1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/e2gallerypro/e2upload/Backend/Assets/getid3/module.audio.la.php	Mon Feb 22 08:02:39 2010 -0500
     1.3 @@ -0,0 +1,196 @@
     1.4 +<?php
     1.5 +// +----------------------------------------------------------------------+
     1.6 +// | PHP version 5                                                        |
     1.7 +// +----------------------------------------------------------------------+
     1.8 +// | Copyright (c) 2002-2006 James Heinrich, Allan Hansen                 |
     1.9 +// +----------------------------------------------------------------------+
    1.10 +// | This source file is subject to version 2 of the GPL license,         |
    1.11 +// | that is bundled with this package in the file license.txt and is     |
    1.12 +// | available through the world-wide-web at the following url:           |
    1.13 +// | http://www.gnu.org/copyleft/gpl.html                                 |
    1.14 +// +----------------------------------------------------------------------+
    1.15 +// | getID3() - http://getid3.sourceforge.net or http://www.getid3.org    |
    1.16 +// +----------------------------------------------------------------------+
    1.17 +// | Authors: James Heinrich <infoØgetid3*org>                            |
    1.18 +// |          Allan Hansen <ahØartemis*dk>                                |
    1.19 +// +----------------------------------------------------------------------+
    1.20 +// | module.audio.la.php                                                  |
    1.21 +// | Module for analyzing LA udio files                                   |
    1.22 +// | dependencies: module.audio-video.riff.php                            |
    1.23 +// +----------------------------------------------------------------------+
    1.24 +//
    1.25 +// $Id: module.audio.la.php,v 1.2 2006/11/02 10:48:01 ah Exp $
    1.26 +
    1.27 +        
    1.28 +        
    1.29 +class getid3_la extends getid3_handler
    1.30 +{
    1.31 +
    1.32 +    public function Analyze() {
    1.33 +        
    1.34 +        $getid3 = $this->getid3;
    1.35 +        
    1.36 +        $getid3->include_module('audio-video.riff');
    1.37 +        
    1.38 +        fseek($getid3->fp, $getid3->info['avdataoffset'], SEEK_SET);
    1.39 +        $raw_data = fread($getid3->fp, getid3::FREAD_BUFFER_SIZE);
    1.40 +    
    1.41 +        $getid3->info['fileformat']          = 'la';
    1.42 +        $getid3->info['audio']['dataformat'] = 'la';
    1.43 +        $getid3->info['audio']['lossless']   = true;
    1.44 +
    1.45 +        $getid3->info['la']['version_major'] = (int)$raw_data{2};
    1.46 +        $getid3->info['la']['version_minor'] = (int)$raw_data{3};
    1.47 +        $getid3->info['la']['version']       = (float)$getid3->info['la']['version_major'] + ($getid3->info['la']['version_minor'] / 10);
    1.48 +
    1.49 +        $getid3->info['la']['uncompressed_size'] = getid3_lib::LittleEndian2Int(substr($raw_data, 4, 4));
    1.50 +        
    1.51 +        $wave_chunk = substr($raw_data, 8, 4);
    1.52 +        if ($wave_chunk !== 'WAVE') {
    1.53 +            throw new getid3_exception('Expected "WAVE" ('.getid3_lib::PrintHexBytes('WAVE').') at offset 8, found "'.$wave_chunk.'" ('.getid3_lib::PrintHexBytes($wave_chunk).') instead.');
    1.54 +        }
    1.55 +        
    1.56 +        $offset = 12;
    1.57 +
    1.58 +        $getid3->info['la']['fmt_size'] = 24;
    1.59 +        if ($getid3->info['la']['version'] >= 0.3) {
    1.60 +
    1.61 +            $getid3->info['la']['fmt_size']    = getid3_lib::LittleEndian2Int(substr($raw_data, $offset, 4));
    1.62 +            $getid3->info['la']['header_size'] = 49 + $getid3->info['la']['fmt_size'] - 24;
    1.63 +            $offset += 4;
    1.64 +
    1.65 +        } else {
