videotext.h

嵌入式系统设计与实例开发源码

#ifndef _VTX_H
#define _VTX_H

/* $Id: videotext.h,v 1.1 1998/03/30 22:26:39 alan Exp $
 *
 * Copyright (c) 1994-97 Martin Buck  <[e-mail]>
 * Read COPYING for more information
 *
 */


/*
 *	Videotext ioctls
 */
#define VTXIOCGETINFO  0x7101  /* get version of driver & capabilities of vtx-chipset */
#define VTXIOCCLRPAGE  0x7102  /* clear page-buffer */
#define VTXIOCCLRFOUND 0x7103  /* clear bits indicating that page was found */
#define VTXIOCPAGEREQ  0x7104  /* search for page */
#define VTXIOCGETSTAT  0x7105  /* get status of page-buffer */
#define VTXIOCGETPAGE  0x7106  /* get contents of page-buffer */
#define VTXIOCSTOPDAU  0x7107  /* stop data acquisition unit */
#define VTXIOCPUTPAGE  0x7108  /* display page on TV-screen */
#define VTXIOCSETDISP  0x7109  /* set TV-mode */
#define VTXIOCPUTSTAT  0x710a  /* set status of TV-output-buffer */
#define VTXIOCCLRCACHE 0x710b  /* clear cache on VTX-interface (if avail.) */
#define VTXIOCSETVIRT  0x710c  /* turn on virtual mode (this disables TV-display) */


/* 
 *	Definitions for VTXIOCGETINFO
 */
 
#define SAA5243 0
#define SAA5246 1
#define SAA5249 2
#define SAA5248 3
#define XSTV5346 4

typedef struct {
	int version_major, version_minor;	/* version of driver; if version_major changes, driver */
						/* is not backward compatible!!! CHECK THIS!!! */  
	int numpages;				/* number of page-buffers of vtx-chipset */
	int cct_type;				/* type of vtx-chipset (SAA5243, SAA5246, SAA5248 or
  						 * SAA5249) */
}
vtx_info_t;


/*
 *	Definitions for VTXIOC{CLRPAGE,CLRFOUND,PAGEREQ,GETSTAT,GETPAGE,STOPDAU,PUTPAGE,SETDISP}
 */

#define MIN_UNIT   (1<<0)
#define MIN_TEN    (1<<1)
#define HR_UNIT    (1<<2)
#define HR_TEN     (1<<3)
#define PG_UNIT    (1<<4)
#define PG_TEN     (1<<5)
#define PG_HUND    (1<<6)
#define PGMASK_MAX (1<<7)
#define PGMASK_PAGE (PG_HUND | PG_TEN | PG_UNIT)
#define PGMASK_HOUR (HR_TEN | HR_UNIT)
#define PGMASK_MINUTE (MIN_TEN | MIN_UNIT)

typedef struct 
{
	int page;	/* number of requested page (hexadecimal) */
	int hour;	/* requested hour (hexadecimal) */
	int minute;	/* requested minute (hexadecimal) */
	int pagemask;	/* mask defining which values of the above are set */
	int pgbuf;	/* buffer where page will be stored */
	int start;	/* start of requested part of page */
	int end;	/* end of requested part of page */
	void *buffer;	/* pointer to beginning of destination buffer */
}
vtx_pagereq_t;


/*
 *	Definitions for VTXIOC{GETSTAT,PUTSTAT}
 */
 
#define VTX_PAGESIZE (40 * 24)
#define VTX_VIRTUALSIZE (40 * 49)

typedef struct 
{
	int pagenum;			/* number of page (hexadecimal) */
	int hour;			/* hour (hexadecimal) */
	int minute;			/* minute (hexadecimal) */
	int charset;			/* national charset */
	unsigned delete : 1;		/* delete page (C4) */
	unsigned headline : 1;		/* insert headline (C5) */
	unsigned subtitle : 1;		/* insert subtitle (C6) */
	unsigned supp_header : 1;	/* suppress header (C7) */
	unsigned update : 1;		/* update page (C8) */
	unsigned inter_seq : 1;		/* interrupted sequence (C9) */
	unsigned dis_disp : 1;		/* disable/suppress display (C10) */
	unsigned serial : 1;		/* serial mode (C11) */
	unsigned notfound : 1;		/* /FOUND */
	unsigned pblf : 1;		/* PBLF */
	unsigned hamming : 1;		/* hamming-error occurred */
}
vtx_pageinfo_t;


/*
 *	Definitions for VTXIOCSETDISP
 */
 
typedef enum { 
	DISPOFF, DISPNORM, DISPTRANS, DISPINS, INTERLACE_OFFSET 
} vtxdisp_t;



/*
 *	Tuner ioctls
 */
 
#define TUNIOCGETINFO  0x7201  /* get version of driver & capabilities of tuner */
#define TUNIOCRESET    0x7202  /* reset tuner */
#define TUNIOCSETFREQ  0x7203  /* set tuning frequency (unit: kHz) */
#define TUNIOCGETFREQ  0x7204  /* get tuning frequency (unit: kHz) */
#define TUNIOCSETCHAN  0x7205  /* set tuning channel */
#define TUNIOCGETCHAN  0x7206  /* get tuning channel */


typedef struct 
{
	int version_major, version_minor;	/* version of driver; if version_major changes, driver */
						/* is not backward compatible!!! CHECK THIS!!! */  
	unsigned freq : 1;			/* tuner can be set to given frequency */
	unsigned chan : 1;			/* tuner stores several channels */
	unsigned scan : 1;			/* tuner supports scanning */
	unsigned autoscan : 1;		/* tuner supports scanning with automatic stop */
	unsigned afc : 1;			/* tuner supports AFC */
	unsigned dummy1, dummy2, dummy3, dummy4, dummy5, dummy6, dummy7, dummy8, dummy9, dummy10,
 		dummy11 : 1;
	int dummy12, dummy13, dummy14, dummy15, dummy16, dummy17, dummy18, dummy19;
} tuner_info_t;


#endif /* _VTX_H */