Services/MediaObjects/getid3/getid3/getid3.php

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<?php
//  available at http://getid3.sourceforge.net                 //
//            or http://www.getid3.org                         //
//                                                             //
// Please see readme.txt for more information                  //
//                                                            ///

// Defines
define('GETID3_VERSION', '1.7.7');
define('GETID3_FREAD_BUFFER_SIZE', 16384); // read buffer size in bytes



class getID3
{
        // public: Settings
        var $encoding        = 'ISO-8859-1';   // CASE SENSITIVE! - i.e. (must be supported by iconv())
                                               // Examples:  ISO-8859-1  UTF-8  UTF-16  UTF-16BE

        var $encoding_id3v1  = 'ISO-8859-1';   // Should always be 'ISO-8859-1', but some tags may be written in other encodings such as 'EUC-CN'

        var $tempdir         = '*';            // default '*' should use system temp dir

        // public: Optional tag checks - disable for speed.
        var $option_tag_id3v1         = true;  // Read and process ID3v1 tags
        var $option_tag_id3v2         = true;  // Read and process ID3v2 tags
        var $option_tag_lyrics3       = true;  // Read and process Lyrics3 tags
        var $option_tag_apetag        = true;  // Read and process APE tags
        var $option_tags_process      = true;  // Copy tags to root key 'tags' and encode to $this->encoding
        var $option_tags_html         = true;  // Copy tags to root key 'tags_html' properly translated from various encodings to HTML entities

        // public: Optional tag/comment calucations
        var $option_extra_info        = true;  // Calculate additional info such as bitrate, channelmode etc

        // public: Optional calculations
        var $option_md5_data          = false; // Get MD5 sum of data part - slow
        var $option_md5_data_source   = false; // Use MD5 of source file if availble - only FLAC and OptimFROG
        var $option_sha1_data         = false; // Get SHA1 sum of data part - slow
        var $option_max_2gb_check     = true;  // Check whether file is larger than 2 Gb and thus not supported by PHP

        // private
        var $filename;


        // public: constructor
        function getID3()
        {

                $this->startup_error   = '';
                $this->startup_warning = '';

                // Check for PHP version >= 4.1.0
                if (phpversion() < '4.1.0') {
                    $this->startup_error .= 'getID3() requires PHP v4.1.0 or higher - you are running v'.phpversion();
                }

                // Check memory
                $memory_limit = ini_get('memory_limit');
                if (eregi('([0-9]+)M', $memory_limit, $matches)) {
                        // could be stored as "16M" rather than 16777216 for example
                        $memory_limit = $matches[1] * 1048576;
                }
                if ($memory_limit <= 0) {
                        // memory limits probably disabled
                } elseif ($memory_limit <= 3145728) {
                $this->startup_error .= 'PHP has less than 3MB available memory and will very likely run out. Increase memory_limit in php.ini';
                } elseif ($memory_limit <= 12582912) {
                $this->startup_warning .= 'PHP has less than 12MB available memory and might run out if all modules are loaded. Increase memory_limit in php.ini';
                }

                // Check safe_mode off
                if ((bool) ini_get('safe_mode')) {
                    $this->warning('WARNING: Safe mode is on, shorten support disabled, md5data/sha1data for ogg vorbis disabled, ogg vorbos/flac tag writing disabled.');
                }


                // define a constant rather than looking up every time it is needed
                if (!defined('GETID3_OS_ISWINDOWS')) {
                        if (strtoupper(substr(PHP_OS, 0, 3)) == 'WIN') {
                                define('GETID3_OS_ISWINDOWS', true);
                        } else {
                                define('GETID3_OS_ISWINDOWS', false);
                        }
                }

                // Get base path of getID3() - ONCE
                if (!defined('GETID3_INCLUDEPATH')) {
                        foreach (get_included_files() as $key => $val) {
                                if (basename($val) == 'getid3.php') {
                                        define('GETID3_INCLUDEPATH', dirname($val).DIRECTORY_SEPARATOR);
                                        break;
                                }
                        }
                }

                // Load support library
                if (!include_once(GETID3_INCLUDEPATH.'getid3.lib.php')) {
                        $this->startup_error .= 'getid3.lib.php is missing or corrupt';
                }


                // Needed for Windows only:
                // Define locations of helper applications for Shorten, VorbisComment, MetaFLAC
                //   as well as other helper functions such as head, tail, md5sum, etc
                // IMPORTANT: This path cannot have spaces in it. If neccesary, use the 8dot3 equivalent
                //   ie for "C:/Program Files/Apache/" put "C:/PROGRA~1/APACHE/"
                // IMPORTANT: This path must include the trailing slash
                if (GETID3_OS_ISWINDOWS && !defined('GETID3_HELPERAPPSDIR')) {
                        $helperappsdir = GETID3_INCLUDEPATH.'..'.DIRECTORY_SEPARATOR.'helperapps'; // must not have any space in this path

                        if (!is_dir($helperappsdir)) {

                                $this->startup_error .= '"'.$helperappsdir.'" cannot be defined as GETID3_HELPERAPPSDIR because it does not exist';

                        } elseif (strpos(realpath($helperappsdir), ' ') !== false) {

                                $DirPieces = explode(DIRECTORY_SEPARATOR, realpath($helperappsdir));
                                $DirPieces8 = $DirPieces;

                                $CLIdir = $DirPieces[0].' && cd \\';
                                for ($i = 1; $i < count($DirPieces); $i++) {
                                  if (strpos($DirPieces[$i], ' ') === false) {
                                    $CLIdir .= ' && cd '.$DirPieces[$i];
                                  } else {
                                    ob_start();
                                    system($CLIdir.' && dir /ad /x');
                                    $subdirsraw = explode("\n", ob_get_contents());
                                    ob_end_clean();
                                    foreach ($subdirsraw as $dummy => $line) {
                                      if (eregi('^[0-9]{4}/[0-9]{2}/[0-9]{2}  [0-9]{2}:[0-9]{2} [AP]M    <DIR>          ([^ ]{8})     '.preg_quote($DirPieces[$i]).'$', trim($line), $matches)) {
                                        $CLIdir .= ' && cd '.$matches[1];
                                        break;
                                      }
                                    }
                                    $DirPieces8[$i] = $matches[1];
                                  }
                                }
                                $helperappsdir = implode(DIRECTORY_SEPARATOR, $DirPieces8);

