1 /* 2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 12 #include "onyxd_int.h" 13 #include "header.h" 14 #include "reconintra.h" 15 #include "reconintra4x4.h" 16 #include "recon.h" 17 #include "reconinter.h" 18 #include "dequantize.h" 19 #include "detokenize.h" 20 #include "invtrans.h" 21 #include "alloccommon.h" 22 #include "entropymode.h" 23 #include "quant_common.h" 24 #include "vpx_scale/vpxscale.h" 25 #include "vpx_scale/yv12extend.h" 26 #include "setupintrarecon.h" 27 28 #include "decodemv.h" 29 #include "extend.h" 30 #include "vpx_mem/vpx_mem.h" 31 #include "idct.h" 32 #include "dequantize.h" 33 #include "predictdc.h" 34 #include "threading.h" 35 #include "decoderthreading.h" 36 #include "dboolhuff.h" 37 38 #include <assert.h> 39 #include <stdio.h> 40 41 void vp8cx_init_de_quantizer(VP8D_COMP *pbi) 42 { 43 int i; 44 int Q; 45 VP8_COMMON *const pc = & pbi->common; 46 47 for (Q = 0; Q < QINDEX_RANGE; Q++) 48 { 49 pc->Y1dequant[Q][0] = (short)vp8_dc_quant(Q, pc->y1dc_delta_q); 50 pc->Y2dequant[Q][0] = (short)vp8_dc2quant(Q, pc->y2dc_delta_q); 51 pc->UVdequant[Q][0] = (short)vp8_dc_uv_quant(Q, pc->uvdc_delta_q); 52 53 /* all the ac values = ; */ 54 for (i = 1; i < 16; i++) 55 { 56 int rc = vp8_default_zig_zag1d[i]; 57 58 pc->Y1dequant[Q][rc] = (short)vp8_ac_yquant(Q); 59 pc->Y2dequant[Q][rc] = (short)vp8_ac2quant(Q, pc->y2ac_delta_q); 60 pc->UVdequant[Q][rc] = (short)vp8_ac_uv_quant(Q, pc->uvac_delta_q); 61 } 62 } 63 } 64 65 void mb_init_dequantizer(VP8D_COMP *pbi, MACROBLOCKD *xd) 66 { 67 int i; 68 int QIndex; 69 MB_MODE_INFO *mbmi = &xd->mode_info_context->mbmi; 70 VP8_COMMON *const pc = & pbi->common; 71 72 /* Decide whether to use the default or alternate baseline Q value. */ 73 if (xd->segmentation_enabled) 74 { 75 /* Abs Value */ 76 if (xd->mb_segement_abs_delta == SEGMENT_ABSDATA) 77 QIndex = xd->segment_feature_data[MB_LVL_ALT_Q][mbmi->segment_id]; 78 79 /* Delta Value */ 80 else 81 { 82 QIndex = pc->base_qindex + xd->segment_feature_data[MB_LVL_ALT_Q][mbmi->segment_id]; 83 QIndex = (QIndex >= 0) ? ((QIndex <= MAXQ) ? QIndex : MAXQ) : 0; /* Clamp to valid range */ 84 } 85 } 86 else 87 QIndex = pc->base_qindex; 88 89 /* Set up the block level dequant pointers */ 90 for (i = 0; i < 16; i++) 91 { 92 xd->block[i].dequant = pc->Y1dequant[QIndex]; 93 } 94 95 for (i = 16; i < 24; i++) 96 { 97 xd->block[i].dequant = pc->UVdequant[QIndex]; 98 } 99 100 xd->block[24].dequant = pc->Y2dequant[QIndex]; 101 102 } 103 104 #if CONFIG_RUNTIME_CPU_DETECT 105 #define RTCD_VTABLE(x) (&(pbi)->common.rtcd.x) 106 #else 107 #define RTCD_VTABLE(x) NULL 108 #endif 109 110 /* skip_recon_mb() is Modified: Instead of writing the result to predictor buffer and then copying it 111 * to dst buffer, we can write the result directly to dst buffer. This eliminates unnecessary copy. 112 */ 113 static void skip_recon_mb(VP8D_COMP *pbi, MACROBLOCKD *xd) 114 { 115 if (xd->frame_type == KEY_FRAME || xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME) 116 { 117 118 vp8_build_intra_predictors_mbuv_s(xd); 119 vp8_build_intra_predictors_mby_s_ptr(xd); 120 121 } 122 else 123 { 124 vp8_build_inter_predictors_mb_s(xd); 125 } 126 } 127 128 static void clamp_mv_to_umv_border(MV *mv, const MACROBLOCKD *xd) 129 { 130 /* If the MV points so far into the UMV border that no visible pixels 131 * are used for reconstruction, the subpel part of the MV can be 132 * discarded and the MV limited to 16 pixels with equivalent results. 