armVCM4P2_CompareMV.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: armVCM4P2_CompareMV.c 20 * OpenMAX DL: v1.0.2 21 * Revision: 9641 22 * Date: Thursday, February 7, 2008 23 * 24 * 25 * 26 * 27 * Description: 28 * Contains module for comparing motion vectors and SAD's to decide 29 * the best MV and SAD 30 * 31 */ 32 33#include "omxtypes.h" 34#include "armOMX.h" 35 36#include "armVC.h" 37#include "armCOMM.h" 38 39/** 40 * Function: armVCM4P2_CompareMV 41 * 42 * Description: 43 * Performs comparision of motion vectors and SAD's to decide the 44 * best MV and SAD 45 * 46 * Remarks: 47 * 48 * Parameters: 49 * [in] mvX x coordinate of the candidate motion vector 50 * [in] mvY y coordinate of the candidate motion vector 51 * [in] candSAD Candidate SAD 52 * [in] bestMVX x coordinate of the best motion vector 53 * [in] bestMVY y coordinate of the best motion vector 54 * [in] bestSAD best SAD 55 * 56 * Return Value: 57 * OMX_INT -- 1 to indicate that the current sad is the best 58 * 0 to indicate that it is NOT the best SAD 59 */ 60 61OMX_INT armVCM4P2_CompareMV ( 62 OMX_S16 mvX, 63 OMX_S16 mvY, 64 OMX_INT candSAD, 65 OMX_S16 bestMVX, 66 OMX_S16 bestMVY, 67 OMX_INT bestSAD 68) 69{ 70 if (candSAD < bestSAD) 71 { 72 return 1; 73 } 74 if (candSAD > bestSAD) 75 { 76 return 0; 77 } 78 /* shorter motion vector */ 79 if ( (mvX * mvX + mvY * mvY) < (bestMVX*bestMVX+bestMVY*bestMVY) ) 80 { 81 return 1; 82 } 83 return 0; 84} 85 86/*End of File*/ 87