                        }
                        define('GETID3_HELPERAPPSDIR', realpath($helperappsdir).DIRECTORY_SEPARATOR);

                }

        }


        // public: setOption
        function setOption($optArray) {
                if (!is_array($optArray) || empty($optArray)) {
                        return false;
                }
                foreach ($optArray as $opt => $val) {
                        if (isset($this, $opt) === false) {
                                continue;
                        }
                        $this->$opt = $val;
                }
                return true;
        }


        // public: analyze file - replaces GetAllFileInfo() and GetTagOnly()
        function analyze($filename) {

                if (!empty($this->startup_error)) {
                        return $this->error($this->startup_error);
                }
                if (!empty($this->startup_warning)) {
                        $this->warning($this->startup_warning);
                }

                // init result array and set parameters
                $this->info = array();
                $this->info['GETID3_VERSION'] = GETID3_VERSION;

                // Check encoding/iconv support
                if (!function_exists('iconv') && !in_array($this->encoding, array('ISO-8859-1', 'UTF-8', 'UTF-16LE', 'UTF-16BE', 'UTF-16'))) {
                        $errormessage = 'iconv() support is needed for encodings other than ISO-8859-1, UTF-8, UTF-16LE, UTF16-BE, UTF-16. ';
                        if (GETID3_OS_ISWINDOWS) {
                                $errormessage .= 'PHP does not have iconv() support. Please enable php_iconv.dll in php.ini, and copy iconv.dll from c:/php/dlls to c:/windows/system32';
                        } else {
                                $errormessage .= 'PHP is not compiled with iconv() support. Please recompile with the --with-iconv switch';
                        }
                return $this->error($errormessage);
                }

                // Disable magic_quotes_runtime, if neccesary
                $old_magic_quotes_runtime = get_magic_quotes_runtime(); // store current setting of magic_quotes_runtime
                if ($old_magic_quotes_runtime) {
                        set_magic_quotes_runtime(0);                        // turn off magic_quotes_runtime
                        if (get_magic_quotes_runtime()) {
                                return $this->error('Could not disable magic_quotes_runtime - getID3() cannot work properly with this setting enabled');
                        }
                }

                // remote files not supported
                if (preg_match('/^(ht|f)tp:\/\//', $filename)) {
                        return $this->error('Remote files are not supported in this version of getID3() - please copy the file locally first');
                }

                // open local file
                if (!$fp = @fopen($filename, 'rb')) {
                        return $this->error('Could not open file "'.$filename.'"');
                }

                // set parameters
                $this->info['filesize'] = filesize($filename);

                // option_max_2gb_check
                if ($this->option_max_2gb_check) {
                        // PHP doesn't support integers larger than 31-bit (~2GB)
                        // filesize() simply returns (filesize % (pow(2, 32)), no matter the actual filesize
                        // ftell() returns 0 if seeking to the end is beyond the range of unsigned integer
                        fseek($fp, 0, SEEK_END);
                        if ((($this->info['filesize'] != 0) && (ftell($fp) == 0)) ||
                                ($this->info['filesize'] < 0) ||
                                (ftell($fp) < 0)) {
                                        unset($this->info['filesize']);
                                        fclose($fp);
                                        return $this->error('File is most likely larger than 2GB and is not supported by PHP');
                        }
                }

                // set more parameters
                $this->info['avdataoffset']        = 0;
                $this->info['avdataend']           = $this->info['filesize'];
                $this->info['fileformat']          = '';                // filled in later
                $this->info['audio']['dataformat'] = '';                // filled in later, unset if not used
                $this->info['video']['dataformat'] = '';                // filled in later, unset if not used
                $this->info['tags']                = array();           // filled in later, unset if not used
                $this->info['error']               = array();           // filled in later, unset if not used
                $this->info['warning']             = array();           // filled in later, unset if not used
                $this->info['comments']            = array();           // filled in later, unset if not used
                $this->info['encoding']            = $this->encoding;   // required by id3v2 and iso modules - can be unset at the end if desired

                // set redundant parameters - might be needed in some include file
                $this->info['filename']            = basename($filename);
                $this->info['filepath']            = str_replace('\\', '/', realpath(dirname($filename)));
                $this->info['filenamepath']        = $this->info['filepath'].'/'.$this->info['filename'];


                // handle ID3v2 tag - done first - already at beginning of file
                // ID3v2 detection (even if not parsing) is always done otherwise fileformat is much harder to detect
                if ($this->option_tag_id3v2) {

                        $GETID3_ERRORARRAY = &$this->info['warning'];
                        if (getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.tag.id3v2.php', __FILE__, false)) {
                                $tag = new getid3_id3v2($fp, $this->info);
                        }

                } else {

                        fseek($fp, 0, SEEK_SET);
                        $header = fread($fp, 10);
                        if (substr($header, 0, 3) == 'ID3') {
                                $this->info['id3v2']['header']           = true;
                                $this->info['id3v2']['majorversion']     = ord($header{3});
                                $this->info['id3v2']['minorversion']     = ord($header{4});
                                $this->info['id3v2']['headerlength']     = getid3_lib::BigEndian2Int(substr($header, 6, 4), 1) + 10; // length of ID3v2 tag in 10-byte header doesn't include 10-byte header length

                                $this->info['id3v2']['tag_offset_start'] = 0;
                                $this->info['id3v2']['tag_offset_end']   = $this->info['id3v2']['tag_offset_start'] + $this->info['id3v2']['headerlength'];
                                $this->info['avdataoffset']              = $this->info['id3v2']['tag_offset_end'];
                        }

                }


                // handle ID3v1 tag
                if ($this->option_tag_id3v1) {
                        if (!@include_once(GETID3_INCLUDEPATH.'module.tag.id3v1.php')) {
                                return $this->error('module.tag.id3v1.php is missing - you may disable option_tag_id3v1.');
                        }
                        $tag = new getid3_id3v1($fp, $this->info);
                }

                // handle APE tag
                if ($this->option_tag_apetag) {
                        if (!@include_once(GETID3_INCLUDEPATH.'module.tag.apetag.php')) {
                                return $this->error('module.tag.apetag.php is missing - you may disable option_tag_apetag.');
                        }
                        $tag = new getid3_apetag($fp, $this->info);
                }

                // handle lyrics3 tag
                if ($this->option_tag_lyrics3) {
                        if (!@include_once(GETID3_INCLUDEPATH.'module.tag.lyrics3.php')) {
                                return $this->error('module.tag.lyrics3.php is missing - you may disable option_tag_lyrics3.');
                        }
                        $tag = new getid3_lyrics3($fp, $this->info);
                }