    1.66 +
    1.67 +            // version 0.2 didn't support additional data blocks
    1.68 +            $getid3->info['la']['header_size'] = 41;
    1.69 +        }
    1.70 +
    1.71 +        $fmt_chunk = substr($raw_data, $offset, 4);
    1.72 +        if ($fmt_chunk !== 'fmt ') {
    1.73 +            throw new getid3_exception('Expected "fmt " ('.getid3_lib::PrintHexBytes('fmt ').') at offset '.$offset.', found "'.$fmt_chunk.'" ('.getid3_lib::PrintHexBytes($fmt_chunk).') instead.');
    1.74 +        }
    1.75 +        $offset += 4;
    1.76 +        
    1.77 +        $fmt_size = getid3_lib::LittleEndian2Int(substr($raw_data, $offset, 4));
    1.78 +        $offset += 4;
    1.79 +
    1.80 +        $getid3->info['la']['raw']['format'] = getid3_lib::LittleEndian2Int(substr($raw_data, $offset, 2));
    1.81 +        $offset += 2;
    1.82 +        
    1.83 +        getid3_lib::ReadSequence('LittleEndian2Int', $getid3->info['la'], $raw_data, $offset,
    1.84 +            array (
    1.85 +                'channels'         => 2,
    1.86 +                'sample_rate'      => 4,
    1.87 +                'bytes_per_second' => 4,
    1.88 +                'bytes_per_sample' => 2,
    1.89 +                'bits_per_sample'  => 2,
    1.90 +                'samples'          => 4
    1.91 +            )
    1.92 +        );
    1.93 +        $offset += 18;
    1.94 +        
    1.95 +        $getid3->info['la']['raw']['flags'] = getid3_lib::LittleEndian2Int($raw_data{$offset++});
    1.96 +        
    1.97 +        $getid3->info['la']['flags']['seekable']             = (bool)($getid3->info['la']['raw']['flags'] & 0x01);
    1.98 +        if ($getid3->info['la']['version'] >= 0.4) {
    1.99 +            $getid3->info['la']['flags']['high_compression'] = (bool)($getid3->info['la']['raw']['flags'] & 0x02);
   1.100 +        }
   1.101 +
   1.102 +        $getid3->info['la']['original_crc'] = getid3_lib::LittleEndian2Int(substr($raw_data, $offset, 4));
   1.103 +        $offset += 4;
   1.104 +
   1.105 +        // mikeØbevin*de
   1.106 +        // Basically, the blocksize/seekevery are 61440/19 in La0.4 and 73728/16
   1.107 +        // in earlier versions. A seekpoint is added every blocksize * seekevery
   1.108 +        // samples, so 4 * int(totalSamples / (blockSize * seekEvery)) should
   1.109 +        // give the number of bytes used for the seekpoints. Of course, if seeking
   1.110 +        // is disabled, there are no seekpoints stored.
   1.111 +        
   1.112 +        if ($getid3->info['la']['version'] >= 0.4) {
   1.113 +            $getid3->info['la']['blocksize'] = 61440;
   1.114 +            $getid3->info['la']['seekevery'] = 19;
   1.115 +        } else {
   1.116 +            $getid3->info['la']['blocksize'] = 73728;
   1.117 +            $getid3->info['la']['seekevery'] = 16;
   1.118 +        }
   1.119 +
   1.120 +        $getid3->info['la']['seekpoint_count'] = 0;
   1.121 +        if ($getid3->info['la']['flags']['seekable']) {
   1.122 +            $getid3->info['la']['seekpoint_count'] = floor($getid3->info['la']['samples'] / ($getid3->info['la']['blocksize'] * $getid3->info['la']['seekevery']));
   1.123 +
   1.124 +            for ($i = 0; $i < $getid3->info['la']['seekpoint_count']; $i++) {
   1.125 +                $getid3->info['la']['seekpoints'][] = getid3_lib::LittleEndian2Int(substr($raw_data, $offset, 4));
   1.126 +                $offset += 4;
   1.127 +            }
   1.128 +        }
   1.129 +
   1.130 +        if ($getid3->info['la']['version'] >= 0.3) {
   1.131 +
   1.132 +            // Following the main header information, the program outputs all of the
   1.133 +            // seekpoints. Following these is what I called the 'footer start',
   1.134 +            // i.e. the position immediately after the La audio data is finished.
