#------------------------------------------------------------------------------# vorbis:  file(1) magic for Ogg/Vorbis files## From Felix von Leitner <leitner@fefe.de># Extended by Beni Cherniavsky <cben@crosswinds.net># Further extended by Greg Wooledge <greg@wooledge.org>## Most (everything but the number of channels and bitrate) is commented# out with `##' as it's not interesting to the average user.  The most# probable things advanced users would want to uncomment are probably# the number of comments and the encoder version.## --- Ogg Framing ---0		string		OggS		Ogg data>4		byte		!0		UNKNOWN REVISION %u##>4		byte		0		revision 0>4		byte		0##>>14		lelong		x		(Serial %lX)# non-Vorbis content: FLAC (Free Lossless Audio Codec, http://flac.sourceforge.net)>>28		string		fLaC		\b, FLAC audio# non-Vorbis content: Theora>>28		string		\x80theora	\b, Theora video# non-Vorbis content: Speex>>28		string		Speex\ \ \ 	\b, Speex audio# non-Vorbis content: OGM>>28		string		\x01video\0\0\0	\b, OGM video>>>37		string/c	div3		(DivX 3)>>>37		string/c	divx		(DivX 4)>>>37		string/c	dx50		(DivX 5)>>>37		string/c	xvid		(XviD)# --- First vorbis packet - general header --->>28		string		\x01vorbis	\b, Vorbis audio,>>>35		lelong		!0		UNKNOWN VERSION %lu,##>>>35		lelong		0		version 0,>>>35		lelong		0>>>>39		ubyte		1		mono,>>>>39		ubyte		2		stereo,>>>>39		ubyte		>2		%u channels,>>>>40		lelong		x		%lu Hz# Minimal, nominal and maximal bitrates specified when encoding>>>>48		string		<\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff	\b,# The above tests if at least one of these is specified:>>>>>52		lelong		!-1# Vorbis RC2 has a bug which puts -1000 in the min/max bitrate fields# instead of -1.# Vorbis 1.0 uses 0 instead of -1.>>>>>>52	lelong		!0>>>>>>>52	lelong		!-1000>>>>>>>>52	lelong		x		<%lu>>>>>48		lelong		!-1>>>>>>48	lelong		x		~%lu>>>>>44		lelong		!-1>>>>>>44	lelong		!-1000>>>>>>>44	lelong		!0>>>>>>>>44	lelong		x		>%lu>>>>>48		string		<\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff	bps# -- Second vorbis header packet - the comments# A kludge to read the vendor string.  It's a counted string, not a# zero-terminated one, so file(1) can't read it in a generic way.# libVorbis is the only one existing currently, so I detect specifically# it.  The interesting value is the cvs date (8 digits decimal).# Post-RC1 Ogg files have the second header packet (and thus the version)# in a different place, so we must use an indirect offset.>>>(84.b+85)		string		\x03vorbis>>>>(84.b+96)		string/c	Xiphophorus\ libVorbis\ I	\b, created by: Xiphophorus libVorbis I>>>>>(84.b+120)		string		>00000000	# Map to beta version numbers:>>>>>>(84.b+120)	string		<20000508	(<beta1, prepublic)>>>>>>(84.b+120)	string		20000508	(1.0 beta 1 or beta 2)>>>>>>(84.b+120)	string		>20000508>>>>>>>(84.b+120)	string		<20001031	(beta2-3)>>>>>>(84.b+120)	string		20001031	(1.0 beta 3)>>>>>>(84.b+120)	string		>20001031>>>>>>>(84.b+120)	string		<20010225	(beta3-4)>>>>>>(84.b+120)	string		20010225	(1.0 beta 4)>>>>>>(84.b+120)	string		>20010225>>>>>>>(84.b+120)	string		<20010615	(beta4-RC1)>>>>>>(84.b+120)	string		20010615	(1.0 RC1)>>>>>>(84.b+120)	string		20010813	(1.0 RC2)>>>>>>(84.b+120)	string		20010816	(RC2 - Garf tuned v1)>>>>>>(84.b+120)	string		20011014	(RC2 - Garf tuned v2)>>>>>>(84.b+120)	string		20011217	(1.0 RC3)>>>>>>(84.b+120)	string		20011231	(1.0 RC3)# Some pre-1.0 CVS snapshots still had "Xiphphorus"...>>>>>>(84.b+120)	string		>20011231	(pre-1.0 CVS)# For the 1.0 release, Xiphophorus is replaced by Xiph.Org>>>>(84.b+96)		string/c	Xiph.Org\ libVorbis\ I	\b, created by: Xiph.Org libVorbis I>>>>>(84.b+117)		string		>00000000	>>>>>>(84.b+117)	string		<20020717	(pre-1.0 CVS)>>>>>>(84.b+117)	string		20020717	(1.0)>>>>>>(84.b+117)	string		20030909	(1.0.1)>>>>>>(84.b+117)	string		20040629	(1.1.0 RC1)