1 /** 2 * 3 * File Name: armVCM4P10_Interpolate_Luma.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 * Description: 12 * This function will calculate interpolation for luma components 13 * 14 */ 15 16 #include "omxtypes.h" 17 #include "armOMX.h" 18 #include "omxVC.h" 19 20 #include "armCOMM.h" 21 #include "armVC.h" 22 23 /** 24 * Function: armM4P10_Copy 25 * 26 * Description: 27 * This function performs copy a block of data from source to destination 28 * 29 * Remarks: 30 * 31 * [in] pSrc Pointer to top-left corner of block 32 * [in] iSrcStep Step of the source buffer. 33 * [in] iDstStep Step of the destination buffer. 34 * [in] iWidth Width of the current block 35 * [in] iHeight Height of the current block 36 * [out] pDst Pointer to the interpolation buffer 37 * 38 * Return Value: 39 * Standard OMXResult value. 40 * 41 */ 42 static OMXResult armM4P10_Copy( 43 const OMX_U8* pSrc, 44 OMX_U32 iSrcStep, 45 OMX_U8* pDst, 46 OMX_U32 iDstStep, 47 OMX_U32 iWidth, 48 OMX_U32 iHeight 49 ) 50 { 51 OMX_U32 x, y; 52 53 for (y = 0; y < iHeight; y++) 54 { 55 for (x = 0; x < iWidth; x++) 56 { 57 pDst [y * iDstStep + x] = pSrc [y * iSrcStep + x]; 58 } 59 } 60 61 return OMX_Sts_NoErr; 62 } 63 64 /** 65 * Function: armVCM4P10_Interpolate_Luma 66 * 67 * Description: 68 * This function performs interpolation for luma components. 69 * 70 * Remarks: 71 * 72 * [in] pSrc Pointer to top-left corner of block used to 73 * interpolate in the reconstructed frame plane 74 * [in] iSrcStep Step of the source buffer. 75 * [in] iDstStep Step of the destination(interpolation) buffer. 76 * [in] iWidth Width of the current block 77 * [in] iHeight Height of the current block 78 * [in] dx Fractional part of horizontal motion vector 79 * component in 1/4 pixel unit (0~3) 80 * [in] dy Fractional part of vertical motion vector 81 * component in 1/4 pixel unit (0~3) 82 * [out] pDst Pointer to the interpolation buffer 83 * 84 * Return Value: 85 * Standard OMXResult value. 86 * 87 */ 88 89 OMXResult armVCM4P10_Interpolate_Luma( 90 const OMX_U8 *pSrc, 91 OMX_U32 iSrcStep, 92 OMX_U8 *pDst, 93 OMX_U32 iDstStep, 94 OMX_U32 iWidth, 95 OMX_U32 iHeight, 96 OMX_U32 dx, 97 OMX_U32 dy 98 ) 99 { 100 OMX_U8 pBuf1 [16*16]; 101 const OMX_U8 *pSrcHalfHor = pSrc; 102 const OMX_U8 *pSrcHalfVer = pSrc; 103 104 /* check for argument error */ 105 armRetArgErrIf(pSrc == NULL, OMX_Sts_BadArgErr) 106 armRetArgErrIf(pDst == NULL, OMX_Sts_BadArgErr) 107 armRetArgErrIf(dx > 3, OMX_Sts_BadArgErr) 108 armRetArgErrIf(dy > 3, OMX_Sts_BadArgErr) 109 110 /* Work out positions for half pixel interpolation */ 111 if (dx == 3) 112 { 113 pSrcHalfVer += 1; 114 } 115 if (dy == 3) 116 { 117 pSrcHalfHor += iSrcStep; 118 } 119 120 /* Switch on type of pixel 121 * Pixels are named 'a' to 's' as in the H.264 standard 122 */ 123 if (dx == 0 && dy == 0) 124 { 125 /* G */ 126 armM4P10_Copy(pSrc, iSrcStep, pDst, iDstStep, iWidth, iHeight); 127 } 128 else if (dy == 0) 129 { 130 /* a, b, c */ 131 armVCM4P10_InterpolateHalfHor_Luma 132 (pSrcHalfHor, iSrcStep, pDst, iDstStep, iWidth, iHeight); 133 134 if (dx == 1 || dx == 3) 135 { 136 armVCCOMM_Average 137 (pDst, pSrcHalfVer, iDstStep, iSrcStep, pDst, iDstStep, iWidth, iHeight); 138 } 139 } 140 else if (dx == 0) 141 { 142 /* d, h, n */ 143 armVCM4P10_InterpolateHalfVer_Luma 144 (pSrcHalfVer, iSrcStep, pDst, iDstStep, iWidth, iHeight); 145 146 if (dy == 1 || dy == 3) 147 { 148 armVCCOMM_Average 149 (pDst, pSrcHalfHor, iDstStep, iSrcStep, pDst, iDstStep, iWidth, iHeight); 150 } 151 } 152 else if (dx == 2 || dy == 2) 153 { 154 /* j */ 155 armVCM4P10_InterpolateHalfDiag_Luma 156 (pSrc, iSrcStep, pDst, iDstStep, iWidth, iHeight); 157 158 if (dx == 1 || dx == 3) 159 { 160 /* i, k */ 161 armVCM4P10_InterpolateHalfVer_Luma 162 (pSrcHalfVer, iSrcStep, pBuf1, iWidth, iWidth, iHeight); 163 164 armVCCOMM_Average 165 (pDst, pBuf1, iDstStep, iWidth, pDst, iDstStep, iWidth, iHeight); 166 } 167 if (dy == 1 || dy == 3) 168 { 169 /* f,q */ 170 armVCM4P10_InterpolateHalfHor_Luma 171 (pSrcHalfHor, iSrcStep, pBuf1, iWidth, iWidth, iHeight); 172 173 armVCCOMM_Average 174 (pDst, pBuf1, iDstStep, iWidth, pDst, iDstStep, iWidth, iHeight); 175 } 176 } 177 else /* dx=1,3 and dy=1,3 */ 178 { 179 /* e, g, p, r */ 180 armVCM4P10_InterpolateHalfHor_Luma 181 (pSrcHalfHor, iSrcStep, pBuf1, iWidth, iWidth, iHeight); 182 183 armVCM4P10_InterpolateHalfVer_Luma 184 (pSrcHalfVer, iSrcStep, pDst, iDstStep, iWidth, iHeight); 185 186 armVCCOMM_Average 187 (pBuf1, pDst, iWidth, iDstStep, pDst, iDstStep, iWidth, iHeight); 188 } 189 190 return OMX_Sts_NoErr; 191 } 192 193 /***************************************************************************** 194 * END OF FILE 195 *****************************************************************************/ 196