                // read 32 kb file data
                fseek($fp, $this->info['avdataoffset'], SEEK_SET);
                $formattest = fread($fp, 32774);

                // determine format
                $determined_format = $this->GetFileFormat($formattest, $filename);

                // unable to determine file format
                if (!$determined_format) {
                        fclose($fp);
                        return $this->error('unable to determine file format');
                }

                // check for illegal ID3 tags
                if (isset($determined_format['fail_id3']) && (in_array('id3v1', $this->info['tags']) || in_array('id3v2', $this->info['tags']))) {
                        if ($determined_format['fail_id3'] === 'ERROR') {
                                fclose($fp);
                                return $this->error('ID3 tags not allowed on this file type.');
                        } elseif ($determined_format['fail_id3'] === 'WARNING') {
                                $this->info['warning'][] = 'ID3 tags not allowed on this file type.';
                        }
                }

                // check for illegal APE tags
                if (isset($determined_format['fail_ape']) && in_array('ape', $this->info['tags'])) {
                        if ($determined_format['fail_ape'] === 'ERROR') {
                                fclose($fp);
                                return $this->error('APE tags not allowed on this file type.');
                        } elseif ($determined_format['fail_ape'] === 'WARNING') {
                                $this->info['warning'][] = 'APE tags not allowed on this file type.';
                        }
                }

                // set mime type
                $this->info['mime_type'] = $determined_format['mime_type'];

                // supported format signature pattern detected, but module deleted
                if (!file_exists(GETID3_INCLUDEPATH.$determined_format['include'])) {
                        fclose($fp);
                        return $this->error('Format not supported, module, '.$determined_format['include'].', was removed.');
                }

                // module requires iconv support
        if (!function_exists('iconv') && @$determined_format['iconv_req']) {
                    return $this->error('iconv support is required for this module ('.$determined_format['include'].').');
                }

                // include module
                include_once(GETID3_INCLUDEPATH.$determined_format['include']);

                // instantiate module class
                $class_name = 'getid3_'.$determined_format['module'];
                if (!class_exists($class_name)) {
                        return $this->error('Format not supported, module, '.$determined_format['include'].', is corrupt.');
                }
                if (isset($determined_format['option'])) {
                        $class = new $class_name($fp, $this->info, $determined_format['option']);
                } else {
                        $class = new $class_name($fp, $this->info);
                }

                // close file
                fclose($fp);

                // process all tags - copy to 'tags' and convert charsets
                if ($this->option_tags_process) {
                        $this->HandleAllTags();
                }

                // perform more calculations
                if ($this->option_extra_info) {
                        $this->ChannelsBitratePlaytimeCalculations();
                        $this->CalculateCompressionRatioVideo();
                        $this->CalculateCompressionRatioAudio();
                        $this->CalculateReplayGain();
                        $this->ProcessAudioStreams();
                }

                // get the MD5 sum of the audio/video portion of the file - without ID3/APE/Lyrics3/etc header/footer tags
                if ($this->option_md5_data) {
                        // do not cald md5_data if md5_data_source is present - set by flac only - future MPC/SV8 too
                        if (!$this->option_md5_data_source || empty($this->info['md5_data_source'])) {
                                $this->getHashdata('md5');
                        }
                }

                // get the SHA1 sum of the audio/video portion of the file - without ID3/APE/Lyrics3/etc header/footer tags
                if ($this->option_sha1_data) {
                        $this->getHashdata('sha1');
                }

                // remove undesired keys
                $this->CleanUp();

                // restore magic_quotes_runtime setting
                set_magic_quotes_runtime($old_magic_quotes_runtime);

                // return info array
                return $this->info;
        }


        // private: error handling
        function error($message) {

                $this->CleanUp();

                $this->info['error'][] = $message;
                return $this->info;
        }


        // private: warning handling
        function warning($message) {
                $this->info['warning'][] = $message;
                return true;
        }


        // private: CleanUp
        function CleanUp() {

                // remove possible empty keys
                $AVpossibleEmptyKeys = array('dataformat', 'bits_per_sample', 'encoder_options', 'streams');
                foreach ($AVpossibleEmptyKeys as $dummy => $key) {
                        if (empty($this->info['audio'][$key]) && isset($this->info['audio'][$key])) {
                                unset($this->info['audio'][$key]);
                        }
                        if (empty($this->info['video'][$key]) && isset($this->info['video'][$key])) {
                                unset($this->info['video'][$key]);
                        }
                }

                // remove empty root keys
                if (!empty($this->info)) {
                        foreach ($this->info as $key => $value) {
                                if (empty($this->info[$key]) && ($this->info[$key] !== 0) && ($this->info[$key] !== '0')) {
                                        unset($this->info[$key]);
                                }
                        }
                }

                // remove meaningless entries from unknown-format files
                if (empty($this->info['fileformat'])) {
                        if (isset($this->info['avdataoffset'])) {
                                unset($this->info['avdataoffset']);
                        }
                        if (isset($this->info['avdataend'])) {
                                unset($this->info['avdataend']);
                        }
                }
        }


        // return array containing information about all supported formats
        function GetFileFormatArray() {
                static $format_info = array();
                if (empty($format_info)) {
                        $format_info = array(

                                // Audio formats

                                // AC-3   - audio      - Dolby AC-3 / Dolby Digital
                                'ac3'  => array(
                                                        'pattern'   => '^\x0B\x77',
                                                        'group'     => 'audio',
                                                        'module'    => 'ac3',
                                                        'mime_type' => 'audio/ac3',
                                                ),

                                // AAC  - audio       - Advanced Audio Coding (AAC) - ADIF format
                                'adif' => array(
                                                        'pattern'   => '^ADIF',
                                                        'group'     => 'audio',
                                                        'module'    => 'aac',
                                                        'option'    => 'adif',
                                                        'mime_type' => 'application/octet-stream',
                                                        'fail_ape'  => 'WARNING',
                                                ),


                                // AAC  - audio       - Advanced Audio Coding (AAC) - ADTS format (very similar to MP3)
                                'adts' => array(
                                                        'pattern'   => '^\xFF[\xF0-\xF1\xF8-\xF9]',
                                                        'group'     => 'audio',
                                                        'module'    => 'aac',
                                                        'option'    => 'adts',
                                                        'mime_type' => 'application/octet-stream',
                                                        'fail_ape'  => 'WARNING',
                                                ),


