = false; // Use MD5 of source file if available - only FLAC, MAC, OptimFROG and Wavpack4.
51 public $option_sha1_data = false; // Get SHA1 sum of data part - slow.
52
53 // Public variables
54 public $filename; // Filename of file being analysed.
55 public $fp; // Filepointer to file being analysed.
56 public $info; // Result array.
57
58 // Protected variables
59 protected $include_path; // getid3 include path.
60 protected $warnings = array ();
61 protected $iconv_present;
62
63 // Class constants
64 const VERSION = '2.0.0b4';
65 const FREAD_BUFFER_SIZE = 16384; // Read buffer size in bytes.
66 const ICONV_TEST_STRING = ' !"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~ ';
67
68
69
70 // Constructor - check PHP enviroment and load library.
71 public function __construct() {
72
73 // Static varibles - no need to recalc every time we new getid3.
74 static $include_path;
75 static $iconv_present;
76
77
78 static $initialized;
79 if ($initialized) {
80
81 // Import static variables
82 $this->include_path = $include_path;
83 $this->iconv_present = $iconv_present;
84
85 // Run init checks only on first instance.
86 return;
87 }
88
89 // Get include_path
90 $this->include_path = $include_path = dirname(__FILE__) . '/';
91
92 // Check for presence of iconv() and make sure it works (simpel test only).
93 if (function_exists('iconv') && @iconv('UTF-16LE', 'ISO-8859-1', @iconv('ISO-8859-1', 'UTF-16LE', getid3::ICONV_TEST_STRING)) == getid3::ICONV_TEST_STRING) {
94 $this->iconv_present = $iconv_present = true;
95 }
96
97 // iconv() not present - load replacement module.
98 else {
99 $this->include_module('lib.iconv_replacement');
100 $this->iconv_present = $iconv_present = false;
101 }
102
103
104 // Require magic_quotes_runtime off
105 if (get_magic_quotes_runtime()) {
106 throw new getid3_exception('magic_quotes_runtime must be disabled before running getID3(). Surround getid3 block by set_magic_quotes_runtime(0) and set_magic_quotes_runtime(1).');
107 }
108
109
110 // Check memory limit.
111 $memory_limit = ini_get('memory_limit');
112 if (eregi('([0-9]+)M', $memory_limit, $matches)) {
113 // could be stored as "16M" rather than 16777216 for example
114 $memory_limit = $matches[1] * 1048576;
115 }
116 if ($memory_limit <= 0) {
117 // Should not happen.
118 } elseif ($memory_limit <= 4194304) {
119 $this->warning('[SERIOUS] PHP has less than 4 Mb available memory and will very likely run out. Increase memory_limit in php.ini.');
120 } elseif ($memory_limit <= 12582912) {
121 $this->warning('PHP has less than 12 Mb available memory and might run out if all modules are loaded. Increase memory_limit in php.ini if needed.');
122 }
123
124
125 // Check safe_mode off
126 if ((bool)ini_get('safe_mode')) {
127 $this->warning('Safe mode is on, shorten support disabled, md5data/sha1data for ogg vorbis disabled, ogg vorbis/flac tag writing disabled.');
128 }
129
130 $initialized = true;
131 }
132
133
134
135 // Analyze file by name
136 public function Analyze($filename) {
137
138 // Init and save values
139 $this->filename = $filename;
140 $this->warnings = array ();
141
142 // Init result array and set parameters
143 $this->info = array ();
144 $this->info['GETID3_VERSION'] = getid3::VERSION;
145
146 // Remote files not supported
147 if (preg_match('/^(ht|f)tp:\/\//', $filename)) {
148 throw new getid3_exception('Remote files are not supported - please copy the file locally first.');
149 }
150
151 // Open local file
152 if (!$this->fp = @fopen($filename, 'rb')) {
153 throw new getid3_exception('Could not open file "'.$filename.'"');
154 }
155
156 // Set filesize related parameters
157 $this->info['filesize'] = filesize($filename);
158 $this->info['avdataoffset'] = 0;
159 $this->info['avdataend'] = $this->info['filesize'];
160
161 // Option_max_2gb_check
162 if ($this->option_max_2gb_check) {
163 // PHP doesn't support integers larger than 31-bit (~2GB)
164 // filesize() simply returns (filesize % (pow(2, 32)), no matter the actual filesize
165 // ftell() returns 0 if seeking to the end is beyond the range of unsigned integer
166 fseek($this->fp, 0, SEEK_END);
167 if ((($this->info['filesize'] != 0) && (ftell($this->fp) == 0)) ||
168 ($this->info['filesize'] < 0) ||
169 (ftell($this->fp) < 0)) {
170 unset($this->info['filesize']);
171 fclose($this->fp);
172 throw new getid3_exception('File is most likely larger than 2GB and is not supported by PHP.');
173 }
174 }
175
176
177 // ID3v2 detection (NOT parsing) done to make fileformat easier.
178 if (!$this->option_tag_id3v2) {
179
180 fseek($this->fp, 0, SEEK_SET);
181 $header = fread($this->fp, 10);
182 if (substr($header, 0, 3) == 'ID3' && strlen($header) == 10) {
183 $this->info['id3v2']['header'] = true;
184 $this->info['id3v2']['majorversion'] = ord($header{3});
185 $this->info['id3v2']['minorversion'] = ord($header{4});
186 $this->info['avdataoffset'] += getid3_lib::BigEndian2Int(substr($header, 6, 4), 1) + 10; // length of ID3v2 tag in 10-byte header doesn't include 10-byte header length
187 }
188 }
189
190
191 // Handle tags
192 foreach (array ("id3v2", "id3v1", "apetag", "lyrics3") as $tag_name) {
193
194 $option_tag = 'option_tag_' . $tag_name;
195 if ($this->$option_tag) {
196 $this->include_module('tag.'.$tag_name);
197 try {
198 $tag_class = 'getid3_' . $tag_name;
199 $tag = new $tag_class($this);
200 $tag->Analyze();
201 }
202 catch (getid3_exception $e) {
203 throw $e;
204 }
205 }
206 }
207
208
209
210 //// Determine file format by magic bytes in file header.
