av/media/libstagefright/codecs/on2/h264dec/omxdl/reference/vc/m4p10/src/omxVCM4P10_SADQuar_8x.c

/*
 * 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:  omxVCM4P10_SADQuar_8x.c
 * OpenMAX DL: v1.0.2
 * Revision:   9641
 * Date:       Thursday, February 7, 2008
 * 
 * 
 * 
 * Description:
 * This function will calculate SAD of pSrc with average of two Ref blocks
 * of 8x16 or 8x8 or 8x4
 * 
 */

#include "omxtypes.h"
#include "armOMX.h"
#include "omxVC.h"

#include "armVC.h"
#include "armCOMM.h"

/**
 * Function:  omxVCM4P10_SADQuar_8x   (6.3.5.4.3)
 *
 * Description:
 * This function calculates the SAD between one block (pSrc) and the average 
 * of the other two (pSrcRef0 and pSrcRef1) for 8x16, 8x8, or 8x4 blocks.  
 * Rounding is applied according to the convention (a+b+1)>>1. 
 *
 * Input Arguments:
 *   
 *   pSrc - Pointer to the original block; must be aligned on an 8-byte 
 *            boundary. 
 *   pSrcRef0 - Pointer to reference block 0 
 *   pSrcRef1 - Pointer to reference block 1 
 *   iSrcStep - Step of the original block buffer; must be a multiple of 8. 
 *   iRefStep0 - Step of reference block 0 
 *   iRefStep1 - Step of reference block 1 
 *   iHeight - Height of the block; must be equal either 4, 8, or 16. 
 *
 * Output Arguments:
 *   
 *   pDstSAD - Pointer of result SAD 
 *
 * Return Value:
 *    OMX_Sts_NoErr, if the function runs without error.
 *    OMX_Sts_BadArgErr - bad arguments: if one of the following cases occurs: 
 *    -    iHeight is not equal to either 4, 8, or 16. 
 *    -    One of more of the following pointers is NULL: pSrc, pSrcRef0, 
 *              pSrcRef1, pDstSAD. 
 *    -    iSrcStep is not a multiple of 8 
 *    -    Any alignment restrictions are violated 
 *
 */
OMXResult omxVCM4P10_SADQuar_8x( 
	const OMX_U8* 	pSrc,
    const OMX_U8* 	pSrcRef0,
	const OMX_U8* 	pSrcRef1,	
    OMX_U32 	iSrcStep,
    OMX_U32		iRefStep0,
    OMX_U32		iRefStep1,
    OMX_U32*	pDstSAD,
    OMX_U32     iHeight
)
{
    /* check for argument error */
    armRetArgErrIf(pSrc == NULL, OMX_Sts_BadArgErr)
    armRetArgErrIf(pSrcRef0 == NULL, OMX_Sts_BadArgErr)
    armRetArgErrIf(pSrcRef1 == NULL, OMX_Sts_BadArgErr)
    armRetArgErrIf(pDstSAD == NULL, OMX_Sts_BadArgErr)
    armRetArgErrIf((iHeight != 16) && (iHeight != 8) && 
        (iHeight != 4), OMX_Sts_BadArgErr)
    armRetArgErrIf(armNot8ByteAligned(pSrc), OMX_Sts_BadArgErr)
    armRetArgErrIf((iSrcStep == 0) || (iSrcStep & 7), OMX_Sts_BadArgErr)
    

    return armVCM4P10_SADQuar
        (pSrc, pSrcRef0, pSrcRef1, iSrcStep, 
        iRefStep0, iRefStep1, pDstSAD, iHeight, 8);
}

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 *                              END OF FILE
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