1/** 2 * 3 * File Name: omxVCM4P10_Average_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 Average of two 4x4 or 4x8 blocks 13 * 14 */ 15 16#include "omxtypes.h" 17#include "armOMX.h" 18#include "omxVC.h" 19 20#include "armCOMM.h" 21#include "armVC.h" 22 23/** 24 * Function: omxVCM4P10_Average_4x (6.3.5.5.3) 25 * 26 * Description: 27 * This function calculates the average of two 4x4, 4x8 blocks. The result 28 * is rounded according to (a+b+1)/2. 29 * 30 * Input Arguments: 31 * 32 * pPred0 - Pointer to the top-left corner of reference block 0 33 * pPred1 - Pointer to the top-left corner of reference block 1 34 * iPredStep0 - Step of reference block 0; must be a multiple of 4. 35 * iPredStep1 - Step of reference block 1; must be a multiple of 4. 36 * iDstStep - Step of the destination buffer; must be a multiple of 4. 37 * iHeight - Height of the blocks; must be either 4 or 8. 38 * 39 * Output Arguments: 40 * 41 * pDstPred - Pointer to the destination buffer. 4-byte alignment required. 42 * 43 * Return Value: 44 * 45 * OMX_Sts_NoErr - no error 46 * OMX_Sts_BadArgErr - bad arguments; returned if any of the following 47 * conditions are true: 48 * - at least one of the following pointers is NULL: 49 * pPred0, pPred1, or pDstPred 50 * - pDstPred is not aligned on a 4-byte boundary 51 * - iPredStep0 <= 0 or iPredStep0 is not a multiple of 4 52 * - iPredStep1 <= 0 or iPredStep1 is not a multiple of 4 53 * - iDstStep <= 0 or iDstStep is not a multiple of 4 54 * - iHeight is not equal to either 4 or 8 55 * 56 */ 57 OMXResult omxVCM4P10_Average_4x ( 58 const OMX_U8* pPred0, 59 const OMX_U8* pPred1, 60 OMX_U32 iPredStep0, 61 OMX_U32 iPredStep1, 62 OMX_U8* pDstPred, 63 OMX_U32 iDstStep, 64 OMX_U32 iHeight 65) 66{ 67 /* check for argument error */ 68 armRetArgErrIf(pPred0 == NULL, OMX_Sts_BadArgErr) 69 armRetArgErrIf(pPred1 == NULL, OMX_Sts_BadArgErr) 70 armRetArgErrIf(pDstPred == NULL, OMX_Sts_BadArgErr) 71 armRetArgErrIf((iHeight != 4) && (iHeight != 8), OMX_Sts_BadArgErr) 72 armRetArgErrIf((iPredStep0 == 0) || (iPredStep0 & 3), OMX_Sts_BadArgErr) 73 armRetArgErrIf((iPredStep1 == 0) || (iPredStep1 & 3), OMX_Sts_BadArgErr) 74 armRetArgErrIf((iDstStep == 0) || (iDstStep & 3), OMX_Sts_BadArgErr) 75 armRetArgErrIf(armNot4ByteAligned(pDstPred), OMX_Sts_BadArgErr) 76 77 return armVCCOMM_Average 78 (pPred0, pPred1, iPredStep0, iPredStep1, pDstPred, iDstStep, 4, iHeight); 79} 80 81/***************************************************************************** 82 * END OF FILE 83 *****************************************************************************/ 84 85