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File: includes/getid3/module.audio.bonk.php

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  Classes of Karl Holz  >  WaldScan  >  includes/getid3/module.audio.bonk.php  >  Download  
File: includes/getid3/module.audio.bonk.php
Role: Auxiliary script
Content type: text/plain
Description: getID3 dependency
Class: WaldScan
Scan directories for files with certain extensions
Author: By
Last change:
Date: 1 year ago
Size: 9,428 bytes
 

Contents

Class file image Download
<?php
/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org>               //
//  available at http://getid3.sourceforge.net                 //
//            or http://www.getid3.org                         //
/////////////////////////////////////////////////////////////////
// See readme.txt for more details                             //
/////////////////////////////////////////////////////////////////
//                                                             //
// module.audio.la.php                                         //
// module for analyzing BONK audio files                       //
// dependencies: module.tag.id3v2.php (optional)               //
//                                                            ///
/////////////////////////////////////////////////////////////////


class getid3_bonk extends getid3_handler
{
    function 
Analyze() {
        
$info = &$this->getid3->info;

        
// shortcut
        
$info['bonk'] = array();
        
$thisfile_bonk        = &$info['bonk'];

        
$thisfile_bonk['dataoffset'] = $info['avdataoffset'];
        
$thisfile_bonk['dataend']    = $info['avdataend'];

        if (!
getid3_lib::intValueSupported($thisfile_bonk['dataend'])) {

            
$info['warning'][] = 'Unable to parse BONK file from end (v0.6+ preferred method) because PHP filesystem functions only support up to '.round(PHP_INT_MAX 1073741824).'GB';

        } else {

            
// scan-from-end method, for v0.6 and higher
            
fseek($this->getid3->fp$thisfile_bonk['dataend'] - 8SEEK_SET);
            
$PossibleBonkTag fread($this->getid3->fp8);
            while (
$this->BonkIsValidTagName(substr($PossibleBonkTag44), true)) {
                
$BonkTagSize getid3_lib::LittleEndian2Int(substr($PossibleBonkTag04));
                
fseek($this->getid3->fp$BonkTagSizeSEEK_CUR);
                
$BonkTagOffset ftell($this->getid3->fp);
                
$TagHeaderTest fread($this->getid3->fp5);
                if ((
$TagHeaderTest{0} != "\x00") || (substr($PossibleBonkTag44) != strtolower(substr($PossibleBonkTag44)))) {
                    
$info['error'][] = 'Expecting "'.getid3_lib::PrintHexBytes("\x00".strtoupper(substr($PossibleBonkTag44))).'" at offset '.$BonkTagOffset.', found "'.getid3_lib::PrintHexBytes($TagHeaderTest).'"';
                    return 
false;
                }
                
$BonkTagName substr($TagHeaderTest14);

                
$thisfile_bonk[$BonkTagName]['size']   = $BonkTagSize;
                
$thisfile_bonk[$BonkTagName]['offset'] = $BonkTagOffset;
                
$this->HandleBonkTags($BonkTagName);
                
$NextTagEndOffset $BonkTagOffset 8;
                if (
$NextTagEndOffset $thisfile_bonk['dataoffset']) {
                    if (empty(
$info['audio']['encoder'])) {
                        
$info['audio']['encoder'] = 'Extended BONK v0.9+';
                    }
                    return 
true;
                }
                
fseek($this->getid3->fp$NextTagEndOffsetSEEK_SET);
                
$PossibleBonkTag fread($this->getid3->fp8);
            }

        }

        
// seek-from-beginning method for v0.4 and v0.5
        
if (empty($thisfile_bonk['BONK'])) {
            
fseek($this->getid3->fp$thisfile_bonk['dataoffset'], SEEK_SET);
            do {
                
$TagHeaderTest fread($this->getid3->fp5);
                switch (
$TagHeaderTest) {
                    case 
"\x00".'BONK':
                        if (empty(
$info['audio']['encoder'])) {
                            
$info['audio']['encoder'] = 'BONK v0.4';
                        }
                        break;

                    case 
"\x00".'INFO':
                        
