Mercurial > judyates
view e2gallerypro/e2upload/Backend/Assets/getid3/getid3.php @ 20:1038db2374ec judyates
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| author | Robert McIntyre <rlm@mit.edu> |
|---|---|
| date | Sun, 08 Sep 2013 00:47:09 -0400 |
| parents | 3f6b44aa6b35 |
| children |
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1 <?php2 // +----------------------------------------------------------------------+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 $25 class getid326 {27 //// Settings Section - do NOT modify this file - change setting after newing getid3!29 // Encoding30 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-8.34 // Tags - disable for speed35 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.40 // Misc calucations - disable for speed41 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.48 // Misc data hashes - slow - require hash module49 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.53 // Public variables54 public $filename; // Filename of file being analysed.55 public $fp; // Filepointer to file being analysed.56 public $info; // Result array.58 // Protected variables59 protected $include_path; // getid3 include path.60 protected $warnings = array ();61 protected $iconv_present;63 // Class constants64 const VERSION = '2.0.0b4';65 const FREAD_BUFFER_SIZE = 16384; // Read buffer size in bytes.66 const ICONV_TEST_STRING = ' !"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~ ';70 // Constructor - check PHP enviroment and load library.71 public function __construct() {73 // Static varibles - no need to recalc every time we new getid3.74 static $include_path;75 static $iconv_present;78 static $initialized;79 if ($initialized) {81 // Import static variables82 $this->include_path = $include_path;83 $this->iconv_present = $iconv_present;85 // Run init checks only on first instance.86 return;87 }89 // Get include_path90 $this->include_path = $include_path = dirname(__FILE__) . '/';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 }97 // iconv() not present - load replacement module.98 else {99 $this->include_module('lib.iconv_replacement');100 $this->iconv_present = $iconv_present = false;101 }104 // Require magic_quotes_runtime off105 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 }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 example114 $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 }125 // Check safe_mode off126 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 }130 $initialized = true;131 }135 // Analyze file by name136 public function Analyze($filename) {138 // Init and save values139 $this->filename = $filename;140 $this->warnings = array ();142 // Init result array and set parameters143 $this->info = array ();144 $this->info['GETID3_VERSION'] = getid3::VERSION;146 // Remote files not supported147 if (preg_match('/^(ht|f)tp:\/\//', $filename)) {148 throw new getid3_exception('Remote files are not supported - please copy the file locally first.');149 }151 // Open local file152 if (!$this->fp = @fopen($filename, 'rb')) {153 throw new getid3_exception('Could not open file "'.$filename.'"');154 }156 // Set filesize related parameters157 $this->info['filesize'] = filesize($filename);158 $this->info['avdataoffset'] = 0;159 $this->info['avdataend'] = $this->info['filesize'];161 // Option_max_2gb_check162 if ($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 filesize165 // ftell() returns 0 if seeking to the end is beyond the range of unsigned integer166 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($this->fp);172 throw new getid3_exception('File is most likely larger than 2GB and is not supported by PHP.');173 }174 }177 // ID3v2 detection (NOT parsing) done to make fileformat easier.178 if (!$this->option_tag_id3v2) {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 length187 }188 }191 // Handle tags192 foreach (array ("id3v2", "id3v1", "apetag", "lyrics3") as $tag_name) {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 $e;204 }205 }206 }210 //// Determine file format by magic bytes in file header.212 // Read 32 kb file data213 fseek($this->fp, $this->info['avdataoffset'], SEEK_SET);214 $filedata = fread($this->fp, 32774);216 // Get huge FileFormatArray217 $file_format_array = getid3::GetFileFormatArray();219 // Identify file format - loop through $format_info and detect with reg expr220 foreach ($file_format_array as $name => $info) {222 if (preg_match('/'.$info['pattern'].'/s', $filedata)) { // The /s switch on preg_match() forces preg_match() NOT to treat newline (0x0A) characters as special chars but do a binary match224 // Format detected but not supported225 if (!