2 * Copyright (c) 2010 The VP8 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"
14 #include "reconintra.h"
15 #include "reconintra4x4.h"
17 #include "reconinter.h"
18 #include "dequantize.h"
19 #include "detokenize.h"
21 #include "alloccommon.h"
22 #include "entropymode.h"
23 #include "quant_common.h"
24 #include "segmentation_common.h"
25 #include "setupintrarecon.h"
29 #include "vpx_mem/vpx_mem.h"
31 #include "dequantize.h"
32 #include "predictdc.h"
33 #include "threading.h"
34 #include "decoderthreading.h"
35 #include "dboolhuff.h"
40 void vp8cx_init_de_quantizer(VP8D_COMP *pbi)
45 VP8_COMMON *const pc = & pbi->common;
47 for (Q = 0; Q < QINDEX_RANGE; Q++)
49 pc->Y1dequant[Q][0][0] = (short)vp8_dc_quant(Q, pc->y1dc_delta_q);
50 pc->Y2dequant[Q][0][0] = (short)vp8_dc2quant(Q, pc->y2dc_delta_q);
51 pc->UVdequant[Q][0][0] = (short)vp8_dc_uv_quant(Q, pc->uvdc_delta_q);
53 // all the ac values = ;
54 for (i = 1; i < 16; i++)
56 int rc = vp8_default_zig_zag1d[i];
60 pc->Y1dequant[Q][r][c] = (short)vp8_ac_yquant(Q);
61 pc->Y2dequant[Q][r][c] = (short)vp8_ac2quant(Q, pc->y2ac_delta_q);
62 pc->UVdequant[Q][r][c] = (short)vp8_ac_uv_quant(Q, pc->uvac_delta_q);
67 static 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.
114 static void skip_recon_mb(VP8D_COMP *pbi, MACROBLOCKD *xd)
116 if (xd->frame_type == KEY_FRAME || xd->mbmi.ref_frame == INTRA_FRAME)
119 vp8_build_intra_predictors_mbuv_s(xd);
120 vp8_build_intra_predictors_mby_s_ptr(xd);
125 vp8_build_inter_predictors_mb_s(xd);
130 static void clamp_mv_to_umv_border(MV *mv, const MACROBLOCKD *xd)
132 /* If the MV points so far into the UMV border that no visible pixels
133 * are used for reconstruction, the subpel part of the MV can be
134 * discarded and the MV limited to 16 pixels with equivalent results.
136 * This limit kicks in at 19 pixels for the top and left edges, for
137 * the 16 pixels plus 3 taps right of the central pixel when subpel
138 * filtering. The bottom and right edges use 16 pixels plus 2 pixels
139 * left of the central pixel when filtering.
141 if (mv->col < (xd->mb_to_left_edge - (19 << 3)))
142 mv->col = xd->mb_to_left_edge - (16 << 3);
143 else if (mv->col > xd->mb_to_right_edge + (18 << 3))
144 mv->col = xd->mb_to_right_edge + (16 << 3);
146 if (mv->row < (xd->mb_to_top_edge - (19 << 3)))
147 mv->row = xd->mb_to_top_edge - (16 << 3);
148 else if (mv->row > xd->mb_to_bottom_edge + (18 << 3))
149 mv->row = xd->mb_to_bottom_edge + (16 << 3);
153 static void clamp_mvs(MACROBLOCKD *xd)
155 if (xd->mbmi.mode == SPLITMV)
160 clamp_mv_to_umv_border(&xd->block[i].bmi.mv.as_mv, xd);
164 clamp_mv_to_umv_border(&xd->mbmi.mv.as_mv, xd);
165 clamp_mv_to_umv_border(&xd->block[16].bmi.mv.as_mv, xd);
170 static void reconstruct_mb(VP8D_COMP *pbi, MACROBLOCKD *xd)
172 if (xd->frame_type == KEY_FRAME || xd->mbmi.ref_frame == INTRA_FRAME)
174 vp8_build_intra_predictors_mbuv(xd);
176 if (xd->mbmi.mode != B_PRED)
178 vp8_build_intra_predictors_mby_ptr(xd);
179 vp8_recon16x16mb(RTCD_VTABLE(recon), xd);
183 vp8_recon_intra4x4mb(RTCD_VTABLE(recon), xd);
188 vp8_build_inter_predictors_mb(xd);
189 vp8_recon16x16mb(RTCD_VTABLE(recon), xd);
194 static void de_quantand_idct(VP8D_COMP *pbi, MACROBLOCKD *xd)
197 BLOCKD *b = &xd->block[24];
200 if (xd->mbmi.mode != B_PRED && xd->mbmi.mode != SPLITMV)
202 DEQUANT_INVOKE(&pbi->dequant, block)(b);
204 // do 2nd order transform on the dc block
