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 "vp8/common/header.h" 14 #include "vp8/common/reconintra.h" 15 #include "vp8/common/reconintra4x4.h" 16 #include "vp8/common/recon.h" 17 #include "vp8/common/reconinter.h" 18 #include "dequantize.h" 19 #include "detokenize.h" 20 #include "vp8/common/invtrans.h" 21 #include "vp8/common/alloccommon.h" 22 #include "vp8/common/entropymode.h" 23 #include "vp8/common/quant_common.h" 24 #include "vpx_scale/vpxscale.h" 25 #include "vpx_scale/yv12extend.h" 26 #include "vp8/common/setupintrarecon.h" 27 28 #include "decodemv.h" 29 #include "vp8/common/extend.h" 30 #include "vpx_mem/vpx_mem.h" 31 #include "vp8/common/idct.h" 32 #include "dequantize.h" 33 #include "vp8/common/threading.h" 34 #include "decoderthreading.h" 35 #include "dboolhuff.h" 36 37 #include <assert.h> 38 #include <stdio.h> 39 40 void vp8cx_init_de_quantizer(VP8D_COMP *pbi) 41 { 42 int i; 43 int Q; 44 VP8_COMMON *const pc = & pbi->common; 45 46 for (Q = 0; Q < QINDEX_RANGE; Q++) 47 { 48 pc->Y1dequant[Q][0] = (short)vp8_dc_quant(Q, pc->y1dc_delta_q); 49 pc->Y2dequant[Q][0] = (short)vp8_dc2quant(Q, pc->y2dc_delta_q); 50 pc->UVdequant[Q][0] = (short)vp8_dc_uv_quant(Q, pc->uvdc_delta_q); 51 52 /* all the ac values = ; */ 53 for (i = 1; i < 16; i++) 54 { 55 int rc = vp8_default_zig_zag1d[i]; 56 57 pc->Y1dequant[Q][rc] = (short)vp8_ac_yquant(Q); 58 pc->Y2dequant[Q][rc] = (short)vp8_ac2quant(Q, pc->y2ac_delta_q); 59 pc->UVdequant[Q][rc] = (short)vp8_ac_uv_quant(Q, pc->uvac_delta_q); 60 } 61 } 62 } 63 64 void mb_init_dequantizer(VP8D_COMP *pbi, MACROBLOCKD *xd) 65 { 66 int i; 67 int QIndex; 68 MB_MODE_INFO *mbmi = &xd->mode_info_context->mbmi; 69 VP8_COMMON *const pc = & pbi->common; 70 71 /* Decide whether to use the default or alternate baseline Q value. */ 72 if (xd->segmentation_enabled) 73 { 74 /* Abs Value */ 75 if (xd->mb_segement_abs_delta == SEGMENT_ABSDATA) 76 QIndex = xd->segment_feature_data[MB_LVL_ALT_Q][mbmi->segment_id]; 77 78 /* Delta Value */ 79 else 80 { 81 QIndex = pc->base_qindex + xd->segment_feature_data[MB_LVL_ALT_Q][mbmi->segment_id]; 82 QIndex = (QIndex >= 0) ? ((QIndex <= MAXQ) ? QIndex : MAXQ) : 0; /* Clamp to valid range */ 83 } 84 } 85 else 86 QIndex = pc->base_qindex; 87 88 /* Set up the block level dequant pointers */ 89 for (i = 0; i < 16; i++) 90 { 91 xd->block[i].dequant = pc->Y1dequant[QIndex]; 92 } 93 94 for (i = 16; i < 24; i++) 95 { 96 xd->block[i].dequant = pc->UVdequant[QIndex]; 97 } 98 99 xd->block[24].dequant = pc->Y2dequant[QIndex]; 100 101 } 102 103 #if CONFIG_RUNTIME_CPU_DETECT 104 #define RTCD_VTABLE(x) (&(pbi)->common.rtcd.x) 105 #else 106 #define RTCD_VTABLE(x) NULL 107 #endif 108 109 /* skip_recon_mb() is Modified: Instead of writing the result to predictor buffer and then copying it 110 * to dst buffer, we can write the result directly to dst buffer. This eliminates unnecessary copy. 111 */ 112 static void skip_recon_mb(VP8D_COMP *pbi, MACROBLOCKD *xd) 113 { 114 if (xd->frame_type == KEY_FRAME || xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME) 115 { 116 117 vp8_build_intra_predictors_mbuv_s(xd); 118 RECON_INVOKE(&pbi->common.rtcd.recon, 119 build_intra_predictors_mby_s)(xd); 120 } 121 else 122 { 123 vp8_build_inter_predictors_mb_s(xd); 124 } 125 } 126 127 static void clamp_mv_to_umv_border(MV *mv, const MACROBLOCKD *xd) 128 { 129 /* If the MV points so far into the UMV border that no visible pixels 130 * are used for reconstruction, the subpel part of the MV can be 131 * discarded and the MV limited to 16 pixels with equivalent results. 