2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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.
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"
29 #include "vp8/common/extend.h"
30 #if CONFIG_ERROR_CONCEALMENT
31 #include "error_concealment.h"
33 #include "vpx_mem/vpx_mem.h"
34 #include "vp8/common/idct.h"
35 #include "dequantize.h"
36 #include "vp8/common/threading.h"
37 #include "decoderthreading.h"
38 #include "dboolhuff.h"
43 void vp8cx_init_de_quantizer(VP8D_COMP *pbi)
47 VP8_COMMON *const pc = & pbi->common;
49 for (Q = 0; Q < QINDEX_RANGE; Q++)
51 pc->Y1dequant[Q][0] = (short)vp8_dc_quant(Q, pc->y1dc_delta_q);
52 pc->Y2dequant[Q][0] = (short)vp8_dc2quant(Q, pc->y2dc_delta_q);
53 pc->UVdequant[Q][0] = (short)vp8_dc_uv_quant(Q, pc->uvdc_delta_q);
55 /* all the ac values = ; */
56 for (i = 1; i < 16; i++)
58 int rc = vp8_default_zig_zag1d[i];
60 pc->Y1dequant[Q][rc] = (short)vp8_ac_yquant(Q);
61 pc->Y2dequant[Q][rc] = (short)vp8_ac2quant(Q, pc->y2ac_delta_q);
62 pc->UVdequant[Q][rc] = (short)vp8_ac_uv_quant(Q, pc->uvac_delta_q);
67 void mb_init_dequantizer(VP8D_COMP *pbi, MACROBLOCKD *xd)
71 MB_MODE_INFO *mbmi = &xd->mode_info_context->mbmi;
72 VP8_COMMON *const pc = & pbi->common;
74 /* Decide whether to use the default or alternate baseline Q value. */
75 if (xd->segmentation_enabled)
78 if (xd->mb_segement_abs_delta == SEGMENT_ABSDATA)
79 QIndex = xd->segment_feature_data[MB_LVL_ALT_Q][mbmi->segment_id];
84 QIndex = pc->base_qindex + xd->segment_feature_data[MB_LVL_ALT_Q][mbmi->segment_id];
85 QIndex = (QIndex >= 0) ? ((QIndex <= MAXQ) ? QIndex : MAXQ) : 0; /* Clamp to valid range */
89 QIndex = pc->base_qindex;
91 /* Set up the block level dequant pointers */
92 for (i = 0; i < 16; i++)
94 xd->block[i].dequant = pc->Y1dequant[QIndex];
97 for (i = 16; i < 24; i++)
99 xd->block[i].dequant = pc->UVdequant[QIndex];
102 xd->block[24].dequant = pc->Y2dequant[QIndex];
106 #if CONFIG_RUNTIME_CPU_DETECT
107 #define RTCD_VTABLE(x) (&(pbi)->common.rtcd.x)
109 #define RTCD_VTABLE(x) NULL
112 /* skip_recon_mb() is Modified: Instead of writing the result to predictor buffer and then copying it
113 * to dst buffer, we can write the result directly to dst buffer. This eliminates unnecessary copy.
115 static void skip_recon_mb(VP8D_COMP *pbi, MACROBLOCKD *xd)
117 if (xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME)
119 RECON_INVOKE(&pbi->common.rtcd.recon, build_intra_predictors_mbuv_s)(xd);
120 RECON_INVOKE(&pbi->common.rtcd.recon,
121 build_intra_predictors_mby_s)(xd);
125 vp8_build_inter16x16_predictors_mb(xd, xd->dst.y_buffer,
126 xd->dst.u_buffer, xd->dst.v_buffer,
127 xd->dst.y_stride, xd->dst.uv_stride);
131 static void clamp_mv_to_umv_border(MV *mv, const MACROBLOCKD *xd)
133 /* If the MV points so far into the UMV border that no visible pixels
134 * are used for reconstruction, the subpel part of the MV can be
135 * discarded and the MV limited to 16 pixels with equivalent results.
137 * This limit kicks in at 19 pixels for the top and left edges, for
138 * the 16 pixels plus 3 taps right of the central pixel when subpel
139 * filtering. The bottom and right edges use 16 pixels plus 2 pixels
140 * left of the central pixel when filtering.