207 IDCT_INVOKE(RTCD_VTABLE(idct), iwalsh16)(&b->dqcoeff[0], b->diff);
208 ((int *)b->qcoeff)[0] = 0;
209 ((int *)b->qcoeff)[1] = 0;
210 ((int *)b->qcoeff)[2] = 0;
211 ((int *)b->qcoeff)[3] = 0;
212 ((int *)b->qcoeff)[4] = 0;
213 ((int *)b->qcoeff)[5] = 0;
214 ((int *)b->qcoeff)[6] = 0;
215 ((int *)b->qcoeff)[7] = 0;
219 IDCT_INVOKE(RTCD_VTABLE(idct), iwalsh1)(&b->dqcoeff[0], b->diff);
220 ((int *)b->qcoeff)[0] = 0;
224 for (i = 0; i < 16; i++)
231 DEQUANT_INVOKE(&pbi->dequant, idct_dc)(b->qcoeff, &b->dequant[0][0], b->diff, 32, xd->block[24].diff[i]);
235 IDCT_INVOKE(RTCD_VTABLE(idct), idct1_scalar)(xd->block[24].diff[i], b->diff, 32);
239 for (i = 16; i < 24; i++)
245 DEQUANT_INVOKE(&pbi->dequant, idct)(b->qcoeff, &b->dequant[0][0], b->diff, 16);
249 IDCT_INVOKE(RTCD_VTABLE(idct), idct1_scalar)(b->qcoeff[0] * b->dequant[0][0], b->diff, 16);
250 ((int *)b->qcoeff)[0] = 0;
256 for (i = 0; i < 24; i++)
263 DEQUANT_INVOKE(&pbi->dequant, idct)(b->qcoeff, &b->dequant[0][0], b->diff, (32 - (i & 16)));
267 IDCT_INVOKE(RTCD_VTABLE(idct), idct1_scalar)(b->qcoeff[0] * b->dequant[0][0], b->diff, (32 - (i & 16)));
268 ((int *)b->qcoeff)[0] = 0;
274 void vp8_decode_macroblock(VP8D_COMP *pbi, MACROBLOCKD *xd)
278 int i, do_clamp = xd->mbmi.need_to_clamp_mvs;
280 if (xd->mbmi.mb_skip_coeff)
282 vp8_reset_mb_tokens_context(xd);
286 eobtotal = vp8_decode_mb_tokens(pbi, xd);
289 /* Perform temporary clamping of the MV to be used for prediction */
292 if (xd->mbmi.mode == SPLITMV)
294 orig_mvs[i] = xd->block[i].bmi.mv.as_mv;
297 orig_mvs[0] = xd->mbmi.mv.as_mv;
298 orig_mvs[1] = xd->block[16].bmi.mv.as_mv;
303 xd->mode_info_context->mbmi.dc_diff = 1;
306 if (xd->mbmi.mode != B_PRED && xd->mbmi.mode != SPLITMV && eobtotal == 0)
308 xd->mode_info_context->mbmi.dc_diff = 0;
309 skip_recon_mb(pbi, xd);
313 if (xd->segmentation_enabled)
314 mb_init_dequantizer(pbi, xd);
316 de_quantand_idct(pbi, xd);
317 reconstruct_mb(pbi, xd);
321 /* Restore the original MV so as not to affect the entropy context. */
324 if (xd->mbmi.mode == SPLITMV)
326 xd->block[i].bmi.mv.as_mv = orig_mvs[i];
329 xd->mbmi.mv.as_mv = orig_mvs[0];
330 xd->block[16].bmi.mv.as_mv = orig_mvs[1];
335 static int get_delta_q(vp8_reader *bc, int prev, int *q_update)
339 if (vp8_read_bit(bc))
341 ret_val = vp8_read_literal(bc, 4);
343 if (vp8_read_bit(bc))
347 /* Trigger a quantizer update if the delta-q value has changed */
354 #ifdef PACKET_TESTING
361 void vp8_decode_mb_row(VP8D_COMP *pbi,
368 int recon_yoffset, recon_uvoffset;
370 int recon_y_stride = pc->last_frame.y_stride;
371 int recon_uv_stride = pc->last_frame.uv_stride;
373 vpx_memset(pc->left_context, 0, sizeof(pc->left_context));
374 recon_yoffset = mb_row * recon_y_stride * 16;
375 recon_uvoffset = mb_row * recon_uv_stride * 8;
376 // reset above block coeffs
378 xd->above_context[Y1CONTEXT] = pc->above_context[Y1CONTEXT];
379 xd->above_context[UCONTEXT ] = pc->above_context[UCONTEXT];
380 xd->above_context[VCONTEXT ] = pc->above_context[VCONTEXT];
381 xd->above_context[Y2CONTEXT] = pc->above_context[Y2CONTEXT];
382 xd->up_available = (mb_row != 0);
384 xd->mb_to_top_edge = -((mb_row * 16)) << 3;
385 xd->mb_to_bottom_edge = ((pc->mb_rows - 1 - mb_row) * 16) << 3;
387 for (mb_col = 0; mb_col < pc->mb_cols; mb_col++)
389 // Take a copy of the mode and Mv information for this macroblock into the xd->mbmi
390 // the partition_bmi array is unused in the decoder, so don't copy it.
