static int print_control(int fd, struct v4l2_query_ext_ctrl &qctrl, int show_menus)
{
struct v4l2_control ctrl;
struct v4l2_ext_control ext_ctrl;
struct v4l2_ext_controls ctrls;
memset(&ctrl, 0, sizeof(ctrl));
memset(&ext_ctrl, 0, sizeof(ext_ctrl));
memset(&ctrls, 0, sizeof(ctrls));
if (qctrl.flags & V4L2_CTRL_FLAG_DISABLED)
return 1;
if (qctrl.type == V4L2_CTRL_TYPE_CTRL_CLASS) {
printf("\n%s\n\n", qctrl.name);
return 1;
}
ext_ctrl.id = qctrl.id;
if ((qctrl.flags & V4L2_CTRL_FLAG_WRITE_ONLY) ||
qctrl.type == V4L2_CTRL_TYPE_BUTTON) {
print_qctrl(fd, &qctrl, &ext_ctrl, show_menus);
return 1;
}
if (qctrl.type >= V4L2_CTRL_COMPOUND_TYPES) {
print_qctrl(fd, &qctrl, NULL, show_menus);
return 1;
}
ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(qctrl.id);
ctrls.count = 1;
ctrls.controls = &ext_ctrl;
if (qctrl.type == V4L2_CTRL_TYPE_INTEGER64 ||
qctrl.type == V4L2_CTRL_TYPE_STRING ||
(V4L2_CTRL_ID2CLASS(qctrl.id) != V4L2_CTRL_CLASS_USER &&
qctrl.id < V4L2_CID_PRIVATE_BASE)) {
if (qctrl.type == V4L2_CTRL_TYPE_STRING) {
ext_ctrl.size = qctrl.maximum + 1;
ext_ctrl.string = (char *)malloc(ext_ctrl.size);
ext_ctrl.string[0] = 0;
}
if (test_ioctl(fd, VIDIOC_G_EXT_CTRLS, &ctrls)) {
printf("error %d getting ext_ctrl %s\n",
errno, qctrl.name);
return 0;
}
}
else {
ctrl.id = qctrl.id;
if (test_ioctl(fd, VIDIOC_G_CTRL, &ctrl)) {
printf("error %d getting ctrl %s\n",
errno, qctrl.name);
return 0;
}
ext_ctrl.value = ctrl.value;
}
print_qctrl(fd, &qctrl, &ext_ctrl, show_menus);
if (qctrl.type == V4L2_CTRL_TYPE_STRING)
free(ext_ctrl.string);
return 1;
}
static int print_control(int fd, struct v4l2_queryctrl &qctrl, int show_menus)
{
struct v4l2_control ctrl = { 0 };
struct v4l2_ext_control ext_ctrl = { 0 };
struct v4l2_ext_controls ctrls = { 0 };
if (qctrl.flags & V4L2_CTRL_FLAG_DISABLED)
return 1;
if (qctrl.type == V4L2_CTRL_TYPE_CTRL_CLASS) {
printf("\n%s\n\n", qctrl.name);
return 1;
}
ext_ctrl.id = qctrl.id;
ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(qctrl.id);
ctrls.count = 1;
ctrls.controls = &ext_ctrl;
if (V4L2_CTRL_ID2CLASS(qctrl.id) != V4L2_CTRL_CLASS_USER &&
qctrl.id < V4L2_CID_PRIVATE_BASE) {
if (ioctl(fd, VIDIOC_G_EXT_CTRLS, &ctrls)) {
printf("error %d getting ext_ctrl %s\n",
errno, qctrl.name);
return 0;
}
}
else {
ctrl.id = qctrl.id;
if (ioctl(fd, VIDIOC_G_CTRL, &ctrl)) {
printf("error %d getting ctrl %s\n",
errno, qctrl.name);
return 0;
}
ext_ctrl.value = ctrl.value;
}
print_qctrl(fd, &qctrl, &ext_ctrl, show_menus);
return 1;
}
static void deal_qctrl(struct v4l2_queryctrl *qctrl)
{
print_qctrl(qctrl);
if (qctrl_name && !strcmp(qctrl_name, qctrl->name))
set_qctrl(qctrl);
}