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/* capture a PPM image using YUV planer format and single capture mode */
/* Copyright (c) 1995 Mark Tinguely and Jim Lowe
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Mark Tinguely and Jim Lowe
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/types.h>
#include <sys/mman.h>
#include <sys/fcntl.h>
/*#include <machine/ioctl_meteor.h>*/
#include "/sys/i386/include/ioctl_meteor.h"
typedef unsigned char uint8;
typedef signed char int8;
static uint8 *yuv_data;
static int8 *ue, *uo, *ve, *vo;
extern int errno;
#define ROWS 480
#define COLS 640
#define SIZE (ROWS * COLS * 2)
main()
{
struct meteor_geomet geo;
char b[4],header[16],*p;
int i,o,c,r;
int y1,y2,u,v;
int temp;
if ((i = open("/dev/meteor", O_RDONLY)) < 0) {
printf("open failed: %d\n", errno);
exit(1);
}
/* set up the capture type and size */
geo.rows = ROWS;
geo.columns = COLS;
geo.frames = 1;
geo.oformat = METEOR_GEO_YUV_PLANER;
if (ioctl(i, METEORSETGEO, &geo) < 0) {
printf("ioctl failed: %d\n", errno);
exit(1);
}
c = METEOR_FMT_NTSC;
if (ioctl(i, METEORSFMT, &c) < 0) {
printf("ioctl failed: %d\n", errno);
exit(1);
}
c = METEOR_INPUT_DEV0;
if (ioctl(i, METEORSINPUT, &c) < 0) {
printf("ioctl failed: %d\n", errno);
exit(1);
}
yuv_data = (uint8 *)mmap((caddr_t)0,SIZE,PROT_READ,MAP_SHARED, i, (off_t)0);
if (yuv_data == (uint8 *) MAP_FAILED) return (0);
temp = ROWS * COLS;
ue = yuv_data + temp;
temp = temp / 4;
ve = ue + temp;
uo = ve + temp;
vo = uo + temp;
printf("data locations = %08x %08x %08x %08x %08x \n", yuv_data,ue,ve,uo,vo);
c = METEOR_CAP_SINGLE ;
ioctl(i, METEORCAPTUR, &c);
printf("read done %d %d\n", errno, i);
if ((o = open("yuvpl.ppm", O_WRONLY | O_CREAT, 0644)) < 0) {
printf("ppm open failed: %d\n", errno);
exit(1);
}
/* make PPM header and save to file */
strcpy(&header[0], "P6 640 480 255 ");
header[2] = header[6] = header[10] = header[14] = '\n';
write (o, &header[0], 15);
for (r = 0 ; r < ROWS ; r++) {
for (c = 0 ; c < COLS / 2; c++) {
if ((y1 = *yuv_data++) < 0) y1 += 256;
if ((y2 = *yuv_data++) < 0) y2 += 256;
if (r & 1) { /* odd */
u = *uo++ ;
v = *vo++;
}
else { /* even */
u = *ue++;
v = *ve++;
}
b[0]= (double)y1 + 1.375 * (double)v ; /*r*/
b[1]= (double)y1 - 0.703125 * (double)v -0.34375 * (double)u ; /* g */
b[2]= (double)y1 + 1.734375 * (double)u ; /* b */
b[3]= (double)y2 + 1.375 * (double)v ; /*r*/
b[4]= (double)y2 - 0.703125 * (double)v -0.34375 * (double)u ; /* g */
b[5]= (double)y2 + 1.734375 * (double)u ; /* b */
write(o,&b[0], 6);
}
}
close(o);
close(i);
exit(0);
}
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