WVR_GetMarkerObserverState¶

WVR_EXPORT WVR_Result WVR_GetMarkerObserverState(WVR_MarkerObserverTarget target, WVR_MarkerObserverState * state)

Function is used to get the corresponding marker observer target state.

Developers can inspect the marker observer state by polling WVR_GetMarkerObserverState. Check state (refer to WVR_MarkerObserverState) to know the current status.

Version

API Level 13

Parameters

target: input marker observer target , refer to WVR_MarkerObserverTarget
state: the returned WVR_MarkerObserverState value

Return Value

WVR_Success: Get marker observer state successfully.
others: WVR_Result mean failure.

How to use¶

Sample function:

#include <wvr/wvr_marker.h>

if (WVR_StartMarker() == WVR_Success) {
    // start marker observer
    if (WVR_StartMarkerObserver(WVR_MarkerObserverTarget_Aruco) == WVR_Success) {
        // Start Aruco marker observer related resources success

        auto checkPassed = false;
        WVR_MarkerObserverState state;
        while(!checkPassed) {
            if (WAVE_SUCCEEDED(WVR_GetMarkerObserverState(WVR_MarkerObserverTarget_Aruco, &state)) == false) {
                LOGE("%s(%d) WVR_GetMarkerObserverState with WVR_MarkerObserverTarget_Aruco failed", __FUNCTION__, __LINE__);
            } else {
            if (state == WVR_MarkerObserverState_Idle) {
                LOGI("%s(%d) WVR_GetMarkerObserverState with WVR_MarkerObserverTarget_Aruco checkPassed = true", __FUNCTION__, __LINE__);
                checkPassed = true;
            } else {
                LOGI("%s(%d) WVR_GetMarkerObserverState with WVR_MarkerObserverTarget_Aruco checkPassed = false", __FUNCTION__, __LINE__);
            }
        }

        // release Aruco marker observer related resources success
        if (WVR_StopMarkerObserver(WVR_MarkerObserverTarget_Aruco) == WVR_Success) {

        }
    }

    WVR_StopMarker();
} else {
    // start marker failed!
}