/**
*
* @param type $filedata
* @param type $filename
* @return string|boolean
*/
public function GetFileFormat(&$filedata, $filename = '')
{
// this function will determine the format of a file based on usually
// the first 2-4 bytes of the file (8 bytes for PNG, 16 bytes for JPG,
// and in the case of ISO CD image, 6 bytes offset 32kb from the start
// of the file).
// Identify file format - loop through $format_info and detect with reg expr
$GetFileFormatArray = $this->GetFileFormatArray();
foreach ($GetFileFormatArray as $format_name => $info) {
// The /s switch on preg_match() forces preg_match() NOT to treat
// newline (0x0A) characters as special chars but do a binary match
if (!empty($info['pattern']) && preg_match('#' . $info['pattern'] . '#s', $filedata)) {
$info['class'] = 'GetId3_Module_' . GetId3_Lib_Helper::toCamelCase($info['group'], '-', true) . '_' . ucfirst($info['module']);
$info['include'] = str_replace('_', DIRECTORY_SEPARATOR, $info['class']) . '.php';
return $info;
}
}
if (preg_match('#\\.mp[123a]$#i', $filename)) {
// Too many mp3 encoders on the market put gabage in front of mpeg files
// use assume format on these if format detection failed
$info = $GetFileFormatArray['mp3'];
$info['class'] = 'GetId3_Module_' . GetId3_Lib_Helper::toCamelCase($info['group'], '-', true) . '_' . ucfirst($info['module']);
$info['include'] = str_replace('_', DIRECTORY_SEPARATOR, $info['class']) . '.php';
return $info;
} elseif (preg_match('/\\.cue$/i', $filename) && preg_match('#FILE "[^"]+" (BINARY|MOTOROLA|AIFF|WAVE|MP3)#', $filedata)) {
// there's not really a useful consistent "magic" at the beginning of .cue files to identify them
// so until I think of something better, just go by filename if all other format checks fail
// and verify there's at least one instance of "TRACK xx AUDIO" in the file
$info = $GetFileFormatArray['cue'];
$info['class'] = 'GetId3_Module_' . GetId3_Lib_Helper::toCamelCase($info['group'], '-', true) . '_' . ucfirst($info['module']);
$info['include'] = str_replace('_', DIRECTORY_SEPARATOR, $info['class']) . '.php';
return $info;
}
return false;
}