211
212 // Read 32 kb file data
213 fseek($this->fp, $this->info['avdataoffset'], SEEK_SET);
214 $filedata = fread($this->fp, 32774);
215
216 // Get huge FileFormatArray
217 $file_format_array = getid3::GetFileFormatArray();
218
219 // Identify file format - loop through $format_info and detect with reg expr
220 foreach ($file_format_array as $name => $info) {
221
222 if (preg_match('/'.$info['pattern'].'/s', $filedata)) { // The /s switch on preg_match() forces preg_match() NOT to treat newline (0x0A) characters as special chars but do a binary match
223
224 // Format detected but not supported
225 if (!@$info['module'] || !@$info['group']) {
226 fclose($this->fp);
227 $this->info['fileformat'] = $name;
228 $this->info['mime_type'] = $info['mime_type'];
229 $this->warning('Format only detected. Parsing not available yet.');
230 $this->info['warning'] = $this->warnings;
231 return $this->info;
232 }
233
234 $determined_format = $info; // copy $info deleted by foreach()
235 continue;
236 }
237 }
238
239 // Unable to determine file format
240 if (!@$determined_format) {
241
242 // Too many mp3 encoders on the market put gabage in front of mpeg files
243 // use assume format on these if format detection failed
244 if (preg_match('/\.mp[123a]$/i', $filename)) {
245 $determined_format = $file_format_array['mp3'];
246 }
247
248 else {
249 fclose($this->fp);
250 throw new getid3_exception('Unable to determine file format');
251 }
252 }
253
254 // Free memory
255 unset($file_format_array);
256
257 // Check for illegal ID3 tags
258 if (@$determined_format['fail_id3'] && (@$this->info['id3v1'] || @$this->info['id3v2'])) {
259 if ($determined_format['fail_id3'] === 'ERROR') {
260 fclose($this->fp);
261 throw new getid3_exception('ID3 tags not allowed on this file type.');
262 }
263 elseif ($determined_format['fail_id3'] === 'WARNING') {
264 @$this->info['id3v1'] and $this->warning('ID3v1 tags not allowed on this file type.');
265 @$this->info['id3v2'] and $this->warning('ID3v2 tags not allowed on this file type.');
266 }
267 }
268
269 // Check for illegal APE tags
270 if (@$determined_format['fail_ape'] && @$this->info['tags']['ape']) {
271 if ($determined_format['fail_ape'] === 'ERROR') {
272 fclose($this->fp);
273 throw new getid3_exception('APE tags not allowed on this file type.');
274 } elseif ($determined_format['fail_ape'] === 'WARNING') {
275 $this->warning('APE tags not allowed on this file type.');
276 }
277 }
278
279
280 // Set mime type
281 $this->info['mime_type'] = $determined_format['mime_type'];
282
283 // Calc module file name
284 $determined_format['include'] = 'module.'.$determined_format['group'].'.'.$determined_format['module'].'.php';
285
286 // Supported format signature pattern detected, but module deleted.
287 if (!file_exists($this->include_path.$determined_format['include'])) {
288 fclose($this->fp);
289 throw new getid3_exception('Format not supported, module, '.$determined_format['include'].', was removed.');
290 }
291
292 // Include module
293 $this->include_module($determined_format['group'].'.'.$determined_format['module']);
294
295 // Instantiate module class and analyze
296 $class_name = 'getid3_'.$determined_format['module'];
297 if (!class_exists($class_name)) {
298 throw new getid3_exception('Format not supported, module, '.$determined_format['include'].', is corrupt.');
299 }
300 $class = new $class_name($this);
301
302 try {
303 $this->option_analyze and $class->Analyze();
304 }
305 catch (getid3_exception $e) {
306 throw $e;
307 }
308 catch (Exception $e) {
309 throw new getid3_exception('Corrupt file.');
310 }
311
312 // Close file
313 fclose($this->fp);
314
315 // Optional - Process all tags - copy to 'tags' and convert charsets
316 if ($this->option_tags_process) {
317 $this->HandleAllTags();
318 }
319
320
321 //// Optional - perform more calculations
322 if ($this->option_extra_info) {
323
324 // Set channelmode on audio
325 if (@$this->info['audio']['channels'] == '1') {
326 $this->info['audio']['channelmode'] = 'mono';
327 } elseif (@$this->info['audio']['channels'] == '2') {
328 $this->info['audio']['channelmode'] = 'stereo';
329 }
330
331 // Calculate combined bitrate - audio + video
332 $combined_bitrate = 0;
333 $combined_bitrate += (isset($this->info['audio']['bitrate']) ? $this->info['audio']['bitrate'] : 0);
334 $combined_bitrate += (isset($this->info['video']['bitrate']) ? $this->info['video']['bitrate'] : 0);
335 if (($combined_bitrate > 0) && empty($this->info['bitrate'])) {
336 $this->info['bitrate'] = $combined_bitrate;
337 }
338 if (!isset($this->info['playtime_seconds']) && !empty($this->info['bitrate'])) {
339 $this->info['playtime_seconds'] = (($this->info['avdataend'] - $this->info['avdataoffset']) * 8) / $this->info['bitrate'];
340 }
341
342 // Set playtime string
343 if (!empty($this->info['playtime_seconds']) && empty($this->info['playtime_string'])) {
344 $this->info['playtime_string'] = floor(round($this->info['playtime_seconds']) / 60) . ':' . str_pad(floor(round($this->info['playtime_seconds']) % 60), 2, 0, STR_PAD_LEFT);;
345 }
346
347
348 // CalculateCompressionRatioVideo() {
349 if (@$this->info['video'] && @$this->info['video']['resolution_x'] && @$this->info['video']['resolution_y'] && @$this->info['video']['bits_per_sample']) {
350
351 // From static image formats
352 if (in_array($this->info['video']['dataformat'], array ('bmp', 'gif', 'jpeg', 'jpg', 'png', 'tiff'))) {
353 $frame_rate = 1;
354 $bitrate_compressed = $this->info['filesize'] * 8;
355 }
356
357 // From video formats
358 else {
359 $frame_rate = @$this->info['video']['frame_rate'];
360 $bitrate_compressed = @$this->info['video']['bitrate'];
361 }
362
363 if ($frame_rate && $bitrate_compressed) {
364 $this->info['video']['compression_ratio'] = $bitrate_compressed / ($this->info['video']['resolution_x'] * $this->info['video']['resolution_y'] * $this->info['video']['bits_per_sample'] * $frame_rate);
365 }
366 }
367
368
369 // CalculateCompressionRatioAudio() {
370 if (@$this->info['audio']['bitrate'] && @$this->info['audio']['channels'] && @$this->info['audio']['sample_rate']) {
371 $this->info['audio']['compression_ratio'] = $this->info['audio']['bitrate'] / ($this->info['audio']['channels'] * $this->info['audio']['sample_rate'] * (@$this->info['audio']['bits_per_sample'] ? $this->info['audio']['bits_per_sample'] : 16));
372 }
373
374 if (@$this->info['audio']['streams']) {
375 foreach ($this->info['audio']['streams'] as $stream_number => $stream_data) {
376 if (@$stream_data['bitrate'] && @$stream_data['channels'] && @$stream_data['sample_rate']) {
377 $this->info['audio']['streams'][$stream_number]['compression_ratio'] = $stream_data['bitrate'] / ($stream_data['channels'] * $stream_data['sample_rate'] * (@$stream_data['bits_per_sample'] ? $stream_data['bits_per_sample'] : 16));
378 }
379 }
380 }
381
382
383 // CalculateReplayGain() {
384 if (@$this->info['replay_gain']) {
385 if (!@$this->info['replay_gain']['reference_volume']) {
386 $this->info['replay_gain']['reference_volume'] = 89;
387 }
388 if (isset($this->info['replay_gain']['track']['adjustment'])) {
389 $this->info['replay_gain']['track']['volume'] = $this->info['replay_gain']['reference_volume'] - $this->info['replay_gain']['track']['adjustment'];
390 }
391 if (isset($this->info['replay_gain']['album']['adjustment'])) {
392 $this->info['replay_gain']['album']['volume'] = $this->info['replay_gain']['reference_volume'] - $this->info['replay_gain']['album']['adjustment'];
393 }
394
395 if (isset($this->info['replay_gain']['track']['peak'])) {
396 $this->info['replay_gain']['track']['max_noclip_gain'] = 0 - 20 * log10($this->info['replay_gain']['track']['peak']);
397 }
398 if (isset($this->info['replay_gain']['album']['peak'])) {
399 $this->info['replay_gain']['album']['max_noclip_gain'] = 0 - 20 * log10($this->info['replay_gain']['album']['peak']);
400 }
401 }
402
403
404 // ProcessAudioStreams() {
405 if (@!$this->info['audio']['streams'] && (@$this->info['audio']['bitrate'] || @$this->info['audio']['channels'] || @$this->info['audio']['sample_rate'])) {
406 foreach ($this->info['audio'] as $key => $value) {
407 if ($key != 'streams') {
408 $this->info['audio']['streams'][0][$key] = $value;
409 }
410 }
411 }
412 }
413
414
415 // Get the md5/sha1sum of the audio/video portion of the file - without ID3/APE/Lyrics3/etc header/footer tags.
