omxVCM4P10_Average_4x.c revision 78e52bfac041d71ce53b5b13c2abf78af742b09d
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: omxVCM4P10_Average_4x.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 4x4 or 4x8 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: omxVCM4P10_Average_4x (6.3.5.5.3) 40 * 41 * Description: 42 * This function calculates the average of two 4x4, 4x8 blocks. The result 43 * is rounded according to (a+b+1)/2. 44 * 45 * Input Arguments: 46 * 47 * pPred0 - Pointer to the top-left corner of reference block 0 48 * pPred1 - Pointer to the top-left corner of reference block 1 49 * iPredStep0 - Step of reference block 0; must be a multiple of 4. 50 * iPredStep1 - Step of reference block 1; must be a multiple of 4. 51 * iDstStep - Step of the destination buffer; must be a multiple of 4. 52 * iHeight - Height of the blocks; must be either 4 or 8. 53 * 54 * Output Arguments: 55 * 56 * pDstPred - Pointer to the destination buffer. 4-byte alignment required. 57 * 58 * Return Value: 59 * 60 * OMX_Sts_NoErr - no error 61 * OMX_Sts_BadArgErr - bad arguments; returned if any of the following 62 * conditions are true: 63 * - at least one of the following pointers is NULL: 64 * pPred0, pPred1, or pDstPred 65 * - pDstPred is not aligned on a 4-byte boundary 66 * - iPredStep0 <= 0 or iPredStep0 is not a multiple of 4 67 * - iPredStep1 <= 0 or iPredStep1 is not a multiple of 4 68 * - iDstStep <= 0 or iDstStep is not a multiple of 4 69 * - iHeight is not equal to either 4 or 8 70 * 71 */ 72 OMXResult omxVCM4P10_Average_4x ( 73 const OMX_U8* pPred0, 74 const OMX_U8* pPred1, 75 OMX_U32 iPredStep0, 76 OMX_U32 iPredStep1, 77 OMX_U8* pDstPred, 78 OMX_U32 iDstStep, 79 OMX_U32 iHeight 80) 81{ 82 /* check for argument error */ 83 armRetArgErrIf(pPred0 == NULL, OMX_Sts_BadArgErr) 84 armRetArgErrIf(pPred1 == NULL, OMX_Sts_BadArgErr) 85 armRetArgErrIf(pDstPred == NULL, OMX_Sts_BadArgErr) 86 armRetArgErrIf((iHeight != 4) && (iHeight != 8), OMX_Sts_BadArgErr) 87 armRetArgErrIf((iPredStep0 == 0) || (iPredStep0 & 3), OMX_Sts_BadArgErr) 88 armRetArgErrIf((iPredStep1 == 0) || (iPredStep1 & 3), OMX_Sts_BadArgErr) 89 armRetArgErrIf((iDstStep == 0) || (iDstStep & 3), OMX_Sts_BadArgErr) 90 armRetArgErrIf(armNot4ByteAligned(pDstPred), OMX_Sts_BadArgErr) 91 92 return armVCCOMM_Average 93 (pPred0, pPred1, iPredStep0, iPredStep1, pDstPred, iDstStep, 4, iHeight); 94} 95 96/***************************************************************************** 97 * END OF FILE 98 *****************************************************************************/ 99 100