@$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 }234 $determined_format = $info; // copy $info deleted by foreach()235 continue;236 }237 }239 // Unable to determine file format240 if (!@$determined_format) {242 // Too many mp3 encoders on the market put gabage in front of mpeg files243 // use assume format on these if format detection failed244 if (preg_match('/\.mp[123a]$/i', $filename)) {245 $determined_format = $file_format_array['mp3'];246 }248 else {249 fclose($this->fp);250 throw new getid3_exception('Unable to determine file format');251 }252 }254 // Free memory255 unset($file_format_array);257 // Check for illegal ID3 tags258 if (@$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 $this->warning('ID3v2 tags not allowed on this file type.');266 }267 }269 // Check for illegal APE tags270 if (@$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 }280 // Set mime type281 $this->info['mime_type'] = $determined_format['mime_type'];283 // Calc module file name284 $determined_format['include'] = 'module.'.$determined_format['group'].'.'.$determined_format['module'].'.php';286 // Supported format signature pattern detected, but module deleted.287 if (!file_exists($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 }292 // Include module293 $this->include_module($determined_format['group'].'.'.$determined_format['module']);295 // Instantiate module class and analyze296 $class_name = 'getid3_'.$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);302 try {303 $this->option_analyze and $class->Analyze();304 }305 catch (getid3_exception $e) {306 throw $e;307 }308 catch (Exception $e) {309 throw new getid3_exception('Corrupt file.');310 }312 // Close file313 fclose($this->fp);315 // Optional - Process all tags - copy to 'tags' and convert charsets316 if ($this->option_tags_process) {317 $this->HandleAllTags();318 }321 //// Optional - perform more calculations322 if ($this->option_extra_info) {324 // Set channelmode on audio325 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 }331 // Calculate combined bitrate - audio + video332 $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) / $this->info['bitrate'];340 }342 // Set playtime string343 if (!empty($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($this->info['playtime_seconds']) % 60), 2, 0, STR_PAD_LEFT);;345 }348 // CalculateCompressionRatioVideo() {349 if (@$this->info['video'] && @$this->info['video']['resolution_x'] && @$this->info['video']['resolution_y'] && @$this->info['video']['bits_per_sample']) {351 // From static image formats352 if (in_array($this->info['video']['dataformat'], array ('bmp', 'gif', 'jpeg', 'jpg', 'png', 'tiff'))) {353 $frame_rate = 1;354 $bitrate_compressed = $this->info['filesize'] * 8;355 }357 // From video formats358 else {359 $frame_rate = @$this->info['video']['frame_rate'];360 $bitrate_compressed = @$this->info['video']['bitrate'];361 }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'] * $frame_rate);365 }366 }369 // CalculateCompressionRatioAudio() {370 if (@$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'] ? $this->info['audio']['bits_per_sample'] : 16));372 }374 if (@$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'] ? $stream_data['bits_per_sample'] : 16));378 }379 }380 }383 // CalculateReplayGain() {384 if (@$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'] - $this->info['replay_gain']['album']['adjustment'];393 }395 if (isset($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 }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] = $value;409 }410 }411 }412 }415 // Get the md5/sha1sum of the audio/video portion of the file - without ID3/APE/Lyrics3/etc header/footer tags.416 if ($this->option_md5_data || $this->option_sha1_data) {418 // Load data-hash library if needed419 $this->include_module('lib.data_hash');421 if ($this->option_sha1_data) {422 new getid3_lib_data_hash($this, 'sha1');423 }425 if ($this->option_md5_data) {427 // no md5_data_source or option disabled -- md5_data_source supported by FLAC, MAC, OptimFROG, Wavpack4428 if (!$this->option_md5_data_source || !