253 lines
8.2 KiB
Plaintext
253 lines
8.2 KiB
Plaintext
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#------------------------------------------------------------------------------
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# $File: jpeg,v 1.38 2022/12/02 17:42:04 christos Exp $
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# JPEG images
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# SunOS 5.5.1 had
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#
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# 0 string \377\330\377\340 JPEG file
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# 0 string \377\330\377\356 JPG file
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#
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# both of which turn into "JPEG image data" here.
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#
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0 belong 0xffd8fff7 JPEG-LS image data
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!:mime image/jls
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!:ext jls
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>0 use jpeg
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0 belong&0xffffff00 0xffd8ff00 JPEG image data
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!:mime image/jpeg
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!:apple 8BIMJPEG
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!:strength *3
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!:ext jpeg/jpg/jpe/jfif
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>0 use jpeg
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0 name jpeg
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>6 string JFIF \b, JFIF standard
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# The following added by Erik Rossen <rossen@freesurf.ch> 1999-09-06
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# in a vain attempt to add image size reporting for JFIF. Note that these
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# tests are not fool-proof since some perfectly valid JPEGs are currently
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# impossible to specify in magic(4) format.
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# First, a little JFIF version info:
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>>11 byte x \b %d.
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>>12 byte x \b%02d
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# Next, the resolution or aspect ratio of the image:
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>>13 byte 0 \b, aspect ratio
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>>13 byte 1 \b, resolution (DPI)
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>>13 byte 2 \b, resolution (DPCM)
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>>14 beshort x \b, density %dx
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>>16 beshort x \b%d
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>>4 beshort x \b, segment length %d
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# Next, show thumbnail info, if it exists:
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>>18 byte !0 \b, thumbnail %dx
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>>>19 byte x \b%d
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>6 string Exif \b, Exif standard: [
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>>12 indirect/r x
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>>12 string x \b]
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# Jump to the first segment
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>(4.S+4) use jpeg_segment
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# This uses recursion...
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0 name jpeg_segment
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>0 beshort 0xFFFE
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# Recursion handled by FFE0
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#>>(2.S+2) use jpeg_segment
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>>2 pstring/HJ x \b, comment: "%s"
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>0 beshort 0xFFC0
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>>(2.S+2) use jpeg_segment
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>>4 byte x \b, baseline, precision %d
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>>7 beshort x \b, %dx
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>>5 beshort x \b%d
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>>9 byte x \b, components %d
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>0 beshort 0xFFC1
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>>(2.S+2) use jpeg_segment
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>>4 byte x \b, extended sequential, precision %d
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>>7 beshort x \b, %dx
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>>5 beshort x \b%d
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>>9 byte x \b, components %d
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>0 beshort 0xFFC2
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>>(2.S+2) use jpeg_segment
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>>4 byte x \b, progressive, precision %d
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>>7 beshort x \b, %dx
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>>5 beshort x \b%d
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>>9 byte x \b, components %d
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# Define Huffman Tables
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>0 beshort 0xFFC4
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>>(2.S+2) use jpeg_segment
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>0 beshort 0xFFE1
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# Recursion handled by FFE0
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#>>(2.S+2) use jpeg_segment
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>>4 string Exif \b, Exif Standard: [
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>>>10 indirect/r x
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>>>10 string x \b]
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# Application specific markers
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>0 beshort&0xFFE0 =0xFFE0
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>>(2.S+2) use jpeg_segment
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# DB: Define Quantization tables
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# DD: Define Restart interval [XXX: wrong here, it is 4 bytes]
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# D8: Start of image
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# D9: End of image
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# Dn: Restart
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>0 beshort&0xFFD0 =0xFFD0
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>>0 beshort&0xFFE0 !0xFFE0
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>>>(2.S+2) use jpeg_segment