142 if (mv->col < (xd->mb_to_left_edge - (19 << 3)))
143 mv->col = xd->mb_to_left_edge - (16 << 3);
144 else if (mv->col > xd->mb_to_right_edge + (18 << 3))
145 mv->col = xd->mb_to_right_edge + (16 << 3);
147 if (mv->row < (xd->mb_to_top_edge - (19 << 3)))
148 mv->row = xd->mb_to_top_edge - (16 << 3);
149 else if (mv->row > xd->mb_to_bottom_edge + (18 << 3))
150 mv->row = xd->mb_to_bottom_edge + (16 << 3);
153 /* A version of the above function for chroma block MVs.*/
154 static void clamp_uvmv_to_umv_border(MV *mv, const MACROBLOCKD *xd)
156 mv->col = (2*mv->col < (xd->mb_to_left_edge - (19 << 3))) ? (xd->mb_to_left_edge - (16 << 3)) >> 1 : mv->col;
157 mv->col = (2*mv->col > xd->mb_to_right_edge + (18 << 3)) ? (xd->mb_to_right_edge + (16 << 3)) >> 1 : mv->col;
159 mv->row = (2*mv->row < (xd->mb_to_top_edge - (19 << 3))) ? (xd->mb_to_top_edge - (16 << 3)) >> 1 : mv->row;
160 mv->row = (2*mv->row > xd->mb_to_bottom_edge + (18 << 3)) ? (xd->mb_to_bottom_edge + (16 << 3)) >> 1 : mv->row;
163 void clamp_mvs(MACROBLOCKD *xd)
165 if (xd->mode_info_context->mbmi.mode == SPLITMV)
170 clamp_mv_to_umv_border(&xd->block[i].bmi.mv.as_mv, xd);
171 for (i=16; i<24; i++)
172 clamp_uvmv_to_umv_border(&xd->block[i].bmi.mv.as_mv, xd);
176 clamp_mv_to_umv_border(&xd->mode_info_context->mbmi.mv.as_mv, xd);
177 clamp_uvmv_to_umv_border(&xd->block[16].bmi.mv.as_mv, xd);
182 static void decode_macroblock(VP8D_COMP *pbi, MACROBLOCKD *xd,
186 MB_PREDICTION_MODE mode;
189 if (xd->mode_info_context->mbmi.mb_skip_coeff)
191 vp8_reset_mb_tokens_context(xd);
195 eobtotal = vp8_decode_mb_tokens(pbi, xd);
198 /* Perform temporary clamping of the MV to be used for prediction */
199 if (xd->mode_info_context->mbmi.need_to_clamp_mvs)
204 mode = xd->mode_info_context->mbmi.mode;
206 if (eobtotal == 0 && mode != B_PRED && mode != SPLITMV)
208 /* Special case: Force the loopfilter to skip when eobtotal and
209 * mb_skip_coeff are zero.
211 xd->mode_info_context->mbmi.mb_skip_coeff = 1;
213 skip_recon_mb(pbi, xd);
217 if (xd->segmentation_enabled)
218 mb_init_dequantizer(pbi, xd);
221 if (xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME)
223 RECON_INVOKE(&pbi->common.rtcd.recon, build_intra_predictors_mbuv)(xd);
227 RECON_INVOKE(&pbi->common.rtcd.recon,
228 build_intra_predictors_mby)(xd);
230 vp8_intra_prediction_down_copy(xd);
235 vp8_build_inter_predictors_mb(xd);
238 #if CONFIG_ERROR_CONCEALMENT
239 if (pbi->ec_enabled &&
240 (mb_idx >= pbi->mvs_corrupt_from_mb ||
241 vp8dx_bool_error(xd->current_bc)))
243 /* MB with corrupt residuals or corrupt mode/motion vectors.
244 * Better to use the predictor as reconstruction.
