file/magic/Magdir/jpeg

#------------------------------------------------------------------------------
# $File: jpeg,v 1.38 2022/12/02 17:42:04 christos Exp $
# JPEG images
# SunOS 5.5.1 had
#
#	0	string		\377\330\377\340	JPEG file
#	0	string		\377\330\377\356	JPG file
#
# both of which turn into "JPEG image data" here.
#
0	belong			0xffd8fff7	JPEG-LS image data
!:mime	image/jls
!:ext jls
>0	use			jpeg

0	belong&0xffffff00	0xffd8ff00	JPEG image data
!:mime	image/jpeg
!:apple	8BIMJPEG
!:strength *3
!:ext jpeg/jpg/jpe/jfif
>0	use			jpeg

0	name		jpeg
>6	string		JFIF		\b, JFIF standard
# The following added by Erik Rossen <rossen@freesurf.ch> 1999-09-06
# in a vain attempt to add image size reporting for JFIF.  Note that these
# tests are not fool-proof since some perfectly valid JPEGs are currently
# impossible to specify in magic(4) format.
# First, a little JFIF version info:
>>11	byte		x		\b %d.
>>12	byte		x		\b%02d
# Next, the resolution or aspect ratio of the image:
>>13	byte		0		\b, aspect ratio
>>13	byte		1		\b, resolution (DPI)
>>13	byte		2		\b, resolution (DPCM)
>>14	beshort		x		\b, density %dx
>>16	beshort		x		\b%d
>>4	beshort		x		\b, segment length %d
# Next, show thumbnail info, if it exists:
>>18	byte		!0		\b, thumbnail %dx
>>>19	byte		x		\b%d
>6	string		Exif		\b, Exif standard: [
>>12	indirect/r	x
>>12	string		x		\b]

# Jump to the first segment
>(4.S+4)	use		jpeg_segment

# This uses recursion...
0		name		jpeg_segment
>0	beshort		0xFFFE
# Recursion handled by FFE0
#>>(2.S+2)	use			jpeg_segment
>>2	pstring/HJ	x		\b, comment: "%s"

>0	beshort		0xFFC0
>>(2.S+2)	use			jpeg_segment
>>4	byte		x		\b, baseline, precision %d
>>7	beshort		x		\b, %dx
>>5	beshort		x		\b%d
>>9	byte		x		\b, components %d

>0	beshort		0xFFC1
>>(2.S+2)	use			jpeg_segment
>>4	byte		x		\b, extended sequential, precision %d
>>7	beshort		x		\b, %dx
>>5	beshort		x		\b%d
>>9	byte		x		\b, components %d

>0	beshort		0xFFC2
>>(2.S+2)	use			jpeg_segment
>>4	byte		x		\b, progressive, precision %d
>>7	beshort		x		\b, %dx
>>5	beshort		x		\b%d
>>9	byte		x		\b, components %d

# Define Huffman Tables
>0	beshort		0xFFC4
>>(2.S+2)	use			jpeg_segment

>0	beshort		0xFFE1
# Recursion handled by FFE0
#>>(2.S+2)	use			jpeg_segment
>>4	string		Exif		\b, Exif Standard: [
>>>10	indirect/r	x
>>>10	string		x		\b]

# Application specific markers
>0	beshort&0xFFE0	=0xFFE0
>>(2.S+2)	use			jpeg_segment

# DB: Define Quantization tables
# DD: Define Restart interval [XXX: wrong here, it is 4 bytes]
# D8: Start of image
# D9: End of image
# Dn: Restart
>0	beshort&0xFFD0	=0xFFD0
>>0	beshort&0xFFE0	!0xFFE0
>>>(2.S+2)	use			jpeg_segment

#>0	beshort		x		unknown %#x
#>>(2.S+2)	use			jpeg_segment

# HSI is Handmade Software's proprietary JPEG encoding scheme
# Update:	Joerg Jenderek
# URL:		http://fileformats.archiveteam.org/wiki/HSI_JPEG
# Reference:	http://mark0.net/download/triddefs_xml.7z/defs/b/bitmap-hsi1.trid.xml
# Note:         called by TrID "HSI JPEG bitmap"
0	string		hsi1		JPEG image data, HSI proprietary
#!:mime	application/octet-stream
!:mime	image/x-hsi
!:ext	hsi/jpg

