thirdparty/libuvc-0.0.6/src/ctrl-gen.c

/* This is an AUTO-GENERATED file! Update it with the output of `ctrl-gen.py def`. */
#include "libuvc/libuvc.h"
#include "libuvc/libuvc_internal.h"

static const int REQ_TYPE_SET = 0x21;
static const int REQ_TYPE_GET = 0xa1;

/** @ingroup ctrl
 * @brief Reads the SCANNING_MODE control.
 * @param devh UVC device handle
 * @param[out] mode 0: interlaced, 1: progressive
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_scanning_mode(uvc_device_handle_t *devh, uint8_t* mode, enum uvc_req_code req_code) {
  uint8_t data[1];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_CT_SCANNING_MODE_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *mode = data[0];
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the SCANNING_MODE control.
 * @param devh UVC device handle
 * @param mode 0: interlaced, 1: progressive
 */
uvc_error_t uvc_set_scanning_mode(uvc_device_handle_t *devh, uint8_t mode) {
  uint8_t data[1];
  uvc_error_t ret;

  data[0] = mode;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_CT_SCANNING_MODE_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads camera's auto-exposure mode.
 * 
 * See uvc_set_ae_mode() for a description of the available modes.
 * @param devh UVC device handle
 * @param[out] mode 1: manual mode; 2: auto mode; 4: shutter priority mode; 8: aperture priority mode
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_ae_mode(uvc_device_handle_t *devh, uint8_t* mode, enum uvc_req_code req_code) {
  uint8_t data[1];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_CT_AE_MODE_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *mode = data[0];
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets camera's auto-exposure mode.
 * 
 * Cameras may support any of the following AE modes:
 *  * UVC_AUTO_EXPOSURE_MODE_MANUAL (1) - manual exposure time, manual iris
 *  * UVC_AUTO_EXPOSURE_MODE_AUTO (2) - auto exposure time, auto iris
 *  * UVC_AUTO_EXPOSURE_MODE_SHUTTER_PRIORITY (4) - manual exposure time, auto iris
 *  * UVC_AUTO_EXPOSURE_MODE_APERTURE_PRIORITY (8) - auto exposure time, manual iris
 * 
 * Most cameras provide manual mode and aperture priority mode.
 * @param devh UVC device handle
 * @param mode 1: manual mode; 2: auto mode; 4: shutter priority mode; 8: aperture priority mode
 */
uvc_error_t uvc_set_ae_mode(uvc_device_handle_t *devh, uint8_t mode) {
  uint8_t data[1];
  uvc_error_t ret;

  data[0] = mode;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_CT_AE_MODE_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Checks whether the camera may vary the frame rate for exposure control reasons.
 * See uvc_set_ae_priority() for a description of the `priority` field.
 * @param devh UVC device handle
 * @param[out] priority 0: frame rate must remain constant; 1: frame rate may be varied for AE purposes
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_ae_priority(uvc_device_handle_t *devh, uint8_t* priority, enum uvc_req_code req_code) {
  uint8_t data[1];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_CT_AE_PRIORITY_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *priority = data[0];
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Chooses whether the camera may vary the frame rate for exposure control reasons.
 * A `priority` value of zero means the camera may not vary its frame rate. A value of 1
 * means the frame rate is variable. This setting has no effect outside of the `auto` and
 * `shutter_priority` auto-exposure modes.
 * @param devh UVC device handle
 * @param priority 0: frame rate must remain constant; 1: frame rate may be varied for AE purposes
 */
uvc_error_t uvc_set_ae_priority(uvc_device_handle_t *devh, uint8_t priority) {
  uint8_t data[1];
  uvc_error_t ret;

  data[0] = priority;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_CT_AE_PRIORITY_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Gets the absolute exposure time.
 * 
 * See uvc_set_exposure_abs() for a description of the `time` field.
 * @param devh UVC device handle
 * @param[out] time 
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_exposure_abs(uvc_device_handle_t *devh, uint32_t* 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,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *time = DW_TO_INT(data + 0);
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the absolute exposure time.
 * 
 * The `time` parameter should be provided in units of 0.0001 seconds (e.g., use the value 100
 * for a 10ms exposure period). Auto exposure should be set to `manual` or `shutter_priority`
 * before attempting to change this setting.
 * @param devh UVC device handle
 * @param time 
 */
uvc_error_t uvc_set_exposure_abs(uvc_device_handle_t *devh, uint32_t time) {
  uint8_t data[4];
  uvc_error_t ret;