391 vpx_memcpy(&xd->mbmi, &xd->mode_info_context->mbmi,
392 sizeof(MB_MODE_INFO) - sizeof(xd->mbmi.partition_bmi));
394 if (xd->mbmi.mode == SPLITMV || xd->mbmi.mode == B_PRED)
396 for (i = 0; i < 16; i++)
398 BLOCKD *d = &xd->block[i];
399 vpx_memcpy(&d->bmi, &xd->mode_info_context->bmi[i], sizeof(B_MODE_INFO));
403 // Distance of Mb to the various image edges.
404 // These specified to 8th pel as they are always compared to values that are in 1/8th pel units
405 xd->mb_to_left_edge = -((mb_col * 16) << 3);
406 xd->mb_to_right_edge = ((pc->mb_cols - 1 - mb_col) * 16) << 3;
408 xd->dst.y_buffer = pc->new_frame.y_buffer + recon_yoffset;
409 xd->dst.u_buffer = pc->new_frame.u_buffer + recon_uvoffset;
410 xd->dst.v_buffer = pc->new_frame.v_buffer + recon_uvoffset;
412 xd->left_available = (mb_col != 0);
414 // Select the appropriate reference frame for this MB
415 if (xd->mbmi.ref_frame == LAST_FRAME)
417 xd->pre.y_buffer = pc->last_frame.y_buffer + recon_yoffset;
418 xd->pre.u_buffer = pc->last_frame.u_buffer + recon_uvoffset;
419 xd->pre.v_buffer = pc->last_frame.v_buffer + recon_uvoffset;
421 else if (xd->mbmi.ref_frame == GOLDEN_FRAME)
423 // Golden frame reconstruction buffer
424 xd->pre.y_buffer = pc->golden_frame.y_buffer + recon_yoffset;
425 xd->pre.u_buffer = pc->golden_frame.u_buffer + recon_uvoffset;
426 xd->pre.v_buffer = pc->golden_frame.v_buffer + recon_uvoffset;
430 // Alternate reference frame reconstruction buffer
431 xd->pre.y_buffer = pc->alt_ref_frame.y_buffer + recon_yoffset;
432 xd->pre.u_buffer = pc->alt_ref_frame.u_buffer + recon_uvoffset;
433 xd->pre.v_buffer = pc->alt_ref_frame.v_buffer + recon_uvoffset;
436 vp8_build_uvmvs(xd, pc->full_pixel);
439 if(pbi->common.current_video_frame==0 &&mb_col==1 && mb_row==0)
444 vp8dx_bool_decoder_fill(xd->current_bc);
445 vp8_decode_macroblock(pbi, xd);
451 ++xd->mode_info_context; /* next mb */
453 xd->gf_active_ptr++; // GF useage flag for next MB
455 xd->above_context[Y1CONTEXT] += 4;
456 xd->above_context[UCONTEXT ] += 2;
457 xd->above_context[VCONTEXT ] += 2;
458 xd->above_context[Y2CONTEXT] ++;
460 pbi->current_mb_col_main = mb_col;
463 // adjust to the next row of mbs
466 xd->dst.y_buffer + 16, xd->dst.u_buffer + 8, xd->dst.v_buffer + 8
469 ++xd->mode_info_context; /* skip prediction column */
471 pbi->last_mb_row_decoded = mb_row;
475 static unsigned int read_partition_size(const unsigned char *cx_size)
477 const unsigned int size =
478 cx_size[0] + (cx_size[1] << 8) + (cx_size[2] << 16);
483 static void setup_token_decoder(VP8D_COMP *pbi,
484 const unsigned char *cx_data)
488 VP8_COMMON *pc = &pbi->common;
