diff options
Diffstat (limited to 'includes/getid3/module.audio.bonk.php')
| -rw-r--r-- | includes/getid3/module.audio.bonk.php | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/includes/getid3/module.audio.bonk.php b/includes/getid3/module.audio.bonk.php new file mode 100644 index 0000000..c6cf9ac --- /dev/null +++ b/includes/getid3/module.audio.bonk.php @@ -0,0 +1,243 @@ +<?php + +///////////////////////////////////////////////////////////////// +/// getID3() by James Heinrich <info@getid3.org> // +// available at https://github.com/JamesHeinrich/getID3 // +// or https://www.getid3.org // +// or http://getid3.sourceforge.net // +// see readme.txt for more details // +///////////////////////////////////////////////////////////////// +// // +// module.audio.la.php // +// module for analyzing BONK audio files // +// dependencies: module.tag.id3v2.php (optional) // +// /// +///////////////////////////////////////////////////////////////// + +if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers + exit; +} + +class getid3_bonk extends getid3_handler +{ + /** + * @return bool + */ + public 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'])) { + + $this->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 + $this->fseek($thisfile_bonk['dataend'] - 8); + $PossibleBonkTag = $this->fread(8); + while ($this->BonkIsValidTagName(substr($PossibleBonkTag, 4, 4), true)) { + $BonkTagSize = getid3_lib::LittleEndian2Int(substr($PossibleBonkTag, 0, 4)); + $this->fseek(0 - $BonkTagSize, SEEK_CUR); + $BonkTagOffset = $this->ftell(); + $TagHeaderTest = $this->fread(5); + if (($TagHeaderTest[0] != "\x00") || (substr($PossibleBonkTag, 4, 4) != strtolower(substr($PossibleBonkTag, 4, 4)))) { + $this->error('Expecting "'.getid3_lib::PrintHexBytes("\x00".strtoupper(substr($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; + } + $this->fseek($NextTagEndOffset); + $PossibleBonkTag = $this->fread(8); + } + + } + + // seek-from-beginning method for v0.4 and v0.5 + if (empty($thisfile_bonk['BONK'])) { + $this->fseek($thisfile_bonk['dataoffset']); + do { + $TagHeaderTest = $this->fread(5); + switch ($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'])) { + $this->fseek($thisfile_bonk['META']['tags']['info']); + $TagHeaderTest = $this->fread(5); + if ($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; + + } + + /** + * @param string $BonkTagName + */ + public function HandleBonkTags($BonkTagName) { + $info = &$this->getid3->info; + switch ($BonkTagName) { + case 'BONK': + // shortcut + $thisfile_bonk_BONK = &$info['bonk']['BONK']; + + $BonkData = "\x00".'BONK'.$this->fread(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']; + + $thisfile_bonk_INFO['version'] = getid3_lib::LittleEndian2Int($this->fread(1)); + $thisfile_bonk_INFO['entries_count'] = 0; + $NextInfoDataPair = $this->fread(5); + if (!$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 = $this->fread(5); + if ($this->BonkIsValidTagName(substr($NextInfoDataPair, 1, 4))) { + $this->fseek(-5, SEEK_CUR); + break; + } + $thisfile_bonk_INFO['entries_count']++; + } + } + break; + + case 'META': + $BonkData = "\x00".'META'.$this->fread($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, $this->getid3->info['filesize'], $this->getid3->fp); + $getid3_id3v2 = new getid3_id3v2($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: + $this->warning('Unexpected Bonk tag "'.$BonkTagName.'" at offset '.$info['bonk'][$BonkTagName]['offset']); + break; + + } + } + + /** + * @param string $PossibleBonkTag + * @param bool $ignorecase + * + * @return bool + */ + public static function BonkIsValidTagName($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; + } + +} |