int main(int argc, char *argv[])
{
struct device dev;
int ret;
/* Options parsings */
int do_file = 0, do_capture = 0, do_pause = 0;
int do_set_time_per_frame = 0;
int do_enum_formats = 0, do_set_format = 0;
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 no_query = 0;
char *endptr;
int c;
/* Controls */
int ctrl_name = 0;
int ctrl_value = 0;
/* Video buffers */
enum v4l2_memory memtype = V4L2_MEMORY_MMAP;
unsigned int pixelformat = V4L2_PIX_FMT_YUYV;
unsigned int width = 640;
unsigned int height = 480;
unsigned int nbufs = V4L_BUFFERS_DEFAULT;
unsigned int input = 0;
unsigned int skip = 0;
unsigned int quality = (unsigned int)-1;
unsigned int userptr_offset = 0;
struct v4l2_fract time_per_frame = {1, 25};
/* Capture loop */
unsigned int delay = 0, nframes = (unsigned int)-1;
const char *filename = "/dev/shm/capture.output";
opterr = 0;
while ((c = getopt_long(argc, argv, "c::d:f:F::hi:ln:pq:r:s:t:uw:", opts, NULL)) != -1) {
switch (c) {
case 'c':
do_capture = 1;
if (optarg)
nframes = atoi(optarg);
break;
case 'd':
delay = atoi(optarg);
break;
case 'f':
do_set_format = 1;
if (strcasecmp(optarg, "MJPEG") == 0)
pixelformat = V4L2_PIX_FMT_MJPEG;
else if (strcasecmp(optarg, "YUYV") == 0)
pixelformat = V4L2_PIX_FMT_YUYV;
else if (strcasecmp(optarg, "UYVY") == 0)
pixelformat = V4L2_PIX_FMT_UYVY;
else if (strcasecmp(optarg, "Y16") == 0)
pixelformat = V4L2_PIX_FMT_Y16;
else if (strcasecmp(optarg, "SGRBG10_DPMC8") == 0)
pixelformat = V4L2_PIX_FMT_SGRBG10DPCM8;
else if (strcasecmp(optarg, "SGRBG10") == 0)
pixelformat = V4L2_PIX_FMT_SGRBG10;
#ifdef V4L2_PIX_FMT_SGRBG12
else if (strcasecmp(optarg, "SGRBG12") == 0)
pixelformat = V4L2_PIX_FMT_SGRBG12;
#endif
else if (strcasecmp(optarg, "DV") == 0)
pixelformat = V4L2_PIX_FMT_DV;
else {
printf("Unsupported video format '%s'\n", optarg);
return 1;
}
break;
case 'F':
do_file = 1;
if (optarg)
filename = optarg;
break;
case 'h':
usage(argv[0]);
return 0;
case 'i':
do_set_input = 1;
input = atoi(optarg);
break;
case 'l':
do_list_controls = 1;
break;
case 'n':
nbufs = atoi(optarg);
if (nbufs > V4L_BUFFERS_MAX)
nbufs = V4L_BUFFERS_MAX;
break;
case 'p':
do_pause = 1;
break;
case 'q':
quality = atoi(optarg);
break;
case 'r':
ctrl_name = strtol(optarg, &endptr, 0);
if (*endptr != 0) {
printf("Invalid control name '%s'\n", optarg);
return 1;
}
do_get_control = 1;
break;
case 's':
do_set_format = 1;
width = strtol(optarg, &endptr, 10);
if (*endptr != 'x' || endptr == optarg) {
printf("Invalid size '%s'\n", optarg);
return 1;
}
height = strtol(endptr + 1, &endptr, 10);
if (*endptr != 0) {
printf("Invalid size '%s'\n", optarg);
return 1;
}
break;
case 't':
do_set_time_per_frame = 1;
time_per_frame.numerator = strtol(optarg, &endptr, 10);
if (*endptr != '/' || endptr == optarg) {
printf("Invalid time per frame '%s'\n", optarg);
return 1;
}
time_per_frame.denominator = strtol(endptr + 1, &endptr, 10);
if (*endptr != 0) {
printf("Invalid time per frame '%s'\n", optarg);
return 1;
}
break;
case 'u':
memtype = V4L2_MEMORY_USERPTR;
break;
case 'w':
ctrl_name = strtol(optarg, &endptr, 0);
if (*endptr != ' ' || endptr == optarg) {
printf("Invalid control name '%s'\n", optarg);
return 1;
}
ctrl_value = strtol(endptr + 1, &endptr, 0);
if (*endptr != 0) {
printf("Invalid control value '%s'\n", optarg);
return 1;
}
do_set_control = 1;
break;
case OPT_ENUM_FORMATS:
do_enum_formats = 1;
break;
case OPT_ENUM_INPUTS:
do_enum_inputs = 1;
break;
case OPT_NO_QUERY:
no_query = 1;
break;
case OPT_REQUEUE_LAST:
do_requeue_last = 1;
break;
case OPT_SKIP_FRAMES:
skip = atoi(optarg);
break;
case OPT_SLEEP_FOREVER:
do_sleep_forever = 1;
break;
case OPT_USERPTR_OFFSET:
userptr_offset = atoi(optarg);
break;
default:
printf("Invalid option -%c\n", c);
printf("Run %s -h for help.\n", argv[0]);
return 1;
}
}
if (optind >= argc) {
usage(argv[0]);
return 1;
}
if (!do_file)
filename = NULL;
/* Open the video device. */
ret = video_open(&dev, argv[optind], no_query);
if (ret < 0)
return 1;
dev.memtype = memtype;
if (do_get_control)
uvc_get_control(&dev, ctrl_name);
if (do_set_control)
uvc_set_control(&dev, ctrl_name, ctrl_value);
if (do_list_controls)
video_list_controls(&dev);
if (do_enum_formats) {
printf("- Available formats:\n");
video_enum_formats(&dev, V4L2_BUF_TYPE_VIDEO_CAPTURE);
video_enum_formats(&dev, V4L2_BUF_TYPE_VIDEO_OUTPUT);
video_enum_formats(&dev, V4L2_BUF_TYPE_VIDEO_OVERLAY);
}
if (do_enum_inputs) {
printf("- Available inputs:\n");
video_enum_inputs(&dev);
}
if (do_set_input) {
video_set_input(&dev, input);
ret = video_get_input(&dev);
printf("Input %d selected\n", ret);
}
/* Set the video format. */
if (do_set_format) {
if (video_set_format(&dev, width, height, pixelformat) < 0) {
video_close(&dev);
return 1;
}
}
if (!no_query || do_capture)
video_get_format(&dev);
/* Set the frame rate. */
if (do_set_time_per_frame) {
if (video_set_framerate(&dev, &time_per_frame) < 0) {
video_close(&dev);
return 1;
}
}
while (do_sleep_forever)
sleep(1000);
if (!do_capture) {
video_close(&dev);
return 0;
}
/* Set the compression quality. */
if (video_set_quality(&dev, quality) < 0) {
video_close(&dev);
return 1;
}
if (video_prepare_capture(&dev, nbufs, userptr_offset, filename)) {
video_close(&dev);
return 1;
}
if (do_pause) {
printf("Press enter to start capture\n");
getchar();
}
if (video_do_capture(&dev, nframes, skip, delay, filename, do_requeue_last) < 0) {
video_close(&dev);
return 1;
}
video_close(&dev);
return 0;
}
void set_control(unsigned int id, int value) { uvc_set_control(dev,id,value); };
