120 lines
3.0 KiB
C
120 lines
3.0 KiB
C
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/* ----------------------------- MNI Header -----------------------------------
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@NAME : mpeg.h
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@INPUT :
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@OUTPUT :
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@RETURNS :
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@DESCRIPTION: Types and function prototypes needed for applications to
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use the Berkely MPEG decoding engine via the MNI front
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end.
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@METHOD :
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@GLOBALS : Types defined:
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ImageDesc - structure giving height, width, etc.
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DitherEnum - the different dither types supported by
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the decoding engine
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@CALLS :
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@CREATED : Greg Ward, 94/6/16.
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@MODIFIED : Greg Ward, 94/9/12 (based on John Cristy's fixes): made
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more amenable to use with other libraries that also
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happen to define TRUE, FALSE, [Bb]oolean, and added
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PROTO macro
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---------------------------------------------------------------------------- */
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#ifndef __MPEG_H
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#define __MPEG_H
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#include <stdio.h>
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/* An attempt at a portable and integrable boolean type... */
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#if (!defined(TRUE) || !defined(FALSE))
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# define TRUE 1
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# define FALSE 0
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#endif
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#if (!defined (BOOLEAN_TYPE_EXISTS))
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typedef unsigned int Boolean;
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#endif
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typedef struct
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{
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short red, green, blue;
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} ColormapEntry;
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typedef struct
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{
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int Height; /* in pixels */
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int Width;
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int Depth; /* image depth (bits) */
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int PixelSize; /* bits actually stored per pixel */
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int Size; /* bytes for whole image */
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int BitmapPad; /* "quantum" of a scanline -- each scanline */
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/* starts on an even interval of this */
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/* many bits */
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int PictureRate; /* required number of frames/sec [?] */
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int BitRate; /* ??? */
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int ColormapSize;
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ColormapEntry *Colormap; /* an array of ColormapSize entries */
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} ImageDesc;
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typedef enum
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{
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HYBRID_DITHER,
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HYBRID2_DITHER,
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FS4_DITHER,
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FS2_DITHER,
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FS2FAST_DITHER,
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Twox2_DITHER,
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GRAY_DITHER,
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FULL_COLOR_DITHER,
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NO_DITHER,
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ORDERED_DITHER,
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MONO_DITHER,
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MONO_THRESHOLD,
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ORDERED2_DITHER,
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MBORDERED_DITHER
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} DitherEnum;
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typedef enum
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{
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MPEG_DITHER,
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MPEG_QUIET,
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MPEG_LUM_RANGE,
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MPEG_CR_RANGE,
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MPEG_CB_RANGE,
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MPEG_CMAP_INDEX
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} MPEGOptionEnum;
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Kludge so we can compile under ANSI or K&R. (This only means
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* that programs that *use* mpeg_lib can be compiled with K&R;
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* the library itself must be compiled with an ANSI compiler.
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* Mixing and matching compilers, BTW, is not a good idea...)
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*/
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#undef PROTO
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#if __STDC__ || __cplusplus
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#define PROTO(formal_parameters) formal_parameters
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#else
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#define const
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#define PROTO(formal_parameters) ()
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#endif
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/* Function prototypes (all are defined in wrapper.c) */
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Boolean OpenMPEG PROTO((FILE *MPEGfile, ImageDesc *ImgInfo));
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void CloseMPEG PROTO((void));
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Boolean RewindMPEG PROTO((FILE *MPEGfile, ImageDesc *Image));
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void SetMPEGOption PROTO((MPEGOptionEnum Option, int value));
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Boolean GetMPEGFrame PROTO((char *Frame));
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#ifdef __cplusplus
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}
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#endif
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#endif /* __MPEG_H */
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