416 if ($this->option_md5_data || $this->option_sha1_data) {
417
418 // Load data-hash library if needed
419 $this->include_module('lib.data_hash');
420
421 if ($this->option_sha1_data) {
422 new getid3_lib_data_hash($this, 'sha1');
423 }
424
425 if ($this->option_md5_data) {
426
427 // no md5_data_source or option disabled -- md5_data_source supported by FLAC, MAC, OptimFROG, Wavpack4
428 if (!$this->option_md5_data_source || !@$this->info['md5_data_source']) {
429 new getid3_lib_data_hash($this, 'md5');
430 }
431
432 // copy md5_data_source to md5_data if option set to true
433 elseif ($this->option_md5_data_source && @$this->info['md5_data_source']) {
434 $this->info['md5_data'] = $this->info['md5_data_source'];
435 }
436 }
437 }
438
439 // Set warnings
440 if ($this->warnings) {
441 $this->info['warning'] = $this->warnings;
442 }
443
444 // Return result
445 return $this->info;
446 }
447
448
449
450 // Return array of warnings
451 public function warnings() {
452
453 return $this->warnings;
454 }
455
456
457
458 // Add warning(s) to $this->warnings[]
459 public function warning($message) {
460
461 if (is_array($message)) {
462 $this->warnings = array_merge($this->warnings, $message);
463 }
464 else {
465 $this->warnings[] = $message;
466 }
467 }
468
469
470
471 // Clear all warnings when cloning
472 public function __clone() {
473
474 $this->warnings = array ();
475
476 // Copy info array, otherwise it will be a reference.
477 $temp = $this->info;
478 unset($this->info);
479 $this->info = $temp;
480 }
481
482
483
484 // Convert string between charsets -- iconv() wrapper
485 public function iconv($in_charset, $out_charset, $string, $drop01 = false) {
486
487 if ($drop01 && ($string === "\x00" || $string === "\x01")) {
488 return '';
489 }
490
491
492 if (!$this->iconv_present) {
493 return getid3_iconv_replacement::iconv($in_charset, $out_charset, $string);
494 }
495
496
497 // iconv() present
498 if ($result = @iconv($in_charset, $out_charset.'//TRANSLIT', $string)) {
499
500 if ($out_charset == 'ISO-8859-1') {
501 return rtrim($result, "\x00");
502 }
503 return $result;
504 }
505
506 $this->warning('iconv() was unable to convert the string: "' . $string . '" from ' . $in_charset . ' to ' . $out_charset);
507 return $string;
508 }
509
510
511
512 public function include_module($name) {
513
514 if (!file_exists($this->include_path.'module.'.$name.'.php')) {
515 throw new getid3_exception('Required module.'.$name.'.php is missing.');
516 }
517
518 include_once($this->include_path.'module.'.$name.'.php');
519 }
520
521
522
523 public function include_module_optional($name) {
524
525 if (!file_exists($this->include_path.'module.'.$name.'.php')) {
526 return;
527 }
528
529 include_once($this->include_path.'module.'.$name.'.php');
530 return true;
531 }
532
533
534 // Return array containing information about all supported formats
535 public static function GetFileFormatArray() {
536
537 static $format_info = array (
538
539 // Audio formats
540
541 // AC-3 - audio - Dolby AC-3 / Dolby Digital
542 'ac3' => array (
543 'pattern' => '^\x0B\x77',
544 'group' => 'audio',
545 'module' => 'ac3',
546 'mime_type' => 'audio/ac3',
547 ),
548
549 // AAC - audio - Advanced Audio Coding (AAC) - ADIF format
550 'adif' => array (
551 'pattern' => '^ADIF',
552 'group' => 'audio',
553 'module' => 'aac_adif',
554 'mime_type' => 'application/octet-stream',
555 'fail_ape' => 'WARNING',
556 ),
557
558
559 // AAC - audio - Advanced Audio Coding (AAC) - ADTS format (very similar to MP3)
560 'adts' => array (
561 'pattern' => '^\xFF[\xF0-\xF1\xF8-\xF9]',
562 'group' => 'audio',
563 'module' => 'aac_adts',
564 'mime_type' => 'application/octet-stream',
565 'fail_ape' => 'WARNING',
566 ),
567
568
569 // AU - audio - NeXT/Sun AUdio (AU)
570 'au' => array (
571 'pattern' => '^\.snd',
572 'group' => 'audio',
573 'module' => 'au',
574 'mime_type' => 'audio/basic',
575 ),
576
577 // AVR - audio - Audio Visual Research
578 'avr' => array (
579 'pattern' => '^2BIT',
580 'group' => 'audio',
581 'module' => 'avr',
582 'mime_type' => 'application/octet-stream',
583 ),
584
585 // BONK - audio - Bonk v0.9+
586 'bonk' => array (
587 'pattern' => '^\x00(BONK|INFO|META| ID3)',
588 'group' => 'audio',
589 'module' => 'bonk',
590 'mime_type' => 'audio/xmms-bonk',
591 ),
592
593 // DTS - audio - Dolby Theatre System
594 'dts' => array(
595 'pattern' => '^\x7F\xFE\x80\x01',
596 'group' => 'audio',
597 'module' => 'dts',
598 'mime_type' => 'audio/dts',
599 ),
600
601 // FLAC - audio - Free Lossless Audio Codec
602 'flac' => array (
603 'pattern' => '^fLaC',
604 'group' => 'audio',
605 'module' => 'xiph',
606 'mime_type' => 'audio/x-flac',
607 ),
608
609 // LA - audio - Lossless Audio (LA)
610 'la' => array (
611 'pattern' => '^LA0[2-4]',
612 'group' => 'audio',
613 'module' => 'la',
614 'mime_type' => 'application/octet-stream',
615 ),
616
617 // LPAC - audio - Lossless Predictive Audio Compression (LPAC)
618 'lpac' => array (
619 'pattern' => '^LPAC',
620 'group' => 'audio',
621 'module' => 'lpac',
622 'mime_type' => 'application/octet-stream',
623 ),
624
625 // MIDI - audio - MIDI (Musical Instrument Digital Interface)
626 'midi' => array (
627 'pattern' => '^MThd',
628 'group' => 'audio',
629 'module' => 'midi',
