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<?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-video.matriska.php //
// module for analyzing Matroska containers //
// dependencies: NONE //
// ///
/////////////////////////////////////////////////////////////////
class getid3_matroska
{
function getid3_matroska(&$fd, &$ThisFileInfo) {
$ThisFileInfo['fileformat'] = 'matroska';
fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET);
//$ThisFileInfo['matroska']['raw']['a'] = $this->EBML2Int(fread($fd, 4));
$ThisFileInfo['error'][] = 'Mastroka parsing not enabled in this version of getID3()';
return false;
}
function EBML2Int($EBMLstring) {
// http://matroska.org/specs/
// Element ID coded with an UTF-8 like system:
// 1xxx xxxx - Class A IDs (2^7 -2 possible values) (base 0x8X)
// 01xx xxxx xxxx xxxx - Class B IDs (2^14-2 possible values) (base 0x4X 0xXX)
// 001x xxxx xxxx xxxx xxxx xxxx - Class C IDs (2^21-2 possible values) (base 0x2X 0xXX 0xXX)
// 0001 xxxx xxxx xxxx xxxx xxxx xxxx xxxx - Class D IDs (2^28-2 possible values) (base 0x1X 0xXX 0xXX 0xXX)
// Values with all x at 0 and 1 are reserved (hence the -2).
// Data size, in octets, is also coded with an UTF-8 like system :
// 1xxx xxxx - value 0 to 2^7-2
// 01xx xxxx xxxx xxxx - value 0 to 2^14-2
// 001x xxxx xxxx xxxx xxxx xxxx - value 0 to 2^21-2
// 0001 xxxx xxxx xxxx xxxx xxxx xxxx xxxx - value 0 to 2^28-2
// 0000 1xxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx - value 0 to 2^35-2
// 0000 01xx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx - value 0 to 2^42-2
// 0000 001x xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx - value 0 to 2^49-2
// 0000 0001 xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx - value 0 to 2^56-2
if (0x80 & ord($EBMLstring{0})) {
$EBMLstring{0} = chr(ord($EBMLstring{0}) & 0x7F);
} elseif (0x40 & ord($EBMLstring{0})) {
$EBMLstring{0} = chr(ord($EBMLstring{0}) & 0x3F);
} elseif (0x20 & ord($EBMLstring{0})) {
$EBMLstring{0} = chr(ord($EBMLstring{0}) & 0x1F);
} elseif (0x10 & ord($EBMLstring{0})) {
$EBMLstring{0} = chr(ord($EBMLstring{0}) & 0x0F);
} elseif (0x08 & ord($EBMLstring{0})) {
$EBMLstring{0} = chr(ord($EBMLstring{0}) & 0x07);
} elseif (0x04 & ord($EBMLstring{0})) {
$EBMLstring{0} = chr(ord($EBMLstring{0}) & 0x03);
} elseif (0x02 & ord($EBMLstring{0})) {
$EBMLstring{0} = chr(ord($EBMLstring{0}) & 0x01);
} elseif (0x01 & ord($EBMLstring{0})) {
$EBMLstring{0} = chr(ord($EBMLstring{0}) & 0x00);
} else {
return false;
}
return getid3_lib::BigEndian2Int($EBMLstring);
}
}
?>
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