xref: /freebsd/contrib/file/magic/Magdir/nifty (revision a4d6d3b8910f3805eebcd8703e11e066aad2e2a1)

#------------------------------------------------------------------------------
# $File: nifty,v 1.1 2022/02/14 16:51:15 christos Exp $
# file(1) magic for the NIfTI file format

# Type: NIfTI, Neuroimaging file format
# URL:  https://nifti.nimh.nih.gov/
# From: Yann Leprince <yann.leprince@cea.fr>, 2022

344	string		n+1\0		NIfTI-1 neuroimaging data,
!:mime	image/x.nifti
!:ext	nii
>0	use		nifti1
344	string		ni1\0		NIfTI-1 neuroimaging data header,
!:mime	image/x.nifti
!:ext	hdr
>0	use		nifti1

4	string		n+2\0\r\n\032\n	NIfTI-2 neuroimaging data,
!:mime	image/x.nifti
!:ext	nii
>0	use		nifti2
4	string		ni2\0\r\n\032\n	NIfTI-2 neuroimaging data header,
!:mime	image/x.nifti
!:ext	hdr
>0	use		nifti2

# Main subroutine for NIfTI-1
0	name		nifti1
>0	clear		x
>0	lelong		=348		little endian
>>70	use		nifti-datatype-le
>>112	lefloat	!0		with scaling
>>0	use		nifti1-dim-le
>>252	leshort	>0		\b, with qform
>>>252	use		xform-code-nifti1-le
>>254	leshort	>0		\b, with sform
>>>254	use		xform-code-nifti1-le
>>136	string		>\0		\b, description: %s
>0	belong		=348		big endian
>>70	use		\^nifti-datatype-le
>>112	befloat	!0		with scaling
>>0	use		\^nifti1-dim-le
>>252	beshort	>0		\b, with qform
>>>252	use		\^xform-code-nifti1-le
>>254	beshort	>0		\b, with sform
>>>254	use		\^xform-code-nifti1-le
>>136	string		>\0		\b, description: %s
>0	default	x
>>0	long		x		invalid sizeof_hdr=%d

# Main subroutine for NIfTI-2
0	name		nifti2
>0	clear		x
>0	lelong		=540		little endian
>>12	use		nifti-datatype-le
>>176	lefloat	!0		with scaling
>>0	use		nifti2-dim-le
>>344	lelong		>0		\b, with qform
>>>344	use		xform-code-nifti2-le
>>348	lelong		>0		\b, with sform
>>>348	use		xform-code-nifti2-le
>>240	string		>\0		\b, description: %s
>0	belong		=540		big endian
>>12	use		\^nifti-datatype-le
>>176	befloat	!0		with scaling
>>0	use		\^nifti2-dim-le
>>344	lelong		>0		\b, with qform
>>>344	use		\^xform-code-nifti2-le
>>348	lelong		>0		\b, with sform
>>>348	use		\^xform-code-nifti2-le
>>240	string		>\0		\b, description: %s
>0	default	x
>>0	long		x		invalid sizeof_hdr=%d


# Other subroutines for details of NIfTI files

0	name		nifti-datatype-le
>0	clear		x
>0	leshort	=1		\b, binary datatype
>0	leshort	=2		\b, uint8 datatype
>0	leshort	=4		\b, int16 datatype
>0	leshort	=8		\b, int32 datatype
>0	leshort	=16		\b, float32 datatype
>0	leshort	=32		\b, complex64 datatype
>0	leshort	=64		\b, float64 datatype
>0	leshort	=128		\b, RGB24 datatype
>0	leshort	=256		\b, int8 datatype
>0	leshort	=512		\b, uint16 datatype
>0	leshort	=768		\b, uint32 datatype
>0	leshort	=1024		\b, int64 datatype
>0	leshort	=1280		\b, uint64 datatype
>0	leshort	=1536		\b, float128 datatype
>0	leshort	=1792		\b, complex128 datatype
>0	leshort	=2048		\b, complex256 datatype
>0	leshort	=2304		\b, RGBA32 datatype
>0	default	x
>>0	leshort	x		\b, unknown datatype 0x%x
>>2	leshort	x		(%d bits/pixel)

