file/magdir/iff

   1
   2 #------------------------------------------------------------------------------
   3 # iff:  file(1) magic for Interchange File Format (see also "audio" & "images")
   4 #
   5 # Daniel Quinlan (quinlan@yggdrasil.com) -- IFF was designed by Electronic
   6 # Arts for file interchange.  It has also been used by Apple, SGI, and
   7 # especially Commodore-Amiga.
   8 #
   9 # IFF files begin with an 8 byte FORM header, followed by a 4 character
  10 # FORM type, which is followed by the first chunk in the FORM.
  11
  12 0       string          FORM            IFF data
  13 #>4     belong          x               \b, FORM is %d bytes long
  14 # audio formats
  15 >8      string          AIFF            \b, AIFF audio
  16 >8      string          AIFC            \b, AIFF-C compressed audio
  17 >8      string          8SVX            \b, 8SVX 8-bit sampled sound voice
  18 >8      string          SAMP            \b, SAMP sampled audio
  19 # image formats
  20 >8      string          ILBMBMHD        \b, ILBM interleaved image
  21 >>20    beshort         x               \b, %d x
  22 >>22    beshort         x               %d
  23 >8      string          RGBN            \b, RGBN 12-bit RGB image
  24 >8      string          RGB8            \b, RGB8 24-bit RGB image
  25 >8      string          DR2D            \b, DR2D 2-D object
  26 >8      string          TDDD            \b, TDDD 3-D rendering
  27 # other formats
  28 >8      string          FTXT            \b, FTXT formatted text