133 * 134 * This limit kicks in at 19 pixels for the top and left edges, for 135 * the 16 pixels plus 3 taps right of the central pixel when subpel 136 * filtering. The bottom and right edges use 16 pixels plus 2 pixels 137 * left of the central pixel when filtering. 138 */ 139 if (mv->col < (xd->mb_to_left_edge - (19 << 3))) 140 mv->col = xd->mb_to_left_edge - (16 << 3); 141 else if (mv->col > xd->mb_to_right_edge + (18 << 3)) 142 mv->col = xd->mb_to_right_edge + (16 << 3); 143 144 if (mv->row < (xd->mb_to_top_edge - (19 << 3))) 145 mv->row = xd->mb_to_top_edge - (16 << 3); 146 else if (mv->row > xd->mb_to_bottom_edge + (18 << 3)) 147 mv->row = xd->mb_to_bottom_edge + (16 << 3); 148 } 149 150 /* A version of the above function for chroma block MVs.*/ 151 static void clamp_uvmv_to_umv_border(MV *mv, const MACROBLOCKD *xd) 152 { 153 mv->col = (2*mv->col < (xd->mb_to_left_edge - (19 << 3))) ? (xd->mb_to_left_edge - (16 << 3)) >> 1 : mv->col; 154 mv->col = (2*mv->col > xd->mb_to_right_edge + (18 << 3)) ? (xd->mb_to_right_edge + (16 << 3)) >> 1 : mv->col; 155 156 mv->row = (2*mv->row < (xd->mb_to_top_edge - (19 << 3))) ? (xd->mb_to_top_edge - (16 << 3)) >> 1 : mv->row; 157 mv->row = (2*mv->row > xd->mb_to_bottom_edge + (18 << 3)) ? (xd->mb_to_bottom_edge + (16 << 3)) >> 1 : mv->row; 158 } 159 160 void clamp_mvs(MACROBLOCKD *xd) 161 { 162 if (xd->mode_info_context->mbmi.mode == SPLITMV) 163 { 164 int i; 165 166 for (i=0; i<16; i++) 167 clamp_mv_to_umv_border(&xd->block[i].bmi.mv.as_mv, xd); 168 for (i=16; i<24; i++) 169 clamp_uvmv_to_umv_border(&xd->block[i].bmi.mv.as_mv, xd); 170 } 171 else 172 { 173 clamp_mv_to_umv_border(&xd->mode_info_context->mbmi.mv.as_mv, xd); 174 clamp_uvmv_to_umv_border(&xd->block[16].bmi.mv.as_mv, xd); 175 } 176 177 } 178 179 void vp8_decode_macroblock(VP8D_COMP *pbi, MACROBLOCKD *xd) 180 { 181 int eobtotal = 0; 182 int i, do_clamp = xd->mode_info_context->mbmi.need_to_clamp_mvs; 183 184 if (xd->mode_info_context->mbmi.mb_skip_coeff) 185 { 186 vp8_reset_mb_tokens_context(xd); 187 } 188 else 189 { 190 eobtotal = vp8_decode_mb_tokens(pbi, xd); 191 } 192 193 /* Perform temporary clamping of the MV to be used for prediction */ 194 if (do_clamp) 195 { 196 clamp_mvs(xd); 197 } 198 199 xd->mode_info_context->mbmi.dc_diff = 1; 200 201 if (xd->mode_info_context->mbmi.mode != B_PRED && xd->mode_info_context->mbmi.mode != SPLITMV && eobtotal == 0) 202 { 203 xd->mode_info_context->mbmi.dc_diff = 0; 204 skip_recon_mb(pbi, xd); 205 return; 206 } 207 208 if (xd->segmentation_enabled) 209 mb_init_dequantizer(pbi, xd); 210 211 /* do prediction */ 212 if (xd->frame_type == KEY_FRAME || xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME) 213 { 214 vp8_build_intra_predictors_mbuv(xd); 215 216 if (xd->mode_info_context->mbmi.mode != B_PRED) 217 { 218 vp8_build_intra_predictors_mby_ptr(xd); 219 } else { 220 vp8_intra_prediction_down_copy(xd); 221 } 222 } 223 else 224 { 225 vp8_build_inter_predictors_mb(xd); 226 } 227 228 /* dequantization and idct */ 229 if (xd->mode_info_context->mbmi.mode != B_PRED && xd->mode_info_context->mbmi.mode != SPLITMV) 230 { 231 BLOCKD *b = &xd->block[24]; 232 DEQUANT_INVOKE(&pbi->dequant, block)(b); 233 234 /* do 2nd order transform on the dc block */ 235 if (xd->eobs[24] > 1) 236 { 237 