From d17b33131c14864bd1eae275f49a3f148e21cf29 Mon Sep 17 00:00:00 2001
From: Leo Chan <leochanj@live.unc.edu>
Date: Thu, 22 Oct 2020 01:53:21 -0400
Subject: Squashed commit of the sb-vbs branch.

Includes the SD-VBS benchmarks modified to:
- Use libextra to loop as realtime jobs
- Preallocate memory before starting their main computation
- Accept input via stdin instead of via argc

Does not include the SD-VBS matlab code.

Fixes libextra execution in LITMUS^RT.
---
 .../tracking/src/c/getInterpolatePatch.c           | 43 ++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 SD-VBS/benchmarks/tracking/src/c/getInterpolatePatch.c

(limited to 'SD-VBS/benchmarks/tracking/src/c/getInterpolatePatch.c')

diff --git a/SD-VBS/benchmarks/tracking/src/c/getInterpolatePatch.c b/SD-VBS/benchmarks/tracking/src/c/getInterpolatePatch.c
new file mode 100644
index 0000000..99e95f9
--- /dev/null
+++ b/SD-VBS/benchmarks/tracking/src/c/getInterpolatePatch.c
@@ -0,0 +1,43 @@
+/********************************
+Author: Sravanthi Kota Venkata
+********************************/
+
+#include "tracking.h"
+
+/** Perform simple interpolation around  2*winSize*2*winSize neighbourhood **/
+F2D* getInterpolatePatch(F2D* src, int cols, float centerX, float centerY, int winSize)
+{
+    F2D *dst;
+    float a, b, a11, a12, a21, a22;
+    int i, j, k, srcIdx, dstIdx;
+    int srcIdxx, dstIdxx;
+
+    a = centerX - floor(centerX);
+    b = centerY - floor(centerY);
+
+    a11 = (1-a)*(1-b);
+    a12 = a*(1-b);
+    a21 = (1-a)*b;
+    a22 = a*b;
+
+    dst = fSetArray(1,2*winSize*2*winSize, 0);
+
+
+    for(i=-winSize; i<winSize; i++)
+    {
+        srcIdxx = floor(centerY) + i;
+        dstIdxx = i+winSize;
+
+        for(j=-winSize; j<(winSize); j++)
+        {
+            srcIdx = srcIdxx * cols + floor(centerX) + j;
+            dstIdx = dstIdxx * 2 * winSize + j + winSize;
+            asubsref(dst,dstIdx) = asubsref(src,srcIdx)*a11 + asubsref(src,srcIdx+1)*a12 + asubsref(src,srcIdx+cols)*a21 + asubsref(src,srcIdx+1+cols)*a22;
+        }
+    }
+
+    return dst;
+}
+
+
+
-- 
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