2 * Copyright (c) 2010 The VP8 project authors. All Rights Reserved.
4 * Use of this source code is governed by a BSD-style license and patent
5 * grant that can be found in the LICENSE file in the root of the source
6 * tree. All contributing project authors may be found in the AUTHORS
7 * file in the root of the source tree.
11 #include "onyxd_int.h"
13 #include "reconintra.h"
14 #include "reconintra4x4.h"
16 #include "reconinter.h"
17 #include "dequantize.h"
18 #include "detokenize.h"
20 #include "alloccommon.h"
21 #include "entropymode.h"
22 #include "quant_common.h"
23 #include "segmentation_common.h"
24 #include "setupintrarecon.h"
28 #include "vpx_mem/vpx_mem.h"
30 #include "dequantize.h"
31 #include "predictdc.h"
32 #include "threading.h"
33 #include "decoderthreading.h"
34 #include "dboolhuff.h"
39 void vp8cx_init_de_quantizer(VP8D_COMP *pbi)
44 VP8_COMMON *const pc = & pbi->common;
46 for (Q = 0; Q < QINDEX_RANGE; Q++)
48 pc->Y1dequant[Q][0][0] = (short)vp8_dc_quant(Q, pc->y1dc_delta_q);
49 pc->Y2dequant[Q][0][0] = (short)vp8_dc2quant(Q, pc->y2dc_delta_q);
50 pc->UVdequant[Q][0][0] = (short)vp8_dc_uv_quant(Q, pc->uvdc_delta_q);
52 // all the ac values = ;
53 for (i = 1; i < 16; i++)
55 int rc = vp8_default_zig_zag1d[i];
59 pc->Y1dequant[Q][r][c] = (short)vp8_ac_yquant(Q);
60 pc->Y2dequant[Q][r][c] = (short)vp8_ac2quant(Q, pc->y2ac_delta_q);
61 pc->UVdequant[Q][r][c] = (short)vp8_ac_uv_quant(Q, pc->uvac_delta_q);
66 static void mb_init_dequantizer(VP8D_COMP *pbi, MACROBLOCKD *xd)
70 MB_MODE_INFO *mbmi = &xd->mode_info_context->mbmi;
71 VP8_COMMON *const pc = & pbi->common;
73 // Decide whether to use the default or alternate baseline Q value.
74 if (xd->segmentation_enabled)
77 if (xd->mb_segement_abs_delta == SEGMENT_ABSDATA)
78 QIndex = xd->segment_feature_data[MB_LVL_ALT_Q][mbmi->segment_id];
83 QIndex = pc->base_qindex + xd->segment_feature_data[MB_LVL_ALT_Q][mbmi->segment_id];
84 QIndex = (QIndex >= 0) ? ((QIndex <= MAXQ) ? QIndex : MAXQ) : 0; // Clamp to valid range
88 QIndex = pc->base_qindex;
90 // Set up the block level dequant pointers
91 for (i = 0; i < 16; i++)
93 xd->block[i].dequant = pc->Y1dequant[QIndex];
96 for (i = 16; i < 24; i++)
98 xd->block[i].dequant = pc->UVdequant[QIndex];
101 xd->block[24].dequant = pc->Y2dequant[QIndex];
105 #if CONFIG_RUNTIME_CPU_DETECT
106 #define RTCD_VTABLE(x) (&(pbi)->common.rtcd.x)
108 #define RTCD_VTABLE(x) NULL
111 //skip_recon_mb() is Modified: Instead of writing the result to predictor buffer and then copying it
112 // to dst buffer, we can write the result directly to dst buffer. This eliminates unnecessary copy.
