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Multithread IPP gaussian blur

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This commit is contained in:
Woody Chow 2017-05-31 18:16:47 +09:00
parent 0d86681b88
commit d22fb5f949
1 changed files with 67 additions and 1 deletions
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68
modules/imgproc/src/smooth.cpp
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@ -2241,6 +2241,53 @@ static bool openvx_gaussianBlur(InputArray _src, OutputArray _dst, Size ksize,
#endif
#ifdef HAVE_IPP
#define IPP_GAUSSIANBLUR_PARALLEL 1
#ifdef HAVE_IPP_IW
class ipp_gaussianBlurParallel: public ParallelLoopBody
{
public:
ipp_gaussianBlurParallel(::ipp::IwiImage &src, ::ipp::IwiImage &dst, int kernelSize, float sigma, ::ipp::IwiBorderType &border, bool *pOk):
m_src(src), m_dst(dst), m_kernelSize(kernelSize), m_sigma(sigma), m_border(border), m_pOk(pOk) {
*m_pOk = true;
}
~ipp_gaussianBlurParallel()
{
}
virtual void operator() (const Range& range) const
{
CV_INSTRUMENT_REGION_IPP()
if(!*m_pOk)
return;
try
{
::ipp::IwiRoi roi = ::ipp::IwiRect(0, range.start, m_dst.m_size.width, range.end - range.start);
CV_INSTRUMENT_FUN_IPP(::ipp::iwiFilterGaussian, &m_src, &m_dst, m_kernelSize, m_sigma, m_border, &roi);
}
catch(::ipp::IwException e)
{
*m_pOk = false;
return;
}
}
private:
::ipp::IwiImage &m_src;
::ipp::IwiImage &m_dst;
int m_kernelSize;
float m_sigma;
::ipp::IwiBorderType &m_border;
volatile bool *m_pOk;
const ipp_gaussianBlurParallel& operator= (const ipp_gaussianBlurParallel&);
};
#endif
static bool ipp_GaussianBlur(InputArray _src, OutputArray _dst, Size ksize,
double sigma1, double sigma2, int borderType )
{
@ -2272,7 +2319,26 @@ static bool ipp_GaussianBlur(InputArray _src, OutputArray _dst, Size ksize,
if(!ippBorder.m_borderType)
return false;
CV_INSTRUMENT_FUN_IPP(::ipp::iwiFilterGaussian, &iwSrc, &iwDst, ksize.width, (float)sigma1, ippBorder);
// IW 2017u2 has bug which doesn't allow use of partial inMem with tiling
if((((ippBorder.m_borderFlags)&ippBorderInMem) && ((ippBorder.m_borderFlags)&ippBorderInMem) != ippBorderInMem)) {
return false;
}
bool ok;
ipp_gaussianBlurParallel invoker(iwSrc, iwDst, ksize.width, (float) sigma1, ippBorder, &ok);
if(!ok)
return false;
const Range range(0, (int) iwDst.m_size.height);
const int threads = ippiSuggestThreadsNum(iwDst, 2);
if(IPP_GAUSSIANBLUR_PARALLEL && threads > 1)
parallel_for_(range, invoker, threads*4);
else
invoker(range);
if(!ok)
return false;
}
catch (::ipp::IwException ex)
{