#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <asm/ioctl.h>
#include <sys/mman.h>


/*IOCTLs*/
//#define IOCTLSETCURSOR _IOW('v', 21, unsigned int) //set cursor position
#define VIDEO_ACTIVE_WINDOW_COORDINATES _IOW('v', 22, unsigned int) //set display-start line in display buffer
//#define IOCTLREADSTATUS _IOW('v', 23, unsigned int) //read lcd module status
#define VIDEO_DISPLAY_ON _IOW('v', 24, unsigned int) //display on
#define VIDEO_DISPLAY_OFF _IOW('v', 25, unsigned int) //display off
//#define IOCTLCLEARSCREEN _IOW('v', 26, unsigned int) //clear screen
#define VIDEO_UPSCALING _IOW('v', 27, unsigned int) //video up scaling

/* Macros about LCM */
#define CMD_DISPLAY_ON 0x3F
#define CMD_DISPLAY_OFF 0x3E
#define CMD_SET_COL_ADDR 0x40
#define CMD_SET_ROW_ADDR 0xB8
#define CMD_SET_DISP_START_LINE 0xC0


#define LCD_WIDTH 320
#define LCD_HEIGHT 240

typedef struct
{
unsigned int start;
unsigned int end;
}ActiveWindow;

typedef struct
{
int hor;
int ver;
}video_scaling;

int main()
{
int fd, ret;
int i, t = 0;
FILE *fpVideoImg;
unsigned char *pVideoBuffer;
unsigned long uVideoSize;

ActiveWindow window;
unsigned int uStartLine;
video_scaling v_scaling;
unsigned int select = 0;

fd = open("/dev/fb0", O_RDWR);
if (fd == -1)
{
printf("Cannot open fb0!\n");
return -1;
}

uVideoSize = LCD_WIDTH * LCD_HEIGHT * 2;
// printf("uVideoSize = 0x%x \n", uVideoSize);
pVideoBuffer = mmap(NULL, uVideoSize, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
// printf("pVideoBuffer = 0x%x\n", pVideoBuffer);
if(pVideoBuffer == MAP_FAILED)
{
printf("LCD Video Map Failed!\n");
exit(0);
}
//memset(pVideoBuffer, 0xf8, uVideoSize);

fpVideoImg = fopen("/attach/video.dat", "r");
if(fpVideoImg == NULL)
{
printf("OSD open FILE fail !! \n");
exit(0);
}

#if 1
if( fread(pVideoBuffer, uVideoSize, 1, fpVideoImg) <= 0)
{
printf("Cannot Read the Image File!\n");
exit(0);
}
#endif

while(select != 0xFF)
{
printf("\n************* LCM demo ************\n");
printf("1.Video Display On ..\n");
printf("2.Video Display Off ..\n");
printf("3.Change start line in buffer ..\n");
printf("4.Scaling Up ..\n");

printf("X.Exit ..\n");
printf("\n***********************************\n");
printf("Select : \n");
select = getchar();
switch(select)
{
case 0x31:
ioctl(fd,VIDEO_DISPLAY_ON);
break;

case 0x32:
ioctl(fd,VIDEO_DISPLAY_OFF);
break;

case 0x33:
/*Change start line in buffer*/
printf("Start Line: \n" );
scanf("%d", &uStartLine);

ioctl(fd, VIDEO_ACTIVE_WINDOW_COORDINATES, &uStartLine);
break;

case 0x34:
printf("Up Scaling: \n");
printf("X: \n");
scanf("%d", &v_scaling.hor);

printf("Y: \n");
scanf("%d", &v_scaling.ver);

ioctl(fd, VIDEO_UPSCALING, &v_scaling);
break;

case 0x58: //'x' -- exit the program
case 0x78: //'X'
printf("Exit now.\n");
goto end;

default :
printf("Please select the right command number... \n");
break;
}
}

end:
/* Close LCD */
//ioctl(fd, VIDEO_DISPLAY_OFF);
close(fd);
return 0;
}