246 vpx_memset(xd->qcoeff, 0, sizeof(xd->qcoeff));
247 vp8_conceal_corrupt_mb(xd);
252 /* dequantization and idct */
255 for (i = 0; i < 16; i++)
257 BLOCKD *b = &xd->block[i];
258 RECON_INVOKE(RTCD_VTABLE(recon), intra4x4_predict)
259 (b, b->bmi.as_mode, b->predictor);
263 DEQUANT_INVOKE(&pbi->dequant, idct_add)
264 (b->qcoeff, b->dequant, b->predictor,
265 *(b->base_dst) + b->dst, 16, b->dst_stride);
269 IDCT_INVOKE(RTCD_VTABLE(idct), idct1_scalar_add)
270 (b->qcoeff[0] * b->dequant[0], b->predictor,
271 *(b->base_dst) + b->dst, 16, b->dst_stride);
272 ((int *)b->qcoeff)[0] = 0;
277 else if (mode == SPLITMV)
279 DEQUANT_INVOKE (&pbi->dequant, idct_add_y_block)
280 (xd->qcoeff, xd->block[0].dequant,
281 xd->predictor, xd->dst.y_buffer,
282 xd->dst.y_stride, xd->eobs);
286 BLOCKD *b = &xd->block[24];
288 DEQUANT_INVOKE(&pbi->dequant, block)(b);
290 /* do 2nd order transform on the dc block */
291 if (xd->eobs[24] > 1)
293 IDCT_INVOKE(RTCD_VTABLE(idct), iwalsh16)(&b->dqcoeff[0], b->diff);
294 ((int *)b->qcoeff)[0] = 0;
295 ((int *)b->qcoeff)[1] = 0;
296 ((int *)b->qcoeff)[2] = 0;
297 ((int *)b->qcoeff)[3] = 0;
298 ((int *)b->qcoeff)[4] = 0;
299 ((int *)b->qcoeff)[5] = 0;
300 ((int *)b->qcoeff)[6] = 0;
301 ((int *)b->qcoeff)[7] = 0;
305 IDCT_INVOKE(RTCD_VTABLE(idct), iwalsh1)(&b->dqcoeff[0], b->diff);
306 ((int *)b->qcoeff)[0] = 0;
309 DEQUANT_INVOKE (&pbi->dequant, dc_idct_add_y_block)
310 (xd->qcoeff, xd->block[0].dequant,
311 xd->predictor, xd->dst.y_buffer,
312 xd->dst.y_stride, xd->eobs, xd->block[24].diff);
315 DEQUANT_INVOKE (&pbi->dequant, idct_add_uv_block)
316 (xd->qcoeff+16*16, xd->block[16].dequant,
317 xd->predictor+16*16, xd->dst.u_buffer, xd->dst.v_buffer,
318 xd->dst.uv_stride, xd->eobs+16);
322 static int get_delta_q(vp8_reader *bc, int prev, int *q_update)
326 if (vp8_read_bit(bc))
328 ret_val = vp8_read_literal(bc, 4);
330 if (vp8_read_bit(bc))
334 /* Trigger a quantizer update if the delta-q value has changed */
341 #ifdef PACKET_TESTING
349 decode_mb_row(VP8D_COMP *pbi, VP8_COMMON *pc, int mb_row, MACROBLOCKD *xd)
351 int recon_yoffset, recon_uvoffset;
353 int ref_fb_idx = pc->lst_fb_idx;
354 int dst_fb_idx = pc->new_fb_idx;
355 int recon_y_stride = pc->yv12_fb[ref_fb_idx].y_stride;
356 int recon_uv_stride = pc->yv12_fb[ref_fb_idx].uv_stride;
358 vpx_memset(&pc->left_context, 0, sizeof(pc->left_context));
359 recon_yoffset = mb_row * recon_y_stride * 16;
360 recon_uvoffset = mb_row * recon_uv_stride * 8;
361 /* reset above block coeffs */
363 xd->above_context = pc->above_context;
364 xd->up_available = (mb_row != 0);
366 xd->mb_to_top_edge = -((mb_row * 16)) << 3;
367 xd->mb_to_bottom_edge = ((pc->mb_rows - 1 - mb_row) * 16) << 3;
369 for (mb_col = 0; mb_col < pc->mb_cols; mb_col++)
371 /* Distance of Mb to the various image edges.
372 * These are specified to 8th pel as they are always compared to values
373 * that are in 1/8th pel units
375 xd->mb_to_left_edge = -((mb_col * 16) << 3);
376 xd->mb_to_right_edge = ((pc->mb_cols - 1 - mb_col) * 16) << 3;
378 #if CONFIG_ERROR_CONCEALMENT
379 if (pbi->ec_enabled &&
380 xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME &&
381 vp8dx_bool_error(xd->current_bc))
383 /* We have an intra block with corrupt coefficients, better to
384 * conceal with an inter block. Interpolate MVs from neighboring MBs
386 * Note that for the first mb with corrupt residual in a frame,
387 * we might not discover that before decoding the residual. That
388 * happens after this check, and therefore no inter concealment will
391 vp8_interpolate_motion(xd,
393 pc->mb_rows, pc->mb_cols,
394 pc->mode_info_stride);
398 update_blockd_bmi(xd);
