Create and open the next available file on the camera roll for writing.
camera_error_t camera_roll_open_photo(camera_handle_t handle, int *fd, char *filename, int namelen, camera_roll_photo_fmt_t fmt)
The handle returned by a call to the camera_open() function.
A pointer to the file descriptor. The pointer that is returned pointers an open photo file on the camera roll.
A pointer to returned name of the file on the camera roll. Ensure that the array pointed to by filename is at least of size CAMERA_ROLL_NAMELEN.
The size of the buffer provided by the caller as the filename. The maximum size is indicated by the value of CAMERA_ROLL_NAMELEN.
The image file format to create.
The camera roll is a directory on the device where the camera application saves files. The camera service manages unique filenames on behalf of the user. Use this function to retrieve the next available file from the camera roll. You require CAMERA_MODE_ROLL access mode when you call the camera_open() function to open the camera.
After you successfully call this function, a file is created and opened for writing. To close the file, you must call the camera_roll_close_photo() function.
CAMERA_OK when the function successfully completes, otherwise another camera_error_t value that provides the reason that the call failed.