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#include "precomp.hpp"

using namespace cv;
using namespace cv::gpu;

#if !defined (HAVE_CUDA) || defined (CUDA_DISABLER)

void cv::gpu::meanShiftFiltering(const GpuMat&, GpuMat&, int, int, TermCriteria, Stream&) { throw_no_cuda(); }
void cv::gpu::meanShiftProc(const GpuMat&, GpuMat&, GpuMat&, int, int, TermCriteria, Stream&) { throw_no_cuda(); }

#else /* !defined (HAVE_CUDA) */

////////////////////////////////////////////////////////////////////////
// meanShiftFiltering_GPU

namespace cv { namespace gpu { namespace cudev
{
    namespace imgproc
    {
        void meanShiftFiltering_gpu(const PtrStepSzb& src, PtrStepSzb dst, int sp, int sr, int maxIter, float eps, cudaStream_t stream);
    }
}}}

void cv::gpu::meanShiftFiltering(const GpuMat& src, GpuMat& dst, int sp, int sr, TermCriteria criteria, Stream& stream)
{
    using namespace ::cv::gpu::cudev::imgproc;

    if( src.empty() )
        CV_Error( cv::Error::StsBadArg, "The input image is empty" );

    if( src.depth() != CV_8U || src.channels() != 4 )
        CV_Error( cv::Error::StsUnsupportedFormat, "Only 8-bit, 4-channel images are supported" );

    dst.create( src.size(), CV_8UC4 );

    if( !(criteria.type & TermCriteria::MAX_ITER) )
        criteria.maxCount = 5;

    int maxIter = std::min(std::max(criteria.maxCount, 1), 100);

    float eps;
    if( !(criteria.type & TermCriteria::EPS) )
        eps = 1.f;
    eps = (float)std::max(criteria.epsilon, 0.0);

    meanShiftFiltering_gpu(src, dst, sp, sr, maxIter, eps, StreamAccessor::getStream(stream));
}

////////////////////////////////////////////////////////////////////////
// meanShiftProc_GPU

namespace cv { namespace gpu { namespace cudev
{
    namespace imgproc
    {
        void meanShiftProc_gpu(const PtrStepSzb& src, PtrStepSzb dstr, PtrStepSzb dstsp, int sp, int sr, int maxIter, float eps, cudaStream_t stream);
    }
}}}

void cv::gpu::meanShiftProc(const GpuMat& src, GpuMat& dstr, GpuMat& dstsp, int sp, int sr, TermCriteria criteria, Stream& stream)
{
    using namespace ::cv::gpu::cudev::imgproc;

    if( src.empty() )
        CV_Error( cv::Error::StsBadArg, "The input image is empty" );

    if( src.depth() != CV_8U || src.channels() != 4 )
        CV_Error( cv::Error::StsUnsupportedFormat, "Only 8-bit, 4-channel images are supported" );

    dstr.create( src.size(), CV_8UC4 );
    dstsp.create( src.size(), CV_16SC2 );

    if( !(criteria.type & TermCriteria::MAX_ITER) )
        criteria.maxCount = 5;

    int maxIter = std::min(std::max(criteria.maxCount, 1), 100);

    float eps;
    if( !(criteria.type & TermCriteria::EPS) )
        eps = 1.f;
    eps = (float)std::max(criteria.epsilon, 0.0);

    meanShiftProc_gpu(src, dstr, dstsp, sp, sr, maxIter, eps, StreamAccessor::getStream(stream));
}

#endif /* !defined (HAVE_CUDA) */