400 xd->dst.y_buffer = pc->yv12_fb[dst_fb_idx].y_buffer + recon_yoffset;
401 xd->dst.u_buffer = pc->yv12_fb[dst_fb_idx].u_buffer + recon_uvoffset;
402 xd->dst.v_buffer = pc->yv12_fb[dst_fb_idx].v_buffer + recon_uvoffset;
404 xd->left_available = (mb_col != 0);
406 /* Select the appropriate reference frame for this MB */
407 if (xd->mode_info_context->mbmi.ref_frame == LAST_FRAME)
408 ref_fb_idx = pc->lst_fb_idx;
409 else if (xd->mode_info_context->mbmi.ref_frame == GOLDEN_FRAME)
410 ref_fb_idx = pc->gld_fb_idx;
412 ref_fb_idx = pc->alt_fb_idx;
414 xd->pre.y_buffer = pc->yv12_fb[ref_fb_idx].y_buffer + recon_yoffset;
415 xd->pre.u_buffer = pc->yv12_fb[ref_fb_idx].u_buffer + recon_uvoffset;
416 xd->pre.v_buffer = pc->yv12_fb[ref_fb_idx].v_buffer + recon_uvoffset;
418 if (xd->mode_info_context->mbmi.ref_frame != INTRA_FRAME)
420 /* propagate errors from reference frames */
421 xd->corrupted |= pc->yv12_fb[ref_fb_idx].corrupted;
424 vp8_build_uvmvs(xd, pc->full_pixel);
427 if(pc->current_video_frame==0 &&mb_col==1 && mb_row==0)
432 decode_macroblock(pbi, xd, mb_row * pc->mb_cols + mb_col);
434 /* check if the boolean decoder has suffered an error */
435 xd->corrupted |= vp8dx_bool_error(xd->current_bc);
440 ++xd->mode_info_context; /* next mb */
446 /* adjust to the next row of mbs */
448 &pc->yv12_fb[dst_fb_idx],
449 xd->dst.y_buffer + 16, xd->dst.u_buffer + 8, xd->dst.v_buffer + 8
452 ++xd->mode_info_context; /* skip prediction column */
456 static unsigned int read_partition_size(const unsigned char *cx_size)
458 const unsigned int size =
459 cx_size[0] + (cx_size[1] << 8) + (cx_size[2] << 16);
463 static void setup_token_decoder_partition_input(VP8D_COMP *pbi)
465 vp8_reader *bool_decoder = &pbi->bc2;
468 TOKEN_PARTITION multi_token_partition =
469 (TOKEN_PARTITION)vp8_read_literal(&pbi->bc, 2);
470 assert(vp8dx_bool_error(&pbi->bc) ||
471 multi_token_partition == pbi->common.multi_token_partition);
472 if (pbi->num_partitions > 2)
474 CHECK_MEM_ERROR(pbi->mbc, vpx_malloc((pbi->num_partitions - 1) *
475 sizeof(vp8_reader)));
476 bool_decoder = pbi->mbc;
479 for (; part_idx < pbi->num_partitions; ++part_idx)
481 if (vp8dx_start_decode(bool_decoder,
482 pbi->partitions[part_idx],
483 pbi->partition_sizes[part_idx]))
484 vpx_internal_error(&pbi->common.error, VPX_CODEC_MEM_ERROR,
485 "Failed to allocate bool decoder %d",
491 #if CONFIG_MULTITHREAD
492 /* Clamp number of decoder threads */
493 if (pbi->decoding_thread_count > pbi->num_partitions - 1)
494 pbi->decoding_thread_count = pbi->num_partitions - 1;
498 static void setup_token_decoder(VP8D_COMP *pbi,
499 const unsigned char *cx_data)
503 VP8_COMMON *pc = &pbi->common;
504 const unsigned char *user_data_end = pbi->Source + pbi->source_sz;
505 vp8_reader *bool_decoder;
506 const unsigned char *partition;
508 /* Parse number of token partitions to use */
509 const TOKEN_PARTITION multi_token_partition =
510 (TOKEN_PARTITION)vp8_read_literal(&pbi->bc, 2);
511 /* Only update the multi_token_partition field if we are sure the value
513 if (!pbi->ec_enabled || !vp8dx_bool_error(&pbi->bc))
514 pc->multi_token_partition = multi_token_partition;
516 num_part = 1 << pc->multi_token_partition;
518 /* Set up pointers to the first partition */
520 bool_decoder = &pbi->bc2;
524 CHECK_MEM_ERROR(pbi->mbc, vpx_malloc(num_part * sizeof(vp8_reader)));
525 bool_decoder = pbi->mbc;
526 partition += 3 * (num_part - 1);
529 for (i = 0; i < num_part; i++)
531 const unsigned char *partition_size_ptr = cx_data + i * 3;
532 ptrdiff_t partition_size;
534 /* Calculate the length of this partition. The last partition
537 if (i < num_part - 1)
539 partition_size = read_partition_size(partition_size_ptr);
