Merge pull request #9042 from terfendail:haar_avx

AVX optimized implementation of haar migrated to separate file

modules/objdetect/src/haar.hpp

+/*M///////////////////////////////////////////////////////////////////////////////////////
+//
+//  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
+//
+//  By downloading, copying, installing or using the software you agree to this license.
+//  If you do not agree to this license, do not download, install,
+//  copy or use the software.
+//
+//
+//                        Intel License Agreement
+//                For Open Source Computer Vision Library
+//
+// Copyright (C) 2000, Intel Corporation, all rights reserved.
+// Third party copyrights are property of their respective owners.
+//
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+//
+//   * Redistribution's of source code must retain the above copyright notice,
+//     this list of conditions and the following disclaimer.
+//
+//   * Redistribution's in binary form must reproduce the above copyright notice,
+//     this list of conditions and the following disclaimer in the documentation
+//     and/or other materials provided with the distribution.
+//
+//   * The name of Intel Corporation may not be used to endorse or promote products
+//     derived from this software without specific prior written permission.
+//
+// This software is provided by the copyright holders and contributors "as is" and
+// any express or implied warranties, including, but not limited to, the implied
+// warranties of merchantability and fitness for a particular purpose are disclaimed.
+// In no event shall the Intel Corporation or contributors be liable for any direct,
+// indirect, incidental, special, exemplary, or consequential damages
+// (including, but not limited to, procurement of substitute goods or services;
+// loss of use, data, or profits; or business interruption) however caused
+// and on any theory of liability, whether in contract, strict liability,
+// or tort (including negligence or otherwise) arising in any way out of
+// the use of this software, even if advised of the possibility of such damage.
+//
+//M*/
+
+/* Haar features calculation */
+
+#ifndef OPENCV_OBJDETECT_HAAR_HPP
+#define OPENCV_OBJDETECT_HAAR_HPP
+
+#define CV_HAAR_FEATURE_MAX_LOCAL 3
+
+typedef int sumtype;
+typedef double sqsumtype;
+
+typedef struct CvHidHaarFeature
+{
+    struct
+    {
+        sumtype *p0, *p1, *p2, *p3;
+        float weight;
+    }
+    rect[CV_HAAR_FEATURE_MAX_LOCAL];
+} CvHidHaarFeature;
+
+
+typedef struct CvHidHaarTreeNode
+{
+    CvHidHaarFeature feature;
+    float threshold;
+    int left;
+    int right;
+} CvHidHaarTreeNode;
+
+
+typedef struct CvHidHaarClassifier
+{
+    int count;
+    //CvHaarFeature* orig_feature;
+    CvHidHaarTreeNode* node;
+    float* alpha;
+} CvHidHaarClassifier;
+
+#define calc_sumf(rect,offset) \
+    static_cast<float>((rect).p0[offset] - (rect).p1[offset] - (rect).p2[offset] + (rect).p3[offset])
+
+namespace cv_haar_avx
+{
+#if 0 /*CV_TRY_AVX*/
+    #define CV_HAAR_USE_AVX 1
+#else
+    #define CV_HAAR_USE_AVX 0
+#endif
+
+#if CV_HAAR_USE_AVX
+    // AVX version icvEvalHidHaarClassifier.  Process 8 CvHidHaarClassifiers per call. Check AVX support before invocation!!
+    double icvEvalHidHaarClassifierAVX(CvHidHaarClassifier* classifier, double variance_norm_factor, size_t p_offset);
+    double icvEvalHidHaarStumpClassifierAVX(CvHidHaarClassifier* classifier, double variance_norm_factor, size_t p_offset);
+    double icvEvalHidHaarStumpClassifierTwoRectAVX(CvHidHaarClassifier* classifier, double variance_norm_factor, size_t p_offset);
+#endif
+}
+
+#endif
+
+/* End of file. */