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_intra_pred_filters.c |
| 22 | * |
| 23 | * @brief |
| 24 | * Contains function Definition for intra prediction interpolation filters |
| 25 | * |
| 26 | * |
| 27 | * @author |
| 28 | * Ittiam |
| 29 | * |
| 30 | * @par List of Functions: |
| 31 | * ihevc_intra_pred_chroma_planar() |
| 32 | * |
| 33 | * ihevc_intra_pred_chroma_dc() |
| 34 | * |
| 35 | * ihevc_intra_pred_chroma_horz() |
| 36 | * |
| 37 | * ihevc_intra_pred_chroma_ver() |
| 38 | * |
| 39 | * ihevc_intra_pred_chroma_mode2() |
| 40 | * |
| 41 | * ihevc_intra_pred_chroma_mode_18_34() |
| 42 | * |
| 43 | * ihevc_intra_pred_chroma_mode_3_to_9() |
| 44 | * |
| 45 | * ihevc_intra_pred_chroma_mode_11_to_17() |
| 46 | * |
| 47 | * ihevc_intra_pred_chroma_mode_19_to_25() |
| 48 | * |
| 49 | * ihevc_intra_pred_chroma_mode_27_to_33() |
| 50 | * |
| 51 | * ihevc_intra_pred_chroma_ref_substitution() |
| 52 | * |
| 53 | * |
| 54 | * @remarks |
| 55 | * None |
| 56 | * |
| 57 | ******************************************************************************* |
| 58 | */ |
| 59 | |
| 60 | |
| 61 | /*****************************************************************************/ |
| 62 | /* File Includes */ |
| 63 | /*****************************************************************************/ |
| 64 | |
| 65 | #include "ihevc_typedefs.h" |
| 66 | #include "ihevc_macros.h" |
| 67 | #include "ihevc_func_selector.h" |
| 68 | #include "ihevc_platform_macros.h" |
| 69 | #include "ihevc_intra_pred.h" |
| 70 | #include "ihevc_mem_fns.h" |
| 71 | #include "ihevc_chroma_intra_pred.h" |
| 72 | #include "ihevc_common_tables.h" |
| 73 | |
| 74 | |
| 75 | /****************************************************************************/ |
| 76 | /* Constant Macros */ |
| 77 | /****************************************************************************/ |
| 78 | #define MAX_CU_SIZE 64 |
| 79 | #define BIT_DEPTH 8 |
| 80 | #define T32_4NT 128 |
| 81 | #define T16_4NT 64 |
| 82 | #define T16C_4NT 64 |
| 83 | #define T8C_4NT 32 |
| 84 | /****************************************************************************/ |
| 85 | /* Function Macros */ |
| 86 | /****************************************************************************/ |
| 87 | |
| 88 | #define GET_BIT(y,x) ((y) & (1 << x)) && (1 << x) |
| 89 | |
| 90 | |
| 91 | /*****************************************************************************/ |
| 92 | /* Function Definition */ |
| 93 | /*****************************************************************************/ |
| 94 | |
| 95 | /** |
| 96 | ******************************************************************************* |
| 97 | * |
| 98 | * @brief |
| 99 | * Reference substitution process for samples unavailable for prediction |
| 100 | * Refer to section 8.4.4.2.2 |
| 101 | * |
| 102 | * @par Description: |
| 103 | * |
| 104 | * |
| 105 | * @param[in] pu1_top_left |
| 106 | * UWORD8 pointer to the top-left |
| 107 | * |
| 108 | * @param[in] pu1_top |
| 109 | * UWORD8 pointer to the top |
| 110 | * |
| 111 | * @param[in] pu1_left |
| 112 | * UWORD8 pointer to the left |
| 113 | * |
| 114 | * @param[in] src_strd |
| 115 | * WORD32 Source stride |
| 116 | * |
| 117 | * @param[in] nbr_flags |
| 118 | * WORD32 neighbor availability flags |
| 119 | * |
| 120 | * @param[in] nt |
| 121 | * WORD32 transform Block size |
| 122 | * |
| 123 | * @param[in] dst_strd |
| 124 | * WORD32 Destination stride |
| 125 | * |
| 126 | * @returns |
| 127 | * |
| 128 | * @remarks |
| 129 | * None |
| 130 | * |
| 131 | ******************************************************************************* |
| 132 | */ |
| 133 | |
| 134 | |
| 135 | void ihevc_intra_pred_chroma_ref_substitution(UWORD8 *pu1_top_left, |
| 136 | UWORD8 *pu1_top, |
| 137 | UWORD8 *pu1_left, |
| 138 | WORD32 src_strd, |
| 139 | WORD32 nt, |
| 140 | WORD32 nbr_flags, |
| 141 | UWORD8 *pu1_dst, |
| 142 | WORD32 dst_strd) |
| 143 | { |
| 144 | UWORD8 pu1_ref_u, pu1_ref_v; |
| 145 | WORD32 dc_val, i, j; |
| 146 | WORD32 total_samples = (4 * nt) + 1; |
| 147 | WORD32 get_bits; |
| 148 | WORD32 next; |
| 149 | WORD32 bot_left, left, top, tp_right, tp_left; |
| 150 | WORD32 idx, nbr_id_from_bl, frwd_nbr_flag; |
| 151 | WORD32 a_nbr_flag[5]; |
| 152 | UNUSED(dst_strd); |
| 153 | /* Neighbor Flag Structure*/ |
| 154 | /* WORD32 nbr_flags MSB-->LSB TOP LEFT | TOP-RIGHT | TOP | LEFT | BOTTOM LEFT*/ |
| 155 | /* (1 bit) (4 bits) (4 bits) (4 bits) (4 bits) */ |
| 156 | |
| 157 | if(nbr_flags == 0) |
| 158 | { |
| 159 | /* If no neighbor flags are present, fill the neighbor samples with DC value */ |
| 160 | /*dc_val = 1 << (BIT_DEPTH - 1);*/ |
| 161 | dc_val = 1 << (8 - 1); |
| 162 | for(i = 0; i < (2 * total_samples); i++) |
| 163 | { |
| 164 | pu1_dst[i] = dc_val; |
| 165 | } |
| 166 | } |
| 167 | else |
| 168 | { |
| 169 | /* Else fill the corresponding samples */ |
| 170 | |
| 171 | /* Check for the neighbors availibility */ |
| 172 | tp_left = (nbr_flags & 0x10000); |
| 173 | tp_right = (nbr_flags & 0x0f000); |
| 174 | top = (nbr_flags & 0x00f00); |
| 175 | left = (nbr_flags & 0x000f0); |