132 * 133 * This limit kicks in at 19 pixels for the top and left edges, for 134 * the 16 pixels plus 3 taps right of the central pixel when subpel 135 * filtering. The bottom and right edges use 16 pixels plus 2 pixels 136 * left of the central pixel when filtering. 137 */ 138 if (mv->col < (xd->mb_to_left_edge - (19 << 3))) 139 mv->col = xd->mb_to_left_edge - (16 << 3); 140 else if (mv->col > xd->mb_to_right_edge + (18 << 3)) 141 mv->col = xd->mb_to_right_edge + (16 << 3); 142 143 if (mv->row < (xd->mb_to_top_edge - (19 << 3))) 144 mv->row = xd->mb_to_top_edge - (16 << 3); 145 else if (mv->row > xd->mb_to_bottom_edge + (18 << 3)) 146 mv->row = xd->mb_to_bottom_edge + (16 << 3); 147 } 148 149 /* A version of the above function for chroma block MVs.*/ 150 static void clamp_uvmv_to_umv_border(MV *mv, const MACROBLOCKD *xd) 151 { 152 mv->col = (2*mv->col < (xd->mb_to_left_edge - (19 << 3))) ? (xd->mb_to_left_edge - (16 << 3)) >> 1 : mv->col; 153 mv->col = (2*mv->col > xd->mb_to_right_edge + (18 << 3)) ? (xd->mb_to_right_edge + (16 << 3)) >> 1 : mv->col; 154 155 mv->row = (2*mv->row < (xd->mb_to_top_edge - (19 << 3))) ? (xd->mb_to_top_edge - (16 << 3)) >> 1 : mv->row; 156 mv->row = (2*mv->row > xd->mb_to_bottom_edge + (18 << 3)) ? (xd->mb_to_bottom_edge + (16 << 3)) >> 1 : mv->row; 157 } 158 159 void clamp_mvs(MACROBLOCKD *xd) 160 { 161 if (xd->mode_info_context->mbmi.mode == SPLITMV) 162 { 163 int i; 164 165 for (i=0; i<16; i++) 166 clamp_mv_to_umv_border(&xd->block[i].bmi.mv.as_mv, xd); 167 for (i=16; i<24; i++) 168 clamp_uvmv_to_umv_border(&xd->block[i].bmi.mv.as_mv, xd); 169 } 170 else 171 { 172 clamp_mv_to_umv_border(&xd->mode_info_context->mbmi.mv.as_mv, xd); 173 clamp_uvmv_to_umv_border(&xd->block[16].bmi.mv.as_mv, xd); 174 } 175 176 } 177 178 static void decode_macroblock(VP8D_COMP *pbi, MACROBLOCKD *xd) 179 { 180 int eobtotal = 0; 181 int i, do_clamp = xd->mode_info_context->mbmi.need_to_clamp_mvs; 182 183 if (xd->mode_info_context->mbmi.mb_skip_coeff) 184 { 185 vp8_reset_mb_tokens_context(xd); 186 } 187 else 188 { 189 eobtotal = vp8_decode_mb_tokens(pbi, xd); 190 } 191 192 /* Perform temporary clamping of the MV to be used for prediction */ 193 if (do_clamp) 194 { 195 clamp_mvs(xd); 196 } 197 198 xd->mode_info_context->mbmi.dc_diff = 1; 199 200 if (xd->mode_info_context->mbmi.mode != B_PRED && xd->mode_info_context->mbmi.mode != SPLITMV && eobtotal == 0) 201 { 202 xd->mode_info_context->mbmi.dc_diff = 0; 203 skip_recon_mb(pbi, xd); 204 return; 205 } 206 207 if (xd->segmentation_enabled) 208 mb_init_dequantizer(pbi, xd); 209 210 /* do prediction */ 211 if (xd->frame_type == KEY_FRAME || xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME) 212 { 213 vp8_build_intra_predictors_mbuv(xd); 214 215 if (xd->mode_info_context->mbmi.mode != B_PRED) 