2023-08-06 16:12:15 +00:00
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#------------------------------------------------------------------------------
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2023-08-08 11:16:24 +00:00
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# $File: modem,v 1.11 2022/10/19 20:15:16 christos Exp $
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2023-08-06 16:12:15 +00:00
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# modem: file(1) magic for modem programs
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#
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# From: Florian La Roche <florian@knorke.saar.de>
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1 string PC\ Research,\ Inc Digifax-G3-File
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>29 byte 1 \b, fine resolution
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>29 byte 0 \b, normal resolution
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# Summary: CCITT Group 3 Facsimile in "raw" form (i.e. no header).
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# Modified by: Joerg Jenderek
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# URL: https://de.wikipedia.org/wiki/Fax
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2023-08-08 11:16:24 +00:00
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# http://fileformats.archiveteam.org/wiki/CCITT_Group_3
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2023-08-06 16:12:15 +00:00
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# Reference: https://web.archive.org/web/20020628195336/http://www.netnam.vn/unescocourse/computervision/104.htm
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# GRR: EOL of G3 is too general as it catches also TrueType fonts, Postscript PrinterFontMetric, others
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0 short 0x0100
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# 16 0-bits near beginning like True Type fonts *.ttf, Postscript PrinterFontMetric *.pfm, FTYPE.HYPERCARD, XFER
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>2 search/9 \0\0
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# maximal 7 0-bits for pixel sequences or 11 0-bits for EOL in G3
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>2 default x
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# skip IRCAM file (VAX big-endian) ./audio
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>>0 belong !0x0001a364
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# skip GEM Image data ./images
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>>>2 beshort !0x0008
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# look for first keyword of Panorama database *.pan
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>>>>11 search/262 \x06DESIGN
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# skip Panorama database
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>>>>11 default x
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# old Apple DreamWorld DreamGrafix *.3200 with keyword at end of g3 looking files
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>>>>>27118 search/1864 DreamWorld
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>>>>>27118 default x
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# skip MouseTrap/Mt.Defaults with file size 16 found on Golden Orchard Apple II CD Rom
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>>>>>>8 ubequad !0x2e01010454010203
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# skip PICTUREH.SML found on Golden Orchard Apple II CD Rom
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2023-08-08 11:16:24 +00:00
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>>>>>>>8 ubequad !0x5dee74ad1aa56394
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# skip few (5/41) DEGAS mid-res bitmap (GEMINI01.PI2 GEMINI02.PI2 GEMINI03.PI2 CODE_RAM.PI2 TBX_DEMO.PI2)
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# with file size 32034
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>>>>>>>>-0 offset !32034 raw G3 (Group 3) FAX, byte-padded
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2023-08-06 16:12:15 +00:00
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# version 5.25 labeled the entry above "raw G3 data, byte-padded"
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!:mime image/g3fax
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#!:apple ????TIFF
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!:ext g3
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# unusual image starting with black pixel
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#0 short 0x1300 raw G3 (Group 3) FAX
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0 short 0x1400
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# 16 0-bits near beginning like PicturePuzzler found on Golden Orchard Apple CD Rom
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>2 search/9 \0\0
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# maximal 7 0-bits for pixel sequences or 11 0-bits for EOL in G3
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2023-08-08 11:16:24 +00:00
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>2 default x
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# skip some (84/1246) MacBinary II/III (Cyberdog2.068k.smi.bin FileMakerPro4.img.bin Hypercard1.25.image.bin UsbStorage1.3.5.smi.bin) with "non random" numbers by versions values 81h/82h + 81h
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>>122 ubeshort&0xFcFf !0x8081 raw G3 (Group 3) FAX
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2023-08-06 16:12:15 +00:00
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# version 5.25 labeled the above entry as "raw G3 data"
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!:mime image/g3fax
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!:ext g3
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# unusual image with black pixel near beginning
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#0 short 0x1900 raw G3 (Group 3) FAX
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#
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# Magic data for vgetty voice formats
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# (Martin Seine & Marc Eberhard)
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#
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# raw modem data version 1
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#
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0 string RMD1 raw modem data
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>4 string >\0 (%s /
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>20 short >0 compression type %#04x)
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#
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# portable voice format 1
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#
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0 string PVF1\n portable voice format
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>5 string >\0 (binary %s)
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#
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# portable voice format 2
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#
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0 string PVF2\n portable voice format
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>5 string >\0 (ascii %s)
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# From: Bernd Nuernberger <bernd.nuernberger@web.de>
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# Brooktrout G3 fax data incl. 128 byte header
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# Common suffixes: 3??, BRK, BRT, BTR
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0 leshort 0x01bb
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>2 leshort 0x0100 Brooktrout 301 fax image,
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>>9 leshort x %d x
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>>0x2d leshort x %d
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>>6 leshort 200 \b, fine resolution
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>>6 leshort 100 \b, normal resolution
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>>11 byte 1 \b, G3 compression
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>>11 byte 2 \b, G32D compression
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