diff options
Diffstat (limited to 'getid3/module.audio.bonk.php')
| -rw-r--r-- | getid3/module.audio.bonk.php | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/getid3/module.audio.bonk.php b/getid3/module.audio.bonk.php new file mode 100644 index 0000000..fef9782 --- /dev/null +++ b/getid3/module.audio.bonk.php @@ -0,0 +1,221 @@ +<?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 +{ + function getid3_bonk(&$fd, &$ThisFileInfo) { + + // shortcut + $ThisFileInfo['bonk'] = array(); + $thisfile_bonk = &$ThisFileInfo['bonk']; + + $thisfile_bonk['dataoffset'] = $ThisFileInfo['avdataoffset']; + $thisfile_bonk['dataend'] = $ThisFileInfo['avdataend']; + + if ($thisfile_bonk['dataend'] >= pow(2, 31)) { + + $ThisFileInfo['warning'][] = 'Unable to parse BONK file from end (v0.6+ preferred method) because PHP filesystem functions only support up to 2GB'; + + } else { + + // scan-from-end method, for v0.6 and higher + fseek($fd, $thisfile_bonk['dataend'] - 8, SEEK_SET); + $PossibleBonkTag = fread($fd, 8); + while ($this->BonkIsValidTagName(substr($PossibleBonkTag, 4, 4), true)) { + $BonkTagSize = getid3_lib::LittleEndian2Int(substr($PossibleBonkTag, 0, 4)); + fseek($fd, 0 - $BonkTagSize, SEEK_CUR); + $BonkTagOffset = ftell($fd); + $TagHeaderTest = fread($fd, 5); + if (($TagHeaderTest{0} != "\x00") || (substr($PossibleBonkTag, 4, 4) != strtolower(substr($PossibleBonkTag, 4, 4)))) { + $ThisFileInfo['error'][] = 'Expecting "Ø'.strtoupper(substr($PossibleBonkTag, 4, 4)).'" at offset '.$BonkTagOffset.', found "'.$TagHeaderTest.'"'; + return false; + } + $BonkTagName = substr($TagHeaderTest, 1, 4); + + $thisfile_bonk[$BonkTagName]['size'] = $BonkTagSize; + $thisfile_bonk[$BonkTagName]['offset'] = $BonkTagOffset; + $this->HandleBonkTags($fd, $BonkTagName, $ThisFileInfo); + $NextTagEndOffset = $BonkTagOffset - 8; + if ($NextTagEndOffset < $thisfile_bonk['dataoffset']) { + if (empty($ThisFileInfo['audio']['encoder'])) { + $ThisFileInfo['audio']['encoder'] = 'Extended BONK v0.9+'; + } + return true; + } + fseek($fd, $NextTagEndOffset, SEEK_SET); + $PossibleBonkTag = fread($fd, 8); + } + + } + + // seek-from-beginning method for v0.4 and v0.5 + if (empty($thisfile_bonk['BONK'])) { + fseek($fd, $thisfile_bonk['dataoffset'], SEEK_SET); + do { + $TagHeaderTest = fread($fd, 5); + switch ($TagHeaderTest) { + case "\x00".'BONK': + if (empty($ThisFileInfo['audio']['encoder'])) { + $ThisFileInfo['audio']['encoder'] = 'BONK v0.4'; + } + break; + + case "\x00".'INFO': + $ThisFileInfo['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']; + $this->HandleBonkTags($fd, $BonkTagName, $ThisFileInfo); + + } while (true); + } + + // parse META block for v0.6 - v0.8 + if (empty($thisfile_bonk['INFO']) && isset($thisfile_bonk['META']['tags']['info'])) { + fseek($fd, $thisfile_bonk['META']['tags']['info'], SEEK_SET); + $TagHeaderTest = fread($fd, 5); + if ($TagHeaderTest == "\x00".'INFO') { + $ThisFileInfo['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']; + $this->HandleBonkTags($fd, $BonkTagName, $ThisFileInfo); + } + } + + if (empty($ThisFileInfo['audio']['encoder'])) { + $ThisFileInfo['audio']['encoder'] = 'Extended