216 { 217 RECON_INVOKE(&pbi->common.rtcd.recon, 218 build_intra_predictors_mby)(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 static void 324 decode_mb_row(VP8D_COMP *pbi, VP8_COMMON *pc, int mb_row, MACROBLOCKD *xd) 325 { 326 327 int i; 328 int recon_yoffset, recon_uvoffset; 329 int mb_col; 330 int ref_fb_idx = pc->lst_fb_idx; 331 int dst_fb_idx = pc->new_fb_idx; 332 int recon_y_stride = pc->yv12_fb[ref_fb_idx].y_stride; 333 int recon_uv_stride = pc->yv12_fb[ref_fb_idx].uv_stride; 334 335 vpx_memset(&pc->left_context, 0, sizeof(pc->left_context)); 336 recon_yoffset = mb_row * recon_y_stride * 16; 337 recon_uvoffset = mb_row * recon_uv_stride * 8; 338 /* reset above block coeffs */ 339 340 xd->above_context = pc->above_context; 341 xd->up_available = (mb_row != 0); 342 343 xd->mb_to_top_edge = -((mb_row * 16)) << 3; 344 xd->mb_to_bottom_edge = ((pc->mb_rows - 1 - mb_row) * 16) << 3; 345 346 for (mb_col = 0; mb_col < pc->mb_cols; mb_col++) 347 { 348 349 if (xd->mode_info_context->mbmi.mode == SPLITMV || xd->mode_info_context->mbmi.mode == B_PRED) 350 { 351 for (i = 0; i < 16; i++) 352 { 353 BLOCKD *d = &xd->block[i]; 354 vpx_memcpy(&d->bmi, &xd->mode_info_context->bmi[i], sizeof(B_MODE_INFO)); 355 } 356 } 357 358 /* Distance of Mb to the various image edges. 359 * These are specified to 8th pel as they are always compared to values that are in 1/8th pel units 360 */ 361 xd->mb_to_left_edge = -((mb_col * 16) << 3); 362 xd->mb_to_right_edge = ((pc->mb_cols - 1 - mb_col) * 16) << 3; 363 364 xd->dst.y_buffer = pc->yv12_fb[dst_fb_idx].y_buffer + recon_yoffset; 365 xd->dst.u_buffer = pc->yv12_fb[dst_fb_idx].u_buffer + recon_uvoffset; 366 xd->dst.v_buffer = pc->yv12_fb[dst_fb_idx].v_buffer + recon_uvoffset; 367 368 xd->left_available = (mb_col != 0); 369 370 /* Select the appropriate reference frame for this MB */ 371 if (xd->mode_info_context->mbmi.ref_frame == LAST_FRAME) 372 ref_fb_idx = pc->lst_fb_idx; 373 else if (xd->mode_info_context->mbmi.ref_frame == GOLDEN_FRAME) 374 ref_fb_idx = pc->gld_fb_idx; 375 else 376 ref_fb_idx = pc->alt_fb_idx; 377 378 xd->pre.y_buffer = pc->yv12_fb[ref_fb_idx].y_buffer + recon_yoffset; 379 xd->pre.u_buffer = pc->yv12_fb[ref_fb_idx].u_buffer + recon_uvoffset; 380 xd->pre.v_buffer = pc->yv12_fb[ref_fb_idx].v_buffer + recon_uvoffset; 381 382 if (xd->mode_info_context->mbmi.ref_frame != INTRA_FRAME) 383 { 384 /* propagate errors from reference frames */ 385 xd->corrupted |= pc->yv12_fb[ref_fb_idx].corrupted; 386 } 387 388 vp8_build_uvmvs(xd, pc->full_pixel); 389 390 /* 391 if(pc->current_video_frame==0 &&mb_col==1 && mb_row==0) 392 pbi->debugoutput =1; 393 else 394 pbi->debugoutput =0; 395 */ 396 decode_macroblock(pbi, xd); 397 398 /* check if the boolean decoder has suffered an error */ 399 xd->corrupted |= vp8dx_bool_error(xd->current_bc); 400 401 recon_yoffset += 16; 402 recon_uvoffset += 8; 403 404 ++xd->mode_info_context; /* next mb */ 405 406 xd->above_context++; 407 408 } 409 410 /* adjust to the next row of mbs */ 411 vp8_extend_mb_row( 412 &pc->yv12_fb[dst_fb_idx], 413 xd->dst.y_buffer + 16, xd->dst.u_buffer + 8, xd->dst.v_buffer + 8 414 ); 415 416 ++xd->mode_info_context; /* skip