630 'mime_type' => 'audio/midi',
631 ),
632
633 // MAC - audio - Monkey's Audio Compressor
634 'mac' => array (
635 'pattern' => '^MAC ',
636 'group' => 'audio',
637 'module' => 'monkey',
638 'mime_type' => 'application/octet-stream',
639 ),
640
641 // MOD - audio - MODule (assorted sub-formats)
642 'mod' => array (
643 'pattern' => '^.{1080}(M.K.|[5-9]CHN|[1-3][0-9]CH)',
644 'mime_type' => 'audio/mod',
645 ),
646
647 // MOD - audio - MODule (Impulse Tracker)
648 'it' => array (
649 'pattern' => '^IMPM',
650 'mime_type' => 'audio/it',
651 ),
652
653 // MOD - audio - MODule (eXtended Module, various sub-formats)
654 'xm' => array (
655 'pattern' => '^Extended Module',
656 'mime_type' => 'audio/xm',
657 ),
658
659 // MOD - audio - MODule (ScreamTracker)
660 's3m' => array (
661 'pattern' => '^.{44}SCRM',
662 'mime_type' => 'audio/s3m',
663 ),
664
665 // MPC - audio - Musepack / MPEGplus SV7+
666 'mpc' => array (
667 'pattern' => '^(MP\+)',
668 'group' => 'audio',
669 'module' => 'mpc',
670 'mime_type' => 'audio/x-musepack',
671 ),
672
673 // MPC - audio - Musepack / MPEGplus SV4-6
674 'mpc_old' => array (
675 'pattern' => '^([\x00\x01\x10\x11\x40\x41\x50\x51\x80\x81\x90\x91\xC0\xC1\xD0\xD1][\x20-37][\x00\x20\x40\x60\x80\xA0\xC0\xE0])',
676 'group' => 'audio',
677 'module' => 'mpc_old',
678 'mime_type' => 'application/octet-stream',
679 ),
680
681
682 // MP3 - audio - MPEG-audio Layer 3 (very similar to AAC-ADTS)
683 'mp3' => array (
684 'pattern' => '^\xFF[\xE2-\xE7\xF2-\xF7\xFA-\xFF][\x00-\xEB]',
685 'group' => 'audio',
686 'module' => 'mp3',
687 'mime_type' => 'audio/mpeg',
688 ),
689
690 // OFR - audio - OptimFROG
691 'ofr' => array (
692 'pattern' => '^(\*RIFF|OFR)',
693 'group' => 'audio',
694 'module' => 'optimfrog',
695 'mime_type' => 'application/octet-stream',
696 ),
697
698 // RKAU - audio - RKive AUdio compressor
699 'rkau' => array (
700 'pattern' => '^RKA',
701 'group' => 'audio',
702 'module' => 'rkau',
703 'mime_type' => 'application/octet-stream',
704 ),
705
706 // SHN - audio - Shorten
707 'shn' => array (
708 'pattern' => '^ajkg',
709 'group' => 'audio',
710 'module' => 'shorten',
711 'mime_type' => 'audio/xmms-shn',
712 'fail_id3' => 'ERROR',
713 'fail_ape' => 'ERROR',
714 ),
715
716 // TTA - audio - TTA Lossless Audio Compressor (http://tta.corecodec.org)
717 'tta' => array (
718 'pattern' => '^TTA', // could also be '^TTA(\x01|\x02|\x03|2|1)'
719 'group' => 'audio',
720 'module' => 'tta',
721 'mime_type' => 'application/octet-stream',
722 ),
723
724 // VOC - audio - Creative Voice (VOC)
725 'voc' => array (
726 'pattern' => '^Creative Voice File',
727 'group' => 'audio',
728 'module' => 'voc',
729 'mime_type' => 'audio/voc',
730 ),
731
732 // VQF - audio - transform-domain weighted interleave Vector Quantization Format (VQF)
733 'vqf' => array (
734 'pattern' => '^TWIN',
735 'group' => 'audio',
736 'module' => 'vqf',
737 'mime_type' => 'application/octet-stream',
738 ),
739
740 // WV - audio - WavPack (v4.0+)
741 'vw' => array(
742 'pattern' => '^wvpk',
743 'group' => 'audio',
744 'module' => 'wavpack',
745 'mime_type' => 'application/octet-stream',
746 ),
747
748
749 // Audio-Video formats
750
751 // ASF - audio/video - Advanced Streaming Format, Windows Media Video, Windows Media Audio
752 'asf' => array (
753 'pattern' => '^\x30\x26\xB2\x75\x8E\x66\xCF\x11\xA6\xD9\x00\xAA\x00\x62\xCE\x6C',
754 'group' => 'audio-video',
755 'module' => 'asf',
756 'mime_type' => 'video/x-ms-asf',
757 ),
758
759 // BINK - audio/video - Bink / Smacker
760 'bink' => array(
761 'pattern' => '^(BIK|SMK)',
762 'mime_type' => 'application/octet-stream',
763 ),
764
765 // FLV - audio/video - FLash Video
766 'flv' => array(
767 'pattern' => '^FLV\x01',
768 'group' => 'audio-video',
769 'module' => 'flv',
770 'mime_type' => 'video/x-flv',
771 ),
772
773 // MKAV - audio/video - Mastroka
774 'matroska' => array (
775 'pattern' => '^\x1A\x45\xDF\xA3',
776 'mime_type' => 'application/octet-stream',
777 ),
778
779 // MPEG - audio/video - MPEG (Moving Pictures Experts Group)
780 'mpeg' => array (
781 'pattern' => '^\x00\x00\x01(\xBA|\xB3)',
782 'group' => 'audio-video',
783 'module' => 'mpeg',
784 'mime_type' => 'video/mpeg',
785 ),
786
787 // NSV - audio/video - Nullsoft Streaming Video (NSV)
788 'nsv' => array (
789 'pattern' => '^NSV[sf]',
790 'group' => 'audio-video',
791 'module' => 'nsv',
792 'mime_type' => 'application/octet-stream',
793 ),
794
795 // Ogg - audio/video - Ogg (Ogg Vorbis, OggFLAC, Speex, Ogg Theora(*), Ogg Tarkin(*))
796 'ogg' => array (
797 'pattern' => '^OggS',
798 'group' => 'audio',
799 'module' => 'xiph',
800 'mime_type' => 'application/ogg',
801 'fail_id3' => 'WARNING',
802 'fail_ape' => 'WARNING',
803 ),
804
805 // QT - audio/video - Quicktime
806 'quicktime' => array (
807 'pattern' => '^.{4}(cmov|free|ftyp|mdat|moov|pnot|skip|wide)',
808 'group' => 'audio-video',
809 'module' => 'quicktime',
810 'mime_type' => 'video/quicktime',
811 ),
812
813 // RIFF - audio/video - Resource Interchange File Format (RIFF) / WAV / AVI / CD-audio / SDSS = renamed variant used by SmartSound QuickTracks (www.smartsound.com) / FORM = Audio Interchange File Format (AIFF)
814 'riff' => array (
815 'pattern' => '^(RIFF|SDSS|FORM)',
816 'group' => 'audio-video',
817 'module' => 'riff',
818 'mime_type' => 'audio/x-wave',