113 static void skip_recon_mb(VP8D_COMP *pbi, MACROBLOCKD *xd)
115 if (xd->frame_type == KEY_FRAME || xd->mbmi.ref_frame == INTRA_FRAME)
118 vp8_build_intra_predictors_mbuv_s(xd);
119 vp8_build_intra_predictors_mby_s_ptr(xd);
124 vp8_build_inter_predictors_mb_s(xd);
128 static void reconstruct_mb(VP8D_COMP *pbi, MACROBLOCKD *xd)
130 if (xd->frame_type == KEY_FRAME || xd->mbmi.ref_frame == INTRA_FRAME)
132 vp8_build_intra_predictors_mbuv(xd);
134 if (xd->mbmi.mode != B_PRED)
136 vp8_build_intra_predictors_mby_ptr(xd);
137 vp8_recon16x16mb(RTCD_VTABLE(recon), xd);
141 vp8_recon_intra4x4mb(RTCD_VTABLE(recon), xd);
146 vp8_build_inter_predictors_mb(xd);
147 vp8_recon16x16mb(RTCD_VTABLE(recon), xd);
152 static void de_quantand_idct(VP8D_COMP *pbi, MACROBLOCKD *xd)
155 BLOCKD *b = &xd->block[24];
158 if (xd->mbmi.mode != B_PRED && xd->mbmi.mode != SPLITMV)
160 DEQUANT_INVOKE(&pbi->dequant, block)(b);
162 // do 2nd order transform on the dc block
165 IDCT_INVOKE(RTCD_VTABLE(idct), iwalsh16)(&b->dqcoeff[0], b->diff);
166 ((int *)b->qcoeff)[0] = 0;
167 ((int *)b->qcoeff)[1] = 0;
168 ((int *)b->qcoeff)[2] = 0;
169 ((int *)b->qcoeff)[3] = 0;
170 ((int *)b->qcoeff)[4] = 0;
171 ((int *)b->qcoeff)[5] = 0;
172 ((int *)b->qcoeff)[6] = 0;
173 ((int *)b->qcoeff)[7] = 0;
177 IDCT_INVOKE(RTCD_VTABLE(idct), iwalsh1)(&b->dqcoeff[0], b->diff);
178 ((int *)b->qcoeff)[0] = 0;
182 for (i = 0; i < 16; i++)
189 DEQUANT_INVOKE(&pbi->dequant, idct_dc)(b->qcoeff, &b->dequant[0][0], b->diff, 32, xd->block[24].diff[i]);
193 IDCT_INVOKE(RTCD_VTABLE(idct), idct1_scalar)(xd->block[24].diff[i], b->diff, 32);
197 for (i = 16; i < 24; i++)
203 DEQUANT_INVOKE(&pbi->dequant, idct)(b->qcoeff, &b->dequant[0][0], b->diff, 16);
207 IDCT_INVOKE(RTCD_VTABLE(idct), idct1_scalar)(b->qcoeff[0] * b->dequant[0][0], b->diff, 16);
208 ((int *)b->qcoeff)[0] = 0;
214 for (i = 0; i < 24; i++)
221 DEQUANT_INVOKE(&pbi->dequant, idct)(b->qcoeff, &b->dequant[0][0], b->diff, (32 - (i & 16)));
225 IDCT_INVOKE(RTCD_VTABLE(idct), idct1_scalar)(b->qcoeff[0] * b->dequant[0][0], b->diff, (32 - (i & 16)));
226 ((int *)b->qcoeff)[0] = 0;
232 void vp8_decode_macroblock(VP8D_COMP *pbi, MACROBLOCKD *xd)
236 if (xd->mbmi.mb_skip_coeff)
238 vp8_reset_mb_tokens_context(xd);
242 eobtotal = vp8_decode_mb_tokens(pbi, xd);
245 xd->mode_info_context->mbmi.dc_diff = 1;
247 if (xd->mbmi.mode != B_PRED && xd->mbmi.mode != SPLITMV && eobtotal == 0)
249 xd->mode_info_context->mbmi.dc_diff = 0;
250 skip_recon_mb(pbi, xd);
254 if (xd->segmentation_enabled)
255 mb_init_dequantizer(pbi, xd);
257 de_quantand_idct(pbi, xd);
258 reconstruct_mb(pbi, xd);
261 static int get_delta_q(vp8_reader *bc, int prev, int *q_update)
265 if (vp8_read_bit(bc))
267 ret_val = vp8_read_literal(bc, 4);
269 if (vp8_read_bit(bc))
273 /* Trigger a quantizer update if the delta-q value has changed */
280 #ifdef PACKET_TESTING
287 void vp8_decode_mb_row(VP8D_COMP *pbi,
294 int recon_yoffset, recon_uvoffset;
296 int recon_y_stride = pc->last_frame.y_stride;
297 int recon_uv_stride = pc->last_frame.uv_stride;
299 vpx_memset(pc->left_context, 0, sizeof(pc->left_context));
300 recon_yoffset = mb_row * recon_y_stride * 16;
301 recon_uvoffset = mb_row * recon_uv_stride * 8;
302 // reset above block coeffs
304 xd->above_context[Y1CONTEXT] = pc->above_context[Y1CONTEXT];
305 xd->above_context[UCONTEXT ] = pc->above_context[UCONTEXT];
306 xd->above_context[VCONTEXT ] = pc->above_context[VCONTEXT];
307 xd->above_context[Y2CONTEXT] = pc->above_context[Y2CONTEXT];
308 xd->up_available = (mb_row != 0);
310 xd->mb_to_top_edge = -((mb_row * 16)) << 3;
311 xd->mb_to_bottom_edge = ((pc->mb_rows - 1 - mb_row) * 16) << 3;
313 for (mb_col = 0; mb_col < pc->mb_cols; mb_col++)
315 // Take a copy of the mode and Mv information for this macroblock into the xd->mbmi
316 vpx_memcpy(&xd->mbmi, &xd->mode_info_context->mbmi, 32); //sizeof(MB_MODE_INFO) );
318 if (xd->mbmi.mode == SPLITMV || xd->mbmi.mode == B_PRED)
320 for (i = 0; i < 16; i++)
322 BLOCKD *d = &xd->block[i];
323 vpx_memcpy(&d->bmi, &xd->mode_info_context->bmi[i], sizeof(B_MODE_INFO));
327 // Distance of Mb to the various image edges.
