/lib/vendor/getid3-1.9.0/demos/demo.mp3header.php
PHP | 1789 lines | 1412 code | 218 blank | 159 comment | 410 complexity | 22fb20b651c5497fc0f4d4078d833ffb MD5 | raw file
Possible License(s): LGPL-3.0, GPL-2.0, ISC, AGPL-3.0, LGPL-2.1, BSD-3-Clause
- <?php
- if (!function_exists('PrintHexBytes')) {
- function PrintHexBytes($string) {
- $returnstring = '';
- for ($i = 0; $i < strlen($string); $i++) {
- $returnstring .= str_pad(dechex(ord(substr($string, $i, 1))), 2, '0', STR_PAD_LEFT).' ';
- }
- return $returnstring;
- }
- }
- if (!function_exists('PrintTextBytes')) {
- function PrintTextBytes($string) {
- $returnstring = '';
- for ($i = 0; $i < strlen($string); $i++) {
- if (ord(substr($string, $i, 1)) <= 31) {
- $returnstring .= ' ';
- } else {
- $returnstring .= ' '.substr($string, $i, 1).' ';
- }
- }
- return $returnstring;
- }
- }
- if (!function_exists('table_var_dump')) {
- function table_var_dump($variable) {
- $returnstring = '';
- switch (gettype($variable)) {
- case 'array':
- $returnstring .= '<TABLE BORDER="1" CELLSPACING="0" CELLPADDING="2">';
- foreach ($variable as $key => $value) {
- $returnstring .= '<TR><TD VALIGN="TOP"><B>'.str_replace(chr(0), ' ', $key).'</B></TD>';
- $returnstring .= '<TD VALIGN="TOP">'.gettype($value);
- if (is_array($value)) {
- $returnstring .= ' ('.count($value).')';
- } elseif (is_string($value)) {
- $returnstring .= ' ('.strlen($value).')';
- }
- if (($key == 'data') && isset($variable['image_mime']) && isset($variable['dataoffset'])) {
- require_once(GETID3_INCLUDEPATH.'getid3.getimagesize.php');
- $imageinfo = array();
- $imagechunkcheck = GetDataImageSize($value, $imageinfo);
- $DumpedImageSRC = (!empty($_REQUEST['filename']) ? $_REQUEST['filename'] : '.getid3').'.'.$variable['dataoffset'].'.'.ImageTypesLookup($imagechunkcheck[2]);
- if ($tempimagefile = fopen($DumpedImageSRC, 'wb')) {
- fwrite($tempimagefile, $value);
- fclose($tempimagefile);
- }
- $returnstring .= '</TD><TD><IMG SRC="'.$DumpedImageSRC.'" WIDTH="'.$imagechunkcheck[0].'" HEIGHT="'.$imagechunkcheck[1].'"></TD></TR>';
- } else {
- $returnstring .= '</TD><TD>'.table_var_dump($value).'</TD></TR>';
- }
- }
- $returnstring .= '</TABLE>';
- break;
- case 'boolean':
- $returnstring .= ($variable ? 'TRUE' : 'FALSE');
- break;
- case 'integer':
- case 'double':
- case 'float':
- $returnstring .= $variable;
- break;
- case 'object':
- case 'null':
- $returnstring .= string_var_dump($variable);
- break;
- case 'string':
- $variable = str_replace(chr(0), ' ', $variable);
- $varlen = strlen($variable);
- for ($i = 0; $i < $varlen; $i++) {
- if (preg_match('#['.chr(0x0A).chr(0x0D).' -;0-9A-Za-z]#', $variable{$i})) {
- $returnstring .= $variable{$i};
- } else {
- $returnstring .= '&#'.str_pad(ord($variable{$i}), 3, '0', STR_PAD_LEFT).';';
- }
- }
- $returnstring = nl2br($returnstring);
- break;
- default:
- require_once(GETID3_INCLUDEPATH.'getid3.getimagesize.php');
- $imageinfo = array();
- $imagechunkcheck = GetDataImageSize(substr($variable, 0, 32768), $imageinfo);
- if (($imagechunkcheck[2] >= 1) && ($imagechunkcheck[2] <= 3)) {
- $returnstring .= '<table border="1" cellspacing="0" cellpadding="2">';
- $returnstring .= '<tr><td><b>type</b></td><td>'.ImageTypesLookup($imagechunkcheck[2]).'</td></tr>';
- $returnstring .= '<tr><td><b>width</b></td><td>'.number_format($imagechunkcheck[0]).' px</td></tr>';
- $returnstring .= '<tr><td><b>height</b></td><td>'.number_format($imagechunkcheck[1]).' px</td></tr>';
- $returnstring .= '<tr><td><b>size</b></td><td>'.number_format(strlen($variable)).' bytes</td></tr></table>';
- } else {
- $returnstring .= nl2br(htmlspecialchars(str_replace(chr(0), ' ', $variable)));
- }
- break;
- }
- return $returnstring;
- }
- }
- if (!function_exists('string_var_dump')) {
- function string_var_dump($variable) {
- if (version_compare(PHP_VERSION, '4.3.0', '>=')) {
- return print_r($variable, true);
- }
- ob_start();
- var_dump($variable);
- $dumpedvariable = ob_get_contents();
- ob_end_clean();
- return $dumpedvariable;
- }
- }
- if (!function_exists('fileextension')) {
- function fileextension($filename, $numextensions=1) {
- if (strstr($filename, '.')) {
- $reversedfilename = strrev($filename);
- $offset = 0;
- for ($i = 0; $i < $numextensions; $i++) {
- $offset = strpos($reversedfilename, '.', $offset + 1);
- if ($offset === false) {
- return '';
- }
- }
- return strrev(substr($reversedfilename, 0, $offset));
- }
- return '';
- }
- }
- if (!function_exists('RemoveAccents')) {
- function RemoveAccents($string) {
- // return strtr($string, 'ŠŒŽšœž&#x;???ÁÂ?Ä??Ç?É?Ë?ÍÎ????ÓÔ?Ö??Ú?ÜÝß?áâ?ä??ç?é?ë?íî????óô?ö??ú?üý?', 'SOZsozYYuAAAAAAACEEEEIIIIDNOOOOOOUUUUYsaaaaaaaceeeeiiiionoooooouuuuyy');
- // Revised version by marksteward@hotmail.com
- return strtr(strtr($string, 'ŠŽšž&#x;?ÁÂ?Ä?Ç?É?Ë?ÍÎ???ÓÔ?Ö??Ú?ÜÝ?áâ?ä?ç?é?ë?íî???óô?ö??ú?üý?', 'SZszYAAAAAACEEEEIIIINOOOOOOUUUUYaaaaaaceeeeiiiinoooooouuuuyy'), array('?' => 'TH', '?' => 'th', '?' => 'DH', '?' => 'dh', 'ß' => 'ss', 'Œ' => 'OE', 'œ' => 'oe', '?' => 'AE', '?' => 'ae', '?' => 'u'));
- }
- }
- if (!function_exists('MoreNaturalSort')) {
- function MoreNaturalSort($ar1, $ar2) {
- if ($ar1 === $ar2) {
- return 0;
- }
- $len1 = strlen($ar1);
- $len2 = strlen($ar2);
- $shortest = min($len1, $len2);
- if (substr($ar1, 0, $shortest) === substr($ar2, 0, $shortest)) {
- // the shorter argument is the beginning of the longer one, like "str" and "string"
- if ($len1 < $len2) {
- return -1;
- } elseif ($len1 > $len2) {
- return 1;
- }
- return 0;
- }
- $ar1 = RemoveAccents(strtolower(trim($ar1)));
- $ar2 = RemoveAccents(strtolower(trim($ar2)));
- $translatearray = array('\''=>'', '"'=>'', '_'=>' ', '('=>'', ')'=>'', '-'=>' ', ' '=>' ', '.'=>'', ','=>'');
- foreach ($translatearray as $key => $val) {
- $ar1 = str_replace($key, $val, $ar1);
- $ar2 = str_replace($key, $val, $ar2);
- }
- if ($ar1 < $ar2) {
- return -1;
- } elseif ($ar1 > $ar2) {
- return 1;
- }
- return 0;
- }
- }
- if (!function_exists('trunc')) {
- function trunc($floatnumber) {
- // truncates a floating-point number at the decimal point
- // returns int (if possible, otherwise float)
- if ($floatnumber >= 1) {
- $truncatednumber = floor($floatnumber);
- } elseif ($floatnumber <= -1) {
- $truncatednumber = ceil($floatnumber);
- } else {
- $truncatednumber = 0;
- }
- if ($truncatednumber <= pow(2, 30)) {
- $truncatednumber = (int) $truncatednumber;
- }
- return $truncatednumber;
- }
- }
- if (!function_exists('CastAsInt')) {
- function CastAsInt($floatnum) {
- // convert to float if not already
- $floatnum = (float) $floatnum;
- // convert a float to type int, only if possible
- if (trunc($floatnum) == $floatnum) {
- // it's not floating point
- if ($floatnum <= pow(2, 30)) {
- // it's within int range
- $floatnum = (int) $floatnum;
- }
- }
- return $floatnum;
- }
- }
- if (!function_exists('getmicrotime')) {
- function getmicrotime() {
- list($usec, $sec) = explode(' ', microtime());
- return ((float) $usec + (float) $sec);
- }
- }
- if (!function_exists('DecimalBinary2Float')) {
- function DecimalBinary2Float($binarynumerator) {
- $numerator = Bin2Dec($binarynumerator);
- $denominator = Bin2Dec(str_repeat('1', strlen($binarynumerator)));
- return ($numerator / $denominator);
- }
- }
- if (!function_exists('NormalizeBinaryPoint')) {
- function NormalizeBinaryPoint($binarypointnumber, $maxbits=52) {
- // http://www.scri.fsu.edu/~jac/MAD3401/Backgrnd/binary.html
- if (strpos($binarypointnumber, '.') === false) {
- $binarypointnumber = '0.'.$binarypointnumber;
- } elseif ($binarypointnumber{0} == '.') {
- $binarypointnumber = '0'.$binarypointnumber;
- }
- $exponent = 0;
- while (($binarypointnumber{0} != '1') || (substr($binarypointnumber, 1, 1) != '.')) {
- if (substr($binarypointnumber, 1, 1) == '.') {
- $exponent--;
- $binarypointnumber = substr($binarypointnumber, 2, 1).'.'.substr($binarypointnumber, 3);
- } else {
- $pointpos = strpos($binarypointnumber, '.');
- $exponent += ($pointpos - 1);
- $binarypointnumber = str_replace('.', '', $binarypointnumber);
- $binarypointnumber = $binarypointnumber{0}.'.'.substr($binarypointnumber, 1);
- }
- }
- $binarypointnumber = str_pad(substr($binarypointnumber, 0, $maxbits + 2), $maxbits + 2, '0', STR_PAD_RIGHT);
- return array('normalized'=>$binarypointnumber, 'exponent'=>(int) $exponent);
- }
- }
- if (!function_exists('Float2BinaryDecimal')) {
- function Float2BinaryDecimal($floatvalue) {
- // http://www.scri.fsu.edu/~jac/MAD3401/Backgrnd/binary.html
- $maxbits = 128; // to how many bits of precision should the calculations be taken?