# From: David Santinoli <david@santinoli.com>
0	string		\x00\x00\x00\x0C\x6A\x50\x20\x20\x0D\x0A\x87\x0A	JPEG 2000
# delete from ./animation (version 1.87) with jP (=6A50h) magic at offset 4
# From: Johan van der Knijff <johan.vanderknijff@kb.nl>
# Added sub-entries for JP2, JPX, JPM and MJ2 formats; added mimetypes
# https://github.com/bitsgalore/jp2kMagic
#
# Now read value of 'Brand' field, which yields a few possibilities:
# Update:	Joerg Jenderek
# URL:		http://fileformats.archiveteam.org/wiki/JP2
# Reference:	http://mark0.net/download/triddefs_xml.7z/defs/b/bitmap-jpeg2k.trid.xml
# Note:         called by TrID "JPEG 2000 bitmap"
>20	string		\x6a\x70\x32\x20	Part 1 (JP2)
# aliases	image/jpeg2000, image/jpeg2000-image, image/x-jpeg2000-image
!:mime	image/jp2
!:ext	jp2
# URL:		http://fileformats.archiveteam.org/wiki/JPX
# Reference:	http://mark0.net/download/triddefs_xml.7z/defs/b/bitmap-jpx.trid.xml
# Note:         called by TrID "JPEG 2000 eXtended bitmap"
>20	string		\x6a\x70\x78\x20	Part 2 (JPX)
!:mime	image/jpx
!:ext	jpf/jpx
# URL:		http://fileformats.archiveteam.org/wiki/JPM
# Reference:	http://mark0.net/download/triddefs_xml.7z/defs/b/bitmap-jpm.trid.xml
# Note:         called by TrID "JPEG 2000 eXtended bitmap"
>20	string		\x6a\x70\x6d\x20	Part 6 (JPM)
!:mime	image/jpm
!:ext	jpm
# URL:		http://fileformats.archiveteam.org/wiki/MJ2
# Reference:	http://mark0.net/download/triddefs_xml.7z/defs/v/video-mj2.trid.xml
# Note:         called by TrID "Motion JPEG 2000 video"
>20	string		\x6d\x6a\x70\x32	Part 3 (MJ2)
!:mime	video/mj2
!:ext	mj2/mjp2

# Type: JPEG 2000 codesream
# From: Mathieu Malaterre <mathieu.malaterre@gmail.com>
# Update:	Joerg Jenderek
# URL:		http://fileformats.archiveteam.org/wiki/JPEG_2000_codestream
# Reference:	http://mark0.net/download/triddefs_xml.7z/defs/b/bitmap-jpc.trid.xml
# Note:         called by TrID "JPEG-2000 Code Stream bitmap"
0	belong		0xff4fff51						JPEG 2000 codestream
# value like: 0701h FF50h
#>45	ubeshort	x	\b, at 45 %#4.4x
#!:mime	application/octet-stream
# https://reposcope.com/mimetype/image/x-jp2-codestream
!:mime	image/x-jp2-codestream
!:ext	jpc/j2c/j2k
# MAYBE also JHC like in byte_causal.jhc ?
# WHAT IS THAT? DEAD ENTRY?
#45	beshort		0xff52