BONK v0.9+'; + } + if (empty($thisfile_bonk['BONK'])) { + unset($ThisFileInfo['bonk']); + } + return true; + + } + + function HandleBonkTags(&$fd, &$BonkTagName, &$ThisFileInfo) { + + switch ($BonkTagName) { + case 'BONK': + // shortcut + $thisfile_bonk_BONK = &$ThisFileInfo['bonk']['BONK']; + + $BonkData = "\x00".'BONK'.fread($fd, 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)); + + $ThisFileInfo['avdataoffset'] = $thisfile_bonk_BONK['offset'] + 5 + 17; + $ThisFileInfo['avdataend'] = $thisfile_bonk_BONK['offset'] + $thisfile_bonk_BONK['size']; + + $ThisFileInfo['fileformat'] = 'bonk'; + $ThisFileInfo['audio']['dataformat'] = 'bonk'; + $ThisFileInfo['audio']['bitrate_mode'] = 'vbr'; // assumed + $ThisFileInfo['audio']['channels'] = $thisfile_bonk_BONK['channels']; + $ThisFileInfo['audio']['sample_rate'] = $thisfile_bonk_BONK['sample_rate']; + $ThisFileInfo['audio']['channelmode'] = ($thisfile_bonk_BONK['joint_stereo'] ? 'joint stereo' : 'stereo'); + $ThisFileInfo['audio']['lossless'] = $thisfile_bonk_BONK['lossless']; + $ThisFileInfo['audio']['codec'] = 'bonk'; + + $ThisFileInfo['playtime_seconds'] = $thisfile_bonk_BONK['number_samples'] / ($thisfile_bonk_BONK['sample_rate'] * $thisfile_bonk_BONK['channels']); + if ($ThisFileInfo['playtime_seconds'] > 0) { + $ThisFileInfo['audio']['bitrate'] = (($ThisFileInfo['bonk']['dataend'] - $ThisFileInfo['bonk']['dataoffset']) * 8) / $ThisFileInfo['playtime_seconds']; + } + break; + + case 'INFO': + // shortcut + $thisfile_bonk_INFO = &$ThisFileInfo['bonk']['INFO']; + + $thisfile_bonk_INFO['version'] = getid3_lib::LittleEndian2Int(fread($fd, 1)); + $thisfile_bonk_INFO['entries_count'] = 0; + $NextInfoDataPair = fread($fd, 5); + if (!$this->BonkIsValidTagName(substr($NextInfoDataPair, 1, 4))) { + while (!feof($fd)) { + //$CurrentSeekInfo['offset'] = getid3_lib::LittleEndian2Int(substr($NextInfoDataPair, 0, 4)); + //$CurrentSeekInfo['nextbit'] = getid3_lib::LittleEndian2Int(substr($NextInfoDataPair, 4, 1)); + //$thisfile_bonk_INFO[] = $CurrentSeekInfo; + + $NextInfoDataPair = fread($fd, 5); + if ($this->BonkIsValidTagName(substr($NextInfoDataPair, 1, 4))) { + fseek($fd, -5, SEEK_CUR); + break; + } + $thisfile_bonk_INFO['entries_count']++; + } + } + break; + + case 'META': + $BonkData = "\x00".'META'.fread($fd, $ThisFileInfo['bonk']['META']['size'] - 5); + $ThisFileInfo['bonk']['META']['version'] = getid3_lib::LittleEndian2Int(substr($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; + $ThisFileInfo['bonk']['META']['tags'][$MetaEntryTagName] = $MetaEntryTagOffset; + } + break; + + case ' ID3': + $ThisFileInfo['audio']['encoder'] = 'Extended BONK v0.9+'; + + // ID3v2 checking is optional + if (class_exists('getid3_id3v2')) { + $ThisFileInfo['bonk'][' ID3']['valid'] = new getid3_id3v2($fd, $ThisFileInfo, $ThisFileInfo['bonk'][' ID3']['offset'] + 2); + } + break; + + default: + $ThisFileInfo['warning'][] = 'Unexpected Bonk tag "'.$BonkTagName.'" at offset '.$ThisFileInfo['bonk'][$BonkTagName]['offset']; + break; + + } + } + + 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; + } + +} + + +?>
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