  INT_TO_DW(time, data + 0);

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_CT_EXPOSURE_TIME_ABSOLUTE_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the exposure time relative to the current setting.
 * @param devh UVC device handle
 * @param[out] step number of steps by which to change the exposure time, or zero to set the default exposure time
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_exposure_rel(uvc_device_handle_t *devh, int8_t* step, enum uvc_req_code req_code) {
  uint8_t data[1];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_CT_EXPOSURE_TIME_RELATIVE_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *step = data[0];
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the exposure time relative to the current setting.
 * @param devh UVC device handle
 * @param step number of steps by which to change the exposure time, or zero to set the default exposure time
 */
uvc_error_t uvc_set_exposure_rel(uvc_device_handle_t *devh, int8_t step) {
  uint8_t data[1];
  uvc_error_t ret;

  data[0] = step;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_CT_EXPOSURE_TIME_RELATIVE_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the distance at which an object is optimally focused.
 * @param devh UVC device handle
 * @param[out] focus focal target distance in millimeters
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_focus_abs(uvc_device_handle_t *devh, uint16_t* focus, enum uvc_req_code req_code) {
  uint8_t data[2];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_CT_FOCUS_ABSOLUTE_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *focus = SW_TO_SHORT(data + 0);
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the distance at which an object is optimally focused.
 * @param devh UVC device handle
 * @param focus focal target distance in millimeters
 */
uvc_error_t uvc_set_focus_abs(uvc_device_handle_t *devh, uint16_t focus) {
  uint8_t data[2];
  uvc_error_t ret;

  SHORT_TO_SW(focus, data + 0);

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_CT_FOCUS_ABSOLUTE_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the FOCUS_RELATIVE control.
 * @param devh UVC device handle
 * @param[out] focus_rel TODO
 * @param[out] speed TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_focus_rel(uvc_device_handle_t *devh, int8_t* focus_rel, uint8_t* speed, enum uvc_req_code req_code) {
  uint8_t data[2];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_CT_FOCUS_RELATIVE_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *focus_rel = data[0];
    *speed = data[1];
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the FOCUS_RELATIVE control.
 * @param devh UVC device handle
 * @param focus_rel TODO
 * @param speed TODO
 */
uvc_error_t uvc_set_focus_rel(uvc_device_handle_t *devh, int8_t focus_rel, uint8_t speed) {
  uint8_t data[2];
  uvc_error_t ret;

  data[0] = focus_rel;
  data[1] = speed;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_CT_FOCUS_RELATIVE_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the FOCUS_SIMPLE control.
 * @param devh UVC device handle
 * @param[out] focus TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_focus_simple_range(uvc_device_handle_t *devh, uint8_t* focus, enum uvc_req_code req_code) {
  uint8_t data[1];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_CT_FOCUS_SIMPLE_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *focus = data[0];
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the FOCUS_SIMPLE control.
 * @param devh UVC device handle
 * @param focus TODO
 */
uvc_error_t uvc_set_focus_simple_range(uvc_device_handle_t *devh, uint8_t focus) {
  uint8_t data[1];
  uvc_error_t ret;

  data[0] = focus;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_CT_FOCUS_SIMPLE_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the FOCUS_AUTO control.
 * @param devh UVC device handle
 * @param[out] state TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_focus_auto(uvc_device_handle_t *devh, uint8_t* state, enum uvc_req_code req_code) {
  uint8_t data[1];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_CT_FOCUS_AUTO_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *state = data[0];
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the FOCUS_AUTO control.
 * @param devh UVC device handle
 * @param state TODO
 */
uvc_error_t uvc_set_focus_auto(uvc_device_handle_t *devh, uint8_t state) {
  uint8_t data[1];
  uvc_error_t ret;

  data[0] = state;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_CT_FOCUS_AUTO_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the IRIS_ABSOLUTE control.
 * @param devh UVC device handle
 * @param[out] iris TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_iris_abs(uvc_device_handle_t *devh, uint16_t* iris, enum uvc_req_code req_code) {
  uint8_t data[2];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_CT_IRIS_ABSOLUTE_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *iris = SW_TO_SHORT(data + 0);
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the IRIS_ABSOLUTE control.
 * @param devh UVC device handle
 * @param iris TODO
 */
uvc_error_t uvc_set_iris_abs(uvc_device_handle_t *devh, uint16_t iris) {
  uint8_t data[2];
  uvc_error_t ret;

