78 lines
No EOL
3.6 KiB
PHP
78 lines
No EOL
3.6 KiB
PHP
<?php
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/////////////////////////////////////////////////////////////////
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/// getID3() by James Heinrich <info@getid3.org> //
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// available at http://getid3.sourceforge.net //
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// or http://www.getid3.org //
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/////////////////////////////////////////////////////////////////
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// See readme.txt for more details //
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/////////////////////////////////////////////////////////////////
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// //
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// module.audio-video.matriska.php //
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// module for analyzing Matroska containers //
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// dependencies: NONE //
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// ///
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/////////////////////////////////////////////////////////////////
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class getid3_matroska
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{
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function getid3_matroska(&$fd, &$ThisFileInfo) {
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$ThisFileInfo['fileformat'] = 'matroska';
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fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET);
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//$ThisFileInfo['matroska']['raw']['a'] = $this->EBML2Int(fread($fd, 4));
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$ThisFileInfo['error'][] = 'Mastroka parsing not enabled in this version of getID3()';
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return false;
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}
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function EBML2Int($EBMLstring) {
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// http://matroska.org/specs/
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// Element ID coded with an UTF-8 like system:
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// 1xxx xxxx - Class A IDs (2^7 -2 possible values) (base 0x8X)
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// 01xx xxxx xxxx xxxx - Class B IDs (2^14-2 possible values) (base 0x4X 0xXX)
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// 001x xxxx xxxx xxxx xxxx xxxx - Class C IDs (2^21-2 possible values) (base 0x2X 0xXX 0xXX)
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// 0001 xxxx xxxx xxxx xxxx xxxx xxxx xxxx - Class D IDs (2^28-2 possible values) (base 0x1X 0xXX 0xXX 0xXX)
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// Values with all x at 0 and 1 are reserved (hence the -2).
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// Data size, in octets, is also coded with an UTF-8 like system :
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// 1xxx xxxx - value 0 to 2^7-2
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// 01xx xxxx xxxx xxxx - value 0 to 2^14-2
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// 001x xxxx xxxx xxxx xxxx xxxx - value 0 to 2^21-2
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// 0001 xxxx xxxx xxxx xxxx xxxx xxxx xxxx - value 0 to 2^28-2
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// 0000 1xxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx - value 0 to 2^35-2
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// 0000 01xx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx - value 0 to 2^42-2
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// 0000 001x xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx - value 0 to 2^49-2
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// 0000 0001 xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx - value 0 to 2^56-2
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if (0x80 & ord($EBMLstring{0})) {
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$EBMLstring{0} = chr(ord($EBMLstring{0}) & 0x7F);
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} elseif (0x40 & ord($EBMLstring{0})) {
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$EBMLstring{0} = chr(ord($EBMLstring{0}) & 0x3F);
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} elseif (0x20 & ord($EBMLstring{0})) {
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$EBMLstring{0} = chr(ord($EBMLstring{0}) & 0x1F);
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} elseif (0x10 & ord($EBMLstring{0})) {
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$EBMLstring{0} = chr(ord($EBMLstring{0}) & 0x0F);
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} elseif (0x08 & ord($EBMLstring{0})) {
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$EBMLstring{0} = chr(ord($EBMLstring{0}) & 0x07);
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} elseif (0x04 & ord($EBMLstring{0})) {
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$EBMLstring{0} = chr(ord($EBMLstring{0}) & 0x03);
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} elseif (0x02 & ord($EBMLstring{0})) {
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$EBMLstring{0} = chr(ord($EBMLstring{0}) & 0x01);
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} elseif (0x01 & ord($EBMLstring{0})) {
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$EBMLstring{0} = chr(ord($EBMLstring{0}) & 0x00);
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} else {
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return false;
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}
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return getid3_lib::BigEndian2Int($EBMLstring);
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}
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}
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?>
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