0	name		nifti1-dim-le
>0	clear		x
>40	leshort	<0		\b, INVALID dim[0]=%d
>40	leshort	>7		\b, INVALID dim[0]=%d
>0	default	x
>>40	leshort	x		\b, %d-dimensional (size
>>42	leshort	x		%d
>>40	leshort	>1
>>>44	leshort	x		\bx%d
>>40	leshort	>2
>>>46	leshort	x		\bx%d
>>40	leshort	>3
>>>48	leshort	x		\bx%d
>>40	leshort	>4
>>>50	leshort	x		\bx%d
>>40	leshort	>5
>>>52	leshort	x		\bx%d
>>40	leshort	>6
>>>54	leshort	x		\bx%d
>>80	lefloat	x		\b, voxel size %f
>>40	leshort	>1
>>>84	lefloat	x		x %f
>>40	leshort	>2
>>>88	lefloat	x		x %f
>>123	use		nifti1-xyz-unit
>>40	leshort	>3
>>>92	lefloat	x		x %f
>>>123	use		nifti1-t-unit
>>40	leshort	x		\b)

0	name		nifti2-dim-le
>0	clear		x
>16	lequad		<0		\b, INVALID dim[0]=%lld
>16	lequad		>7		\b, INVALID dim[0]=%lld
>0	default	x
>>16	lequad		x		\b, %lld-dimensional (size
>>24	lequad		x		%lld
>>16	lequad		>1
>>>32	lequad		x		\bx%lld
>>16	lequad		>2
>>>40	lequad		x		\bx%lld
>>16	lequad		>3
>>>48	lequad		x		\bx%lld
>>16	lequad		>4
>>>56	lequad		x		\bx%lld
>>16	lequad		>5
>>>64	lequad		x		\bx%lld
>>16	lequad		>6
>>>72	lequad		x		\bx%lld,
>>112	ledouble	x		\b, voxel size %f
>>16	lequad		>1
>>>120	ledouble	x		x %f
>>16	lequad		>2
>>>128	ledouble	x		x %f
>>500	use		nifti2-xyz-unit
>>16	lequad		>3
>>>136	ledouble	x		x %f
>>>500	use		nifti2-t-unit
>>16	lequad		x		\b)

0	name		xform-code-nifti1-le
>0	leshort	=1		to scanner-based coordinates
>0	leshort	=2		to aligned coordinates
>0	leshort	=3		to Talairach coordinates
>0	leshort	=4		to MNI152 coordinates
>0	leshort	=5		to template coordinates

0	name		xform-code-nifti2-le
>0	lelong		=1		to scanner-based coordinates
>0	lelong		=2		to aligned coordinates
>0	lelong		=3		to Talairach coordinates
>0	lelong		=4		to MNI152 coordinates
>0	lelong		=5		to template coordinates

0	name		nifti1-xyz-unit
>0	byte		&0x01
>>0	byte		^0x02		m
>>0	byte		&0x02		micron
>0	byte		^0x01
>>0	byte		&0x02		mm

0	name		nifti1-t-unit
>0	byte		&0x08
>>0	byte		^0x10		s
>>0	byte		&0x10		ms
>0	byte		^0x08
>>0	byte		&0x10		microsecond

0	name		nifti2-xyz-unit
>0	lelong		&0x01
>>0	lelong		^0x02		m
>>0	lelong		&0x02		micron
>0	lelong		^0x01
>>0	lelong		&0x02		mm

0	name		nifti2-t-unit
>0	lelong		&0x08
>>0	lelong		^0x10		s
>>0	lelong		&0x10		ms
>0	lelong		^0x08
>>0	lelong		&0x10		microsecond