819 'fail_ape' => 'WARNING',
820 ),
821
822 // Real - audio/video - RealAudio, RealVideo
823 'real' => array (
824 'pattern' => '^(\.RMF|.ra)',
825 'group' => 'audio-video',
826 'module' => 'real',
827 'mime_type' => 'audio/x-realaudio',
828 ),
829
830 // SWF - audio/video - ShockWave Flash
831 'swf' => array (
832 'pattern' => '^(F|C)WS',
833 'group' => 'audio-video',
834 'module' => 'swf',
835 'mime_type' => 'application/x-shockwave-flash',
836 ),
837
838
839 // Still-Image formats
840
841 // BMP - still image - Bitmap (Windows, OS/2; uncompressed, RLE8, RLE4)
842 'bmp' => array (
843 'pattern' => '^BM',
844 'group' => 'graphic',
845 'module' => 'bmp',
846 'mime_type' => 'image/bmp',
847 'fail_id3' => 'ERROR',
848 'fail_ape' => 'ERROR',
849 ),
850
851 // GIF - still image - Graphics Interchange Format
852 'gif' => array (
853 'pattern' => '^GIF',
854 'group' => 'graphic',
855 'module' => 'gif',
856 'mime_type' => 'image/gif',
857 'fail_id3' => 'ERROR',
858 'fail_ape' => 'ERROR',
859 ),
860
861 // JPEG - still image - Joint Photographic Experts Group (JPEG)
862 'jpeg' => array (
863 'pattern' => '^\xFF\xD8\xFF',
864 'group' => 'graphic',
865 'module' => 'jpeg',
866 'mime_type' => 'image/jpeg',
867 'fail_id3' => 'ERROR',
868 'fail_ape' => 'ERROR',
869 ),
870
871 // PCD - still image - Kodak Photo CD
872 'pcd' => array (
873 'pattern' => '^.{2048}PCD_IPI\x00',
874 'group' => 'graphic',
875 'module' => 'pcd',
876 'mime_type' => 'image/x-photo-cd',
877 'fail_id3' => 'ERROR',
878 'fail_ape' => 'ERROR',
879 ),
880
881
882 // PNG - still image - Portable Network Graphics (PNG)
883 'png' => array (
884 'pattern' => '^\x89\x50\x4E\x47\x0D\x0A\x1A\x0A',
885 'group' => 'graphic',
886 'module' => 'png',
887 'mime_type' => 'image/png',
888 'fail_id3' => 'ERROR',
889 'fail_ape' => 'ERROR',
890 ),
891
892
893 // SVG - still image - Scalable Vector Graphics (SVG)
894 'svg' => array(
895 'pattern' => '<!DOCTYPE svg PUBLIC ',
896 'mime_type' => 'image/svg+xml',
897 'fail_id3' => 'ERROR',
898 'fail_ape' => 'ERROR',
899 ),
900
901
902 // TIFF - still image - Tagged Information File Format (TIFF)
903 'tiff' => array (
904 'pattern' => '^(II\x2A\x00|MM\x00\x2A)',
905 'group' => 'graphic',
906 'module' => 'tiff',
907 'mime_type' => 'image/tiff',
908 'fail_id3' => 'ERROR',
909 'fail_ape' => 'ERROR',
910 ),
911
912
913 // Data formats
914
915 'exe' => array(
916 'pattern' => '^MZ',
917 'mime_type' => 'application/octet-stream',
918 'fail_id3' => 'ERROR',
919 'fail_ape' => 'ERROR',
920 ),
921
922 // ISO - data - International Standards Organization (ISO) CD-ROM Image
923 'iso' => array (
924 'pattern' => '^.{32769}CD001',
925 'group' => 'misc',
926 'module' => 'iso',
927 'mime_type' => 'application/octet-stream',
928 'fail_id3' => 'ERROR',
929 'fail_ape' => 'ERROR',
930 ),
931
932 // RAR - data - RAR compressed data
933 'rar' => array(
934 'pattern' => '^Rar\!',
935 'mime_type' => 'application/octet-stream',
936 'fail_id3' => 'ERROR',
937 'fail_ape' => 'ERROR',
938 ),
939
940 // SZIP - audio - SZIP compressed data
941 'szip' => array (
942 'pattern' => '^SZ\x0A\x04',
943 'group' => 'archive',
944 'module' => 'szip',
945 'mime_type' => 'application/octet-stream',
946 'fail_id3' => 'ERROR',
947 'fail_ape' => 'ERROR',
948 ),
949
950 // TAR - data - TAR compressed data
951 'tar' => array(
952 'pattern' => '^.{100}[0-9\x20]{7}\x00[0-9\x20]{7}\x00[0-9\x20]{7}\x00[0-9\x20\x00]{12}[0-9\x20\x00]{12}',
953 'group' => 'archive',
954 'module' => 'tar',
955 'mime_type' => 'application/x-tar',
956 'fail_id3' => 'ERROR',
957 'fail_ape' => 'ERROR',
958 ),
959
960 // GZIP - data - GZIP compressed data
961 'gz' => array(
962 'pattern' => '^\x1F\x8B\x08',
963 'group' => 'archive',
964 'module' => 'gzip',
965 'mime_type' => 'application/x-gzip',
966 'fail_id3' => 'ERROR',
967 'fail_ape' => 'ERROR',
968 ),
969
970
971 // ZIP - data - ZIP compressed data
972 'zip' => array (
973 'pattern' => '^PK\x03\x04',
974 'group' => 'archive',
975 'module' => 'zip',
976 'mime_type' => 'application/zip',
977 'fail_id3' => 'ERROR',
978 'fail_ape' => 'ERROR',
979 ),
980
981
982 // PAR2 - data - Parity Volume Set Specification 2.0
983 'par2' => array (
984 'pattern' => '^PAR2\x00PKT',
985 'mime_type' => 'application/octet-stream',
986 'fail_id3' => 'ERROR',
987 'fail_ape' => 'ERROR',
988 ),
989
990
991 // PDF - data - Portable Document Format
992 'pdf' => array(
993 'pattern' => '^\x25PDF',
994 'mime_type' => 'application/pdf',
995 'fail_id3' => 'ERROR',
996 'fail_ape' => 'ERROR',
997 ),
998
999 // DOC - data - Microsoft Word
1000 'msoffice' => array(
1001 'pattern' => '^\xD0\xCF\x11\xE0', // D0CF11E == DOCFILE == Microsoft Office Document
1002 'mime_type' => 'application/octet-stream',
1003 'fail_id3' => 'ERROR',
1004 'fail_ape' => 'ERROR',
1005 ),
1006 );
1007
1008 return $format_info;
1009 }
1010
1011
1012
1013 // Recursive over array - converts array to $encoding charset from $this->encoding
1014 function CharConvert(&$array, $encoding) {
1015
1016 // Identical encoding - end here
1017 if ($encoding == $this->encoding) {
1018 return;
1019 }
1020
1021 // Loop thru array
1022 foreach ($array as $key => $value) {
1023
1024 // Go recursive
1025 if (is_array($value)) {
1026 $this->CharConvert($array[$key], $encoding);
1027 }
1028
