//----------------------------------------------------------------------
uvc_error_t uvc_get_pantilt_abs(uvc_device_handle_t *devh, int *pan, int *tilt,
enum uvc_req_code req_code) {
uint8_t data[8];
uvc_error_t ret;
ret = libusb_control_transfer(devh->usb_devh, REQ_TYPE_GET, req_code,
UVC_CT_PANTILT_ABSOLUTE_CONTROL << 8,
// 1 << 8, /* = fixed ID(00) and wrong VideoControl interface descriptor subtype(UVC_VC_HEADER) on original libuvc */
devh->info->ctrl_if.input_term_descs->request,
data, sizeof(data), CTRL_TIMEOUT_MILLIS);
if (LIKELY(ret == sizeof(data))) {
*pan = DW_TO_INT(data);
*tilt = DW_TO_INT(data + 4);
return UVC_SUCCESS;
} else {
return ret;
}
}
template<class T> int get_pu(uvc_device_handle_t * devh, int subdevice, uint8_t unit, uint8_t control, int uvc_get_thing)
{
const int REQ_TYPE_GET = 0xa1;
unsigned char buffer[4];
int status = libusb_control_transfer(devh->usb_devh, REQ_TYPE_GET, uvc_get_thing, control << 8, unit << 8 | (subdevice*2), buffer, sizeof(T), 0);
if(status < 0) throw std::runtime_error(to_string() << "libusb_control_transfer(...) returned " << libusb_error_name(status));
if(status != sizeof(T)) throw std::runtime_error("insufficient data read from usb");
if(sizeof(T)==1) return buffer[0];
if(sizeof(T)==2) return SW_TO_SHORT(buffer);
if(sizeof(T)==4) return DW_TO_INT(buffer);
}
uvc_error_t uvc_get_pantilt_abs(uvc_device_handle_t *devh, int *pan, int *tilt, enum uvc_req_code req_code) {
uint8_t data[8];
uvc_error_t ret;
ret = libusb_control_transfer(
devh->usb_devh,
REQ_TYPE_GET, req_code,
UVC_CT_PANTILT_ABSOLUTE_CONTROL << 8,
1 << 8,
data,
sizeof(data),
0);
if (ret == sizeof(data)) {
*pan = DW_TO_INT(data);
*tilt = DW_TO_INT(data + 4);
return UVC_SUCCESS;
} else {
return ret;
}
}
uvc_error_t uvc_get_wb_compo(uvc_device_handle_t *devh, uint32_t *wb_compo,
enum uvc_req_code req_code) {
uint8_t data[4];
uvc_error_t ret;
ret = libusb_control_transfer(devh->usb_devh, REQ_TYPE_GET, req_code,
UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL << 8,
devh->info->ctrl_if.processing_unit_descs->request,
data, sizeof(data), CTRL_TIMEOUT_MILLIS);
if (LIKELY(ret == sizeof(data))) {
*wb_compo = DW_TO_INT(data);
return UVC_SUCCESS;
} else {
return ret;
}
RETURN(-1, uvc_error_t);
}
uvc_error_t uvc_get_exposure_abs(uvc_device_handle_t *devh, int *time, enum uvc_req_code req_code) {
uint8_t data[4];
uvc_error_t ret;
ret = libusb_control_transfer(
devh->usb_devh,
REQ_TYPE_GET, req_code,
UVC_CT_EXPOSURE_TIME_ABSOLUTE_CONTROL << 8,
1 << 8,
data,
sizeof(data),
0);
if (ret == sizeof(data)) {
*time = DW_TO_INT(data);
return UVC_SUCCESS;
} else {
return ret;
}
}
