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//		Yao Wang, bitwangyaoyao@gmail.com
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#include "precomp.hpp"
#include "opencv2/core/core.hpp"
#include "opencv2/objdetect/objdetect.hpp"

using namespace cv;
using namespace testing;
#ifdef HAVE_OPENCL

extern string workdir;

///////////////////// HOG /////////////////////////////
PARAM_TEST_CASE(HOG, Size, int)
{
    Size winSize;
    int type;
    Mat img_rgb;
    virtual void SetUp()
    {
        winSize = GET_PARAM(0);
        type = GET_PARAM(1);
        img_rgb = readImage(workdir + "../gpu/road.png");
        if(img_rgb.empty())
        {
            std::cout << "Couldn't read road.png" << std::endl;
        }
    }
};

TEST_P(HOG, GetDescriptors)
{
    // Convert image
    Mat img;
    switch (type)
    {
    case CV_8UC1:
        cvtColor(img_rgb, img, CV_BGR2GRAY);
        break;
    case CV_8UC4:
    default:
        cvtColor(img_rgb, img, CV_BGR2BGRA);
        break;
    }
    ocl::oclMat d_img(img);

    // HOGs
    ocl::HOGDescriptor ocl_hog;
    ocl_hog.gamma_correction = true;
    HOGDescriptor hog;
    hog.gammaCorrection = true;

    // Compute descriptor
    ocl::oclMat d_descriptors;
    ocl_hog.getDescriptors(d_img, ocl_hog.win_size, d_descriptors, ocl_hog.DESCR_FORMAT_COL_BY_COL);
    Mat down_descriptors;
    d_descriptors.download(down_descriptors);
    down_descriptors = down_descriptors.reshape(0, down_descriptors.cols * down_descriptors.rows);

    hog.setSVMDetector(hog.getDefaultPeopleDetector());
    std::vector<float> descriptors;
    switch (type)
    {
    case CV_8UC1:
        hog.compute(img, descriptors, ocl_hog.win_size);
        break;
    case CV_8UC4:
    default:
        hog.compute(img_rgb, descriptors, ocl_hog.win_size);
        break;
    }
    Mat cpu_descriptors(descriptors);

    EXPECT_MAT_SIMILAR(down_descriptors, cpu_descriptors, 1e-2);
}

TEST_P(HOG, Detect)
{
    // Convert image
    Mat img;
    switch (type)
    {
    case CV_8UC1:
        cvtColor(img_rgb, img, CV_BGR2GRAY);
        break;
    case CV_8UC4:
    default:
        cvtColor(img_rgb, img, CV_BGR2BGRA);
        break;
    }
    ocl::oclMat d_img(img);

    // HOGs
    if ((winSize != Size(48, 96)) && (winSize != Size(64, 128)))
        winSize = Size(64, 128);
    ocl::HOGDescriptor ocl_hog(winSize);
    ocl_hog.gamma_correction = true;

    HOGDescriptor hog;
    hog.winSize = winSize;
    hog.gammaCorrection = true;

    if (winSize.width == 48 && winSize.height == 96)
    {
        // daimler's base
        ocl_hog.setSVMDetector(hog.getDaimlerPeopleDetector());
        hog.setSVMDetector(hog.getDaimlerPeopleDetector());
    }
    else if (winSize.width == 64 && winSize.height == 128)
    {
        ocl_hog.setSVMDetector(hog.getDefaultPeopleDetector());
        hog.setSVMDetector(hog.getDefaultPeopleDetector());
    }
    else
    {
        ocl_hog.setSVMDetector(hog.getDefaultPeopleDetector());
        hog.setSVMDetector(hog.getDefaultPeopleDetector());
    }

    // OpenCL detection
    std::vector<Rect> d_found;
    ocl_hog.detectMultiScale(d_img, d_found, 0, Size(8, 8), Size(0, 0), 1.05, 6);