IDCT_INVOKE(RTCD_VTABLE(idct), iwalsh16)(&b->dqcoeff[0], b->diff); 238 ((int *)b->qcoeff)[0] = 0; 239 ((int *)b->qcoeff)[1] = 0; 240 ((int *)b->qcoeff)[2] = 0; 241 ((int *)b->qcoeff)[3] = 0; 242 ((int *)b->qcoeff)[4] = 0; 243 ((int *)b->qcoeff)[5] = 0; 244 ((int *)b->qcoeff)[6] = 0; 245 ((int *)b->qcoeff)[7] = 0; 246 } 247 else 248 { 249 IDCT_INVOKE(RTCD_VTABLE(idct), iwalsh1)(&b->dqcoeff[0], b->diff); 250 ((int *)b->qcoeff)[0] = 0; 251 } 252 253 DEQUANT_INVOKE (&pbi->dequant, dc_idct_add_y_block) 254 (xd->qcoeff, xd->block[0].dequant, 255 xd->predictor, xd->dst.y_buffer, 256 xd->dst.y_stride, xd->eobs, xd->block[24].diff); 257 } 258 else if ((xd->frame_type == KEY_FRAME || xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME) && xd->mode_info_context->mbmi.mode == B_PRED) 259 { 260 for (i = 0; i < 16; i++) 261 { 262 263 BLOCKD *b = &xd->block[i]; 264 vp8_predict_intra4x4(b, b->bmi.mode, b->predictor); 265 266 if (xd->eobs[i] > 1) 267 { 268 DEQUANT_INVOKE(&pbi->dequant, idct_add) 269 (b->qcoeff, b->dequant, b->predictor, 270 *(b->base_dst) + b->dst, 16, b->dst_stride); 271 } 272 else 273 { 274 IDCT_INVOKE(RTCD_VTABLE(idct), idct1_scalar_add) 275 (b->qcoeff[0] * b->dequant[0], b->predictor, 276 *(b->base_dst) + b->dst, 16, b->dst_stride); 277 ((int *)b->qcoeff)[0] = 0; 278 } 279 } 280 281 } 282 else 283 { 284 DEQUANT_INVOKE (&pbi->dequant, idct_add_y_block) 285 (xd->qcoeff, xd->block[0].dequant, 286 xd->predictor, xd->dst.y_buffer, 287 xd->dst.y_stride, xd->eobs); 288 } 289 290 DEQUANT_INVOKE (&pbi->dequant, idct_add_uv_block) 291 (xd->qcoeff+16*16, xd->block[16].dequant, 292 xd->predictor+16*16, xd->dst.u_buffer, xd->dst.v_buffer, 293 xd->dst.uv_stride, xd->eobs+16); 294 } 295 296 297 static int get_delta_q(vp8_reader *bc, int prev, int *q_update) 298 { 299 int ret_val = 0; 300 301 if (vp8_read_bit(bc)) 302 { 303 ret_val = vp8_read_literal(bc, 4); 304 305 if (vp8_read_bit(bc)) 306 ret_val = -ret_val; 307 } 308 309 /* Trigger a quantizer update if the delta-q value has changed */ 310 if (ret_val != prev) 311 *q_update = 1; 312 313 return ret_val; 314 } 315 316 #ifdef PACKET_TESTING 317 #include <stdio.h> 318 FILE *vpxlog = 0; 319 #endif 320 321 322 323 void vp8_decode_mb_row(VP8D_COMP *pbi, 324 VP8_COMMON *pc, 325 int mb_row, 326 MACROBLOCKD *xd) 327 { 328 329 int i; 330 int recon_yoffset, recon_uvoffset; 331 int mb_col; 332 int ref_fb_idx = pc->lst_fb_idx; 333 int dst_fb_idx = pc->new_fb_idx; 334 int recon_y_stride = pc->yv12_fb[ref_fb_idx].y_stride; 335 int recon_uv_stride = pc->yv12_fb[ref_fb_idx].uv_stride; 336 337 vpx_memset(&pc->left_context, 0, sizeof(pc->left_context)); 338 recon_yoffset = mb_row * recon_y_stride * 16; 339 recon_uvoffset = mb_row * recon_uv_stride * 8; 340 /* reset above block coeffs */ 341 342 xd->above_context = pc->above_context; 343 xd->up_available = (mb_row != 0); 344 345 xd->mb_to_top_edge = -((mb_row * 16)) << 3; 346 xd->mb_to_bottom_edge = ((pc->mb_rows - 1 - mb_row) * 16) << 3; 347 348 for (mb_col = 0; mb_col < pc->mb_cols; mb_col++) 349 { 350 351 if (xd->mode_info_context->mbmi.mode == SPLITMV || xd->mode_info_context->mbmi.mode == B_PRED) 352 { 353 for (i = 0; i < 16; i++) 354 { 355 BLOCKD *d = &xd->block[i]; 356 vpx_memcpy(&d->bmi, &xd->mode_info_context->bmi[i], sizeof(B_MODE_INFO)); 357 } 358 } 359 360 /* Distance of Mb to the various image edges. 