osd.c

一个两碟控制的VCD的代码,两碟之间的转动及连续播放,已大量生产的CODE.

/* SCCSID @(#)osd.c	1.15 6/4/98 */ 


#ifdef OSD

#include "../mvd.h"
#include "../common.h"
#ifdef SHARE_DATA
#include "../const.h"
#endif
#include "util.h"
#include "osd.h"
#include "display.h"
#include "dispinfo.h"
#include "../vcxi.h"
#include "../vcd.h"
#include "common1.h"


#include "../fsosd.h"

#ifdef OSD_COMPRESS
extern void OSD_decompression (int, unsigned char *, unsigned char *,
			       unsigned char *, unsigned short *);
#endif /* OSD_COMPRESS */

int OSD2_X,OSD2_Y,OSD2_W,OSD2_H;

void EVD_OSD_init(void)
{
    int i;

    OSD_on=0;

    VCD30_OSD_DRAM_START = evd_disp_info[disp_mode].OSD_start;
    mvd[vid_scn_osd_hstart] = OSD_hstart1 = evd_disp_info[disp_mode].OSD_X;
    mvd[vid_scn_osd_hend]   = OSD_hend1 =
		evd_disp_info[disp_mode].OSD_X + evd_disp_info[disp_mode].OSD_W;
    if (vcx_scn_height == 288){
        mvd[vid_scn_osd_vstart] = OSD_vstart1 = evd_disp_info[disp_mode].OSD_Y +2;
        mvd[vid_scn_osd_vend] = OSD_vend1 =
		OSD_vstart1 + evd_disp_info[disp_mode].OSD_H - 1;
    }
    else{
        mvd[vid_scn_osd_vstart] = OSD_vstart1 = (evd_disp_info[disp_mode].OSD_Y )*13/16 + 5;
        mvd[vid_scn_osd_vend] = OSD_vend1 =
		OSD_vstart1 + evd_disp_info[disp_mode].OSD_H - 1; 
    }

    mvd[vid_scn_osd_startstop] = 0x5560;

    mvd[vid_scn_osd_misc]       = 0x44;

    mvd[vid_scn_osd_palette+ 0] = OSD_CLEAR;    	/* 7000,Background   */
    mvd[vid_scn_osd_palette+ 1] = (OSD_BLACK | 0xf);    /* e00b,Edge  */
    mvd[vid_scn_osd_palette+ 2] = (OSD_GREEN | 0xb);    /* 399f,Extra color  */
    mvd[vid_scn_osd_palette+ 3] = (OSD_WHITE | 0xf);    /* 700f,Foreground  */

    mvd[vid_scn_osd_misc]       = 0x40;

    mvd[vid_scn_osd_misc] = 0x01;

    ClrOsd();
    if (disp_mode<2){
        ClrOsd2();
    }
    VCD30_OSD_TOTAL_AREAS = 1;
}

#ifdef BILINGUAL_OSD
void OutputOsd(line, row, emsg, cmsg)
char * cmsg;
#else
void OutputOsd(line, row, emsg)
#endif /* BILINGUAL_OSD */
int line, row;
char * emsg;
{
    int count;
    int head, offset, dest;
    int big;
    int linewidth = evd_disp_info[disp_mode].OSD_W/4; /* In BYTE */
    unsigned char *msg;

#ifdef BILINGUAL_OSD
    msg = (OSD_language == CHINESE_OSD) ? cmsg : emsg;
#else
    msg = emsg;
#endif