543 partition_size = user_data_end - partition;
546 if (!pbi->ec_enabled && (partition + partition_size > user_data_end
547 || partition + partition_size < partition))
548 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
549 "Truncated packet or corrupt partition "
552 if (vp8dx_start_decode(bool_decoder, partition, partition_size))
553 vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR,
554 "Failed to allocate bool decoder %d", i + 1);
556 /* Advance to the next partition */
557 partition += partition_size;
561 #if CONFIG_MULTITHREAD
562 /* Clamp number of decoder threads */
563 if (pbi->decoding_thread_count > num_part - 1)
564 pbi->decoding_thread_count = num_part - 1;
569 static void stop_token_decoder(VP8D_COMP *pbi)
571 VP8_COMMON *pc = &pbi->common;
573 if (pc->multi_token_partition != ONE_PARTITION)
580 static void init_frame(VP8D_COMP *pbi)
582 VP8_COMMON *const pc = & pbi->common;
583 MACROBLOCKD *const xd = & pbi->mb;
585 if (pc->frame_type == KEY_FRAME)
587 /* Various keyframe initializations */
588 vpx_memcpy(pc->fc.mvc, vp8_default_mv_context, sizeof(vp8_default_mv_context));
590 vp8_init_mbmode_probs(pc);
592 vp8_default_coef_probs(pc);
593 vp8_kf_default_bmode_probs(pc->kf_bmode_prob);
595 /* reset the segment feature data to 0 with delta coding (Default state). */
596 vpx_memset(xd->segment_feature_data, 0, sizeof(xd->segment_feature_data));
597 xd->mb_segement_abs_delta = SEGMENT_DELTADATA;
599 /* reset the mode ref deltasa for loop filter */
600 vpx_memset(xd->ref_lf_deltas, 0, sizeof(xd->ref_lf_deltas));
601 vpx_memset(xd->mode_lf_deltas, 0, sizeof(xd->mode_lf_deltas));
603 /* All buffers are implicitly updated on key frames. */
604 pc->refresh_golden_frame = 1;
605 pc->refresh_alt_ref_frame = 1;
606 pc->copy_buffer_to_gf = 0;
607 pc->copy_buffer_to_arf = 0;
609 /* Note that Golden and Altref modes cannot be used on a key frame so
610 * ref_frame_sign_bias[] is undefined and meaningless
612 pc->ref_frame_sign_bias[GOLDEN_FRAME] = 0;
613 pc->ref_frame_sign_bias[ALTREF_FRAME] = 0;
617 if (!pc->use_bilinear_mc_filter)
618 pc->mcomp_filter_type = SIXTAP;
620 pc->mcomp_filter_type = BILINEAR;
622 /* To enable choice of different interploation filters */
623 if (pc->mcomp_filter_type == SIXTAP)
625 xd->subpixel_predict = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap4x4);
626 xd->subpixel_predict8x4 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap8x4);
627 xd->subpixel_predict8x8 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap8x8);
628 xd->subpixel_predict16x16 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap16x16);
632 xd->subpixel_predict = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear4x4);
633 xd->subpixel_predict8x4 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear8x4);
634 xd->subpixel_predict8x8 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear8x8);
635 xd->subpixel_predict16x16 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear16x16);
639 xd->left_context = &pc->left_context;
640 xd->mode_info_context = pc->mi;
641 xd->frame_type = pc->frame_type;
642 xd->mode_info_context->mbmi.mode = DC_PRED;
643 xd->mode_info_stride = pc->mode_info_stride;
644 xd->corrupted = 0; /* init without corruption */
647 int vp8_decode_frame(VP8D_COMP *pbi)
649 vp8_reader *const bc = & pbi->bc;
650 VP8_COMMON *const pc = & pbi->common;
651 MACROBLOCKD *const xd = & pbi->mb;
652 const unsigned char *data = (const unsigned char *)pbi->Source;
653 const unsigned char *data_end = data + pbi->source_sz;
654 ptrdiff_t first_partition_length_in_bytes;
658 const int *const mb_feature_data_bits = vp8_mb_feature_data_bits;