  SHORT_TO_SW(iris, data + 0);

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_CT_IRIS_ABSOLUTE_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the IRIS_RELATIVE control.
 * @param devh UVC device handle
 * @param[out] iris_rel TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_iris_rel(uvc_device_handle_t *devh, uint8_t* iris_rel, enum uvc_req_code req_code) {
  uint8_t data[1];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_CT_IRIS_RELATIVE_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *iris_rel = data[0];
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the IRIS_RELATIVE control.
 * @param devh UVC device handle
 * @param iris_rel TODO
 */
uvc_error_t uvc_set_iris_rel(uvc_device_handle_t *devh, uint8_t iris_rel) {
  uint8_t data[1];
  uvc_error_t ret;

  data[0] = iris_rel;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_CT_IRIS_RELATIVE_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the ZOOM_ABSOLUTE control.
 * @param devh UVC device handle
 * @param[out] focal_length TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_zoom_abs(uvc_device_handle_t *devh, uint16_t* focal_length, enum uvc_req_code req_code) {
  uint8_t data[2];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_CT_ZOOM_ABSOLUTE_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *focal_length = SW_TO_SHORT(data + 0);
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the ZOOM_ABSOLUTE control.
 * @param devh UVC device handle
 * @param focal_length TODO
 */
uvc_error_t uvc_set_zoom_abs(uvc_device_handle_t *devh, uint16_t focal_length) {
  uint8_t data[2];
  uvc_error_t ret;

  SHORT_TO_SW(focal_length, data + 0);

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_CT_ZOOM_ABSOLUTE_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the ZOOM_RELATIVE control.
 * @param devh UVC device handle
 * @param[out] zoom_rel TODO
 * @param[out] digital_zoom TODO
 * @param[out] speed TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_zoom_rel(uvc_device_handle_t *devh, int8_t* zoom_rel, uint8_t* digital_zoom, uint8_t* speed, enum uvc_req_code req_code) {
  uint8_t data[3];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_CT_ZOOM_RELATIVE_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *zoom_rel = data[0];
    *digital_zoom = data[1];
    *speed = data[2];
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the ZOOM_RELATIVE control.
 * @param devh UVC device handle
 * @param zoom_rel TODO
 * @param digital_zoom TODO
 * @param speed TODO
 */
uvc_error_t uvc_set_zoom_rel(uvc_device_handle_t *devh, int8_t zoom_rel, uint8_t digital_zoom, uint8_t speed) {
  uint8_t data[3];
  uvc_error_t ret;

  data[0] = zoom_rel;
  data[1] = digital_zoom;
  data[2] = speed;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_CT_ZOOM_RELATIVE_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the PANTILT_ABSOLUTE control.
 * @param devh UVC device handle
 * @param[out] pan TODO
 * @param[out] tilt TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_pantilt_abs(uvc_device_handle_t *devh, int32_t* pan, int32_t* 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,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *pan = DW_TO_INT(data + 0);
    *tilt = DW_TO_INT(data + 4);
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the PANTILT_ABSOLUTE control.
 * @param devh UVC device handle
 * @param pan TODO
 * @param tilt TODO
 */
uvc_error_t uvc_set_pantilt_abs(uvc_device_handle_t *devh, int32_t pan, int32_t tilt) {
  uint8_t data[8];
  uvc_error_t ret;

  INT_TO_DW(pan, data + 0);
  INT_TO_DW(tilt, data + 4);

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_CT_PANTILT_ABSOLUTE_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the PANTILT_RELATIVE control.
 * @param devh UVC device handle
 * @param[out] pan_rel TODO
 * @param[out] pan_speed TODO
 * @param[out] tilt_rel TODO
 * @param[out] tilt_speed TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_pantilt_rel(uvc_device_handle_t *devh, int8_t* pan_rel, uint8_t* pan_speed, int8_t* tilt_rel, uint8_t* tilt_speed, 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_PANTILT_RELATIVE_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *pan_rel = data[0];
    *pan_speed = data[1];
    *tilt_rel = data[2];
    *tilt_speed = data[3];
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the PANTILT_RELATIVE control.
 * @param devh UVC device handle
 * @param pan_rel TODO
 * @param pan_speed TODO
 * @param tilt_rel TODO
 * @param tilt_speed TODO
 */
uvc_error_t uvc_set_pantilt_rel(uvc_device_handle_t *devh, int8_t pan_rel, uint8_t pan_speed, int8_t tilt_rel, uint8_t tilt_speed) {
  uint8_t data[4];
  uvc_error_t ret;

