umc_color_space_converter_ycbcr.cpp

这是在PCA下的基于IPP库示例代码例子,在网上下了IPP的库之后,设置相关参数就可以编译该代码.

/*
//
//              INTEL CORPORATION PROPRIETARY INFORMATION
//  This software is supplied under the terms of a license  agreement or
//  nondisclosure agreement with Intel Corporation and may not be copied
//  or disclosed except in  accordance  with the terms of that agreement.
//    Copyright (c) 2003-2005 Intel Corporation. All Rights Reserved.
//
*/

#include <stdlib.h>
#include <ippi.h>
#include <ippcc.h>
#include "umc_color_space_converter.h"
#include "vm_debug.h"

namespace UMC
{

class PIXEL_YCBCR
{
public:
    vm_var32 Y;
    vm_var32 U;
    vm_var32 V;

    PIXEL_YCBCR &operator = (vm_var32 lValue)
    {
        Y = U = V = lValue;
        return *this;
    };

    PIXEL_YCBCR &operator += (PIXEL_YCBCR &Value)
    {
        Y += Value.Y;
        U += Value.U;
        V += Value.V;
        return *this;
    };

    PIXEL_YCBCR &operator -= (PIXEL_YCBCR &Value)
    {
        Y -= Value.Y;
        U -= Value.U;
        V -= Value.V;
        return *this;
    };

    PIXEL_YCBCR &operator *= (vm_var32 lValue)
    {
        Y *= lValue;
        U *= lValue;
        V *= lValue;
        return *this;
    };

    PIXEL_YCBCR &operator /= (vm_var32 lValue)
    {
        Y /= lValue;
        U /= lValue;
        V /= lValue;
        return *this;
    };
};

class POINTER_YCBCR
{
public:
    POINTER_YCBCR(void)
    {
        m_lpbData = NULL;
        m_bOdd = true;
    };

    POINTER_YCBCR &operator = (void *lpv)
    {
        m_lpbData = reinterpret_cast<vm_byte *> (lpv);
        m_bOdd = true;
        return *this;
    };

    POINTER_YCBCR &operator += (size_t lValue)
    {
        if (0 < (signed) lValue)
        {
            // we set pointer only to UYVY quad potion
            if (m_bOdd)
            {
                m_lpbData += (lValue & ~(1)) * 2;
                m_bOdd = (lValue & 1) ? (false) : (true);
            }
            else
            {
                m_lpbData += ((lValue + 1) & ~(1)) * 2;
                m_bOdd = (lValue & 1) ? (true) : (false);
            };
        }
        else if (0 > (signed) lValue)
        {
            if (m_bOdd)
            {
                m_lpbData += ((lValue - 1) & ~(1)) * 2;
                m_bOdd = (lValue & 1) ? (false) : (true);
            }
            else
            {
                m_lpbData += (lValue & ~(1)) * 2;
                m_bOdd = (lValue & 1) ? (true) : (false);
            };
        };

        return *this;
    };

    POINTER_YCBCR &operator -= (size_t lValue)
    {
        return operator += ((unsigned) -((signed) lValue));
    };

    POINTER_YCBCR &operator ++ (void)
    {
        return operator += (1);
    };

    POINTER_YCBCR &operator -- (void)
    {
        return operator += ((unsigned) -1);
    };

    operator PIXEL_YCBCR(void)
    {
        PIXEL_YCBCR yuv = {(m_bOdd) ? (m_lpbData[0]) : (m_lpbData[2]), m_lpbData[1], m_lpbData[3]};
        return yuv;
    };

    void operator = (PIXEL_YCBCR yuv)
    {
        if (m_bOdd)
        {
            m_lpbData[0] = static_cast<vm_byte> (yuv.Y);
            m_lpbData[1] = static_cast<vm_byte> (yuv.U);
            m_lpbData[3] = static_cast<vm_byte> (yuv.V);
        }
        else
        {
            m_lpbData[2] = static_cast<vm_byte> (yuv.Y);
            m_lpbData[1] = static_cast<vm_byte> ((yuv.U + m_lpbData[1]) / 2);
            m_lpbData[3] = static_cast<vm_byte> ((yuv.V + m_lpbData[3]) / 2);
        };
    };

