1 /****************************************************************************** 2 * 3 * Copyright (C) 2012 Ittiam Systems Pvt Ltd, Bangalore 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at: 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 ******************************************************************************/ 18 /** 19 ******************************************************************************* 20 * @file 21 * ihevc_chroma_recon.c 22 * 23 * @brief 24 * Functions definitions reconstruction of chroma interleaved data. 25 * 26 * @author 27 * 100470 28 * 29 * @par List of Functions: 30 * - ihevc_chroma_recon_4x4() 31 * - ihevc_chroma_recon_8x8() 32 * - ihevc_chroma_recon_16x16() 33 * 34 * @remarks 35 * None 36 * 37 ******************************************************************************* 38 */ 39 40 #include <stdio.h> 41 #include <string.h> 42 #include "ihevc_typedefs.h" 43 #include "ihevc_macros.h" 44 #include "ihevc_platform_macros.h" 45 #include "ihevc_defs.h" 46 #include "ihevc_trans_tables.h" 47 #include "ihevc_chroma_recon.h" 48 #include "ihevc_func_selector.h" 49 #include "ihevc_trans_macros.h" 50 51 /* All the functions work one component(U or V) of interleaved data depending upon pointers passed to it */ 52 /* Data visualization */ 53 /* U V U V U V U V */ 54 /* U V U V U V U V */ 55 /* U V U V U V U V */ 56 /* U V U V U V U V */ 57 /* If the pointer points to first byte of above stream (U) , functions will operate on U component */ 58 /* If the pointer points to second byte of above stream (V) , functions will operate on V component */ 59 60 /** 61 ******************************************************************************* 62 * 63 * @brief 64 * This function performs reconstruction for 4x4 input block 65 * 66 * @par Description: 67 * Performs reconstruction of 4x4 input block by adding adding prediction 68 * data to input and clipping it to 8 bit 69 * 70 * @param[in] pi2_src 71 * Input 4x4 coefficients 72 * 73 * @param[in] pu1_pred 74 * Prediction 4x4 block 75 * 76 * @param[out] pu1_dst 77 * Output 4x4 block 78 * 79 * @param[in] src_strd 80 * Input stride 81 * 82 * @param[in] pred_strd 83 * Prediction stride 84 * 85 * @param[in] dst_strd 86 * Output Stride 87 * 88 * @param[in] shift 89 * Output shift 90 * 91 * @param[in] zero_cols 92 * Zero columns in pi2_tmp 93 * 94 * @returns Void 95 * 96 * @remarks 97 * None 98 * 99 ******************************************************************************* 100 */ 101 102 103 void ihevc_chroma_recon_4x4(WORD16 *pi2_src, 104 UWORD8 *pu1_pred, 105 UWORD8 *pu1_dst, 106 WORD32 src_strd, 107 WORD32 pred_strd, 108 WORD32 dst_strd, 109 WORD32 zero_cols) 110 { 111 WORD32 i, j; 112 WORD32 trans_size; 113 114 trans_size = TRANS_SIZE_4; 115 116 /* Reconstruction */ 117 118 for(i = 0; i < trans_size; i++) 119 { 120 /* Checking for Zero Cols */ 121 if((zero_cols & 1) == 1) 122 { 123 for(j = 0; j < trans_size; j++) 124 { 125 pu1_dst[j * dst_strd] = pu1_pred[j * pred_strd]; 126 } 127 } 128 else 129 { 130 for(j = 0; j < trans_size; j++) 131 { 132 pu1_dst[j * dst_strd] = 133 CLIP_U8(pi2_src[j * src_strd] + pu1_pred[j * pred_strd]); 134 } 135 } 136 pi2_src++; 137 pu1_dst += 2; 138 pu1_pred += 2; 139 zero_cols = zero_cols >> 1; 140 } 141 } 142 143 /** 144 ******************************************************************************* 