@$this->info['md5_data_source']) {429 new getid3_lib_data_hash($this, 'md5');430 }432 // copy md5_data_source to md5_data if option set to true433 elseif ($this->option_md5_data_source && @$this->info['md5_data_source']) {434 $this->info['md5_data'] = $this->info['md5_data_source'];435 }436 }437 }439 // Set warnings440 if ($this->warnings) {441 $this->info['warning'] = $this->warnings;442 }444 // Return result445 return $this->info;446 }450 // Return array of warnings451 public function warnings() {453 return $this->warnings;454 }458 // Add warning(s) to $this->warnings[]459 public function warning($message) {461 if (is_array($message)) {462 $this->warnings = array_merge($this->warnings, $message);463 }464 else {465 $this->warnings[] = $message;466 }467 }471 // Clear all warnings when cloning472 public function __clone() {474 $this->warnings = array ();476 // Copy info array, otherwise it will be a reference.477 $temp = $this->info;478 unset($this->info);479 $this->info = $temp;480 }484 // Convert string between charsets -- iconv() wrapper485 public function iconv($in_charset, $out_charset, $string, $drop01 = false) {487 if ($drop01 && ($string === "\x00" || $string === "\x01")) {488 return '';489 }492 if (!$this->iconv_present) {493 return getid3_iconv_replacement::iconv($in_charset, $out_charset, $string);494 }497 // iconv() present498 if ($result = @iconv($in_charset, $out_charset.'//TRANSLIT', $string)) {500 if ($out_charset == 'ISO-8859-1') {501 return rtrim($result, "\x00");502 }503 return $result;504 }506 $this->warning('iconv() was unable to convert the string: "' . $string . '" from ' . $in_charset . ' to ' . $out_charset);507 return $string;508 }512 public function include_module($name) {514 if (!file_exists($this->include_path.'module.'.$name.'.php')) {515 throw new getid3_exception('Required module.'.$name.'.php is missing.');516 }518 include_once($this->include_path.'module.'.$name.'.php');519 }523 public function include_module_optional($name) {525 if (!file_exists($this->include_path.'module.'.$name.'.php')) {526 return;527 }529 include_once($this->include_path.'module.'.$name.'.php');530 return true;531 }534 // Return array containing information about all supported formats535 public static function GetFileFormatArray() {537 static $format_info = array (539 // Audio formats541 // AC-3 - audio - Dolby AC-3 / Dolby Digital542 'ac3' => array (543 'pattern' => '^\x0B\x77',544 'group' => 'audio',545 'module' => 'ac3',546 'mime_type' => 'audio/ac3',547 ),549 // AAC - audio - Advanced Audio Coding (AAC) - ADIF format550 'adif' => array (551 'pattern' => '^ADIF',552 'group' => 'audio',553 'module' => 'aac_adif',554 'mime_type' => 'application/octet-stream',555 'fail_ape' => 'WARNING',556 ),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 ),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 ),577 // AVR - audio - Audio Visual Research578 'avr' => array (579 'pattern' => '^2BIT',580 'group' => 'audio',581 'module' => 'avr',582 'mime_type' => 'application/octet-stream',583 ),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 ),593 // DTS - audio - Dolby Theatre System594 'dts' => array(595 'pattern' => '^\x7F\xFE\x80\x01',596 'group' => 'audio',597 'module' => 'dts',598 'mime_type' => 'audio/dts',599 ),601 // FLAC - audio - Free Lossless Audio Codec602 'flac' => array (603 'pattern' => '^fLaC',604 'group' => 'audio',605 'module' => 'xiph',606 'mime_type' => 'audio/x-flac',607 ),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 ),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 ),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 ),633 // MAC - audio - Monkey's Audio Compressor634 'mac' => array (635 'pattern' => '^MAC ',636 'group' => 'audio',637 'module' => 'monkey',638 'mime_type' => 'application/octet-stream',639 ),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 ),647 // MOD - audio - MODule (Impulse Tracker)648 'it' => array (649 'pattern' => '^IMPM',650 'mime_type' => 'audio/it',651 ),653 // MOD - audio - MODule (eXtended Module, various sub-formats)654 'xm' => array (655 'pattern' => '^Extended Module',656 'mime_type' => 'audio/xm',657 ),659 // MOD - audio - MODule (ScreamTracker)660 's3m' => array (661 'pattern' => '^.{44}SCRM',662 'mime_type' => 'audio/s3m',663 ),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 ),673 // MPC - audio - Musepack / MPEGplus SV4-6674 '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 ),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 ),690 // OFR - audio - OptimFROG691 'ofr' => array (692 'pattern' => '^(\*RIFF|OFR)',693 'group' => 'audio',694 'module' => 'optimfrog',695 'mime_type' => 'application/octet-stream',696 ),698 // RKAU - audio - RKive AUdio compressor699 'rkau' => array (700 'pattern' => '^RKA',701 'group' => 'audio',702 'module' => 'rkau',703 'mime_type' => 'application/octet-stream',704 ),706 // SHN - audio - Shorten707 '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 ),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 ),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 ),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 ),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 ),749 // Audio-Video formats751 // ASF - audio/video - Advanced Streaming Format, Windows Media Video, Windows Media Audio752 '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 ),759 // BINK - audio/video - Bink / Smacker760 'bink' => array(761 'pattern' => '^(BIK|SMK)',762 'mime_type' => 'application/octet-stream',763 ),765 // FLV - audio/video - FLash Video766 'flv' => array(767 'pattern' => '^FLV\x01',768 'group' => 'audio-video',769 'module' => 'flv',770 'mime_type' => 'video/x-flv',771 ),773 // MKAV - audio/video - Mastroka774 'matroska' => array (775 'pattern' => '^\x1A\x45\xDF\xA3',776 'mime_type' => 'application/octet-stream',777 ),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 ),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 ),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 ),805 // QT - audio/video - Quicktime806 '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 ),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 ),822 // Real - audio/video - RealAudio, RealVideo823 'real' => array (824 'pattern' => '^(\.RMF|.ra)',825 'group' => 'audio-video',826 'module' => 'real',827 'mime_type' => 'audio/x-realaudio',828 ),830 // SWF - audio/video - ShockWave Flash831 'swf' => array (832 'pattern' => '^(F|C)WS',833 'group' => 'audio-video',834 'module' => 'swf',835 'mime_type' => 'application/x-shockwave-flash',836 ),839 // Still-Image formats841 // 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 ),851 // GIF - still image - Graphics Interchange Format852 '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 ),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 ),871 // PCD - still image - Kodak Photo CD872 '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 ),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 ),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 ),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 ),913 // Data formats915 'exe' => array(916 'pattern' => '^MZ',917 'mime_type' => 'application/octet-stream',918 'fail_id3' => 'ERROR',919 'fail_ape' => 'ERROR',920 ),922 // ISO - data - International Standards Organization (ISO) CD-ROM Image923 '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 ),932 // RAR - data - RAR compressed data933 'rar' => array(934 'pattern' => '^Rar\!',935 'mime_type' => 'application/octet-stream',936 'fail_id3' => 'ERROR',937 'fail_ape' => 'ERROR',938 ),940 // SZIP - audio - SZIP compressed data941 '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 ),950 // TAR - data - TAR compressed data951 '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 ),960 // GZIP - data - GZIP compressed data961 '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 ),971 // ZIP - data - ZIP compressed data972 '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 ),982 // PAR2 - data - Parity Volume Set Specification 2.0983 'par2' => array (984 'pattern' => '^PAR2\x00PKT',985 'mime_type' => 'application/octet-stream',986 'fail_id3' => 'ERROR',987 'fail_ape' => 'ERROR',988 ),991 // PDF - data - Portable Document Format992 'pdf' => array(993 'pattern' => '^\x25PDF',994 'mime_type' => 'application/pdf',995 'fail_id3' => 'ERROR',996 'fail_ape' => 'ERROR',997 ),999 // DOC - data - Microsoft Word1000 'msoffice' => array(1001 'pattern' => '^\xD0\xCF\x11\xE0', // D0CF11E == DOCFILE == Microsoft Office Document1002 'mime_type' => 'application/octet-stream',1003 'fail_id3' => 'ERROR',1004 'fail_ape' => 'ERROR',1005 ),1006 );1008 return $format_info;1009 }1013 // Recursive over array - converts array to $encoding charset from $this->encoding1014 function CharConvert(&$array, $encoding) {1016 // Identical encoding - end here1017 if ($encoding == $this->encoding) {1018 return;1019 }1021 // Loop thru array1022 foreach ($array as $key => $value) {1024 // Go recursive1025 if (is_array($value)) {1026 $this->CharConvert($array[$key], $encoding);1027 }1029 // Convert string1030 elseif (is_string($value)) {1031 $array[$key] = $this->iconv($encoding, $this->encoding, $value);1032 }1033 }1034 }1038 // Convert and copy tags1039 protected function HandleAllTags() {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 array1056 'id3v2' => array ('id3v2', 'UTF-8'), // module converts all frames to UTF-81057 'ape' => array ('ape', 'UTF-8')1058 );1059 $tags['id3v1'][1] = $this->encoding_id3v1;1061 // Loop thru tags array1062 foreach ($tags as $comment_name => $tag_name_encoding_array) {1063 list($tag_name, $encoding) = $tag_name_encoding_array;1065 // Fill in default encoding type if not already present1066 @$this->info[$comment_name] and $this->info[$comment_name]['encoding'] = $encoding;1068 // Copy comments if key name set1069 if (@$this->info[$comment_name]['comments']) {1071 foreach ($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)][] = $value; // do not trim!! Unicode characters will get mangled if trailing nulls are removed!1075 }1076 }1078 }1080 if (!