    POINTER_YCBCR operator *(void)
    {
        POINTER_YCBCR ptr = *this;
        return ptr;
    };

    POINTER_YCBCR operator [](size_t lValue)
    {
        POINTER_YCBCR ptr = *this;
        ptr.operator += (lValue);
        return ptr;
    };

protected:
    vm_byte *m_lpbData;
    bool m_bOdd;
};

// Intel compiler makes a remark
// "value copied to temporary, reference to temporary used"
#ifdef __ICL
#pragma warning(disable : 383)
#endif // __ICL

static
void resize_hor_YCbCr(void *lpvSrc, IppiSize SizeSrc, size_t lPitchSrc,
                      void *lpvDst, IppiSize SizeDst, size_t lPitchDst)
{
    // if images are equal
    if (SizeDst.width == SizeSrc.width)
    {
        IppiSize SizeDest = {SizeDst.width * 2, SizeDst.height};

        ippiCopy_8u_C1R(reinterpret_cast<vm_byte *> (lpvSrc),
                        (vm_var32) lPitchSrc,
                        reinterpret_cast<vm_byte *> (lpvDst),
                        (vm_var32) lPitchDst,
                        SizeDest);
    }
    // stretching image in
    else if (SizeDst.width < SizeSrc.width)
    {
        vm_var32 nWeight = SizeSrc.width, nPixelWeight = SizeDst.width;
        PIXEL_YCBCR Pixel, Value;
        vm_var32 x, y;
        vm_var32 nCurWeight;
        POINTER_YCBCR lpSrc, lpDst;

        for (y = 0;y < (unsigned) SizeSrc.height;y++)
        {
            lpSrc = reinterpret_cast<vm_byte *> (lpvSrc) + lPitchSrc * y;
            lpDst = reinterpret_cast<vm_byte *> (lpvDst) + lPitchDst * y;

            Pixel = 0;
            nCurWeight = nWeight;
            for (x = 0;x < (unsigned) SizeDst.width;x++)
            {
                // get whole pixels
                while (nCurWeight >= nPixelWeight)
                {
                    PIXEL_YCBCR Temp = lpSrc[0];
                    Pixel += Temp;
                    nCurWeight -= nPixelWeight;
                    ++lpSrc;
                };

                // get pixel part
                if (nCurWeight)
                {
                    PIXEL_YCBCR Tail;
                    Tail = static_cast<PIXEL_YCBCR> (*lpSrc);
                    Tail *= nCurWeight;
                    Tail /= nPixelWeight;
                    Value = Pixel;
                    Value += Tail;
                    Pixel = static_cast<PIXEL_YCBCR> (*lpSrc);
                    Pixel -= Tail;
                    ++lpSrc;
                    nCurWeight = nWeight - (nPixelWeight - nCurWeight);
                }
                // only whole pixels used
                else
                {
                    Value = Pixel;
                    Pixel = 0;
                    nCurWeight = nWeight;
                };

                // write new pixel
                Value *= nPixelWeight;
                Value /= nWeight;
                lpDst = Value;
                ++lpDst;
            };
        };

    }
    // stretching image out
    else
    {
        vm_var32 nWeight = SizeSrc.width, nPixelWeight = SizeDst.width;
        PIXEL_YCBCR Pixel;
        vm_var32 x, y;
        vm_var32 nCurWeight;
        POINTER_YCBCR lpSrc, lpDst;

        for (y = 0;y < (unsigned) SizeDst.height;y++)
        {
            lpSrc = reinterpret_cast<vm_byte *> (lpvSrc) + lPitchSrc * y;
            lpDst = reinterpret_cast<vm_byte *> (lpvDst) + lPitchDst * y;

            nCurWeight = nPixelWeight;
            for (x = 0;x < (unsigned) SizeDst.width;x++)
            {
                Pixel = *lpSrc;
                if (nCurWeight < nWeight)
                {
                    PIXEL_YCBCR Tail;

                    ++lpSrc;
                    Pixel *= nCurWeight;
                    Tail = *lpSrc;