Harish Mahendrakar | 0d8951c | 2014-05-16 10:31:13 -0700 | [diff] [blame^] | 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_iquant_recon.c |
| 22 | * |
| 23 | * @brief |
| 24 | * Contains function definitions for inverse quantization and |
| 25 | * reconstruction of chroma interleaved data. |
| 26 | * |
| 27 | * @author |
| 28 | * 100470 |
| 29 | * |
| 30 | * @par List of Functions: |
| 31 | * - ihevc_chroma_iquant_recon_4x4() |
| 32 | * - ihevc_chroma_iquant_recon_8x8() |
| 33 | * - ihevc_chroma_iquant_recon_16x16() |
| 34 | * |
| 35 | * @remarks |
| 36 | * None |
| 37 | * |
| 38 | ******************************************************************************* |
| 39 | */ |
| 40 | |
| 41 | #include <stdio.h> |
| 42 | #include <string.h> |
| 43 | #include "ihevc_typedefs.h" |
| 44 | #include "ihevc_macros.h" |
| 45 | #include "ihevc_platform_macros.h" |
| 46 | #include "ihevc_defs.h" |
| 47 | #include "ihevc_trans_tables.h" |
| 48 | #include "ihevc_chroma_iquant_recon.h" |
| 49 | #include "ihevc_func_selector.h" |
| 50 | #include "ihevc_trans_macros.h" |
| 51 | |
| 52 | /* All the functions work one component(U or V) of interleaved data depending upon pointers passed to it */ |
| 53 | /* Data visualization */ |
| 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 | /* U V U V U V U V */ |
| 58 | /* If the pointer points to first byte of above stream (U) , functions will operate on U component */ |
| 59 | /* If the pointer points to second byte of above stream (V) , functions will operate on V component */ |
| 60 | |
| 61 | /** |
| 62 | ******************************************************************************* |
| 63 | * |
| 64 | * @brief |
| 65 | * This function performs inverse quantization and reconstruction for 4x4 |
| 66 | * input block |
| 67 | * |
| 68 | * @par Description: |
| 69 | * This function performs inverse quantization and reconstruction for 4x4 |
| 70 | * input block |
| 71 | * |
| 72 | * @param[in] pi2_src |
| 73 | * Input 4x4 coefficients |
| 74 | * |
| 75 | * @param[in] pu1_pred |
| 76 | * Prediction 4x4 block |
| 77 | * |
| 78 | * @param[in] pi2_dequant_coeff |
| 79 | * Dequant Coeffs |
| 80 | * |
| 81 | * @param[out] pu1_dst |
| 82 | * Output 4x4 block |
| 83 | * |
| 84 | * @param[in] qp_div |
| 85 | * Quantization parameter / 6 |
| 86 | * |
| 87 | * @param[in] qp_rem |
| 88 | * Quantization parameter % 6 |
| 89 | * |
| 90 | * @param[in] src_strd |
| 91 | * Input stride |
| 92 | * |
| 93 | * @param[in] pred_strd |
| 94 | * Prediction stride |
| 95 | * |
| 96 | * @param[in] dst_strd |
| 97 | * Output Stride |
| 98 | * |
| 99 | * @param[in] zero_cols |
| 100 | * Zero columns in pi2_src |
| 101 | * |
| 102 | * @returns Void |
| 103 | * |
| 104 | * @remarks |
| 105 | * None |
| 106 | * |
| 107 | ******************************************************************************* |
| 108 | */ |
| 109 | |
| 110 | |
| 111 | void ihevc_chroma_iquant_recon_4x4(WORD16 *pi2_src, |
| 112 | UWORD8 *pu1_pred, |
| 113 | WORD16 *pi2_dequant_coeff, |
| 114 | UWORD8 *pu1_dst, |
| 115 | WORD32 qp_div, /* qpscaled / 6 */ |
| 116 | WORD32 qp_rem, /* qpscaled % 6 */ |
| 117 | WORD32 src_strd, |
| 118 | WORD32 pred_strd, |
| 119 | WORD32 dst_strd, |
| 120 | WORD32 zero_cols) |
| 121 | { |
| 122 | |
| 123 | { |
| 124 | /* Inverse Quant and recon */ |
| 125 | { |
| 126 | WORD32 i, j; |
| 127 | WORD32 shift_iq; |
| 128 | WORD32 trans_size; |
| 129 | /* Inverse Quantization constants */ |
| 130 | { |
| 131 | WORD32 log2_trans_size, bit_depth; |
| 132 | |
| 133 | log2_trans_size = 2; |
| 134 | bit_depth = 8 + 0; |