@$this->info['tags'][$tag_name]) {1081 // comments are set but contain nothing but empty strings, so skip1082 continue;1083 }1085 $this->CharConvert($this->info['tags'][$tag_name], $encoding);1086 }1087 }1090 // Merge comments from ['tags'] into common ['comments']1091 if (@$this->info['tags']) {1093 foreach ($this->info['tags'] as $tag_type => $tag_array) {1095 foreach ($tag_array as $tag_name => $tagdata) {1097 foreach ($tagdata as $key => $value) {1099 if (!empty($value)) {1101 if (empty($this->info['comments'][$tag_name])) {1103 // fall through and append value1104 }1105 elseif ($tag_type == 'id3v1') {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 - skip1112 break 2;1113 }1114 }1115 }1116 else {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 }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 }1137 return true;1138 }1139 }1142 abstract class getid3_handler1143 {1145 protected $getid3; // pointer1147 protected $data_string_flag = false; // analyzing filepointer or string1148 protected $data_string; // string to analyze1149 protected $data_string_position = 0; // seek position in string1152 public function __construct(getID3 $getid3) {1154 $this->getid3 = $getid3;1155 }1158 // Analyze from file pointer1159 abstract public function Analyze();1163 // Analyze from string instead1164 public function AnalyzeString(&$string) {1166 // Enter string mode1167 $this->data_string_flag = true;1168 $this->data_string = $string;1170 // Save info1171 $saved_avdataoffset = $this->getid3->info['avdataoffset'];1172 $saved_avdataend = $this->getid3->info['avdataend'];1173 $saved_filesize = $this->getid3->info['filesize'];1175 // Reset some info1176 $this->getid3->info['avdataoffset'] = 0;1177 $this->getid3->info['avdataend'] = $this->getid3->info['filesize'] = strlen($string);1179 // Analyze1180 $this->Analyze();1182 // Restore some info1183 $this->getid3->info['avdataoffset'] = $saved_avdataoffset;1184 $this->getid3->info['avdataend'] = $saved_avdataend;1185 $this->getid3->info['filesize'] = $saved_filesize;1187 // Exit string mode1188 $this->data_string_flag = false;1189 }1192 protected function ftell() {1194 if ($this->data_string_flag) {1195 return $this->data_string_position;1196 }1197 return ftell($this->getid3->fp);1198 }1201 protected function fread($bytes) {1203 if ($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, $bytes);1208 }1211 protected function fseek($bytes, $whence = SEEK_SET) {1213 if ($this->data_string_flag) {1214 switch ($whence) {1215 case SEEK_SET:1216 $this->data_string_position = $bytes;1217 return;1219 case SEEK_CUR:1220 $this->data_string_position += $bytes;1221 return;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 }1231 }1236 abstract class getid3_handler_write1237 {1238 protected $filename;1239 protected $user_abort;1241 private $fp_lock;1242 private $owner;1243 private $group;1244 private $perms;1247 public function __construct($filename) {1249 if (!file_exists($filename)) {1250 throw new getid3_exception('File does not exist: "' . $filename . '"');1251 }1253 if (!is_writeable($filename)) {1254 throw new getid3_exception('File is not writeable: "' . $filename . '"');1255 }1257 if (!is_writeable(dirname($filename))) {1258 throw new getid3_exception('Directory is not writeable: ' . dirname($filename) . ' (need to write lock file).');1259 }1261 $this->user_abort = ignore_user_abort(true);1263 $this->fp_lock = fopen($filename . '.getid3.lock', 'w');1264 flock($this->fp_lock, LOCK_EX);1266 $this->filename = $filename;1267 }1270 public function __destruct() {1272 flock($this->fp_lock, LOCK_UN);1273 fclose($this->fp_lock);1274 unlink($this->filename . '.getid3.lock');1276 ignore_user_abort($this->user_abort);1277 }1280 protected function save_permissions() {1282 $this->owner = fileowner($this->filename);1283 $this->group = filegroup($this->filename);1284 $this->perms = fileperms($this->filename);1285 }1288 protected function restore_permissions() {1290 @chown($this->filename, $this->owner);1291 @chgrp($this->filename, $this->group);1292 @chmod($this->filename, $this->perms);1293 }1296 abstract public function read();1298 abstract public function write();1300 abstract public function remove();1302 }1307 class getid3_exception extends Exception1308 {1309 public $message;1311 }1316 class getid3_lib1317 {1319 // Convert Little Endian byte string