328 // These specified to 8th pel as they are always compared to values that are in 1/8th pel units
329 xd->mb_to_left_edge = -((mb_col * 16) << 3);
330 xd->mb_to_right_edge = ((pc->mb_cols - 1 - mb_col) * 16) << 3;
332 xd->dst.y_buffer = pc->new_frame.y_buffer + recon_yoffset;
333 xd->dst.u_buffer = pc->new_frame.u_buffer + recon_uvoffset;
334 xd->dst.v_buffer = pc->new_frame.v_buffer + recon_uvoffset;
336 xd->left_available = (mb_col != 0);
338 // Select the appropriate reference frame for this MB
339 if (xd->mbmi.ref_frame == LAST_FRAME)
341 xd->pre.y_buffer = pc->last_frame.y_buffer + recon_yoffset;
342 xd->pre.u_buffer = pc->last_frame.u_buffer + recon_uvoffset;
343 xd->pre.v_buffer = pc->last_frame.v_buffer + recon_uvoffset;
345 else if (xd->mbmi.ref_frame == GOLDEN_FRAME)
347 // Golden frame reconstruction buffer
348 xd->pre.y_buffer = pc->golden_frame.y_buffer + recon_yoffset;
349 xd->pre.u_buffer = pc->golden_frame.u_buffer + recon_uvoffset;
350 xd->pre.v_buffer = pc->golden_frame.v_buffer + recon_uvoffset;
354 // Alternate reference frame reconstruction buffer
355 xd->pre.y_buffer = pc->alt_ref_frame.y_buffer + recon_yoffset;
356 xd->pre.u_buffer = pc->alt_ref_frame.u_buffer + recon_uvoffset;
357 xd->pre.v_buffer = pc->alt_ref_frame.v_buffer + recon_uvoffset;
360 vp8_build_uvmvs(xd, pc->full_pixel);
363 if(pbi->common.current_video_frame==0 &&mb_col==1 && mb_row==0)
368 vp8dx_bool_decoder_fill(xd->current_bc);
369 vp8_decode_macroblock(pbi, xd);
375 ++xd->mode_info_context; /* next mb */
377 xd->gf_active_ptr++; // GF useage flag for next MB
379 xd->above_context[Y1CONTEXT] += 4;
380 xd->above_context[UCONTEXT ] += 2;
381 xd->above_context[VCONTEXT ] += 2;
382 xd->above_context[Y2CONTEXT] ++;
384 pbi->current_mb_col_main = mb_col;
387 // adjust to the next row of mbs
390 xd->dst.y_buffer + 16, xd->dst.u_buffer + 8, xd->dst.v_buffer + 8
393 ++xd->mode_info_context; /* skip prediction column */
395 pbi->last_mb_row_decoded = mb_row;
399 static unsigned int read_partition_size(const unsigned char *cx_size)
401 const unsigned int size =
402 cx_size[0] + (cx_size[1] << 8) + (cx_size[2] << 16);
407 static void setup_token_decoder(VP8D_COMP *pbi,
408 const unsigned char *cx_data)
412 VP8_COMMON *pc = &pbi->common;
413 const unsigned char *user_data_end = pbi->Source + pbi->source_sz;
414 vp8_reader *bool_decoder;
415 const unsigned char *partition;
417 /* Parse number of token partitions to use */
418 pc->multi_token_partition = (TOKEN_PARTITION)vp8_read_literal(&pbi->bc, 2);
419 num_part = 1 << pc->multi_token_partition;
421 /* Set up pointers to the first partition */
423 bool_decoder = &pbi->bc2;
427 CHECK_MEM_ERROR(pbi->mbc, vpx_malloc(num_part * sizeof(vp8_reader)));
428 bool_decoder = pbi->mbc;
429 partition += 3 * (num_part - 1);
432 for (i = 0; i < num_part; i++)
434 const unsigned char *partition_size_ptr = cx_data + i * 3;
435 unsigned int partition_size;
437 /* Calculate the length of this partition. The last partition
440 if (i < num_part - 1)
442 partition_size = read_partition_size(partition_size_ptr);
446 partition_size = user_data_end - partition;
449 if (partition + partition_size > user_data_end)
450 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
451 "Truncated packet or corrupt partition "
454 if (vp8dx_start_decode(bool_decoder, IF_RTCD(&pbi->dboolhuff),
455 partition, partition_size))
456 vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR,
457 "Failed to allocate bool decoder %d", i + 1);