| 176 | bot_left = (nbr_flags & 0x0000f); |
| 177 | |
| 178 | /* Fill nbrs depending on avalibility */ |
| 179 | /* Top -Left nbrs */ |
| 180 | if(0 != tp_left) |
| 181 | { |
| 182 | pu1_dst[(4 * nt)] = *pu1_top_left; // U top-left sample |
| 183 | pu1_dst[(4 * nt) + 1] = *(pu1_top_left + 1); // V top-left sample |
| 184 | } |
| 185 | /* Left nbrs */ |
| 186 | if(0 != left) |
| 187 | { |
| 188 | for(i = 0, j = 0; i < (2 * nt); i += 2) |
| 189 | { |
| 190 | pu1_dst[(4 * nt) - 2 - i] = pu1_left[j * src_strd]; // U left samples |
| 191 | pu1_dst[(4 * nt) - 1 - i] = pu1_left[(j * src_strd) + 1]; // V left samples |
| 192 | j++; |
| 193 | } |
| 194 | } |
| 195 | /* Bottom - Left nbrs */ |
| 196 | if(0 != bot_left) |
| 197 | { |
| 198 | for(i = (2 * nt), j = nt; i < (4 * nt); i += 2) |
| 199 | { |
| 200 | pu1_dst[(4 * nt) - 2 - i] = pu1_left[j * src_strd]; // U left samples |
| 201 | pu1_dst[(4 * nt) - 1 - i] = pu1_left[(j * src_strd) + 1]; // V left samples |
| 202 | j++; |
| 203 | } |
| 204 | } |
| 205 | /* Top nbrs */ |
| 206 | if(0 != top) |
| 207 | { |
| 208 | ihevc_memcpy_mul_8(&pu1_dst[(4 * nt) + 2], pu1_top, 2 * nt); |
| 209 | // U-V interleaved Top-top right samples |
| 210 | } |
| 211 | |
| 212 | /* Top - Right nbrs */ |
| 213 | if(0 != tp_right) |
| 214 | { |
| 215 | ihevc_memcpy_mul_8(&pu1_dst[(4 * nt) + 2 + 2 * nt], pu1_top + 2 * nt, 2 * nt); |
| 216 | // U-V interleaved Top-top right samples |
| 217 | } |
| 218 | |
| 219 | if(nt == 4) |
| 220 | { |
| 221 | /* 1 bit extraction for all the neighboring blocks */ |
| 222 | tp_left = (nbr_flags & 0x10000) >> 16; |
| 223 | bot_left = (nbr_flags & 0x8) >> 3; |
| 224 | left = (nbr_flags & 0x80) >> 7; |
| 225 | top = (nbr_flags & 0x100) >> 8; |
| 226 | tp_right = (nbr_flags & 0x1000) >> 12; |
| 227 | |
| 228 | next = 1; |
| 229 | a_nbr_flag[0] = bot_left; |
| 230 | a_nbr_flag[1] = left; |
| 231 | a_nbr_flag[2] = tp_left; |
| 232 | a_nbr_flag[3] = top; |
| 233 | a_nbr_flag[4] = tp_right; |
| 234 | |
| 235 | /* If bottom -left is not available, reverse substitution process*/ |
| 236 | if(bot_left == 0) |
| 237 | { |
| 238 | /* Check for the 1st available sample from bottom-left*/ |
| 239 | while(!a_nbr_flag[next]) |
| 240 | next++; |
| 241 | |
| 242 | /* If Left, top-left are available*/ |
| 243 | if(next <= 2) |
| 244 | { |
| 245 | UWORD16 *pu2_dst; |
| 246 | idx = (nt * next); |
| 247 | pu2_dst = (UWORD16 *)&pu1_dst[2 * idx]; |
| 248 | ihevc_memset_16bit((UWORD16 *)pu1_dst, pu2_dst[0], idx); |
| 249 | } |
| 250 | else /* If top, top-right are available */ |
| 251 | { |
| 252 | UWORD16 *pu2_dst; |
| 253 | /* Idx is changed to copy 1 pixel value for top-left ,if top-left is not available*/ |
| 254 | idx = (nt * (next - 1)) + 1; |
| 255 | pu2_dst = (UWORD16 *)&pu1_dst[2 * idx]; |
| 256 | ihevc_memset_16bit((UWORD16 *)pu1_dst, pu2_dst[0], idx); |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | if(left == 0) |
| 261 | { |
| 262 | UWORD16 *pu2_dst = (UWORD16 *)&pu1_dst[(2 * nt) - 2]; |
| 263 | ihevc_memset_16bit((UWORD16 *)&pu1_dst[(2 * nt)], pu2_dst[0], nt); |
| 264 | |
| 265 | |
| 266 | } |
| 267 | if(tp_left == 0) |
| 268 | { |
| 269 | pu1_dst[4 * nt] = pu1_dst[(4 * nt) - 2]; |
| 270 | pu1_dst[(4 * nt) + 1] = pu1_dst[(4 * nt) - 1]; |
| 271 | } |
| 272 | if(top == 0) |
| 273 | { |
| 274 | UWORD16 *pu2_dst = (UWORD16 *)&pu1_dst[(4 * nt)]; |
| 275 | ihevc_memset_16bit((UWORD16 *)&pu1_dst[(4 * nt) + 2], pu2_dst[0], nt); |
| 276 | |
| 277 | |
| 278 | } |
| 279 | if(tp_right == 0) |
| 280 | { |
| 281 | UWORD16 *pu2_dst = (UWORD16 *)&pu1_dst[(6 * nt)]; |
| 282 | ihevc_memset_16bit((UWORD16 *)&pu1_dst[(6 * nt) + 2], pu2_dst[0], nt); |
| 283 | |
| 284 | |
| 285 | } |
| 286 | } |
| 287 | else if(nt == 8) |
| 288 | { |
| 289 | WORD32 nbr_flags_temp = 0; |
| 290 | nbr_flags_temp = ((nbr_flags & 0xC) >> 2) + ((nbr_flags & 0xC0) >> 4) |
| 291 | + ((nbr_flags & 0x300) >> 4) |
| 292 | + ((nbr_flags & 0x3000) >> 6) |
| 293 | + ((nbr_flags & 0x10000) >> 8); |
| 294 | |
| 295 | /* compute trailing zeors based on nbr_flag for substitution process of below left see section .*/ |
| 296 | /* as each bit in nbr flags corresponds to 8 pels for bot_left, left, top and topright but 1 pel for topleft */ |
| 297 | { |
| 298 | nbr_id_from_bl = look_up_trailing_zeros(nbr_flags_temp & 0XF) * 4; /* for bottom left and left */ |
| 299 | if(nbr_id_from_bl == 32) |
| 300 | nbr_id_from_bl = 16; |
| 301 | if(nbr_id_from_bl == 16) |
| 302 | { |
| 303 | /* for top left : 1 pel per nbr bit */ |
| 304 | if(!((nbr_flags_temp >> 8) & 0x1)) |
| 305 | { |
| 306 | nbr_id_from_bl++; |
| 307 | nbr_id_from_bl += look_up_trailing_zeros((nbr_flags_temp >> 4) & 0xF) * 4; /* top and top right; 8 pels per nbr bit */ |
| 308 | |
| 309 | } |
| 310 | } |
| 311 | /* Reverse Substitution Process*/ |
| 312 | if(nbr_id_from_bl) |
| 313 | { |
| 314 | /* Replicate the bottom-left and subsequent unavailable pixels with the 1st available pixel above */ |
| 315 | pu1_ref_u = pu1_dst[2 * nbr_id_from_bl]; |
| 316 | pu1_ref_v = pu1_dst[(2 * nbr_id_from_bl) + 1]; |
| 317 | for(i = 2 * (nbr_id_from_bl - 1); i >= 0; i -= 2) |
| 318 | { |
