Demo/sgi/video/svgrab24.c

   1 /*
   2  * svgrab24 - Grab the current video input image into an rgb file.
   3  *
   4  * Jack Jansen, CWI, May 93.
   5  *
   6  * Adapted from grabone.c
   7  */
   8
   9 #ident "$Revision$"
  10
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <svideo.h>
  14 #include <gl/gl.h>
  15 #include <gl/device.h>
  16 #include <getopt.h>
  17 #include <image.h>
  18
  19 main(int argc, char *argv[])
  20 {
  21     SVhandle V;
  22     svCaptureInfo ci;
  23     boolean debug;
  24     int ch, errflg;
  25     int bufferSize;
  26     long *buffer;
  27     IMAGE *imgfile;
  28     short *r, *g, *b;
  29     int x, y;
  30     char *ProgName = argv[0];
  31
  32     debug = FALSE;
  33     ci.format = SV_RGB32_FRAMES;
  34     ci.width = 0;
  35     ci.height = 0;
  36     ci.size = 1;
  37
  38     argv++; argc--;
  39     if ( argc > 2 && strcmp(argv[0], "-w") == 0) {
  40         ci.width = atoi(argv[1]);
  41         argc -= 2;
  42         argv += 2;
  43     }
  44     if ( argc != 1 ) {
  45         fprintf(stderr, "Usage: %s [-w width] rgbfilename\n", ProgName);
  46         exit(1);
  47     }
  48
  49     /* Open video device */
  50     if ((V = svOpenVideo()) == NULL) {
  51         svPerror("open");
  52         exit(1);
  53     }
  54
  55     if (svQueryCaptureBufferSize(V, &ci, &bufferSize) < 0) {
  56         svPerror("svQueryCaptureBufferSize");
  57         exit(1);
  58     }
  59     buffer = malloc(bufferSize);
  60
  61     if (svCaptureOneFrame(V, ci.format, &ci.width, &ci.height, buffer) < 0) {
  62         svPerror("svCaptureOneFrame");
  63         exit(1);
  64     }
  65     if (debug) {
  66         printf("captured size: %d by %d\n", ci.width, ci.height);
  67     }
  68
  69     if ( (imgfile=iopen(argv[0], "w", RLE(1), 3, ci.width, ci.height, 3)) == 0) {
  70         perror(argv[1]);
  71         exit(1);
  72     }
  73     r = (short *)malloc(ci.width*sizeof(short));
  74     g = (short *)malloc(ci.width*sizeof(short));
  75     b = (short *)malloc(ci.width*sizeof(short));
  76     if ( !r || !g || !b ) {
  77         fprintf(stderr, "%s: malloc failed\n", ProgName);
  78         exit(1);
  79     }
  80     for(y=0; y<ci.height; y++) {
  81         for(x=0; x<ci.width; x++) {
  82             unsigned long data = *buffer++;
  83
  84             r[x] = data & 0xff;
  85             g[x] = (data>>8) & 0xff;
  86             b[x] = (data>>16) & 0xff;
  87         }
  88         if ( putrow(imgfile, r, y, 0) == 0 ||
  89              putrow(imgfile, g, y, 1) == 0 ||
  90              putrow(imgfile, b, y, 2) == 0) {
  91                fprintf(stderr, "%s: putrow failed\n", ProgName);
  92                exit(1);
  93         }
  94     }
  95     iclose(imgfile);
  96     exit(0);
  97 }