prediction column */ 417 } 418 419 420 static unsigned int read_partition_size(const unsigned char *cx_size) 421 { 422 const unsigned int size = 423 cx_size[0] + (cx_size[1] << 8) + (cx_size[2] << 16); 424 return size; 425 } 426 427 428 static void setup_token_decoder(VP8D_COMP *pbi, 429 const unsigned char *cx_data) 430 { 431 int num_part; 432 int i; 433 VP8_COMMON *pc = &pbi->common; 434 const unsigned char *user_data_end = pbi->Source + pbi->source_sz; 435 vp8_reader *bool_decoder; 436 const unsigned char *partition; 437 438 /* Parse number of token partitions to use */ 439 pc->multi_token_partition = (TOKEN_PARTITION)vp8_read_literal(&pbi->bc, 2); 440 num_part = 1 << pc->multi_token_partition; 441 442 /* Set up pointers to the first partition */ 443 partition = cx_data; 444 bool_decoder = &pbi->bc2; 445 446 if (num_part > 1) 447 { 448 CHECK_MEM_ERROR(pbi->mbc, vpx_malloc(num_part * sizeof(vp8_reader))); 449 bool_decoder = pbi->mbc; 450 partition += 3 * (num_part - 1); 451 } 452 453 for (i = 0; i < num_part; i++) 454 { 455 const unsigned char *partition_size_ptr = cx_data + i * 3; 456 ptrdiff_t partition_size; 457 458 /* Calculate the length of this partition. The last partition 459 * size is implicit. 460 */ 461 if (i < num_part - 1) 462 { 463 partition_size = read_partition_size(partition_size_ptr); 464 } 465 else 466 { 467 partition_size = user_data_end - partition; 468 } 469 470 if (partition + partition_size > user_data_end 471 || partition + partition_size < partition) 472 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME, 473 "Truncated packet or corrupt partition " 474 "%d length", i + 1); 475 476 if (vp8dx_start_decode(bool_decoder, partition, partition_size)) 477 vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR, 478 "Failed to allocate bool decoder %d", i + 1); 479 480 /* Advance to the next partition */ 481 partition += partition_size; 482 bool_decoder++; 483 } 484 485 #if CONFIG_MULTITHREAD 486 /* Clamp number of decoder threads */ 487 if (pbi->decoding_thread_count > num_part - 1) 488 pbi->decoding_thread_count = num_part - 1; 489 #endif 490 } 491 492 493 static void stop_token_decoder(VP8D_COMP *pbi) 494 { 495 VP8_COMMON *pc = &pbi->common; 496 497 if (pc->multi_token_partition != ONE_PARTITION) 498 vpx_free(pbi->mbc); 499 } 500 501 static void init_frame(VP8D_COMP *pbi) 502 { 503 VP8_COMMON *const pc = & pbi->common; 504 MACROBLOCKD *const xd = & pbi->mb; 505 506 if (pc->frame_type == KEY_FRAME) 507 { 508 /* Various keyframe initializations */ 509 vpx_memcpy(pc->fc.mvc, vp8_default_mv_context, sizeof(vp8_default_mv_context)); 510 511 vp8_init_mbmode_probs(pc); 512 513 vp8_default_coef_probs(pc); 514 vp8_kf_default_bmode_probs(pc->kf_bmode_prob); 515 516 /* reset the segment feature data to 0 with delta coding (Default state). */ 517 vpx_memset(xd->segment_feature_data, 0, sizeof(xd->segment_feature_data)); 518 xd->mb_segement_abs_delta = SEGMENT_DELTADATA; 519 520 /* reset the mode ref deltasa for loop filter */ 521 vpx_memset(xd->ref_lf_deltas, 0, sizeof(xd->ref_lf_deltas)); 522 vpx_memset(xd->mode_lf_deltas, 0, sizeof(xd->mode_lf_deltas)); 523 524 /* All buffers are implicitly updated on key