361 * These are specified to 8th pel as they are always compared to values that are in 1/8th pel units 362 */ 363 xd->mb_to_left_edge = -((mb_col * 16) << 3); 364 xd->mb_to_right_edge = ((pc->mb_cols - 1 - mb_col) * 16) << 3; 365 366 xd->dst.y_buffer = pc->yv12_fb[dst_fb_idx].y_buffer + recon_yoffset; 367 xd->dst.u_buffer = pc->yv12_fb[dst_fb_idx].u_buffer + recon_uvoffset; 368 xd->dst.v_buffer = pc->yv12_fb[dst_fb_idx].v_buffer + recon_uvoffset; 369 370 xd->left_available = (mb_col != 0); 371 372 /* Select the appropriate reference frame for this MB */ 373 if (xd->mode_info_context->mbmi.ref_frame == LAST_FRAME) 374 ref_fb_idx = pc->lst_fb_idx; 375 else if (xd->mode_info_context->mbmi.ref_frame == GOLDEN_FRAME) 376 ref_fb_idx = pc->gld_fb_idx; 377 else 378 ref_fb_idx = pc->alt_fb_idx; 379 380 xd->pre.y_buffer = pc->yv12_fb[ref_fb_idx].y_buffer + recon_yoffset; 381 xd->pre.u_buffer = pc->yv12_fb[ref_fb_idx].u_buffer + recon_uvoffset; 382 xd->pre.v_buffer = pc->yv12_fb[ref_fb_idx].v_buffer + recon_uvoffset; 383 384 vp8_build_uvmvs(xd, pc->full_pixel); 385 386 /* 387 if(pc->current_video_frame==0 &&mb_col==1 && mb_row==0) 388 pbi->debugoutput =1; 389 else 390 pbi->debugoutput =0; 391 */ 392 vp8_decode_macroblock(pbi, xd); 393 394 395 recon_yoffset += 16; 396 recon_uvoffset += 8; 397 398 ++xd->mode_info_context; /* next mb */ 399 400 xd->above_context++; 401 402 } 403 404 /* adjust to the next row of mbs */ 405 vp8_extend_mb_row( 406 &pc->yv12_fb[dst_fb_idx], 407 xd->dst.y_buffer + 16, xd->dst.u_buffer + 8, xd->dst.v_buffer + 8 408 ); 409 410 ++xd->mode_info_context; /* skip prediction column */ 411 } 412 413 414 static unsigned int read_partition_size(const unsigned char *cx_size) 415 { 416 const unsigned int size = 417 cx_size[0] + (cx_size[1] << 8) + (cx_size[2] << 16); 418 return size; 419 } 420 421 422 static void setup_token_decoder(VP8D_COMP *pbi, 423 const unsigned char *cx_data) 424 { 425 int num_part; 426 int i; 427 VP8_COMMON *pc = &pbi->common; 428 const unsigned char *user_data_end = pbi->Source + pbi->source_sz; 429 vp8_reader *bool_decoder; 430 const unsigned char *partition; 431 432 /* Parse number of token partitions to use */ 433 pc->multi_token_partition = (TOKEN_PARTITION)vp8_read_literal(&pbi->bc, 2); 434 num_part = 1 << pc->multi_token_partition; 435 436 /* Set up pointers to the first partition */ 437 partition = cx_data; 438 bool_decoder = &pbi->bc2; 439 440 if (num_part > 1) 441 { 442 CHECK_MEM_ERROR(pbi->mbc, vpx_malloc(num_part * sizeof(vp8_reader))); 443 bool_decoder = pbi->mbc; 444 partition += 3 * (num_part - 1); 445 } 446 447 for (i = 0; i < num_part; i++) 448 { 449 const unsigned char *partition_size_ptr = cx_data + i * 3; 450 ptrdiff_t partition_size; 451 452 /* Calculate the length of this partition. The last partition 453 * size is implicit. 454 */ 455 if (i < num_part - 1) 456 { 457 partition_size = read_partition_size(partition_size_ptr); 458 } 459 else 460 { 461 partition_size = user_data_end - partition; 462 } 463 464 if (partition + partition_size > user_data_end 465 || partition + partition_size < partition) 466 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME, 467 "Truncated packet or corrupt partition " 468 "%d length", i + 1); 469 470 if (vp8dx_start_decode(bool_decoder, IF_RTCD(&pbi->dboolhuff), 471 partition, partition_size)) 472 vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR, 473 "Failed to allocate bool decoder %d", i + 1); 474 475 /* Advance to the next partition */ 476 partition += partition_size; 477 bool_decoder++; 478 } 479 480 /* Clamp number of decoder threads */ 481 if (pbi->decoding_thread_count > num_part - 1) 482 pbi->decoding_thread_count = num_part - 1; 483 } 484 485 486 static void stop_token_decoder(VP8D_COMP *pbi) 487 { 488 int i; 489 VP8_COMMON *pc = &pbi->common; 490 491 if (pc->multi_token_partition != ONE_PARTITION) 492 vpx_free(pbi->mbc); 493 } 494 495 static void init_frame(VP8D_COMP *pbi) 496 { 497 VP8_COMMON *const pc = & pbi->common; 498 MACROBLOCKD *const xd = & pbi->mb; 499 500 if (pc->frame_type == KEY_FRAME) 501 { 502 /* Various keyframe initializations */ 503 vpx_memcpy(pc->fc.mvc, vp8_default_mv_context, sizeof(vp8_default_mv_context)); 504 505 vp8_init_mbmode_probs(pc); 506 507 vp8_default_coef_probs(pc); 508 vp8_kf_default_bmode_probs(pc->kf_bmode_prob); 509 510 /* reset the segment feature data to 0 with delta coding (Default state). */ 511 vpx_memset(xd->segment_feature_data, 0, sizeof(xd->segment_feature_data)); 512 xd->mb_segement_abs_delta = SEGMENT_DELTADATA; 513 514 /* reset the mode ref deltasa for loop filter */ 515 vpx_memset(xd->ref_lf_deltas, 0, sizeof(xd->ref_lf_deltas)); 516 vpx_memset(xd->mode_lf_deltas, 0, sizeof(xd->mode_lf_deltas)); 517 518 /* All buffers are implicitly updated on key frames. */ 519 pc->refresh_golden_frame = 1; 520 pc->refresh_alt_ref_frame = 1; 521 pc->copy_buffer_to_gf = 0; 522 pc->copy_buffer_to_arf = 0; 523 524 /* Note that Golden and Altref modes cannot be used on a key frame so 525 * ref_frame_sign_bias[] is undefined and meaningless 526 */ 527 pc->ref_frame_sign_bias[GOLDEN_FRAME] = 0; 528 pc->ref_frame_sign_bias[ALTREF_FRAME] = 0; 529 } 530 else 531 { 532 if (!pc->use_bilinear_mc_filter) 533 pc->mcomp_filter_type = SIXTAP; 534 else 535 pc->mcomp_filter_type = BILINEAR; 536 537 /* To enable choice of different interploation filters */ 538 if (pc->mcomp_filter_type == SIXTAP) 539 { 540 xd->subpixel_predict = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap4x4); 541 xd->subpixel_predict8x4 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap8x4); 542 xd->subpixel_predict8x8 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap8x8); 543 xd->subpixel_predict16x16 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap16x16); 544 } 545 else 546 { 547 xd->subpixel_predict = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear4x4); 548 xd->subpixel_predict8x4 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear8x4); 549 xd->subpixel_predict8x8 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear8x8); 550 xd->subpixel_predict16x16 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear16x16); 551 } 552 } 553 554 xd->left_context = &pc->left_context; 555 xd->mode_info_context = pc->mi; 556 xd->frame_type = pc->frame_type; 557 xd->mode_info_context->mbmi.mode = DC_PRED; 558 xd->mode_info_stride = pc->mode_info_stride; 559 } 560 561 int vp8_decode_frame(VP8D_COMP *pbi) 562 { 563 vp8_reader *const bc = & pbi->bc; 564 VP8_COMMON *const pc = & pbi->common; 565 MACROBLOCKD *const xd = & pbi->mb; 566 const unsigned char *data = (const unsigned char *)pbi->Source; 567 const unsigned char *const data_end = data + pbi->source_sz; 568 ptrdiff_t first_partition_length_in_bytes; 569 570 int mb_row; 571 int i, j, k, l; 572 const int *const mb_feature_data_bits = vp8_mb_feature_data_bits; 