Esempi in C++ (Cpp) per v4l2core_set_control_value_by_id

Esempio n. 1

File: video_capture.c Progetto: Cobra-Kao/ropon

/*
 * key RIGHT pressed callback
 * args:
 *    data - pointer to user data
 *
 * asserts:
 *    data (device) is not null
 *
 * returns: error code
 */
int key_RIGHT_callback(void *data)
{
	v4l2_dev_t *device = (v4l2_dev_t *) data;

	/*assertions*/
	assert(device != NULL);

	if(device->has_pantilt_control_id)
    {
		int id = V4L2_CID_PAN_RELATIVE;
		int value = - device->pan_step;

		v4l2_ctrl_t *control = v4l2core_get_control_by_id(device, id);

		if(control)
		{
			control->value =  value;

			if(v4l2core_set_control_value_by_id(device, id))
				fprintf(stderr, "GUVCVIEW: error setting pan/tilt value\n");

			return 0;
		}
	}

	return -1;
}

Esempio n. 2

File: video_capture.c Progetto: ChanceLuo/rubbish

/*
 * key RIGHT pressed callback
 * args:
 *    data - pointer to user data
 *
 * asserts:
 *    none
 *
 * returns: error code
 */
int key_RIGHT_callback(void *data)
{
	if(v4l2core_has_pantilt_id())
    {
		int id = V4L2_CID_PAN_RELATIVE;
		int value = - v4l2core_get_pan_step();

		v4l2_ctrl_t *control = v4l2core_get_control_by_id(id);

		if(control)
		{
			control->value =  value;

			if(v4l2core_set_control_value_by_id(id))
				fprintf(stderr, "GUVCVIEW: error setting pan/tilt value\n");

			return 0;
		}
	}

	return -1;
}