489 const unsigned char *user_data_end = pbi->Source + pbi->source_sz;
490 vp8_reader *bool_decoder;
491 const unsigned char *partition;
493 /* Parse number of token partitions to use */
494 pc->multi_token_partition = (TOKEN_PARTITION)vp8_read_literal(&pbi->bc, 2);
495 num_part = 1 << pc->multi_token_partition;
497 /* Set up pointers to the first partition */
499 bool_decoder = &pbi->bc2;
503 CHECK_MEM_ERROR(pbi->mbc, vpx_malloc(num_part * sizeof(vp8_reader)));
504 bool_decoder = pbi->mbc;
505 partition += 3 * (num_part - 1);
508 for (i = 0; i < num_part; i++)
510 const unsigned char *partition_size_ptr = cx_data + i * 3;
511 unsigned int partition_size;
513 /* Calculate the length of this partition. The last partition
516 if (i < num_part - 1)
518 partition_size = read_partition_size(partition_size_ptr);
522 partition_size = user_data_end - partition;
525 if (partition + partition_size > user_data_end)
526 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
527 "Truncated packet or corrupt partition "
530 if (vp8dx_start_decode(bool_decoder, IF_RTCD(&pbi->dboolhuff),
531 partition, partition_size))
532 vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR,
533 "Failed to allocate bool decoder %d", i + 1);
535 /* Advance to the next partition */
536 partition += partition_size;
540 /* Clamp number of decoder threads */
541 if (pbi->decoding_thread_count > num_part - 1)
542 pbi->decoding_thread_count = num_part - 1;
546 static void stop_token_decoder(VP8D_COMP *pbi)
549 VP8_COMMON *pc = &pbi->common;
551 if (pc->multi_token_partition != ONE_PARTITION)
553 int num_part = (1 << pc->multi_token_partition);
555 for (i = 0; i < num_part; i++)
557 vp8dx_stop_decode(&pbi->mbc[i]);
563 vp8dx_stop_decode(& pbi->bc2);
566 static void init_frame(VP8D_COMP *pbi)
568 VP8_COMMON *const pc = & pbi->common;
569 MACROBLOCKD *const xd = & pbi->mb;
571 if (pc->frame_type == KEY_FRAME)
573 // Various keyframe initializations
574 vpx_memcpy(pc->fc.mvc, vp8_default_mv_context, sizeof(vp8_default_mv_context));
576 vp8_init_mbmode_probs(pc);
578 vp8_default_coef_probs(pc);
579 vp8_kf_default_bmode_probs(pc->kf_bmode_prob);
581 // reset the segment feature data to 0 with delta coding (Default state).
582 vpx_memset(xd->segment_feature_data, 0, sizeof(xd->segment_feature_data));
583 xd->mb_segement_abs_delta = SEGMENT_DELTADATA;
585 // reset the mode ref deltasa for loop filter
586 vpx_memset(xd->ref_lf_deltas, 0, sizeof(xd->ref_lf_deltas));
587 vpx_memset(xd->mode_lf_deltas, 0, sizeof(xd->mode_lf_deltas));
589 // All buffers are implicitly updated on key frames.