frames. */ 525 pc->refresh_golden_frame = 1; 526 pc->refresh_alt_ref_frame = 1; 527 pc->copy_buffer_to_gf = 0; 528 pc->copy_buffer_to_arf = 0; 529 530 /* Note that Golden and Altref modes cannot be used on a key frame so 531 * ref_frame_sign_bias[] is undefined and meaningless 532 */ 533 pc->ref_frame_sign_bias[GOLDEN_FRAME] = 0; 534 pc->ref_frame_sign_bias[ALTREF_FRAME] = 0; 535 } 536 else 537 { 538 if (!pc->use_bilinear_mc_filter) 539 pc->mcomp_filter_type = SIXTAP; 540 else 541 pc->mcomp_filter_type = BILINEAR; 542 543 /* To enable choice of different interploation filters */ 544 if (pc->mcomp_filter_type == SIXTAP) 545 { 546 xd->subpixel_predict = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap4x4); 547 xd->subpixel_predict8x4 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap8x4); 548 xd->subpixel_predict8x8 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap8x8); 549 xd->subpixel_predict16x16 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap16x16); 550 } 551 else 552 { 553 xd->subpixel_predict = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear4x4); 554 xd->subpixel_predict8x4 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear8x4); 555 xd->subpixel_predict8x8 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear8x8); 556 xd->subpixel_predict16x16 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear16x16); 557 } 558 } 559 560 xd->left_context = &pc->left_context; 561 xd->mode_info_context = pc->mi; 562 xd->frame_type = pc->frame_type; 563 xd->mode_info_context->mbmi.mode = DC_PRED; 564 xd->mode_info_stride = pc->mode_info_stride; 565 xd->corrupted = 0; /* init without corruption */ 566 } 567 568 int vp8_decode_frame(VP8D_COMP *pbi) 569 { 570 vp8_reader *const bc = & pbi->bc; 571 VP8_COMMON *const pc = & pbi->common; 572 MACROBLOCKD *const xd = & pbi->mb; 573 const unsigned char *data = (const unsigned char *)pbi->Source; 574 const unsigned char *const data_end = data + pbi->source_sz; 575 ptrdiff_t first_partition_length_in_bytes; 576 577 int mb_row; 578 int i, j, k, l; 579 const int *const mb_feature_data_bits = vp8_mb_feature_data_bits; 580 581 /* start with no corruption of current frame */ 582 xd->corrupted = 0; 583 pc->yv12_fb[pc->new_fb_idx].corrupted = 0; 584 585 if (data_end - data < 3) 586 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME, 587 "Truncated packet"); 588 pc->frame_type = (FRAME_TYPE)(data[0] & 1); 589 pc->version = (data[0] >> 1) & 7; 590 pc->show_frame = (data[0] >> 4) & 1; 591 first_partition_length_in_bytes = 592 (data[0] | (data[1] << 8) | (data[2] << 16)) >> 5; 593 data += 3; 594 595 if (data + first_partition_length_in_bytes > data_end 596 || data + first_partition_length_in_bytes < data) 597 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME, 598 "Truncated packet or corrupt partition 0 length"); 599 vp8_setup_version(pc); 600 601 if (pc->frame_type == KEY_FRAME) 602 { 603 const int Width = pc->Width; 604 const int Height = pc->Height; 605 606 /* vet via sync code */ 607 if (data[0] != 0x9d || data[1] != 0x01 || data[2] != 0x2a) 608 vpx_internal_error(&pc->error, VPX_CODEC_UNSUP_BITSTREAM, 609 "Invalid frame sync code"); 610 611 pc->Width = (data[3] | (data[4] << 8)) & 0x3fff; 612 pc->horiz_scale = data[4] >> 6; 613 pc->Height = (data[5] | (data[6] << 8)) & 0x3fff; 614 pc->vert_scale = data[6] >> 6; 615 data += 7; 616 617 if (Width != pc->Width || Height != pc->Height) 618 { 619 int prev_mb_rows = pc->mb_rows; 620 621 if (pc->Width <= 0) 622 { 623 pc->Width = Width; 624 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME, 625 "Invalid frame width"); 626 } 627 628 if (pc->Height <= 0) 629 { 630 pc->Height = Height; 631 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME, 632 "Invalid frame height"); 633 } 634 635 if (vp8_alloc_frame_buffers(pc, pc->Width, pc->Height)) 636 vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR, 637 "Failed to allocate frame buffers"); 638 639 #if CONFIG_MULTITHREAD 640 if (pbi->b_multithreaded_rd) 641 vp8mt_alloc_temp_buffers(pbi, pc->Width, prev_mb_rows); 642 #endif 643 } 644 } 645 646 if (pc->Width == 0 || pc->Height == 0) 647 { 648 return -1; 649 } 650 651 init_frame(pbi); 652 653 if (vp8dx_start_decode(bc, data, data_end - data)) 654 vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR, 655 "Failed to allocate bool decoder 0"); 656 if (pc->frame_type == KEY_FRAME) { 657 pc->clr_type = (YUV_TYPE)vp8_read_bit(bc); 658 pc->clamp_type = (CLAMP_TYPE)vp8_read_bit(bc); 659 } 660 661 /* Is segmentation enabled */ 662 xd->segmentation_enabled = (unsigned char)vp8_read_bit(bc); 663 664 if (xd->segmentation_enabled) 665 { 666 /* Signal whether or not the segmentation map is being explicitly updated this frame. */ 667 xd->update_mb_segmentation_map = (unsigned char)vp8_read_bit(bc); 668 xd->update_mb_segmentation_data = (unsigned char)vp8_read_bit(bc); 669 670 if (xd->update_mb_segmentation_data) 671 { 672 xd->mb_segement_abs_delta = (unsigned char)vp8_read_bit(bc); 673 674 vpx_memset(xd->segment_feature_data, 0, sizeof(xd->segment_feature_data)); 675 676 /* For each segmentation feature (Quant and loop filter level) */ 677 for (i = 0; i < MB_LVL_MAX; i++) 678 { 679 for (j = 0; j < MAX_MB_SEGMENTS; j++) 680 { 681 /* Frame level data */ 682 if (vp8_read_bit(bc)) 683 { 684 xd->segment_feature_data[i][j] = (signed char)vp8_read_literal(bc, mb_feature_data_bits[i]); 685 686 if (vp8_read_bit(bc)) 687 xd->segment_feature_data[i][j] = -xd->segment_feature_data[i][j]; 688 } 689 else 690 xd->segment_feature_data[i][j] = 0; 691 } 692 } 693 } 694 695 if (xd->update_mb_segmentation_map) 696 { 697 /* Which macro block level features are enabled */ 698 vpx_memset(xd->mb_segment_tree_probs, 255, sizeof(xd->mb_segment_tree_probs)); 699 700 /* Read the probs used to decode the segment id for each macro block. */ 701 for (i = 0; i < MB_FEATURE_TREE_PROBS; i++) 702 { 703 /* If not explicitly set value is defaulted to 255 by memset above */ 704 if (vp8_read_bit(bc)) 705 xd->mb_segment_tree_probs[i] = (vp8_prob)vp8_read_literal(bc, 8); 706 } 707 } 708 } 709 710 /* Read the loop filter level and type */ 711 pc->filter_type = (LOOPFILTERTYPE) vp8_read_bit(bc); 712 pc->filter_level = vp8_read_literal(bc, 6); 713 pc->sharpness_level = vp8_read_literal(bc, 3); 714 715 /* Read in loop filter deltas applied at the MB level based on mode or ref frame. */ 