allocate_preview_buffer_func_t

Updated: October 26, 2022

Allocate a preview buffer

Synopsis:

#include <camera/external_camera_api.h>
typedef int(* allocate_preview_buffer_func_t)(void *handle,
            uint32_t size,
            void **vaddr);

Arguments:

handle
The handle that's returned from calling the function open_external_camera_func_t.
size
The size of the preview buffer to allocate, in bytes.
vaddr
On success, this is set to point to the address of the allocated preview buffer.

Library:

libcamapi

Description:

This function is called for a camera where the preview buffers are allocated by the external camera library. Typically, this is not the case and buffers are allocated by the Sensor service.

Note:

This function is optional. If it is not present, the camera will not support allocating preview buffers from the external camera library.

Returns:

CAMERA_EOK when the function successfully completes, otherwise another camera_error_t value that provides the reason that the call failed.