camera_enable_viewfinder_event()

Enable the viewfinder event.

Synopsis:

#include <camera/camera_api.h>
 
camera_error_t camera_enable_viewfinder_event(camera_handle_t handle,                 
                                              camera_eventmode_t eventmode,                 
                                              camera_eventkey_t *key,                 
                                              struct sigevent *event)

Since:

BlackBerry 10.0.0

Arguments:

handle

The handle returned by a call to the camera_open() function.

eventmode

The event buffering mode as a camera_eventmode_t value.

key

A pointer to a returned camera_eventkey_t value. This argument is required for subsequent function calls to identify the proper event.

event

A pointer to a struct sigevent. The struct sigevent must be initialized by the caller. This is the struct sigevent that will be delivered when a viewfinder frame is available to retrieve using camera_get_viewfinder_buffers().

Library:

libcamapi (For the qcc command, use the -l camapi option to link against this library)

Description:

Use this function to enable the viewfinder event. The viewfinder event is delivered when a viewfinder frame is available. You can then retrieve the viewfinder frame using camera_get_viewfinder_buffers(). This is the same image data that is delivered to your viewfinder_callback function registered when you started the viewfinder using camera_start_viewfinder().

Call this function when you are using the Camera API in event mode. For more information, see About event mode.

Use camera_disable_event() to disable an event when you no longer require viewfinder events to be delivered.

The viewfinder is automatically rendered to a screen window by the operating system. It is not required to provide display code unless custom output is required using some other mechanism such as OpenGL.

Returns:

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

Last modified: 2014-11-11



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