716 xd->mode_ref_lf_delta_update = 0; 717 xd->mode_ref_lf_delta_enabled = (unsigned char)vp8_read_bit(bc); 718 719 if (xd->mode_ref_lf_delta_enabled) 720 { 721 /* Do the deltas need to be updated */ 722 xd->mode_ref_lf_delta_update = (unsigned char)vp8_read_bit(bc); 723 724 if (xd->mode_ref_lf_delta_update) 725 { 726 /* Send update */ 727 for (i = 0; i < MAX_REF_LF_DELTAS; i++) 728 { 729 if (vp8_read_bit(bc)) 730 { 731 /*sign = vp8_read_bit( bc );*/ 732 xd->ref_lf_deltas[i] = (signed char)vp8_read_literal(bc, 6); 733 734 if (vp8_read_bit(bc)) /* Apply sign */ 735 xd->ref_lf_deltas[i] = xd->ref_lf_deltas[i] * -1; 736 } 737 } 738 739 /* Send update */ 740 for (i = 0; i < MAX_MODE_LF_DELTAS; i++) 741 { 742 if (vp8_read_bit(bc)) 743 { 744 /*sign = vp8_read_bit( bc );*/ 745 xd->mode_lf_deltas[i] = (signed char)vp8_read_literal(bc, 6); 746 747 if (vp8_read_bit(bc)) /* Apply sign */ 748 xd->mode_lf_deltas[i] = xd->mode_lf_deltas[i] * -1; 749 } 750 } 751 } 752 } 753 754 setup_token_decoder(pbi, data + first_partition_length_in_bytes); 755 xd->current_bc = &pbi->bc2; 756 757 /* Read the default quantizers. */ 758 { 759 int Q, q_update; 760 761 Q = vp8_read_literal(bc, 7); /* AC 1st order Q = default */ 762 pc->base_qindex = Q; 763 q_update = 0; 764 pc->y1dc_delta_q = get_delta_q(bc, pc->y1dc_delta_q, &q_update); 765 pc->y2dc_delta_q = get_delta_q(bc, pc->y2dc_delta_q, &q_update); 766 pc->y2ac_delta_q = get_delta_q(bc, pc->y2ac_delta_q, &q_update); 767 pc->uvdc_delta_q = get_delta_q(bc, pc->uvdc_delta_q, &q_update); 768 pc->uvac_delta_q = get_delta_q(bc, pc->uvac_delta_q, &q_update); 769 770 if (q_update) 771 vp8cx_init_de_quantizer(pbi); 772 773 /* MB level dequantizer setup */ 774 mb_init_dequantizer(pbi, &pbi->mb); 775 } 776 777 /* Determine if the golden frame or ARF buffer should be updated and how. 778 * For all non key frames the GF and ARF refresh flags and sign bias 779 * flags must be set explicitly. 780 */ 781 if (pc->frame_type != KEY_FRAME) 782 { 783 /* Should the GF or ARF be updated from the current frame */ 784 pc->refresh_golden_frame = vp8_read_bit(bc); 785 pc->refresh_alt_ref_frame = vp8_read_bit(bc); 786 787 /* Buffer to buffer copy flags. */ 788 pc->copy_buffer_to_gf = 0; 789 790 if (!pc->refresh_golden_frame) 791 pc->copy_buffer_to_gf = vp8_read_literal(bc, 2); 792 793 pc->copy_buffer_to_arf = 0; 794 795 if (!pc->refresh_alt_ref_frame) 796 pc->copy_buffer_to_arf = vp8_read_literal(bc, 2); 797 798 pc->ref_frame_sign_bias[GOLDEN_FRAME] = vp8_read_bit(bc); 799 pc->ref_frame_sign_bias[ALTREF_FRAME] = vp8_read_bit(bc); 800 } 801 802 pc->refresh_entropy_probs = vp8_read_bit(bc); 803 if (pc->refresh_entropy_probs == 0) 804 { 805 vpx_memcpy(&pc->lfc, &pc->fc, sizeof(pc->fc)); 806 } 807 808 pc->refresh_last_frame = pc->frame_type == KEY_FRAME || vp8_read_bit(bc); 809 810 if (0) 811 { 812 FILE *z = fopen("decodestats.stt", "a"); 813 fprintf(z, "%6d F:%d,G:%d,A:%d,L:%d,Q:%d\n", 814 pc->current_video_frame, 815 pc->frame_type, 816 pc->refresh_golden_frame, 817 pc->refresh_alt_ref_frame, 818 pc->refresh_last_frame, 819 pc->base_qindex); 820 fclose(z); 821 } 822 823 824 { 825 /* read coef probability tree */ 826 827 for (i = 0; i < BLOCK_TYPES; i++) 828 for (j = 0; j < COEF_BANDS; j++) 829 for (k = 0; k < PREV_COEF_CONTEXTS; k++) 830 for (l = 0; l < MAX_ENTROPY_TOKENS - 1; l++) 831 { 832 833 vp8_prob *const p = pc->fc.coef_probs [i][j][k] + l; 834 835 if (vp8_read(bc, vp8_coef_update_probs [i][j][k][l])) 836 { 837 *p = (vp8_prob)vp8_read_literal(bc, 8); 838 839 } 840 } 841 } 842 843 vpx_memcpy(&xd->pre, &pc->yv12_fb[pc->lst_fb_idx], sizeof(YV12_BUFFER_CONFIG)); 844 vpx_memcpy(&xd->dst, &pc->yv12_fb[pc->new_fb_idx], sizeof(YV12_BUFFER_CONFIG)); 845 846 /* set up frame new frame for intra coded blocks */ 847 #if CONFIG_MULTITHREAD 848 if (!(pbi->b_multithreaded_rd) || pc->multi_token_partition == ONE_PARTITION || !(pc->filter_level)) 849 #endif 850 vp8_setup_intra_recon(&pc->yv12_fb[pc->new_fb_idx]); 851 852 vp8_setup_block_dptrs(xd); 853 854 vp8_build_block_doffsets(xd); 855 856 /* clear out the coeff buffer */ 857 vpx_memset(xd->qcoeff, 0, sizeof(xd->qcoeff)); 858 859 /* Read the mb_no_coeff_skip flag */ 860 pc->mb_no_coeff_skip = (int)vp8_read_bit(bc); 861 862 863 vp8_decode_mode_mvs(pbi); 864 865 vpx_memset(pc->above_context, 0, sizeof(ENTROPY_CONTEXT_PLANES) * pc->mb_cols); 866 867 vpx_memcpy(&xd->block[0].bmi, &xd->mode_info_context->bmi[0], sizeof(B_MODE_INFO)); 868 869 #if CONFIG_MULTITHREAD 870 if (pbi->b_multithreaded_rd && pc->multi_token_partition != ONE_PARTITION) 871 { 872 vp8mt_decode_mb_rows(pbi, xd); 873 if(pbi->common.filter_level) 874 { 875 /*vp8_mt_loop_filter_frame(pbi);*/ /*cm, &pbi->mb, cm->filter_level);*/ 876 877 pc->last_frame_type = pc->frame_type; 878 pc->last_filter_type = pc->filter_type; 879 pc->last_sharpness_level = pc->sharpness_level; 880 } 881 vp8_yv12_extend_frame_borders_ptr(&pc->yv12_fb[pc->new_fb_idx]); /*cm->frame_to_show);*/ 882 } 883 else 884 #endif 885 { 886 int ibc = 0; 887 int num_part = 1 << pc->multi_token_partition; 888 889 /* Decode the individual macro block */ 890 for (mb_row = 0; mb_row < pc->mb_rows; mb_row++) 891 { 892 893 if (num_part > 1) 894 { 895 xd->current_bc = & pbi->mbc[ibc]; 896 ibc++; 897 898 if (ibc == num_part) 899 ibc = 0; 900 } 901 902 decode_mb_row(pbi, pc, mb_row, xd); 903 } 904 } 905 906 907 stop_token_decoder(pbi); 908 909 /* Collect information about decoder corruption. */ 910 /* 1. Check first boolean decoder for errors. */ 911 pc->yv12_fb[pc->new_fb_idx].corrupted = 912 vp8dx_bool_error(bc); 913 /* 2. Check the macroblock information */ 914 pc->yv12_fb[pc->new_fb_idx].corrupted |= 915 xd->corrupted; 916 917 /* vpx_log("Decoder: Frame Decoded, Size Roughly:%d bytes \n",bc->pos+pbi->bc2.pos); */ 918 919 /* If this was a kf or Gf note the Q used */ 920 if ((pc->frame_type == KEY_FRAME) || 921 pc->refresh_golden_frame || pc->refresh_alt_ref_frame) 922 { 923 pc->last_kf_gf_q = pc->base_qindex; 924 } 925 926 if (pc->refresh_entropy_probs == 0) 927 { 928 vpx_memcpy(&pc->fc, &pc->lfc, sizeof(pc->fc)); 929 } 930 931 #ifdef PACKET_TESTING 932 { 933 FILE *f = fopen("decompressor.VP8", "ab"); 934 unsigned int size = pbi->bc2.pos + pbi->bc.pos + 8; 935 fwrite((void *) &size, 4, 1, f); 936 fwrite((void *) pbi->Source, size, 1, f); 937 fclose(f); 938 } 939 #endif 940 941 return 0; 942 } 943