                                // AU   - audio       - NeXT/Sun AUdio (AU)
                                'au'   => array(
                                                        'pattern'   => '^\.snd',
                                                        'group'     => 'audio',
                                                        'module'    => 'au',
                                                        'mime_type' => 'audio/basic',
                                                ),

                                // AVR  - audio       - Audio Visual Research
                                'avr'  => array(
                                                        'pattern'   => '^2BIT',
                                                        'group'     => 'audio',
                                                        'module'    => 'avr',
                                                        'mime_type' => 'application/octet-stream',
                                                ),

                                // BONK - audio       - Bonk v0.9+
                                'bonk' => array(
                                                        'pattern'   => '^\x00(BONK|INFO|META| ID3)',
                                                        'group'     => 'audio',
                                                        'module'    => 'bonk',
                                                        'mime_type' => 'audio/xmms-bonk',
                                                ),

                                // FLAC - audio       - Free Lossless Audio Codec
                                'flac' => array(
                                                        'pattern'   => '^fLaC',
                                                        'group'     => 'audio',
                                                        'module'    => 'flac',
                                                        'mime_type' => 'audio/x-flac',
                                                ),

                                // LA   - audio       - Lossless Audio (LA)
                                'la'   => array(
                                                        'pattern'   => '^LA0[2-4]',
                                                        'group'     => 'audio',
                                                        'module'    => 'la',
                                                        'mime_type' => 'application/octet-stream',
                                                ),

                                // LPAC - audio       - Lossless Predictive Audio Compression (LPAC)
                                'lpac' => array(
                                                        'pattern'   => '^LPAC',
                                                        'group'     => 'audio',
                                                        'module'    => 'lpac',
                                                        'mime_type' => 'application/octet-stream',
                                                ),

                                // MIDI - audio       - MIDI (Musical Instrument Digital Interface)
                                'midi' => array(
                                                        'pattern'   => '^MThd',
                                                        'group'     => 'audio',
                                                        'module'    => 'midi',
                                                        'mime_type' => 'audio/midi',
                                                ),

                                // MAC  - audio       - Monkey's Audio Compressor
                                'mac'  => array(
                                                        'pattern'   => '^MAC ',
                                                        'group'     => 'audio',
                                                        'module'    => 'monkey',
                                                        'mime_type' => 'application/octet-stream',
                                                ),

                                // MOD  - audio       - MODule (assorted sub-formats)
                                'mod'  => array(
                                                        'pattern'   => '^.{1080}(M.K.|[5-9]CHN|[1-3][0-9]CH)',
                                                        'group'     => 'audio',
                                                        'module'    => 'mod',
                                                        'option'    => 'mod',
                                                        'mime_type' => 'audio/mod',
                                                ),

                                // MOD  - audio       - MODule (Impulse Tracker)
                                'it'   => array(
                                                        'pattern'   => '^IMPM',
                                                        'group'     => 'audio',
                                                        'module'    => 'mod',
                                                        'option'    => 'it',
                                                        'mime_type' => 'audio/it',
                                                ),

                                // MOD  - audio       - MODule (eXtended Module, various sub-formats)
                                'xm'   => array(
                                                        'pattern'   => '^Extended Module',
                                                        'group'     => 'audio',
                                                        'module'    => 'mod',
                                                        'option'    => 'xm',
                                                        'mime_type' => 'audio/xm',
                                                ),

                                // MOD  - audio       - MODule (ScreamTracker)
                                's3m'  => array(
                                                        'pattern'   => '^.{44}SCRM',
                                                        'group'     => 'audio',
                                                        'module'    => 'mod',
                                                        'option'    => 's3m',
                                                        'mime_type' => 'audio/s3m',
                                                ),

                                // MPC  - audio       - Musepack / MPEGplus
                                'mpc'  => array(
                                                        'pattern'   => '^(MP\+|[\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])',
                                                        'group'     => 'audio',
                                                        'module'    => 'mpc',
                                                        'mime_type' => 'application/octet-stream',
                                                ),

                                // MP3  - audio       - MPEG-audio Layer 3 (very similar to AAC-ADTS)
                                'mp3'  => array(
                                                        'pattern'   => '^\xFF[\xE2-\xE7\xF2-\xF7\xFA-\xFF][\x00-\xEB]',
                                                        'group'     => 'audio',
                                                        'module'    => 'mp3',
                                                        'mime_type' => 'audio/mpeg',
                                                ),

                                // OFR  - audio       - OptimFROG
                                'ofr'  => array(
                                                        'pattern'   => '^(\*RIFF|OFR)',
                                                        'group'     => 'audio',
                                                        'module'    => 'optimfrog',
                                                        'mime_type' => 'application/octet-stream',
                                                ),

                                // RKAU - audio       - RKive AUdio compressor
                                'rkau' => array(
                                                        'pattern'   => '^RKA',
                                                        'group'     => 'audio',
                                                        'module'    => 'rkau',
                                                        'mime_type' => 'application/octet-stream',
                                                ),

                                // SHN  - audio       - Shorten
                                'shn'  => array(
                                                        'pattern'   => '^ajkg',
                                                        'group'     => 'audio',
                                                        'module'    => 'shorten',
                                                        'mime_type' => 'audio/xmms-shn',
                                                        'fail_id3'  => 'ERROR',
                                                        'fail_ape'  => 'ERROR',
                                                ),

                                // TTA  - audio       - TTA Lossless Audio Compressor (http://tta.corecodec.org)
                                'tta'  => array(
                                                        'pattern'   => '^TTA',  // could also be '^TTA(\x01|\x02|\x03|2|1)'
                                                        'group'     => 'audio',
                                                        'module'    => 'tta',
                                                        'mime_type' => 'application/octet-stream',
                                                ),

                                // VOC  - audio       - Creative Voice (VOC)
                                'voc'  => array(
                                                        'pattern'   => '^Creative Voice File',
                                                        'group'     => 'audio',
                                                        'module'    => 'voc',
                                                        'mime_type' => 'audio/voc',
                                                ),

                                // VQF  - audio       - transform-domain weighted interleave Vector Quantization Format (VQF)
                                'vqf'  => array(
                                                        'pattern'   => '^TWIN',
                                                        'group'     => 'audio',
                                                        'module'    => 'vqf',
                                                        'mime_type' => 'application/octet-stream',
                                                ),