145 * 146 * @brief 147 * This function performs reconstruction for 8x8 input block 148 * 149 * @par Description: 150 * Performs reconstruction of 8x8 input block by adding adding prediction 151 * data to input and clipping it to 8 bit 152 * 153 * @param[in] pi2_src 154 * Input 8x8 coefficients 155 * 156 * @param[in] pu1_pred 157 * Prediction 8x8 block 158 * 159 * @param[out] pu1_dst 160 * Output 8x8 block 161 * 162 * @param[in] src_strd 163 * Input stride 164 * 165 * @param[in] pred_strd 166 * Prediction stride 167 * 168 * @param[in] dst_strd 169 * Output Stride 170 * 171 * @param[in] shift 172 * Output shift 173 * 174 * @param[in] zero_cols 175 * Zero columns in pi2_tmp 176 * 177 * @returns Void 178 * 179 * @remarks 180 * None 181 * 182 ******************************************************************************* 183 */ 184 185 186 void ihevc_chroma_recon_8x8(WORD16 *pi2_src, 187 UWORD8 *pu1_pred, 188 UWORD8 *pu1_dst, 189 WORD32 src_strd, 190 WORD32 pred_strd, 191 WORD32 dst_strd, 192 WORD32 zero_cols) 193 { 194 WORD32 i, j; 195 WORD32 trans_size; 196 197 trans_size = TRANS_SIZE_8; 198 199 /* Reconstruction */ 200 201 for(i = 0; i < trans_size; i++) 202 { 203 /* Checking for Zero Cols */ 204 if((zero_cols & 1) == 1) 205 { 206 for(j = 0; j < trans_size; j++) 207 { 208 pu1_dst[j * dst_strd] = pu1_pred[j * pred_strd]; 209 } 210 } 211 else 212 { 213 for(j = 0; j < trans_size; j++) 214 { 215 pu1_dst[j * dst_strd] = 216 CLIP_U8(pi2_src[j * src_strd] + pu1_pred[j * pred_strd]); 217 } 218 } 219 pi2_src++; 220 pu1_dst += 2; 221 pu1_pred += 2; 222 zero_cols = zero_cols >> 1; 223 } 224 } 225 226 /** 227 ******************************************************************************* 228 * 229 * @brief 230 * This function performs reconstruction for 16x16 input block 231 * 232 * @par Description: 233 * Performs reconstruction of 16x16 input block by adding adding prediction 234 * data to input and clipping it to 8 bit 235 * 236 * @param[in] pi2_src 237 * Input 16x16 coefficients 238 * 239 * @param[in] pu1_pred 240 * Prediction 16x16 block 241 * 242 * @param[out] pu1_dst 243 * Output 16x16 block 244 * 245 * @param[in] src_strd 246 * Input stride 247 * 248 * @param[in] pred_strd 249 * Prediction stride 250 * 251 * @param[in] dst_strd 252 * Output Stride 253 * 254 * @param[in] shift 255 * Output shift 256 * 257 * @param[in] zero_cols 258 * Zero columns in pi2_tmp 259 * 260 * @returns Void 261 * 262 * @remarks 263 * None 264 * 265 ******************************************************************************* 266 */ 267 268 269 void ihevc_chroma_recon_16x16(WORD16 *pi2_src, 270 UWORD8 *pu1_pred, 271 UWORD8 *pu1_dst, 272 WORD32 src_strd, 273 WORD32 pred_strd, 274 WORD32 dst_strd, 275 WORD32 zero_cols) 276 { 277 WORD32 i, j; 278 WORD32 trans_size; 279 280 trans_size = TRANS_SIZE_16; 281 282 /* Reconstruction */ 283 284 for(i = 0; i < trans_size; i++) 285 { 286 /* Checking for Zero Cols */ 287 if((zero_cols & 1) == 1) 288 { 289 for(j = 0; j < trans_size; j++) 290 { 291 pu1_dst[j * dst_strd] = pu1_pred[j * pred_strd]; 292 } 293 } 294 else 295 { 296 for(j = 0; j < trans_size; j++) 297 { 298 pu1_dst[j * dst_strd] = 299 CLIP_U8(pi2_src[j * src_strd] + pu1_pred[j * pred_strd]); 300 } 301 } 302 pi2_src++; 303 pu1_dst += 2; 304 pu1_pred += 2; 305 zero_cols = zero_cols >> 1; 306 } 307 } 308 309