  data[0] = pan_rel;
  data[1] = pan_speed;
  data[2] = tilt_rel;
  data[3] = tilt_speed;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_CT_PANTILT_RELATIVE_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the ROLL_ABSOLUTE control.
 * @param devh UVC device handle
 * @param[out] roll TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_roll_abs(uvc_device_handle_t *devh, int16_t* roll, enum uvc_req_code req_code) {
  uint8_t data[2];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_CT_ROLL_ABSOLUTE_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *roll = SW_TO_SHORT(data + 0);
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the ROLL_ABSOLUTE control.
 * @param devh UVC device handle
 * @param roll TODO
 */
uvc_error_t uvc_set_roll_abs(uvc_device_handle_t *devh, int16_t roll) {
  uint8_t data[2];
  uvc_error_t ret;

  SHORT_TO_SW(roll, data + 0);

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_CT_ROLL_ABSOLUTE_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the ROLL_RELATIVE control.
 * @param devh UVC device handle
 * @param[out] roll_rel TODO
 * @param[out] speed TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_roll_rel(uvc_device_handle_t *devh, int8_t* roll_rel, uint8_t* speed, enum uvc_req_code req_code) {
  uint8_t data[2];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_CT_ROLL_RELATIVE_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *roll_rel = data[0];
    *speed = data[1];
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the ROLL_RELATIVE control.
 * @param devh UVC device handle
 * @param roll_rel TODO
 * @param speed TODO
 */
uvc_error_t uvc_set_roll_rel(uvc_device_handle_t *devh, int8_t roll_rel, uint8_t speed) {
  uint8_t data[2];
  uvc_error_t ret;

  data[0] = roll_rel;
  data[1] = speed;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_CT_ROLL_RELATIVE_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the PRIVACY control.
 * @param devh UVC device handle
 * @param[out] privacy TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_privacy(uvc_device_handle_t *devh, uint8_t* privacy, enum uvc_req_code req_code) {
  uint8_t data[1];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_CT_PRIVACY_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *privacy = data[0];
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the PRIVACY control.
 * @param devh UVC device handle
 * @param privacy TODO
 */
uvc_error_t uvc_set_privacy(uvc_device_handle_t *devh, uint8_t privacy) {
  uint8_t data[1];
  uvc_error_t ret;

  data[0] = privacy;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_CT_PRIVACY_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the DIGITAL_WINDOW control.
 * @param devh UVC device handle
 * @param[out] window_top TODO
 * @param[out] window_left TODO
 * @param[out] window_bottom TODO
 * @param[out] window_right TODO
 * @param[out] num_steps TODO
 * @param[out] num_steps_units TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_digital_window(uvc_device_handle_t *devh, uint16_t* window_top, uint16_t* window_left, uint16_t* window_bottom, uint16_t* window_right, uint16_t* num_steps, uint16_t* num_steps_units, enum uvc_req_code req_code) {
  uint8_t data[12];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_CT_DIGITAL_WINDOW_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *window_top = SW_TO_SHORT(data + 0);
    *window_left = SW_TO_SHORT(data + 2);
    *window_bottom = SW_TO_SHORT(data + 4);
    *window_right = SW_TO_SHORT(data + 6);
    *num_steps = SW_TO_SHORT(data + 8);
    *num_steps_units = SW_TO_SHORT(data + 10);
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the DIGITAL_WINDOW control.
 * @param devh UVC device handle
 * @param window_top TODO
 * @param window_left TODO
 * @param window_bottom TODO
 * @param window_right TODO
 * @param num_steps TODO
 * @param num_steps_units TODO
 */
uvc_error_t uvc_set_digital_window(uvc_device_handle_t *devh, uint16_t window_top, uint16_t window_left, uint16_t window_bottom, uint16_t window_right, uint16_t num_steps, uint16_t num_steps_units) {
  uint8_t data[12];
  uvc_error_t ret;