                                // WV  - audio        - WavPack (v4.0+)
                                'wv'   => array(
                                                        'pattern'   => '^wvpk',
                                                        'group'     => 'audio',
                                                        'module'    => 'wavpack',
                                                        'mime_type' => 'application/octet-stream',
                                                ),


                                // Audio-Video formats

                                // ASF  - audio/video - Advanced Streaming Format, Windows Media Video, Windows Media Audio
                                'asf'  => array(
                                                        'pattern'   => '^\x30\x26\xB2\x75\x8E\x66\xCF\x11\xA6\xD9\x00\xAA\x00\x62\xCE\x6C',
                                                        'group'     => 'audio-video',
                                                        'module'    => 'asf',
                                                        'mime_type' => 'video/x-ms-asf',
                                                        'iconv_req' => false,
                                                ),

                                // BINK - audio/video - Bink / Smacker
                                'bink' => array(
                                                        'pattern'   => '^(BIK|SMK)',
                                                        'group'     => 'audio-video',
                                                        'module'    => 'bink',
                                                        'mime_type' => 'application/octet-stream',
                                                ),

                                // FLV  - audio/video - FLash Video
                                'flv' => array(
                                                        'pattern'   => '^FLV\x01',
                                                        'group'     => 'audio-video',
                                                        'module'    => 'flv',
                                                        'mime_type' => 'video/x-flv',
                                                ),

                                // MKAV - audio/video - Mastroka
                                'matroska' => array(
                                                        'pattern'   => '^\x1A\x45\xDF\xA3',
                                                        'group'     => 'audio-video',
                                                        'module'    => 'matroska',
                                                        'mime_type' => 'application/octet-stream',
                                                ),

                                // MPEG - audio/video - MPEG (Moving Pictures Experts Group)
                                'mpeg' => array(
                                                        'pattern'   => '^\x00\x00\x01(\xBA|\xB3)',
                                                        'group'     => 'audio-video',
                                                        'module'    => 'mpeg',
                                                        'mime_type' => 'video/mpeg',
                                                ),

                                // NSV  - audio/video - Nullsoft Streaming Video (NSV)
                                'nsv'  => array(
                                                        'pattern'   => '^NSV[sf]',
                                                        'group'     => 'audio-video',
                                                        'module'    => 'nsv',
                                                        'mime_type' => 'application/octet-stream',
                                                ),

                                // Ogg  - audio/video - Ogg (Ogg-Vorbis, Ogg-FLAC, Speex, Ogg-Theora(*), Ogg-Tarkin(*))
                                'ogg'  => array(
                                                        'pattern'   => '^OggS',
                                                        'group'     => 'audio',
                                                        'module'    => 'ogg',
                                                        'mime_type' => 'application/ogg',
                                                        'fail_id3'  => 'WARNING',
                                                        'fail_ape'  => 'WARNING',
                                                ),

                                // QT   - audio/video - Quicktime
                                'quicktime' => array(
                                                        'pattern'   => '^.{4}(cmov|free|ftyp|mdat|moov|pnot|skip|wide)',
                                                        'group'     => 'audio-video',
                                                        'module'    => 'quicktime',
                                                        'mime_type' => 'video/quicktime',
                                                ),

                                // 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)
                                'riff' => array(
                                                        'pattern'   => '^(RIFF|SDSS|FORM)',
                                                        'group'     => 'audio-video',
                                                        'module'    => 'riff',
                                                        'mime_type' => 'audio/x-wave',
                                                        'fail_ape'  => 'WARNING',
                                                ),

                                // Real - audio/video - RealAudio, RealVideo
                                'real' => array(
                                                        'pattern'   => '^(\.RMF|.ra)',
                                                        'group'     => 'audio-video',
                                                        'module'    => 'real',
                                                        'mime_type' => 'audio/x-realaudio',
                                                ),

                                // SWF - audio/video - ShockWave Flash
                                'swf' => array(
                                                        'pattern'   => '^(F|C)WS',
                                                        'group'     => 'audio-video',
                                                        'module'    => 'swf',
                                                        'mime_type' => 'application/x-shockwave-flash',
                                                ),


                                // Still-Image formats

                                // BMP  - still image - Bitmap (Windows, OS/2; uncompressed, RLE8, RLE4)
                                'bmp'  => array(
                                                        'pattern'   => '^BM',
                                                        'group'     => 'graphic',
                                                        'module'    => 'bmp',
                                                        'mime_type' => 'image/bmp',
                                                        'fail_id3'  => 'ERROR',
                                                        'fail_ape'  => 'ERROR',
                                                ),

                                // GIF  - still image - Graphics Interchange Format
                                'gif'  => array(
                                                        'pattern'   => '^GIF',
                                                        'group'     => 'graphic',
                                                        'module'    => 'gif',
                                                        'mime_type' => 'image/gif',
                                                        'fail_id3'  => 'ERROR',
                                                        'fail_ape'  => 'ERROR',
                                                ),

                                // JPEG - still image - Joint Photographic Experts Group (JPEG)
                                'jpg'  => array(
                                                        'pattern'   => '^\xFF\xD8\xFF',
                                                        'group'     => 'graphic',
                                                        'module'    => 'jpg',
                                                        'mime_type' => 'image/jpeg',
                                                        'fail_id3'  => 'ERROR',
                                                        'fail_ape'  => 'ERROR',
                                                ),

                                // PCD  - still image - Kodak Photo CD
                                'pcd'  => array(
                                                        'pattern'   => '^.{2048}PCD_IPI\x00',
                                                        'group'     => 'graphic',
                                                        'module'    => 'pcd',
                                                        'mime_type' => 'image/x-photo-cd',
                                                        'fail_id3'  => 'ERROR',
                                                        'fail_ape'  => 'ERROR',
                                                ),


                                // PNG  - still image - Portable Network Graphics (PNG)
                                'png'  => array(
                                                        'pattern'   => '^\x89\x50\x4E\x47\x0D\x0A\x1A\x0A',
                                                        'group'     => 'graphic',
                                                        'module'    => 'png',
                                                        'mime_type' => 'image/png',
                                                        'fail_id3'  => 'ERROR',
                                                        'fail_ape'  => 'ERROR',
                                                ),


                                // TIFF  - still image - Tagged Information File Format (TIFF)
                                'tiff' => array(
                                                        'pattern'   => '^(II\x2A\x00|MM\x00\x2A)',
                                                        'group'     => 'graphic',
                                                        'module'    => 'tiff',
                                                        'mime_type' => 'image/tiff',
                                                        'fail_id3'  => 'ERROR',
                                                        'fail_ape'  => 'ERROR',
                                                ),