- $intpart = trunc($floatvalue);
- $floatpart = abs($floatvalue - $intpart);
- $pointbitstring = '';
- while (($floatpart != 0) && (strlen($pointbitstring) < $maxbits)) {
- $floatpart *= 2;
- $pointbitstring .= (string) trunc($floatpart);
- $floatpart -= trunc($floatpart);
- }
- $binarypointnumber = decbin($intpart).'.'.$pointbitstring;
- return $binarypointnumber;
- }
- }
- if (!function_exists('Float2String')) {
- function Float2String($floatvalue, $bits) {
- // http://www.scri.fsu.edu/~jac/MAD3401/Backgrnd/ieee-expl.html
- switch ($bits) {
- case 32:
- $exponentbits = 8;
- $fractionbits = 23;
- break;
- case 64:
- $exponentbits = 11;
- $fractionbits = 52;
- break;
- default:
- return false;
- break;
- }
- if ($floatvalue >= 0) {
- $signbit = '0';
- } else {
- $signbit = '1';
- }
- $normalizedbinary = NormalizeBinaryPoint(Float2BinaryDecimal($floatvalue), $fractionbits);
- $biasedexponent = pow(2, $exponentbits - 1) - 1 + $normalizedbinary['exponent']; // (127 or 1023) +/- exponent
- $exponentbitstring = str_pad(decbin($biasedexponent), $exponentbits, '0', STR_PAD_LEFT);
- $fractionbitstring = str_pad(substr($normalizedbinary['normalized'], 2), $fractionbits, '0', STR_PAD_RIGHT);
- return BigEndian2String(Bin2Dec($signbit.$exponentbitstring.$fractionbitstring), $bits % 8, false);
- }
- }
- if (!function_exists('LittleEndian2Float')) {
- function LittleEndian2Float($byteword) {
- return BigEndian2Float(strrev($byteword));
- }
- }
- if (!function_exists('BigEndian2Float')) {
- function BigEndian2Float($byteword) {
- // ANSI/IEEE Standard 754-1985, Standard for Binary Floating Point Arithmetic
- // http://www.psc.edu/general/software/packages/ieee/ieee.html
- // http://www.scri.fsu.edu/~jac/MAD3401/Backgrnd/ieee.html
- $bitword = BigEndian2Bin($byteword);
- $signbit = $bitword{0};
- switch (strlen($byteword) * 8) {
- case 32:
- $exponentbits = 8;
- $fractionbits = 23;
- break;
- case 64:
- $exponentbits = 11;
- $fractionbits = 52;
- break;
- case 80:
- $exponentbits = 16;
- $fractionbits = 64;
- break;
- default:
- return false;
- break;
- }
- $exponentstring = substr($bitword, 1, $exponentbits - 1);
- $fractionstring = substr($bitword, $exponentbits, $fractionbits);
- $exponent = Bin2Dec($exponentstring);
- $fraction = Bin2Dec($fractionstring);
- if (($exponentbits == 16) && ($fractionbits == 64)) {
- // 80-bit
- // As used in Apple AIFF for sample_rate
- // A bit of a hack, but it works ;)
- return pow(2, ($exponent - 16382)) * DecimalBinary2Float($fractionstring);
- }
- if (($exponent == (pow(2, $exponentbits) - 1)) && ($fraction != 0)) {
- // Not a Number
- $floatvalue = false;
- } elseif (($exponent == (pow(2, $exponentbits) - 1)) && ($fraction == 0)) {
- if ($signbit == '1') {
- $floatvalue = '-infinity';
- } else {
- $floatvalue = '+infinity';
- }
- } elseif (($exponent == 0) && ($fraction == 0)) {
- if ($signbit == '1') {
- $floatvalue = -0;
- } else {
- $floatvalue = 0;
- }
- $floatvalue = ($signbit ? 0 : -0);
- } elseif (($exponent == 0) && ($fraction != 0)) {
- // These are 'unnormalized' values
- $floatvalue = pow(2, (-1 * (pow(2, $exponentbits - 1) - 2))) * DecimalBinary2Float($fractionstring);
- if ($signbit == '1') {
- $floatvalue *= -1;
- }
- } elseif ($exponent != 0) {
- $floatvalue = pow(2, ($exponent - (pow(2, $exponentbits - 1) - 1))) * (1 + DecimalBinary2Float($fractionstring));
- if ($signbit == '1') {
- $floatvalue *= -1;
- }
- }
- return (float) $floatvalue;
- }
- }
- if (!function_exists('BigEndian2Int')) {
- function BigEndian2Int($byteword, $synchsafe=false, $signed=false) {
- $intvalue = 0;
- $bytewordlen = strlen($byteword);
- for ($i = 0; $i < $bytewordlen; $i++) {
- if ($synchsafe) { // disregard MSB, effectively 7-bit bytes
- $intvalue = $intvalue | (ord($byteword{$i}) & 0x7F) << (($bytewordlen - 1 - $i) * 7);
- } else {
- $intvalue += ord($byteword{$i}) * pow(256, ($bytewordlen - 1 - $i));
- }
- }
- if ($signed && !$synchsafe) {
- // synchsafe ints are not allowed to be signed
- switch ($bytewordlen) {
- case 1:
- case 2:
- case 3:
- case 4:
- $signmaskbit = 0x80 << (8 * ($bytewordlen - 1));
- if ($intvalue & $signmaskbit) {
- $intvalue = 0 - ($intvalue & ($signmaskbit - 1));
- }
- break;
- default:
- die('ERROR: Cannot have signed integers larger than 32-bits in BigEndian2Int()');
- break;
- }
- }
- return CastAsInt($intvalue);
- }
- }
- if (!function_exists('LittleEndian2Int')) {
- function LittleEndian2Int($byteword, $signed=false) {
- return BigEndian2Int(strrev($byteword), false, $signed);
- }
- }
- if (!function_exists('BigEndian2Bin')) {
- function BigEndian2Bin($byteword) {
- $binvalue = '';
- $bytewordlen = strlen($byteword);
- for ($i = 0; $i < $bytewordlen; $i++) {
- $binvalue .= str_pad(decbin(ord($byteword{$i})), 8, '0', STR_PAD_LEFT);
- }
- return $binvalue;
- }
- }
- if (!function_exists('BigEndian2String')) {
- function BigEndian2String($number, $minbytes=1, $synchsafe=false, $signed=false) {
- if ($number < 0) {
- return false;
- }
- $maskbyte = (($synchsafe || $signed) ? 0x7F : 0xFF);
- $intstring = '';
- if ($signed) {
- if ($minbytes > 4) {
- die('ERROR: Cannot have signed integers larger than 32-bits in BigEndian2String()');
- }
- $number = $number & (0x80 << (8 * ($minbytes - 1)));
- }
- while ($number != 0) {
- $quotient = ($number / ($maskbyte + 1));
- $intstring = chr(ceil(($quotient - floor($quotient)) * $maskbyte)).$intstring;
- $number = floor($quotient);
- }
- return str_pad($intstring, $minbytes, chr(0), STR_PAD_LEFT);
- }
- }
- if (!function_exists('Dec2Bin')) {
- function Dec2Bin($number) {
- while ($number >= 256) {
- $bytes[] = (($number / 256) - (floor($number / 256))) * 256;
- $number = floor($number / 256);
- }
- $bytes[] = $number;
- $binstring = '';
- for ($i = 0; $i < count($bytes); $i++) {
- $binstring = (($i == count($bytes) - 1) ? decbin($bytes[$i]) : str_pad(decbin($bytes[$i]), 8, '0', STR_PAD_LEFT)).$binstring;
- }
- return $binstring;
- }
- }
- if (!function_exists('Bin2Dec')) {
- function Bin2Dec($binstring) {
- $decvalue = 0;
- for ($i = 0; $i < strlen($binstring); $i++) {
- $decvalue += ((int) substr($binstring, strlen($binstring) - $i - 1, 1)) * pow(2, $i);
- }
- return CastAsInt($decvalue);
- }
- }
- if (!function_exists('Bin2String')) {
- function Bin2String($binstring) {
- // return 'hi' for input of '0110100001101001'
- $string = '';
- $binstringreversed = strrev($binstring);
- for ($i = 0; $i < strlen($binstringreversed); $i += 8) {
- $string = chr(Bin2Dec(strrev(substr($binstringreversed, $i, 8)))).$string;
- }
- return $string;
- }
- }
- if (!function_exists('LittleEndian2String')) {
- function LittleEndian2String($number, $minbytes=1, $synchsafe=false) {
- $intstring = '';
- while ($number > 0) {
- if ($synchsafe) {
- $intstring = $intstring.chr($number & 127);
- $number >>= 7;
- } else {
- $intstring = $intstring.chr($number & 255);
- $number >>= 8;
- }
- }
- return str_pad($intstring, $minbytes, chr(0), STR_PAD_RIGHT);
- }
- }
- if (!function_exists('Bool2IntString')) {
- function Bool2IntString($intvalue) {
- return ($intvalue ? '1' : '0');
- }
- }
- if (!function_exists('IntString2Bool')) {
- function IntString2Bool($char) {
- if ($char == '1') {
- return true;
- } elseif ($char == '0') {
- return false;
- }
- return null;
- }
- }
- if (!function_exists('InverseBoolean')) {
- function InverseBoolean($value) {
- return ($value ? false : true);
- }
- }
- if (!function_exists('DeUnSynchronise')) {
- function DeUnSynchronise($data) {
- return str_replace(chr(0xFF).chr(0x00), chr(0xFF), $data);
- }
- }
- if (!function_exists('Unsynchronise')) {
- function Unsynchronise($data) {
- // Whenever a false synchronisation is found within the tag, one zeroed
- // byte is inserted after the first false synchronisation byte. The
- // format of a correct sync that should be altered by ID3 encoders is as
- // follows:
- // %11111111 111xxxxx
- // And should be replaced with:
- // %11111111 00000000 111xxxxx
- // This has the side effect that all $FF 00 combinations have to be
- // altered, so they won't be affected by the decoding process. Therefore
- // all the $FF 00 combinations have to be replaced with the $FF 00 00
- // combination during the unsynchronisation.
