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 ;// File Name: armVCM4P2_SetPredDir_s.s 19 ;// OpenMAX DL: v1.0.2 20 ;// Revision: 9641 21 ;// Date: Thursday, February 7, 2008 22 ;// 23 ;// 24 ;// 25 ;// 26 27 ; ** 28 ; * Function: armVCM4P2_SetPredDir 29 ; * 30 ; * Description: 31 ; * Performs detecting the prediction direction 32 ; * 33 ; * Remarks: 34 ; * 35 ; * Parameters: 36 ; * [in] blockIndex block index indicating the component type and 37 ; * position as defined in subclause 6.1.3.8, of ISO/IEC 38 ; * 14496-2. Furthermore, indexes 6 to 9 indicate the 39 ; * alpha blocks spatially corresponding to luminance 40 ; * blocks 0 to 3 in the same macroblock. 41 ; * [in] pCoefBufRow pointer to the coefficient row buffer 42 ; * [in] pQpBuf pointer to the quantization parameter buffer 43 ; * [out]predQP quantization parameter of the predictor block 44 ; * [out]predDir indicates the prediction direction which takes one 45 ; * of the following values: 46 ; * OMX_VC_HORIZONTAL predict horizontally 47 ; * OMX_VC_VERTICAL predict vertically 48 ; * 49 ; * Return Value: 50 ; * Standard OMXResult result. See enumeration for possible result codes. 51 ; * 52 ; */ 53 54 INCLUDE omxtypes_s.h 55 INCLUDE armCOMM_s.h 56 INCLUDE omxVC_s.h 57 58 59 M_VARIANTS ARM1136JS 60 61 62 IF ARM1136JS 63 64 ;// Input Arguments 65 BlockIndex RN 0 66 pCoefBufRow RN 1 67 pCoefBufCol RN 2 68 predDir RN 3 69 predQP RN 4 70 pQpBuf RN 5 71 72 ;// Local Variables 73 74 Return RN 0 75 blockDCLeft RN 6 76 blockDCTop RN 7 77 blockDCTopLeft RN 8 78 temp1 RN 9 79 temp2 RN 14 80 81 M_START armVCM4P2_SetPredDir,r9 82 83 M_ARG ppredQP,4 84 M_ARG ppQpBuf,4 85 86 LDRH blockDCTopLeft,[pCoefBufRow,#-16] 87 LDRH blockDCLeft,[pCoefBufCol] 88 89 TEQ BlockIndex,#3 90 LDREQH blockDCTop,[pCoefBufCol,#-16] 91 LDRNEH blockDCTop,[pCoefBufRow] 92 93 SUBS temp1,blockDCLeft,blockDCTopLeft 94 RSBLT temp1,temp1,#0 95 SUBS temp2,blockDCTopLeft,blockDCTop 96 RSBLT temp2,temp2,#0 97 98 M_LDR pQpBuf,ppQpBuf 99 M_LDR predQP,ppredQP 100 CMP temp1,temp2 101 MOV temp2,#OMX_VC_VERTICAL 102 LDRLTB temp1,[pQpBuf,#1] 103 STRLT temp2,[predDir] 104 STRLT temp1,[predQP] 105 MOV temp2,#OMX_VC_HORIZONTAL 106 LDRGEB temp1,[pQpBuf] 107 STRGE temp2,[predDir] 108 MOV Return,#OMX_Sts_NoErr 109 STRGE temp1,[predQP] 110 111 112 113 M_END 114 115 ENDIF 116 117 END 118 119
