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: omxVCM4P2_BlockMatch_Half_16x16.c 20 * OpenMAX DL: v1.0.2 21 * Revision: 9641 22 * Date: Thursday, February 7, 2008 23 * 24 * 25 * 26 * 27 * Description: 28 * Contains modules for Block matching, a full search algorithm 29 * is implemented 30 * 31 */ 32 33#include "omxtypes.h" 34#include "armOMX.h" 35#include "omxVC.h" 36 37#include "armVC.h" 38#include "armCOMM.h" 39 40/** 41 * Function: omxVCM4P2_BlockMatch_Half_16x16 (6.2.4.2.3) 42 * 43 * Description: 44 * Performs a 16x16 block match with half-pixel resolution. Returns the 45 * estimated motion vector and associated minimum SAD. This function 46 * estimates the half-pixel motion vector by interpolating the integer 47 * resolution motion vector referenced by the input parameter pSrcDstMV, i.e., 48 * the initial integer MV is generated externally. The input parameters 49 * pSrcRefBuf and pSearchPointRefPos should be shifted by the winning MV of 50 * 16x16 integer search prior to calling BlockMatch_Half_16x16. The function 51 * BlockMatch_Integer_16x16 may be used for integer motion estimation. 52 * 53 * Input Arguments: 54 * 55 * pSrcRefBuf - pointer to the reference Y plane; points to the reference 56 * macroblock that corresponds to the location of the current 57 * macroblock in the current plane. 58 * refWidth - width of the reference plane 59 * pRefRect - reference plane valid region rectangle 60 * pSrcCurrBuf - pointer to the current block in the current macroblock 61 * buffer extracted from the original plane (linear array, 256 62 * entries); must be aligned on a 16-byte boundary. The number of 63 * bytes between lines (step) is 16. 64 * pSearchPointRefPos - position of the starting point for half pixel 65 * search (specified in terms of integer pixel units) in the 66 * reference plane, i.e., the reference position pointed to by the 67 * predicted motion vector. 68 * rndVal - rounding control parameter: 0 - disabled; 1 - enabled. 69 * pSrcDstMV - pointer to the initial MV estimate; typically generated 70 * during a prior 16X16 integer search; specified in terms of 71 * half-pixel units. 72 * 73 * Output Arguments: 74 * 75 * pSrcDstMV - pointer to estimated MV 76 * pDstSAD - pointer to minimum SAD 77 * 78 * Return Value: 79 * 80 * OMX_Sts_NoErr - no error 81 * OMX_Sts_BadArgErr - bad arguments. Returned if one of the following 82 * conditions is true: 83 * - at least one of the following pointers is NULL: pSrcRefBuf, 84 * pRefRect, pSrcCurrBuff, pSearchPointRefPos, pSrcDstMV. 85 * - pSrcCurrBuf is not 16-byte aligned, or 86 * 87 */ 88 89OMXResult omxVCM4P2_BlockMatch_Half_16x16( 90 const OMX_U8 *pSrcRefBuf, 91 OMX_INT refWidth, 92 const OMXRect *pRefRect, 93 const OMX_U8 *pSrcCurrBuf, 94 const OMXVCM4P2Coordinate *pSearchPointRefPos, 95 OMX_INT rndVal, 96 OMXVCMotionVector *pSrcDstMV, 97 OMX_INT *pDstSAD 98) 99{ 100 101 /* For a blocksize of 16x16 */ 102 OMX_U8 BlockSize = 16; 103 104 /* Argument error checks */ 105 armRetArgErrIf(pSrcRefBuf == NULL, OMX_Sts_BadArgErr); 106 armRetArgErrIf(pRefRect == NULL, OMX_Sts_BadArgErr); 107 armRetArgErrIf(pSrcCurrBuf == NULL, OMX_Sts_BadArgErr); 108 armRetArgErrIf(pSearchPointRefPos == NULL, OMX_Sts_BadArgErr); 109 armRetArgErrIf(pSrcDstMV == NULL, OMX_Sts_BadArgErr); 110 armRetArgErrIf(!armIs16ByteAligned(pSrcCurrBuf), OMX_Sts_BadArgErr); 111 112 return (armVCM4P2_BlockMatch_Half( 113 pSrcRefBuf, 114 refWidth, 115 pRefRect, 116 pSrcCurrBuf, 117 pSearchPointRefPos, 118 rndVal, 119 pSrcDstMV, 120 pDstSAD, 121 BlockSize)); 122 123 124} 125 126/* End of file */ 127