590 pc->refresh_golden_frame = 1;
591 pc->refresh_alt_ref_frame = 1;
592 pc->copy_buffer_to_gf = 0;
593 pc->copy_buffer_to_arf = 0;
595 // Note that Golden and Altref modes cannot be used on a key frame so
596 // ref_frame_sign_bias[] is undefined and meaningless
597 pc->ref_frame_sign_bias[GOLDEN_FRAME] = 0;
598 pc->ref_frame_sign_bias[ALTREF_FRAME] = 0;
602 if (!pc->use_bilinear_mc_filter)
603 pc->mcomp_filter_type = SIXTAP;
605 pc->mcomp_filter_type = BILINEAR;
607 // To enable choice of different interploation filters
608 if (pc->mcomp_filter_type == SIXTAP)
610 xd->subpixel_predict = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap4x4);
611 xd->subpixel_predict8x4 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap8x4);
612 xd->subpixel_predict8x8 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap8x8);
613 xd->subpixel_predict16x16 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap16x16);
617 xd->subpixel_predict = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear4x4);
618 xd->subpixel_predict8x4 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear8x4);
619 xd->subpixel_predict8x8 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear8x8);
620 xd->subpixel_predict16x16 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear16x16);
624 xd->left_context = pc->left_context;
625 xd->mode_info_context = pc->mi;
626 xd->frame_type = pc->frame_type;
627 xd->mbmi.mode = DC_PRED;
628 xd->mode_info_stride = pc->mode_info_stride;
631 int vp8_decode_frame(VP8D_COMP *pbi)
633 vp8_reader *const bc = & pbi->bc;
634 VP8_COMMON *const pc = & pbi->common;
635 MACROBLOCKD *const xd = & pbi->mb;
636 const unsigned char *data = (const unsigned char *)pbi->Source;
637 const unsigned char *const data_end = data + pbi->source_sz;
638 int first_partition_length_in_bytes;
642 const int *const mb_feature_data_bits = vp8_mb_feature_data_bits;
644 pc->frame_type = (FRAME_TYPE)(data[0] & 1);
645 pc->version = (data[0] >> 1) & 7;
646 pc->show_frame = (data[0] >> 4) & 1;
647 first_partition_length_in_bytes =
648 (data[0] | (data[1] << 8) | (data[2] << 16)) >> 5;
651 if (data + first_partition_length_in_bytes > data_end)
652 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
653 "Truncated packet or corrupt partition 0 length");
654 vp8_setup_version(pc);
656 if (pc->frame_type == KEY_FRAME)
658 const int Width = pc->Width;
659 const int Height = pc->Height;
662 if (data[0] != 0x9d || data[1] != 0x01 || data[2] != 0x2a)
663 vpx_internal_error(&pc->error, VPX_CODEC_UNSUP_BITSTREAM,
664 "Invalid frame sync code");
666 pc->Width = (data[3] | (data[4] << 8)) & 0x3fff;
667 pc->horiz_scale = data[4] >> 6;
668 pc->Height = (data[5] | (data[6] << 8)) & 0x3fff;
669 pc->vert_scale = data[6] >> 6;
672 if (Width != pc->Width || Height != pc->Height)
677 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
678 "Invalid frame width");
684 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
685 "Invalid frame height");
688 if (vp8_alloc_frame_buffers(&pbi->common, pc->Width, pc->Height))
689 vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR,
690 "Failed to allocate frame buffers");
694 if (pc->Width == 0 || pc->Height == 0)
701 if (vp8dx_start_decode(bc, IF_RTCD(&pbi->dboolhuff),
702 data, data_end - data))
703 vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR,
704 "Failed to allocate bool decoder 0");
705 if (pc->frame_type == KEY_FRAME) {
706 pc->clr_type = (YUV_TYPE)vp8_read_bit(bc);
707 pc->clamp_type = (CLAMP_TYPE)vp8_read_bit(bc);
710 // Is segmentation enabled
711 xd->segmentation_enabled = (unsigned char)vp8_read_bit(bc);
713 if (xd->segmentation_enabled)
715 // Signal whether or not the segmentation map is being explicitly updated this frame.
716 xd->update_mb_segmentation_map = (unsigned char)vp8_read_bit(bc);
717 xd->update_mb_segmentation_data = (unsigned char)vp8_read_bit(bc);
719 if (xd->update_mb_segmentation_data)
721 xd->mb_segement_abs_delta = (unsigned char)vp8_read_bit(bc);
723 vpx_memset(xd->segment_feature_data, 0, sizeof(xd->segment_feature_data));
725 // For each segmentation feature (Quant and loop filter level)
726 for (i = 0; i < MB_LVL_MAX; i++)
728 for (j = 0; j < MAX_MB_SEGMENTS; j++)
731 if (vp8_read_bit(bc))
733 xd->segment_feature_data[i][j] = (signed char)vp8_read_literal(bc, mb_feature_data_bits[i]);
735 if (vp8_read_bit(bc))
736 xd->segment_feature_data[i][j] = -xd->segment_feature_data[i][j];
739 xd->segment_feature_data[i][j] = 0;
744 if (xd->update_mb_segmentation_map)
746 // Which macro block level features are enabled
747 vpx_memset(xd->mb_segment_tree_probs, 255, sizeof(xd->mb_segment_tree_probs));
749 // Read the probs used to decode the segment id for each macro block.