   1.135 +        
   1.136 +            $getid3->info['la']['footerstart'] = getid3_lib::LittleEndian2Int(substr($raw_data, $offset, 4));
   1.137 +            $offset += 4;
   1.138 +
   1.139 +            if ($getid3->info['la']['footerstart'] > $getid3->info['filesize']) {
   1.140 +                $getid3->warning('FooterStart value points to offset '.$getid3->info['la']['footerstart'].' which is beyond end-of-file ('.$getid3->info['filesize'].')');
   1.141 +                $getid3->info['la']['footerstart'] = $getid3->info['filesize'];
   1.142 +            }
   1.143 +
   1.144 +        } else {
   1.145 +
   1.146 +            // La v0.2 didn't have FooterStart value
   1.147 +            $getid3->info['la']['footerstart'] = $getid3->info['avdataend'];
   1.148 +
   1.149 +        }
   1.150 +
   1.151 +        if ($getid3->info['la']['footerstart'] < $getid3->info['avdataend']) {
   1.152 +        
   1.153 +            // Create riff header
   1.154 +            $riff_data = 'WAVE';
   1.155 +            if ($getid3->info['la']['version'] == 0.2) {
   1.156 +                $riff_data .= substr($raw_data, 12, 24);
   1.157 +            } else {
   1.158 +                $riff_data .= substr($raw_data, 16, 24);
   1.159 +            }
   1.160 +            if ($getid3->info['la']['footerstart'] < $getid3->info['avdataend']) {
   1.161 +                fseek($getid3->fp, $getid3->info['la']['footerstart'], SEEK_SET);
   1.162 +                $riff_data .= fread($getid3->fp, $getid3->info['avdataend'] - $getid3->info['la']['footerstart']);
   1.163 +            }
   1.164 +            $riff_data = 'RIFF'.getid3_lib::LittleEndian2String(strlen($riff_data), 4, false).$riff_data;
   1.165 +            
   1.166 +            // Clone getid3 - messing with offsets - better safe than sorry
   1.167 +            $clone = clone $getid3;
   1.168 +            
   1.169 +            // Analyze clone by string
   1.170 +            $riff = new getid3_riff($clone);
   1.171 +            $riff->AnalyzeString($riff_data);
   1.172 +            
   1.173 +            // Import from clone and destroy
   1.174 +            $getid3->info['riff']   = $clone->info['riff'];
   1.175 +            $getid3->warnings($clone->warnings());
   1.176 +            unset($clone);
   1.177 +        }
   1.178 +
   1.179 +        // $getid3->info['avdataoffset'] should be zero to begin with, but just in case it's not, include the addition anyway
   1.180 +        $getid3->info['avdataend']    = $getid3->info['avdataoffset'] + $getid3->info['la']['footerstart'];
   1.181 +        $getid3->info['avdataoffset'] = $getid3->info['avdataoffset'] + $offset;
   1.182 +
   1.183 +        $getid3->info['la']['compression_ratio']  = (float)(($getid3->info['avdataend'] - $getid3->info['avdataoffset']) / $getid3->info['la']['uncompressed_size']);
   1.184 +        $getid3->info['playtime_seconds']         = (float)($getid3->info['la']['samples'] / $getid3->info['la']['sample_rate']) / $getid3->info['la']['channels'];
   1.185 +
   1.186 +        $getid3->info['audio']['bitrate']         = ($getid3->info['avdataend'] - $getid3->info['avdataoffset']) * 8 / $getid3->info['playtime_seconds'];
   1.187 +        $getid3->info['audio']['bits_per_sample'] = $getid3->info['la']['bits_per_sample'];
   1.188 +
   1.189 +        $getid3->info['audio']['channels']        = $getid3->info['la']['channels'];
   1.190 +        $getid3->info['audio']['sample_rate']     = (int)$getid3->info['la']['sample_rate'];
   1.191 +        $getid3->info['audio']['encoder']         = 'LA v'.$getid3->info['la']['version'];
   1.192 +
   1.193 +        return true;
   1.194 +    }
   1.195 +
   1.196 +}
   1.197 +
   1.198 +
   1.199 +?>
   1.200 \ No newline at end of file