- $data = str_replace(chr(0xFF).chr(0x00), chr(0xFF).chr(0x00).chr(0x00), $data);
- $unsyncheddata = '';
- for ($i = 0; $i < strlen($data); $i++) {
- $thischar = $data{$i};
- $unsyncheddata .= $thischar;
- if ($thischar == chr(255)) {
- $nextchar = ord(substr($data, $i + 1, 1));
- if (($nextchar | 0xE0) == 0xE0) {
- // previous byte = 11111111, this byte = 111?????
- $unsyncheddata .= chr(0);
- }
- }
- }
- return $unsyncheddata;
- }
- }
- if (!function_exists('is_hash')) {
- function is_hash($var) {
- // written by dev-null@christophe.vg
- // taken from http://www.php.net/manual/en/function.array-merge-recursive.php
- if (is_array($var)) {
- $keys = array_keys($var);
- $all_num = true;
- for ($i = 0; $i < count($keys); $i++) {
- if (is_string($keys[$i])) {
- return true;
- }
- }
- }
- return false;
- }
- }
- if (!function_exists('array_join_merge')) {
- function array_join_merge($arr1, $arr2) {
- // written by dev-null@christophe.vg
- // taken from http://www.php.net/manual/en/function.array-merge-recursive.php
- if (is_array($arr1) && is_array($arr2)) {
- // the same -> merge
- $new_array = array();
- if (is_hash($arr1) && is_hash($arr2)) {
- // hashes -> merge based on keys
- $keys = array_merge(array_keys($arr1), array_keys($arr2));
- foreach ($keys as $key) {
- $arr1[$key] = (isset($arr1[$key]) ? $arr1[$key] : '');
- $arr2[$key] = (isset($arr2[$key]) ? $arr2[$key] : '');
- $new_array[$key] = array_join_merge($arr1[$key], $arr2[$key]);
- }
- } else {
- // two real arrays -> merge
- $new_array = array_reverse(array_unique(array_reverse(array_merge($arr1,$arr2))));
- }
- return $new_array;
- } else {
- // not the same ... take new one if defined, else the old one stays
- return $arr2 ? $arr2 : $arr1;
- }
- }
- }
- if (!function_exists('array_merge_clobber')) {
- function array_merge_clobber($array1, $array2) {
- // written by kc@hireability.com
- // taken from http://www.php.net/manual/en/function.array-merge-recursive.php
- if (!is_array($array1) || !is_array($array2)) {
- return false;
- }
- $newarray = $array1;
- foreach ($array2 as $key => $val) {
- if (is_array($val) && isset($newarray[$key]) && is_array($newarray[$key])) {
- $newarray[$key] = array_merge_clobber($newarray[$key], $val);
- } else {
- $newarray[$key] = $val;
- }
- }
- return $newarray;
- }
- }
- if (!function_exists('array_merge_noclobber')) {
- function array_merge_noclobber($array1, $array2) {
- if (!is_array($array1) || !is_array($array2)) {
- return false;
- }
- $newarray = $array1;
- foreach ($array2 as $key => $val) {
- if (is_array($val) && isset($newarray[$key]) && is_array($newarray[$key])) {
- $newarray[$key] = array_merge_noclobber($newarray[$key], $val);
- } elseif (!isset($newarray[$key])) {
- $newarray[$key] = $val;
- }
- }
- return $newarray;
- }
- }
- if (!function_exists('RoughTranslateUnicodeToASCII')) {
- function RoughTranslateUnicodeToASCII($rawdata, $frame_textencoding) {
- // rough translation of data for application that can't handle Unicode data
- $tempstring = '';
- switch ($frame_textencoding) {
- case 0: // ISO-8859-1. Terminated with $00.
- $asciidata = $rawdata;
- break;
- case 1: // UTF-16 encoded Unicode with BOM. Terminated with $00 00.
- $asciidata = $rawdata;
- if (substr($asciidata, 0, 2) == chr(0xFF).chr(0xFE)) {
- // remove BOM, only if present (it should be, but...)
- $asciidata = substr($asciidata, 2);
- }
- if (substr($asciidata, strlen($asciidata) - 2, 2) == chr(0).chr(0)) {
- $asciidata = substr($asciidata, 0, strlen($asciidata) - 2); // remove terminator, only if present (it should be, but...)
- }
- for ($i = 0; $i < strlen($asciidata); $i += 2) {
- if ((ord($asciidata{$i}) <= 0x7F) || (ord($asciidata{$i}) >= 0xA0)) {
- $tempstring .= $asciidata{$i};
- } else {
- $tempstring .= '?';
- }
- }
- $asciidata = $tempstring;
- break;
- case 2: // UTF-16BE encoded Unicode without BOM. Terminated with $00 00.
- $asciidata = $rawdata;
- if (substr($asciidata, strlen($asciidata) - 2, 2) == chr(0).chr(0)) {
- $asciidata = substr($asciidata, 0, strlen($asciidata) - 2); // remove terminator, only if present (it should be, but...)
- }
- for ($i = 0; $i < strlen($asciidata); $i += 2) {
- if ((ord($asciidata{$i}) <= 0x7F) || (ord($asciidata{$i}) >= 0xA0)) {
- $tempstring .= $asciidata{$i};
- } else {
- $tempstring .= '?';
- }
- }
- $asciidata = $tempstring;
- break;
- case 3: // UTF-8 encoded Unicode. Terminated with $00.
- $asciidata = utf8_decode($rawdata);
- break;
- case 255: // Unicode, Big-Endian. Terminated with $00 00.
- $asciidata = $rawdata;
- if (substr($asciidata, strlen($asciidata) - 2, 2) == chr(0).chr(0)) {
- $asciidata = substr($asciidata, 0, strlen($asciidata) - 2); // remove terminator, only if present (it should be, but...)
- }
- for ($i = 0; ($i + 1) < strlen($asciidata); $i += 2) {
- if ((ord($asciidata{($i + 1)}) <= 0x7F) || (ord($asciidata{($i + 1)}) >= 0xA0)) {
- $tempstring .= $asciidata{($i + 1)};
- } else {
- $tempstring .= '?';
- }
- }
- $asciidata = $tempstring;
- break;
- default:
- // shouldn't happen, but in case $frame_textencoding is not 1 <= $frame_textencoding <= 4
- // just pass the data through unchanged.
- $asciidata = $rawdata;
- break;
- }
- if (substr($asciidata, strlen($asciidata) - 1, 1) == chr(0)) {
- // remove null terminator, if present
- $asciidata = NoNullString($asciidata);
- }
- return $asciidata;
- // return str_replace(chr(0), '', $asciidata); // just in case any nulls slipped through
- }
- }
- if (!function_exists('PlaytimeString')) {
- function PlaytimeString($playtimeseconds) {
- $contentseconds = round((($playtimeseconds / 60) - floor($playtimeseconds / 60)) * 60);
- $contentminutes = floor($playtimeseconds / 60);
- if ($contentseconds >= 60) {
- $contentseconds -= 60;
- $contentminutes++;
- }
- return number_format($contentminutes).':'.str_pad($contentseconds, 2, 0, STR_PAD_LEFT);
- }
- }
- if (!function_exists('CloseMatch')) {
- function CloseMatch($value1, $value2, $tolerance) {
- return (abs($value1 - $value2) <= $tolerance);
- }
- }
- if (!function_exists('ID3v1matchesID3v2')) {
- function ID3v1matchesID3v2($id3v1, $id3v2) {
- $requiredindices = array('title', 'artist', 'album', 'year', 'genre', 'comment');
- foreach ($requiredindices as $requiredindex) {
- if (!isset($id3v1["$requiredindex"])) {
- $id3v1["$requiredindex"] = '';
- }
- if (!isset($id3v2["$requiredindex"])) {
- $id3v2["$requiredindex"] = '';
- }
- }
- if (trim($id3v1['title']) != trim(substr($id3v2['title'], 0, 30))) {
- return false;
- }
- if (trim($id3v1['artist']) != trim(substr($id3v2['artist'], 0, 30))) {
- return false;
- }
- if (trim($id3v1['album']) != trim(substr($id3v2['album'], 0, 30))) {
- return false;
- }
- if (trim($id3v1['year']) != trim(substr($id3v2['year'], 0, 4))) {
- return false;
- }
- if (trim($id3v1['genre']) != trim($id3v2['genre'])) {
- return false;
- }
- if (isset($id3v1['track'])) {
- if (!isset($id3v1['track']) || (trim($id3v1['track']) != trim($id3v2['track']))) {
- return false;
- }
- if (trim($id3v1['comment']) != trim(substr($id3v2['comment'], 0, 28))) {
- return false;
- }
- } else {
- if (trim($id3v1['comment']) != trim(substr($id3v2['comment'], 0, 30))) {
- return false;
- }
- }
- return true;
- }
- }
- if (!function_exists('FILETIMEtoUNIXtime')) {
- function FILETIMEtoUNIXtime($FILETIME, $round=true) {
- // FILETIME is a 64-bit unsigned integer representing
- // the number of 100-nanosecond intervals since January 1, 1601
- // UNIX timestamp is number of seconds since January 1, 1970
- // 116444736000000000 = 10000000 * 60 * 60 * 24 * 365 * 369 + 89 leap days
- if ($round) {
- return round(($FILETIME - 116444736000000000) / 10000000);
- }
- return ($FILETIME - 116444736000000000) / 10000000;
- }
- }
- if (!function_exists('GUIDtoBytestring')) {
- function GUIDtoBytestring($GUIDstring) {
- // Microsoft defines these 16-byte (128-bit) GUIDs in the strangest way:
- // first 4 bytes are in little-endian order
- // next 2 bytes are appended in little-endian order
- // next 2 bytes are appended in little-endian order
- // next 2 bytes are appended in big-endian order
- // next 6 bytes are appended in big-endian order
- // AaBbCcDd-EeFf-GgHh-IiJj-KkLlMmNnOoPp is stored as this 16-byte string:
- // $Dd $Cc $Bb $Aa $Ff $Ee $Hh $Gg $Ii $Jj $Kk $Ll $Mm $Nn $Oo $Pp
- $hexbytecharstring = chr(hexdec(substr($GUIDstring, 6, 2)));
- $hexbytecharstring .= chr(hexdec(substr($GUIDstring, 4, 2)));
- $hexbytecharstring .= chr(hexdec(substr($GUIDstring, 2, 2)));
- $hexbytecharstring .= chr(hexdec(substr($GUIDstring, 0, 2)));
- $hexbytecharstring .= chr(hexdec(substr($GUIDstring, 11, 2)));
- $hexbytecharstring .= chr(hexdec(substr($GUIDstring, 9, 2)));
- $hexbytecharstring .= chr(hexdec(substr($GUIDstring, 16, 2)));
- $hexbytecharstring .= chr(hexdec(substr($GUIDstring, 14, 2)));
- $hexbytecharstring .= chr(hexdec(substr($GUIDstring, 19, 2)));
