1 /****************************************************************************** 2 * 3 * Copyright (C) 2015 The Android Open Source Project 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 * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore 19 */ 20 /** 21 ******************************************************************************* 22 * @file 23 * ih264_iquant_itrans_recon.c 24 * 25 * @brief 26 * Contains definition of functions for h264 inverse quantization inverse transformation and recon 27 * 28 * @author 29 * Ittiam 30 * 31 * @par List of Functions: 32 * - ih264_iquant_itrans_recon_4x4() 33 * - ih264_iquant_itrans_recon_8x8() 34 * - ih264_iquant_itrans_recon_4x4_dc() 35 * - ih264_iquant_itrans_recon_8x8_dc() 36 * - ih264_iquant_itrans_recon_chroma_4x4() 37 * -ih264_iquant_itrans_recon_chroma_4x4_dc() 38 * 39 * @remarks 40 * 41 ******************************************************************************* 42 */ 43 44 /*****************************************************************************/ 45 /* File Includes */ 46 /*****************************************************************************/ 47 48 /* User include files */ 49 #include "ih264_typedefs.h" 50 #include "ih264_defs.h" 51 #include "ih264_trans_macros.h" 52 #include "ih264_macros.h" 53 #include "ih264_platform_macros.h" 54 #include "ih264_trans_data.h" 55 #include "ih264_size_defs.h" 56 #include "ih264_structs.h" 57 #include "ih264_trans_quant_itrans_iquant.h" 58 59 /* 60 ******************************************************************************** 61 * 62 * @brief This function reconstructs a 4x4 sub block from quantized resiude and 63 * prediction buffer 64 * 65 * @par Description: 66 * The quantized residue is first inverse quantized, then inverse transformed. 67 * This inverse transformed content is added to the prediction buffer to recon- 68 * struct the end output 69 * 70 * @param[in] pi2_src 71 * quantized 4x4 block 72 * 73 * @param[in] pu1_pred 74 * prediction 4x4 block 75 * 76 * @param[out] pu1_out 77 * reconstructed 4x4 block 78 * 79 * @param[in] src_strd 80 * quantization buffer stride 81 * 82 * @param[in] pred_strd, 83 * Prediction buffer stride 84 * 85 * @param[in] out_strd 86 * recon buffer Stride 87 * 88 * @param[in] pu2_scaling_list 89 * pointer to scaling list 90 * 91 * @param[in] pu2_norm_adjust 92 * pointer to inverse scale matrix 93 * 94 * @param[in] u4_qp_div_6 95 * Floor (qp/6) 96 * 97 * @param[in] pi4_tmp 98 * temporary buffer of size 1*16 99 * 100 * @returns none 101 * 102 * @remarks none 103 * 104 ******************************************************************************* 105 */ 106 void ih264_iquant_itrans_recon_4x4(WORD16 *pi2_src, 107 UWORD8 *pu1_pred, 108 UWORD8 *pu1_out, 109 WORD32 pred_strd, 110 WORD32 out_strd, 111 const UWORD16 *pu2_iscal_mat, 112 const UWORD16 *pu2_weigh_mat, 113 UWORD32 u4_qp_div_6, 114 WORD16 *pi2_tmp, 115 WORD32 iq_start_idx, 116 WORD16 *pi2_dc_ld_addr 117 ) 118 { 119 WORD16 *pi2_src_ptr = pi2_src; 120 WORD16 *pi2_tmp_ptr = pi2_tmp; 121 UWORD8 *pu1_pred_ptr = pu1_pred; 122 UWORD8 *pu1_out_ptr = pu1_out; 123 WORD16 x0, x1, x2, x3, i; 124 WORD32 q0, q1, q2, q3; 125 WORD16 i_macro; 126 WORD16 rnd_fact = (u4_qp_div_6 < 4) ? 