2 #------------------------------------------------------------------------------
3 # $File: vorbis,v 1.16 2009/09/19 16:28:13 christos Exp $
4 # vorbis: file(1) magic for Ogg/Vorbis files
6 # From Felix von Leitner <leitner@fefe.de>
7 # Extended by Beni Cherniavsky <cben@crosswinds.net>
8 # Further extended by Greg Wooledge <greg@wooledge.org>
10 # Most (everything but the number of channels and bitrate) is commented
11 # out with `##' as it's not interesting to the average user. The most
12 # probable things advanced users would want to uncomment are probably
13 # the number of comments and the encoder version.
15 # FIXME: The first match has been made a search, so that it can skip
16 # over prepended ID3 tags. This will work for MIME type detection, but
17 # won't work for detecting other properties of the file (they all need
18 # to be made relative to the search). In any case, if the file has ID3
19 # tags, the ID3 information will be printed, not the Ogg information,
20 # so until that's fixed, this doesn't matter.
21 # FIXME[2]: Disable the above for now, since search assumes text mode.
24 #0 search/1000 OggS Ogg data
25 0 string OggS Ogg data
26 !:mime application/ogg
27 >4 byte !0 UNKNOWN REVISION %u
28 ##>4 byte 0 revision 0
30 ##>>14 lelong x (Serial %lX)
31 # non-Vorbis content: FLAC (Free Lossless Audio Codec, http://flac.sourceforge.net)
32 >>28 string \x7fFLAC \b, FLAC audio
33 # non-Vorbis content: Theora
34 >>28 string \x80theora \b, Theora video
35 # non-Vorbis content: Kate
36 >>28 string \x80kate\0\0\0\0 \b, Kate
39 >>>40 byte 0 utf8 encoding,
40 >>>40 byte !0 unknown character encoding,
41 >>>60 string >\0 language %s,
42 >>>60 string \0 no language set,
43 >>>76 string >\0 category %s
44 >>>76 string \0 no category set
45 # non-Vorbis content: Skeleton
46 >>28 string fishead\0 \b, Skeleton
49 # non-Vorbis content: Speex
50 >>28 string Speex\ \ \ \b, Speex audio
51 # non-Vorbis content: OGM
52 >>28 string \x01video\0\0\0 \b, OGM video
53 >>>37 string/c div3 (DivX 3)
54 >>>37 string/c divx (DivX 4)
55 >>>37 string/c dx50 (DivX 5)
56 >>>37 string/c xvid (XviD)
57 # --- First vorbis packet - general header ---
58 >>28 string \x01vorbis \b, Vorbis audio,
59 >>>35 lelong !0 UNKNOWN VERSION %lu,
60 ##>>>35 lelong 0 version 0,
63 >>>>39 ubyte 2 stereo,
64 >>>>39 ubyte >2 %u channels,
65 >>>>40 lelong x %lu Hz
66 # Minimal, nominal and maximal bitrates specified when encoding
67 >>>>48 string <\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff \b,
68 # The above tests if at least one of these is specified:
70 # Vorbis RC2 has a bug which puts -1000 in the min/max bitrate fields
72 # Vorbis 1.0 uses 0 instead of -1.
74 >>>>>>>52 lelong !-1000
75 >>>>>>>>52 lelong x <%lu
77 >>>>>>48 lelong x ~%lu
79 >>>>>>44 lelong !-1000
81 >>>>>>>>44 lelong x >%lu
82 >>>>>48 string <\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff bps
83 # -- Second vorbis header packet - the comments
84 # A kludge to read the vendor string. It's a counted string, not a
85 # zero-terminated one, so file(1) can't read it in a generic way.
86 # libVorbis is the only one existing currently, so I detect specifically
87 # it. The interesting value is the cvs date (8 digits decimal).
88 # Post-RC1 Ogg files have the second header packet (and thus the version)
89 # in a different place, so we must use an indirect offset.
90 >>>(84.b+85) string \x03vorbis
91 >>>>(84.b+96) string/c Xiphophorus\ libVorbis\ I \b, created by: Xiphophorus libVorbis I
92 >>>>>(84.b+120) string >00000000
93 # Map to beta version numbers:
94 >>>>>>(84.b+120) string <20000508 (<beta1, prepublic)
95 >>>>>>(84.b+120) string 20000508 (1.0 beta 1 or beta 2)
96 >>>>>>(84.b+120) string >20000508
97 >>>>>>>(84.b+120) string <20001031 (beta2-3)
98 >>>>>>(84.b+120) string 20001031 (1.0 beta 3)
99 >>>>>>(84.b+120) string >20001031
100 >>>>>>>(84.b+120) string <20010225 (beta3-4)
101 >>>>>>(84.b+120) string 20010225 (1.0 beta 4)
102 >>>>>>(84.b+120) string >20010225
103 >>>>>>>(84.b+120) string <20010615 (beta4-RC1)
104 >>>>>>(84.b+120) string 20010615 (1.0 RC1)
105 >>>>>>(84.b+120) string 20010813 (1.0 RC2)
106 >>>>>>(84.b+120) string 20010816 (RC2 - Garf tuned v1)
107 >>>>>>(84.b+120) string 20011014 (RC2 - Garf tuned v2)
108 >>>>>>(84.b+120) string 20011217 (1.0 RC3)
109 >>>>>>(84.b+120) string 20011231 (1.0 RC3)
110 # Some pre-1.0 CVS snapshots still had "Xiphphorus"...
111 >>>>>>(84.b+120) string >20011231 (pre-1.0 CVS)
112 # For the 1.0 release, Xiphophorus is replaced by Xiph.Org
113 >>>>(84.b+96) string/c Xiph.Org\ libVorbis\ I \b, created by: Xiph.Org libVorbis I
114 >>>>>(84.b+117) string >00000000
115 >>>>>>(84.b+117) string <20020717 (pre-1.0 CVS)
116 >>>>>>(84.b+117) string 20020717 (1.0)
117 >>>>>>(84.b+117) string 20030909 (1.0.1)
118 >>>>>>(84.b+117) string 20040629 (1.1.0 RC1)