750 for (i = 0; i < MB_FEATURE_TREE_PROBS; i++)
752 // If not explicitly set value is defaulted to 255 by memset above
753 if (vp8_read_bit(bc))
754 xd->mb_segment_tree_probs[i] = (vp8_prob)vp8_read_literal(bc, 8);
759 // Read the loop filter level and type
760 pc->filter_type = (LOOPFILTERTYPE) vp8_read_bit(bc);
761 pc->filter_level = vp8_read_literal(bc, 6);
762 pc->sharpness_level = vp8_read_literal(bc, 3);
764 // Read in loop filter deltas applied at the MB level based on mode or ref frame.
765 xd->mode_ref_lf_delta_update = 0;
766 xd->mode_ref_lf_delta_enabled = (unsigned char)vp8_read_bit(bc);
768 if (xd->mode_ref_lf_delta_enabled)
770 // Do the deltas need to be updated
771 xd->mode_ref_lf_delta_update = (unsigned char)vp8_read_bit(bc);
773 if (xd->mode_ref_lf_delta_update)
776 for (i = 0; i < MAX_REF_LF_DELTAS; i++)
778 if (vp8_read_bit(bc))
780 //sign = vp8_read_bit( bc );
781 xd->ref_lf_deltas[i] = (signed char)vp8_read_literal(bc, 6);
783 if (vp8_read_bit(bc)) // Apply sign
784 xd->ref_lf_deltas[i] = xd->ref_lf_deltas[i] * -1;
789 for (i = 0; i < MAX_MODE_LF_DELTAS; i++)
791 if (vp8_read_bit(bc))
793 //sign = vp8_read_bit( bc );
794 xd->mode_lf_deltas[i] = (signed char)vp8_read_literal(bc, 6);
796 if (vp8_read_bit(bc)) // Apply sign
797 xd->mode_lf_deltas[i] = xd->mode_lf_deltas[i] * -1;
803 setup_token_decoder(pbi, data + first_partition_length_in_bytes);
804 xd->current_bc = &pbi->bc2;
806 // Read the default quantizers.
810 Q = vp8_read_literal(bc, 7); // AC 1st order Q = default
813 pc->y1dc_delta_q = get_delta_q(bc, pc->y1dc_delta_q, &q_update);
814 pc->y2dc_delta_q = get_delta_q(bc, pc->y2dc_delta_q, &q_update);
815 pc->y2ac_delta_q = get_delta_q(bc, pc->y2ac_delta_q, &q_update);
816 pc->uvdc_delta_q = get_delta_q(bc, pc->uvdc_delta_q, &q_update);
817 pc->uvac_delta_q = get_delta_q(bc, pc->uvac_delta_q, &q_update);
820 vp8cx_init_de_quantizer(pbi);
822 // MB level dequantizer setup
823 mb_init_dequantizer(pbi, &pbi->mb);
826 // Determine if the golden frame or ARF buffer should be updated and how.
827 // For all non key frames the GF and ARF refresh flags and sign bias
828 // flags must be set explicitly.
829 if (pc->frame_type != KEY_FRAME)
831 // Should the GF or ARF be updated from the current frame
832 pc->refresh_golden_frame = vp8_read_bit(bc);
833 pc->refresh_alt_ref_frame = vp8_read_bit(bc);
835 // Buffer to buffer copy flags.