    /* Note, OSD_W is in pixels. Each pixel is 2b */
    head = VCD30_OSD_DRAM_START * 4 +
	   ((row-1) * linewidth * OSD_CHAR_HEIGHT/2) + (line-1)*6;
    offset = 0;

    count = 0;

    if (OSD2_Y < 82) { Close_OSD2(); }

    do {
	unsigned int ctmp = msg[count];

	if (ctmp == 0) break;
	big = (ctmp >= FONT_CSTART);
	dest = head + (offset << 2) + (offset << 1);
	OSD_copy_one_char(ctmp, big, dest, (linewidth/4));
	offset++;
	if (big) offset++;
	count++;
    } while (1);
    Open_OSD1();
}

void ClrOsd(void)
{
    long             pDst;
    unsigned int     i, j;
    int tmp;

    tmp = (evd_disp_info[disp_mode].OSD_W>>4)*evd_disp_info[disp_mode].OSD_H;

    ClrOSD_comm(VCD30_OSD_DRAM_START,tmp);
}

void ClrOSD_comm(int addr, int len)
{
    int j;
    int *p;

    p = (int*)dram(addr);
    for( j=0; j<len; j++){
        *(int*)p=0;
        p++;
    }
}

void ClrOsd2(void)
{
    int tmp;
    long             pDst;
    unsigned int     i, j;

    tmp = (evd_disp_info[disp_mode].OSD_H)*(evd_disp_info[disp_mode].OSD_W>>4);
    ClrOSD_comm(VCD30_OSD_DRAM_START+tmp,OSD_size-tmp);
}


void OSD2_rect(int x, int y, int w, int h)
{
    long             pDst;
    unsigned int     i, j, k;
    int tmp, htmp;
    unsigned int mask = 0xa0000000;

    Close_OSD2();
    OSD2_X = x;
    OSD2_Y = y;
    OSD2_W = w;
    OSD2_H = h;
    htmp = OSD2_comm(x,y,w,h);
    tmp = (evd_disp_info[disp_mode].OSD_H)*(evd_disp_info[disp_mode].OSD_W>>4);
    pDst = VCD30_OSD_DRAM_START+tmp;

    tmp = 0;
    for (k=0;k<(w&0x07);k++){
        tmp |= mask;
        mask >>= 4;
    }
 
    for ( i= 0; i < htmp; i++){
	for (j=0; j<w>>3; j++){
            *(long*)dram(pDst)=0xaaaaaaaa;
            pDst++;
	}
	if (w&0x07){
            *(long*)dram(pDst)=tmp;
            pDst++;
	}
    }
}

int OSD2_comm(int x, int y, int w, int h)
{
    OSD_hstart2 = x<<1;
    OSD_hend2 = (x+(((w+7)>>3)<<3))<<1;         /*to keep it DW boundary*/
    if (vcx_scn_height == 240){
        OSD_vstart2 = y*13/16+5;
        OSD_vend2 = (y+h-1)*13/16+5;
        return(h*13/16);
    }
    else{
        OSD_vstart2 = y +2;
        OSD_vend2 = y+h-1 +2;
        return(h);
    }
}

void OSD2(int x, int y, int w, int h)
{
    long             pDst;
    unsigned int     i, j;
    int tmp, htmp;

    if (y<82) {
	Close_OSD1();
    }
    OSD2_comm(x,y,w,h);
}

void Close_OSD1()
{
    OSD1 = 0;
    ClrOsd();
}
 
void Close_OSD2()
{
    VCD30_OSD_TOTAL_AREAS = 1;
    ClrOsd2();
}

#if 0
void Open_OSD1()
{
    OSD1 = 1;
}

void Open_OSD2()
{
    VCD30_OSD_TOTAL_AREAS = 2;
}

void Stop_OSD()
{
    OSD_on = 0;
}

void Start_OSD()
{
    OSD_on = 1;
}

#endif
/* trans is 0-7: 0: trans, 7: overlay */
void OSD_color(int color, int trans)
{
    mvd[vid_scn_osd_startstop]  = 0x5560; /* cr = 5, b = 21, e = 32 */
    mvd[vid_scn_osd_misc]       = 0x4;
    mvd[vid_scn_osd_palette+ 2] = (color | 0x8 | trans);    /* 399f,Extra color  */
}

#endif