- $hexbytecharstring .= chr(hexdec(substr($GUIDstring, 21, 2)));
- $hexbytecharstring .= chr(hexdec(substr($GUIDstring, 24, 2)));
- $hexbytecharstring .= chr(hexdec(substr($GUIDstring, 26, 2)));
- $hexbytecharstring .= chr(hexdec(substr($GUIDstring, 28, 2)));
- $hexbytecharstring .= chr(hexdec(substr($GUIDstring, 30, 2)));
- $hexbytecharstring .= chr(hexdec(substr($GUIDstring, 32, 2)));
- $hexbytecharstring .= chr(hexdec(substr($GUIDstring, 34, 2)));
- return $hexbytecharstring;
- }
- }
- if (!function_exists('BytestringToGUID')) {
- function BytestringToGUID($Bytestring) {
- $GUIDstring = str_pad(dechex(ord($Bytestring{3})), 2, '0', STR_PAD_LEFT);
- $GUIDstring .= str_pad(dechex(ord($Bytestring{2})), 2, '0', STR_PAD_LEFT);
- $GUIDstring .= str_pad(dechex(ord($Bytestring{1})), 2, '0', STR_PAD_LEFT);
- $GUIDstring .= str_pad(dechex(ord($Bytestring{0})), 2, '0', STR_PAD_LEFT);
- $GUIDstring .= '-';
- $GUIDstring .= str_pad(dechex(ord($Bytestring{5})), 2, '0', STR_PAD_LEFT);
- $GUIDstring .= str_pad(dechex(ord($Bytestring{4})), 2, '0', STR_PAD_LEFT);
- $GUIDstring .= '-';
- $GUIDstring .= str_pad(dechex(ord($Bytestring{7})), 2, '0', STR_PAD_LEFT);
- $GUIDstring .= str_pad(dechex(ord($Bytestring{6})), 2, '0', STR_PAD_LEFT);
- $GUIDstring .= '-';
- $GUIDstring .= str_pad(dechex(ord($Bytestring{8})), 2, '0', STR_PAD_LEFT);
- $GUIDstring .= str_pad(dechex(ord($Bytestring{9})), 2, '0', STR_PAD_LEFT);
- $GUIDstring .= '-';
- $GUIDstring .= str_pad(dechex(ord($Bytestring{10})), 2, '0', STR_PAD_LEFT);
- $GUIDstring .= str_pad(dechex(ord($Bytestring{11})), 2, '0', STR_PAD_LEFT);
- $GUIDstring .= str_pad(dechex(ord($Bytestring{12})), 2, '0', STR_PAD_LEFT);
- $GUIDstring .= str_pad(dechex(ord($Bytestring{13})), 2, '0', STR_PAD_LEFT);
- $GUIDstring .= str_pad(dechex(ord($Bytestring{14})), 2, '0', STR_PAD_LEFT);
- $GUIDstring .= str_pad(dechex(ord($Bytestring{15})), 2, '0', STR_PAD_LEFT);
- return strtoupper($GUIDstring);
- }
- }
- if (!function_exists('BitrateColor')) {
- function BitrateColor($bitrate) {
- $bitrate /= 3; // scale from 1-768kbps to 1-256kbps
- $bitrate--; // scale from 1-256kbps to 0-255kbps
- $bitrate = max($bitrate, 0);
- $bitrate = min($bitrate, 255);
- //$bitrate = max($bitrate, 32);
- //$bitrate = min($bitrate, 143);
- //$bitrate = ($bitrate * 2) - 32;
- $Rcomponent = max(255 - ($bitrate * 2), 0);
- $Gcomponent = max(($bitrate * 2) - 255, 0);
- if ($bitrate > 127) {
- $Bcomponent = max((255 - $bitrate) * 2, 0);
- } else {
- $Bcomponent = max($bitrate * 2, 0);
- }
- return str_pad(dechex($Rcomponent), 2, '0', STR_PAD_LEFT).str_pad(dechex($Gcomponent), 2, '0', STR_PAD_LEFT).str_pad(dechex($Bcomponent), 2, '0', STR_PAD_LEFT);
- }
- }
- if (!function_exists('BitrateText')) {
- function BitrateText($bitrate) {
- return '<SPAN STYLE="color: #'.BitrateColor($bitrate).'">'.round($bitrate).' kbps</SPAN>';
- }
- }
- if (!function_exists('image_type_to_mime_type')) {
- function image_type_to_mime_type($imagetypeid) {
- // only available in PHP v4.3.0+
- static $image_type_to_mime_type = array();
- if (empty($image_type_to_mime_type)) {
- $image_type_to_mime_type[1] = 'image/gif'; // GIF
- $image_type_to_mime_type[2] = 'image/jpeg'; // JPEG
- $image_type_to_mime_type[3] = 'image/png'; // PNG
- $image_type_to_mime_type[4] = 'application/x-shockwave-flash'; // Flash
- $image_type_to_mime_type[5] = 'image/psd'; // PSD
- $image_type_to_mime_type[6] = 'image/bmp'; // BMP
- $image_type_to_mime_type[7] = 'image/tiff'; // TIFF: little-endian (Intel)
- $image_type_to_mime_type[8] = 'image/tiff'; // TIFF: big-endian (Motorola)
- //$image_type_to_mime_type[9] = 'image/jpc'; // JPC
- //$image_type_to_mime_type[10] = 'image/jp2'; // JPC
- //$image_type_to_mime_type[11] = 'image/jpx'; // JPC
- //$image_type_to_mime_type[12] = 'image/jb2'; // JPC
- $image_type_to_mime_type[13] = 'application/x-shockwave-flash'; // Shockwave
- $image_type_to_mime_type[14] = 'image/iff'; // IFF
- }
- return (isset($image_type_to_mime_type[$imagetypeid]) ? $image_type_to_mime_type[$imagetypeid] : 'application/octet-stream');
- }
- }
- if (!function_exists('utf8_decode')) {
- // PHP has this function built-in if it's configured with the --with-xml option
- // This version of the function is only provided in case XML isn't installed
- function utf8_decode($utf8text) {
- // http://www.php.net/manual/en/function.utf8-encode.php
- // bytes bits representation
- // 1 7 0bbbbbbb
- // 2 11 110bbbbb 10bbbbbb
- // 3 16 1110bbbb 10bbbbbb 10bbbbbb
- // 4 21 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb
- $utf8length = strlen($utf8text);
- $decodedtext = '';
- for ($i = 0; $i < $utf8length; $i++) {
- if ((ord($utf8text{$i}) & 0x80) == 0) {
- $decodedtext .= $utf8text{$i};
- } elseif ((ord($utf8text{$i}) & 0xF0) == 0xF0) {
- $decodedtext .= '?';
- $i += 3;
- } elseif ((ord($utf8text{$i}) & 0xE0) == 0xE0) {
- $decodedtext .= '?';
- $i += 2;
- } elseif ((ord($utf8text{$i}) & 0xC0) == 0xC0) {
- // 2 11 110bbbbb 10bbbbbb
- $decodedchar = Bin2Dec(substr(Dec2Bin(ord($utf8text{$i})), 3, 5).substr(Dec2Bin(ord($utf8text{($i + 1)})), 2, 6));
- if ($decodedchar <= 255) {
- $decodedtext .= chr($decodedchar);
- } else {
- $decodedtext .= '?';
- }
- $i += 1;
- }
- }
- return $decodedtext;
- }
- }
- if (!function_exists('DateMac2Unix')) {
- function DateMac2Unix($macdate) {
- // Macintosh timestamp: seconds since 00:00h January 1, 1904
- // UNIX timestamp: seconds since 00:00h January 1, 1970
- return CastAsInt($macdate - 2082844800);
- }
- }
- if (!function_exists('FixedPoint8_8')) {
- function FixedPoint8_8($rawdata) {
- return BigEndian2Int(substr($rawdata, 0, 1)) + (float) (BigEndian2Int(substr($rawdata, 1, 1)) / pow(2, 8));
- }
- }
- if (!function_exists('FixedPoint16_16')) {
- function FixedPoint16_16($rawdata) {
- return BigEndian2Int(substr($rawdata, 0, 2)) + (float) (BigEndian2Int(substr($rawdata, 2, 2)) / pow(2, 16));
- }
- }
- if (!function_exists('FixedPoint2_30')) {
- function FixedPoint2_30($rawdata) {
- $binarystring = BigEndian2Bin($rawdata);
- return Bin2Dec(substr($binarystring, 0, 2)) + (float) (Bin2Dec(substr($binarystring, 2, 30)) / pow(2, 30));
- }
- }
- if (!function_exists('Pascal2String')) {
- function Pascal2String($pascalstring) {
- // Pascal strings have 1 byte at the beginning saying how many chars are in the string
- return substr($pascalstring, 1);
- }
- }
- if (!function_exists('NoNullString')) {
- function NoNullString($nullterminatedstring) {
- // remove the single null terminator on null terminated strings
- if (substr($nullterminatedstring, strlen($nullterminatedstring) - 1, 1) === chr(0)) {
- return substr($nullterminatedstring, 0, strlen($nullterminatedstring) - 1);
- }
- return $nullterminatedstring;
- }
- }
- if (!function_exists('FileSizeNiceDisplay')) {
- function FileSizeNiceDisplay($filesize, $precision=2) {
- if ($filesize < 1000) {
- $sizeunit = 'bytes';
- $precision = 0;
- } else {
- $filesize /= 1024;
- $sizeunit = 'kB';
- }
- if ($filesize >= 1000) {
- $filesize /= 1024;
- $sizeunit = 'MB';
- }
- if ($filesize >= 1000) {
- $filesize /= 1024;
- $sizeunit = 'GB';
- }
- return number_format($filesize, $precision).' '.$sizeunit;
- }
- }
- if (!function_exists('DOStime2UNIXtime')) {
- function DOStime2UNIXtime($DOSdate, $DOStime) {
- // wFatDate
- // Specifies the MS-DOS date. The date is a packed 16-bit value with the following format:
- // Bits Contents
- // 0-4 Day of the month (1-31)
- // 5-8 Month (1 = January, 2 = February, and so on)
- // 9-15 Year offset from 1980 (add 1980 to get actual year)
- $UNIXday = ($DOSdate & 0x001F);
- $UNIXmonth = (($DOSdate & 0x01E0) >> 5);
- $UNIXyear = (($DOSdate & 0xFE00) >> 9) + 1980;
- // wFatTime
- // Specifies the MS-DOS time. The time is a packed 16-bit value with the following format:
- // Bits Contents
- // 0-4 Second divided by 2
- // 5-10 Minute (0-59)
- // 11-15 Hour (0-23 on a 24-hour clock)
- $UNIXsecond = ($DOStime & 0x001F) * 2;
- $UNIXminute = (($DOStime & 0x07E0) >> 5);
- $UNIXhour = (($DOStime & 0xF800) >> 11);
- return mktime($UNIXhour, $UNIXminute, $UNIXsecond, $UNIXmonth, $UNIXday, $UNIXyear);
- }
- }
- if (!function_exists('CreateDeepArray')) {
- function CreateDeepArray($ArrayPath, $Separator, $Value) {
- // assigns $Value to a nested array path:
- // $foo = CreateDeepArray('/path/to/my', '/', 'file.txt')
- // is the same as:
- // $foo = array('path'=>array('to'=>'array('my'=>array('file.txt'))));
- // or
- // $foo['path']['to']['my'] = 'file.txt';
- while ($ArrayPath{0} == $Separator) {
- $ArrayPath = substr($ArrayPath, 1);
- }
- if (($pos = strpos($ArrayPath, $Separator)) !== false) {
- $ReturnedArray[substr($ArrayPath, 0, $pos)] = CreateDeepArray(substr($ArrayPath, $pos + 1), $Separator, $Value);
- } else {
- $ReturnedArray["$ArrayPath"] = $Value;
- }
- return $ReturnedArray;
- }
- }
- if (!function_exists('md5_file')) {
- // Allan Hansen <ah@artemis.dk>
- // md5_file() exists in PHP 4.2.0.
