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