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/*
* Copyright (C) 2007-2008 ARM Limited
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
/**
*
* File Name: omxVCCOMM_Average_8x.c
* OpenMAX DL: v1.0.2
* Revision: 9641
* Date: Thursday, February 7, 2008
*
*
*
* Description:
* This function will calculate Average of two 8x4 or 8x8 or 8x16 blocks
*
*/
#include "omxtypes.h"
#include "armOMX.h"
#include "omxVC.h"
#include "armCOMM.h"
#include "armVC.h"
/**
* Function: omxVCCOMM_Average_8x (6.1.3.1.1)
*
* Description:
* This function calculates the average of two 8x4, 8x8, or 8x16 blocks. The
* result is rounded according to (a+b+1)/2. The block average function can
* be used in conjunction with half-pixel interpolation to obtain quarter
* pixel motion estimates, as described in [ISO14496-10], subclause 8.4.2.2.1.
*
* Input Arguments:
*
* pPred0 - Pointer to the top-left corner of reference block 0
* pPred1 - Pointer to the top-left corner of reference block 1
* iPredStep0 - Step of reference block 0
* iPredStep1 - Step of reference block 1
* iDstStep - Step of the destination buffer.
* iHeight - Height of the blocks
*
* Output Arguments:
*
* pDstPred - Pointer to the destination buffer. 8-byte aligned.
*
* Return Value:
*
* OMX_Sts_NoErr - no error
* OMX_Sts_BadArgErr - bad arguments; returned under any of the following
* conditions:
* - one or more of the following pointers is NULL: pPred0, pPred1, or
* pDstPred.
* - pDstPred is not aligned on an 8-byte boundary.
* - iPredStep0 <= 0 or iPredStep0 is not a multiple of 8.
* - iPredStep1 <= 0 or iPredStep1 is not a multiple of 8.
* - iDstStep <= 0 or iDstStep is not a multiple of 8.
* - iHeight is not 4, 8, or 16.
*
*/
OMXResult omxVCCOMM_Average_8x (
const OMX_U8* pPred0,
const OMX_U8* pPred1,
OMX_U32 iPredStep0,
OMX_U32 iPredStep1,
OMX_U8* pDstPred,
OMX_U32 iDstStep,
OMX_U32 iHeight
)
{
/* check for argument error */
armRetArgErrIf(pPred0 == NULL, OMX_Sts_BadArgErr)
armRetArgErrIf(pPred1 == NULL, OMX_Sts_BadArgErr)
armRetArgErrIf(pDstPred == NULL, OMX_Sts_BadArgErr)
armRetArgErrIf((iPredStep0 == 0) || (iPredStep0 & 7), OMX_Sts_BadArgErr)
armRetArgErrIf((iPredStep1 == 0) || (iPredStep1 & 7), OMX_Sts_BadArgErr)
armRetArgErrIf((iDstStep == 0) || (iDstStep & 7), OMX_Sts_BadArgErr)
armRetArgErrIf((iHeight != 4) && (iHeight != 8) && (iHeight != 16), OMX_Sts_BadArgErr)
armRetArgErrIf(armNot8ByteAligned(pDstPred), OMX_Sts_BadArgErr)
return armVCCOMM_Average
(pPred0, pPred1, iPredStep0, iPredStep1, pDstPred, iDstStep, 8, iHeight);
}
/*****************************************************************************
* END OF FILE
*****************************************************************************/
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