xref: /dflybsd-src/contrib/file/magic/Magdir/vorbis (revision 90ea502b8c5d21f908cedff6680ee2bc9e74ce74)
1
2#------------------------------------------------------------------------------
3# vorbis:  file(1) magic for Ogg/Vorbis files
4#
5# From Felix von Leitner <leitner@fefe.de>
6# Extended by Beni Cherniavsky <cben@crosswinds.net>
7# Further extended by Greg Wooledge <greg@wooledge.org>
8#
9# Most (everything but the number of channels and bitrate) is commented
10# out with `##' as it's not interesting to the average user.  The most
11# probable things advanced users would want to uncomment are probably
12# the number of comments and the encoder version.
13#
14# FIXME: The first match has been made a search, so that it can skip
15# over prepended ID3 tags. This will work for MIME type detection, but
16# won't work for detecting other properties of the file (they all need
17# to be made relative to the search). In any case, if the file has ID3
18# tags, the ID3 information will be printed, not the Ogg information,
19# so until that's fixed, this doesn't matter.
20# FIXME[2]: Disable the above for now, since search assumes text mode.
21#
22# --- Ogg Framing ---
23#0		search/1000	OggS		Ogg data
240		string	OggS		Ogg data
25!:mime		application/ogg
26>4		byte		!0		UNKNOWN REVISION %u
27##>4		byte		0		revision 0
28>4		byte		0
29##>>14		lelong		x		(Serial %lX)
30# non-Vorbis content: FLAC (Free Lossless Audio Codec, http://flac.sourceforge.net)
31>>28		string		\x7fFLAC	\b, FLAC audio
32# non-Vorbis content: Theora
33>>28		string		\x80theora	\b, Theora video
34# non-Vorbis content: Kate
35>>28		string		\x80kate\0\0\0\0	\b, Kate
36>>>37		ubyte		x		v%u
37>>>38		ubyte		x		\b.%u,
38>>>40		byte		0		utf8 encoding,
39>>>40		byte		!0		unknown character encoding,
40>>>60		string		>\0		language %s,
41>>>60		string		\0		no language set,
42>>>76		string		>\0		category %s
43>>>76		string		\0		no category set
44# non-Vorbis content: Skeleton
45>>28		string		fishead\0	\b, Skeleton
46>>>36		short		x		v%u
47>>>40		short		x		\b.%u
48# non-Vorbis content: Speex
49>>28		string		Speex\ \ \ 	\b, Speex audio
50# non-Vorbis content: OGM
51>>28		string		\x01video\0\0\0	\b, OGM video
52>>>37		string/c	div3		(DivX 3)
53>>>37		string/c	divx		(DivX 4)
54>>>37		string/c	dx50		(DivX 5)
55>>>37		string/c	xvid		(XviD)
56# --- First vorbis packet - general header ---
57>>28		string		\x01vorbis	\b, Vorbis audio,
58>>>35		lelong		!0		UNKNOWN VERSION %lu,
59##>>>35		lelong		0		version 0,
60>>>35		lelong		0
61>>>>39		ubyte		1		mono,
62>>>>39		ubyte		2		stereo,
63>>>>39		ubyte		>2		%u channels,
64>>>>40		lelong		x		%lu Hz
65# Minimal, nominal and maximal bitrates specified when encoding
66>>>>48		string		<\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff	\b,
67# The above tests if at least one of these is specified:
68>>>>>52		lelong		!-1
69# Vorbis RC2 has a bug which puts -1000 in the min/max bitrate fields
70# instead of -1.
71# Vorbis 1.0 uses 0 instead of -1.
72>>>>>>52	lelong		!0
73>>>>>>>52	lelong		!-1000
74>>>>>>>>52	lelong		x		<%lu
75>>>>>48		lelong		!-1
76>>>>>>48	lelong		x		~%lu
77>>>>>44		lelong		!-1
78>>>>>>44	lelong		!-1000
79>>>>>>>44	lelong		!0
80>>>>>>>>44	lelong		x		>%lu
81>>>>>48		string		<\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff	bps
82# -- Second vorbis header packet - the comments
83# A kludge to read the vendor string.  It's a counted string, not a
84# zero-terminated one, so file(1) can't read it in a generic way.
85# libVorbis is the only one existing currently, so I detect specifically
86# it.  The interesting value is the cvs date (8 digits decimal).
87# Post-RC1 Ogg files have the second header packet (and thus the version)
88# in a different place, so we must use an indirect offset.
89>>>(84.b+85)		string		\x03vorbis
90>>>>(84.b+96)		string/c	Xiphophorus\ libVorbis\ I	\b, created by: Xiphophorus libVorbis I
91>>>>>(84.b+120)		string		>00000000
92# Map to beta version numbers:
93>>>>>>(84.b+120)	string		<20000508	(<beta1, prepublic)
94>>>>>>(84.b+120)	string		20000508	(1.0 beta 1 or beta 2)
95>>>>>>(84.b+120)	string		>20000508
96>>>>>>>(84.b+120)	string		<20001031	(beta2-3)
97>>>>>>(84.b+120)	string		20001031	(1.0 beta 3)
98>>>>>>(84.b+120)	string		>20001031
99>>>>>>>(84.b+120)	string		<20010225	(beta3-4)
100>>>>>>(84.b+120)	string		20010225	(1.0 beta 4)
101>>>>>>(84.b+120)	string		>20010225
102>>>>>>>(84.b+120)	string		<20010615	(beta4-RC1)
103>>>>>>(84.b+120)	string		20010615	(1.0 RC1)
104>>>>>>(84.b+120)	string		20010813	(1.0 RC2)
105>>>>>>(84.b+120)	string		20010816	(RC2 - Garf tuned v1)
106>>>>>>(84.b+120)	string		20011014	(RC2 - Garf tuned v2)
107>>>>>>(84.b+120)	string		20011217	(1.0 RC3)
108>>>>>>(84.b+120)	string		20011231	(1.0 RC3)
109# Some pre-1.0 CVS snapshots still had "Xiphphorus"...
110>>>>>>(84.b+120)	string		>20011231	(pre-1.0 CVS)
111# For the 1.0 release, Xiphophorus is replaced by Xiph.Org
112>>>>(84.b+96)		string/c	Xiph.Org\ libVorbis\ I	\b, created by: Xiph.Org libVorbis I
113>>>>>(84.b+117)		string		>00000000
114>>>>>>(84.b+117)	string		<20020717	(pre-1.0 CVS)
115>>>>>>(84.b+117)	string		20020717	(1.0)
116>>>>>>(84.b+117)	string		20030909	(1.0.1)
117>>>>>>(84.b+117)	string		20040629	(1.1.0 RC1)
118