1 << (3 - u4_qp_div_6) : 0; 127 128 /* inverse quant */ 129 /*horizontal inverse transform */ 130 for(i = 0; i < SUB_BLK_WIDTH_4x4; i++) 131 { 132 q0 = pi2_src_ptr[0]; 133 INV_QUANT(q0, pu2_iscal_mat[0], pu2_weigh_mat[0], u4_qp_div_6, rnd_fact, 134 4); 135 if (i==0 && iq_start_idx == 1) 136 q0 = pi2_dc_ld_addr[0]; // Restoring dc value for intra case 137 138 q2 = pi2_src_ptr[2]; 139 INV_QUANT(q2, pu2_iscal_mat[2], pu2_weigh_mat[2], u4_qp_div_6, rnd_fact, 140 4); 141 142 x0 = q0 + q2; 143 x1 = q0 - q2; 144 145 q1 = pi2_src_ptr[1]; 146 INV_QUANT(q1, pu2_iscal_mat[1], pu2_weigh_mat[1], u4_qp_div_6, rnd_fact, 147 4); 148 149 q3 = pi2_src_ptr[3]; 150 INV_QUANT(q3, pu2_iscal_mat[3], pu2_weigh_mat[3], u4_qp_div_6, rnd_fact, 151 4); 152 153 x2 = (q1 >> 1) - q3; 154 x3 = q1 + (q3 >> 1); 155 156 pi2_tmp_ptr[0] = x0 + x3; 157 pi2_tmp_ptr[1] = x1 + x2; 158 pi2_tmp_ptr[2] = x1 - x2; 159 pi2_tmp_ptr[3] = x0 - x3; 160 161 pi2_src_ptr += SUB_BLK_WIDTH_4x4; 162 pi2_tmp_ptr += SUB_BLK_WIDTH_4x4; 163 pu2_iscal_mat += SUB_BLK_WIDTH_4x4; 164 pu2_weigh_mat += SUB_BLK_WIDTH_4x4; 165 } 166 167 /* vertical inverse transform */ 168 pi2_tmp_ptr = pi2_tmp; 169 for(i = 0; i < SUB_BLK_WIDTH_4x4; i++) 170 { 171 pu1_pred_ptr = pu1_pred; 172 pu1_out = pu1_out_ptr; 173 174 x0 = (pi2_tmp_ptr[0] + pi2_tmp_ptr[8]); 175 x1 = (pi2_tmp_ptr[0] - pi2_tmp_ptr[8]); 176 x2 = (pi2_tmp_ptr[4] >> 1) - pi2_tmp_ptr[12]; 177 x3 = pi2_tmp_ptr[4] + (pi2_tmp_ptr[12] >> 1); 178 179 /* inverse prediction */ 180 i_macro = x0 + x3; 181 i_macro = ((i_macro + 32) >> 6); 182 i_macro += *pu1_pred_ptr; 183 *pu1_out = CLIP_U8(i_macro); 184 pu1_pred_ptr += pred_strd; 185 pu1_out += out_strd; 186 187 i_macro = x1 + x2; 188 i_macro = ((i_macro + 32) >> 6); 189 i_macro += *pu1_pred_ptr; 190 *pu1_out = CLIP_U8(i_macro); 191 pu1_pred_ptr += pred_strd; 192 pu1_out += out_strd; 193 194 i_macro = x1 - x2; 195 i_macro = ((i_macro + 32) >> 6); 196 i_macro += *pu1_pred_ptr; 197 *pu1_out = CLIP_U8(i_macro); 198 pu1_pred_ptr += pred_strd; 199 pu1_out += out_strd; 200 201 i_macro = x0 - x3; 202 i_macro = ((i_macro + 32) >> 6); 203 i_macro += *pu1_pred_ptr; 204 *pu1_out = CLIP_U8(i_macro); 205 206 pi2_tmp_ptr++; 207 pu1_out_ptr++; 208 pu1_pred++; 209 } 210 211 } 212 213 void ih264_iquant_itrans_recon_4x4_dc(WORD16 *pi2_src, 214 UWORD8 *pu1_pred, 215 UWORD8 *pu1_out, 216 WORD32 pred_strd, 217 WORD32 out_strd, 218 const UWORD16 *pu2_iscal_mat, 219 const UWORD16 *pu2_weigh_mat, 220 UWORD32 u4_qp_div_6, 221 WORD16 *pi2_tmp, 222 WORD32 iq_start_idx, 223 WORD16 *pi2_dc_ld_addr) 224 { 225 UWORD8 *pu1_pred_ptr = pu1_pred; 226 UWORD8 *pu1_out_ptr = pu1_out; 227 WORD32 q0; 228 WORD16 x, i_macro, i; 229 WORD16 rnd_fact = (u4_qp_div_6 < 4) ? 