| 319 | pu1_dst[i] = pu1_ref_u; |
| 320 | pu1_dst[i + 1] = pu1_ref_v; |
| 321 | } |
| 322 | } |
| 323 | } |
| 324 | |
| 325 | /* for the loop of 4*Nt+1 pixels (excluding pixels computed from reverse substitution) */ |
| 326 | while(nbr_id_from_bl < ((T8C_4NT)+1)) |
| 327 | { |
| 328 | /* To Obtain the next unavailable idx flag after reverse neighbor substitution */ |
| 329 | /* Divide by 8 to obtain the original index */ |
| 330 | frwd_nbr_flag = (nbr_id_from_bl >> 2); /*+ (nbr_id_from_bl & 0x1);*/ |
| 331 | |
| 332 | /* The Top-left flag is at the last bit location of nbr_flags*/ |
| 333 | if(nbr_id_from_bl == (T8C_4NT / 2)) |
| 334 | { |
| 335 | get_bits = GET_BIT(nbr_flags_temp, 8); |
| 336 | |
| 337 | /* only pel substitution for TL */ |
| 338 | if(!get_bits) |
| 339 | { |
| 340 | pu1_dst[2 * nbr_id_from_bl] = pu1_dst[(2 * nbr_id_from_bl) - 2]; |
| 341 | pu1_dst[(2 * nbr_id_from_bl) + 1] = pu1_dst[(2 * nbr_id_from_bl) - 1]; |
| 342 | } |
| 343 | } |
| 344 | else |
| 345 | { |
| 346 | get_bits = GET_BIT(nbr_flags_temp, frwd_nbr_flag); |
| 347 | if(!get_bits) |
| 348 | { |
| 349 | UWORD16 *pu2_dst; |
| 350 | /* 8 pel substitution (other than TL) */ |
| 351 | pu2_dst = (UWORD16 *)&pu1_dst[(2 * nbr_id_from_bl) - 2]; |
| 352 | ihevc_memset_16bit((UWORD16 *)(pu1_dst + (2 * nbr_id_from_bl)), pu2_dst[0], 4); |
| 353 | } |
| 354 | |
| 355 | } |
| 356 | nbr_id_from_bl += (nbr_id_from_bl == (T8C_4NT / 2)) ? 1 : 4; |
| 357 | } |
| 358 | |
| 359 | } |
| 360 | else if(nt == 16) |
| 361 | { |
| 362 | /* compute trailing ones based on mbr_flag for substitution process of below left see section .*/ |
| 363 | /* as each bit in nbr flags corresponds to 4 pels for bot_left, left, top and topright but 1 pel for topleft */ |
| 364 | { |
| 365 | nbr_id_from_bl = look_up_trailing_zeros((nbr_flags & 0XFF)) * 4; /* for bottom left and left */ |
| 366 | |
| 367 | if(nbr_id_from_bl == 32) |
| 368 | { |
| 369 | /* for top left : 1 pel per nbr bit */ |
| 370 | if(!((nbr_flags >> 16) & 0x1)) |
| 371 | { |
| 372 | /* top left not available */ |
| 373 | nbr_id_from_bl++; |
| 374 | /* top and top right; 4 pels per nbr bit */ |
| 375 | nbr_id_from_bl += look_up_trailing_zeros((nbr_flags >> 8) & 0xFF) * 4; |
| 376 | } |
| 377 | } |
| 378 | /* Reverse Substitution Process*/ |
| 379 | if(nbr_id_from_bl) |
| 380 | { |
| 381 | /* Replicate the bottom-left and subsequent unavailable pixels with the 1st available pixel above */ |
| 382 | pu1_ref_u = pu1_dst[2 * nbr_id_from_bl]; |
| 383 | pu1_ref_v = pu1_dst[2 * nbr_id_from_bl + 1]; |
| 384 | for(i = (2 * (nbr_id_from_bl - 1)); i >= 0; i -= 2) |
| 385 | { |
| 386 | pu1_dst[i] = pu1_ref_u; |
| 387 | pu1_dst[i + 1] = pu1_ref_v; |
| 388 | } |
| 389 | } |
| 390 | } |
| 391 | |
| 392 | /* for the loop of 4*Nt+1 pixels (excluding pixels computed from reverse substitution) */ |
| 393 | while(nbr_id_from_bl < ((T16C_4NT)+1)) |
| 394 | { |
| 395 | /* To Obtain the next unavailable idx flag after reverse neighbor substitution */ |
| 396 | /* Devide by 4 to obtain the original index */ |
| 397 | frwd_nbr_flag = (nbr_id_from_bl >> 2); /*+ (nbr_id_from_bl & 0x1);*/ |
| 398 | |
| 399 | /* The Top-left flag is at the last bit location of nbr_flags*/ |
| 400 | if(nbr_id_from_bl == (T16C_4NT / 2)) |
| 401 | { |
| 402 | get_bits = GET_BIT(nbr_flags, 16); |
| 403 | /* only pel substitution for TL */ |
| 404 | if(!get_bits) |
| 405 | { |
| 406 | pu1_dst[2 * nbr_id_from_bl] = pu1_dst[(2 * nbr_id_from_bl) - 2]; |
| 407 | pu1_dst[(2 * nbr_id_from_bl) + 1] = pu1_dst[(2 * nbr_id_from_bl) - 1]; |
| 408 | } |
| 409 | } |
| 410 | else |
| 411 | { |
| 412 | get_bits = GET_BIT(nbr_flags, frwd_nbr_flag); |
| 413 | if(!get_bits) |
| 414 | { |
| 415 | UWORD16 *pu2_dst; |
| 416 | /* 4 pel substitution (other than TL) */ |
| 417 | pu2_dst = (UWORD16 *)&pu1_dst[(2 * nbr_id_from_bl) - 2]; |
| 418 | ihevc_memset_16bit((UWORD16 *)(pu1_dst + (2 * nbr_id_from_bl)), pu2_dst[0], 4); |
| 419 | } |
| 420 | |
| 421 | } |
| 422 | nbr_id_from_bl += (nbr_id_from_bl == (T16C_4NT / 2)) ? 1 : 4; |
| 423 | } |
| 424 | } |
| 425 | } |
| 426 | } |
| 427 | |
| 428 | |
| 429 | /** |
| 430 | ******************************************************************************* |
| 431 | * |
| 432 | * @brief |
| 433 | * Planar Intraprediction with reference neighboring samples location |
| 434 | * pointed by 'pu1_ref' to the TU block location pointed by 'pu1_dst' Refer |
| 435 | * to section 8.4.4.2.4 in the standard |
| 436 | * |
| 437 | * @par Description: |
| 438 | * |
| 439 | * |
| 440 | * @param[in] pu1_src |
| 441 | * UWORD8 pointer to the source |
| 442 | * |
| 443 | * @param[in] pu1_dst |
| 444 | * UWORD8 pointer to the destination |
| 445 | * |
| 446 | * @param[in] src_strd |
| 447 | * integer source stride |
| 448 | * |
| 449 | * @param[in] dst_strd |
| 450 | * integer destination stride |
| 451 | * |
| 452 | * @param[in] nt |
| 453 | * integer Transform Block size |
| 454 | * |
| 455 | * @param[in] mode |
| 456 | * integer intraprediction mode |
| 457 | * |
| 458 | * @returns |
| 459 | * |
| 460 | * @remarks |
| 461 | * None |
| 462 | * |
