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#ifndef IMV_SOURCE_PRIVATE_H
#define IMV_SOURCE_PRIVATE_H
struct imv_image;
struct imv_source;
/* This is the interface a source needs to implement to function correctly.
* Backends act as a "factory" for sources by calling imv_source_create
* with a pointer to a static vtable, and a pointer to that implementation's
* private data, pre-initialised.
*/
struct imv_source_vtable {
/* Loads the first frame, if successful puts output in image and duration
* (in milliseconds) in frametime. If unsuccessful, image shall be NULL. A
* still image should use a frametime of 0.
*/
void (*load_first_frame)(void *private, struct imv_image **image, int *frametime);
/* Loads the next frame, if successful puts output in image and duration
* (in milliseconds) in frametime. If unsuccessful, image shall be NULL.
*/
void (*load_next_frame)(void *private, struct imv_image **image, int *frametime);
/* Cleans up the private data of a source */
void (*free)(void *private);
};
/* Build a source given its vtable and a pointer to the private data */
struct imv_source *imv_source_create(const struct imv_source_vtable *vt, void *private);
#endif
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