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#include "../test_precomp.hpp"
#include "opencv2/ts/ocl_test.hpp"

#ifdef HAVE_OPENCL

namespace opencv_test { namespace {

PARAM_TEST_CASE(OCL_DenseOpticalFlow_DIS, int)
{
    int preset;

    virtual void SetUp()
    {
        preset = GET_PARAM(0);
    }
};

OCL_TEST_P(OCL_DenseOpticalFlow_DIS, Mat)
{
    Mat frame1, frame2, GT;

    frame1 = imread(TS::ptr()->get_data_path() + "optflow/RubberWhale1.png");
    frame2 = imread(TS::ptr()->get_data_path() + "optflow/RubberWhale2.png");

    CV_Assert(!frame1.empty() && !frame2.empty());

    cvtColor(frame1, frame1, COLOR_BGR2GRAY);
    cvtColor(frame2, frame2, COLOR_BGR2GRAY);

    Ptr<DenseOpticalFlow> algo;

    // iterate over presets:
    for (int i = 0; i < cvtest::ocl::test_loop_times; i++)
    {
        Mat flow;
        UMat ocl_flow;

        algo = DISOpticalFlow::create(preset);
        OCL_OFF(algo->calc(frame1, frame2, flow));
        OCL_ON(algo->calc(frame1, frame2, ocl_flow));
        ASSERT_EQ(flow.rows, ocl_flow.rows);
        ASSERT_EQ(flow.cols, ocl_flow.cols);

        EXPECT_MAT_SIMILAR(flow, ocl_flow, 6e-3);
    }
}

OCL_INSTANTIATE_TEST_CASE_P(Video, OCL_DenseOpticalFlow_DIS,
                            Values(DISOpticalFlow::PRESET_ULTRAFAST,
                                   DISOpticalFlow::PRESET_FAST,
                                   DISOpticalFlow::PRESET_MEDIUM));

}} // namespace

#endif // HAVE_OPENCL