diff options
| -rw-r--r-- | yavta.c | 22 |
1 files changed, 21 insertions, 1 deletions
@@ -25,6 +25,7 @@ #include <stdlib.h> #include <errno.h> #include <getopt.h> +#include <sched.h> #include <sys/ioctl.h> #include <sys/mman.h> #include <sys/select.h> @@ -1012,6 +1013,7 @@ static void usage(const char *argv0) printf("-p, --pause Pause before starting the video stream\n"); printf("-q, --quality n MJPEG quality (0-100)\n"); printf("-r, --get-control ctrl Get control 'ctrl'\n"); + printf("-R, --realtime=[priority] Enable realtime RR scheduling\n"); printf("-s, --size WxH Set the frame size\n"); printf("-t, --time-per-frame num/denom Set the time per frame (eg. 1/25 = 25 fps)\n"); printf("-u, --userptr Use the user pointers streaming method\n"); @@ -1050,6 +1052,7 @@ static struct option opts[] = { {"quality", 1, 0, 'q'}, {"get-control", 1, 0, 'r'}, {"requeue-last", 0, 0, OPT_REQUEUE_LAST}, + {"realtime", 2, 0, 'R'}, {"size", 1, 0, 's'}, {"set-control", 1, 0, 'w'}, {"skip", 1, 0, OPT_SKIP_FRAMES}, @@ -1061,6 +1064,7 @@ static struct option opts[] = { int main(int argc, char *argv[]) { + struct sched_param sched; struct device dev; int ret; @@ -1071,6 +1075,7 @@ int main(int argc, char *argv[]) int do_enum_inputs = 0, do_set_input = 0; int do_list_controls = 0, do_get_control = 0, do_set_control = 0; int do_sleep_forever = 0, do_requeue_last = 0; + int do_rt = 0; int no_query = 0; char *endptr; int c; @@ -1095,8 +1100,10 @@ int main(int argc, char *argv[]) unsigned int delay = 0, nframes = (unsigned int)-1; const char *filename = "frame"; + unsigned int rt_priority = 1; + opterr = 0; - while ((c = getopt_long(argc, argv, "c::d:f:F::hi:ln:pq:r:s:t:uw:", opts, NULL)) != -1) { + while ((c = getopt_long(argc, argv, "c::d:f:F::hi:ln:pq:r:R::s:t:uw:", opts, NULL)) != -1) { switch (c) { case 'c': @@ -1149,6 +1156,11 @@ int main(int argc, char *argv[]) } do_get_control = 1; break; + case 'R': + do_rt = 1; + if (optarg) + rt_priority = atoi(optarg); + break; case 's': do_set_format = 1; width = strtol(optarg, &endptr, 10); @@ -1308,6 +1320,14 @@ int main(int argc, char *argv[]) getchar(); } + if (do_rt) { + memset(&sched, 0, sizeof sched); + sched.sched_priority = rt_priority; + ret = sched_setscheduler(0, SCHED_RR, &sched); + if (ret < 0) + printf("Failed to select RR scheduler (%d)\n", errno); + } + if (video_do_capture(&dev, nframes, skip, delay, filename, do_requeue_last) < 0) { video_close(&dev); return 1; |