| 463 | ******************************************************************************* |
| 464 | */ |
| 465 | |
| 466 | |
| 467 | void ihevc_intra_pred_chroma_planar(UWORD8 *pu1_ref, |
| 468 | WORD32 src_strd, |
| 469 | UWORD8 *pu1_dst, |
| 470 | WORD32 dst_strd, |
| 471 | WORD32 nt, |
| 472 | WORD32 mode) |
| 473 | { |
| 474 | |
| 475 | WORD32 row, col; |
| 476 | WORD32 log2nt = 5; |
| 477 | WORD32 two_nt, three_nt; |
| 478 | UNUSED(src_strd); |
| 479 | UNUSED(mode); |
| 480 | switch(nt) |
| 481 | { |
| 482 | case 16: |
| 483 | log2nt = 4; |
| 484 | break; |
| 485 | case 8: |
| 486 | log2nt = 3; |
| 487 | break; |
| 488 | case 4: |
| 489 | log2nt = 2; |
| 490 | break; |
| 491 | default: |
| 492 | break; |
| 493 | } |
| 494 | two_nt = 2 * nt; |
| 495 | three_nt = 3 * nt; |
| 496 | /* Planar filtering */ |
| 497 | for(row = 0; row < nt; row++) |
| 498 | { |
| 499 | for(col = 0; col < (2 * nt); col += 2) |
| 500 | { |
| 501 | pu1_dst[row * dst_strd + col] = ((nt - 1 - col / 2) |
| 502 | * pu1_ref[2 * (two_nt - 1 - row)] |
| 503 | + (col / 2 + 1) * pu1_ref[2 * (three_nt + 1)] |
| 504 | + (nt - 1 - row) * pu1_ref[2 * (two_nt + 1) + col] |
| 505 | + (row + 1) * pu1_ref[2 * (nt - 1)] + nt) >> (log2nt + 1); |
| 506 | |
| 507 | pu1_dst[row * dst_strd + col + 1] = ((nt - 1 - col / 2) |
| 508 | * pu1_ref[2 * (two_nt - 1 - row) + 1] |
| 509 | + (col / 2 + 1) * pu1_ref[2 * (three_nt + 1) + 1] |
| 510 | + (nt - 1 - row) * pu1_ref[2 * (two_nt + 1) + col + 1] |
| 511 | + (row + 1) * pu1_ref[2 * (nt - 1) + 1] + nt) >> (log2nt + 1); |
| 512 | } |
| 513 | } |
| 514 | } |
| 515 | |
| 516 | |
| 517 | /** |
| 518 | ******************************************************************************* |
| 519 | * |
| 520 | * @brief |
| 521 | * Intraprediction for DC mode with reference neighboring samples location |
| 522 | * pointed by 'pu1_ref' to the TU block location pointed by 'pu1_dst' Refer |
| 523 | * to section 8.4.4.2.5 in the standard |
| 524 | * |
| 525 | * @par Description: |
| 526 | * |
| 527 | * |
| 528 | * @param[in] pu1_src |
| 529 | * UWORD8 pointer to the source |
| 530 | * |
| 531 | * @param[in] pu1_dst |
| 532 | * UWORD8 pointer to the destination |
| 533 | * |
| 534 | * @param[in] src_strd |
| 535 | * integer source stride |
| 536 | * |
| 537 | * @param[in] dst_strd |
| 538 | * integer destination stride |
| 539 | * |
| 540 | * @param[in] nt |
| 541 | * integer Transform Block size (Chroma) |
| 542 | * |
| 543 | * @param[in] mode |
| 544 | * integer intraprediction mode |
| 545 | * |
| 546 | * @returns |
| 547 | * |
| 548 | * @remarks |
| 549 | * None |
| 550 | * |
| 551 | ******************************************************************************* |
| 552 | */ |
| 553 | |
| 554 | |
| 555 | void ihevc_intra_pred_chroma_dc(UWORD8 *pu1_ref, |
| 556 | WORD32 src_strd, |
| 557 | UWORD8 *pu1_dst, |
| 558 | WORD32 dst_strd, |
| 559 | WORD32 nt, |
| 560 | WORD32 mode) |
| 561 | { |
| 562 | |
| 563 | WORD32 acc_dc_u, acc_dc_v; |
| 564 | WORD32 dc_val_u, dc_val_v; |
| 565 | WORD32 i; |
| 566 | WORD32 row, col; |
| 567 | WORD32 log2nt = 5; |
| 568 | UNUSED(mode); |
| 569 | UNUSED(src_strd); |
| 570 | switch(nt) |
| 571 | { |
| 572 | case 32: |
| 573 | log2nt = 5; |
| 574 | break; |
| 575 | case 16: |
| 576 | log2nt = 4; |
| 577 | break; |
| 578 | case 8: |
| 579 | log2nt = 3; |
| 580 | break; |
| 581 | case 4: |
| 582 | log2nt = 2; |
| 583 | break; |
| 584 | default: |
| 585 | break; |
| 586 | } |
| 587 | |
| 588 | |
| 589 | acc_dc_u = 0; |
| 590 | acc_dc_v = 0; |
| 591 | /* Calculate DC value for the transform block */ |
| 592 | for(i = (2 * nt); i < (4 * nt); i += 2) |
| 593 | { |
| 594 | acc_dc_u += pu1_ref[i]; |
| 595 | acc_dc_v += pu1_ref[i + 1]; |
| 596 | } |
| 597 | for(i = ((4 * nt) + 2); i < ((6 * nt) + 2); i += 2) |
| 598 | { |
| 599 | acc_dc_u += pu1_ref[i]; |
| 600 | acc_dc_v += pu1_ref[i + 1]; |
| 601 | } |
| 602 | |
| 603 | |
| 604 | dc_val_u = (acc_dc_u + nt) >> (log2nt + 1); |
| 605 | dc_val_v = (acc_dc_v + nt) >> (log2nt + 1); |
| 606 | |
| 607 | |
| 608 | /* Fill the remaining rows with DC value*/ |
| 609 | for(row = 0; row < nt; row++) |
| 610 | { |
| 611 | for(col = 0; col < (2 * nt); col += 2) |
| 612 | { |
| 613 | pu1_dst[(row * dst_strd) + col] = dc_val_u; |
| 614 | pu1_dst[(row * dst_strd) + col + 1] = dc_val_v; |
| 615 | } |
| 616 | } |
| 617 | |
| 618 | } |
| 619 | |
| 620 | |
| 621 | /** |
| 622 | ******************************************************************************* |
| 623 | * |
| 624 | * @brief |
| 625 | * Horizontal intraprediction(mode 10) with reference samples location |
| 626 | * pointed by 'pu1_ref' to the TU block location pointed by 'pu1_dst' Refer |
| 627 | * to section 8.4.4.2.6 in the standard (Special case) |
| 628 | * |
| 629 | * @par Description: |
| 630 | * |
| 631 | * |
| 632 | * @param[in] pu1_src |
| 633 | * UWORD8 pointer to the source |
| 634 | * |
| 635 | * @param[in] pu1_dst |
| 636 | * UWORD8 pointer to the destination |
| 637 | * |
| 638 | * @param[in] src_strd |
| 639 | * integer source stride |
| 640 | * |
| 641 | * @param[in] dst_strd |
| 642 | * integer destination stride |
| 643 | * |
| 644 | * @param[in] nt |