1 << (3 - u4_qp_div_6) : 0; 230 UNUSED(pi2_tmp); 231 232 if (iq_start_idx == 0) 233 { 234 q0 = pi2_src[0]; 235 INV_QUANT(q0, pu2_iscal_mat[0], pu2_weigh_mat[0], u4_qp_div_6, rnd_fact, 4); 236 } 237 else 238 { 239 q0 = pi2_dc_ld_addr[0]; // Restoring dc value for intra case3 240 } 241 i_macro = ((q0 + 32) >> 6); 242 for(i = 0; i < SUB_BLK_WIDTH_4x4; i++) 243 { 244 pu1_pred_ptr = pu1_pred; 245 pu1_out = pu1_out_ptr; 246 247 /* inverse prediction */ 248 249 x = i_macro + *pu1_pred_ptr; 250 *pu1_out = CLIP_U8(x); 251 pu1_pred_ptr += pred_strd; 252 pu1_out += out_strd; 253 254 x = i_macro + *pu1_pred_ptr; 255 *pu1_out = CLIP_U8(x); 256 pu1_pred_ptr += pred_strd; 257 pu1_out += out_strd; 258 259 x = i_macro + *pu1_pred_ptr; 260 *pu1_out = CLIP_U8(x); 261 pu1_pred_ptr += pred_strd; 262 pu1_out += out_strd; 263 264 x = i_macro + *pu1_pred_ptr; 265 *pu1_out = CLIP_U8(x); 266 267 pu1_out_ptr++; 268 pu1_pred++; 269 } 270 } 271 272 /** 273 ******************************************************************************* 274 * 275 * @brief 276 * This function performs inverse quant and Inverse transform type Ci4 for 8x8 block 277 * 278 * @par Description: 279 * Performs inverse transform Ci8 and adds the residue to get the 280 * reconstructed block 281 * 282 * @param[in] pi2_src 283 * Input 8x8coefficients 284 * 285 * @param[in] pu1_pred 286 * Prediction 8x8 block 287 * 288 * @param[out] pu1_recon 289 * Output 8x8 block 290 * 291 * @param[in] q_div 292 * QP/6 293 * 294 * @param[in] q_rem 295 * QP%6 296 * 297 * @param[in] q_lev 298 * Quantizer level 299 * 300 * @param[in] src_strd 301 * Input stride 302 * 303 * @param[in] pred_strd, 304 * Prediction stride 305 * 306 * @param[in] out_strd 307 * Output Stride 308 * 309 * @param[in] pi4_tmp 310 * temporary buffer of size 1*16 we dont need a bigger blcok since we reuse 311 * the tmp for each block 312 * 313 * @param[in] pu4_iquant_mat 314 * Pointer to the inverse quantization matrix 315 * 316 * @returns Void 317 * 318 * @remarks 319 * None 320 * 321 ******************************************************************************* 322 */ 323 void ih264_iquant_itrans_recon_8x8(WORD16 *pi2_src, 324 UWORD8 *pu1_pred, 325 UWORD8 *pu1_out, 326 WORD32 pred_strd, 327 WORD32 out_strd, 328 const UWORD16 *pu2_iscale_mat, 329 const UWORD16 *pu2_weigh_mat, 330 UWORD32 qp_div, 331 WORD16 *pi2_tmp, 332 WORD32 iq_start_idx, 333 WORD16 *pi2_dc_ld_addr 334 ) 335 { 336 WORD32 i; 337 WORD16 *pi2_tmp_ptr = pi2_tmp; 338 UWORD8 *pu1_pred_ptr = pu1_pred; 339 UWORD8 *pu1_out_ptr = pu1_out; 340 WORD16 i_z0, i_z1, i_z2, i_z3, i_z4, i_z5, i_z6, i_z7; 341 WORD16 i_y0, i_y1, i_y2, i_y3, i_y4, i_y5, i_y6, i_y7; 342 WORD16 i_macro; 343 WORD32 q; 344 WORD32 rnd_fact = (qp_div < 6) ? (1 << (5 - qp_div)) : 0; 345 UNUSED(iq_start_idx); 346 UNUSED(pi2_dc_ld_addr); 347 /*************************************************************/ 348 /* De quantization of coefficients. Will be replaced by SIMD */ 349 /* operations on platform. Note : DC coeff is not scaled */ 350 /*************************************************************/ 351 for(i = 0; i < (SUB_BLK_WIDTH_8x8 * SUB_BLK_WIDTH_8x8); i++) 352 { 353 q = pi2_src[i]; 354 INV_QUANT(q, pu2_iscale_mat[i], pu2_weigh_mat[i], qp_div, rnd_fact, 6); 355 pi2_tmp_ptr[i] = q; 