- // The following works under UNIX only, but dies on windows
- function md5_file($file) {
- if (substr(php_uname(), 0, 7) == 'Windows') {
- die('PHP 4.2.0 or newer required for md5_file()');
- }
- $file = str_replace('`', '\\`', $file);
- if (preg_match("#^([0-9a-f]{32})[ \t\n\r]#i", `md5sum "$file"`, $r)) {
- return $r[1];
- }
- return false;
- }
- }
- if (!function_exists('md5_data')) {
- // Allan Hansen <ah@artemis.dk>
- // md5_data() - returns md5sum for a file from startuing position to absolute end position
- function md5_data($file, $offset, $end, $invertsign=false) {
- // first try and create a temporary file in the same directory as the file being scanned
- if (($dataMD5filename = tempnam(dirname($file), preg_replace('#[^[:alnum:]]#i', '', basename($file)))) === false) {
- // if that fails, create a temporary file in the system temp directory
- if (($dataMD5filename = tempnam('/tmp', 'getID3')) === false) {
- // if that fails, create a temporary file in the current directory
- if (($dataMD5filename = tempnam('.', preg_replace('#[^[:alnum:]]#i', '', basename($file)))) === false) {
- // can't find anywhere to create a temp file, just die
- return false;
- }
- }
- }
- $md5 = false;
- set_time_limit(max(filesize($file) / 1000000, 30));
- // copy parts of file
- ob_start();
- if ($fp = fopen($file, 'rb')) {
- ob_end_clean();
- ob_start();
- if ($MD5fp = fopen($dataMD5filename, 'wb')) {
- ob_end_clean();
- if ($invertsign) {
- // Load conversion lookup strings for 8-bit unsigned->signed conversion below
- $from = '';
- $to = '';
- for ($i = 0; $i < 128; $i++) {
- $from .= chr($i);
- $to .= chr($i + 128);
- }
- for ($i = 128; $i < 256; $i++) {
- $from .= chr($i);
- $to .= chr($i - 128);
- }
- }
- fseek($fp, $offset, SEEK_SET);
- $byteslefttowrite = $end - $offset;
- while (($byteslefttowrite > 0) && ($buffer = fread($fp, 32768))) {
- if ($invertsign) {
- // Possibly FLAC-specific (?)
- // FLAC calculates the MD5sum of the source data of 8-bit files
- // not on the actual byte values in the source file, but of those
- // values converted from unsigned to signed, or more specifcally,
- // with the MSB inverted. ex: 01 -> 81; F5 -> 75; etc
- // Therefore, 8-bit WAV data has to be converted before getting the
- // md5_data value so as to match the FLAC value
- // Flip the MSB for each byte in the buffer before copying
- $buffer = strtr($buffer, $from, $to);
- }
- $byteswritten = fwrite($MD5fp, $buffer, $byteslefttowrite);
- $byteslefttowrite -= $byteswritten;
- }
- fclose($MD5fp);
- $md5 = md5_file($dataMD5filename);
- } else {
- $errormessage = ob_get_contents();
- ob_end_clean();
- }
- fclose($fp);
- } else {
- $errormessage = ob_get_contents();
- ob_end_clean();
- }
- unlink($dataMD5filename);
- return $md5;
- }
- }
- if (!function_exists('TwosCompliment2Decimal')) {
- function TwosCompliment2Decimal($BinaryValue) {
- // http://sandbox.mc.edu/~bennet/cs110/tc/tctod.html
- // First check if the number is negative or positive by looking at the sign bit.
- // If it is positive, simply convert it to decimal.
- // If it is negative, make it positive by inverting the bits and adding one.
- // Then, convert the result to decimal.
- // The negative of this number is the value of the original binary.
- if ($BinaryValue & 0x80) {
- // negative number
- return (0 - ((~$BinaryValue & 0xFF) + 1));
- } else {
- // positive number
- return $BinaryValue;
- }
- }
- }
- if (!function_exists('LastArrayElement')) {
- function LastArrayElement($MyArray) {
- if (!is_array($MyArray)) {
- return false;
- }
- if (empty($MyArray)) {
- return null;
- }
- foreach ($MyArray as $key => $value) {
- }
- return $value;
- }
- }
- if (!function_exists('safe_inc')) {
- function safe_inc(&$variable, $increment=1) {
- if (isset($variable)) {
- $variable += $increment;
- } else {
- $variable = $increment;
- }
- return true;
- }
- }
- if (!function_exists('CalculateCompressionRatioVideo')) {
- function CalculateCompressionRatioVideo(&$ThisFileInfo) {
- if (empty($ThisFileInfo['video'])) {
- return false;
- }
- if (empty($ThisFileInfo['video']['resolution_x']) || empty($ThisFileInfo['video']['resolution_y'])) {
- return false;
- }
- if (empty($ThisFileInfo['video']['bits_per_sample'])) {
- return false;
- }
- switch ($ThisFileInfo['video']['dataformat']) {
- case 'bmp':
- case 'gif':
- case 'jpeg':
- case 'jpg':
- case 'png':
- case 'tiff':
- $FrameRate = 1;
- $PlaytimeSeconds = 1;
- $BitrateCompressed = $ThisFileInfo['filesize'] * 8;
- break;
- default:
- if (!empty($ThisFileInfo['video']['frame_rate'])) {
- $FrameRate = $ThisFileInfo['video']['frame_rate'];
- } else {
- return false;
- }
- if (!empty($ThisFileInfo['playtime_seconds'])) {
- $PlaytimeSeconds = $ThisFileInfo['playtime_seconds'];
- } else {
- return false;
- }
- if (!empty($ThisFileInfo['video']['bitrate'])) {
- $BitrateCompressed = $ThisFileInfo['video']['bitrate'];
- } else {
- return false;
- }
- break;
- }
- $BitrateUncompressed = $ThisFileInfo['video']['resolution_x'] * $ThisFileInfo['video']['resolution_y'] * $ThisFileInfo['video']['bits_per_sample'] * $FrameRate;
- $ThisFileInfo['video']['compression_ratio'] = $BitrateCompressed / $BitrateUncompressed;
- return true;
- }
- }
- if (!function_exists('CalculateCompressionRatioAudio')) {
- function CalculateCompressionRatioAudio(&$ThisFileInfo) {
- if (empty($ThisFileInfo['audio']['bitrate']) || empty($ThisFileInfo['audio']['channels']) || empty($ThisFileInfo['audio']['sample_rate']) || empty($ThisFileInfo['audio']['bits_per_sample'])) {
- return false;
- }
- $ThisFileInfo['audio']['compression_ratio'] = $ThisFileInfo['audio']['bitrate'] / ($ThisFileInfo['audio']['channels'] * $ThisFileInfo['audio']['sample_rate'] * $ThisFileInfo['audio']['bits_per_sample']);
- return true;
- }
- }
- if (!function_exists('IsValidMIMEstring')) {
- function IsValidMIMEstring($mimestring) {
- if ((strlen($mimestring) >= 3) && (strpos($mimestring, '/') > 0) && (strpos($mimestring, '/') < (strlen($mimestring) - 1))) {
- return true;
- }
- return false;
- }
- }
- if (!function_exists('IsWithinBitRange')) {
- function IsWithinBitRange($number, $maxbits, $signed=false) {
- if ($signed) {
- if (($number > (0 - pow(2, $maxbits - 1))) && ($number <= pow(2, $maxbits - 1))) {
- return true;
- }
- } else {
- if (($number >= 0) && ($number <= pow(2, $maxbits))) {
- return true;
- }
- }
- return false;
- }
- }
- if (!function_exists('safe_parse_url')) {
- function safe_parse_url($url) {
- ob_start();
- $parts = parse_url($url);
- $errormessage = ob_get_contents();
- ob_end_clean();
- $parts['scheme'] = (isset($parts['scheme']) ? $parts['scheme'] : '');
- $parts['host'] = (isset($parts['host']) ? $parts['host'] : '');
- $parts['user'] = (isset($parts['user']) ? $parts['user'] : '');
- $parts['pass'] = (isset($parts['pass']) ? $parts['pass'] : '');
- $parts['path'] = (isset($parts['path']) ? $parts['path'] : '');
- $parts['query'] = (isset($parts['query']) ? $parts['query'] : '');
- return $parts;
- }
- }
- if (!function_exists('IsValidURL')) {
- function IsValidURL($url, $allowUserPass=false) {
- if ($url == '') {
- return false;
- }
- if ($allowUserPass !== true) {
- if (strstr($url, '@')) {
- // in the format http://user:pass@example.com or http://user@example.com
- // but could easily be somebody incorrectly entering an email address in place of a URL
- return false;
- }
- }
- if ($parts = safe_parse_url($url)) {