573 574 if (data_end - data < 3) 575 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME, 576 "Truncated packet"); 577 pc->frame_type = (FRAME_TYPE)(data[0] & 1); 578 pc->version = (data[0] >> 1) & 7; 579 pc->show_frame = (data[0] >> 4) & 1; 580 first_partition_length_in_bytes = 581 (data[0] | (data[1] << 8) | (data[2] << 16)) >> 5; 582 data += 3; 583 584 if (data + first_partition_length_in_bytes > data_end 585 || data + first_partition_length_in_bytes < data) 586 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME, 587 "Truncated packet or corrupt partition 0 length"); 588 vp8_setup_version(pc); 589 590 if (pc->frame_type == KEY_FRAME) 591 { 592 const int Width = pc->Width; 593 const int Height = pc->Height; 594 595 /* vet via sync code */ 596 if (data[0] != 0x9d || data[1] != 0x01 || data[2] != 0x2a) 597 vpx_internal_error(&pc->error, VPX_CODEC_UNSUP_BITSTREAM, 598 "Invalid frame sync code"); 599 600 pc->Width = (data[3] | (data[4] << 8)) & 0x3fff; 601 pc->horiz_scale = data[4] >> 6; 602 pc->Height = (data[5] | (data[6] << 8)) & 0x3fff; 603 pc->vert_scale = data[6] >> 6; 604 data += 7; 605 606 if (Width != pc->Width || Height != pc->Height) 607 { 608 int prev_mb_rows = pc->mb_rows; 609 610 if (pc->Width <= 0) 611 { 612 pc->Width = Width; 613 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME, 614 "Invalid frame width"); 615 } 616 617 if (pc->Height <= 0) 618 { 619 pc->Height = Height; 620 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME, 621 "Invalid frame height"); 622 } 623 624 if (vp8_alloc_frame_buffers(pc, pc->Width, pc->Height)) 625 vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR, 626 "Failed to allocate frame buffers"); 627 628 #if CONFIG_MULTITHREAD 629 if (pbi->b_multithreaded_rd) 630 vp8mt_alloc_temp_buffers(pbi, pc->Width, prev_mb_rows); 631 #endif 632 } 633 } 634 635 if (pc->Width == 0 || pc->Height == 0) 636 { 637 return -1; 638 } 639 640 init_frame(pbi); 641 642 if (vp8dx_start_decode(bc, IF_RTCD(&pbi->dboolhuff), 643 data, data_end - data)) 644 vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR, 645 "Failed to allocate bool decoder 0"); 646 if (pc->frame_type == KEY_FRAME) { 647 pc->clr_type = (YUV_TYPE)vp8_read_bit(bc); 648 pc->clamp_type = (CLAMP_TYPE)vp8_read_bit(bc); 649 } 650 651 /* Is segmentation enabled */ 652 xd->segmentation_enabled = (unsigned char)vp8_read_bit(bc); 653 654 if (xd->segmentation_enabled) 655 { 656 /* Signal whether or not the segmentation map is being explicitly updated this frame. */ 657 xd->update_mb_segmentation_map = (unsigned char)vp8_read_bit(bc); 658 xd->update_mb_segmentation_data = (unsigned char)vp8_read_bit(bc); 659 660 if (xd->update_mb_segmentation_data) 661 { 662 xd->mb_segement_abs_delta = (unsigned char)vp8_read_bit(bc); 663 664 vpx_memset(xd->segment_feature_data, 0, sizeof(xd->segment_feature_data)); 665 666 /* For each segmentation feature (Quant and loop filter level) */ 667 for (i = 0; i < MB_LVL_MAX; i++) 668 { 669 for (j = 0; j < MAX_MB_SEGMENTS; j++) 670 { 671 /* Frame level data */ 672 if (vp8_read_bit(bc)) 673 { 674 xd->segment_feature_data[i][j] = (signed char)vp8_read_literal(bc, mb_feature_data_bits[i]); 675 676 if (vp8_read_bit(bc)) 677 xd->segment_feature_data[i][j] = -xd->segment_feature_data[i][j]; 678 } 679 else 680 xd->segment_feature_data[i][j] = 0; 681 } 682 } 683 } 684 685 if (xd->update_mb_segmentation_map) 