| 135 | shift_iq = bit_depth + log2_trans_size - 5; |
| 136 | } |
| 137 | |
| 138 | trans_size = TRANS_SIZE_4; |
| 139 | |
| 140 | for(i = 0; i < trans_size; i++) |
| 141 | { |
| 142 | /* Checking for Zero Cols */ |
| 143 | if((zero_cols & 1) == 1) |
| 144 | { |
| 145 | for(j = 0; j < trans_size; j++) |
| 146 | pu1_dst[j * dst_strd] = pu1_pred[j * pred_strd]; |
| 147 | } |
| 148 | else |
| 149 | { |
| 150 | for(j = 0; j < trans_size; j++) |
| 151 | { |
| 152 | WORD32 iquant_out; |
| 153 | IQUANT_4x4(iquant_out, |
| 154 | pi2_src[j * src_strd], |
| 155 | pi2_dequant_coeff[j * trans_size] * g_ihevc_iquant_scales[qp_rem], |
| 156 | shift_iq, qp_div); |
| 157 | iquant_out = (iquant_out + 16) >> 5; |
| 158 | pu1_dst[j * dst_strd] = |
| 159 | CLIP_U8(iquant_out + pu1_pred[j * pred_strd]); |
| 160 | } |
| 161 | } |
| 162 | pi2_src++; |
| 163 | pi2_dequant_coeff++; |
| 164 | pu1_pred += 2; |
| 165 | pu1_dst += 2; |
| 166 | |
| 167 | zero_cols = zero_cols >> 1; |
| 168 | } |
| 169 | } |
| 170 | } |
| 171 | } |
| 172 | |
| 173 | /** |
| 174 | ******************************************************************************* |
| 175 | * |
| 176 | * @brief |
| 177 | * This function performs inverse quantization and reconstruction for 8x8 |
| 178 | * input block |
| 179 | * |
| 180 | * @par Description: |
| 181 | * This function performs inverse quantization and reconstruction for 8x8 |
| 182 | * input block |
| 183 | * |
| 184 | * @param[in] pi2_src |
| 185 | * Input 8x8 coefficients |
| 186 | * |
| 187 | * @param[in] pu1_pred |
| 188 | * Prediction 8x8 block |
| 189 | * |
| 190 | * @param[in] pi2_dequant_coeff |
| 191 | * Dequant Coeffs |
| 192 | * |
| 193 | * @param[out] pu1_dst |
| 194 | * Output 8x8 block |
| 195 | * |
| 196 | * @param[in] qp_div |
| 197 | * Quantization parameter / 6 |
| 198 | * |
| 199 | * @param[in] qp_rem |
| 200 | * Quantization parameter % 6 |
| 201 | * |
| 202 | * @param[in] src_strd |
| 203 | * Input stride |
| 204 | * |
| 205 | * @param[in] pred_strd |
| 206 | * Prediction stride |
| 207 | * |
| 208 | * @param[in] dst_strd |
| 209 | * Output Stride |
| 210 | * |
| 211 | * @param[in] zero_cols |
| 212 | * Zero columns in pi2_src |
| 213 | * |
| 214 | * @returns Void |
| 215 | * |
| 216 | * @remarks |
| 217 | * None |
| 218 | * |
| 219 | ******************************************************************************* |
| 220 | */ |
| 221 | |
| 222 | |
| 223 | void ihevc_chroma_iquant_recon_8x8(WORD16 *pi2_src, |
| 224 | UWORD8 *pu1_pred, |
| 225 | WORD16 *pi2_dequant_coeff, |
| 226 | UWORD8 *pu1_dst, |
| 227 | WORD32 qp_div, /* qpscaled / 6 */ |
| 228 | WORD32 qp_rem, /* qpscaled % 6 */ |
| 229 | WORD32 src_strd, |
| 230 | WORD32 pred_strd, |
| 231 | WORD32 dst_strd, |
| 232 | WORD32 zero_cols) |
| 233 | { |
| 234 | |
| 235 | { |
| 236 | /* Inverse Quant and recon */ |
| 237 | { |
| 238 | WORD32 i, j; |
| 239 | WORD32 shift_iq; |
| 240 | WORD32 trans_size; |
| 241 | /* Inverse Quantization constants */ |
| 242 | { |
| 243 | WORD32 log2_trans_size, bit_depth; |
| 244 | |
| 245 | log2_trans_size = 3; |
| 246 | bit_depth = 8 + 0; |
| 247 | shift_iq = bit_depth + log2_trans_size - 5; |
| 248 | } |
| 249 | |
| 250 | trans_size = TRANS_SIZE_8; |
| 251 | |
| 252 | for(i = 0; i < trans_size; i++) |
| 253 | { |
| 254 | /* Checking for Zero Cols */ |
| 255 | if((zero_cols & 1) == 1) |
| 256 | { |
| 257 | for(j = 0; j < trans_size; j++) |
| 258 | pu1_dst[j * dst_strd] = pu1_pred[j * pred_strd]; |
| 259 | } |
| 260 | else |
| 261 | { |
| 262 | for(j = 0; j < trans_size; j++) |
| 263 | { |
| 264 | WORD32 iquant_out; |
| 265 | IQUANT(iquant_out, |
| 266 | pi2_src[j * src_strd], |
