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// @Authors
//    Fangfang Bai, fangfang@multicorewareinc.com
//    Jin Ma,       jin@multicorewareinc.com
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#include "perf_precomp.hpp"
#include <functional>

using namespace perf;

///////////// HOG////////////////////////

struct RectLess :
        public std::binary_function<cv::Rect, cv::Rect, bool>
{
    bool operator()(const cv::Rect& a,
        const cv::Rect& b) const
    {
        if (a.x != b.x)
            return a.x < b.x;
        else if (a.y != b.y)
            return a.y < b.y;
        else if (a.width != b.width)
            return a.width < b.width;
        else
            return a.height < b.height;
    }
};

OCL_PERF_TEST(HOGFixture, HOG)
{
    Mat src = imread(getDataPath("gpu/hog/road.png"), cv::IMREAD_GRAYSCALE);
    ASSERT_TRUE(!src.empty()) << "can't open input image road.png";

    vector<cv::Rect> found_locations;
    declare.in(src);

    if (RUN_PLAIN_IMPL)
    {
        HOGDescriptor hog;
        hog.setSVMDetector(hog.getDefaultPeopleDetector());

        TEST_CYCLE() hog.detectMultiScale(src, found_locations);

        std::sort(found_locations.begin(), found_locations.end(), RectLess());
        SANITY_CHECK(found_locations, 1 + DBL_EPSILON);
    }
    else if (RUN_OCL_IMPL)
    {
        ocl::HOGDescriptor ocl_hog;
        ocl_hog.setSVMDetector(ocl_hog.getDefaultPeopleDetector());
        ocl::oclMat oclSrc(src);

        OCL_TEST_CYCLE() ocl_hog.detectMultiScale(oclSrc, found_locations);

        std::sort(found_locations.begin(), found_locations.end(), RectLess());
        SANITY_CHECK(found_locations, 1 + DBL_EPSILON);
    }
    else
        OCL_PERF_ELSE
}