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#>0 beshort x unknown %#x
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#>>(2.S+2) use jpeg_segment
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# HSI is Handmade Software's proprietary JPEG encoding scheme
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# Update: Joerg Jenderek
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# URL: http://fileformats.archiveteam.org/wiki/HSI_JPEG
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# Reference: http://mark0.net/download/triddefs_xml.7z/defs/b/bitmap-hsi1.trid.xml
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# Note: called by TrID "HSI JPEG bitmap"
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0 string hsi1 JPEG image data, HSI proprietary
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#!:mime application/octet-stream
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!:mime image/x-hsi
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!:ext hsi/jpg
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# From: David Santinoli <david@santinoli.com>
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0 string \x00\x00\x00\x0C\x6A\x50\x20\x20\x0D\x0A\x87\x0A JPEG 2000
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# delete from ./animation (version 1.87) with jP (=6A50h) magic at offset 4
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# From: Johan van der Knijff <johan.vanderknijff@kb.nl>
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# Added sub-entries for JP2, JPX, JPM and MJ2 formats; added mimetypes
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# https://github.com/bitsgalore/jp2kMagic
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#
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# Now read value of 'Brand' field, which yields a few possibilities:
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# Update: Joerg Jenderek
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# URL: http://fileformats.archiveteam.org/wiki/JP2
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# Reference: http://mark0.net/download/triddefs_xml.7z/defs/b/bitmap-jpeg2k.trid.xml
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# Note: called by TrID "JPEG 2000 bitmap"
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>20 string \x6a\x70\x32\x20 Part 1 (JP2)
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# aliases image/jpeg2000, image/jpeg2000-image, image/x-jpeg2000-image
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!:mime image/jp2
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!:ext jp2
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# URL: http://fileformats.archiveteam.org/wiki/JPX
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# Reference: http://mark0.net/download/triddefs_xml.7z/defs/b/bitmap-jpx.trid.xml
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# Note: called by TrID "JPEG 2000 eXtended bitmap"
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>20 string \x6a\x70\x78\x20 Part 2 (JPX)
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!:mime image/jpx
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!:ext jpf/jpx
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# URL: http://fileformats.archiveteam.org/wiki/JPM
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# Reference: http://mark0.net/download/triddefs_xml.7z/defs/b/bitmap-jpm.trid.xml
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# Note: called by TrID "JPEG 2000 eXtended bitmap"
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>20 string \x6a\x70\x6d\x20 Part 6 (JPM)
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!:mime image/jpm
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!:ext jpm
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# URL: http://fileformats.archiveteam.org/wiki/MJ2
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# Reference: http://mark0.net/download/triddefs_xml.7z/defs/v/video-mj2.trid.xml
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# Note: called by TrID "Motion JPEG 2000 video"
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>20 string \x6d\x6a\x70\x32 Part 3 (MJ2)
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!:mime video/mj2
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!:ext mj2/mjp2
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# Type: JPEG 2000 codesream
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# From: Mathieu Malaterre <mathieu.malaterre@gmail.com>
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# Update: Joerg Jenderek
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# URL: http://fileformats.archiveteam.org/wiki/JPEG_2000_codestream
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# Reference: http://mark0.net/download/triddefs_xml.7z/defs/b/bitmap-jpc.trid.xml
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# Note: called by TrID "JPEG-2000 Code Stream bitmap"
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0 belong 0xff4fff51 JPEG 2000 codestream
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# value like: 0701h FF50h
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#>45 ubeshort x \b, at 45 %#4.4x
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#!:mime application/octet-stream
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# https://reposcope.com/mimetype/image/x-jp2-codestream
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!:mime image/x-jp2-codestream
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!:ext jpc/j2c/j2k
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# MAYBE also JHC like in byte_causal.jhc ?
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# WHAT IS THAT? DEAD ENTRY?
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#45 beshort 0xff52
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# JPEG extended range
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# URL: http://fileformats.archiveteam.org/wiki/JPEG_XR
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# Reference: https://www.itu.int/rec/T-REC-T.832
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# http://mark0.net/download/triddefs_xml.7z/defs/b/bitmap-wmp.trid.xml
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# Note: called by TrID "JPEG XR bitmap"
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0 string \x49\x49\xbc
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# FILE_VERSION_ID; shall be equal to 1; other values are reserved for future use
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>3 byte 1
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# FIRST_IFD_OFFSET; shall be an integer multiple of 2; so skip DROID fmt-590-signature-id-931.wdp
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>>4 lelong%2 0 JPEG-XR
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#!:mime image/vnd.ms-photo
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!:mime image/jxr
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# NO example for HDP !
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!:ext jxr/wdp/hdp
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# MAYBE also WMP ?