- if (($parts['scheme'] != 'http') && ($parts['scheme'] != 'https') && ($parts['scheme'] != 'ftp') && ($parts['scheme'] != 'gopher')) {
- return false;
- } elseif (!preg_match("#^[[:alnum:]]([-.]?[0-9a-z])*\.[a-z]{2,3}#i$", $parts['host'], $regs) && !preg_match('#^[0-9]{1,3}(\.[0-9]{1,3}){3}$#', $parts['host'])) {
- return false;
- } elseif (!preg_match("#^([[:alnum:]-]|[\_])*$#i", $parts['user'], $regs)) {
- return false;
- } elseif (!preg_match("#^([[:alnum:]-]|[\_])*$#i", $parts['pass'], $regs)) {
- return false;
- } elseif (!preg_match("#^[[:alnum:]/_\.@~-]*$#i", $parts['path'], $regs)) {
- return false;
- } elseif (!preg_match("#^[[:alnum:]?&=+:;_()%#/,\.-]*$#i", $parts['query'], $regs)) {
- return false;
- } else {
- return true;
- }
- }
- return false;
- }
- }
- echo '<form action="'.htmlentities($_SERVER['PHP_SELF'], ENT_QUOTES).'" method="get">';
- echo 'Enter 4 hex bytes of MPEG-audio header (ie <I>FF FA 92 44</I>)<BR>';
- echo '<input type="text" name="HeaderHexBytes" value="'.htmlentities(isset($_POST['HeaderHexBytes']) ? strtoupper($_POST['HeaderHexBytes']) : '', ENT_QUOTES).'" size="11" maxlength="11">';
- echo '<input type="submit" name="Analyze" value="Analyze"></form>';
- echo '<hr>';
- echo '<form action="'.htmlentities($_SERVER['PHP_SELF'], ENT_QUOTES).'" METHOD="get">';
- echo 'Generate a MPEG-audio 4-byte header from these values:<BR>';
- echo '<table border="0">';
- $MPEGgenerateValues = array(
- 'version'=>array('1', '2', '2.5'),
- 'layer'=>array('I', 'II', 'III'),
- 'protection'=>array('Y', 'N'),
- 'bitrate'=>array('free', '8', '16', '24', '32', '40', '48', '56', '64', '80', '96', '112', '128', '144', '160', '176', '192', '224', '256', '288', '320', '352', '384', '416', '448'),
- 'frequency'=>array('8000', '11025', '12000', '16000', '22050', '24000', '32000', '44100', '48000'),
- 'padding'=>array('Y', 'N'),
- 'private'=>array('Y', 'N'),
- 'channelmode'=>array('stereo', 'joint stereo', 'dual channel', 'mono'),
- 'modeextension'=>array('none', 'IS', 'MS', 'IS+MS', '4-31', '8-31', '12-31', '16-31'),
- 'copyright'=>array('Y', 'N'),
- 'original'=>array('Y', 'N'),
- 'emphasis'=>array('none', '50/15ms', 'CCIT J.17')
- );
- foreach ($MPEGgenerateValues as $name => $dataarray) {
- echo '<tr><th>'.$name.':</th><td><select name="'.$name.'">';
- foreach ($dataarray as $key => $value) {
- echo '<option'.((isset($_POST["$name"]) && ($_POST["$name"] == $value)) ? ' SELECTED' : '').'>'.$value.'</option>';
- }
- echo '</select></td></tr>';
- }
- if (isset($_POST['bitrate'])) {
- echo '<tr><th>Frame Length:</th><td>'.(int) MPEGaudioFrameLength($_POST['bitrate'], $_POST['version'], $_POST['layer'], (($_POST['padding'] == 'Y') ? '1' : '0'), $_POST['frequency']).'</td></tr>';
- }
- echo '</table>';
- echo '<input type="submit" name="Generate" value="Generate"></form>';
- echo '<hr>';
- if (isset($_POST['Analyze']) && $_POST['HeaderHexBytes']) {
- $headerbytearray = explode(' ', $_POST['HeaderHexBytes']);
- if (count($headerbytearray) != 4) {
- die('Invalid byte pattern');
- }
- $headerstring = '';
- foreach ($headerbytearray as $textbyte) {
- $headerstring .= chr(hexdec($textbyte));
- }
- $MP3fileInfo['error'] = '';
- $MPEGheaderRawArray = MPEGaudioHeaderDecode(substr($headerstring, 0, 4));
- if (MPEGaudioHeaderValid($MPEGheaderRawArray, true)) {
- $MP3fileInfo['raw'] = $MPEGheaderRawArray;
- $MP3fileInfo['version'] = MPEGaudioVersionLookup($MP3fileInfo['raw']['version']);
- $MP3fileInfo['layer'] = MPEGaudioLayerLookup($MP3fileInfo['raw']['layer']);
- $MP3fileInfo['protection'] = MPEGaudioCRCLookup($MP3fileInfo['raw']['protection']);
- $MP3fileInfo['bitrate'] = MPEGaudioBitrateLookup($MP3fileInfo['version'], $MP3fileInfo['layer'], $MP3fileInfo['raw']['bitrate']);
- $MP3fileInfo['frequency'] = MPEGaudioFrequencyLookup($MP3fileInfo['version'], $MP3fileInfo['raw']['sample_rate']);
- $MP3fileInfo['padding'] = (bool) $MP3fileInfo['raw']['padding'];
- $MP3fileInfo['private'] = (bool) $MP3fileInfo['raw']['private'];
- $MP3fileInfo['channelmode'] = MPEGaudioChannelModeLookup($MP3fileInfo['raw']['channelmode']);
- $MP3fileInfo['channels'] = (($MP3fileInfo['channelmode'] == 'mono') ? 1 : 2);
- $MP3fileInfo['modeextension'] = MPEGaudioModeExtensionLookup($MP3fileInfo['layer'], $MP3fileInfo['raw']['modeextension']);
- $MP3fileInfo['copyright'] = (bool) $MP3fileInfo['raw']['copyright'];
- $MP3fileInfo['original'] = (bool) $MP3fileInfo['raw']['original'];
- $MP3fileInfo['emphasis'] = MPEGaudioEmphasisLookup($MP3fileInfo['raw']['emphasis']);
- if ($MP3fileInfo['protection']) {
- $MP3fileInfo['crc'] = BigEndian2Int(substr($headerstring, 4, 2));
- }
- if ($MP3fileInfo['frequency'] > 0) {
- $MP3fileInfo['framelength'] = MPEGaudioFrameLength($MP3fileInfo['bitrate'], $MP3fileInfo['version'], $MP3fileInfo['layer'], (int) $MP3fileInfo['padding'], $MP3fileInfo['frequency']);
- }
- if ($MP3fileInfo['bitrate'] != 'free') {
- $MP3fileInfo['bitrate'] *= 1000;
- }
- } else {
- $MP3fileInfo['error'] .= "\n".'Invalid MPEG audio header';
- }
- if (!$MP3fileInfo['error']) {
- unset($MP3fileInfo['error']);
- }
- echo table_var_dump($MP3fileInfo);
- } elseif (isset($_POST['Generate'])) {
- // AAAA AAAA AAAB BCCD EEEE FFGH IIJJ KLMM
- $headerbitstream = '11111111111'; // A - Frame sync (all bits set)
- $MPEGversionLookup = array('2.5'=>'00', '2'=>'10', '1'=>'11');
- $headerbitstream .= $MPEGversionLookup[$_POST['version']]; // B - MPEG Audio version ID
- $MPEGlayerLookup = array('III'=>'01', 'II'=>'10', 'I'=>'11');
- $headerbitstream .= $MPEGlayerLookup[$_POST['layer']]; // C - Layer description
- $headerbitstream .= (($_POST['protection'] == 'Y') ? '0' : '1'); // D - Protection bit
- $MPEGaudioBitrateLookup['1']['I'] = array('free'=>'0000', '32'=>'0001', '64'=>'0010', '96'=>'0011', '128'=>'0100', '160'=>'0101', '192'=>'0110', '224'=>'0111', '256'=>'1000', '288'=>'1001', '320'=>'1010', '352'=>'1011', '384'=>'1100', '416'=>'1101', '448'=>'1110');
- $MPEGaudioBitrateLookup['1']['II'] = array('free'=>'0000', '32'=>'0001', '48'=>'0010', '56'=>'0011', '64'=>'0100', '80'=>'0101', '96'=>'0110', '112'=>'0111', '128'=>'1000', '160'=>'1001', '192'=>'1010', '224'=>'1011', '256'=>'1100', '320'=>'1101', '384'=>'1110');
- $MPEGaudioBitrateLookup['1']['III'] = array('free'=>'0000', '32'=>'0001', '40'=>'0010', '48'=>'0011', '56'=>'0100', '64'=>'0101', '80'=>'0110', '96'=>'0111', '112'=>'1000', '128'=>'1001', '160'=>'1010', '192'=>'1011', '224'=>'1100', '256'=>'1101', '320'=>'1110');
- $MPEGaudioBitrateLookup['2']['I'] = array('free'=>'0000', '32'=>'0001', '48'=>'0010', '56'=>'0011', '64'=>'0100', '80'=>'0101', '96'=>'0110', '112'=>'0111', '128'=>'1000', '144'=>'1001', '160'=>'1010', '176'=>'1011', '192'=>'1100', '224'=>'1101', '256'=>'1110');
- $MPEGaudioBitrateLookup['2']['II'] = array('free'=>'0000', '8'=>'0001', '16'=>'0010', '24'=>'0011', '32'=>'0100', '40'=>'0101', '48'=>'0110', '56'=>'0111', '64'=>'1000', '80'=>'1001', '96'=>'1010', '112'=>'1011', '128'=>'1100', '144'=>'1101', '160'=>'1110');
- $MPEGaudioBitrateLookup['2']['III'] = $MPEGaudioBitrateLookup['2']['II'];
- $MPEGaudioBitrateLookup['2.5']['I'] = $MPEGaudioBitrateLookup['2']['I'];
- $MPEGaudioBitrateLookup['2.5']['II'] = $MPEGaudioBitrateLookup['2']['II'];
- $MPEGaudioBitrateLookup['2.5']['III'] = $MPEGaudioBitrateLookup['2']['II'];
- if (isset($MPEGaudioBitrateLookup[$_POST['version']][$_POST['layer']][$_POST['bitrate']])) {