  SHORT_TO_SW(window_top, data + 0);
  SHORT_TO_SW(window_left, data + 2);
  SHORT_TO_SW(window_bottom, data + 4);
  SHORT_TO_SW(window_right, data + 6);
  SHORT_TO_SW(num_steps, data + 8);
  SHORT_TO_SW(num_steps_units, data + 10);

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_CT_DIGITAL_WINDOW_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the REGION_OF_INTEREST control.
 * @param devh UVC device handle
 * @param[out] roi_top TODO
 * @param[out] roi_left TODO
 * @param[out] roi_bottom TODO
 * @param[out] roi_right TODO
 * @param[out] auto_controls TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_digital_roi(uvc_device_handle_t *devh, uint16_t* roi_top, uint16_t* roi_left, uint16_t* roi_bottom, uint16_t* roi_right, uint16_t* auto_controls, enum uvc_req_code req_code) {
  uint8_t data[10];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_CT_REGION_OF_INTEREST_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *roi_top = SW_TO_SHORT(data + 0);
    *roi_left = SW_TO_SHORT(data + 2);
    *roi_bottom = SW_TO_SHORT(data + 4);
    *roi_right = SW_TO_SHORT(data + 6);
    *auto_controls = SW_TO_SHORT(data + 8);
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the REGION_OF_INTEREST control.
 * @param devh UVC device handle
 * @param roi_top TODO
 * @param roi_left TODO
 * @param roi_bottom TODO
 * @param roi_right TODO
 * @param auto_controls TODO
 */
uvc_error_t uvc_set_digital_roi(uvc_device_handle_t *devh, uint16_t roi_top, uint16_t roi_left, uint16_t roi_bottom, uint16_t roi_right, uint16_t auto_controls) {
  uint8_t data[10];
  uvc_error_t ret;

  SHORT_TO_SW(roi_top, data + 0);
  SHORT_TO_SW(roi_left, data + 2);
  SHORT_TO_SW(roi_bottom, data + 4);
  SHORT_TO_SW(roi_right, data + 6);
  SHORT_TO_SW(auto_controls, data + 8);

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_CT_REGION_OF_INTEREST_CONTROL << 8,
    uvc_get_camera_terminal(devh)->bTerminalID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the BACKLIGHT_COMPENSATION control.
 * @param devh UVC device handle
 * @param[out] backlight_compensation device-dependent backlight compensation mode; zero means backlight compensation is disabled
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_backlight_compensation(uvc_device_handle_t *devh, uint16_t* backlight_compensation, enum uvc_req_code req_code) {
  uint8_t data[2];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_PU_BACKLIGHT_COMPENSATION_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *backlight_compensation = SW_TO_SHORT(data + 0);
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the BACKLIGHT_COMPENSATION control.
 * @param devh UVC device handle
 * @param backlight_compensation device-dependent backlight compensation mode; zero means backlight compensation is disabled
 */
uvc_error_t uvc_set_backlight_compensation(uvc_device_handle_t *devh, uint16_t backlight_compensation) {
  uint8_t data[2];
  uvc_error_t ret;

  SHORT_TO_SW(backlight_compensation, data + 0);

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_PU_BACKLIGHT_COMPENSATION_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the BRIGHTNESS control.
 * @param devh UVC device handle
 * @param[out] brightness TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_brightness(uvc_device_handle_t *devh, int16_t* brightness, enum uvc_req_code req_code) {
  uint8_t data[2];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_PU_BRIGHTNESS_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *brightness = SW_TO_SHORT(data + 0);
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the BRIGHTNESS control.
 * @param devh UVC device handle
 * @param brightness TODO
 */
uvc_error_t uvc_set_brightness(uvc_device_handle_t *devh, int16_t brightness) {
  uint8_t data[2];
  uvc_error_t ret;

  SHORT_TO_SW(brightness, data + 0);

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_PU_BRIGHTNESS_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the CONTRAST control.
 * @param devh UVC device handle
 * @param[out] contrast TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_contrast(uvc_device_handle_t *devh, uint16_t* contrast, enum uvc_req_code req_code) {
  uint8_t data[2];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_PU_CONTRAST_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *contrast = SW_TO_SHORT(data + 0);
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the CONTRAST control.
 * @param devh UVC device handle
 * @param contrast TODO
 */
uvc_error_t uvc_set_contrast(uvc_device_handle_t *devh, uint16_t contrast) {
  uint8_t data[2];
  uvc_error_t ret;

  SHORT_TO_SW(contrast, data + 0);