| 645 | * integer Transform Block size |
| 646 | * |
| 647 | * @param[in] mode |
| 648 | * integer intraprediction mode |
| 649 | * |
| 650 | * @returns |
| 651 | * |
| 652 | * @remarks |
| 653 | * None |
| 654 | * |
| 655 | ******************************************************************************* |
| 656 | */ |
| 657 | |
| 658 | |
| 659 | void ihevc_intra_pred_chroma_horz(UWORD8 *pu1_ref, |
| 660 | WORD32 src_strd, |
| 661 | UWORD8 *pu1_dst, |
| 662 | WORD32 dst_strd, |
| 663 | WORD32 nt, |
| 664 | WORD32 mode) |
| 665 | { |
| 666 | |
| 667 | WORD32 row, col; |
| 668 | UNUSED(mode); |
| 669 | UNUSED(src_strd); |
| 670 | /* Replication to next rows*/ |
| 671 | for(row = 0; row < nt; row++) |
| 672 | { |
| 673 | for(col = 0; col < (2 * nt); col += 2) |
| 674 | { |
| 675 | pu1_dst[(row * dst_strd) + col] = pu1_ref[(4 * nt) - 2 - 2 * row]; |
| 676 | pu1_dst[(row * dst_strd) + col + 1] = pu1_ref[(4 * nt) - 1 - 2 * row]; |
| 677 | } |
| 678 | } |
| 679 | } |
| 680 | |
| 681 | |
| 682 | |
| 683 | /** |
| 684 | ******************************************************************************* |
| 685 | * |
| 686 | * @brief |
| 687 | * Horizontal intraprediction with reference neighboring samples location |
| 688 | * pointed by 'pu1_ref' to the TU block location pointed by 'pu1_dst' Refer |
| 689 | * to section 8.4.4.2.6 in the standard (Special case) |
| 690 | * |
| 691 | * @par Description: |
| 692 | * |
| 693 | * |
| 694 | * @param[in] pu1_src |
| 695 | * UWORD8 pointer to the source |
| 696 | * |
| 697 | * @param[in] pu1_dst |
| 698 | * UWORD8 pointer to the destination |
| 699 | * |
| 700 | * @param[in] src_strd |
| 701 | * integer source stride |
| 702 | * |
| 703 | * @param[in] dst_strd |
| 704 | * integer destination stride |
| 705 | * |
| 706 | * @param[in] nt |
| 707 | * integer Transform Block size |
| 708 | * |
| 709 | * @param[in] mode |
| 710 | * integer intraprediction mode |
| 711 | * |
| 712 | * @returns |
| 713 | * |
| 714 | * @remarks |
| 715 | * None |
| 716 | * |
| 717 | ******************************************************************************* |
| 718 | */ |
| 719 | |
| 720 | |
| 721 | void ihevc_intra_pred_chroma_ver(UWORD8 *pu1_ref, |
| 722 | WORD32 src_strd, |
| 723 | UWORD8 *pu1_dst, |
| 724 | WORD32 dst_strd, |
| 725 | WORD32 nt, |
| 726 | WORD32 mode) |
| 727 | { |
| 728 | WORD32 row, col; |
| 729 | UNUSED(mode); |
| 730 | UNUSED(src_strd); |
| 731 | /* Replication to next columns*/ |
| 732 | for(row = 0; row < nt; row++) |
| 733 | { |
| 734 | for(col = 0; col < (2 * nt); col += 2) |
| 735 | { |
| 736 | pu1_dst[(row * dst_strd) + col] = pu1_ref[(4 * nt) + 2 + col]; |
| 737 | pu1_dst[(row * dst_strd) + col + 1] = pu1_ref[(4 * nt) + 3 + col]; |
| 738 | } |
| 739 | } |
| 740 | } |
| 741 | |
| 742 | |
| 743 | /** |
| 744 | ******************************************************************************* |
| 745 | * |
| 746 | * @brief |
| 747 | * Intraprediction for mode 2 (sw angle) with reference neighboring samples |
| 748 | * location pointed by 'pu1_ref' to the TU block location pointed by |
| 749 | * 'pu1_dst' Refer to section 8.4.4.2.6 in the standard |
| 750 | * |
| 751 | * @par Description: |
| 752 | * |
| 753 | * |
| 754 | * @param[in] pu1_src |
| 755 | * UWORD8 pointer to the source |
| 756 | * |
| 757 | * @param[in] pu1_dst |
| 758 | * UWORD8 pointer to the destination |
| 759 | * |
| 760 | * @param[in] src_strd |
| 761 | * integer source stride |
| 762 | * |
| 763 | * @param[in] dst_strd |
| 764 | * integer destination stride |
| 765 | * |
| 766 | * @param[in] nt |
| 767 | * integer Transform Block size |
| 768 | * |
| 769 | * @param[in] mode |
| 770 | * integer intraprediction mode |
| 771 | * |
| 772 | * @returns |
| 773 | * |
| 774 | * @remarks |
| 775 | * None |
| 776 | * |
| 777 | ******************************************************************************* |
| 778 | */ |
| 779 | |
| 780 | |
| 781 | void ihevc_intra_pred_chroma_mode2(UWORD8 *pu1_ref, |
| 782 | WORD32 src_strd, |
| 783 | UWORD8 *pu1_dst, |
| 784 | WORD32 dst_strd, |
| 785 | WORD32 nt, |
| 786 | WORD32 mode) |
| 787 | { |
| 788 | WORD32 row, col; |
| 789 | |
| 790 | WORD32 intra_pred_ang = 32; |
| 791 | WORD32 idx_u, idx_v; |
| 792 | UNUSED(src_strd); |
| 793 | UNUSED(mode); |
| 794 | /* For the angle 45, replication is done from the corresponding angle */ |
| 795 | /* intra_pred_ang = tan(angle) in q5 format */ |
| 796 | for(col = 0; col < (2 * nt); col += 2) |
| 797 | { |
| 798 | idx_u = ((col + 1) * intra_pred_ang) >> 5; /* Use idx++ */ |
| 799 | idx_v = (((col + 1) + 1) * intra_pred_ang) >> 5; /* Use idx++ */ |
| 800 | for(row = 0; row < nt; row++) |
| 801 | { |
| 802 | pu1_dst[col + (row * dst_strd)] = pu1_ref[(4 * nt) - 2 * row - idx_u - 3]; |
| 803 | pu1_dst[(col + 1) + (row * dst_strd)] = pu1_ref[(4 * nt) - 2 * row - idx_v - 1]; |
| 804 | } |
| 805 | } |
| 806 | |
| 807 | } |
| 808 | |
| 809 | |
| 810 | /** |
| 811 | ******************************************************************************* |
| 812 | * |
| 813 | * @brief |
| 814 | * Intraprediction for mode 34 (ne angle) and mode 18 (nw angle) with |