459 /* Advance to the next partition */
460 partition += partition_size;
464 /* Clamp number of decoder threads */
465 if (pbi->decoding_thread_count > num_part - 1)
466 pbi->decoding_thread_count = num_part - 1;
470 static void stop_token_decoder(VP8D_COMP *pbi)
473 VP8_COMMON *pc = &pbi->common;
475 if (pc->multi_token_partition != ONE_PARTITION)
477 int num_part = (1 << pc->multi_token_partition);
479 for (i = 0; i < num_part; i++)
481 vp8dx_stop_decode(&pbi->mbc[i]);
487 vp8dx_stop_decode(& pbi->bc2);
490 static void init_frame(VP8D_COMP *pbi)
492 VP8_COMMON *const pc = & pbi->common;
493 MACROBLOCKD *const xd = & pbi->mb;
495 if (pc->frame_type == KEY_FRAME)
497 // Various keyframe initializations
498 vpx_memcpy(pc->fc.mvc, vp8_default_mv_context, sizeof(vp8_default_mv_context));
500 vp8_init_mbmode_probs(pc);
502 vp8_default_coef_probs(pc);
503 vp8_kf_default_bmode_probs(pc->kf_bmode_prob);
505 // reset the segment feature data to 0 with delta coding (Default state).
506 vpx_memset(xd->segment_feature_data, 0, sizeof(xd->segment_feature_data));
507 xd->mb_segement_abs_delta = SEGMENT_DELTADATA;
509 // reset the mode ref deltasa for loop filter
510 vpx_memset(xd->ref_lf_deltas, 0, sizeof(xd->ref_lf_deltas));
511 vpx_memset(xd->mode_lf_deltas, 0, sizeof(xd->mode_lf_deltas));
513 // All buffers are implicitly updated on key frames.
514 pc->refresh_golden_frame = 1;
515 pc->refresh_alt_ref_frame = 1;
516 pc->copy_buffer_to_gf = 0;
517 pc->copy_buffer_to_arf = 0;
519 // Note that Golden and Altref modes cannot be used on a key frame so
520 // ref_frame_sign_bias[] is undefined and meaningless
521 pc->ref_frame_sign_bias[GOLDEN_FRAME] = 0;
522 pc->ref_frame_sign_bias[ALTREF_FRAME] = 0;
526 if (!pc->use_bilinear_mc_filter)
527 pc->mcomp_filter_type = SIXTAP;
529 pc->mcomp_filter_type = BILINEAR;
531 // To enable choice of different interploation filters
532 if (pc->mcomp_filter_type == SIXTAP)
534 xd->subpixel_predict = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap4x4);
535 xd->subpixel_predict8x4 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap8x4);
536 xd->subpixel_predict8x8 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap8x8);
537 xd->subpixel_predict16x16 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap16x16);
541 xd->subpixel_predict = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear4x4);
542 xd->subpixel_predict8x4 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear8x4);
543 xd->subpixel_predict8x8 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear8x8);
544 xd->subpixel_predict16x16 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear16x16);
548 xd->left_context = pc->left_context;
549 xd->mode_info_context = pc->mi;
550 xd->frame_type = pc->frame_type;
551 xd->mbmi.mode = DC_PRED;
552 xd->mode_info_stride = pc->mode_info_stride;
555 int vp8_decode_frame(VP8D_COMP *pbi)
557 vp8_reader *const bc = & pbi->bc;
558 VP8_COMMON *const pc = & pbi->common;
559 MACROBLOCKD *const xd = & pbi->mb;
560 const unsigned char *data = (const unsigned char *)pbi->Source;
561 const unsigned char *const data_end = data + pbi->source_sz;
562 int first_partition_length_in_bytes;
566 const int *const mb_feature_data_bits = vp8_mb_feature_data_bits;
568 pc->frame_type = (FRAME_TYPE)(data[0] & 1);
569 pc->version = (data[0] >> 1) & 7;
570 pc->show_frame = (data[0] >> 4) & 1;
571 first_partition_length_in_bytes =
572 (data[0] | (data[1] << 8) | (data[2] << 16)) >> 5;
