Mercurial > judyates

     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 <infoØgetid3*org>                            |

    15 // |          Allan Hansen <ahØartemis*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{|}~€‚ƒ„…†‡ˆ‰Š‹ŒŽ‘’“”•–—˜™š›œžŸ ¡¢£¤¥¦§¨©ª«¬®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþÿ';

    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 ?>
author	Robert McIntyre <rlm@mit.edu>
date	Sun, 09 Feb 2014 20:46:57 -0500
parents	3f6b44aa6b35
children