| 815 | * reference neighboring samples location pointed by 'pu1_ref' to the TU |
| 816 | * block location pointed by 'pu1_dst' |
| 817 | * |
| 818 | * @par Description: |
| 819 | * |
| 820 | * |
| 821 | * @param[in] pu1_src |
| 822 | * UWORD8 pointer to the source |
| 823 | * |
| 824 | * @param[in] pu1_dst |
| 825 | * UWORD8 pointer to the destination |
| 826 | * |
| 827 | * @param[in] src_strd |
| 828 | * integer source stride |
| 829 | * |
| 830 | * @param[in] dst_strd |
| 831 | * integer destination stride |
| 832 | * |
| 833 | * @param[in] nt |
| 834 | * integer Transform Block size |
| 835 | * |
| 836 | * @param[in] mode |
| 837 | * integer intraprediction mode |
| 838 | * |
| 839 | * @returns |
| 840 | * |
| 841 | * @remarks |
| 842 | * None |
| 843 | * |
| 844 | ******************************************************************************* |
| 845 | */ |
| 846 | |
| 847 | |
| 848 | void ihevc_intra_pred_chroma_mode_18_34(UWORD8 *pu1_ref, |
| 849 | WORD32 src_strd, |
| 850 | UWORD8 *pu1_dst, |
| 851 | WORD32 dst_strd, |
| 852 | WORD32 nt, |
| 853 | WORD32 mode) |
| 854 | { |
| 855 | WORD32 row, col; |
| 856 | WORD32 intra_pred_ang; |
| 857 | WORD32 idx = 0; |
| 858 | UNUSED(src_strd); |
| 859 | intra_pred_ang = 32; /*Default value*/ |
| 860 | /* For mode 18, angle is -45degree */ |
| 861 | if(mode == 18) |
| 862 | intra_pred_ang = -32; |
| 863 | /* For mode 34, angle is 45degree */ |
| 864 | else if(mode == 34) |
| 865 | intra_pred_ang = 32; |
| 866 | /* For the angle 45 and -45, replication is done from the corresponding angle */ |
| 867 | /* No interpolation is done for 45 degree*/ |
| 868 | for(row = 0; row < nt; row++) |
| 869 | { |
| 870 | idx = ((row + 1) * intra_pred_ang) >> 5; |
| 871 | |
| 872 | for(col = 0; col < (2 * nt); col += 2) |
| 873 | { |
| 874 | pu1_dst[col + (row * dst_strd)] = pu1_ref[(4 * nt) + col + 2 * idx + 2]; |
| 875 | pu1_dst[(col + 1) + (row * dst_strd)] = pu1_ref[(4 * nt) + (col + 1) + 2 * idx + 2]; |
| 876 | } |
| 877 | |
| 878 | } |
| 879 | |
| 880 | } |
| 881 | |
| 882 | |
| 883 | /** |
| 884 | ******************************************************************************* |
| 885 | * |
| 886 | * @brief |
| 887 | * Intraprediction for mode 3 to 9 (positive angle, horizontal mode ) with |
| 888 | * reference neighboring samples location pointed by 'pu1_ref' to the TU |
| 889 | * block location pointed by 'pu1_dst' |
| 890 | * |
| 891 | * @par Description: |
| 892 | * |
| 893 | * |
| 894 | * @param[in] pu1_src |
| 895 | * UWORD8 pointer to the source |
| 896 | * |
| 897 | * @param[in] pu1_dst |
| 898 | * UWORD8 pointer to the destination |
| 899 | * |
| 900 | * @param[in] src_strd |
| 901 | * integer source stride |
| 902 | * |
| 903 | * @param[in] dst_strd |
| 904 | * integer destination stride |
| 905 | * |
| 906 | * @param[in] nt |
| 907 | * integer Transform Block size |
| 908 | * |
| 909 | * @param[in] mode |
| 910 | * integer intraprediction mode |
| 911 | * |
| 912 | * @returns |
| 913 | * |
| 914 | * @remarks |
| 915 | * None |
| 916 | * |
| 917 | ******************************************************************************* |
| 918 | */ |
| 919 | |
| 920 | |
| 921 | void ihevc_intra_pred_chroma_mode_3_to_9(UWORD8 *pu1_ref, |
| 922 | WORD32 src_strd, |
| 923 | UWORD8 *pu1_dst, |
| 924 | WORD32 dst_strd, |
| 925 | WORD32 nt, |
| 926 | WORD32 mode) |
| 927 | { |
| 928 | WORD32 row, col; |
| 929 | |
| 930 | WORD32 intra_pred_ang; |
| 931 | WORD32 idx_u, ref_main_idx_u; |
| 932 | WORD32 idx_v, ref_main_idx_v; |
| 933 | WORD32 pos_u, fract_u; |
| 934 | WORD32 pos_v, fract_v; |
| 935 | UNUSED(src_strd); |
| 936 | /* Intra Pred Angle according to the mode */ |
| 937 | intra_pred_ang = gai4_ihevc_ang_table[mode]; |
| 938 | |
| 939 | /* For the angles other then 45 degree, interpolation btw 2 neighboring */ |
| 940 | /* samples dependent on distance to obtain destination sample */ |
| 941 | |
| 942 | for(col = 0; col < (2 * nt); col += 2) |
| 943 | { |
| 944 | pos_u = ((col / 2 + 1) * intra_pred_ang); |
| 945 | pos_v = ((col / 2 + 1) * intra_pred_ang); |
| 946 | |
| 947 | idx_u = pos_u >> 5; |
| 948 | fract_u = pos_u & (31); |
| 949 | |
| 950 | idx_v = pos_v >> 5; |
| 951 | fract_v = pos_v & (31); |
| 952 | // Do linear filtering |
| 953 | for(row = 0; row < nt; row++) |
| 954 | { |
| 955 | ref_main_idx_u = (4 * nt) - 2 * row - 2 * idx_u - 2; |
| 956 | ref_main_idx_v = (4 * nt) - 2 * row - 2 * idx_v - 1; |
| 957 | |
| 958 | pu1_dst[col + (row * dst_strd)] = (((32 - fract_u) |
| 959 | * pu1_ref[ref_main_idx_u] |
| 960 | + fract_u * pu1_ref[ref_main_idx_u - 2] + 16) >> 5); |
| 961 | |
| 962 | pu1_dst[(col + 1) + (row * dst_strd)] = (((32 - fract_v) |
| 963 | * pu1_ref[ref_main_idx_v] |
| 964 | + fract_v * pu1_ref[ref_main_idx_v - 2] + 16) >> 5); |
| 965 | } |
| 966 | |
| 967 | } |
| 968 | |
| 969 | } |
| 970 | |
| 971 | |
| 972 | /** |
| 973 | ******************************************************************************* |
| 974 | * |
| 975 | * @brief |
| 976 | * Intraprediction for mode 11 to 17 (negative angle, horizontal mode ) |
| 977 | * with reference neighboring samples location pointed by 'pu1_ref' to the |
