share/examples/meteor/rgb16.c

   1 /* capture a PPM image using RGB16  and single capture mode */
   2
   3 /* Copyright (c) 1995 Mark Tinguely and Jim Lowe
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. All advertising materials mentioning features or use of this software
  15  *    must display the following acknowledgement:
  16  *      This product includes software developed by Mark Tinguely and Jim Lowe
  17  * 4. The name of the author may not be used to endorse or promote products
  18  *    derived from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  22  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  23  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
  24  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  25  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  26  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  28  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  29  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  30  * POSSIBILITY OF SUCH DAMAGE.
  31  */
  32 #include <sys/types.h>
  33 #include <sys/mman.h>
  34 #include <sys/fcntl.h>
  35 /*#include <machine/ioctl_meteor.h>*/
  36 #include "/sys/i386/include/ioctl_meteor.h"
  37
  38 extern int errno;
  39 #define ROWS 480
  40 #define COLS 640
  41 #define SIZE (ROWS * COLS * 2)
  42 main()
  43 {
  44         struct meteor_geomet geo;
  45         short *rgb16;
  46         char b[4];
  47         char header[16];
  48         int i,o,c;
  49
  50         if ((i = open("/dev/meteor", O_RDONLY)) < 0) {
  51                 printf("open failed: %d\n", errno);
  52                 exit(1);
  53         }
  54                                 /* set up the capture type and size */
  55         geo.rows = ROWS;
  56         geo.columns = COLS;
  57         geo.frames = 1;
  58
  59         geo.oformat = METEOR_GEO_RGB16;
  60
  61         if (ioctl(i, METEORSETGEO, &geo) < 0) {
  62                 printf("ioctl failed: %d\n", errno);
  63                 exit(1);
  64         }
  65
  66         c = METEOR_FMT_NTSC;
  67
  68         if (ioctl(i, METEORSFMT, &c) < 0) {
  69                 printf("ioctl failed: %d\n", errno);
  70                 exit(1);
  71         }
  72
  73         c = METEOR_INPUT_DEV0;
  74
  75         if (ioctl(i, METEORSINPUT, &c) < 0) {
  76                 printf("ioctl failed: %d\n", errno);
  77                 exit(1);
  78         }
  79
  80         rgb16 = (short *)mmap((caddr_t)0,SIZE,PROT_READ,MAP_SHARED, i, (off_t)0);
  81
  82         if (rgb16 == (short *) MAP_FAILED) return (0);
  83
  84         c = METEOR_CAP_SINGLE ;
  85         ioctl(i, METEORCAPTUR, &c);
  86
  87         if ((o = open("rgb16.ppm", O_WRONLY | O_CREAT, 0644)) < 0) {
  88                 printf("ppm open failed: %d\n", errno);
  89                 exit(1);
  90         }
  91
  92                 /* make PPM header and save to file */
  93         strcpy(&header[0], "P6 640 480 255 ");
  94         header[2] = header[6]  = header[10] = header[14] = '\n';
  95         write (o, &header[0], 15);
  96
  97         for (c = 0 ; c < ROWS*COLS; c++) {
  98                 b[0]= ((*rgb16 >> 7) & 0xf8);   /* r */
  99                 b[1]= ((*rgb16 >> 2) & 0xf8);   /* g */
 100                 b[2]= ((*rgb16++ << 3) & 0xf8); /* b */
 101                 write(o, &b[0], 3);
 102         }
 103         close(o);
 104         close(i);
 105         exit(0);
 106 }