- $headerbitstream .= $MPEGaudioBitrateLookup[$_POST['version']][$_POST['layer']][$_POST['bitrate']]; // E - Bitrate index
- } else {
- die('Invalid <B>Bitrate</B>');
- }
- $MPEGaudioFrequencyLookup['1'] = array('44100'=>'00', '48000'=>'01', '32000'=>'10');
- $MPEGaudioFrequencyLookup['2'] = array('22050'=>'00', '24000'=>'01', '16000'=>'10');
- $MPEGaudioFrequencyLookup['2.5'] = array('11025'=>'00', '12000'=>'01', '8000'=>'10');
- if (isset($MPEGaudioFrequencyLookup[$_POST['version']][$_POST['frequency']])) {
- $headerbitstream .= $MPEGaudioFrequencyLookup[$_POST['version']][$_POST['frequency']]; // F - Sampling rate frequency index
- } else {
- die('Invalid <B>Frequency</B>');
- }
- $headerbitstream .= (($_POST['padding'] == 'Y') ? '1' : '0'); // G - Padding bit
- $headerbitstream .= (($_POST['private'] == 'Y') ? '1' : '0'); // H - Private bit
- $MPEGaudioChannelModeLookup = array('stereo'=>'00', 'joint stereo'=>'01', 'dual channel'=>'10', 'mono'=>'11');
- $headerbitstream .= $MPEGaudioChannelModeLookup[$_POST['channelmode']]; // I - Channel Mode
- $MPEGaudioModeExtensionLookup['I'] = array('4-31'=>'00', '8-31'=>'01', '12-31'=>'10', '16-31'=>'11');
- $MPEGaudioModeExtensionLookup['II'] = $MPEGaudioModeExtensionLookup['I'];
- $MPEGaudioModeExtensionLookup['III'] = array('none'=>'00', 'IS'=>'01', 'MS'=>'10', 'IS+MS'=>'11');
- if ($_POST['channelmode'] != 'joint stereo') {
- $headerbitstream .= '00';
- } elseif (isset($MPEGaudioModeExtensionLookup[$_POST['layer']][$_POST['modeextension']])) {
- $headerbitstream .= $MPEGaudioModeExtensionLookup[$_POST['layer']][$_POST['modeextension']]; // J - Mode extension (Only if Joint stereo)
- } else {
- die('Invalid <B>Mode Extension</B>');
- }
- $headerbitstream .= (($_POST['copyright'] == 'Y') ? '1' : '0'); // K - Copyright
- $headerbitstream .= (($_POST['original'] == 'Y') ? '1' : '0'); // L - Original
- $MPEGaudioEmphasisLookup = array('none'=>'00', '50/15ms'=>'01', 'CCIT J.17'=>'11');
- if (isset($MPEGaudioEmphasisLookup[$_POST['emphasis']])) {
- $headerbitstream .= $MPEGaudioEmphasisLookup[$_POST['emphasis']]; // M - Emphasis
- } else {
- die('Invalid <B>Emphasis</B>');
- }
- echo strtoupper(str_pad(dechex(bindec(substr($headerbitstream, 0, 8))), 2, '0', STR_PAD_LEFT)).' ';
- echo strtoupper(str_pad(dechex(bindec(substr($headerbitstream, 8, 8))), 2, '0', STR_PAD_LEFT)).' ';
- echo strtoupper(str_pad(dechex(bindec(substr($headerbitstream, 16, 8))), 2, '0', STR_PAD_LEFT)).' ';
- echo strtoupper(str_pad(dechex(bindec(substr($headerbitstream, 24, 8))), 2, '0', STR_PAD_LEFT)).'<BR>';
- }
- function MPEGaudioVersionLookup($rawversion) {
- $MPEGaudioVersionLookup = array('2.5', FALSE, '2', '1');
- return (isset($MPEGaudioVersionLookup["$rawversion"]) ? $MPEGaudioVersionLookup["$rawversion"] : FALSE);
- }
- function MPEGaudioLayerLookup($rawlayer) {
- $MPEGaudioLayerLookup = array(FALSE, 'III', 'II', 'I');
- return (isset($MPEGaudioLayerLookup["$rawlayer"]) ? $MPEGaudioLayerLookup["$rawlayer"] : FALSE);
- }
- function MPEGaudioBitrateLookup($version, $layer, $rawbitrate) {
- static $MPEGaudioBitrateLookup;
- if (empty($MPEGaudioBitrateLookup)) {
- $MPEGaudioBitrateLookup = MPEGaudioBitrateArray();
- }
- return (isset($MPEGaudioBitrateLookup["$version"]["$layer"]["$rawbitrate"]) ? $MPEGaudioBitrateLookup["$version"]["$layer"]["$rawbitrate"] : FALSE);
- }
- function MPEGaudioFrequencyLookup($version, $rawfrequency) {
- static $MPEGaudioFrequencyLookup;
- if (empty($MPEGaudioFrequencyLookup)) {
- $MPEGaudioFrequencyLookup = MPEGaudioFrequencyArray();
- }
- return (isset($MPEGaudioFrequencyLookup["$version"]["$rawfrequency"]) ? $MPEGaudioFrequencyLookup["$version"]["$rawfrequency"] : FALSE);
- }
- function MPEGaudioChannelModeLookup($rawchannelmode) {
- $MPEGaudioChannelModeLookup = array('stereo', 'joint stereo', 'dual channel', 'mono');
- return (isset($MPEGaudioChannelModeLookup["$rawchannelmode"]) ? $MPEGaudioChannelModeLookup["$rawchannelmode"] : FALSE);
- }
- function MPEGaudioModeExtensionLookup($layer, $rawmodeextension) {
- $MPEGaudioModeExtensionLookup['I'] = array('4-31', '8-31', '12-31', '16-31');
- $MPEGaudioModeExtensionLookup['II'] = array('4-31', '8-31', '12-31', '16-31');
- $MPEGaudioModeExtensionLookup['III'] = array('', 'IS', 'MS', 'IS+MS');
- return (isset($MPEGaudioModeExtensionLookup["$layer"]["$rawmodeextension"]) ? $MPEGaudioModeExtensionLookup["$layer"]["$rawmodeextension"] : FALSE);
- }
- function MPEGaudioEmphasisLookup($rawemphasis) {
- $MPEGaudioEmphasisLookup = array('none', '50/15ms', FALSE, 'CCIT J.17');
- return (isset($MPEGaudioEmphasisLookup["$rawemphasis"]) ? $MPEGaudioEmphasisLookup["$rawemphasis"] : FALSE);
- }
- function MPEGaudioCRCLookup($CRCbit) {
- // inverse boolean cast :)
- if ($CRCbit == '0') {
- return TRUE;
- } else {
- return FALSE;
- }
- }
- /////////////////////////////////////////////////////////////////
- /// getID3() by James Heinrich <info@getid3.org> //
- // available at http://getid3.sourceforge.net ///
- // or http://www.getid3.org ///
- /////////////////////////////////////////////////////////////////
- // //
- // getid3.mp3.php - part of getID3() //
- // See getid3.readme.txt for more details //
- // //
- /////////////////////////////////////////////////////////////////
- // number of frames to scan to determine if MPEG-audio sequence is valid
- // Lower this number to 5-20 for faster scanning
- // Increase this number to 50+ for most accurate detection of valid VBR/CBR
- // mpeg-audio streams
- define('MPEG_VALID_CHECK_FRAMES', 35);
- function getMP3headerFilepointer(&$fd, &$ThisFileInfo) {
- getOnlyMPEGaudioInfo($fd, $ThisFileInfo, $ThisFileInfo['avdataoffset']);
- if (isset($ThisFileInfo['mpeg']['audio']['bitrate_mode'])) {
- $ThisFileInfo['audio']['bitrate_mode'] = strtolower($ThisFileInfo['mpeg']['audio']['bitrate_mode']);
- }
- if (((isset($ThisFileInfo['id3v2']) && ($ThisFileInfo['avdataoffset'] > $ThisFileInfo['id3v2']['headerlength'])) || (!isset($ThisFileInfo['id3v2']) && ($ThisFileInfo['avdataoffset'] > 0)))) {
- $ThisFileInfo['warning'] .= "\n".'Unknown data before synch ';
- if (isset($ThisFileInfo['id3v2']['headerlength'])) {
- $ThisFileInfo['warning'] .= '(ID3v2 header ends at '.$ThisFileInfo['id3v2']['headerlength'].', then '.($ThisFileInfo['avdataoffset'] - $ThisFileInfo['id3v2']['headerlength']).' bytes garbage, ';
- } else {
- $ThisFileInfo['warning'] .= '(should be at beginning of file, ';
- }
- $ThisFileInfo['warning'] .= 'synch detected at '.$ThisFileInfo['avdataoffset'].')';
- if ($ThisFileInfo['audio']['bitrate_mode'] == 'cbr') {
- if (!empty($ThisFileInfo['id3v2']['headerlength']) && (($ThisFileInfo['avdataoffset'] - $ThisFileInfo['id3v2']['headerlength']) == $ThisFileInfo['mpeg']['audio']['framelength'])) {
- $ThisFileInfo['warning'] .= '. This is a known problem with some versions of LAME (3.91, 3.92) DLL in CBR mode.';
- $ThisFileInfo['audio']['codec'] = 'LAME';
- } elseif (empty($ThisFileInfo['id3v2']['headerlength']) && ($ThisFileInfo['avdataoffset'] == $ThisFileInfo['mpeg']['audio']['framelength'])) {
- $ThisFileInfo['warning'] .= '. This is a known problem with some versions of LAME (3.91, 3.92) DLL in CBR mode.';
- $ThisFileInfo['audio']['codec'] = 'LAME';
- }
- }
- }
- if (isset($ThisFileInfo['mpeg']['audio']['layer']) && ($ThisFileInfo['mpeg']['audio']['layer'] == 'II')) {
- $ThisFileInfo['audio']['dataformat'] = 'mp2';