| 978 | * TU block location pointed by 'pu1_dst' |
| 979 | * |
| 980 | * @par Description: |
| 981 | * |
| 982 | * |
| 983 | * @param[in] pu1_src |
| 984 | * UWORD8 pointer to the source |
| 985 | * |
| 986 | * @param[in] pu1_dst |
| 987 | * UWORD8 pointer to the destination |
| 988 | * |
| 989 | * @param[in] src_strd |
| 990 | * integer source stride |
| 991 | * |
| 992 | * @param[in] dst_strd |
| 993 | * integer destination stride |
| 994 | * |
| 995 | * @param[in] nt |
| 996 | * integer Transform Block size |
| 997 | * |
| 998 | * @param[in] mode |
| 999 | * integer intraprediction mode |
| 1000 | * |
| 1001 | * @returns |
| 1002 | * |
| 1003 | * @remarks |
| 1004 | * None |
| 1005 | * |
| 1006 | ******************************************************************************* |
| 1007 | */ |
| 1008 | |
| 1009 | |
| 1010 | void ihevc_intra_pred_chroma_mode_11_to_17(UWORD8 *pu1_ref, |
| 1011 | WORD32 src_strd, |
| 1012 | UWORD8 *pu1_dst, |
| 1013 | WORD32 dst_strd, |
| 1014 | WORD32 nt, |
| 1015 | WORD32 mode) |
| 1016 | { |
| 1017 | /* This function and ihevc_intra_pred_CHROMA_mode_19_to_25 are same except*/ |
| 1018 | /* for ref main & side samples assignment,can be combined for */ |
| 1019 | /* optimzation*/ |
| 1020 | |
| 1021 | WORD32 row, col, k; |
| 1022 | WORD32 intra_pred_ang, inv_ang, inv_ang_sum; |
| 1023 | WORD32 idx_u, idx_v, ref_main_idx_u, ref_main_idx_v, ref_idx; |
| 1024 | WORD32 pos_u, pos_v, fract_u, fract_v; |
| 1025 | |
| 1026 | UWORD8 ref_temp[2 * MAX_CU_SIZE + 2]; |
| 1027 | UWORD8 *ref_main; |
| 1028 | UNUSED(src_strd); |
| 1029 | inv_ang_sum = 128; |
| 1030 | |
| 1031 | intra_pred_ang = gai4_ihevc_ang_table[mode]; |
| 1032 | |
| 1033 | inv_ang = gai4_ihevc_inv_ang_table[mode - 11]; |
| 1034 | /* Intermediate reference samples for negative angle modes */ |
| 1035 | /* This have to be removed during optimization*/ |
| 1036 | |
| 1037 | /* For horizontal modes, (ref main = ref left) (ref side = ref above) */ |
| 1038 | |
| 1039 | |
| 1040 | ref_main = ref_temp + 2 * nt; |
| 1041 | for(k = 0; k < (2 * (nt + 1)); k += 2) |
| 1042 | { |
| 1043 | ref_temp[k + (2 * (nt - 1))] = pu1_ref[(4 * nt) - k]; |
| 1044 | ref_temp[k + 1 + (2 * (nt - 1))] = pu1_ref[(4 * nt) - k + 1]; |
| 1045 | } |
| 1046 | |
| 1047 | ref_main = ref_temp + (2 * (nt - 1)); |
| 1048 | ref_idx = (nt * intra_pred_ang) >> 5; |
| 1049 | |
| 1050 | /* SIMD Optimization can be done using look-up table for the loop */ |
| 1051 | /* For negative angled derive the main reference samples from side */ |
| 1052 | /* reference samples refer to section 8.4.4.2.6 */ |
| 1053 | for(k = -2; k > (2 * ref_idx); k -= 2) |
| 1054 | { |
| 1055 | inv_ang_sum += inv_ang; |
| 1056 | ref_main[k] = pu1_ref[(4 * nt) + ((inv_ang_sum >> 8) << 1)]; |
| 1057 | ref_main[k + 1] = pu1_ref[((4 * nt) + 1) + ((inv_ang_sum >> 8) << 1)]; |
| 1058 | } |
| 1059 | |
| 1060 | /* For the angles other then 45 degree, interpolation btw 2 neighboring */ |
| 1061 | /* samples dependent on distance to obtain destination sample */ |
| 1062 | for(col = 0; col < (2 * nt); col += 2) |
| 1063 | { |
| 1064 | pos_u = ((col / 2 + 1) * intra_pred_ang); |
| 1065 | pos_v = ((col / 2 + 1) * intra_pred_ang); |
| 1066 | idx_u = pos_u >> 5; |
| 1067 | idx_v = pos_v >> 5; |
| 1068 | fract_u = pos_u & (31); |
| 1069 | fract_v = pos_v & (31); |
| 1070 | |
| 1071 | // Do linear filtering |
| 1072 | for(row = 0; row < nt; row++) |
| 1073 | { |
| 1074 | ref_main_idx_u = 2 * (row + idx_u + 1); |
| 1075 | ref_main_idx_v = 2 * (row + idx_v + 1) + 1; |
| 1076 | |
| 1077 | pu1_dst[col + (dst_strd * row)] = (UWORD8)(((32 - fract_u) |
| 1078 | * ref_main[ref_main_idx_u] |
| 1079 | + fract_u * ref_main[ref_main_idx_u + 2] + 16) >> 5); |
| 1080 | pu1_dst[(col + 1) + (dst_strd * row)] = (UWORD8)(((32 - fract_v) |
| 1081 | * ref_main[ref_main_idx_v] |
| 1082 | + fract_v * ref_main[ref_main_idx_v + 2] + 16) >> 5); |
| 1083 | |
| 1084 | } |
| 1085 | |
| 1086 | } |
| 1087 | |
| 1088 | } |
| 1089 | |
| 1090 | |
| 1091 | |
| 1092 | /** |
| 1093 | ******************************************************************************* |
| 1094 | * |
| 1095 | * @brief |
| 1096 | * Intraprediction for mode 19 to 25 (negative angle, vertical mode ) with |
| 1097 | * reference neighboring samples location pointed by 'pu1_ref' to the TU |
| 1098 | * block location pointed by 'pu1_dst' |
| 1099 | * |
| 1100 | * @par Description: |
| 1101 | * |
| 1102 | * |
| 1103 | * @param[in] pu1_src |
| 1104 | * UWORD8 pointer to the source |
| 1105 | * |
| 1106 | * @param[in] pu1_dst |
| 1107 | * UWORD8 pointer to the destination |
| 1108 | * |
| 1109 | * @param[in] src_strd |
| 1110 | * integer source stride |
| 1111 | * |
| 1112 | * @param[in] dst_strd |
| 1113 | * integer destination stride |
| 1114 | * |
| 1115 | * @param[in] nt |
| 1116 | * integer Transform Block size |
| 1117 | * |
| 1118 | * @param[in] mode |
| 1119 | * integer intraprediction mode |
| 1120 | * |
| 1121 | * @returns |
| 1122 | * |
| 1123 | * @remarks |
| 1124 | * None |
| 1125 | * |
| 1126 | ******************************************************************************* |
