1 /** 2 * 3 * File Name: omxVCM4P2_PredictReconCoefIntra.c 4 * OpenMAX DL: v1.0.2 5 * Revision: 9641 6 * Date: Thursday, February 7, 2008 7 * 8 * (c) Copyright 2007-2008 ARM Limited. All Rights Reserved. 9 * 10 * 11 * 12 * File: omxVCM4P2_PredictReconCoefIntra_S16.c 13 * Description: Contains modules for AC DC prediction 14 * 15 */ 16 17 #include "omxtypes.h" 18 #include "armOMX.h" 19 #include "omxVC.h" 20 21 #include "armCOMM.h" 22 #include "armVC.h" 23 24 /** 25 * Function: omxVCM4P2_PredictReconCoefIntra (6.2.5.4.3) 26 * 27 * Description: 28 * Performs adaptive DC/AC coefficient prediction for an intra block. Prior 29 * to the function call, prediction direction (predDir) should be selected as 30 * specified in [ISO14496-2], subclause 7.4.3.1. 31 * 32 * Input Arguments: 33 * 34 * pSrcDst - pointer to the coefficient buffer which contains the quantized 35 * coefficient residuals (PQF) of the current block; must be 36 * aligned on a 4-byte boundary. The output coefficients are 37 * saturated to the range [-2048, 2047]. 38 * pPredBufRow - pointer to the coefficient row buffer; must be aligned on 39 * a 4-byte boundary. 40 * pPredBufCol - pointer to the coefficient column buffer; must be aligned 41 * on a 4-byte boundary. 42 * curQP - quantization parameter of the current block. curQP may equal to 43 * predQP especially when the current block and the predictor block 44 * are in the same macroblock. 45 * predQP - quantization parameter of the predictor block 46 * predDir - indicates the prediction direction which takes one of the 47 * following values: OMX_VC_HORIZONTAL - predict horizontally 48 * OMX_VC_VERTICAL - predict vertically 49 * ACPredFlag - a flag indicating if AC prediction should be performed. It 50 * is equal to ac_pred_flag in the bit stream syntax of MPEG-4 51 * videoComp - video component type (luminance or chrominance) of the 52 * current block 53 * 54 * Output Arguments: 55 * 56 * pSrcDst - pointer to the coefficient buffer which contains the quantized 57 * coefficients (QF) of the current block 58 * pPredBufRow - pointer to the updated coefficient row buffer 59 * pPredBufCol - pointer to the updated coefficient column buffer Note: 60 * Buffer update: Update the AC prediction buffer (both row and 61 * column buffer). 62 * 63 * Return Value: 64 * 65 * OMX_Sts_NoErr - no error 66 * OMX_Sts_BadArgErr - bad arguments, if: 67 * - At least one of the pointers is NULL: 68 * pSrcDst, pPredBufRow, or pPredBufCol. 69 * - curQP <= 0, 70 * - predQP <= 0, 71 * - curQP >31, 72 * - predQP > 31, 73 * - preDir exceeds [1,2] 74 * - pSrcDst, pPredBufRow, or pPredBufCol is not 4-byte aligned. 75 * 76 */ 77 78 OMXResult omxVCM4P2_PredictReconCoefIntra( 79 OMX_S16 * pSrcDst, 80 OMX_S16 * pPredBufRow, 81 OMX_S16 * pPredBufCol, 82 OMX_INT curQP, 83 OMX_INT predQP, 84 OMX_INT predDir, 85 OMX_INT ACPredFlag, 86 OMXVCM4P2VideoComponent videoComp 87 ) 88 { 89 OMX_U8 flag; 90 /* Argument error checks */ 91 armRetArgErrIf(pSrcDst == NULL, OMX_Sts_BadArgErr); 92 armRetArgErrIf(pPredBufRow == NULL, OMX_Sts_BadArgErr); 93 armRetArgErrIf(pPredBufCol == NULL, OMX_Sts_BadArgErr); 94 armRetArgErrIf(curQP <= 0, OMX_Sts_BadArgErr); 95 armRetArgErrIf(predQP <= 0, OMX_Sts_BadArgErr); 96 armRetArgErrIf(curQP > 31, OMX_Sts_BadArgErr); 97 armRetArgErrIf(predQP > 31, OMX_Sts_BadArgErr); 98 armRetArgErrIf((predDir != 1) && (predDir != 2), OMX_Sts_BadArgErr); 99 armRetArgErrIf(!armIs4ByteAligned(pSrcDst), OMX_Sts_BadArgErr); 100 armRetArgErrIf(!armIs4ByteAligned(pPredBufRow), OMX_Sts_BadArgErr); 101 armRetArgErrIf(!armIs4ByteAligned(pPredBufCol), OMX_Sts_BadArgErr); 102 103 flag = 0; 104 return armVCM4P2_ACDCPredict( 105 pSrcDst, 106 NULL, 107 pPredBufRow, 108 pPredBufCol, 109 curQP, 110 predQP, 111 predDir, 112 ACPredFlag, 113 videoComp, 114 flag, 115 NULL); 116 117 } 118 119 /* End of file */ 120 121 122