- } elseif (isset($ThisFileInfo['mpeg']['audio']['layer']) && ($ThisFileInfo['mpeg']['audio']['layer'] == 'I')) {
- $ThisFileInfo['audio']['dataformat'] = 'mp1';
- }
- if ($ThisFileInfo['fileformat'] == 'mp3') {
- switch ($ThisFileInfo['audio']['dataformat']) {
- case 'mp1':
- case 'mp2':
- case 'mp3':
- $ThisFileInfo['fileformat'] = $ThisFileInfo['audio']['dataformat'];
- break;
- default:
- $ThisFileInfo['warning'] .= "\n".'Expecting [audio][dataformat] to be mp1/mp2/mp3 when fileformat == mp3, [audio][dataformat] actually "'.$ThisFileInfo['audio']['dataformat'].'"';
- break;
- }
- }
- if (empty($ThisFileInfo['fileformat'])) {
- $ThisFileInfo['error'] .= "\n".'Synch not found';
- unset($ThisFileInfo['fileformat']);
- unset($ThisFileInfo['audio']['bitrate_mode']);
- unset($ThisFileInfo['avdataoffset']);
- unset($ThisFileInfo['avdataend']);
- return false;
- }
- $ThisFileInfo['mime_type'] = 'audio/mpeg';
- $ThisFileInfo['audio']['lossless'] = false;
- // Calculate playtime
- if (!isset($ThisFileInfo['playtime_seconds']) && isset($ThisFileInfo['audio']['bitrate']) && ($ThisFileInfo['audio']['bitrate'] > 0)) {
- $ThisFileInfo['playtime_seconds'] = ($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8 / $ThisFileInfo['audio']['bitrate'];
- }
- if (isset($ThisFileInfo['mpeg']['audio']['LAME'])) {
- $ThisFileInfo['audio']['codec'] = 'LAME';
- if (!empty($ThisFileInfo['mpeg']['audio']['LAME']['long_version'])) {
- $ThisFileInfo['audio']['encoder'] = trim($ThisFileInfo['mpeg']['audio']['LAME']['long_version']);
- }
- }
- return true;
- }
- function decodeMPEGaudioHeader($fd, $offset, &$ThisFileInfo, $recursivesearch=true, $ScanAsCBR=false, $FastMPEGheaderScan=false) {
- static $MPEGaudioVersionLookup;
- static $MPEGaudioLayerLookup;
- static $MPEGaudioBitrateLookup;
- static $MPEGaudioFrequencyLookup;
- static $MPEGaudioChannelModeLookup;
- static $MPEGaudioModeExtensionLookup;
- static $MPEGaudioEmphasisLookup;
- if (empty($MPEGaudioVersionLookup)) {
- $MPEGaudioVersionLookup = MPEGaudioVersionArray();
- $MPEGaudioLayerLookup = MPEGaudioLayerArray();
- $MPEGaudioBitrateLookup = MPEGaudioBitrateArray();
- $MPEGaudioFrequencyLookup = MPEGaudioFrequencyArray();
- $MPEGaudioChannelModeLookup = MPEGaudioChannelModeArray();
- $MPEGaudioModeExtensionLookup = MPEGaudioModeExtensionArray();
- $MPEGaudioEmphasisLookup = MPEGaudioEmphasisArray();
- }
- if ($offset >= $ThisFileInfo['avdataend']) {
- $ThisFileInfo['error'] .= "\n".'end of file encounter looking for MPEG synch';
- return false;
- }
- fseek($fd, $offset, SEEK_SET);
- $headerstring = fread($fd, 1441); // worse-case max length = 32kHz @ 320kbps layer 3 = 1441 bytes/frame
- // MP3 audio frame structure:
- // $aa $aa $aa $aa [$bb $bb] $cc...
- // where $aa..$aa is the four-byte mpeg-audio header (below)
- // $bb $bb is the optional 2-byte CRC
- // and $cc... is the audio data
- $head4 = substr($headerstring, 0, 4);
- static $MPEGaudioHeaderDecodeCache = array();
- if (isset($MPEGaudioHeaderDecodeCache[$head4])) {
- $MPEGheaderRawArray = $MPEGaudioHeaderDecodeCache[$head4];
- } else {
- $MPEGheaderRawArray = MPEGaudioHeaderDecode($head4);
- $MPEGaudioHeaderDecodeCache[$head4] = $MPEGheaderRawArray;
- }
- static $MPEGaudioHeaderValidCache = array();
- // Not in cache
- if (!isset($MPEGaudioHeaderValidCache[$head4])) {
- $MPEGaudioHeaderValidCache[$head4] = MPEGaudioHeaderValid($MPEGheaderRawArray);
- }
- if ($MPEGaudioHeaderValidCache[$head4]) {
- $ThisFileInfo['mpeg']['audio']['raw'] = $MPEGheaderRawArray;
- } else {
- $ThisFileInfo['error'] .= "\n".'Invalid MPEG audio header at offset '.$offset;
- return false;
- }
- if (!$FastMPEGheaderScan) {
- $ThisFileInfo['mpeg']['audio']['version'] = $MPEGaudioVersionLookup[$ThisFileInfo['mpeg']['audio']['raw']['version']];
- $ThisFileInfo['mpeg']['audio']['layer'] = $MPEGaudioLayerLookup[$ThisFileInfo['mpeg']['audio']['raw']['layer']];
- $ThisFileInfo['mpeg']['audio']['channelmode'] = $MPEGaudioChannelModeLookup[$ThisFileInfo['mpeg']['audio']['raw']['channelmode']];
- $ThisFileInfo['mpeg']['audio']['channels'] = (($ThisFileInfo['mpeg']['audio']['channelmode'] == 'mono') ? 1 : 2);
- $ThisFileInfo['mpeg']['audio']['sample_rate'] = $MPEGaudioFrequencyLookup[$ThisFileInfo['mpeg']['audio']['version']][$ThisFileInfo['mpeg']['audio']['raw']['sample_rate']];
- $ThisFileInfo['mpeg']['audio']['protection'] = !$ThisFileInfo['mpeg']['audio']['raw']['protection'];
- $ThisFileInfo['mpeg']['audio']['private'] = (bool) $ThisFileInfo['mpeg']['audio']['raw']['private'];
- $ThisFileInfo['mpeg']['audio']['modeextension'] = $MPEGaudioModeExtensionLookup[$ThisFileInfo['mpeg']['audio']['layer']][$ThisFileInfo['mpeg']['audio']['raw']['modeextension']];
- $ThisFileInfo['mpeg']['audio']['copyright'] = (bool) $ThisFileInfo['mpeg']['audio']['raw']['copyright'];
- $ThisFileInfo['mpeg']['audio']['original'] = (bool) $ThisFileInfo['mpeg']['audio']['raw']['original'];
- $ThisFileInfo['mpeg']['audio']['emphasis'] = $MPEGaudioEmphasisLookup[$ThisFileInfo['mpeg']['audio']['raw']['emphasis']];
- $ThisFileInfo['audio']['channels'] = $ThisFileInfo['mpeg']['audio']['channels'];
- $ThisFileInfo['audio']['sample_rate'] = $ThisFileInfo['mpeg']['audio']['sample_rate'];
- if ($ThisFileInfo['mpeg']['audio']['protection']) {
- $ThisFileInfo['mpeg']['audio']['crc'] = BigEndian2Int(substr($headerstring, 4, 2));
- }
- }
- if ($ThisFileInfo['mpeg']['audio']['raw']['bitrate'] == 15) {
- // http://www.hydrogenaudio.org/?act=ST&f=16&t=9682&st=0
- $ThisFileInfo['warning'] .= "\n".'Invalid bitrate index (15), this is a known bug in free-format MP3s encoded by LAME v3.90 - 3.93.1';
- $ThisFileInfo['mpeg']['audio']['raw']['bitrate'] = 0;
- }
- $ThisFileInfo['mpeg']['audio']['padding'] = (bool) $ThisFileInfo['mpeg']['audio']['raw']['padding'];
- $ThisFileInfo['mpeg']['audio']['bitrate'] = $MPEGaudioBitrateLookup[$ThisFileInfo['mpeg']['audio']['version']][$ThisFileInfo['mpeg']['audio']['layer']][$ThisFileInfo['mpeg']['audio']['raw']['bitrate']];
- if (($ThisFileInfo['mpeg']['audio']['bitrate'] == 'free') && ($offset == $ThisFileInfo['avdataoffset'])) {
- // only skip multiple frame check if free-format bitstream found at beginning of file
- // otherwise is quite possibly simply corrupted data
- $recursivesearch = false;
- }
- // For Layer II there are some combinations of bitrate and mode which are not allowed.
- if (!$FastMPEGheaderScan && ($ThisFileInfo['mpeg']['audio']['layer'] == 'II')) {
- $ThisFileInfo['audio']['dataformat'] = 'mp2';
- switch ($ThisFileInfo['mpeg']['audio']['channelmode']) {
- case 'mono':
- if (($ThisFileInfo['mpeg']['audio']['bitrate'] == 'free') || ($ThisFileInfo['mpeg']['audio']['bitrate'] <= 192)) {
- // these are ok
- } else {
- $ThisFileInfo['error'] .= "\n".$ThisFileInfo['mpeg']['audio']['bitrate'].'kbps not allowed in Layer II, '.$ThisFileInfo['mpeg']['audio']['channelmode'].'.';
- return false;
- }
- break;
- case 'stereo':
- case 'joint stereo':
- case 'dual channel':
- if (($ThisFileInfo['mpeg']['audio']['bitrate'] == 'free') || ($ThisFileInfo['mpeg']['audio']['bitrate'] == 64) || ($ThisFileInfo['mpeg']['audio']['bitrate'] >= 96)) {
- // these are ok
- } else {
- $ThisFileInfo['error'] .= "\n".$ThisFileInfo['mpeg']['audio']['bitrate'].'kbps not allowed in Layer II, '.$ThisFileInfo['mpeg']['audio']['channelmode'].'.';
- return false;
- }
- break;
- }
- }
- if (