vscale.h

ESS3890+SL原代码（1*16内存）

/* Copyright 1996, ESS Technology, Inc.					*/
/* SCCSID @(#)vscale.h	4.2 05/22/03 */

/*
 * $Log$
 */

#ifdef VSCALE
#ifndef _VSCALE_H_
#define _VSCALE_H_

#ifdef GSCALE

#define NUM_MODES    5
#define VSCL_OFF     0      /* No vertical scaling */
#define VSCL_N2P     1      /* NTSC->PAL, 16->20 */
#define VSCL_LB      2      /* Letterbox, 16->12 */
#define VSCL_P2N     3      /* PAL->NTSC, 16->12 */
#define VSCL_P2N_VCD 4      /* PAL ->NTSC, 16->13, for VCD*/
#define VSCL_GENERIC 5      /* Generic polyphase scaling factor */

/*======================================================================*/
/*  Data structure for scaling assignment                               */
/*======================================================================*/
typedef struct {
    unsigned char vsize;         /* scaled vertical size of a macroblock */
    unsigned char ucode[2];      /* VP ucode to load */
    void (*functn)();            /* ptr to I/P scaling function */
} VscaleInfo_t;

#endif GSCALE

/*************************************************************************
 * 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 */

#ifdef LESS_DISP_MEM
#define P2P_DIFF	6
#else
#define P2P_DIFF	0
#endif /* LESS_DISP_MEM */
extern int e0pal2pal;		/* LESS_DISP_MEM */

/*************************************************************************
 * 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 */