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