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_PU_CONTRAST_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the CONTRAST_AUTO control.
 * @param devh UVC device handle
 * @param[out] contrast_auto TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_contrast_auto(uvc_device_handle_t *devh, uint8_t* contrast_auto, enum uvc_req_code req_code) {
  uint8_t data[1];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_PU_CONTRAST_AUTO_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *contrast_auto = data[0];
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the CONTRAST_AUTO control.
 * @param devh UVC device handle
 * @param contrast_auto TODO
 */
uvc_error_t uvc_set_contrast_auto(uvc_device_handle_t *devh, uint8_t contrast_auto) {
  uint8_t data[1];
  uvc_error_t ret;

  data[0] = contrast_auto;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_PU_CONTRAST_AUTO_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the GAIN control.
 * @param devh UVC device handle
 * @param[out] gain TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_gain(uvc_device_handle_t *devh, uint16_t* gain, enum uvc_req_code req_code) {
  uint8_t data[2];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_PU_GAIN_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *gain = SW_TO_SHORT(data + 0);
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the GAIN control.
 * @param devh UVC device handle
 * @param gain TODO
 */
uvc_error_t uvc_set_gain(uvc_device_handle_t *devh, uint16_t gain) {
  uint8_t data[2];
  uvc_error_t ret;

  SHORT_TO_SW(gain, data + 0);

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_PU_GAIN_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the POWER_LINE_FREQUENCY control.
 * @param devh UVC device handle
 * @param[out] power_line_frequency TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_power_line_frequency(uvc_device_handle_t *devh, uint8_t* power_line_frequency, enum uvc_req_code req_code) {
  uint8_t data[1];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_PU_POWER_LINE_FREQUENCY_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *power_line_frequency = data[0];
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the POWER_LINE_FREQUENCY control.
 * @param devh UVC device handle
 * @param power_line_frequency TODO
 */
uvc_error_t uvc_set_power_line_frequency(uvc_device_handle_t *devh, uint8_t power_line_frequency) {
  uint8_t data[1];
  uvc_error_t ret;

  data[0] = power_line_frequency;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_PU_POWER_LINE_FREQUENCY_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the HUE control.
 * @param devh UVC device handle
 * @param[out] hue TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_hue(uvc_device_handle_t *devh, int16_t* hue, enum uvc_req_code req_code) {
  uint8_t data[2];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_PU_HUE_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *hue = SW_TO_SHORT(data + 0);
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the HUE control.
 * @param devh UVC device handle
 * @param hue TODO
 */
uvc_error_t uvc_set_hue(uvc_device_handle_t *devh, int16_t hue) {
  uint8_t data[2];
  uvc_error_t ret;

  SHORT_TO_SW(hue, data + 0);

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_PU_HUE_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the HUE_AUTO control.
 * @param devh UVC device handle
 * @param[out] hue_auto TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_hue_auto(uvc_device_handle_t *devh, uint8_t* hue_auto, enum uvc_req_code req_code) {
  uint8_t data[1];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_PU_HUE_AUTO_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *hue_auto = data[0];
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the HUE_AUTO control.
 * @param devh UVC device handle
 * @param hue_auto TODO
 */
uvc_error_t uvc_set_hue_auto(uvc_device_handle_t *devh, uint8_t hue_auto) {
  uint8_t data[1];
  uvc_error_t ret;

  data[0] = hue_auto;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_PU_HUE_AUTO_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the SATURATION control.
 * @param devh UVC device handle
 * @param[out] saturation TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_saturation(uvc_device_handle_t *devh, uint16_t* saturation, enum uvc_req_code req_code) {
  uint8_t data[2];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_PU_SATURATION_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *saturation = SW_TO_SHORT(data + 0);
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the SATURATION control.
 * @param devh UVC device handle
 * @param saturation TODO
 */
uvc_error_t uvc_set_saturation(uvc_device_handle_t *devh, uint16_t saturation) {
  uint8_t data[2];
  uvc_error_t ret;

  SHORT_TO_SW(saturation, data + 0);

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_PU_SATURATION_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the SHARPNESS control.
 * @param devh UVC device handle
 * @param[out] sharpness TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_sharpness(uvc_device_handle_t *devh, uint16_t* sharpness, enum uvc_req_code req_code) {
  uint8_t data[2];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_PU_SHARPNESS_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *sharpness = SW_TO_SHORT(data + 0);
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the SHARPNESS control.
 * @param devh UVC device handle
 * @param sharpness TODO
 */
uvc_error_t uvc_set_sharpness(uvc_device_handle_t *devh, uint16_t sharpness) {
  uint8_t data[2];
  uvc_error_t ret;

