vscale.h

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/* Copyright 1996, ESS Technology, Inc.					*/
/* SCCSID @(#)vscale.h	1.11 3/10/98 */

/*
 * $Log$
 */

#ifdef VSCALE
#ifndef _VSCALE_H_
#define _VSCALE_H_

/*************************************************************************
 * Data structure for scaling assignment                                 *
 *************************************************************************/
typedef struct {
    unsigned char ratio;   /* ratio of frame to screen height */
    unsigned char vsize;   /* scaled vertical size of a macroblock */
    unsigned char ucode;	 /* VP ucode to run */
    unsigned char dummy;
} VSCALE_Info;

/*************************************************************************
 * global variables defined in vscale.c 				 *
 *************************************************************************/
extern int VscaleReady;		/* ready to scale */
extern int VscaleStart;		/* start to scale */
extern int VscaleLineOutY;	/* where to find output */
extern int VscaleLineInY; 	/* where to find input */
extern int VscaleDeltaOut;	/* vertical size of macroblock after scaling */
extern int VscaleLastFrame;	/* force last frame scaling when we see 0xb7 */
extern int H_VscaleFrame; 	/* input only, not changed inside vscale */

/*************************************************************************
 * global function prototype 						 *
 *************************************************************************/
void vscale2(void);
void resetVscale(void);
void initVscale(int);
void initVscale_Pointer(void);
void load_scaling_ucode(int);
#ifdef PLAY20
int  rescale_still(void);
#endif	/* PLAY20 */ 
#endif	/* _VSCALE_H_ */
#endif	/* VSCALE */