836 pc->copy_buffer_to_gf = 0;
838 if (!pc->refresh_golden_frame)
839 pc->copy_buffer_to_gf = vp8_read_literal(bc, 2);
841 pc->copy_buffer_to_arf = 0;
843 if (!pc->refresh_alt_ref_frame)
844 pc->copy_buffer_to_arf = vp8_read_literal(bc, 2);
846 pc->ref_frame_sign_bias[GOLDEN_FRAME] = vp8_read_bit(bc);
847 pc->ref_frame_sign_bias[ALTREF_FRAME] = vp8_read_bit(bc);
850 pc->refresh_entropy_probs = vp8_read_bit(bc);
851 if (pc->refresh_entropy_probs == 0)
853 vpx_memcpy(&pc->lfc, &pc->fc, sizeof(pc->fc));
856 pc->refresh_last_frame = pc->frame_type == KEY_FRAME || vp8_read_bit(bc);
860 FILE *z = fopen("decodestats.stt", "a");
861 fprintf(z, "%6d F:%d,G:%d,A:%d,L:%d,Q:%d\n",
862 pc->current_video_frame,
864 pc->refresh_golden_frame,
865 pc->refresh_alt_ref_frame,
866 pc->refresh_last_frame,
872 vp8dx_bool_decoder_fill(bc);
874 // read coef probability tree
876 for (i = 0; i < BLOCK_TYPES; i++)
877 for (j = 0; j < COEF_BANDS; j++)
878 for (k = 0; k < PREV_COEF_CONTEXTS; k++)
879 for (l = 0; l < MAX_ENTROPY_TOKENS - 1; l++)
882 vp8_prob *const p = pc->fc.coef_probs [i][j][k] + l;
884 if (vp8_read(bc, vp8_coef_update_probs [i][j][k][l]))
886 *p = (vp8_prob)vp8_read_literal(bc, 8);
892 vpx_memcpy(&xd->pre, &pc->last_frame, sizeof(YV12_BUFFER_CONFIG));
893 vpx_memcpy(&xd->dst, &pc->new_frame, sizeof(YV12_BUFFER_CONFIG));
895 // set up frame new frame for intra coded blocks
896 vp8_setup_intra_recon(&pc->new_frame);
898 vp8_setup_block_dptrs(xd);
900 vp8_build_block_doffsets(xd);
902 // clear out the coeff buffer
903 vpx_memset(xd->qcoeff, 0, sizeof(xd->qcoeff));
905 // Read the mb_no_coeff_skip flag
906 pc->mb_no_coeff_skip = (int)vp8_read_bit(bc);
908 if (pc->frame_type == KEY_FRAME)
909 vp8_kfread_modes(pbi);
911 vp8_decode_mode_mvs(pbi);
913 // reset since these guys are used as iterators
914 vpx_memset(pc->above_context[Y1CONTEXT], 0, sizeof(ENTROPY_CONTEXT) * pc->mb_cols * 4);
915 vpx_memset(pc->above_context[UCONTEXT ], 0, sizeof(ENTROPY_CONTEXT) * pc->mb_cols * 2);
916 vpx_memset(pc->above_context[VCONTEXT ], 0, sizeof(ENTROPY_CONTEXT) * pc->mb_cols * 2);
917 vpx_memset(pc->above_context[Y2CONTEXT], 0, sizeof(ENTROPY_CONTEXT) * pc->mb_cols);
919 xd->gf_active_ptr = (signed char *)pc->gf_active_flags; // Point to base of GF active flags data structure
922 vpx_memcpy(&xd->block[0].bmi, &xd->mode_info_context->bmi[0], sizeof(B_MODE_INFO));
925 if (pbi->b_multithreaded_lf && pbi->common.filter_level != 0)
926 vp8_start_lfthread(pbi);
928 if (pbi->b_multithreaded_rd && pbi->common.multi_token_partition != ONE_PARTITION)
930 vp8_mtdecode_mb_rows(pbi, xd);
935 int num_part = 1 << pbi->common.multi_token_partition;
937 // Decode the individual macro block
938 for (mb_row = 0; mb_row < pc->mb_rows; mb_row++)
943 xd->current_bc = & pbi->mbc[ibc];
950 vp8_decode_mb_row(pbi, pc, mb_row, xd);
953 pbi->last_mb_row_decoded = mb_row;
957 stop_token_decoder(pbi);
959 vp8dx_stop_decode(bc);
961 // vpx_log("Decoder: Frame Decoded, Size Roughly:%d bytes \n",bc->pos+pbi->bc2.pos);
963 // If this was a kf or Gf note the Q used
964 if ((pc->frame_type == KEY_FRAME) || (pc->refresh_golden_frame) || pbi->common.refresh_alt_ref_frame)
965 pc->last_kf_gf_q = pc->base_qindex;
967 if (pc->refresh_entropy_probs == 0)
969 vpx_memcpy(&pc->fc, &pc->lfc, sizeof(pc->fc));
972 #ifdef PACKET_TESTING
974 FILE *f = fopen("decompressor.VP8", "ab");
975 unsigned int size = pbi->bc2.pos + pbi->bc.pos + 8;
976 fwrite((void *) &size, 4, 1, f);
977 fwrite((void *) pbi->Source, size, 1, f);