to int - max 32 bits1320 public static function LittleEndian2Int($byte_word, $signed = false) {1322 return getid3_lib::BigEndian2Int(strrev($byte_word), $signed);1323 }1327 // Convert number to Little Endian byte string1328 public static function LittleEndian2String($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, $minbytes, "\x00", STR_PAD_RIGHT);1340 }1344 // Convert Big Endian byte string to int - max 32 bits1345 public static function BigEndian2Int($byte_word, $signed = false) {1347 $int_value = 0;1348 $byte_wordlen = strlen($byte_word);1350 for ($i = 0; $i < $byte_wordlen; $i++) {1351 $int_value += ord($byte_word{$i}) * pow(256, ($byte_wordlen - 1 - $i));1352 }1354 if ($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 }1361 return $int_value;1362 }1366 // Convert Big Endian byte sybc safe string to int - max 32 bits1367 public static function BigEndianSyncSafe2Int($byte_word) {1369 $int_value = 0;1370 $byte_wordlen = strlen($byte_word);1372 // disregard MSB, effectively 7-bit bytes1373 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 $int_value;1377 }1381 // Convert Big Endian byte string to bit string1382 public static function BigEndian2Bin($byte_word) {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 $bin_value;1390 }1394 public static function BigEndian2Float($byte_word) {1396 // ANSI/IEEE Standard 754-1985, Standard for Binary Floating Point Arithmetic1397 // http://www.psc.edu/general/software/packages/ieee/ieee.html1398 // http://www.scri.fsu.edu/~jac/MAD3401/Backgrnd/ieee.html1400 $bit_word = getid3_lib::BigEndian2Bin($byte_word);1401 if (!$bit_word) {1402 return 0;1403 }1404 $sign_bit = $bit_word{0};1406 switch (strlen($byte_word) * 8) {1407 case 32:1408 $exponent_bits = 8;1409 $fraction_bits = 23;1410 break;1412 case 64:1413 $exponent_bits = 11;1414 $fraction_bits = 52;1415 break;1417 case 80:1418 // 80-bit Apple SANE format1419 // 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;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);1441 if (($exponent == (pow(2, $exponent_bits) - 1)) && ($fraction != 0)) {1442 // Not a Number1443 $float_value = false;1444 } elseif (($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' values1459 $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) $float_value;1470 }1474 public static function LittleEndian2Float($byte_word) {1476 return getid3_lib::BigEndian2Float(strrev($byte_word));1477 }1481 public static function DecimalBinary2Float($binary_numerator) {1482 $numerator = bindec($binary_numerator);1483 $denominator = bindec('1'.str_repeat('0', strlen($binary_numerator)));1484 return ($numerator / $denominator);1485 }1488 public static function PrintHexBytes($string, $hex=true, $spaces=true, $html_safe=true) {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 }1509 // Process header data string - read several values with algorithm and add to target1510 // algorithm is one one the getid3_lib::Something2Something() function names1511 // parts_array is index => length - $target[index] = algorithm(substring(data))1512 // - OR just substring(data) if length is negative!1513 // indexes == 'IGNORE**' are ignored1515 public static function ReadSequence($algorithm, &$target, &$data, $offset, $parts_array) {1517 // Loop thru $parts_array1518 foreach ($parts_array as $target_string => $length) {1520 // Add to target1521 if (!strstr($target_string, 'IGNORE')) {1523 // substr(....length)1524 if ($length < 0) {1525 $target[$target_string] = substr($data, $offset, -$length);1526 }1528 // algorithm(substr(...length))1529 else {1530 $target[$target_string] = getid3_lib::$algorithm(substr($data, $offset, $length));1531 }1532 }1534 // Move pointer1535 $offset += abs($length);1536 }1537 }1539 }1543 class getid3_lib_replaygain1544 {1546 public static function NameLookup($name_code) {1548 static $lookup = array (1549 0 => 'not set',1550 1 => 'Track Gain Adjustment',1551 2 => 'Album Gain Adjustment'1552 );1554 return @$lookup[$name_code];1555 }1559 public static function OriginatorLookup($originator_code) {1561 static $lookup = array (1562 0 => 'unspecified',1563 1 => 'pre-set by artist/producer/mastering engineer',1564 2 => 'set by user',1565 3 => 'determined automatically'1566 );1568 return @$lookup[$originator_code];1569 }1573 public static function AdjustmentLookup($raw_adjustment, $sign_bit) {1575 return (float)$raw_adjustment / 10 * ($sign_bit == 1 ? -1 : 1);1576 }1580 public static function GainString($name_code, $originator_code, $replaygain) {1582 $sign_bit = $replaygain < 0 ? 1 : 0;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);1590 return $gain_string;1591 }1593 }1598 ?>