                                // Data formats

                                // ISO  - data        - International Standards Organization (ISO) CD-ROM Image
                                'iso'  => array(
                                                        'pattern'   => '^.{32769}CD001',
                                                        'group'     => 'misc',
                                                        'module'    => 'iso',
                                                        'mime_type' => 'application/octet-stream',
                                                        'fail_id3'  => 'ERROR',
                                                        'fail_ape'  => 'ERROR',
                                                        'iconv_req' => false,
                                                ),

                                // RAR  - data        - RAR compressed data
                                'rar'  => array(
                                                        'pattern'   => '^Rar\!',
                                                        'group'     => 'archive',
                                                        'module'    => 'rar',
                                                        'mime_type' => 'application/octet-stream',
                                                        'fail_id3'  => 'ERROR',
                                                        'fail_ape'  => 'ERROR',
                                                ),

                                // SZIP - audio/data  - SZIP compressed data
                                'szip' => array(
                                                        'pattern'   => '^SZ\x0A\x04',
                                                        'group'     => 'archive',
                                                        'module'    => 'szip',
                                                        'mime_type' => 'application/octet-stream',
                                                        'fail_id3'  => 'ERROR',
                                                        'fail_ape'  => 'ERROR',
                                                ),

                                // TAR  - data        - TAR compressed data
                                'tar'  => array(
                                                        '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}',
                                                        'group'     => 'archive',
                                                        'module'    => 'tar',
                                                        'mime_type' => 'application/x-tar',
                                                        'fail_id3'  => 'ERROR',
                                                        'fail_ape'  => 'ERROR',
                                                ),

                                // GZIP  - data        - GZIP compressed data
                                'gz'  => array(
                                                        'pattern'   => '^\x1F\x8B\x08',
                                                        'group'     => 'archive',
                                                        'module'    => 'gzip',
                                                        'mime_type' => 'application/x-gzip',
                                                        'fail_id3'  => 'ERROR',
                                                        'fail_ape'  => 'ERROR',
                                                ),

                                // ZIP  - data         - ZIP compressed data
                                'zip'  => array(
                                                        'pattern'   => '^PK\x03\x04',
                                                        'group'     => 'archive',
                                                        'module'    => 'zip',
                                                        'mime_type' => 'application/zip',
                                                        'fail_id3'  => 'ERROR',
                                                        'fail_ape'  => 'ERROR',
                                                ),


                                // Misc other formats

                                // PDF  - data         - ZIP compressed data
                                'pdf'  => array(
                                                        'pattern'   => '^\x25PDF',
                                                        'group'     => 'misc',
                                                        'module'    => 'pdf',
                                                        'mime_type' => 'application/pdf',
                                                        'fail_id3'  => 'ERROR',
                                                        'fail_ape'  => 'ERROR',
                                                ),

                                // MSOFFICE  - data         - ZIP compressed data
                                'msoffice' => array(
                                                        'pattern'   => '^\xD0\xCF\x11\xE0', // D0CF11E == DOCFILE == Microsoft Office Document
                                                        'group'     => 'misc',
                                                        'module'    => 'msoffice',
                                                        'mime_type' => 'application/octet-stream',
                                                        'fail_id3'  => 'ERROR',
                                                        'fail_ape'  => 'ERROR',
                                                ),
                        );
                }

                return $format_info;
        }



        function GetFileFormat(&$filedata, $filename='') {
                // this function will determine the format of a file based on usually
                // the first 2-4 bytes of the file (8 bytes for PNG, 16 bytes for JPG,
                // and in the case of ISO CD image, 6 bytes offset 32kb from the start
                // of the file).

                // Identify file format - loop through $format_info and detect with reg expr
                foreach ($this->GetFileFormatArray() as $format_name => $info) {
                        // Using preg_match() instead of ereg() - much faster
                        // The /s switch on preg_match() forces preg_match() NOT to treat
                        // newline (0x0A) characters as special chars but do a binary match
                        if (preg_match('/'.$info['pattern'].'/s', $filedata)) {
                                $info['include'] = 'module.'.$info['group'].'.'.$info['module'].'.php';
                                return $info;
                        }
                }


                if (preg_match('/\.mp[123a]$/i', $filename)) {
                        // Too many mp3 encoders on the market put gabage in front of mpeg files
                        // use assume format on these if format detection failed
                        $GetFileFormatArray = $this->GetFileFormatArray();
                        $info = $GetFileFormatArray['mp3'];
                        $info['include'] = 'module.'.$info['group'].'.'.$info['module'].'.php';
                        return $info;
                }

                return false;
        }


        // converts array to $encoding charset from $this->encoding
        function CharConvert(&$array, $encoding) {

                // identical encoding - end here
                if ($encoding == $this->encoding) {
                        return;
                }

                // loop thru array
                foreach ($array as $key => $value) {

                        // go recursive
                        if (is_array($value)) {
                                $this->CharConvert($array[$key], $encoding);
                        }

                        // convert string
                        elseif (is_string($value)) {
                                $array[$key] = trim(getid3_lib::iconv_fallback($encoding, $this->encoding, $value));
                        }
                }
        }


        function HandleAllTags() {

                // key name => array (tag name, character encoding)
                static $tags;
                if (empty($tags)) {
                        $tags = array(
                                'asf'       => array('asf'           , 'UTF-16LE'),
                                'midi'      => array('midi'          , 'ISO-8859-1'),
                                'nsv'       => array('nsv'           , 'ISO-8859-1'),
                                'ogg'       => array('vorbiscomment' , 'UTF-8'),
                                'png'       => array('png'           , 'UTF-8'),
                                'tiff'      => array('tiff'          , 'ISO-8859-1'),
                                'quicktime' => array('quicktime'     , 'ISO-8859-1'),
                                'real'      => array('real'          , 'ISO-8859-1'),
                                'vqf'       => array('vqf'           , 'ISO-8859-1'),
                                'zip'       => array('zip'           , 'ISO-8859-1'),
                                'riff'      => array('riff'          , 'ISO-8859-1'),
                                'lyrics3'   => array('lyrics3'       , 'ISO-8859-1'),
                                'id3v1'     => array('id3v1'         , $this->encoding_id3v1),
                                'id3v2'     => array('id3v2'         , 'UTF-8'), // not according to the specs (every frame can have a different encoding), but getID3() force-converts all encodings to UTF-8
                                'ape'       => array('ape'           , 'UTF-8')
                        );
                }