  SHORT_TO_SW(sharpness, data + 0);

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_PU_SHARPNESS_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the GAMMA control.
 * @param devh UVC device handle
 * @param[out] gamma TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_gamma(uvc_device_handle_t *devh, uint16_t* gamma, enum uvc_req_code req_code) {
  uint8_t data[2];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_PU_GAMMA_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *gamma = SW_TO_SHORT(data + 0);
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the GAMMA control.
 * @param devh UVC device handle
 * @param gamma TODO
 */
uvc_error_t uvc_set_gamma(uvc_device_handle_t *devh, uint16_t gamma) {
  uint8_t data[2];
  uvc_error_t ret;

  SHORT_TO_SW(gamma, data + 0);

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_PU_GAMMA_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the WHITE_BALANCE_TEMPERATURE control.
 * @param devh UVC device handle
 * @param[out] temperature TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_white_balance_temperature(uvc_device_handle_t *devh, uint16_t* temperature, enum uvc_req_code req_code) {
  uint8_t data[2];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_PU_WHITE_BALANCE_TEMPERATURE_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *temperature = SW_TO_SHORT(data + 0);
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the WHITE_BALANCE_TEMPERATURE control.
 * @param devh UVC device handle
 * @param temperature TODO
 */
uvc_error_t uvc_set_white_balance_temperature(uvc_device_handle_t *devh, uint16_t temperature) {
  uint8_t data[2];
  uvc_error_t ret;

  SHORT_TO_SW(temperature, data + 0);

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_PU_WHITE_BALANCE_TEMPERATURE_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the WHITE_BALANCE_TEMPERATURE_AUTO control.
 * @param devh UVC device handle
 * @param[out] temperature_auto TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_white_balance_temperature_auto(uvc_device_handle_t *devh, uint8_t* temperature_auto, enum uvc_req_code req_code) {
  uint8_t data[1];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *temperature_auto = data[0];
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the WHITE_BALANCE_TEMPERATURE_AUTO control.
 * @param devh UVC device handle
 * @param temperature_auto TODO
 */
uvc_error_t uvc_set_white_balance_temperature_auto(uvc_device_handle_t *devh, uint8_t temperature_auto) {
  uint8_t data[1];
  uvc_error_t ret;

  data[0] = temperature_auto;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the WHITE_BALANCE_COMPONENT control.
 * @param devh UVC device handle
 * @param[out] blue TODO
 * @param[out] red TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_white_balance_component(uvc_device_handle_t *devh, uint16_t* blue, uint16_t* red, 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,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *blue = SW_TO_SHORT(data + 0);
    *red = SW_TO_SHORT(data + 2);
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the WHITE_BALANCE_COMPONENT control.
 * @param devh UVC device handle
 * @param blue TODO
 * @param red TODO
 */
uvc_error_t uvc_set_white_balance_component(uvc_device_handle_t *devh, uint16_t blue, uint16_t red) {
  uint8_t data[4];
  uvc_error_t ret;

  SHORT_TO_SW(blue, data + 0);
  SHORT_TO_SW(red, data + 2);

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the WHITE_BALANCE_COMPONENT_AUTO control.
 * @param devh UVC device handle
 * @param[out] white_balance_component_auto TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_white_balance_component_auto(uvc_device_handle_t *devh, uint8_t* white_balance_component_auto, enum uvc_req_code req_code) {
  uint8_t data[1];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *white_balance_component_auto = data[0];
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the WHITE_BALANCE_COMPONENT_AUTO control.
 * @param devh UVC device handle
 * @param white_balance_component_auto TODO
 */
uvc_error_t uvc_set_white_balance_component_auto(uvc_device_handle_t *devh, uint8_t white_balance_component_auto) {
  uint8_t data[1];
  uvc_error_t ret;

  data[0] = white_balance_component_auto;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the DIGITAL_MULTIPLIER control.
 * @param devh UVC device handle
 * @param[out] multiplier_step TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_digital_multiplier(uvc_device_handle_t *devh, uint16_t* multiplier_step, enum uvc_req_code req_code) {
  uint8_t data[2];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_PU_DIGITAL_MULTIPLIER_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *multiplier_step = SW_TO_SHORT(data + 0);
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the DIGITAL_MULTIPLIER control.
 * @param devh UVC device handle
 * @param multiplier_step TODO
 */
uvc_error_t uvc_set_digital_multiplier(uvc_device_handle_t *devh, uint16_t multiplier_step) {
  uint8_t data[2];
  uvc_error_t ret;