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#!:ext jxr/wdp/hdp/wmp
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# moved from ./images (version 1.205 ), merged and
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# partly verified by XnView `nconvert -info abydos.jxr FLOWER.wdp`
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# example: https://web.archive.org/web/20160403012904/
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# http://shikino.co.jp/solution/upfile/FLOWER.wdp.zip
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>90 bequad 0x574D50484F544F00
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>>98 byte&0x08 =0x08 \b, hard tiling
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>>99 byte&0x80 =0x80 \b, tiling present
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>>99 byte&0x40 =0x40 \b, codestream present
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>>99 byte&0x38 x \b, spatial xform=
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>>99 byte&0x38 0x00 \bTL
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>>99 byte&0x38 0x08 \bBL
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>>99 byte&0x38 0x10 \bTR
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>>99 byte&0x38 0x18 \bBR
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>>99 byte&0x38 0x20 \bBT
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>>99 byte&0x38 0x28 \bRB
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>>99 byte&0x38 0x30 \bLT
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>>99 byte&0x38 0x38 \bLB
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>>100 byte&0x80 =0x80 \b, short header
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>>>102 beshort+1 x \b, %d
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>>>104 beshort+1 x \bx%d
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>>100 byte&0x80 =0x00 \b, long header
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>>>102 belong+1 x \b, %x
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>>>106 belong+1 x \bx%x
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>>101 beshort&0xf x \b, bitdepth=
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>>>101 beshort&0xf 0x0 \b1-WHITE=1
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>>>101 beshort&0xf 0x1 \b8
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>>>101 beshort&0xf 0x2 \b16
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>>>101 beshort&0xf 0x3 \b16-SIGNED
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>>>101 beshort&0xf 0x4 \b16-FLOAT
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>>>101 beshort&0xf 0x5 \b(reserved 5)
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>>>101 beshort&0xf 0x6 \b32-SIGNED
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>>>101 beshort&0xf 0x7 \b32-FLOAT
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>>>101 beshort&0xf 0x8 \b5
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>>>101 beshort&0xf 0x9 \b10
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>>>101 beshort&0xf 0xa \b5-6-5
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>>>101 beshort&0xf 0xb \b(reserved %d)
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>>>101 beshort&0xf 0xc \b(reserved %d)
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>>>101 beshort&0xf 0xd \b(reserved %d)
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>>>101 beshort&0xf 0xe \b(reserved %d)
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>>>101 beshort&0xf 0xf \b1-BLACK=1
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>>101 beshort&0xf0 x \b, colorfmt=
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>>>101 beshort&0xf0 0x00 \bYONLY
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>>>101 beshort&0xf0 0x10 \bYUV240
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>>>101 beshort&0xf0 0x20 \bYWV422
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>>>101 beshort&0xf0 0x30 \bYWV444
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>>>101 beshort&0xf0 0x40 \bCMYK
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>>>101 beshort&0xf0 0x50 \bCMYKDIRECT
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>>>101 beshort&0xf0 0x60 \bNCOMPONENT
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>>>101 beshort&0xf0 0x70 \bRGB
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>>>101 beshort&0xf0 0x80 \bRGBE
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>>>101 beshort&0xf0 >0x80 \b(reserved %#x)
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# JPEG XL
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# From: Ian Tester
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# Update: Joerg Jenderek
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# URL: http://fileformats.archiveteam.org/wiki/JPEG_XL
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# Reference: http://mark0.net/download/triddefs_xml.7z/defs/b/bitmap-jxl.trid.xml
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# Note: called by TrID "JPEG XL bitmap"
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0 string \xff\x0a JPEG XL codestream
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!:mime image/jxl
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!:ext jxl
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# JPEG XL (transcoded JPEG file)
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# Update: Joerg Jenderek
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# URL: http://fileformats.archiveteam.org/wiki/JPEG_XL
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# Reference: http://mark0.net/download/triddefs_xml.7z/defs/b/bitmap-jxl-iso.trid.xml
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# Note: called by TrID "JPEG XL bitmap (ISOBMFF)"
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0 string \x00\x00\x00\x0cJXL\x20\x0d\x0a\x87\x0a JPEG XL container
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!:mime image/jxl
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!:ext jxl
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