1 ;// 2 ;// 3 ;// File Name: armVCM4P2_SetPredDir_s.s 4 ;// OpenMAX DL: v1.0.2 5 ;// Revision: 12290 6 ;// Date: Wednesday, April 9, 2008 7 ;// 8 ;// (c) Copyright 2007-2008 ARM Limited. All Rights Reserved. 9 ;// 10 ;// 11 ;// 12 13 ; ** 14 ; * Function: armVCM4P2_SetPredDir 15 ; * 16 ; * Description: 17 ; * Performs detecting the prediction direction 18 ; * 19 ; * Remarks: 20 ; * 21 ; * Parameters: 22 ; * [in] blockIndex block index indicating the component type and 23 ; * position as defined in subclause 6.1.3.8, of ISO/IEC 24 ; * 14496-2. Furthermore, indexes 6 to 9 indicate the 25 ; * alpha blocks spatially corresponding to luminance 26 ; * blocks 0 to 3 in the same macroblock. 27 ; * [in] pCoefBufRow pointer to the coefficient row buffer 28 ; * [in] pQpBuf pointer to the quantization parameter buffer 29 ; * [out]predQP quantization parameter of the predictor block 30 ; * [out]predDir indicates the prediction direction which takes one 31 ; * of the following values: 32 ; * OMX_VC_HORIZONTAL predict horizontally 33 ; * OMX_VC_VERTICAL predict vertically 34 ; * 35 ; * Return Value: 36 ; * Standard OMXResult result. See enumeration for possible result codes. 37 ; * 38 ; */ 39 40 INCLUDE omxtypes_s.h 41 INCLUDE armCOMM_s.h 42 INCLUDE omxVC_s.h 43 44 45 M_VARIANTS ARM1136JS 46 47 48 IF ARM1136JS 49 50 ;// Input Arguments 51 BlockIndex RN 0 52 pCoefBufRow RN 1 53 pCoefBufCol RN 2 54 predDir RN 3 55 predQP RN 4 56 pQpBuf RN 5 57 58 ;// Local Variables 59 60 Return RN 0 61 blockDCLeft RN 6 62 blockDCTop RN 7 63 blockDCTopLeft RN 8 64 temp1 RN 9 65 temp2 RN 14 66 67 M_START armVCM4P2_SetPredDir,r9 68 69 M_ARG ppredQP,4 70 M_ARG ppQpBuf,4 71 72 LDRH blockDCTopLeft,[pCoefBufRow,#-16] 73 LDRH blockDCLeft,[pCoefBufCol] 74 75 TEQ BlockIndex,#3 76 LDREQH blockDCTop,[pCoefBufCol,#-16] 77 LDRNEH blockDCTop,[pCoefBufRow] 78 79 SUBS temp1,blockDCLeft,blockDCTopLeft 80 RSBLT temp1,temp1,#0 81 SUBS temp2,blockDCTopLeft,blockDCTop 82 RSBLT temp2,temp2,#0 83 84 M_LDR pQpBuf,ppQpBuf 85 M_LDR predQP,ppredQP 86 CMP temp1,temp2 87 MOV temp2,#OMX_VC_VERTICAL 88 LDRLTB temp1,[pQpBuf,#1] 89 STRLT temp2,[predDir] 90 STRLT temp1,[predQP] 91 MOV temp2,#OMX_VC_HORIZONTAL 92 LDRGEB temp1,[pQpBuf] 93 STRGE temp2,[predDir] 94 MOV Return,#OMX_Sts_NoErr 95 STRGE temp1,[predQP] 96 97 98 99 M_END 100 101 ENDIF 102 103 END 104 105