1029 // Convert string
1030 elseif (is_string($value)) {
1031 $array[$key] = $this->iconv($encoding, $this->encoding, $value);
1032 }
1033 }
1034 }
1035
1036
1037
1038 // Convert and copy tags
1039 protected function HandleAllTags() {
1040
1041 // Key name => array (tag name, character encoding)
1042 static $tags = array (
1043 'asf' => array ('asf', 'UTF-16LE'),
1044 'midi' => array ('midi', 'ISO-8859-1'),
1045 'nsv' => array ('nsv', 'ISO-8859-1'),
1046 'ogg' => array ('vorbiscomment', 'UTF-8'),
1047 'png' => array ('png', 'UTF-8'),
1048 'tiff' => array ('tiff', 'ISO-8859-1'),
1049 'quicktime' => array ('quicktime', 'ISO-8859-1'),
1050 'real' => array ('real', 'ISO-8859-1'),
1051 'vqf' => array ('vqf', 'ISO-8859-1'),
1052 'zip' => array ('zip', 'ISO-8859-1'),
1053 'riff' => array ('riff', 'ISO-8859-1'),
1054 'lyrics3' => array ('lyrics3', 'ISO-8859-1'),
1055 'id3v1' => array ('id3v1', ''), // change below - cannot assign variable to static array
1056 'id3v2' => array ('id3v2', 'UTF-8'), // module converts all frames to UTF-8
1057 'ape' => array ('ape', 'UTF-8')
1058 );
1059 $tags['id3v1'][1] = $this->encoding_id3v1;
1060
1061 // Loop thru tags array
1062 foreach ($tags as $comment_name => $tag_name_encoding_array) {
1063 list($tag_name, $encoding) = $tag_name_encoding_array;
1064
1065 // Fill in default encoding type if not already present
1066 @$this->info[$comment_name] and $this->info[$comment_name]['encoding'] = $encoding;
1067
1068 // Copy comments if key name set
1069 if (@$this->info[$comment_name]['comments']) {
1070
1071 foreach ($this->info[$comment_name]['comments'] as $tag_key => $value_array) {
1072 foreach ($value_array as $key => $value) {
1073 if (strlen(trim($value)) > 0) {
1074 $this->info['tags'][$tag_name][trim($tag_key)][] = $value; // do not trim!! Unicode characters will get mangled if trailing nulls are removed!
1075 }
1076 }
1077
1078 }
1079
1080 if (!@$this->info['tags'][$tag_name]) {
1081 // comments are set but contain nothing but empty strings, so skip
1082 continue;
1083 }
1084
1085 $this->CharConvert($this->info['tags'][$tag_name], $encoding);
1086 }
1087 }
1088
1089
1090 // Merge comments from ['tags'] into common ['comments']
1091 if (@$this->info['tags']) {
1092
1093 foreach ($this->info['tags'] as $tag_type => $tag_array) {
1094
1095 foreach ($tag_array as $tag_name => $tagdata) {
1096
1097 foreach ($tagdata as $key => $value) {
1098
1099 if (!empty($value)) {
1100
1101 if (empty($this->info['comments'][$tag_name])) {
1102
1103 // fall through and append value
1104 }
1105 elseif ($tag_type == 'id3v1') {
1106
1107 $new_value_length = strlen(trim($value));
1108 foreach ($this->info['comments'][$tag_name] as $existing_key => $existing_value) {
1109 $old_value_length = strlen(trim($existing_value));
1110 if (($new_value_length <= $old_value_length) && (substr($existing_value, 0, $new_value_length) == trim($value))) {
1111 // new value is identical but shorter-than (or equal-length to) one already in comments - skip
1112 break 2;
1113 }
1114 }
1115 }
1116 else {
1117
1118 $new_value_length = strlen(trim($value));
1119 foreach ($this->info['comments'][$tag_name] as $existing_key => $existing_value) {
1120 $old_value_length = strlen(trim($existing_value));
1121 if (($new_value_length > $old_value_length) && (substr(trim($value), 0, strlen($existing_value)) == $existing_value)) {
1122 $this->info['comments'][$tag_name][$existing_key] = trim($value);
1123 break 2;
1124 }
1125 }
1126 }
1127
1128 if (empty($this->info['comments'][$tag_name]) || !in_array(trim($value), $this->info['comments'][$tag_name])) {
1129 $this->info['comments'][$tag_name][] = trim($value);
1130 }
1131 }
1132 }
1133 }
1134 }
1135 }
1136
1137 return true;
1138 }
1139 }
1140
1141
1142 abstract class getid3_handler
1143 {
1144
1145 protected $getid3; // pointer
1146
1147 protected $data_string_flag = false; // analyzing filepointer or string
1148 protected $data_string; // string to analyze
1149 protected $data_string_position = 0; // seek position in string
1150
1151
1152 public function __construct(getID3 $getid3) {
1153
1154 $this->getid3 = $getid3;
1155 }
1156
1157
1158 // Analyze from file pointer
1159 abstract public function Analyze();
1160
1161
1162
1163 // Analyze from string instead
1164 public function AnalyzeString(&$string) {
1165
1166 // Enter string mode
1167 $this->data_string_flag = true;
1168 $this->data_string = $string;
1169
1170 // Save info
1171 $saved_avdataoffset = $this->getid3->info['avdataoffset'];
1172 $saved_avdataend = $this->getid3->info['avdataend'];
1173 $saved_filesize = $this->getid3->info['filesize'];
1174
1175 // Reset some info
1176 $this->getid3->info['avdataoffset'] = 0;
1177 $this->getid3->info['avdataend'] = $this->getid3->info['filesize'] = strlen($string);
1178
1179 // Analyze
1180 $this->Analyze();
1181
1182 // Restore some info
1183 $this->getid3->info['avdataoffset'] = $saved_avdataoffset;
1184 $this->getid3->info['avdataend'] = $saved_avdataend;
1185 $this->getid3->info['filesize'] = $saved_filesize;
1186
1187 // Exit string mode
1188 $this->data_string_flag = false;
1189 }
1190
1191
1192 protected function ftell() {
1193
1194 if ($this->data_string_flag) {
1195 return $this->data_string_position;
1196 }
1197 return ftell($this->getid3->fp);