$info['audio']['encoder'] = 'Extended BONK v0.5';
                        break;

                    default:
                        break 
2;
                }
                
$BonkTagName substr($TagHeaderTest14);
                
$thisfile_bonk[$BonkTagName]['size']   = $thisfile_bonk['dataend'] - $thisfile_bonk['dataoffset'];
                
$thisfile_bonk[$BonkTagName]['offset'] = $thisfile_bonk['dataoffset'];
                
$this->HandleBonkTags($BonkTagName);

            } while (
true);
        }

        
// parse META block for v0.6 - v0.8
        
if (empty($thisfile_bonk['INFO']) && isset($thisfile_bonk['META']['tags']['info'])) {
            
fseek($this->getid3->fp$thisfile_bonk['META']['tags']['info'], SEEK_SET);
            
$TagHeaderTest fread($this->getid3->fp5);
            if (
$TagHeaderTest == "\x00".'INFO') {
                
$info['audio']['encoder'] = 'Extended BONK v0.6 - v0.8';

                
$BonkTagName substr($TagHeaderTest14);
                
$thisfile_bonk[$BonkTagName]['size']   = $thisfile_bonk['dataend'] - $thisfile_bonk['dataoffset'];
                
$thisfile_bonk[$BonkTagName]['offset'] = $thisfile_bonk['dataoffset'];
                
$this->HandleBonkTags($BonkTagName);
            }
        }

        if (empty(
$info['audio']['encoder'])) {
            
$info['audio']['encoder'] = 'Extended BONK v0.9+';
        }
        if (empty(
$thisfile_bonk['BONK'])) {
            unset(
$info['bonk']);
        }
        return 
true;

    }

    function 
HandleBonkTags($BonkTagName) {
        
$info = &$this->getid3->info;
        switch (
$BonkTagName) {
            case 
'BONK':
                
// shortcut
                
$thisfile_bonk_BONK = &$info['bonk']['BONK'];

                
$BonkData "\x00".'BONK'.fread($this->getid3->fp17);
                
$thisfile_bonk_BONK['version']            =        getid3_lib::LittleEndian2Int(substr($BonkData,  51));
                
$thisfile_bonk_BONK['number_samples']     =        getid3_lib::LittleEndian2Int(substr($BonkData,  64));
                
$thisfile_bonk_BONK['sample_rate']        =        getid3_lib::LittleEndian2Int(substr($BonkData104));

                
$thisfile_bonk_BONK['channels']           =        getid3_lib::LittleEndian2Int(substr($BonkData141));
                
$thisfile_bonk_BONK['lossless']           = (bool) getid3_lib::LittleEndian2Int(substr($BonkData151));
                
$thisfile_bonk_BONK['joint_stereo']       = (bool) getid3_lib::LittleEndian2Int(substr($BonkData161));
                
$thisfile_bonk_BONK['number_taps']        =        getid3_lib::LittleEndian2Int(substr($BonkData172));
                
$thisfile_bonk_BONK['downsampling_ratio'] =        getid3_lib::LittleEndian2Int(substr($BonkData191));
                
$thisfile_bonk_BONK['samples_per_packet'] =        getid3_lib::LittleEndian2Int(substr($BonkData202));

                
$info['avdataoffset'] = $thisfile_bonk_BONK['offset'] + 17;
                
$info['avdataend']    = $thisfile_bonk_BONK['offset'] + $thisfile_bonk_BONK['size'];

                
$info['fileformat']               = 'bonk';
                
$info['audio']['dataformat']      = 'bonk';
                
$info['audio']['bitrate_mode']    = 'vbr'// assumed
                
$info['audio']['channels']        = $thisfile_bonk_BONK['channels'];
                
$info['audio']['sample_rate']     = $thisfile_bonk_BONK['sample_rate'];
                
$info['audio']['channelmode']     = ($thisfile_bonk_BONK['joint_stereo'] ? 'joint stereo' 'stereo');
                
$info['audio']['lossless']        = $thisfile_bonk_BONK['lossless'];
                
$info['audio']['codec']           = 'bonk';

