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#ifndef __UNIFIED_CAMERA_ACCESS_GRABBER_H
#define __UNIFIED_CAMERA_ACCESS_GRABBER_H
#include <stdbool.h>
/*
* --- virtual methods --------------------------------------------------------
*/
/**
* \brief Camera probing and initialization
* \return UCA_ERR_INIT_NOT_FOUND if camera is not found or could not be initialized
*/
typedef uint32_t (*uca_grabber_init) (struct uca_grabber_t **grabber);
/**
* \brief Free camera resouces
*/
typedef uint32_t (*uca_grabber_destroy) (struct uca_grabber_t *grabber);
/**
* \brief Set a property
* \param[in] property_name Name of the property as defined in XXX
* \return UCA_ERR_PROP_INVALID if property is not supported on the frame
* grabber or UCA_ERR_PROP_VALUE_OUT_OF_RANGE if value cannot be set.
*/
typedef uint32_t (*uca_grabber_set_property) (struct uca_grabber_t *grabber, enum uca_property_ids property, void *data);
/**
* \brief Set a property
* \param[in] property_name Name of the property as defined in XXX
* \return UCA_ERR_PROP_INVALID if property is not supported on the frame grabber
*/
typedef uint32_t (*uca_grabber_get_property) (struct uca_grabber_t *grabber, enum uca_property_ids property, void *data);
/**
* \brief Allocate buffers with current width, height and bitdepth
* \note Subsequent changes of width and height might corrupt memory
*/
typedef uint32_t (*uca_grabber_alloc) (struct uca_grabber_t *grabber, uint32_t n_buffers);
/**
* \brief Begin acquiring frames
* \param[in] n_frames Number of frames to acquire, -1 means infinite number
* \param[in] async Grab asynchronous if true
*/
typedef uint32_t (*uca_grabber_acquire) (struct uca_grabber_t *grabber, int32_t n_frames);
/**
* \brief Stop acquiring frames
*/
typedef uint32_t (*uca_grabber_stop_acquire) (struct uca_grabber_t *grabber);
/**
* \brief Grab a frame
*
* This method is usually called through the camera interface and not directly.
*
* \param[in] buffer The pointer of the frame buffer is set here
*/
typedef uint32_t (*uca_grabber_grab) (struct uca_grabber_t *grabber, void **buffer);
struct uca_grabber_t {
struct uca_grabber_t *next;
/* Function pointers to grabber-specific methods */
uca_grabber_destroy destroy;
uca_grabber_set_property set_property;
uca_grabber_get_property get_property;
uca_grabber_alloc alloc;
uca_grabber_acquire acquire;
uca_grabber_stop_acquire stop_acquire;
uca_grabber_grab grab;
/* Private */
bool asynchronous;
void *user;
};
#endif
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