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https://github.com/python/cpython.git
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79 lines
1.8 KiB
C
Executable file
79 lines
1.8 KiB
C
Executable file
/* Convert the first image of a CMIF video movie file to SGI .rgb format.
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usage: v2i videofile imagefile [planemask]
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link with -limage
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*/
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#include <stdio.h>
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#include <gl/image.h>
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long bm[1280];
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short rb[1280], gb[1280], bb[1280];
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long w, h, pf;
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#define R(comp) ((comp) & 0xff)
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#define G(comp) (((comp)>>8) & 0xff)
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#define B(comp) (((comp)>>16) & 0xff)
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main(argc, argv)
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char **argv;
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{
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char lbuf[100];
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int x, y;
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int i;
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IMAGE * of;
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int pmask;
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if( argc != 3 && argc != 4) {
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fprintf(stderr, "Usage: v2i videofile imgfile [planemask]\n");
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exit(2);
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}
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if ( argc == 4)
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pmask = atoi(argv[3]);
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else
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pmask = 7;
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if ( freopen(argv[1], "r", stdin) == NULL ) {
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perror(argv[1]);
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exit(1);
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}
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if (fgets(lbuf, sizeof lbuf, stdin) == NULL) {
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fprintf(stderr, "Immediate EOF\n");
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exit(1);
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}
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if (strncmp(lbuf, "CMIF", 4) == 0) {
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/* Skip optional header line */
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if (fgets(lbuf, sizeof lbuf, stdin) == NULL) {
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fprintf(stderr, "Immediate EOF after header\n");
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exit(1);
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}
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}
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pf = 2; /* Default */
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if ( sscanf(lbuf, "(%d,%d,%d)", &w, &h, &pf) < 2) {
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fprintf(stderr, "%s: bad size spec: %s\n", argv[0], lbuf);
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exit(1);
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}
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fgets(lbuf, sizeof lbuf, stdin); /* Skip time info */
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if ( w > 1280 ) {
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fprintf(stderr, "%s: Sorry, too wide\n", argv[0]);
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exit(1);
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}
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if ( (of=iopen(argv[2], "w", RLE(1), 3, w, h, 3)) == 0) {
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perror(argv[2]);
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exit(1);
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}
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for( y=0; y<h; y++) {
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if( fread(bm, sizeof(long), w, stdin) != w) {
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fprintf(stderr, "%s: short read\n", argv[0]);
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exit(1);
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}
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for( x=0; x<w; x++) {
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if ( pmask & 1) rb[x] = R(bm[x]);
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if ( pmask & 2) gb[x] = G(bm[x]);
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if ( pmask & 4) bb[x] = B(bm[x]);
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}
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putrow(of, rb, y, 0);
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putrow(of, gb, y, 1);
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putrow(of, bb, y, 2);
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}
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iclose(of);
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exit(0);
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}
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