                
$info['playtime_seconds'] = $thisfile_bonk_BONK['number_samples'] / ($thisfile_bonk_BONK['sample_rate'] * $thisfile_bonk_BONK['channels']);
                if (
$info['playtime_seconds'] > 0) {
                    
$info['audio']['bitrate'] = (($info['bonk']['dataend'] - $info['bonk']['dataoffset']) * 8) / $info['playtime_seconds'];
                }
                break;

            case 
'INFO':
                
// shortcut
                
$thisfile_bonk_INFO = &$info['bonk']['INFO'];

                
$thisfile_bonk_INFO['version'] = getid3_lib::LittleEndian2Int(fread($this->getid3->fp1));
                
$thisfile_bonk_INFO['entries_count'] = 0;
                
$NextInfoDataPair fread($this->getid3->fp5);
                if (!
$this->BonkIsValidTagName(substr($NextInfoDataPair14))) {
                    while (!
feof($this->getid3->fp)) {
                        
//$CurrentSeekInfo['offset']  = getid3_lib::LittleEndian2Int(substr($NextInfoDataPair, 0, 4));
                        //$CurrentSeekInfo['nextbit'] = getid3_lib::LittleEndian2Int(substr($NextInfoDataPair, 4, 1));
                        //$thisfile_bonk_INFO[] = $CurrentSeekInfo;

                        
$NextInfoDataPair fread($this->getid3->fp5);
                        if (
$this->BonkIsValidTagName(substr($NextInfoDataPair14))) {
                            
fseek($this->getid3->fp, -5SEEK_CUR);
                            break;
                        }
                        
$thisfile_bonk_INFO['entries_count']++;
                    }
                }
                break;

            case 
'META':
                
$BonkData "\x00".'META'.fread($this->getid3->fp$info['bonk']['META']['size'] - 5);
                
$info['bonk']['META']['version'] = getid3_lib::LittleEndian2Int(substr($BonkData,  51));

                
$MetaTagEntries floor(((strlen($BonkData) - 8) - 6) / 8); // BonkData - xxxxmeta - ØMETA
                
$offset 6;
                for (
$i 0$i $MetaTagEntries$i++) {
                    
$MetaEntryTagName   =                              substr($BonkData$offset4);
                    
$offset += 4;
                    
$MetaEntryTagOffset getid3_lib::LittleEndian2Int(substr($BonkData$offset4));
                    
$offset += 4;
                    
$info['bonk']['META']['tags'][$MetaEntryTagName] = $MetaEntryTagOffset;
                }
                break;

            case 
' ID3':
                
$info['audio']['encoder'] = 'Extended BONK v0.9+';

                
// ID3v2 checking is optional
                
if (class_exists('getid3_id3v2')) {
                    
$getid3_temp = new getID3();
                    
$getid3_temp->openfile($this->getid3->filename);
                    
$getid3_id3v2 = new getid3_id3v2($getid3_temp);
                    
$getid3_id3v2->StartingOffset $info['bonk'][' ID3']['offset'] + 2;
                    
$info['bonk'][' ID3']['valid'] = $getid3_id3v2->Analyze();
                    if (
$info['bonk'][' ID3']['valid']) {
                        
$info['id3v2'] = $getid3_temp->info['id3v2'];
                    }
                    unset(
$getid3_temp$getid3_id3v2);
                }
                break;

            default:
                
$info['warning'][] = 'Unexpected Bonk tag "'.$BonkTagName.'" at offset '.$info['bonk'][$BonkTagName]['offset'];
                break;

        }
    }

    static function 
BonkIsValidTagName($PossibleBonkTag$ignorecase=false) {
        static 
$BonkIsValidTagName = array('BONK''INFO'' ID3''META');
        foreach (
$BonkIsValidTagName as $validtagname) {
            if (
$validtagname == $PossibleBonkTag) {
                return 
true;
            } elseif (
$ignorecase && (strtolower($validtagname) == strtolower($PossibleBonkTag))) {
                return 
true;
            }
        }
        return 
false;
    }

}


?>