1198 }
1199
1200
1201 protected function fread($bytes) {
1202
1203 if ($this->data_string_flag) {
1204 $this->data_string_position += $bytes;
1205 return substr($this->data_string, $this->data_string_position - $bytes, $bytes);
1206 }
1207 return fread($this->getid3->fp, $bytes);
1208 }
1209
1210
1211 protected function fseek($bytes, $whence = SEEK_SET) {
1212
1213 if ($this->data_string_flag) {
1214 switch ($whence) {
1215 case SEEK_SET:
1216 $this->data_string_position = $bytes;
1217 return;
1218
1219 case SEEK_CUR:
1220 $this->data_string_position += $bytes;
1221 return;
1222
1223 case SEEK_END:
1224 $this->data_string_position = strlen($this->data_string) + $bytes;
1225 return;
1226 }
1227 }
1228 return fseek($this->getid3->fp, $bytes, $whence);
1229 }
1230
1231 }
1232
1233
1234
1235
1236 abstract class getid3_handler_write
1237 {
1238 protected $filename;
1239 protected $user_abort;
1240
1241 private $fp_lock;
1242 private $owner;
1243 private $group;
1244 private $perms;
1245
1246
1247 public function __construct($filename) {
1248
1249 if (!file_exists($filename)) {
1250 throw new getid3_exception('File does not exist: "' . $filename . '"');
1251 }
1252
1253 if (!is_writeable($filename)) {
1254 throw new getid3_exception('File is not writeable: "' . $filename . '"');
1255 }
1256
1257 if (!is_writeable(dirname($filename))) {
1258 throw new getid3_exception('Directory is not writeable: ' . dirname($filename) . ' (need to write lock file).');
1259 }
1260
1261 $this->user_abort = ignore_user_abort(true);
1262
1263 $this->fp_lock = fopen($filename . '.getid3.lock', 'w');
1264 flock($this->fp_lock, LOCK_EX);
1265
1266 $this->filename = $filename;
1267 }
1268
1269
1270 public function __destruct() {
1271
1272 flock($this->fp_lock, LOCK_UN);
1273 fclose($this->fp_lock);
1274 unlink($this->filename . '.getid3.lock');
1275
1276 ignore_user_abort($this->user_abort);
1277 }
1278
1279
1280 protected function save_permissions() {
1281
1282 $this->owner = fileowner($this->filename);
1283 $this->group = filegroup($this->filename);
1284 $this->perms = fileperms($this->filename);
1285 }
1286
1287
1288 protected function restore_permissions() {
1289
1290 @chown($this->filename, $this->owner);
1291 @chgrp($this->filename, $this->group);
1292 @chmod($this->filename, $this->perms);
1293 }
1294
1295
1296 abstract public function read();
1297
1298 abstract public function write();
1299
1300 abstract public function remove();
1301
1302 }
1303
1304
1305
1306
1307 class getid3_exception extends Exception
1308 {
1309 public $message;
1310
1311 }
1312
1313
1314
1315
1316 class getid3_lib
1317 {
1318
1319 // Convert Little Endian byte string to int - max 32 bits
1320 public static function LittleEndian2Int($byte_word, $signed = false) {
1321
1322 return getid3_lib::BigEndian2Int(strrev($byte_word), $signed);
1323 }
1324
1325
1326
1327 // Convert number to Little Endian byte string
1328 public static function LittleEndian2String($number, $minbytes=1, $synchsafe=false) {
1329 $intstring = '';
1330 while ($number > 0) {
1331 if ($synchsafe) {
1332 $intstring = $intstring.chr($number & 127);
1333 $number >>= 7;
1334 } else {
1335 $intstring = $intstring.chr($number & 255);
1336 $number >>= 8;
1337 }
1338 }
1339 return str_pad($intstring, $minbytes, "\x00", STR_PAD_RIGHT);
1340 }
1341
1342
1343
1344 // Convert Big Endian byte string to int - max 32 bits
1345 public static function BigEndian2Int($byte_word, $signed = false) {
1346
1347 $int_value = 0;
1348 $byte_wordlen = strlen($byte_word);
1349
1350 for ($i = 0; $i < $byte_wordlen; $i++) {
1351 $int_value += ord($byte_word{$i}) * pow(256, ($byte_wordlen - 1 - $i));
1352 }
1353
1354 if ($signed) {
1355 $sign_mask_bit = 0x80 << (8 * ($byte_wordlen - 1));
1356 if ($int_value & $sign_mask_bit) {
1357 $int_value = 0 - ($int_value & ($sign_mask_bit - 1));
1358 }
1359 }
1360
1361 return $int_value;
1362 }
1363
1364
1365
1366 // Convert Big Endian byte sybc safe string to int - max 32 bits
1367 public static function BigEndianSyncSafe2Int($byte_word) {
1368
1369 $int_value = 0;
1370 $byte_wordlen = strlen($byte_word);
1371
1372 // disregard MSB, effectively 7-bit bytes
1373 for ($i = 0; $i < $byte_wordlen; $i++) {
1374 $int_value = $int_value | (ord($byte_word{$i}) & 0x7F) << (($byte_wordlen - 1 - $i) * 7);
1375 }
1376 return $int_value;
1377 }
1378
1379
1380
1381 // Convert Big Endian byte string to bit string
1382 public static function BigEndian2Bin($byte_word) {
1383
1384 $bin_value = '';
1385 $byte_wordlen = strlen($byte_word);
1386 for ($i = 0; $i < $byte_wordlen; $i++) {
1387 $bin_value .= str_pad(decbin(ord($byte_word{$i})), 8, '0', STR_PAD_LEFT);
1388 }
1389 return $bin_value;
1390 }
1391
1392
1393
1394 public static function BigEndian2Float($byte_word) {
1395
1396 // ANSI/IEEE Standard 754-1985, Standard for Binary Floating Point Arithmetic
1397 // http://www.psc.edu/general/software/packages/ieee/ieee.html
1398 // http://www.scri.fsu.edu/~jac/MAD3401/Backgrnd/ieee.html
1399
1400 $bit_word = getid3_lib::BigEndian2Bin($byte_word);
1401 if (!$bit_word) {
1402 return 0;
1403 }
1404 $sign_bit = $bit_word{0};
1405
1406 switch (strlen($byte_word) * 8) {
1407 case 32:
1408 $exponent_bits = 8;
1409 $fraction_bits = 23;
1410 break;
1411
1412 case 64:
1413 $exponent_bits = 11;