660 if (pbi->input_partition)
662 data = pbi->partitions[0];
663 data_end = data + pbi->partition_sizes[0];
666 /* start with no corruption of current frame */
668 pc->yv12_fb[pc->new_fb_idx].corrupted = 0;
670 if (data_end - data < 3)
674 /* Declare the missing frame as an inter frame since it will
675 be handled as an inter frame when we have estimated its
677 pc->frame_type = INTER_FRAME;
680 first_partition_length_in_bytes = 0;
684 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
690 pc->frame_type = (FRAME_TYPE)(data[0] & 1);
691 pc->version = (data[0] >> 1) & 7;
692 pc->show_frame = (data[0] >> 4) & 1;
693 first_partition_length_in_bytes =
694 (data[0] | (data[1] << 8) | (data[2] << 16)) >> 5;
697 if (!pbi->ec_enabled && (data + first_partition_length_in_bytes > data_end
698 || data + first_partition_length_in_bytes < data))
699 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
700 "Truncated packet or corrupt partition 0 length");
701 vp8_setup_version(pc);
703 if (pc->frame_type == KEY_FRAME)
705 const int Width = pc->Width;
706 const int Height = pc->Height;
708 /* vet via sync code */
709 /* When error concealment is enabled we should only check the sync
710 * code if we have enough bits available
712 if (!pbi->ec_enabled || data + 3 < data_end)
714 if (data[0] != 0x9d || data[1] != 0x01 || data[2] != 0x2a)
715 vpx_internal_error(&pc->error, VPX_CODEC_UNSUP_BITSTREAM,
716 "Invalid frame sync code");
719 /* If error concealment is enabled we should only parse the new size
720 * if we have enough data. Otherwise we will end up with the wrong
723 if (!pbi->ec_enabled || data + 6 < data_end)
725 pc->Width = (data[3] | (data[4] << 8)) & 0x3fff;
726 pc->horiz_scale = data[4] >> 6;
727 pc->Height = (data[5] | (data[6] << 8)) & 0x3fff;
728 pc->vert_scale = data[6] >> 6;
732 if (Width != pc->Width || Height != pc->Height)
734 int prev_mb_rows = pc->mb_rows;
739 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
740 "Invalid frame width");
746 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
747 "Invalid frame height");
750 if (vp8_alloc_frame_buffers(pc, pc->Width, pc->Height))
751 vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR,
752 "Failed to allocate frame buffers");
754 #if CONFIG_ERROR_CONCEALMENT
755 pbi->overlaps = NULL;
758 if (vp8_alloc_overlap_lists(pbi))
759 vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR,
760 "Failed to allocate overlap lists "
761 "for error concealment");
765 #if CONFIG_MULTITHREAD
766 if (pbi->b_multithreaded_rd)
767 vp8mt_alloc_temp_buffers(pbi, pc->Width, prev_mb_rows);
773 if (pc->Width == 0 || pc->Height == 0)
780 if (vp8dx_start_decode(bc, data, data_end - data))
781 vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR,
782 "Failed to allocate bool decoder 0");
783 if (pc->frame_type == KEY_FRAME) {
784 pc->clr_type = (YUV_TYPE)vp8_read_bit(bc);
785 pc->clamp_type = (CLAMP_TYPE)vp8_read_bit(bc);
788 /* Is segmentation enabled */
789 xd->segmentation_enabled = (unsigned char)vp8_read_bit(bc);
791 if (xd->segmentation_enabled)
793 /* Signal whether or not the segmentation map is being explicitly updated this frame. */
794 xd->update_mb_segmentation_map = (unsigned char)vp8_read_bit(bc);
795 xd->update_mb_segmentation_data = (unsigned char)vp8_read_bit(bc);
797 if (xd->update_mb_segmentation_data)
799 xd->mb_segement_abs_delta = (unsigned char)vp8_read_bit(bc);
801 vpx_memset(xd->segment_feature_data, 0, sizeof(xd->segment_feature_data));
803 /* For each segmentation feature (Quant and loop filter level) */
804 for (i = 0; i < MB_LVL_MAX; i++)
806 for (j = 0; j < MAX_MB_SEGMENTS; j++)
808 /* Frame level data */