356 } 357 /* Perform Inverse transform */ 358 /*--------------------------------------------------------------------*/ 359 /* IDCT [ Horizontal transformation ] */ 360 /*--------------------------------------------------------------------*/ 361 for(i = 0; i < SUB_BLK_WIDTH_8x8; i++) 362 { 363 /*------------------------------------------------------------------*/ 364 /* y0 = w0 + w4 */ 365 /* y1 = -w3 + w5 - w7 - (w7 >> 1) */ 366 /* y2 = w0 - w4 */ 367 /* y3 = w1 + w7 - w3 - (w3 >> 1) */ 368 /* y4 = (w2 >> 1) - w6 */ 369 /* y5 = -w1 + w7 + w5 + (w5 >> 1) */ 370 /* y6 = w2 + (w6 >> 1) */ 371 /* y7 = w3 + w5 + w1 + (w1 >> 1) */ 372 /*------------------------------------------------------------------*/ 373 i_y0 = (pi2_tmp_ptr[0] + pi2_tmp_ptr[4] ); 374 375 i_y1 = ((WORD32)(-pi2_tmp_ptr[3]) + pi2_tmp_ptr[5] - pi2_tmp_ptr[7] 376 - (pi2_tmp_ptr[7] >> 1)); 377 378 i_y2 = (pi2_tmp_ptr[0] - pi2_tmp_ptr[4] ); 379 380 i_y3 = ((WORD32)pi2_tmp_ptr[1] + pi2_tmp_ptr[7] - pi2_tmp_ptr[3] 381 - (pi2_tmp_ptr[3] >> 1)); 382 383 i_y4 = ((pi2_tmp_ptr[2] >> 1) - pi2_tmp_ptr[6] ); 384 385 i_y5 = ((WORD32)(-pi2_tmp_ptr[1]) + pi2_tmp_ptr[7] + pi2_tmp_ptr[5] 386 + (pi2_tmp_ptr[5] >> 1)); 387 388 i_y6 = (pi2_tmp_ptr[2] + (pi2_tmp_ptr[6] >> 1)); 389 390 i_y7 = ((WORD32)pi2_tmp_ptr[3] + pi2_tmp_ptr[5] + pi2_tmp_ptr[1] 391 + (pi2_tmp_ptr[1] >> 1)); 392 393 /*------------------------------------------------------------------*/ 394 /* z0 = y0 + y6 */ 395 /* z1 = y1 + (y7 >> 2) */ 396 /* z2 = y2 + y4 */ 397 /* z3 = y3 + (y5 >> 2) */ 398 /* z4 = y2 - y4 */ 399 /* z5 = (y3 >> 2) - y5 */ 400 /* z6 = y0 - y6 */ 401 /* z7 = y7 - (y1 >> 2) */ 402 /*------------------------------------------------------------------*/ 403 i_z0 = i_y0 + i_y6; 404 i_z1 = i_y1 + (i_y7 >> 2); 405 i_z2 = i_y2 + i_y4; 406 i_z3 = i_y3 + (i_y5 >> 2); 407 i_z4 = i_y2 - i_y4; 408 i_z5 = (i_y3 >> 2) - i_y5; 409 i_z6 = i_y0 - i_y6; 410 i_z7 = i_y7 - (i_y1 >> 2); 411 412 /*------------------------------------------------------------------*/ 413 /* x0 = z0 + z7 */ 414 /* x1 = z2 + z5 */ 415 /* x2 = z4 + z3 */ 416 /* x3 = z6 + z1 */ 417 /* x4 = z6 - z1 */ 418 /* x5 = z4 - z3 */ 419 /* x6 = z2 - z5 */ 420 /* x7 = z0 - z7 */ 421 /*------------------------------------------------------------------*/ 422 pi2_tmp_ptr[0] = i_z0 + i_z7; 423 pi2_tmp_ptr[1] = i_z2 + i_z5; 424 pi2_tmp_ptr[2] = i_z4 + i_z3; 425 pi2_tmp_ptr[3] = i_z6 + i_z1; 426 pi2_tmp_ptr[4] = i_z6 - i_z1; 427 pi2_tmp_ptr[5] = i_z4 - i_z3; 428 pi2_tmp_ptr[6] = i_z2 - i_z5; 429 pi2_tmp_ptr[7] = i_z0 - i_z7; 430 431 /* move to the next row */ 432 //pi2_src_ptr += SUB_BLK_WIDTH_8x8; 433 pi2_tmp_ptr += SUB_BLK_WIDTH_8x8; 434 } 435 /*--------------------------------------------------------------------*/ 436 /* IDCT [ Vertical transformation] and Xij = (xij + 32)>>6 */ 437 /* */ 438 /* Add the prediction and store it back to reconstructed frame buffer */ 439 /* [Prediction buffer itself in this case] */ 440 /*--------------------------------------------------------------------*/ 441 442 pi2_tmp_ptr = pi2_tmp; 443 for(i = 0; i < SUB_BLK_WIDTH_8x8; i++) 444 { 445 pu1_pred_ptr = pu1_pred; 446 pu1_out = pu1_out_ptr; 447 /*------------------------------------------------------------------*/ 448 /* y0j = w0j + w4j */ 449 /* y1j = -w3j + w5j -w7j -(w7j >> 1) */ 450 /* y2j = w0j -w4j */ 451 /* y3j = w1j + w7j -w3j -(w3j >> 1) */ 452 /* y4j = ( w2j >> 1 ) -w6j */ 453 /* y5j = -w1j + w7j + w5j + (w5j >> 1) */ 454 /* y6j = w2j + ( w6j >> 1 ) */ 455 /* y7j = w3j + w5j + w1j + (w1j >> 1) */ 456 /*------------------------------------------------------------------*/ 457 i_y0 = pi2_tmp_ptr[0] + pi2_tmp_ptr[32]; 458 459 i_y1 = (WORD32)(-pi2_tmp_ptr[24]) + pi2_tmp_ptr[40] - pi2_tmp_ptr[56] 460 - (pi2_tmp_ptr[56] >> 1); 461 462 i_y2 = pi2_tmp_ptr[0] - pi2_tmp_ptr[32]; 463 464 i_y3 = (WORD32)pi2_tmp_ptr[8] + pi2_tmp_ptr[56] - pi2_tmp_ptr[24] 465 - (pi2_tmp_ptr[24] >> 1); 466 467 i_y4 = (pi2_tmp_ptr[16] >> 1) - pi2_tmp_ptr[48]; 468 469 i_y5 = (WORD32)(-pi2_tmp_ptr[8]) + pi2_tmp_ptr[56] + pi2_tmp_ptr[40] 470 + (pi2_tmp_ptr[40] >> 1); 471 472 i_y6 = pi2_tmp_ptr[16] + (pi2_tmp_ptr[48] >> 1); 473 474 i_y7 = (WORD32)pi2_tmp_ptr[24] + pi2_tmp_ptr[40] + pi2_tmp_ptr[8] 475 + (pi2_tmp_ptr[8] >> 1); 476 477 /*------------------------------------------------------------------*/ 478 /* z0j = y0j + y6j */ 479 /* z1j = y1j + (y7j >> 2) */ 480 /* z2j = y2j + y4j */ 481 /* z3j = y3j + (y5j >> 2) */ 482 /* z4j = y2j -y4j */ 483 /* z5j = (y3j >> 2) -y5j */ 484 /* z6j = y0j -y6j */ 485 /* z7j = y7j -(y1j >> 2) */ 486 /*------------------------------------------------------------------*/ 487 i_z0 = i_y0 + i_y6; 488 i_z1 = i_y1 + (i_y7 >> 2); 489 i_z2 = i_y2 + i_y4; 490 i_z3 = i_y3 + (i_y5 >> 2); 491 i_z4 = i_y2 - i_y4; 492 i_z5 = (i_y3 >> 2) - i_y5; 493 i_z6 = i_y0 - i_y6; 494 i_z7 = i_y7 - (i_y1 >> 2); 495 496 /*------------------------------------------------------------------*/ 497 /* x0j = z0j + z7j */ 498 /* x1j = z2j + z5j */ 499 /* x2j = z4j + z3j */ 500 /* x3j = z6j + z1j */ 501 /* x4j = z6j -z1j */ 502 /* x5j = z4j -z3j */ 503 /* x6j = z2j -z5j */ 504 /* x7j = z0j -z7j */ 505 /*------------------------------------------------------------------*/ 506 i_macro = ((i_z0 + i_z7 + 32) >> 6) + *pu1_pred_ptr; 507 *pu1_out = CLIP_U8(i_macro); 508 /* Change uc_recBuffer to Point to next element in the same column*/ 509 pu1_pred_ptr += pred_strd; 510 pu1_out += out_strd; 511 512 i_macro = ((i_z2 + i_z5 + 32) >> 6) + *pu1_pred_ptr; 513 *pu1_out = CLIP_U8(i_macro); 514 pu1_pred_ptr += pred_strd; 515 pu1_out += out_strd; 516 517 i_macro = ((i_z4 + i_z3 + 32) >> 6) + *pu1_pred_ptr; 518 *pu1_out = CLIP_U8(i_macro); 519 pu1_pred_ptr += pred_strd; 520 pu1_out += out_strd; 521 522 i_macro = ((i_z6 + i_z1 + 32) >> 6) + *pu1_pred_ptr; 523 *pu1_out = CLIP_U8(i_macro); 524 pu1_pred_ptr += pred_strd; 525 pu1_out += out_strd; 526 527 i_macro = ((i_z6 - i_z1 + 32) >> 6) + *pu1_pred_ptr; 528 *pu1_out = CLIP_U8(i_macro); 529 pu1_pred_ptr += pred_strd; 530 pu1_out += out_strd; 531 532 i_macro = ((i_z4 - i_z3 + 32) >> 6) + *pu1_pred_ptr; 533 *pu1_out = CLIP_U8(i_macro); 534 pu1_pred_ptr += pred_strd; 535 pu1_out += out_strd; 536 537 i_macro = ((i_z2 - i_z5 + 32) >> 6) + *pu1_pred_ptr; 538 *pu1_out = CLIP_U8(i_macro); 539 pu1_pred_ptr += pred_strd; 540 pu1_out += out_strd; 541 542 i_macro = ((i_z0 - i_z7 + 32) >> 6) + *pu1_pred_ptr; 543 *pu1_out = CLIP_U8(i_macro); 544 545 pi2_tmp_ptr++; 546 pu1_out_ptr++; 547 pu1_pred++; 548 } 549 } 550 551 void ih264_iquant_itrans_recon_8x8_dc(WORD16 *pi2_src, 552 UWORD8 *pu1_pred, 553 UWORD8 *pu1_out, 554 WORD32 pred_strd, 555 WORD32 out_strd, 556 const UWORD16 *pu2_iscale_mat, 557 const UWORD16 *pu2_weigh_mat, 558 UWORD32 qp_div, 559 WORD16 *pi2_tmp, 560 WORD32 iq_start_idx, 561 WORD16 *pi2_dc_ld_addr) 562 { 563 UWORD8 *pu1_pred_ptr = pu1_pred; 564 UWORD8 *pu1_out_ptr = pu1_out; 565 WORD16 x, i, i_macro; 566 WORD32 q; 567 WORD32 rnd_fact = (qp_div < 6) ? (1 << (5 - qp_div)) : 0; 568 UNUSED(pi2_tmp); 569 UNUSED(iq_start_idx); 570 UNUSED(pi2_dc_ld_addr); 571 /*************************************************************/ 572 /* Dequantization of coefficients. Will be replaced by SIMD */ 573 /* operations on platform. Note : DC coeff is not scaled */ 574 /*************************************************************/ 575 q = pi2_src[0]; 576 INV_QUANT(q, pu2_iscale_mat[0], pu2_weigh_mat[0], qp_div, rnd_fact, 6); 577 i_macro = (q + 32) >> 6; 578 /* Perform Inverse transform */ 579 /*--------------------------------------------------------------------*/ 580 /* IDCT [ Horizontal transformation ] */ 581 /*--------------------------------------------------------------------*/ 582 /*--------------------------------------------------------------------*/ 583 /* IDCT [ Vertical transformation] and Xij = (xij + 32)>>6 */ 584 /* */ 585 /* Add the prediction and store it back to reconstructed frame buffer */ 586 /* [Prediction buffer itself in this case] */ 587 /*--------------------------------------------------------------------*/ 588 for(i = 0; i < SUB_BLK_WIDTH_8x8; i++) 589 { 590 pu1_pred_ptr = pu1_pred; 591 pu1_out = pu1_out_ptr; 592 593 x = i_macro + *pu1_pred_ptr; 594 *pu1_out = CLIP_U8(x); 595 /* Change uc_recBuffer to Point to next element in the same column*/ 596 pu1_pred_ptr += pred_strd; 597 pu1_out += out_strd; 598 599 x = i_macro + *pu1_pred_ptr; 600 *pu1_out = CLIP_U8(x); 601 pu1_pred_ptr += pred_strd; 602 pu1_out += out_strd; 603 604 x = i_macro + *pu1_pred_ptr; 605 *pu1_out = CLIP_U8(x); 606 pu1_pred_ptr += pred_strd; 607 pu1_out += out_strd; 608 609 x = i_macro + *pu1_pred_ptr; 610 *pu1_out = CLIP_U8(x); 611 pu1_pred_ptr += pred_strd; 612 pu1_out += out_strd; 613 614 x = i_macro + *pu1_pred_ptr; 615 *pu1_out = CLIP_U8(x); 616 pu1_pred_ptr += pred_strd; 617 pu1_out += out_strd; 618 619 x = i_macro + *pu1_pred_ptr; 620 *pu1_out = CLIP_U8(x); 621 pu1_pred_ptr += pred_strd; 622 pu1_out += out_strd; 623 624 x = i_macro + *pu1_pred_ptr; 625 *pu1_out = CLIP_U8(x); 626 pu1_pred_ptr += pred_strd; 627 pu1_out += out_strd; 628 629 x = i_macro + *pu1_pred_ptr; 630 *pu1_out = CLIP_U8(x); 631 632 pu1_out_ptr++; 633 pu1_pred++; 634 } 635 } 636 637 /* 638 ******************************************************************************** 639 * 640 * @brief This function reconstructs a 4x4 sub block from quantized resiude and 641 * prediction buffer 642 * 643 * @par Description: 644 * The quantized residue is first inverse quantized, then inverse transformed. 