                // loop thru comments array
                foreach ($tags as $comment_name => $tagname_encoding_array) {
                        list($tag_name, $encoding) = $tagname_encoding_array;

                        // fill in default encoding type if not already present
                        if (isset($this->info[$comment_name]) && !isset($this->info[$comment_name]['encoding'])) {
                                $this->info[$comment_name]['encoding'] = $encoding;
                        }

                        // copy comments if key name set
                        if (!empty($this->info[$comment_name]['comments'])) {

                                foreach ($this->info[$comment_name]['comments'] as $tag_key => $valuearray) {
                                        foreach ($valuearray as $key => $value) {
                                                if (strlen(trim($value)) > 0) {
                                                        $this->info['tags'][trim($tag_name)][trim($tag_key)][] = $value; // do not trim!! Unicode characters will get mangled if trailing nulls are removed!
                                                }
                                        }
                                }

                                if (!isset($this->info['tags'][$tag_name])) {
                                        // comments are set but contain nothing but empty strings, so skip
                                        continue;
                                }

                                if ($this->option_tags_html) {
                                        foreach ($this->info['tags'][$tag_name] as $tag_key => $valuearray) {
                                                foreach ($valuearray as $key => $value) {
                                                        if (is_string($value)) {
                                                                //$this->info['tags_html'][$tag_name][$tag_key][$key] = getid3_lib::MultiByteCharString2HTML($value, $encoding);
                                                                $this->info['tags_html'][$tag_name][$tag_key][$key] = str_replace('&#0;', '', getid3_lib::MultiByteCharString2HTML($value, $encoding));
                                                        } else {
                                                                $this->info['tags_html'][$tag_name][$tag_key][$key] = $value;
                                                        }
                                                }
                                        }
                                }

                                $this->CharConvert($this->info['tags'][$tag_name], $encoding);           // only copy gets converted!
                        }

                }
                return true;
        }


        function getHashdata($algorithm) {
                switch ($algorithm) {
                        case 'md5':
                        case 'sha1':
                                break;

                        default:
                                return $this->error('bad algorithm "'.$algorithm.'" in getHashdata()');
                                break;
                }

                if ((@$this->info['fileformat'] == 'ogg') && (@$this->info['audio']['dataformat'] == 'vorbis')) {

                        // We cannot get an identical md5_data value for Ogg files where the comments
                        // span more than 1 Ogg page (compared to the same audio data with smaller
                        // comments) using the normal getID3() method of MD5'ing the data between the
                        // end of the comments and the end of the file (minus any trailing tags),
                        // because the page sequence numbers of the pages that the audio data is on
                        // do not match. Under normal circumstances, where comments are smaller than
                        // the nominal 4-8kB page size, then this is not a problem, but if there are
                        // very large comments, the only way around it is to strip off the comment
                        // tags with vorbiscomment and MD5 that file.
                        // This procedure must be applied to ALL Ogg files, not just the ones with
                        // comments larger than 1 page, because the below method simply MD5's the
                        // whole file with the comments stripped, not just the portion after the
                        // comments block (which is the standard getID3() method.

                        // The above-mentioned problem of comments spanning multiple pages and changing
                        // page sequence numbers likely happens for OggSpeex and OggFLAC as well, but
                        // currently vorbiscomment only works on OggVorbis files.

                        if ((bool) ini_get('safe_mode')) {

                                $this->info['warning'][] = 'Failed making system call to vorbiscomment.exe - '.$algorithm.'_data is incorrect - error returned: PHP running in Safe Mode (backtick operator not available)';
                                $this->info[$algorithm.'_data']  = false;

                        } else {

                                // Prevent user from aborting script
                                $old_abort = ignore_user_abort(true);

                                // Create empty file
                                $empty = tempnam('*', 'getID3');
                                touch($empty);


                                // Use vorbiscomment to make temp file without comments
                                $temp = tempnam('*', 'getID3');
                                $file = $this->info['filenamepath'];

                                if (GETID3_OS_ISWINDOWS) {

                                        if (file_exists(GETID3_HELPERAPPSDIR.'vorbiscomment.exe')) {

                                                $commandline = '"'.GETID3_HELPERAPPSDIR.'vorbiscomment.exe" -w -c "'.$empty.'" "'.$file.'" "'.$temp.'"';
                                                $VorbisCommentError = `$commandline`;

                                        } else {

                                                $VorbisCommentError = 'vorbiscomment.exe not found in '.GETID3_HELPERAPPSDIR;

                                        }

                                } else {

                                        $commandline = 'vorbiscomment -w -c "'.$empty.'" "'.$file.'" "'.$temp.'" 2>&1';
                                        $commandline = 'vorbiscomment -w -c '.escapeshellarg($empty).' '.escapeshellarg($file).' '.escapeshellarg($temp).' 2>&1';
                                        $VorbisCommentError = `$commandline`;

                                }

                                if (!empty($VorbisCommentError)) {

                                        $this->info['warning'][]         = 'Failed making system call to vorbiscomment(.exe) - '.$algorithm.'_data will be incorrect. If vorbiscomment is unavailable, please download from http://www.vorbis.com/download.psp and put in the getID3() directory. Error returned: '.$VorbisCommentError;
                                        $this->info[$algorithm.'_data']  = false;

                                } else {

                                        // Get hash of newly created file
                                        switch ($algorithm) {
                                                case 'md5':
                                                        $this->info[$algorithm.'_data'] = getid3_lib::md5_file($temp);
                                                        break;

                                                case 'sha1':
                                                        $this->info[$algorithm.'_data'] = getid3_lib::sha1_file($temp);
                                                        break;
                                        }
                                }

                                // Clean up
                                unlink($empty);
                                unlink($temp);

                                // Reset abort setting
                                ignore_user_abort($old_abort);

                        }

                } else {

                        if (!empty($this->info['avdataoffset']) || (isset($this->info['avdataend']) && ($this->info['avdataend'] < $this->info['filesize']))) {

                                // get hash from part of file
                                $this->info[$algorithm.'_data'] = getid3_lib::hash_data($this->info['filenamepath'], $this->info['avdataoffset'], $this->info['avdataend'], $algorithm);

