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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: omxVCM4P2_BlockMatch_Integer_16x16.c
* OpenMAX DL: v1.0.2
* Revision: 9641
* Date: Thursday, February 7, 2008
*
*
*
*
* Description:
* Contains modules for Block matching, a full search algorithm
* is implemented
*
*/
#include "omxtypes.h"
#include "armOMX.h"
#include "omxVC.h"
#include "armVC.h"
#include "armCOMM.h"
/**
* Function: omxVCM4P2_BlockMatch_Integer_16x16 (6.2.4.2.1)
*
* Description:
* Performs a 16x16 block search; estimates motion vector and associated
* minimum SAD. Both the input and output motion vectors are represented using
* half-pixel units, and therefore a shift left or right by 1 bit may be
* required, respectively, to match the input or output MVs with other
* functions that either generate output MVs or expect input MVs represented
* using integer pixel units.
*
* Input Arguments:
*
* pSrcRefBuf - pointer to the reference Y plane; points to the reference
* MB that corresponds to the location of the current macroblock in
* the current plane.
* refWidth - width of the reference plane
* pRefRect - pointer to the valid reference plane rectangle; coordinates
* are specified relative to the image origin. Rectangle
* boundaries may extend beyond image boundaries if the image has
* been padded. For example, if padding extends 4 pixels beyond
* frame border, then the value for the left border could be set to
* -4.
* pSrcCurrBuf - pointer to the current block in the current macroblock
* buffer extracted from the original plane (linear array, 256
* entries); must be aligned on a 16-byte boundary. The number of
* bytes between lines (step) is 16.
* pCurrPointPos - position of the current macroblock in the current plane
* pSrcPreMV - pointer to predicted motion vector; NULL indicates no
* predicted MV
* pSrcPreSAD - pointer to SAD associated with the predicted MV (referenced
* by pSrcPreMV); may be set to NULL if unavailable.
* pMESpec - vendor-specific motion estimation specification structure;
* must have been allocated and then initialized using
* omxVCM4P2_MEInit prior to calling the block matching function.
*
* Output Arguments:
*
* pDstMV - pointer to estimated MV
* pDstSAD - pointer to minimum SAD
*
* Return Value:
*
* OMX_Sts_NoErr - no error
* OMX_Sts_BadArgErr - bad arguments. Returned if one of the following
* conditions is true:
* - at least one of the following pointers is NULL: pSrcRefBuf,
* pRefRect, pSrcCurrBuff, pCurrPointPos, pDstMV, pDstSAD or
* pMESpec, or
* - pSrcCurrBuf is not 16-byte aligned
*
*/
OMXResult omxVCM4P2_BlockMatch_Integer_16x16(
const OMX_U8 *pSrcRefBuf,
OMX_INT refWidth,
const OMXRect *pRefRect,
const OMX_U8 *pSrcCurrBuf,
const OMXVCM4P2Coordinate *pCurrPointPos,
const OMXVCMotionVector *pSrcPreMV,
const OMX_INT *pSrcPreSAD,
void *pMESpec,
OMXVCMotionVector *pDstMV,
OMX_INT *pDstSAD
)
{
OMX_U8 BlockSize = 16;
/* Argument error checks */
armRetArgErrIf(!armIs16ByteAligned(pSrcCurrBuf), OMX_Sts_BadArgErr);
return ( armVCM4P2_BlockMatch_Integer(
pSrcRefBuf,
refWidth,
pRefRect,
pSrcCurrBuf,
pCurrPointPos,
pSrcPreMV,
pSrcPreSAD,
pMESpec,
pDstMV,
pDstSAD,
BlockSize)
);
}
/* End of file */
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