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/**
*
* File Name: omxVCM4P10_InvTransformResidualAndAdd.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 inverse integer 4x4 transform
*
*/
#include "omxtypes.h"
#include "armOMX.h"
#include "omxVC.h"
#include "armCOMM.h"
#include "armVC.h"
/**
* Function: omxVCM4P10_InvTransformResidualAndAdd (6.3.5.7.1)
*
* Description:
* This function performs inverse an 4x4 integer transformation to produce
* the difference signal and then adds the difference to the prediction to get
* the reconstructed signal.
*
* Input Arguments:
*
* pSrcPred - Pointer to prediction signal. 4-byte alignment required.
* pDequantCoeff - Pointer to the transformed coefficients. 8-byte
* alignment required.
* iSrcPredStep - Step of the prediction buffer; must be a multiple of 4.
* iDstReconStep - Step of the destination reconstruction buffer; must be a
* multiple of 4.
* bAC - Indicate whether there is AC coefficients in the coefficients
* matrix.
*
* Output Arguments:
*
* pDstRecon -Pointer to the destination reconstruction buffer. 4-byte
* alignment required.
*
* Return Value:
*
* OMX_Sts_NoErr - no error
* OMX_Sts_BadArgErr - bad arguments; returned if any of the following
* conditions are true:
* - at least one of the following pointers is NULL:
* pSrcPred, pDequantCoeff, pDstRecon
* - pSrcPred is not aligned on a 4-byte boundary
* - iSrcPredStep or iDstReconStep is not a multiple of 4.
* - pDequantCoeff is not aligned on an 8-byte boundary
*
*/
OMXResult omxVCM4P10_InvTransformResidualAndAdd(
const OMX_U8* pSrcPred,
const OMX_S16* pDequantCoeff,
OMX_U8* pDstRecon,
OMX_U32 iSrcPredStep,
OMX_U32 iDstReconStep,
OMX_U8 bAC
)
{
OMX_INT i, j;
OMX_S16 In[16], Out[16];
OMX_S32 Value;
/* check for argument error */
armRetArgErrIf(pSrcPred == NULL, OMX_Sts_BadArgErr)
armRetArgErrIf(armNot4ByteAligned(pSrcPred), OMX_Sts_BadArgErr)
armRetArgErrIf(pDequantCoeff == NULL, OMX_Sts_BadArgErr)
armRetArgErrIf(armNot8ByteAligned(pDequantCoeff), OMX_Sts_BadArgErr)
armRetArgErrIf(pDstRecon == NULL, OMX_Sts_BadArgErr)
armRetArgErrIf(armNot4ByteAligned(pDstRecon), OMX_Sts_BadArgErr)
armRetArgErrIf(bAC > 1, OMX_Sts_BadArgErr)
armRetArgErrIf(iSrcPredStep == 0 || iSrcPredStep & 3, OMX_Sts_BadArgErr)
armRetArgErrIf(iDstReconStep == 0 || iDstReconStep & 3, OMX_Sts_BadArgErr)
if (bAC)
{
for (i = 0; i < 16; i++)
{
In[i] = pDequantCoeff [i];
}
}
else
{
/* Copy DC */
In[0] = pDequantCoeff [0];
for (i = 1; i < 16; i++)
{
In[i] = 0;
}
}
/* Residual Transform */
armVCM4P10_TransformResidual4x4 (Out, In);
for (j = 0; j < 4; j++)
{
for (i = 0; i < 4; i++)
{
/* Add predition */
Value = (OMX_S32) Out [j * 4 + i] + pSrcPred [j * iSrcPredStep + i];
/* Saturate Value to OMX_U8 */
Value = armClip (0, 255, Value);
pDstRecon[j * iDstReconStep + i] = (OMX_U8) Value;
}
}
return OMX_Sts_NoErr;
}
/*****************************************************************************
* END OF FILE
*****************************************************************************/
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