                        } else {

                                // get hash from whole file
                                switch ($algorithm) {
                                        case 'md5':
                                                $this->info[$algorithm.'_data'] = getid3_lib::md5_file($this->info['filenamepath']);
                                                break;

                                        case 'sha1':
                                                $this->info[$algorithm.'_data'] = getid3_lib::sha1_file($this->info['filenamepath']);
                                                break;
                                }
                        }

                }
                return true;
        }


        function ChannelsBitratePlaytimeCalculations() {

                // set channelmode on audio
                if (@$this->info['audio']['channels'] == '1') {
                        $this->info['audio']['channelmode'] = 'mono';
                } elseif (@$this->info['audio']['channels'] == '2') {
                        $this->info['audio']['channelmode'] = 'stereo';
                }

                // Calculate combined bitrate - audio + video
                $CombinedBitrate  = 0;
                $CombinedBitrate += (isset($this->info['audio']['bitrate']) ? $this->info['audio']['bitrate'] : 0);
                $CombinedBitrate += (isset($this->info['video']['bitrate']) ? $this->info['video']['bitrate'] : 0);
                if (($CombinedBitrate > 0) && empty($this->info['bitrate'])) {
                        $this->info['bitrate'] = $CombinedBitrate;
                }
                //if ((isset($this->info['video']) && !isset($this->info['video']['bitrate'])) || (isset($this->info['audio']) && !isset($this->info['audio']['bitrate']))) {
                //      // for example, VBR MPEG video files cannot determine video bitrate:
                //      // should not set overall bitrate and playtime from audio bitrate only
                //      unset($this->info['bitrate']);
                //}

                if (!isset($this->info['playtime_seconds']) && !empty($this->info['bitrate'])) {
                        $this->info['playtime_seconds'] = (($this->info['avdataend'] - $this->info['avdataoffset']) * 8) / $this->info['bitrate'];
                }

                // Set playtime string
                if (!empty($this->info['playtime_seconds']) && empty($this->info['playtime_string'])) {
                        $this->info['playtime_string'] = getid3_lib::PlaytimeString($this->info['playtime_seconds']);
                }
        }


        function CalculateCompressionRatioVideo() {
                if (empty($this->info['video'])) {
                        return false;
                }
                if (empty($this->info['video']['resolution_x']) || empty($this->info['video']['resolution_y'])) {
                        return false;
                }
                if (empty($this->info['video']['bits_per_sample'])) {
                        return false;
                }

                switch ($this->info['video']['dataformat']) {
                        case 'bmp':
                        case 'gif':
                        case 'jpeg':
                        case 'jpg':
                        case 'png':
                        case 'tiff':
                                $FrameRate = 1;
                                $PlaytimeSeconds = 1;
                                $BitrateCompressed = $this->info['filesize'] * 8;
                                break;

                        default:
                                if (!empty($this->info['video']['frame_rate'])) {
                                        $FrameRate = $this->info['video']['frame_rate'];
                                } else {
                                        return false;
                                }
                                if (!empty($this->info['playtime_seconds'])) {
                                        $PlaytimeSeconds = $this->info['playtime_seconds'];
                                } else {
                                        return false;
                                }
                                if (!empty($this->info['video']['bitrate'])) {
                                        $BitrateCompressed = $this->info['video']['bitrate'];
                                } else {
                                        return false;
                                }
                                break;
                }
                $BitrateUncompressed = $this->info['video']['resolution_x'] * $this->info['video']['resolution_y'] * $this->info['video']['bits_per_sample'] * $FrameRate;

                $this->info['video']['compression_ratio'] = $BitrateCompressed / $BitrateUncompressed;
                return true;
        }


        function CalculateCompressionRatioAudio() {
                if (empty($this->info['audio']['bitrate']) || empty($this->info['audio']['channels']) || empty($this->info['audio']['sample_rate'])) {
                        return false;
                }
                $this->info['audio']['compression_ratio'] = $this->info['audio']['bitrate'] / ($this->info['audio']['channels'] * $this->info['audio']['sample_rate'] * (!empty($this->info['audio']['bits_per_sample']) ? $this->info['audio']['bits_per_sample'] : 16));

                if (!empty($this->info['audio']['streams'])) {
                        foreach ($this->info['audio']['streams'] as $streamnumber => $streamdata) {
                                if (!empty($streamdata['bitrate']) && !empty($streamdata['channels']) && !empty($streamdata['sample_rate'])) {
                                        $this->info['audio']['streams'][$streamnumber]['compression_ratio'] = $streamdata['bitrate'] / ($streamdata['channels'] * $streamdata['sample_rate'] * (!empty($streamdata['bits_per_sample']) ? $streamdata['bits_per_sample'] : 16));
                                }
                        }
                }
                return true;
        }


        function CalculateReplayGain() {
                if (isset($this->info['replay_gain'])) {
                        $this->info['replay_gain']['reference_volume'] = 89;
                        if (isset($this->info['replay_gain']['track']['adjustment'])) {
                                $this->info['replay_gain']['track']['volume'] = $this->info['replay_gain']['reference_volume'] - $this->info['replay_gain']['track']['adjustment'];
                        }
                        if (isset($this->info['replay_gain']['album']['adjustment'])) {
                                $this->info['replay_gain']['album']['volume'] = $this->info['replay_gain']['reference_volume'] - $this->info['replay_gain']['album']['adjustment'];
                        }

                        if (isset($this->info['replay_gain']['track']['peak'])) {
                                $this->info['replay_gain']['track']['max_noclip_gain'] = 0 - getid3_lib::RGADamplitude2dB($this->info['replay_gain']['track']['peak']);
                        }
                        if (isset($this->info['replay_gain']['album']['peak'])) {
                                $this->info['replay_gain']['album']['max_noclip_gain'] = 0 - getid3_lib::RGADamplitude2dB($this->info['replay_gain']['album']['peak']);
                        }
                }
                return true;
        }

        function ProcessAudioStreams() {
                if (!empty($this->info['audio']['bitrate']) || !empty($this->info['audio']['channels']) || !empty($this->info['audio']['sample_rate'])) {
                        if (!isset($this->info['audio']['streams'])) {
                                foreach ($this->info['audio'] as $key => $value) {
                                        if ($key != 'streams') {
                                                $this->info['audio']['streams'][0][$key] = $value;
                                        }
                                }
                        }
                }
                return true;
        }

        function getid3_tempnam() {
                return tempnam($this->tempdir, 'gI3');
        }

}

?>