ILIAS  release_5-1 Revision 5.0.0-5477-g43f3e3fab5f
module.audio-video.matroska.php
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1<?php
4// available at http://getid3.sourceforge.net //
5// or http://www.getid3.org //
7// See readme.txt for more details //
9// //
10// module.audio-video.matriska.php //
11// module for analyzing Matroska containers //
12// dependencies: NONE //
13// ///
15
16
18{
19
20 function getid3_matroska(&$fd, &$ThisFileInfo) {
21
22 $ThisFileInfo['fileformat'] = 'matroska';
23
24 fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET);
25
26 //$ThisFileInfo['matroska']['raw']['a'] = $this->EBML2Int(fread($fd, 4));
27
28 $ThisFileInfo['error'][] = 'Mastroka parsing not enabled in this version of getID3()';
29 return false;
30
31 }
32
33
34 function EBML2Int($EBMLstring) {
35 // http://matroska.org/specs/
36
37 // Element ID coded with an UTF-8 like system:
38 // 1xxx xxxx - Class A IDs (2^7 -2 possible values) (base 0x8X)
39 // 01xx xxxx xxxx xxxx - Class B IDs (2^14-2 possible values) (base 0x4X 0xXX)
40 // 001x xxxx xxxx xxxx xxxx xxxx - Class C IDs (2^21-2 possible values) (base 0x2X 0xXX 0xXX)
41 // 0001 xxxx xxxx xxxx xxxx xxxx xxxx xxxx - Class D IDs (2^28-2 possible values) (base 0x1X 0xXX 0xXX 0xXX)
42 // Values with all x at 0 and 1 are reserved (hence the -2).
43
44 // Data size, in octets, is also coded with an UTF-8 like system :
45 // 1xxx xxxx - value 0 to 2^7-2
46 // 01xx xxxx xxxx xxxx - value 0 to 2^14-2
47 // 001x xxxx xxxx xxxx xxxx xxxx - value 0 to 2^21-2
48 // 0001 xxxx xxxx xxxx xxxx xxxx xxxx xxxx - value 0 to 2^28-2
49 // 0000 1xxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx - value 0 to 2^35-2
50 // 0000 01xx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx - value 0 to 2^42-2
51 // 0000 001x xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx - value 0 to 2^49-2
52 // 0000 0001 xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx - value 0 to 2^56-2
53
54 if (0x80 & ord($EBMLstring{0})) {
55 $EBMLstring{0} = chr(ord($EBMLstring{0}) & 0x7F);
56 } elseif (0x40 & ord($EBMLstring{0})) {
57 $EBMLstring{0} = chr(ord($EBMLstring{0}) & 0x3F);
58 } elseif (0x20 & ord($EBMLstring{0})) {
59 $EBMLstring{0} = chr(ord($EBMLstring{0}) & 0x1F);
60 } elseif (0x10 & ord($EBMLstring{0})) {
61 $EBMLstring{0} = chr(ord($EBMLstring{0}) & 0x0F);
62 } elseif (0x08 & ord($EBMLstring{0})) {
63 $EBMLstring{0} = chr(ord($EBMLstring{0}) & 0x07);
64 } elseif (0x04 & ord($EBMLstring{0})) {
65 $EBMLstring{0} = chr(ord($EBMLstring{0}) & 0x03);
66 } elseif (0x02 & ord($EBMLstring{0})) {
67 $EBMLstring{0} = chr(ord($EBMLstring{0}) & 0x01);
68 } elseif (0x01 & ord($EBMLstring{0})) {
69 $EBMLstring{0} = chr(ord($EBMLstring{0}) & 0x00);
70 } else {
71 return false;
72 }
73 return getid3_lib::BigEndian2Int($EBMLstring);
74 }
75
76}
77
78?>
fseek($bytes, $whence=SEEK_SET)
Definition: getid3.php:1697
BigEndian2Int($byteword, $synchsafe=false, $signed=false)
Definition: getid3.lib.php:234
getID3() by James Heinrich info@getid3.org //
getid3_matroska(&$fd, &$ThisFileInfo)