809 if (vp8_read_bit(bc))
811 xd->segment_feature_data[i][j] = (signed char)vp8_read_literal(bc, mb_feature_data_bits[i]);
813 if (vp8_read_bit(bc))
814 xd->segment_feature_data[i][j] = -xd->segment_feature_data[i][j];
817 xd->segment_feature_data[i][j] = 0;
822 if (xd->update_mb_segmentation_map)
824 /* Which macro block level features are enabled */
825 vpx_memset(xd->mb_segment_tree_probs, 255, sizeof(xd->mb_segment_tree_probs));
827 /* Read the probs used to decode the segment id for each macro block. */
828 for (i = 0; i < MB_FEATURE_TREE_PROBS; i++)
830 /* If not explicitly set value is defaulted to 255 by memset above */
831 if (vp8_read_bit(bc))
832 xd->mb_segment_tree_probs[i] = (vp8_prob)vp8_read_literal(bc, 8);
837 /* Read the loop filter level and type */
838 pc->filter_type = (LOOPFILTERTYPE) vp8_read_bit(bc);
839 pc->filter_level = vp8_read_literal(bc, 6);
840 pc->sharpness_level = vp8_read_literal(bc, 3);
842 /* Read in loop filter deltas applied at the MB level based on mode or ref frame. */
843 xd->mode_ref_lf_delta_update = 0;
844 xd->mode_ref_lf_delta_enabled = (unsigned char)vp8_read_bit(bc);
846 if (xd->mode_ref_lf_delta_enabled)
848 /* Do the deltas need to be updated */
849 xd->mode_ref_lf_delta_update = (unsigned char)vp8_read_bit(bc);
851 if (xd->mode_ref_lf_delta_update)
854 for (i = 0; i < MAX_REF_LF_DELTAS; i++)
856 if (vp8_read_bit(bc))
858 /*sign = vp8_read_bit( bc );*/
859 xd->ref_lf_deltas[i] = (signed char)vp8_read_literal(bc, 6);
861 if (vp8_read_bit(bc)) /* Apply sign */
862 xd->ref_lf_deltas[i] = xd->ref_lf_deltas[i] * -1;
867 for (i = 0; i < MAX_MODE_LF_DELTAS; i++)
869 if (vp8_read_bit(bc))
871 /*sign = vp8_read_bit( bc );*/
872 xd->mode_lf_deltas[i] = (signed char)vp8_read_literal(bc, 6);
874 if (vp8_read_bit(bc)) /* Apply sign */
875 xd->mode_lf_deltas[i] = xd->mode_lf_deltas[i] * -1;
881 if (pbi->input_partition)
883 setup_token_decoder_partition_input(pbi);
887 setup_token_decoder(pbi, data + first_partition_length_in_bytes);
889 xd->current_bc = &pbi->bc2;
891 /* Read the default quantizers. */
895 Q = vp8_read_literal(bc, 7); /* AC 1st order Q = default */
898 pc->y1dc_delta_q = get_delta_q(bc, pc->y1dc_delta_q, &q_update);
899 pc->y2dc_delta_q = get_delta_q(bc, pc->y2dc_delta_q, &q_update);
900 pc->y2ac_delta_q = get_delta_q(bc, pc->y2ac_delta_q, &q_update);
901 pc->uvdc_delta_q = get_delta_q(bc, pc->uvdc_delta_q, &q_update);
902 pc->uvac_delta_q = get_delta_q(bc, pc->uvac_delta_q, &q_update);
905 vp8cx_init_de_quantizer(pbi);
907 /* MB level dequantizer setup */
908 mb_init_dequantizer(pbi, &pbi->mb);
911 /* Determine if the golden frame or ARF buffer should be updated and how.
912 * For all non key frames the GF and ARF refresh flags and sign bias
913 * flags must be set explicitly.
915 if (pc->frame_type != KEY_FRAME)
917 /* Should the GF or ARF be updated from the current frame */
918 pc->refresh_golden_frame = vp8_read_bit(bc);
919 #if CONFIG_ERROR_CONCEALMENT
920 /* Assume we shouldn't refresh golden if the bit is missing */
921 xd->corrupted |= vp8dx_bool_error(bc);
922 if (pbi->ec_enabled && xd->corrupted)
923 pc->refresh_golden_frame = 0;
926 pc->refresh_alt_ref_frame = vp8_read_bit(bc);
927 #if CONFIG_ERROR_CONCEALMENT
928 /* Assume we shouldn't refresh altref if the bit is missing */
929 xd->corrupted |= vp8dx_bool_error(bc);
930 if (pbi->ec_enabled && xd->corrupted)
931 pc->refresh_alt_ref_frame = 0;
934 /* Buffer to buffer copy flags. */
935 pc->copy_buffer_to_gf = 0;
937 if (!pc->refresh_golden_frame)
938 pc->copy_buffer_to_gf = vp8_read_literal(bc, 2);
940 pc->copy_buffer_to_arf = 0;
942 if (!pc->refresh_alt_ref_frame)
