尝试锁定对焦一次

app/src/main/cpp/camera2/ndkcamera.cpp

@@ -1271,12 +1271,18 @@ void NdkCamera::onCaptureCompleted(ACameraCaptureSession* session, ACaptureReque
     if (afSupported && (m_params.autoFocus != 0))
     {
         if (mResult.afState == ACAMERA_CONTROL_AF_STATE_PASSIVE_FOCUSED)
+        {
+            // Will lock it
+            if (mResult.afLockSetted == 0)
             {
                 uint8_t trig = ACAMERA_CONTROL_AF_TRIGGER_START;
                 status = ACaptureRequest_setEntry_u8(capture_request, ACAMERA_CONTROL_AF_TRIGGER, 1, &trig);
+
+                mResult.afLockSetted = 1;
                 XYLOG(XYLOG_SEVERITY_DEBUG, "Trigger AF AFS=%u", (uint32_t)mResult.afState);
             }
         }
+    }
 
     unsigned long long ts = GetMicroTimeStamp();
 #if 0