From 51eba617a8a99951ebe7ac6836a8056976f8cd4b Mon Sep 17 00:00:00 2001
From: Vadim Pisarevsky <vadim.pisarevsky@gmail.com>
Date: Fri, 1 Feb 2013 14:01:44 +0400
Subject: [PATCH] a part of PR269 (parallelization of several functions) by
 Alexander Mordvintsev

---
 modules/core/src/matrix.cpp | 20 ++++++++++----------
 modules/core/src/stat.cpp   | 10 +++++-----
 2 files changed, 15 insertions(+), 15 deletions(-)

diff --git a/modules/core/src/matrix.cpp b/modules/core/src/matrix.cpp
index 54adb5d..f21e6ac 100644
--- a/modules/core/src/matrix.cpp
+++ b/modules/core/src/matrix.cpp
@@ -2459,7 +2459,7 @@ static void generateRandomCenter(const vector<Vec2f>& box, float* center, RNG& r
         center[j] = ((float)rng*(1.f+margin*2.f)-margin)*(box[j][1] - box[j][0]) + box[j][0];
 }
 
-class KMeansPPDistanceComputer
+class KMeansPPDistanceComputer : public ParallelLoopBody
 {
 public:
     KMeansPPDistanceComputer( float *_tdist2,
@@ -2475,10 +2475,10 @@ public:
           step(_step),
           stepci(_stepci) { }
 
-    void operator()( const cv::BlockedRange& range ) const
+    void operator()( const cv::Range& range ) const
     {
-        const int begin = range.begin();
-        const int end = range.end();
+        const int begin = range.start;
+        const int end = range.end;
 
         for ( int i = begin; i<end; i++ )
         {
@@ -2534,7 +2534,7 @@ static void generateCentersPP(const Mat& _data, Mat& _out_centers,
                     break;
             int ci = i;
 
-            parallel_for(BlockedRange(0, N),
+            parallel_for_(Range(0, N),
                          KMeansPPDistanceComputer(tdist2, data, dist, dims, step, step*ci));
             for( i = 0; i < N; i++ )
             {
@@ -2562,7 +2562,7 @@ static void generateCentersPP(const Mat& _data, Mat& _out_centers,
     }
 }
 
-class KMeansDistanceComputer
+class KMeansDistanceComputer : public ParallelLoopBody
 {
 public:
     KMeansDistanceComputer( double *_distances,
@@ -2576,10 +2576,10 @@ public:
     {
     }
 
-    void operator()( const BlockedRange& range ) const
+    void operator()( const Range& range ) const
     {
-        const int begin = range.begin();
-        const int end = range.end();
+        const int begin = range.start;
+        const int end = range.end;
         const int K = centers.rows;
         const int dims = centers.cols;
 
@@ -2836,7 +2836,7 @@ double cv::kmeans( InputArray _data, int K,
             // assign labels
             Mat dists(1, N, CV_64F);
             double* dist = dists.ptr<double>(0);
-            parallel_for(BlockedRange(0, N),
+            parallel_for_(Range(0, N),
                          KMeansDistanceComputer(dist, labels, data, centers));
             compactness = 0;
             for( i = 0; i < N; i++ )
diff --git a/modules/core/src/stat.cpp b/modules/core/src/stat.cpp
index fe98cf7..b62f10a 100644
--- a/modules/core/src/stat.cpp
+++ b/modules/core/src/stat.cpp
@@ -1726,7 +1726,7 @@ typedef void (*BatchDistFunc)(const uchar* src1, const uchar* src2, size_t step2
                               int nvecs, int len, uchar* dist, const uchar* mask);
 
 
-struct BatchDistInvoker
+struct BatchDistInvoker : public ParallelLoopBody
 {
     BatchDistInvoker( const Mat& _src1, const Mat& _src2,
                       Mat& _dist, Mat& _nidx, int _K,
@@ -1743,12 +1743,12 @@ struct BatchDistInvoker
         func = _func;
     }
 
-    void operator()(const BlockedRange& range) const
+    void operator()(const Range& range) const
     {
         AutoBuffer<int> buf(src2->rows);
         int* bufptr = buf;
 
-        for( int i = range.begin(); i < range.end(); i++ )
+        for( int i = range.start; i < range.end; i++ )
         {
             func(src1->ptr(i), src2->ptr(), src2->step, src2->rows, src2->cols,
                  K > 0 ? (uchar*)bufptr : dist->ptr(i), mask->data ? mask->ptr(i) : 0);
@@ -1899,8 +1899,8 @@ void cv::batchDistance( InputArray _src1, InputArray _src2,
                   ("The combination of type=%d, dtype=%d and normType=%d is not supported",
                    type, dtype, normType));
 
-    parallel_for(BlockedRange(0, src1.rows),
-                 BatchDistInvoker(src1, src2, dist, nidx, K, mask, update, func));
+    parallel_for_(Range(0, src1.rows),
+                  BatchDistInvoker(src1, src2, dist, nidx, K, mask, update, func));
 }
 
 
-- 
2.7.4