Fixed using local variable instead of global var.

- Still need to change SSE_2

modules/calib3d/src/stereobm.cpp

@@ -338,7 +338,7 @@ static void findStereoCorrespondenceBM_SSE2( const Mat& left, const Mat& right,
     int ftzero = state.preFilterCap;
     int textureThreshold = state.textureThreshold;
     int uniquenessRatio = state.uniquenessRatio;
-    short FILTERED = (short)((mindisp - 1) << DISPARITY_SHIFT);
+    short FILTERED = (short)((mindisp - 1) << DISPARITY_SHIFT_16S);
 
     ushort *sad, *hsad0, *hsad, *hsad_sub;
     int *htext;
@@ -1096,7 +1096,14 @@ public:
         if( params.uniquenessRatio < 0 )
             CV_Error( Error::StsOutOfRange, "uniqueness ratio must be non-negative" );
 
-        int FILTERED = (params.minDisparity - 1) << DISPARITY_SHIFT;
+	int disp_shift;
+	if (dtype == CV_16SC1)
+		disp_shift = DISPARITY_SHIFT_16S;
+	else
+		disp_shift = DISPARITY_SHIFT_32S;
+
+
+	int FILTERED = (params.minDisparity - 1) << disp_shift;
 
 #ifdef HAVE_OPENCL
         if(ocl::useOpenCL() && disparr.isUMat() && params.textureThreshold == 0)
@@ -1109,7 +1116,7 @@ public:
                     if( params.speckleRange >= 0 && params.speckleWindowSize > 0 )
                         filterSpeckles(disparr.getMat(), FILTERED, params.speckleWindowSize, params.speckleRange, slidingSumBuf);
                     if (dtype == CV_32F)
-                        disparr.getUMat().convertTo(disparr, CV_32FC1, 1./(1 << DISPARITY_SHIFT), 0);
+			disparr.getUMat().convertTo(disparr, CV_32FC1, 1./(1 << disp_shift), 0);
                     CV_IMPL_ADD(CV_IMPL_OCL);
                     return;
                 }
@@ -1138,7 +1145,7 @@ public:
 
         if( lofs >= width || rofs >= width || width1 < 1 )
         {
-            disp0 = Scalar::all( FILTERED * ( disp0.type() < CV_32F ? 1 : 1./(1 << DISPARITY_SHIFT) ) );
+	    disp0 = Scalar::all( FILTERED * ( disp0.type() < CV_32F ? 1 : 1./(1 << disp_shift) ) );
             return;
         }
 
@@ -1194,7 +1201,7 @@ public:
             filterSpeckles(disp, FILTERED, params.speckleWindowSize, params.speckleRange, slidingSumBuf);
 
         if (disp0.data != disp.data)
-            disp.convertTo(disp0, disp0.type(), 1./(1 << DISPARITY_SHIFT), 0);
+	    disp.convertTo(disp0, disp0.type(), 1./(1 << disp_shift), 0);
     }
 
     int getMinDisparity() const { return params.minDisparity; }