    // CPU detection
    std::vector<Rect> found;
    switch (type)
    {
    case CV_8UC1:
        hog.detectMultiScale(img, found, 0, Size(8, 8), Size(0, 0), 1.05, 6);
        break;
    case CV_8UC4:
    default:
        hog.detectMultiScale(img_rgb, found, 0, Size(8, 8), Size(0, 0), 1.05, 6);
        break;
    }

    EXPECT_LT(checkRectSimilarity(img.size(), found, d_found), 1.0);
}


INSTANTIATE_TEST_CASE_P(OCL_ObjDetect, HOG, testing::Combine(
                            testing::Values(Size(64, 128), Size(48, 96)),
                            testing::Values(MatType(CV_8UC1), MatType(CV_8UC4))));

///////////////////////////// Haar //////////////////////////////
IMPLEMENT_PARAM_CLASS(CascadeName, std::string);
CascadeName cascade_frontalface_alt(std::string("haarcascade_frontalface_alt.xml"));
CascadeName cascade_frontalface_alt2(std::string("haarcascade_frontalface_alt2.xml"));
struct getRect
{
    Rect operator ()(const CvAvgComp &e) const
    {
        return e.rect;
    }
};

PARAM_TEST_CASE(Haar, int, CascadeName)
{
    ocl::OclCascadeClassifier cascade, nestedCascade;
    CascadeClassifier cpucascade, cpunestedCascade;

    int flags;
    std::string cascadeName;
    vector<Rect> faces, oclfaces;
    Mat img;
    ocl::oclMat d_img;

    virtual void SetUp()
    {
        flags = GET_PARAM(0);
        cascadeName = (workdir + "../../data/haarcascades/").append(GET_PARAM(1));
        if( (!cascade.load( cascadeName )) || (!cpucascade.load(cascadeName)) )
        {
            std::cout << "ERROR: Could not load classifier cascade" << std::endl;
            return;
        }
        img = readImage(workdir + "lena.jpg", IMREAD_GRAYSCALE);
        if(img.empty())
        {
            std::cout << "Couldn't read lena.jpg" << std::endl;
            return ;
        }
        equalizeHist(img, img);
        d_img.upload(img);
    }
};

TEST_P(Haar, FaceDetect)
{
    MemStorage storage(cvCreateMemStorage(0));
    CvSeq *_objects;
    _objects = cascade.oclHaarDetectObjects(d_img, storage, 1.1, 3, 
                                            flags, Size(30, 30), Size(0, 0));
    vector<CvAvgComp> vecAvgComp;
    Seq<CvAvgComp>(_objects).copyTo(vecAvgComp);
    oclfaces.resize(vecAvgComp.size());
    std::transform(vecAvgComp.begin(), vecAvgComp.end(), oclfaces.begin(), getRect());
    
    cpucascade.detectMultiScale(img, faces,  1.1, 3,
                                flags,
                                Size(30, 30), Size(0, 0));

    EXPECT_LT(checkRectSimilarity(img.size(), faces, oclfaces), 1.0);
}

TEST_P(Haar, FaceDetectUseBuf)
{
    ocl::OclCascadeClassifierBuf cascadebuf;
    if(!cascadebuf.load(cascadeName))
    {
        std::cout << "ERROR: Could not load classifier cascade for FaceDetectUseBuf!" << std::endl;
        return;
    }
    cascadebuf.detectMultiScale(d_img, oclfaces,  1.1, 3,
                                flags,
                                Size(30, 30), Size(0, 0));
    cpucascade.detectMultiScale(img, faces,  1.1, 3,
                                flags,
                                Size(30, 30), Size(0, 0));

    // intentionally run ocl facedetect again and check if it still works after the first run
    cascadebuf.detectMultiScale(d_img, oclfaces,  1.1, 3,
                                flags,
                                Size(30, 30));
    cascadebuf.release();

    EXPECT_LT(checkRectSimilarity(img.size(), faces, oclfaces), 1.0);
}

INSTANTIATE_TEST_CASE_P(OCL_ObjDetect, Haar,
    Combine(Values(CV_HAAR_SCALE_IMAGE, 0), 
            Values(cascade_frontalface_alt/*, cascade_frontalface_alt2*/)));

#endif //HAVE_OPENCL