# JPEG extended range
# URL:		http://fileformats.archiveteam.org/wiki/JPEG_XR
# Reference:	https://www.itu.int/rec/T-REC-T.832
#		http://mark0.net/download/triddefs_xml.7z/defs/b/bitmap-wmp.trid.xml
# Note:         called by TrID "JPEG XR bitmap"
0	string		\x49\x49\xbc
# FILE_VERSION_ID; shall be equal to 1; other values are reserved for future use
>3	byte		1
# FIRST_IFD_OFFSET; shall be an integer multiple of 2; so skip DROID fmt-590-signature-id-931.wdp
>>4	lelong%2	0	JPEG-XR
#!:mime	image/vnd.ms-photo
!:mime	image/jxr
# NO example for HDP !
!:ext	jxr/wdp/hdp
# MAYBE also WMP ?
#!:ext	jxr/wdp/hdp/wmp
# moved from ./images (version 1.205 ), merged and
# partly verified by XnView `nconvert -info abydos.jxr FLOWER.wdp`
# example: https://web.archive.org/web/20160403012904/
# http://shikino.co.jp/solution/upfile/FLOWER.wdp.zip
>90	bequad		0x574D50484F544F00
>>98	byte&0x08	=0x08			\b, hard tiling
>>99	byte&0x80	=0x80			\b, tiling present
>>99	byte&0x40	=0x40			\b, codestream present
>>99	byte&0x38	x			\b, spatial xform=
>>99	byte&0x38	0x00			\bTL
>>99	byte&0x38	0x08			\bBL
>>99	byte&0x38	0x10			\bTR
>>99	byte&0x38	0x18			\bBR
>>99	byte&0x38	0x20			\bBT
>>99	byte&0x38	0x28			\bRB
>>99	byte&0x38	0x30			\bLT
>>99	byte&0x38	0x38			\bLB
>>100	byte&0x80	=0x80			\b, short header
>>>102	beshort+1	x			\b, %d
>>>104	beshort+1	x			\bx%d
>>100	byte&0x80	=0x00			\b, long header
>>>102	belong+1	x			\b, %x
>>>106	belong+1	x			\bx%x
>>101	beshort&0xf	x			\b, bitdepth=
>>>101	beshort&0xf	0x0			\b1-WHITE=1
>>>101	beshort&0xf	0x1			\b8
>>>101	beshort&0xf	0x2			\b16
>>>101	beshort&0xf	0x3			\b16-SIGNED
>>>101	beshort&0xf	0x4			\b16-FLOAT
>>>101	beshort&0xf	0x5			\b(reserved 5)
>>>101	beshort&0xf	0x6			\b32-SIGNED
>>>101	beshort&0xf	0x7			\b32-FLOAT
>>>101	beshort&0xf	0x8			\b5
>>>101	beshort&0xf	0x9			\b10
>>>101	beshort&0xf	0xa			\b5-6-5
>>>101	beshort&0xf	0xb			\b(reserved %d)
>>>101	beshort&0xf	0xc			\b(reserved %d)
>>>101	beshort&0xf	0xd			\b(reserved %d)
>>>101	beshort&0xf	0xe			\b(reserved %d)
>>>101	beshort&0xf	0xf			\b1-BLACK=1
>>101	beshort&0xf0	x			\b, colorfmt=
>>>101	beshort&0xf0	0x00			\bYONLY
>>>101	beshort&0xf0	0x10			\bYUV240
>>>101	beshort&0xf0	0x20			\bYWV422
>>>101	beshort&0xf0	0x30			\bYWV444
>>>101	beshort&0xf0	0x40			\bCMYK
>>>101	beshort&0xf0	0x50			\bCMYKDIRECT
>>>101	beshort&0xf0	0x60			\bNCOMPONENT
>>>101	beshort&0xf0	0x70			\bRGB
>>>101	beshort&0xf0	0x80			\bRGBE
>>>101	beshort&0xf0	>0x80			\b(reserved %#x)

# JPEG XL
# From: Ian Tester
# Update:	Joerg Jenderek
# URL:		http://fileformats.archiveteam.org/wiki/JPEG_XL
# Reference:	http://mark0.net/download/triddefs_xml.7z/defs/b/bitmap-jxl.trid.xml
# Note:         called by TrID "JPEG XL bitmap"
0	string	\xff\x0a				JPEG XL codestream
!:mime	image/jxl
!:ext jxl

# JPEG XL (transcoded JPEG file)
# Update:	Joerg Jenderek
# URL:		http://fileformats.archiveteam.org/wiki/JPEG_XL
# Reference:	http://mark0.net/download/triddefs_xml.7z/defs/b/bitmap-jxl-iso.trid.xml 
# Note:         called by TrID "JPEG XL bitmap (ISOBMFF)"
0	string	\x00\x00\x00\x0cJXL\x20\x0d\x0a\x87\x0a	JPEG XL container
!:mime	image/jxl
!:ext jxl