| 267 | pi2_dequant_coeff[j * trans_size] * g_ihevc_iquant_scales[qp_rem], |
| 268 | shift_iq, qp_div); |
| 269 | iquant_out = (iquant_out + 16) >> 5; |
| 270 | pu1_dst[j * dst_strd] = |
| 271 | CLIP_U8(iquant_out + pu1_pred[j * pred_strd]); |
| 272 | } |
| 273 | } |
| 274 | pi2_src++; |
| 275 | pi2_dequant_coeff++; |
| 276 | pu1_pred += 2; |
| 277 | pu1_dst += 2; |
| 278 | |
| 279 | zero_cols = zero_cols >> 1; |
| 280 | } |
| 281 | } |
| 282 | } |
| 283 | } |
| 284 | |
| 285 | /** |
| 286 | ******************************************************************************* |
| 287 | * |
| 288 | * @brief |
| 289 | * This function performs inverse quantization and reconstruction for 16x16 |
| 290 | * input block |
| 291 | * |
| 292 | * @par Description: |
| 293 | * This function performs inverse quantization and reconstruction for 16x16 |
| 294 | * input block |
| 295 | * |
| 296 | * @param[in] pi2_src |
| 297 | * Input 16x16 coefficients |
| 298 | * |
| 299 | * @param[in] pu1_pred |
| 300 | * Prediction 16x16 block |
| 301 | * |
| 302 | * @param[in] pi2_dequant_coeff |
| 303 | * Dequant Coeffs |
| 304 | * |
| 305 | * @param[out] pu1_dst |
| 306 | * Output 16x16 block |
| 307 | * |
| 308 | * @param[in] qp_div |
| 309 | * Quantization parameter / 6 |
| 310 | * |
| 311 | * @param[in] qp_rem |
| 312 | * Quantization parameter % 6 |
| 313 | * |
| 314 | * @param[in] src_strd |
| 315 | * Input stride |
| 316 | * |
| 317 | * @param[in] pred_strd |
| 318 | * Prediction stride |
| 319 | * |
| 320 | * @param[in] dst_strd |
| 321 | * Output Stride |
| 322 | * |
| 323 | * @param[in] zero_cols |
| 324 | * Zero columns in pi2_src |
| 325 | * |
| 326 | * @returns Void |
| 327 | * |
| 328 | * @remarks |
| 329 | * None |
| 330 | * |
| 331 | ******************************************************************************* |
| 332 | */ |
| 333 | |
| 334 | |
| 335 | void ihevc_chroma_iquant_recon_16x16(WORD16 *pi2_src, |
| 336 | UWORD8 *pu1_pred, |
| 337 | WORD16 *pi2_dequant_coeff, |
| 338 | UWORD8 *pu1_dst, |
| 339 | WORD32 qp_div, /* qpscaled / 6 */ |
| 340 | WORD32 qp_rem, /* qpscaled % 6 */ |
| 341 | WORD32 src_strd, |
| 342 | WORD32 pred_strd, |
| 343 | WORD32 dst_strd, |
| 344 | WORD32 zero_cols) |
| 345 | |
| 346 | { |
| 347 | |
| 348 | { |
| 349 | /* Inverse Quant and recon */ |
| 350 | { |
| 351 | WORD32 i, j; |
| 352 | WORD32 shift_iq; |
| 353 | WORD32 trans_size; |
| 354 | /* Inverse Quantization constants */ |
| 355 | { |
| 356 | WORD32 log2_trans_size, bit_depth; |
| 357 | |
| 358 | log2_trans_size = 4; |
| 359 | bit_depth = 8 + 0; |
| 360 | shift_iq = bit_depth + log2_trans_size - 5; |
| 361 | } |
| 362 | |
| 363 | trans_size = TRANS_SIZE_16; |
| 364 | |
| 365 | for(i = 0; i < trans_size; i++) |
| 366 | { |
| 367 | /* Checking for Zero Cols */ |
| 368 | if((zero_cols & 1) == 1) |
| 369 | { |
| 370 | for(j = 0; j < trans_size; j++) |
| 371 | pu1_dst[j * dst_strd] = pu1_pred[j * pred_strd]; |
| 372 | } |
| 373 | else |
| 374 | { |
| 375 | for(j = 0; j < trans_size; j++) |
| 376 | { |
| 377 | WORD32 iquant_out; |
| 378 | IQUANT(iquant_out, |
| 379 | pi2_src[j * src_strd], |
| 380 | pi2_dequant_coeff[j * trans_size] * g_ihevc_iquant_scales[qp_rem], |
| 381 | shift_iq, qp_div); |
| 382 | iquant_out = (iquant_out + 16) >> 5; |
| 383 | pu1_dst[j * dst_strd] = |
| 384 | CLIP_U8(iquant_out + pu1_pred[j * pred_strd]); |
| 385 | } |
| 386 | } |
| 387 | pi2_src++; |
| 388 | pi2_dequant_coeff++; |
| 389 | pu1_pred += 2; |
| 390 | pu1_dst += 2; |
| 391 | |
| 392 | zero_cols = zero_cols >> 1; |
| 393 | } |
| 394 | } |
| 395 | } |
| 396 | } |
| 397 | |
| 398 | |