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Untitled edit
AFAIK CDXL is a not a subtype of the Interchange File Format (IFF). Here's the (only) CDXL format description I found so far. It' is from a file "CDXL.guide" (Does someone knows a better one by the way?). I can't see any relation and that's why I'll remove this IFF reference from the article.
CDXL-Format
BYTE 8 Bit unsigned integer
WORD 16 Bit unsigned integer, `Motorola`-Byte-Sex
LONG 32 Bit unsigned integer, `Motorola`-Byte-Sex
CDXL-Format description [CHUNK]
#01 BYTE: $00 {0} [CUSTOM CDXL]
or BYTE: $01 {1} [STANDARD CDXL]
or BYTE: $02 {2} [SPECIAL CDXL]
The CDXL-Info-Byte emerge by addition of the three description goups:
#02 BYTE: $00 {0} [RGB] ...VIDEO ENCODING
or BYTE: $01 {1} [HAM]
or BYTE: $02 {2} [YUV]
or BYTE: $03 {3} [AVM & DCTV]
plus
#02 BYTE: $00 {0} [BIT PLANAR] ...PIXEL ORIENTATION
or BYTE: $20 {32} [BYTE PLANAR]
or BYTE: $40 {64} [CHUNKY]
or BYTE: $80 {128} [BIT LINE]
or BYTE: $C0 {192} [BYTE LINE]
plus
#02 BYTE: $00 {0} [MONO] ...AUDIO VALUES
or BYTE: $10 {16} [STEREO]
#03 LONG: $0000295C {10588} [CURRENT CHUNKSIZE]
#07 LONG: $0000295C {10588} [PREVIOUS CHUNKSIZE]
#11 LONG: $00000001 {1} [CURRENT FRAMENUMBER]
#15 WORD: $00CB {203} [BITMAPWIDTH]
#17 WORD: $005E {94} [BITMAPHEIGHT]
#19 BYTE: $00 {0} [RESERVED]
#20 BYTE: $04 {4} [NUMBEROFBITPLANES]
#21 WORD: $0020 {32} [COLORMAPSIZE]
#23 WORD: $02EC {748} [RAWSOUNDSIZE]
#25 BYTE: $00 {0} [RESERVED]
#26 BYTE: $00 {0} [RESERVED]
#27 BYTE: $00 {0} [RESERVED]
#28 BYTE: $00 {0} [RESERVED]
#29 BYTE: $00 {0} [RESERVED]
#30 BYTE: $00 {0} [RESERVED]
#31 BYTE: $00 {0} [RESERVED]
#32 BYTE: $00 {0} [RESERVED]
BYTE #33 - #64 [COLORMAP] ; The pens are always WORD-coded with preceding 0s
i.e. each color entry has 12 Bit (4096 different colors).
z.B. 0FFF oder 0E9A
|||_15 |||_10 ; RGB_blue_component (0-15)
||__15 ||__09 ; RGB_green_component (0-15)
|___15 |___14 ; RGB_red_component (0-15)
All of the following data ordered:@{ub}
BITMAPDATA [UNCOMPRESSED BODY]
SOUNDDATA [UNCOMPRESSED BODY]
HEADER
COLORMAPDATA
BITMAPDATA
SOUNDDATA
etc. ordered