Definitions in camera_api.h

Definitions:

#define CAMERA_API_VERSION 2

The version of the Camera library.

The version is used for IPC handshaking and communication between the application and camera service. You can compare CAMERA_API_VERSION with the value returned by the camera_get_api_version() function to determine if the runtime library is different from the version your application was compiled with. Differences may indicate potential incompatibilities.

#define CAMERA_HANDLE_INVALID (-1)

A safe-initializer value for camera_handle_t values.

Use this value to check that correct initialization occurred and whether a call to the camera_open() function was successful. A camera handle should be set to this value during initialization or when the handle is closed.

#define CAMERA_ROLL_NAMELEN (256)

The maximum length of a filename returned by camera-roll functions.

The value is useful for you to determine the largest char* buffer to allocate. The camera roll is a directory where photo and video files can be saved.

#define CAMERA_MAX_FRAMEDESC_SIZE (256)

The maximum size, in bytes, of the frame descriptor.