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      1 /**
      2  *
      3  * File Name:  omxVCM4P10_SAD_4x.c
      4  * OpenMAX DL: v1.0.2
      5  * Revision:   9641
      6  * Date:       Thursday, February 7, 2008
      7  *
      8  * (c) Copyright 2007-2008 ARM Limited. All Rights Reserved.
      9  *
     10  *
     11  * Description:
     12  * This function will calculate SAD for 4x8 and 4x4 blocks
     13  *
     14  */
     15 
     16 #include "omxtypes.h"
     17 #include "armOMX.h"
     18 #include "omxVC.h"
     19 
     20 #include "armVC.h"
     21 #include "armCOMM.h"
     22 
     23 /**
     24  * Function:  omxVCM4P10_SAD_4x   (6.3.5.4.1)
     25  *
     26  * Description:
     27  * This function calculates the SAD for 4x8 and 4x4 blocks.
     28  *
     29  * Input Arguments:
     30  *
     31  *   pSrcOrg -Pointer to the original block; must be aligned on a 4-byte
     32  *            boundary.
     33  *   iStepOrg -Step of the original block buffer; must be a multiple of 4.
     34  *   pSrcRef -Pointer to the reference block
     35  *   iStepRef -Step of the reference block buffer
     36  *   iHeight -Height of the block; must be equal to either 4 or 8.
     37  *
     38  * Output Arguments:
     39  *
     40  *   pDstSAD -Pointer of result SAD
     41  *
     42  * Return Value:
     43  *    OMX_Sts_NoErr, if the function runs without error.
     44  *    OMX_Sts_BadArgErr - bad arguments: if one of the following cases occurs:
     45  *    -    One of more of the following pointers is NULL:
     46  *         pSrcOrg, pSrcRef, or pDstSAD
     47  *    -    iHeight is not equal to either 4 or 8.
     48  *    -    iStepOrg is not a multiple of 4
     49  *    -    Any alignment restrictions are violated
     50  *
     51  */
     52 OMXResult omxVCM4P10_SAD_4x(
     53 	const OMX_U8* 	pSrcOrg,
     54 	OMX_U32 	iStepOrg,
     55 	const OMX_U8* 	pSrcRef,
     56 	OMX_U32 	iStepRef,
     57 	OMX_S32*	pDstSAD,
     58 	OMX_U32		iHeight
     59 )
     60 {
     61     /* check for argument error */
     62     armRetArgErrIf(pSrcOrg == NULL, OMX_Sts_BadArgErr)
     63     armRetArgErrIf(pSrcRef == NULL, OMX_Sts_BadArgErr)
     64     armRetArgErrIf(pDstSAD == NULL, OMX_Sts_BadArgErr)
     65     armRetArgErrIf((iHeight != 8) && (iHeight != 4), OMX_Sts_BadArgErr)
     66     armRetArgErrIf(armNot4ByteAligned(pSrcOrg), OMX_Sts_BadArgErr)
     67     armRetArgErrIf((iStepOrg == 0) || (iStepOrg & 3), OMX_Sts_BadArgErr)
     68     armRetArgErrIf((iStepRef == 0) || (iStepRef & 3), OMX_Sts_BadArgErr)
     69 
     70     return armVCCOMM_SAD
     71         (pSrcOrg, iStepOrg, pSrcRef, iStepRef, pDstSAD, iHeight, 4);
     72 }
     73 
     74 /*****************************************************************************
     75  *                              END OF FILE
     76  *****************************************************************************/
     77 
     78