| 1127 | */ |
| 1128 | |
| 1129 | |
| 1130 | void ihevc_intra_pred_chroma_mode_19_to_25(UWORD8 *pu1_ref, |
| 1131 | WORD32 src_strd, |
| 1132 | UWORD8 *pu1_dst, |
| 1133 | WORD32 dst_strd, |
| 1134 | WORD32 nt, |
| 1135 | WORD32 mode) |
| 1136 | { |
| 1137 | |
| 1138 | WORD32 row, col, k; |
| 1139 | WORD32 intra_pred_ang, idx; |
| 1140 | WORD32 inv_ang, inv_ang_sum, pos, fract; |
| 1141 | WORD32 ref_main_idx_u, ref_main_idx_v, ref_idx; |
| 1142 | UWORD8 ref_temp[(2 * MAX_CU_SIZE) + 2]; |
| 1143 | UWORD8 *ref_main; |
| 1144 | UNUSED(src_strd); |
| 1145 | |
| 1146 | |
| 1147 | intra_pred_ang = gai4_ihevc_ang_table_chroma[mode]; |
| 1148 | inv_ang = gai4_ihevc_inv_ang_table_chroma[mode - 12]; |
| 1149 | |
| 1150 | /* Intermediate reference samples for negative angle modes */ |
| 1151 | /* This have to be removed during optimization*/ |
| 1152 | /* For horizontal modes, (ref main = ref above) (ref side = ref left) */ |
| 1153 | ref_main = ref_temp + 2 * nt; |
| 1154 | for(k = 0; k < (2 * (nt + 1)); k += 2) |
| 1155 | { |
| 1156 | ref_temp[k + (2 * (nt - 1))] = pu1_ref[(4 * nt) + k]; |
| 1157 | ref_temp[k + 1 + (2 * (nt - 1))] = pu1_ref[(4 * nt) + k + 1]; |
| 1158 | } |
| 1159 | |
| 1160 | |
| 1161 | ref_idx = (nt * intra_pred_ang) >> 5; |
| 1162 | inv_ang_sum = 128; |
| 1163 | ref_main = ref_temp + (2 * (nt - 1)); |
| 1164 | /* SIMD Optimization can be done using look-up table for the loop */ |
| 1165 | /* For negative angled derive the main reference samples from side */ |
| 1166 | /* reference samples refer to section 8.4.4.2.6 */ |
| 1167 | for(k = -2; k > (2 * ref_idx); k -= 2) |
| 1168 | { |
| 1169 | inv_ang_sum += inv_ang; |
| 1170 | ref_main[k] = pu1_ref[(4 * nt) - (inv_ang_sum >> 8) * 2]; |
| 1171 | ref_main[k + 1] = pu1_ref[((4 * nt) + 1) - (inv_ang_sum >> 8) * 2]; |
| 1172 | } |
| 1173 | |
| 1174 | for(row = 0; row < nt; row++) |
| 1175 | { |
| 1176 | pos = ((row + 1) * intra_pred_ang); |
| 1177 | idx = pos >> 5; |
| 1178 | fract = pos & (31); |
| 1179 | |
| 1180 | // Do linear filtering |
| 1181 | for(col = 0; col < (2 * nt); col += 2) |
| 1182 | { |
| 1183 | ref_main_idx_u = col + 2 * idx + 2; |
| 1184 | ref_main_idx_v = (col + 1) + 2 * idx + 2; |
| 1185 | pu1_dst[(row * dst_strd) + col] = (UWORD8)(((32 - fract) |
| 1186 | * ref_main[ref_main_idx_u] |
| 1187 | + fract * ref_main[ref_main_idx_u + 2] + 16) >> 5); |
| 1188 | pu1_dst[(row * dst_strd) + (col + 1)] = (UWORD8)(((32 - fract) |
| 1189 | * ref_main[ref_main_idx_v] |
| 1190 | + fract * ref_main[ref_main_idx_v + 2] + 16) >> 5); |
| 1191 | |
| 1192 | } |
| 1193 | |
| 1194 | } |
| 1195 | |
| 1196 | } |
| 1197 | |
| 1198 | |
| 1199 | |
| 1200 | /** |
| 1201 | ******************************************************************************* |
| 1202 | * |
| 1203 | * @brief |
| 1204 | * Intraprediction for mode 27 to 33 (positive angle, vertical mode ) with |
| 1205 | * reference neighboring samples location pointed by 'pu1_ref' to the TU |
| 1206 | * block location pointed by 'pu1_dst' |
| 1207 | * |
| 1208 | * @par Description: |
| 1209 | * |
| 1210 | * |
| 1211 | * @param[in] pu1_src |
| 1212 | * UWORD8 pointer to the source |
| 1213 | * |
| 1214 | * @param[in] pu1_dst |
| 1215 | * UWORD8 pointer to the destination |
| 1216 | * |
| 1217 | * @param[in] src_strd |
| 1218 | * integer source stride |
| 1219 | * |
| 1220 | * @param[in] dst_strd |
| 1221 | * integer destination stride |
| 1222 | * |
| 1223 | * @param[in] nt |
| 1224 | * integer Transform Block size |
| 1225 | * |
| 1226 | * @param[in] mode |
| 1227 | * integer intraprediction mode |
| 1228 | * |
| 1229 | * @returns |
| 1230 | * |
| 1231 | * @remarks |
| 1232 | * None |
| 1233 | * |
| 1234 | ******************************************************************************* |
| 1235 | */ |
| 1236 | |
| 1237 | |
| 1238 | void ihevc_intra_pred_chroma_mode_27_to_33(UWORD8 *pu1_ref, |
| 1239 | WORD32 src_strd, |
| 1240 | UWORD8 *pu1_dst, |
| 1241 | WORD32 dst_strd, |
| 1242 | WORD32 nt, |
| 1243 | WORD32 mode) |
| 1244 | { |
| 1245 | WORD32 row, col; |
| 1246 | WORD32 pos, fract; |
| 1247 | WORD32 intra_pred_ang; |
| 1248 | WORD32 idx, ref_main_idx_u, ref_main_idx_v; |
| 1249 | UNUSED(src_strd); |
| 1250 | |
| 1251 | |
| 1252 | intra_pred_ang = gai4_ihevc_ang_table_chroma[mode]; |
| 1253 | |
| 1254 | for(row = 0; row < nt; row++) |
| 1255 | { |
| 1256 | pos = ((row + 1) * intra_pred_ang); |
| 1257 | idx = pos >> 5; |
| 1258 | fract = pos & (31); |
| 1259 | |
| 1260 | |
| 1261 | // Do linear filtering |
| 1262 | for(col = 0; col < (2 * nt); col += 2) |
| 1263 | { |
| 1264 | ref_main_idx_u = (4 * nt) + col + 2 * idx + 2; |
| 1265 | ref_main_idx_v = (4 * nt) + (col + 1) + 2 * idx + 2; |
| 1266 | pu1_dst[col + (row * dst_strd)] = (((32 - fract) |
| 1267 | * pu1_ref[ref_main_idx_u] |
| 1268 | + fract * pu1_ref[ref_main_idx_u + 2] + 16) >> 5); |
| 1269 | pu1_dst[(col + 1) + (row * dst_strd)] = (((32 - fract) |
| 1270 | * pu1_ref[ref_main_idx_v] |
| 1271 | + fract * pu1_ref[ref_main_idx_v + 2] + 16) >> 5); |
| 1272 | |
| 1273 | } |
| 1274 | } |
| 1275 | |
| 1276 | } |
| 1277 | |