645 * This inverse transformed content is added to the prediction buffer to recon- 646 * struct the end output 647 * 648 * @param[in] pi2_src 649 * quantized 4x4 block 650 * 651 * @param[in] pu1_pred 652 * prediction 4x4 block 653 * 654 * @param[out] pu1_out 655 * reconstructed 4x4 block 656 * 657 * @param[in] src_strd 658 * quantization buffer stride 659 * 660 * @param[in] pred_strd, 661 * Prediction buffer stride 662 * 663 * @param[in] out_strd 664 * recon buffer Stride 665 * 666 * @param[in] pu2_scaling_list 667 * pointer to scaling list 668 * 669 * @param[in] pu2_norm_adjust 670 * pointer to inverse scale matrix 671 * 672 * @param[in] u4_qp_div_6 673 * Floor (qp/6) 674 * 675 * @param[in] pi4_tmp 676 * temporary buffer of size 1*16 677 * 678 * @returns none 679 * 680 * @remarks none 681 * 682 ******************************************************************************* 683 */ 684 void ih264_iquant_itrans_recon_chroma_4x4(WORD16 *pi2_src, 685 UWORD8 *pu1_pred, 686 UWORD8 *pu1_out, 687 WORD32 pred_strd, 688 WORD32 out_strd, 689 const UWORD16 *pu2_iscal_mat, 690 const UWORD16 *pu2_weigh_mat, 691 UWORD32 u4_qp_div_6, 692 WORD16 *pi2_tmp, 693 WORD16 *pi2_dc_src) 694 { 695 WORD16 *pi2_src_ptr = pi2_src; 696 WORD16 *pi2_tmp_ptr = pi2_tmp; 697 UWORD8 *pu1_pred_ptr = pu1_pred; 698 UWORD8 *pu1_out_ptr = pu1_out; 699 WORD16 x0, x1, x2, x3, i; 700 WORD32 q0, q1, q2, q3; 701 WORD16 i_macro; 702 WORD16 rnd_fact = (u4_qp_div_6 < 4) ? 1 << (3 - u4_qp_div_6) : 0; 703 704 /* inverse quant */ 705 /*horizontal inverse transform */ 706 for(i = 0; i < SUB_BLK_WIDTH_4x4; i++) 707 { 708 if(i==0) 709 { 710 q0 = pi2_dc_src[0]; 711 } 712 else 713 { 714 q0 = pi2_src_ptr[0]; 715 INV_QUANT(q0, pu2_iscal_mat[0], pu2_weigh_mat[0], u4_qp_div_6, rnd_fact, 4); 716 } 717 718 q2 = pi2_src_ptr[2]; 719 INV_QUANT(q2, pu2_iscal_mat[2], pu2_weigh_mat[2], u4_qp_div_6, rnd_fact, 720 4); 721 722 x0 = q0 + q2; 723 x1 = q0 - q2; 724 725 q1 = pi2_src_ptr[1]; 726 INV_QUANT(q1, pu2_iscal_mat[1], pu2_weigh_mat[1], u4_qp_div_6, rnd_fact, 727 4); 728 729 q3 = pi2_src_ptr[3]; 730 INV_QUANT(q3, pu2_iscal_mat[3], pu2_weigh_mat[3], u4_qp_div_6, rnd_fact, 731 4); 732 733 x2 = (q1 >> 1) - q3; 734 x3 = q1 + (q3 >> 1); 735 736 pi2_tmp_ptr[0] = x0 + x3; 737 pi2_tmp_ptr[1] = x1 + x2; 738 pi2_tmp_ptr[2] = x1 - x2; 739 pi2_tmp_ptr[3] = x0 - x3; 740 741 pi2_src_ptr += SUB_BLK_WIDTH_4x4; 742 pi2_tmp_ptr += SUB_BLK_WIDTH_4x4; 743 pu2_iscal_mat += SUB_BLK_WIDTH_4x4; 744 pu2_weigh_mat += SUB_BLK_WIDTH_4x4; 745 } 746 747 /* vertical inverse transform */ 748 pi2_tmp_ptr = pi2_tmp; 749 for(i = 0; i < SUB_BLK_WIDTH_4x4; i++) 750 { 751 pu1_pred_ptr = pu1_pred; 752 pu1_out = pu1_out_ptr; 753 754 x0 = (pi2_tmp_ptr[0] + pi2_tmp_ptr[8]); 755 x1 = (pi2_tmp_ptr[0] - pi2_tmp_ptr[8]); 756 x2 = (pi2_tmp_ptr[4] >> 1) - pi2_tmp_ptr[12]; 757 x3 = pi2_tmp_ptr[4] + (pi2_tmp_ptr[12] >> 1); 758 759 /* inverse prediction */ 760 i_macro = x0 + x3; 761 i_macro = ((i_macro + 32) >> 6); 762 i_macro += *pu1_pred_ptr; 763 *pu1_out = CLIP_U8(i_macro); 764 pu1_pred_ptr += pred_strd; 765 pu1_out += out_strd; 766 767 i_macro = x1 + x2; 768 i_macro = ((i_macro + 32) >> 6); 769 i_macro += *pu1_pred_ptr; 770 *pu1_out = CLIP_U8(i_macro); 771 pu1_pred_ptr += pred_strd; 772 pu1_out += out_strd; 773 774 i_macro = x1 - x2; 775 i_macro = ((i_macro + 32) >> 6); 776 i_macro += *pu1_pred_ptr; 777 *pu1_out = CLIP_U8(i_macro); 778 pu1_pred_ptr += pred_strd; 779 pu1_out += out_strd; 780 781 i_macro = x0 - x3; 782 i_macro = ((i_macro + 32) >> 6); 783 i_macro += *pu1_pred_ptr; 784 *pu1_out = CLIP_U8(i_macro); 785 786 pi2_tmp_ptr++; 787 pu1_out_ptr+= 2; //Interleaved store for output 788 pu1_pred+= 2; //Interleaved load for pred buffer 789 } 790 } 791 792 /* 793 ******************************************************************************** 794 * 795 * @brief This function reconstructs a 4x4 sub block from quantized resiude and 796 * prediction buffer if only dc value is present for residue 797 * 798 * @par Description: 799 * The quantized residue is first inverse quantized, 800 * This inverse quantized content is added to the prediction buffer to recon- 801 * struct the end output 802 * 803 * @param[in] pi2_src 804 * quantized dc coefficient 805 * 806 * @param[in] pu1_pred 807 * prediction 4x4 block in interleaved format 808 * 809 * @param[in] pred_strd, 810 * Prediction buffer stride in interleaved format 811 * 812 * @param[in] out_strd 813 * recon buffer Stride 814 * 815 * @returns none 816 * 817 * @remarks none 818 * 819 ******************************************************************************* 820 */ 821 822 void ih264_iquant_itrans_recon_chroma_4x4_dc(WORD16 *pi2_src, 823 UWORD8 *pu1_pred, 824 UWORD8 *pu1_out, 825 WORD32 pred_strd, 826 WORD32 out_strd, 827 const UWORD16 *pu2_iscal_mat, 828 const UWORD16 *pu2_weigh_mat, 829 UWORD32 u4_qp_div_6, 830 WORD16 *pi2_tmp, 831 WORD16 *pi2_dc_src) 832 { 833 UWORD8 *pu1_pred_ptr = pu1_pred; 834 UWORD8 *pu1_out_ptr = pu1_out; 835 WORD32 q0; 836 WORD16 x, i_macro, i; 837 UNUSED(pi2_src); 838 UNUSED(pu2_iscal_mat); 839 UNUSED(pu2_weigh_mat); 840 UNUSED(u4_qp_div_6); 841 UNUSED(pi2_tmp); 842 843 q0 = pi2_dc_src[0]; // Restoring dc value for intra case3 844 i_macro = ((q0 + 32) >> 6); 845 846 for(i = 0; i < SUB_BLK_WIDTH_4x4; i++) 847 { 848 pu1_pred_ptr = pu1_pred; 849 pu1_out = pu1_out_ptr; 850 851 /* inverse prediction */ 852 x = i_macro + *pu1_pred_ptr; 853 *pu1_out = CLIP_U8(x); 854 pu1_pred_ptr += pred_strd; 855 pu1_out += out_strd; 856 857 x = i_macro + *pu1_pred_ptr; 858 *pu1_out = CLIP_U8(x); 859 pu1_pred_ptr += pred_strd; 860 pu1_out += out_strd; 861 862 x = i_macro + *pu1_pred_ptr; 863 *pu1_out = CLIP_U8(x); 864 pu1_pred_ptr += pred_strd; 865 pu1_out += out_strd; 866 867 x = i_macro + *pu1_pred_ptr; 868 *pu1_out = CLIP_U8(x); 869 870 pu1_out_ptr+=2; 871 pu1_pred+=2; 872 } 873 } 874
