IFF
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- Extensions: 8svx, 16sv, ilbm, anim
- MIME Types:
- 8svx: audio/8svx, audio/x-8svx
- 16sv: audio/16sv, audio/x-16sv
- ilbm: image/ilbm, image/x-ilbm
- anim: video/anim, video/x-anim
IFF (Interchange File Format) is a format developed by electronic arts in the 80's. It is the predominant format on the Amiga computer. It is a chunked format. It can be used to store any type of data, but it is predominantly used to store images, animations and audio.
IFF chunks are always padded to an even number of bytes.
Implementations
- xine has a demuxer/decoder for iff. Manfred Tremmel the author of the xine code has agreed to relicence his xine code as LGPL to allow easier use in ffmpeg. Thanks Manfred.
- Werner Randelshofer the author of multishow has also granted permission for his iff code to be relicenced as LGPL. Thanks Werner.
- Xanim also contains code to support iff, it may contain some formats not available in xine.
- libiffanim supports lots of animation formats http://www-user.tu-chemnitz.de/~womar/projects/iffanim/
- Virtualdub contains a demuxer/decoder also, look in the file InputFileANIM.cpp
ILBM FOURCC
Images are stored in planes. So, to get a pixels color value you need to combine the bits from each frame to create a color register index.
/* ---------- BitMapHeader ---------------------------------------------*/
/* Required Bitmap header (BMHD) structure describes an ILBM */
typedef struct {
uint16_t w; /* raster width in pixels */
uint16_t h; /* raster height in pixels */
int16_t x; /* x offset in pixels */
int16_t y; /* y offset in pixels */
uint8_t nplanes; /* # source bitplanes */
uint8_t masking; /* masking technique */
uint8_t compression; /* compression algoithm */
uint8_t pad1; /* UNUSED. For consistency, put 0 here. */
uint16_t transparentColor; /* transparent "color number" */
uint8_t xaspect; /* aspect ratio, a rational number x/y */
uint8_t yaspect; /* aspect ratio, a rational number x/y */
int16_t pagewidth; /* source "page" size in pixels */
int16_t pageheight; /* source "page" size in pixels */
} BitMapHeader;
List Of Chunk FOURCCs
Note: an underscore (_) is used to indicate the space character.
| EA IFF 85 Group Identifiers | |
|---|---|
| CAT_ | |
| END_ | unofficial END-of-FORM identifier (see Amiga RKM Devices Ed. 3 page 376) |
| FORM | |
| LIST | |
| PROP | |
| Text, annotations, et cetera | |
| (c)_ | EA IFF 85 Generic Copyright |
| ANNO | EA IFF 85 Generic Annotation |
| AUTH | EA IFF 85 Generic Author |
| CHRS | EA IFF 85 Generic Character String |
| FVER | Amiga OS Version String |
| JUNK | Ignore |
| NAME | EA IFF 85 Generic Title of image, music, ... |
| TEXT | EA IFF 85 Generic Unformatted ASCII Text |
| Images | |
| ILBM | EA IFF 85 Raster Bitmap Form |
| DEEP | Chunky Pixel Image Files (TV Paint) |
| RGB8 | RGB Image, Turbo Silver (Impulse) |
| RGBN | RGB Image, Turbo Silver (Impulse) |
| PBM_ | 256-Color Chunky Pixel |
| ACBM | Amiga Contiguous Bitmap (AmigaBasic) |
| Rest... | |
| 16SV | |
| 8SVX | |
| ANFI | |
| ANHD | ANIM Frame |
| ANIM | |
| ANSQ | |
| ATAK | |
| BMHD | |
| BODY | |
| CAMG | |
| CCRT | Graphicraft cycling chunk |
| CHAN | |
| CMAP | Color Map is a packed array of ColorRegisters |
| CRNG | |
| DEST | |
| DLTA | |
| DPAN | Deluxe Paint Anim Chunk |
| DPI_ | |
| DPPS | |
| DPPV | |
| DRNG | |
| FACE | |
| FADE | |
| GRAB | |
| INS1 | |
| IMRT | |
| MHDR | |
| PAN_ | |
| RLSE | |
| SAMP | |
| SEQN | |
| SHDR | |
| SMUS | |
| SPRT | |
| TINY | |
| TRAK | |
| VHDR | |