Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 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 | } |