686 { 687 /* Which macro block level features are enabled */ 688 vpx_memset(xd->mb_segment_tree_probs, 255, sizeof(xd->mb_segment_tree_probs)); 689 690 /* Read the probs used to decode the segment id for each macro block. */ 691 for (i = 0; i < MB_FEATURE_TREE_PROBS; i++) 692 { 693 /* If not explicitly set value is defaulted to 255 by memset above */ 694 if (vp8_read_bit(bc)) 695 xd->mb_segment_tree_probs[i] = (vp8_prob)vp8_read_literal(bc, 8); 696 } 697 } 698 } 699 700 /* Read the loop filter level and type */ 701 pc->filter_type = (LOOPFILTERTYPE) vp8_read_bit(bc); 702 pc->filter_level = vp8_read_literal(bc, 6); 703 pc->sharpness_level = vp8_read_literal(bc, 3); 704 705 /* Read in loop filter deltas applied at the MB level based on mode or ref frame. */ 706 xd->mode_ref_lf_delta_update = 0; 707 xd->mode_ref_lf_delta_enabled = (unsigned char)vp8_read_bit(bc); 708 709 if (xd->mode_ref_lf_delta_enabled) 710 { 711 /* Do the deltas need to be updated */ 712 xd->mode_ref_lf_delta_update = (unsigned char)vp8_read_bit(bc); 713 714 if (xd->mode_ref_lf_delta_update) 715 { 716 /* Send update */ 717 for (i = 0; i < MAX_REF_LF_DELTAS; i++) 718 { 719 if (vp8_read_bit(bc)) 720 { 721 /*sign = vp8_read_bit( bc );*/ 722 xd->ref_lf_deltas[i] = (signed char)vp8_read_literal(bc, 6); 723 724 if (vp8_read_bit(bc)) /* Apply sign */ 725 xd->ref_lf_deltas[i] = xd->ref_lf_deltas[i] * -1; 726 } 727 } 728 729 /* Send update */ 730 for (i = 0; i < MAX_MODE_LF_DELTAS; i++) 731 { 732 if (vp8_read_bit(bc)) 733 { 734 /*sign = vp8_read_bit( bc );*/ 735 xd->mode_lf_deltas[i] = (signed char)vp8_read_literal(bc, 6); 736 737 if (vp8_read_bit(bc)) /* Apply sign */ 738 xd->mode_lf_deltas[i] = xd->mode_lf_deltas[i] * -1; 739 } 740 } 741 } 742 } 743 744 setup_token_decoder(pbi, data + first_partition_length_in_bytes); 745 xd->current_bc = &pbi->bc2; 746 747 /* Read the default quantizers. */ 748 { 749 int Q, q_update; 750 751 Q = vp8_read_literal(bc, 7); /* AC 1st order Q = default */ 752 pc->base_qindex = Q; 753 q_update = 0; 754 pc->y1dc_delta_q = get_delta_q(bc, pc->y1dc_delta_q, &q_update); 755 pc->y2dc_delta_q = get_delta_q(bc, pc->y2dc_delta_q, &q_update); 756 pc->y2ac_delta_q = get_delta_q(bc, pc->y2ac_delta_q, &q_update); 757 pc->uvdc_delta_q = get_delta_q(bc, pc->uvdc_delta_q, &q_update); 758 pc->uvac_delta_q = get_delta_q(bc, pc->uvac_delta_q, &q_update); 759 760 if (q_update) 761 vp8cx_init_de_quantizer(pbi); 762 763 /* MB level dequantizer setup */ 764 mb_init_dequantizer(pbi, &pbi->mb); 765 } 766 767 /* Determine if the golden frame or ARF buffer should be updated and how. 768 * For all non key frames the GF and ARF refresh flags and sign bias 769 * flags must be set explicitly. 770 */ 771 if (pc->frame_type != KEY_FRAME) 772 { 773 /* Should the GF or ARF be updated from the current frame */ 774 pc->refresh_golden_frame = vp8_read_bit(bc); 775 pc->refresh_alt_ref_frame = vp8_read_bit(bc); 776 777 /* Buffer to buffer copy flags. */ 778 pc->copy_buffer_to_gf = 0; 779 780 if (!pc->refresh_golden_frame) 781 pc->copy_buffer_to_gf = vp8_read_literal(bc, 2); 782 783 pc->copy_buffer_to_arf = 0; 784 785 if (!pc->refresh_alt_ref_frame) 786 pc->copy_buffer_to_arf = vp8_read_literal(bc, 2); 787 788 pc->ref_frame_sign_bias[GOLDEN_FRAME] = vp8_read_bit(bc); 789 pc->ref_frame_sign_bias[ALTREF_FRAME] = vp8_read_bit(bc); 790 } 791 792 pc->refresh_entropy_probs = vp8_read_bit(bc); 793 if (pc->refresh_entropy_probs == 0) 794 { 795 vpx_memcpy(&pc->lfc, &pc->fc, sizeof(pc->fc)); 796 } 797 798 pc->refresh_last_frame = pc->frame_type == KEY_FRAME || vp8_read_bit(bc); 799 800 if (0) 801 { 802 FILE *z = fopen("decodestats.stt", "a"); 803 fprintf(z, "%6d F:%d,G:%d,A:%d,L:%d,Q:%d\n", 804 pc->current_video_frame, 805 pc->frame_type, 806 pc->refresh_golden_frame, 807 pc->refresh_alt_ref_frame, 808 pc->refresh_last_frame, 809 pc->base_qindex); 810 fclose(z); 811 } 812 813 814 { 815 /* read coef probability tree */ 816 817 for (i = 0; i < BLOCK_TYPES; i++) 818 for (j = 0; j < COEF_BANDS; j++) 819 for (k = 0; k < PREV_COEF_CONTEXTS; k++) 820 for (l = 0; l < MAX_ENTROPY_TOKENS - 1; l++) 821 { 822 823 vp8_prob *const p = pc->fc.coef_probs [i][j][k] + l; 824 825 if (vp8_read(bc, vp8_coef_update_probs [i][j][k][l])) 826 { 827 *p = (vp8_prob)vp8_read_literal(bc, 8); 828 829 } 830 } 831 } 832 833 vpx_memcpy(&xd->pre, &pc->yv12_fb[pc->lst_fb_idx], sizeof(YV12_BUFFER_CONFIG)); 834 vpx_memcpy(&xd->dst, &pc->yv12_fb[pc->new_fb_idx], sizeof(YV12_BUFFER_CONFIG)); 835 836 /* set up frame new frame for intra coded blocks */ 837 if (!(pbi->b_multithreaded_rd) || pc->multi_token_partition == ONE_PARTITION || !(pc->filter_level)) 838 vp8_setup_intra_recon(&pc->yv12_fb[pc->new_fb_idx]); 839 840 vp8_setup_block_dptrs(xd); 841 842 vp8_build_block_doffsets(xd); 843 844 /* clear out the coeff buffer */ 845 vpx_memset(xd->qcoeff, 0, sizeof(xd->qcoeff)); 846 847 /* Read the mb_no_coeff_skip flag */ 848 pc->mb_no_coeff_skip = (int)vp8_read_bit(bc); 849 850 851 vp8_decode_mode_mvs(pbi); 852 853 vpx_memset(pc->above_context, 0, sizeof(ENTROPY_CONTEXT_PLANES) * pc->mb_cols); 854 855 vpx_memcpy(&xd->block[0].bmi, &xd->mode_info_context->bmi[0], sizeof(B_MODE_INFO)); 856 857 if (pbi->b_multithreaded_rd && pc->multi_token_partition != ONE_PARTITION) 858 { 859 vp8mt_decode_mb_rows(pbi, xd); 860 if(pbi->common.filter_level) 861 { 862 /*vp8_mt_loop_filter_frame(pbi);*/ /*cm, &pbi->mb, cm->filter_level);*/ 863 864 pc->last_frame_type = pc->frame_type; 865 pc->last_filter_type = pc->filter_type; 866 pc->last_sharpness_level = pc->sharpness_level; 867 } 868 vp8_yv12_extend_frame_borders_ptr(&pc->yv12_fb[pc->new_fb_idx]); /*cm->frame_to_show);*/ 869 } 870 else 871 { 872 int ibc = 0; 873 int num_part = 1 << pc->multi_token_partition; 874 875 /* Decode the individual macro block */ 876 for (mb_row = 0; mb_row < pc->mb_rows; mb_row++) 877 { 878 879 if (num_part > 1) 880 { 881 xd->current_bc = & pbi->mbc[ibc]; 882 ibc++; 883 884 if (ibc == num_part) 885 ibc = 0; 886 } 887 888 vp8_decode_mb_row(pbi, pc, mb_row, xd); 889 } 890 } 891 892 893 stop_token_decoder(pbi); 894 895 /* vpx_log("Decoder: Frame Decoded, Size Roughly:%d bytes \n",bc->pos+pbi->bc2.pos); */ 896 897 /* If this was a kf or Gf note the Q used */ 898 if ((pc->frame_type == KEY_FRAME) || 899 pc->refresh_golden_frame || pc->refresh_alt_ref_frame) 900 { 901 pc->last_kf_gf_q = pc->base_qindex; 902 } 903 904 if (pc->refresh_entropy_probs == 0) 905 { 906 vpx_memcpy(&pc->fc, &pc->lfc, sizeof(pc->fc)); 907 } 908 909 #ifdef PACKET_TESTING 910 { 911 FILE *f = fopen("decompressor.VP8", "ab"); 912 unsigned int size = pbi->bc2.pos + pbi->bc.pos + 8; 913 fwrite((void *) &size, 4, 1, f); 914 fwrite((void *) pbi->Source, size, 1, f); 915 fclose(f); 916 } 917 #endif 918 919 return 0; 920 } 921
