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period time now in floating point

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tth 2019-08-14 19:29:11 +02:00
parent db037c5d12
commit 556522f647
1 changed files with 13 additions and 7 deletions
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20
v4l2/grabvidseq.c
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@ -91,15 +91,15 @@ struct timeval tv;
int r, fd = -1; int r, fd = -1;
unsigned int i, n_buffers; unsigned int i, n_buffers;
char *dev_name = "/dev/video0"; char *dev_name = "/dev/video0";
char out_name[256];
FILE *fout; FILE *fout;
struct buffer *buffers; struct buffer *buffers;
int foo, bar; int foo, bar;
int period = 10; /* delai entre les captures */ double period = 10.0; /* delai entre les captures */
int nbre_capt = 1; /* nombre de captures */ int nbre_capt = 1; /* nombre de captures */
int opt; int opt;
double t_debut, t_final; double t_final;
char *dest_dir = "."; /* no trailing slash */ char *dest_dir = "."; /* no trailing slash */
char *outfile = "out.pnm"; char *outfile = "out.pnm";
@ -114,13 +114,14 @@ while ((opt = getopt(argc, argv, "d:hn:o:O:p:v")) != -1) {
case 'n': nbre_capt = atoi(optarg); break; case 'n': nbre_capt = atoi(optarg); break;
case 'O': dest_dir = optarg; break; case 'O': dest_dir = optarg; break;
case 'o': outfile = optarg; break; case 'o': outfile = optarg; break;
case 'p': period = atoi(optarg); break; case 'p': period = 1e6*atof(optarg); break;
case 'v': verbosity++; break; case 'v': verbosity++; break;
} }
} }
if (verbosity) { if (verbosity) {
fprintf(stderr, "running %s pid=%d\n", argv[0], getpid()); fprintf(stderr, "running %s pid=%d\n", argv[0], getpid());
fprintf(stderr, "period is %.3f microseconds\n", period);
} }
fd = v4l2_open(dev_name, O_RDWR | O_NONBLOCK, 0); fd = v4l2_open(dev_name, O_RDWR | O_NONBLOCK, 0);
@ -172,7 +173,7 @@ for (n_buffers = 0; n_buffers < req.count; ++n_buffers) {
} }
} }
t_debut = fimg_timer_set(0); (void)fimg_timer_set(0);
for (i = 0; i < n_buffers; ++i) { for (i = 0; i < n_buffers; ++i) {
CLEAR(buf); CLEAR(buf);
@ -218,6 +219,11 @@ for (i = 0; i < nbre_capt; i++) {
return errno; return errno;
} }
if(verbosity > 1) {
printf("%6d %5.3f\n", i, fimg_timer_get(0));
}
CLEAR(buf); CLEAR(buf);
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP; buf.memory = V4L2_MEMORY_MMAP;
@ -253,8 +259,8 @@ for (i = 0; i < nbre_capt; i++) {
out_name); out_name);
#endif #endif
if (nbre_capt > 1 && period) { if (nbre_capt > 1 && period > 1.0) {
sleep(period); usleep(period);
} }
xioctl(fd, VIDIOC_QBUF, &buf); xioctl(fd, VIDIOC_QBUF, &buf);