# $File: jpeg,v 1.38 2022/12/02 17:42:04 christos Exp $

#------------------------------------------------------------------------------
# $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 <[email protected]> 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 <[email protected]>
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 <[email protected]>
# 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 <[email protected]>
# 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