943 pc->copy_buffer_to_arf = vp8_read_literal(bc, 2);
945 pc->ref_frame_sign_bias[GOLDEN_FRAME] = vp8_read_bit(bc);
946 pc->ref_frame_sign_bias[ALTREF_FRAME] = vp8_read_bit(bc);
949 pc->refresh_entropy_probs = vp8_read_bit(bc);
950 if (pc->refresh_entropy_probs == 0)
952 vpx_memcpy(&pc->lfc, &pc->fc, sizeof(pc->fc));
955 pc->refresh_last_frame = pc->frame_type == KEY_FRAME || vp8_read_bit(bc);
957 #if CONFIG_ERROR_CONCEALMENT
958 /* Assume we should refresh the last frame if the bit is missing */
959 xd->corrupted |= vp8dx_bool_error(bc);
960 if (pbi->ec_enabled && xd->corrupted)
961 pc->refresh_last_frame = 1;
966 FILE *z = fopen("decodestats.stt", "a");
967 fprintf(z, "%6d F:%d,G:%d,A:%d,L:%d,Q:%d\n",
968 pc->current_video_frame,
970 pc->refresh_golden_frame,
971 pc->refresh_alt_ref_frame,
972 pc->refresh_last_frame,
978 /* read coef probability tree */
979 for (i = 0; i < BLOCK_TYPES; i++)
980 for (j = 0; j < COEF_BANDS; j++)
981 for (k = 0; k < PREV_COEF_CONTEXTS; k++)
982 for (l = 0; l < ENTROPY_NODES; l++)
985 vp8_prob *const p = pc->fc.coef_probs [i][j][k] + l;
987 if (vp8_read(bc, vp8_coef_update_probs [i][j][k][l]))
989 *p = (vp8_prob)vp8_read_literal(bc, 8);
995 vpx_memcpy(&xd->pre, &pc->yv12_fb[pc->lst_fb_idx], sizeof(YV12_BUFFER_CONFIG));
996 vpx_memcpy(&xd->dst, &pc->yv12_fb[pc->new_fb_idx], sizeof(YV12_BUFFER_CONFIG));
998 /* set up frame new frame for intra coded blocks */
999 #if CONFIG_MULTITHREAD
1000 if (!(pbi->b_multithreaded_rd) || pc->multi_token_partition == ONE_PARTITION || !(pc->filter_level))
1002 vp8_setup_intra_recon(&pc->yv12_fb[pc->new_fb_idx]);
1004 vp8_setup_block_dptrs(xd);
1006 vp8_build_block_doffsets(xd);
1008 /* clear out the coeff buffer */
1009 vpx_memset(xd->qcoeff, 0, sizeof(xd->qcoeff));
1011 /* Read the mb_no_coeff_skip flag */
1012 pc->mb_no_coeff_skip = (int)vp8_read_bit(bc);
1015 vp8_decode_mode_mvs(pbi);
1017 #if CONFIG_ERROR_CONCEALMENT
1018 if (pbi->ec_enabled &&
1019 pbi->mvs_corrupt_from_mb < (unsigned int)pc->mb_cols * pc->mb_rows)
1021 /* Motion vectors are missing in this frame. We will try to estimate
1022 * them and then continue decoding the frame as usual */
1023 vp8_estimate_missing_mvs(pbi);
1027 vpx_memset(pc->above_context, 0, sizeof(ENTROPY_CONTEXT_PLANES) * pc->mb_cols);
1029 #if CONFIG_MULTITHREAD
1030 if (pbi->b_multithreaded_rd && pc->multi_token_partition != ONE_PARTITION)
1032 vp8mt_decode_mb_rows(pbi, xd);
1033 vp8_yv12_extend_frame_borders_ptr(&pc->yv12_fb[pc->new_fb_idx]); /*cm->frame_to_show);*/
1039 int num_part = 1 << pc->multi_token_partition;
1041 /* Decode the individual macro block */
1042 for (mb_row = 0; mb_row < pc->mb_rows; mb_row++)
1047 xd->current_bc = & pbi->mbc[ibc];
1050 if (ibc == num_part)
1054 decode_mb_row(pbi, pc, mb_row, xd);
1058 stop_token_decoder(pbi);
1060 /* Collect information about decoder corruption. */
1061 /* 1. Check first boolean decoder for errors. */
1062 pc->yv12_fb[pc->new_fb_idx].corrupted =
1063 vp8dx_bool_error(bc);
1064 /* 2. Check the macroblock information */
1065 pc->yv12_fb[pc->new_fb_idx].corrupted |=
1068 /* vpx_log("Decoder: Frame Decoded, Size Roughly:%d bytes \n",bc->pos+pbi->bc2.pos); */
1070 /* If this was a kf or Gf note the Q used */
1071 if ((pc->frame_type == KEY_FRAME) ||
1072 pc->refresh_golden_frame || pc->refresh_alt_ref_frame)
1074 pc->last_kf_gf_q = pc->base_qindex;
1077 if (pc->refresh_entropy_probs == 0)
1079 vpx_memcpy(&pc->fc, &pc->lfc, sizeof(pc->fc));
1082 #ifdef PACKET_TESTING
1084 FILE *f = fopen("decompressor.VP8", "ab");
1085 unsigned int size = pbi->bc2.pos + pbi->bc.pos + 8;
1086 fwrite((void *) &size, 4, 1, f);
1087 fwrite((void *) pbi->Source, size, 1, f);