1414 $fraction_bits = 52;
1415 break;
1416
1417 case 80:
1418 // 80-bit Apple SANE format
1419 // http://www.mactech.com/articles/mactech/Vol.06/06.01/SANENormalized/
1420 $exponent_string = substr($bit_word, 1, 15);
1421 $is_normalized = intval($bit_word{16});
1422 $fraction_string = substr($bit_word, 17, 63);
1423 $exponent = pow(2, getid3_lib::Bin2Dec($exponent_string) - 16383);
1424 $fraction = $is_normalized + getid3_lib::DecimalBinary2Float($fraction_string);
1425 $float_value = $exponent * $fraction;
1426 if ($sign_bit == '1') {
1427 $float_value *= -1;
1428 }
1429 return $float_value;
1430 break;
1431
1432 default:
1433 return false;
1434 break;
1435 }
1436 $exponent_string = substr($bit_word, 1, $exponent_bits);
1437 $fraction_string = substr($bit_word, $exponent_bits + 1, $fraction_bits);
1438 $exponent = bindec($exponent_string);
1439 $fraction = bindec($fraction_string);
1440
1441 if (($exponent == (pow(2, $exponent_bits) - 1)) && ($fraction != 0)) {
1442 // Not a Number
1443 $float_value = false;
1444 } elseif (($exponent == (pow(2, $exponent_bits) - 1)) && ($fraction == 0)) {
1445 if ($sign_bit == '1') {
1446 $float_value = '-infinity';
1447 } else {
1448 $float_value = '+infinity';
1449 }
1450 } elseif (($exponent == 0) && ($fraction == 0)) {
1451 if ($sign_bit == '1') {
1452 $float_value = -0;
1453 } else {
1454 $float_value = 0;
1455 }
1456 $float_value = ($sign_bit ? 0 : -0);
1457 } elseif (($exponent == 0) && ($fraction != 0)) {
1458 // These are 'unnormalized' values
1459 $float_value = pow(2, (-1 * (pow(2, $exponent_bits - 1) - 2))) * getid3_lib::DecimalBinary2Float($fraction_string);
1460 if ($sign_bit == '1') {
1461 $float_value *= -1;
1462 }
1463 } elseif ($exponent != 0) {
1464 $float_value = pow(2, ($exponent - (pow(2, $exponent_bits - 1) - 1))) * (1 + getid3_lib::DecimalBinary2Float($fraction_string));
1465 if ($sign_bit == '1') {
1466 $float_value *= -1;
1467 }
1468 }
1469 return (float) $float_value;
1470 }
1471
1472
1473
1474 public static function LittleEndian2Float($byte_word) {
1475
1476 return getid3_lib::BigEndian2Float(strrev($byte_word));
1477 }
1478
1479
1480
1481 public static function DecimalBinary2Float($binary_numerator) {
1482 $numerator = bindec($binary_numerator);
1483 $denominator = bindec('1'.str_repeat('0', strlen($binary_numerator)));
1484 return ($numerator / $denominator);
1485 }
1486
1487
1488 public static function PrintHexBytes($string, $hex=true, $spaces=true, $html_safe=true) {
1489
1490 $return_string = '';
1491 for ($i = 0; $i < strlen($string); $i++) {
1492 if ($hex) {
1493 $return_string .= str_pad(dechex(ord($string{$i})), 2, '0', STR_PAD_LEFT);
1494 } else {
1495 $return_string .= ' '.(ereg("[\x20-\x7E]", $string{$i}) ? $string{$i} : '');
1496 }
1497 if ($spaces) {
1498 $return_string .= ' ';
1499 }
1500 }
1501 if ($html_safe) {
1502 $return_string = htmlentities($return_string);
1503 }
1504 return $return_string;
1505 }
1506
1507
1508
1509 // Process header data string - read several values with algorithm and add to target
1510 // algorithm is one one the getid3_lib::Something2Something() function names
1511 // parts_array is index => length - $target[index] = algorithm(substring(data))
1512 // - OR just substring(data) if length is negative!
1513 // indexes == 'IGNORE**' are ignored
1514
1515 public static function ReadSequence($algorithm, &$target, &$data, $offset, $parts_array) {
1516
1517 // Loop thru $parts_array
1518 foreach ($parts_array as $target_string => $length) {
1519
1520 // Add to target
1521 if (!strstr($target_string, 'IGNORE')) {
1522
1523 // substr(....length)
1524 if ($length < 0) {
1525 $target[$target_string] = substr($data, $offset, -$length);
1526 }
1527
1528 // algorithm(substr(...length))
1529 else {
1530 $target[$target_string] = getid3_lib::$algorithm(substr($data, $offset, $length));
1531 }
1532 }
1533
1534 // Move pointer
1535 $offset += abs($length);
1536 }
1537 }
1538
1539 }
1540
1541
1542
1543 class getid3_lib_replaygain
1544 {
1545
1546 public static function NameLookup($name_code) {
1547
1548 static $lookup = array (
1549 0 => 'not set',
1550 1 => 'Track Gain Adjustment',
1551 2 => 'Album Gain Adjustment'
1552 );
1553
1554 return @$lookup[$name_code];
1555 }
1556
1557
1558
1559 public static function OriginatorLookup($originator_code) {
1560
1561 static $lookup = array (
1562 0 => 'unspecified',
1563 1 => 'pre-set by artist/producer/mastering engineer',
1564 2 => 'set by user',
1565 3 => 'determined automatically'
1566 );
1567
1568 return @$lookup[$originator_code];
1569 }
1570
1571
1572
1573 public static function AdjustmentLookup($raw_adjustment, $sign_bit) {
1574
1575 return (float)$raw_adjustment / 10 * ($sign_bit == 1 ? -1 : 1);
1576 }
1577
1578
1579
1580 public static function GainString($name_code, $originator_code, $replaygain) {
1581
1582 $sign_bit = $replaygain < 0 ? 1 : 0;
1583
1584 $stored_replaygain = intval(round($replaygain * 10));
1585 $gain_string = str_pad(decbin($name_code), 3, '0', STR_PAD_LEFT);
1586 $gain_string .= str_pad(decbin($originator_code), 3, '0', STR_PAD_LEFT);
1587 $gain_string .= $sign_bit;
1588 $gain_string .= str_pad(decbin($stored_replaygain), 9, '0', STR_PAD_LEFT);
1589
1590 return $gain_string;
1591 }
1592
1593 }
1594
1595
1596
1597
1598 ?>