share/examples/meteor/rgb24.c

   1         /* capture a PPM file using 24 bit RGB image and read() */
   2 /* Copyright (c) 1995 Mark Tinguely and Jim Lowe
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by Mark Tinguely and Jim Lowe
  16  * 4. The name of the author may not be used to endorse or promote products
  17  *    derived from this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  21  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  22  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
  23  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  24  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  25  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  27  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  28  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <sys/fcntl.h>
  33 /*#include <machine/ioctl_meteor.h>*/
  34 #include "/sys/i386/include/ioctl_meteor.h"
  35
  36 extern int errno;
  37 #define ROWS 300
  38 #define COLS 400
  39 #define SIZE (ROWS * COLS * 4)
  40 main()
  41 {
  42         struct meteor_geomet geo;
  43         char buf[SIZE],b[4],header[16],*p;
  44         int i,o,c;
  45
  46         if ((i = open("/dev/meteor", O_RDONLY)) < 0) {
  47                 printf("open failed: %d\n", errno);
  48                 exit(1);
  49         }
  50                                 /* set up the capture type and size */
  51         geo.rows = ROWS;
  52         geo.columns = COLS;
  53         geo.frames = 1;
  54         geo.oformat = METEOR_GEO_RGB24 ;
  55
  56         if (ioctl(i, METEORSETGEO, &geo) < 0) {
  57                 printf("ioctl failed: %d\n", errno);
  58                 exit(1);
  59         }
  60
  61         c = METEOR_FMT_NTSC;
  62
  63         if (ioctl(i, METEORSFMT, &c) < 0) {
  64                 printf("ioctl failed: %d\n", errno);
  65                 exit(1);
  66         }
  67
  68         c = METEOR_INPUT_DEV0;
  69
  70         if (ioctl(i, METEORSINPUT, &c) < 0) {
  71                 printf("ioctl failed: %d\n", errno);
  72                 exit(1);
  73         }
  74
  75         if ((c=read(i, &buf[0], SIZE)) < SIZE) {
  76                 printf("read failed %d %d %d\n", c, i, errno);
  77                 close(i);
  78                 exit(1);
  79         }
  80         close(i);
  81
  82         if ((o = open("rgb24.ppm", O_WRONLY | O_CREAT, 0644)) < 0) {
  83                 printf("ppm open failed: %d\n", errno);
  84                 exit(1);
  85         }
  86
  87                 /* make PPM header and save to file */
  88         strcpy(&header[0], "P6 400 300 255 ");
  89         header[2] = header[6]  = header[10] = header[14] = '\n';
  90         write (o, &header[0], 15);
  91                 /* save the RGB data to PPM file */
  92         for (p = &buf[0]; p < &buf[SIZE]; ) {
  93                 b[2] = *p++;            /* blue */
  94                 b[1] = *p++;            /* green */
  95                 b[0] = *p++;            /* red */
  96                 *p++;                   /* NULL byte */
  97                 write(o,&b[0], 3);      /* not very efficient */
  98         }
  99         close(o);
 100         exit(0);
 101 }