1 /* ---------------------------------------------------------------- 2 * 3 * 4 * File Name: omxVCM4P10_FilterDeblockingChroma_VerEdge_I.c 5 * OpenMAX DL: v1.0.2 6 * Revision: 9641 7 * Date: Thursday, February 7, 2008 8 * 9 * (c) Copyright 2007-2008 ARM Limited. All Rights Reserved. 10 * 11 * 12 * 13 * H.264 deblocking module 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: omxVCM4P10_FilterDeblockingChroma_VerEdge_I (6.3.3.3.3) 26 * 27 * Description: 28 * Performs in-place deblock filtering on four vertical edges of the chroma 29 * macroblock (8x8). 30 * 31 * Input Arguments: 32 * 33 * pSrcDst - Pointer to the input macroblock; must be 8-byte aligned. 34 * srcdstStep - Step of the arrays; must be a multiple of 8. 35 * pAlpha - Array of size 2 of alpha thresholds (the first item is alpha 36 * threshold for external vertical edge, and the second item is for 37 * internal vertical edge); per [ISO14496-10] alpha values must be 38 * in the range [0,255]. 39 * pBeta - Array of size 2 of beta thresholds (the first item is the beta 40 * threshold for the external vertical edge, and the second item is 41 * for the internal vertical edge); per [ISO14496-10] beta values 42 * must be in the range [0,18]. 43 * pThresholds - Array of size 8 containing thresholds, TC0, for the left 44 * vertical edge of each 4x2 chroma block, arranged in vertical 45 * block order; must be aligned on a 4-byte boundary. Per 46 * [ISO14496-10] values must be in the range [0,25]. 47 * pBS - Array of size 16 of BS parameters (values for each 2x2 chroma 48 * block, arranged in vertical block order). This parameter is the 49 * same as the pBSparameter passed into FilterDeblockLuma_VerEdge; 50 * valid in the range [0,4] with the following restrictions: i) 51 * pBS[i]== 4 may occur only for 0<=i<=3, ii) pBS[i]== 4 if and 52 * only if pBS[i^3]== 4. Must be 4 byte aligned. 53 * 54 * Output Arguments: 55 * 56 * pSrcDst -Pointer to filtered output macroblock. 57 * 58 * Return Value: 59 * 60 * OMX_Sts_NoErr, if the function runs without error. 61 * 62 * OMX_Sts_BadArgErr - bad arguments: if one of the following cases occurs: 63 * - one or more of the following pointers is NULL: pSrcDst, pAlpha, 64 * pBeta, pThresholds, or pBS. 65 * - pSrcDst is not 8-byte aligned. 66 * - srcdstStep is not a multiple of 8. 67 * - pThresholds is not 4-byte aligned. 68 * - pAlpha[0] and/or pAlpha[1] is outside the range [0,255]. 69 * - pBeta[0] and/or pBeta[1] is outside the range [0,18]. 70 * - One or more entries in the table pThresholds[0..7] is outside 71 * of the range [0,25]. 72 * - pBS is out of range, i.e., one of the following conditions is true: 73 * pBS[i]<0, pBS[i]>4, pBS[i]==4 for i>=4, or 74 * (pBS[i]==4 && pBS[i^3]!=4) for 0<=i<=3. 75 * - pBS is not 4-byte aligned. 76 * 77 */ 78 79 OMXResult omxVCM4P10_FilterDeblockingChroma_VerEdge_I( 80 OMX_U8* pSrcDst, 81 OMX_S32 srcdstStep, 82 const OMX_U8* pAlpha, 83 const OMX_U8* pBeta, 84 const OMX_U8* pThresholds, 85 const OMX_U8 *pBS 86 ) 87 { 88 int I, X, Y, Internal=0; 89 90 armRetArgErrIf(pSrcDst == NULL, OMX_Sts_BadArgErr); 91 armRetArgErrIf(armNot8ByteAligned(pSrcDst), OMX_Sts_BadArgErr); 92 armRetArgErrIf(srcdstStep & 7, OMX_Sts_BadArgErr); 93 armRetArgErrIf(pAlpha == NULL, OMX_Sts_BadArgErr); 94 armRetArgErrIf(pBeta == NULL, OMX_Sts_BadArgErr); 95 armRetArgErrIf(pThresholds == NULL, OMX_Sts_BadArgErr); 96 armRetArgErrIf(armNot4ByteAligned(pThresholds), OMX_Sts_BadArgErr); 97 armRetArgErrIf(pBS == NULL, OMX_Sts_BadArgErr); 98 armRetArgErrIf(armNot4ByteAligned(pBS), OMX_Sts_BadArgErr); 99 armRetArgErrIf(pBeta[0] > 18, OMX_Sts_BadArgErr); 100 armRetArgErrIf(pBeta[1] > 18, OMX_Sts_BadArgErr); 101 102 for (X=0; X<8; X+=4, Internal=1) 103 { 104 for (Y=0; Y<8; Y++) 105 { 106 I = (Y>>1)+4*(X>>1); 107 108 armRetArgErrIf(pBS[I] > 4, OMX_Sts_BadArgErr); 109 110 armRetArgErrIf( (I > 3) && (pBS[I] == 4), 111 OMX_Sts_BadArgErr); 112 113 armRetArgErrIf( ( (pBS[I] == 4) && (pBS[I^3] != 4) ), 114 OMX_Sts_BadArgErr); 115 armRetArgErrIf(pThresholds[Y] > 25, OMX_Sts_BadArgErr); 116 117 118 /* Filter vertical edge with q0 at (X,Y) */ 119 armVCM4P10_DeBlockPixel( 120 pSrcDst + Y*srcdstStep + X, 121 1, 122 pThresholds[(Y>>1)+4*(X>>2)], 123 pAlpha[Internal], 124 pBeta[Internal], 125 pBS[I], 126 1); 127 } 128 } 129 130 return OMX_Sts_NoErr; 131 } 132
