kva/MPEG.H at master · OS2World/kva · GitHub

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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


/* An attempt at a portable and integrable boolean type... */

#if (!defined(TRUE) || !defined(FALSE))
# define TRUE 1
# define FALSE 0
#endif

typedef unsigned int Boolean;

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...)
 */

/* Function prototypes (all are defined in wrapper.c) */

Boolean _System OpenMPEG (int MPEGfile, ImageDesc *ImgInfo);
void    _System CloseMPEG (void);
Boolean _System RewindMPEG (int MPEGfile, ImageDesc *Image);
Boolean _System GetMPEGFrame (char *Frame, int Pitch);

#ifdef __cplusplus
}
#endif

#endif   /* __MPEG_H */