1/* 2 * Copyright (C) 2007-2008 ARM Limited 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 * 16 */ 17/** 18 * 19 * File Name: omxVCCOMM_Average_8x.c 20 * OpenMAX DL: v1.0.2 21 * Revision: 9641 22 * Date: Thursday, February 7, 2008 23 * 24 * 25 * 26 * Description: 27 * This function will calculate Average of two 8x4 or 8x8 or 8x16 blocks 28 * 29 */ 30 31#include "omxtypes.h" 32#include "armOMX.h" 33#include "omxVC.h" 34 35#include "armCOMM.h" 36#include "armVC.h" 37 38/** 39 * Function: omxVCCOMM_Average_8x (6.1.3.1.1) 40 * 41 * Description: 42 * This function calculates the average of two 8x4, 8x8, or 8x16 blocks. The 43 * result is rounded according to (a+b+1)/2. The block average function can 44 * be used in conjunction with half-pixel interpolation to obtain quarter 45 * pixel motion estimates, as described in [ISO14496-10], subclause 8.4.2.2.1. 46 * 47 * Input Arguments: 48 * 49 * pPred0 - Pointer to the top-left corner of reference block 0 50 * pPred1 - Pointer to the top-left corner of reference block 1 51 * iPredStep0 - Step of reference block 0 52 * iPredStep1 - Step of reference block 1 53 * iDstStep - Step of the destination buffer. 54 * iHeight - Height of the blocks 55 * 56 * Output Arguments: 57 * 58 * pDstPred - Pointer to the destination buffer. 8-byte aligned. 59 * 60 * Return Value: 61 * 62 * OMX_Sts_NoErr - no error 63 * OMX_Sts_BadArgErr - bad arguments; returned under any of the following 64 * conditions: 65 * - one or more of the following pointers is NULL: pPred0, pPred1, or 66 * pDstPred. 67 * - pDstPred is not aligned on an 8-byte boundary. 68 * - iPredStep0 <= 0 or iPredStep0 is not a multiple of 8. 69 * - iPredStep1 <= 0 or iPredStep1 is not a multiple of 8. 70 * - iDstStep <= 0 or iDstStep is not a multiple of 8. 71 * - iHeight is not 4, 8, or 16. 72 * 73 */ 74 OMXResult omxVCCOMM_Average_8x ( 75 const OMX_U8* pPred0, 76 const OMX_U8* pPred1, 77 OMX_U32 iPredStep0, 78 OMX_U32 iPredStep1, 79 OMX_U8* pDstPred, 80 OMX_U32 iDstStep, 81 OMX_U32 iHeight 82) 83{ 84 /* check for argument error */ 85 armRetArgErrIf(pPred0 == NULL, OMX_Sts_BadArgErr) 86 armRetArgErrIf(pPred1 == NULL, OMX_Sts_BadArgErr) 87 armRetArgErrIf(pDstPred == NULL, OMX_Sts_BadArgErr) 88 armRetArgErrIf((iPredStep0 == 0) || (iPredStep0 & 7), OMX_Sts_BadArgErr) 89 armRetArgErrIf((iPredStep1 == 0) || (iPredStep1 & 7), OMX_Sts_BadArgErr) 90 armRetArgErrIf((iDstStep == 0) || (iDstStep & 7), OMX_Sts_BadArgErr) 91 armRetArgErrIf((iHeight != 4) && (iHeight != 8) && (iHeight != 16), OMX_Sts_BadArgErr) 92 armRetArgErrIf(armNot8ByteAligned(pDstPred), OMX_Sts_BadArgErr) 93 94 return armVCCOMM_Average 95 (pPred0, pPred1, iPredStep0, iPredStep1, pDstPred, iDstStep, 8, iHeight); 96} 97 98 99/***************************************************************************** 100 * END OF FILE 101 *****************************************************************************/ 102 103