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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: 2 years 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'] - 8, SEEK_SET);
           
$PossibleBonkTag = fread($this->getid3->fp, 8);
            while (
$this->BonkIsValidTagName(substr($PossibleBonkTag, 4, 4), true)) {
               
$BonkTagSize = getid3_lib::LittleEndian2Int(substr($PossibleBonkTag, 0, 4));
               
fseek($this->getid3->fp, 0 - $BonkTagSize, SEEK_CUR);
               
$BonkTagOffset = ftell($this->getid3->fp);
               
$TagHeaderTest = fread($this->getid3->fp, 5);
                if ((
$TagHeaderTest{0} != "\x00") || (substr($PossibleBonkTag, 4, 4) != strtolower(substr($PossibleBonkTag, 4, 4)))) {
                   
$info['error'][] = 'Expecting "'.getid3_lib::PrintHexBytes("\x00".strtoupper(substr($PossibleBonkTag, 4, 4))).'" at offset '.$BonkTagOffset.', found "'.getid3_lib::PrintHexBytes($TagHeaderTest).'"';
                    return
false;
                }
               
$BonkTagName = substr($TagHeaderTest, 1, 4);

               
$thisfile_bonk[$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, $NextTagEndOffset, SEEK_SET);
               
$PossibleBonkTag = fread($this->getid3->fp, 8);
            }

        }

       
// 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->fp, 5);
                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;
                }
               
$BonkTagName = substr($TagHeaderTest, 1, 4);
               
$thisfile_bonk[$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->fp, 5);
            if (
$TagHeaderTest == "\x00".'INFO') {
               
$info['audio']['encoder'] = 'Extended BONK v0.6 - v0.8';

               
$BonkTagName = substr($TagHeaderTest, 1, 4);
               
$thisfile_bonk[$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->fp, 17);
               
$thisfile_bonk_BONK['version'] = getid3_lib::LittleEndian2Int(substr($BonkData, 5, 1));
               
$thisfile_bonk_BONK['number_samples'] = getid3_lib::LittleEndian2Int(substr($BonkData, 6, 4));
               
$thisfile_bonk_BONK['sample_rate'] = getid3_lib::LittleEndian2Int(substr($BonkData, 10, 4));

               
$thisfile_bonk_BONK['channels'] = getid3_lib::LittleEndian2Int(substr($BonkData, 14, 1));
               
$thisfile_bonk_BONK['lossless'] = (bool) getid3_lib::LittleEndian2Int(substr($BonkData, 15, 1));
               
$thisfile_bonk_BONK['joint_stereo'] = (bool) getid3_lib::LittleEndian2Int(substr($BonkData, 16, 1));
               
$thisfile_bonk_BONK['number_taps'] = getid3_lib::LittleEndian2Int(substr($BonkData, 17, 2));
               
$thisfile_bonk_BONK['downsampling_ratio'] = getid3_lib::LittleEndian2Int(substr($BonkData, 19, 1));
               
$thisfile_bonk_BONK['samples_per_packet'] = getid3_lib::LittleEndian2Int(substr($BonkData, 20, 2));

               
$info['avdataoffset'] = $thisfile_bonk_BONK['offset'] + 5 + 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->fp, 1));
               
$thisfile_bonk_INFO['entries_count'] = 0;
               
$NextInfoDataPair = fread($this->getid3->fp, 5);
                if (!
$this->BonkIsValidTagName(substr($NextInfoDataPair, 1, 4))) {
                    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->fp, 5);
                        if (
$this->BonkIsValidTagName(substr($NextInfoDataPair, 1, 4))) {
                           
fseek($this->getid3->fp, -5, SEEK_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, 5, 1));

               
$MetaTagEntries = floor(((strlen($BonkData) - 8) - 6) / 8); // BonkData - xxxxmeta - ØMETA
               
$offset = 6;
                for (
$i = 0; $i < $MetaTagEntries; $i++) {
                   
$MetaEntryTagName = substr($BonkData, $offset, 4);
                   
$offset += 4;
                   
$MetaEntryTagOffset = getid3_lib::LittleEndian2Int(substr($BonkData, $offset, 4));
                   
$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;
    }

}


?>