  SHORT_TO_SW(multiplier_step, data + 0);

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_PU_DIGITAL_MULTIPLIER_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the DIGITAL_MULTIPLIER_LIMIT control.
 * @param devh UVC device handle
 * @param[out] multiplier_step TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_digital_multiplier_limit(uvc_device_handle_t *devh, uint16_t* multiplier_step, enum uvc_req_code req_code) {
  uint8_t data[2];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_PU_DIGITAL_MULTIPLIER_LIMIT_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *multiplier_step = SW_TO_SHORT(data + 0);
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the DIGITAL_MULTIPLIER_LIMIT control.
 * @param devh UVC device handle
 * @param multiplier_step TODO
 */
uvc_error_t uvc_set_digital_multiplier_limit(uvc_device_handle_t *devh, uint16_t multiplier_step) {
  uint8_t data[2];
  uvc_error_t ret;

  SHORT_TO_SW(multiplier_step, data + 0);

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_PU_DIGITAL_MULTIPLIER_LIMIT_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the ANALOG_VIDEO_STANDARD control.
 * @param devh UVC device handle
 * @param[out] video_standard TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_analog_video_standard(uvc_device_handle_t *devh, uint8_t* video_standard, enum uvc_req_code req_code) {
  uint8_t data[1];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_PU_ANALOG_VIDEO_STANDARD_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *video_standard = data[0];
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the ANALOG_VIDEO_STANDARD control.
 * @param devh UVC device handle
 * @param video_standard TODO
 */
uvc_error_t uvc_set_analog_video_standard(uvc_device_handle_t *devh, uint8_t video_standard) {
  uint8_t data[1];
  uvc_error_t ret;

  data[0] = video_standard;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_PU_ANALOG_VIDEO_STANDARD_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the ANALOG_LOCK_STATUS control.
 * @param devh UVC device handle
 * @param[out] status TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_analog_video_lock_status(uvc_device_handle_t *devh, uint8_t* status, enum uvc_req_code req_code) {
  uint8_t data[1];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_PU_ANALOG_LOCK_STATUS_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *status = data[0];
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the ANALOG_LOCK_STATUS control.
 * @param devh UVC device handle
 * @param status TODO
 */
uvc_error_t uvc_set_analog_video_lock_status(uvc_device_handle_t *devh, uint8_t status) {
  uint8_t data[1];
  uvc_error_t ret;

  data[0] = status;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_PU_ANALOG_LOCK_STATUS_CONTROL << 8,
    uvc_get_processing_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}

/** @ingroup ctrl
 * @brief Reads the INPUT_SELECT control.
 * @param devh UVC device handle
 * @param[out] selector TODO
 * @param req_code UVC_GET_* request to execute
 */
uvc_error_t uvc_get_input_select(uvc_device_handle_t *devh, uint8_t* selector, enum uvc_req_code req_code) {
  uint8_t data[1];
  uvc_error_t ret;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_GET, req_code,
    UVC_SU_INPUT_SELECT_CONTROL << 8,
    uvc_get_selector_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data)) {
    *selector = data[0];
    return UVC_SUCCESS;
  } else {
    return ret;
  }
}


/** @ingroup ctrl
 * @brief Sets the INPUT_SELECT control.
 * @param devh UVC device handle
 * @param selector TODO
 */
uvc_error_t uvc_set_input_select(uvc_device_handle_t *devh, uint8_t selector) {
  uint8_t data[1];
  uvc_error_t ret;

  data[0] = selector;

  ret = libusb_control_transfer(
    devh->usb_devh,
    REQ_TYPE_SET, UVC_SET_CUR,
    UVC_SU_INPUT_SELECT_CONTROL << 8,
    uvc_get_selector_units(devh)->bUnitID << 8 | devh->info->ctrl_if.bInterfaceNumber,
    data,
    sizeof(data),
    0);

  if (ret == sizeof(data))
    return UVC_SUCCESS;
  else
    return ret;
}