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      1 /**
      2  *
      3  * File Name:  omxVCM4P10_SADQuar_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 of pSrc with average of two Ref blocks
     13  * of 4x8 or 4x4 blocks
     14  *
     15  */
     16 
     17 #include "omxtypes.h"
     18 #include "armOMX.h"
     19 #include "omxVC.h"
     20 
     21 #include "armVC.h"
     22 #include "armCOMM.h"
     23 
     24 /**
     25  * Function:  omxVCM4P10_SADQuar_4x   (6.3.5.4.2)
     26  *
     27  * Description:
     28  * This function calculates the SAD between one block (pSrc) and the average
     29  * of the other two (pSrcRef0 and pSrcRef1) for 4x8 or 4x4 blocks.  Rounding
     30  * is applied according to the convention (a+b+1)>>1.
     31  *
     32  * Input Arguments:
     33  *
     34  *   pSrc - Pointer to the original block; must be aligned on a 4-byte
     35  *            boundary.
     36  *   pSrcRef0 - Pointer to reference block 0
     37  *   pSrcRef1 - Pointer to reference block 1
     38  *   iSrcStep - Step of the original block buffer; must be a multiple of 4.
     39  *   iRefStep0 - Step of reference block 0
     40  *   iRefStep1 - Step of reference block 1
     41  *   iHeight - Height of the block; must be equal to either 4 or 8.
     42  *
     43  * Output Arguments:
     44  *
     45  *   pDstSAD - Pointer of result SAD
     46  *
     47  * Return Value:
     48  *    OMX_Sts_NoErr, if the function runs without error.
     49  *    OMX_Sts_BadArgErr - bad arguments: if one of the following cases occurs:
     50  *    -    iHeight is not equal to either 4 or 8.
     51  *    -    One of more of the following pointers is NULL: pSrc, pSrcRef0,
     52  *              pSrcRef1, pDstSAD.
     53  *    -    iSrcStep is not a multiple of 4
     54  *    -    Any alignment restrictions are violated
     55  *
     56  */
     57 OMXResult omxVCM4P10_SADQuar_4x(
     58 	  const OMX_U8* 	pSrc,
     59       const OMX_U8* 	pSrcRef0,
     60 	  const OMX_U8* 	pSrcRef1,
     61       OMX_U32 	iSrcStep,
     62       OMX_U32	iRefStep0,
     63       OMX_U32	iRefStep1,
     64       OMX_U32*	pDstSAD,
     65       OMX_U32   iHeight
     66 )
     67 {
     68     /* check for argument error */
     69     armRetArgErrIf(pSrc == NULL, OMX_Sts_BadArgErr);
     70     armRetArgErrIf(pSrcRef0 == NULL, OMX_Sts_BadArgErr);
     71     armRetArgErrIf(pSrcRef1 == NULL, OMX_Sts_BadArgErr);
     72     armRetArgErrIf(pDstSAD == NULL, OMX_Sts_BadArgErr);
     73     armRetArgErrIf((iHeight != 8) && (iHeight != 4), OMX_Sts_BadArgErr);
     74     armRetArgErrIf(armNot4ByteAligned(pSrc), OMX_Sts_BadArgErr);
     75     armRetArgErrIf((iSrcStep == 0) || (iSrcStep & 3), OMX_Sts_BadArgErr);
     76 
     77     return armVCM4P10_SADQuar
     78         (pSrc, pSrcRef0, pSrcRef1, iSrcStep,
     79         iRefStep0, iRefStep1, pDstSAD, iHeight, 4);
     80 }
     81 
     82 /*****************************************************************************
     83  *                              END OF FILE
     84  *****************************************************************************/
     85 
     86