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/**
*
* File Name: armVCM4P10_Interpolate_Chroma.c
* OpenMAX DL: v1.0.2
* Revision: 9641
* Date: Thursday, February 7, 2008
*
* (c) Copyright 2007-2008 ARM Limited. All Rights Reserved.
*
*
* Description:
* This function will calculate interpolation for chroma components
*
*/
#include "omxtypes.h"
#include "armOMX.h"
#include "armCOMM.h"
/**
* Function: armVCM4P10_Interpolate_Chroma
*
* Description:
* This function performs interpolation for chroma components.
*
* Remarks:
*
* [in] pSrc Pointer to top-left corner of block used to
* interpolate in the reconstructed frame plane
* [in] iSrcStep Step of the source buffer.
* [in] iDstStep Step of the destination(interpolation) buffer.
* [in] iWidth Width of the current block
* [in] iHeight Height of the current block
* [in] dx Fractional part of horizontal motion vector
* component in 1/8 pixel unit (0~7)
* [in] dy Fractional part of vertical motion vector
* component in 1/8 pixel unit (0~7)
* [out] pDst Pointer to the interpolation buffer
*
* Return Value:
* Standard OMXResult value.
*
*/
OMXResult armVCM4P10_Interpolate_Chroma(
OMX_U8 *pSrc,
OMX_U32 iSrcStep,
OMX_U8 *pDst,
OMX_U32 iDstStep,
OMX_U32 iWidth,
OMX_U32 iHeight,
OMX_U32 dx,
OMX_U32 dy
)
{
OMX_U32 EightMinusdx = 8 - dx;
OMX_U32 EightMinusdy = 8 - dy;
OMX_U32 ACoeff, BCoeff, CCoeff, DCoeff;
OMX_U32 x, y;
/* check for argument error */
armRetArgErrIf(pSrc == NULL, OMX_Sts_BadArgErr)
armRetArgErrIf(pDst == NULL, OMX_Sts_BadArgErr)
armRetArgErrIf(dx > 7, OMX_Sts_BadArgErr)
armRetArgErrIf(dy > 7, OMX_Sts_BadArgErr)
armRetArgErrIf(iSrcStep == 0, OMX_Sts_BadArgErr)
armRetArgErrIf(iDstStep == 0, OMX_Sts_BadArgErr)
armRetArgErrIf(iWidth == 0, OMX_Sts_BadArgErr)
armRetArgErrIf(iHeight == 0, OMX_Sts_BadArgErr)
/* if fractionl mv is not (0, 0) */
if (dx != 0 || dy != 0)
{
ACoeff = EightMinusdx * EightMinusdy;
BCoeff = dx * EightMinusdy;
CCoeff = EightMinusdx * dy;
DCoeff = dx * dy;
for (y = 0; y < iHeight; y++)
{
for (x = 0; x < iWidth; x++)
{
pDst [y * iDstStep + x] = (
ACoeff * pSrc [y * iSrcStep + x] +
BCoeff * pSrc [y * iSrcStep + x + 1] +
CCoeff * pSrc [(y + 1) * iSrcStep + x] +
DCoeff * pSrc [(y + 1) * iSrcStep + x + 1] +
32) >> 6;
}
}
}
else
{
for (y = 0; y < iHeight; y++)
{
for (x = 0; x < iWidth; x++)
{
pDst [y * iDstStep + x] = pSrc [y * iSrcStep + x];
}
}
}
return OMX_Sts_NoErr;
}
/*****************************************************************************
* END OF FILE
*****************************************************************************/
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