From 7655a67384895868c0afa72bfda9a9b2fcfdf323 Mon Sep 17 00:00:00 2001
From: Moritz Pflanzer <moritz.pflanzer@arm.com>
Date: Sat, 23 Sep 2017 11:57:33 +0100
Subject: COMPMID-507: Move Sobel to new validation

Change-Id: Ic0a9dbd8e646abbf8d9ea52e497a5fe60e499cc7
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/88883
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
---
 tests/validation/CPP/Utils.h | 31 ++++++++++++++++++++++++++++---
 1 file changed, 28 insertions(+), 3 deletions(-)

(limited to 'tests/validation/CPP/Utils.h')

diff --git a/tests/validation/CPP/Utils.h b/tests/validation/CPP/Utils.h
index 557d85f204..2d879c129b 100644
--- a/tests/validation/CPP/Utils.h
+++ b/tests/validation/CPP/Utils.h
@@ -47,9 +47,34 @@ T tensor_elem_at(const SimpleTensor<T> &in, Coordinates coord, BorderMode border
 template <typename T>
 T bilinear_policy(const SimpleTensor<T> &in, Coordinates id, float xn, float yn, BorderMode border_mode, T constant_border_value);
 
-template <typename T1, typename T2, typename T3>
-void apply_2d_spatial_filter(Coordinates coord, const SimpleTensor<T1> &in, SimpleTensor<T3> &out, const TensorShape &filter_shape, const T2 *filter_itr, float scale, BorderMode border_mode,
-                             T1 constant_border_value = 0);
+/* Apply 2D spatial filter on a single element of @p in at coordinates @p coord
+ *
+ * - filter sizes have to be odd number
+ * - Row major order of filter assumed
+ * - TO_ZERO rounding policy assumed
+ * - SATURATE convert policy assumed
+ */
+template <typename T, typename U, typename V>
+void apply_2d_spatial_filter(Coordinates coord, const SimpleTensor<T> &src, SimpleTensor<U> &dst, const TensorShape &filter_shape, const V *filter_itr, double scale, BorderMode border_mode,
+                             T constant_border_value = T(0))
+{
+    double    val = 0.;
+    const int x   = coord.x();
+    const int y   = coord.y();
+    for(int j = y - static_cast<int>(filter_shape[1] / 2); j <= y + static_cast<int>(filter_shape[1] / 2); ++j)
+    {
+        for(int i = x - static_cast<int>(filter_shape[0] / 2); i <= x + static_cast<int>(filter_shape[0] / 2); ++i)
+        {
+            coord.set(0, i);
+            coord.set(1, j);
+            val += static_cast<double>(*filter_itr) * tensor_elem_at(src, coord, border_mode, constant_border_value);
+            ++filter_itr;
+        }
+    }
+    coord.set(0, x);
+    coord.set(1, y);
+    dst[coord2index(src.shape(), coord)] = saturate_cast<U>(support::cpp11::trunc(val * scale));
+}
 
 RawTensor transpose(const RawTensor &src, int chunk_width = 1);
 } // namespace validation
-- 
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