575 if (data + first_partition_length_in_bytes > data_end)
576 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
577 "Truncated packet or corrupt partition 0 length");
578 vp8_setup_version(pc);
580 if (pc->frame_type == KEY_FRAME)
582 const int Width = pc->Width;
583 const int Height = pc->Height;
586 if (data[0] != 0x9d || data[1] != 0x01 || data[2] != 0x2a)
587 vpx_internal_error(&pc->error, VPX_CODEC_UNSUP_BITSTREAM,
588 "Invalid frame sync code");
590 pc->Width = (data[3] | (data[4] << 8)) & 0x3fff;
591 pc->horiz_scale = data[4] >> 6;
592 pc->Height = (data[5] | (data[6] << 8)) & 0x3fff;
593 pc->vert_scale = data[6] >> 6;
596 if (Width != pc->Width || Height != pc->Height)
601 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
602 "Invalid frame width");
608 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
609 "Invalid frame height");
612 if (vp8_alloc_frame_buffers(&pbi->common, pc->Width, pc->Height))
613 vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR,
614 "Failed to allocate frame buffers");
618 if (pc->Width == 0 || pc->Height == 0)
625 if (vp8dx_start_decode(bc, IF_RTCD(&pbi->dboolhuff),
626 data, data_end - data))
627 vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR,
628 "Failed to allocate bool decoder 0");
629 if (pc->frame_type == KEY_FRAME) {
630 pc->clr_type = (YUV_TYPE)vp8_read_bit(bc);
631 pc->clamp_type = (CLAMP_TYPE)vp8_read_bit(bc);
634 // Is segmentation enabled
635 xd->segmentation_enabled = (unsigned char)vp8_read_bit(bc);
637 if (xd->segmentation_enabled)
639 // Signal whether or not the segmentation map is being explicitly updated this frame.
640 xd->update_mb_segmentation_map = (unsigned char)vp8_read_bit(bc);
641 xd->update_mb_segmentation_data = (unsigned char)vp8_read_bit(bc);
643 if (xd->update_mb_segmentation_data)
645 xd->mb_segement_abs_delta = (unsigned char)vp8_read_bit(bc);
647 vpx_memset(xd->segment_feature_data, 0, sizeof(xd->segment_feature_data));
649 // For each segmentation feature (Quant and loop filter level)
650 for (i = 0; i < MB_LVL_MAX; i++)
652 for (j = 0; j < MAX_MB_SEGMENTS; j++)
655 if (vp8_read_bit(bc))
657 xd->segment_feature_data[i][j] = (signed char)vp8_read_literal(bc, mb_feature_data_bits[i]);
659 if (vp8_read_bit(bc))
660 xd->segment_feature_data[i][j] = -xd->segment_feature_data[i][j];
663 xd->segment_feature_data[i][j] = 0;
668 if (xd->update_mb_segmentation_map)
670 // Which macro block level features are enabled
671 vpx_memset(xd->mb_segment_tree_probs, 255, sizeof(xd->mb_segment_tree_probs));
673 // Read the probs used to decode the segment id for each macro block.
674 for (i = 0; i < MB_FEATURE_TREE_PROBS; i++)
676 // If not explicitly set value is defaulted to 255 by memset above
677 if (vp8_read_bit(bc))
678 xd->mb_segment_tree_probs[i] = (vp8_prob)vp8_read_literal(bc, 8);
683 // Read the loop filter level and type
684 pc->filter_type = (LOOPFILTERTYPE) vp8_read_bit(bc);
685 pc->filter_level = vp8_read_literal(bc, 6);
686 pc->sharpness_level = vp8_read_literal(bc, 3);
688 // Read in loop filter deltas applied at the MB level based on mode or ref frame.
689 xd->mode_ref_lf_delta_update = 0;
690 xd->mode_ref_lf_delta_enabled = (unsigned char)vp8_read_bit(bc);
692 if (xd->mode_ref_lf_delta_enabled)
694 // Do the deltas need to be updated
695 xd->mode_ref_lf_delta_update = (unsigned char)vp8_read_bit(bc);
697 if (xd->mode_ref_lf_delta_update)
700 for (i = 0; i < MAX_REF_LF_DELTAS; i++)
702 if (vp8_read_bit(bc))
704 //sign = vp8_read_bit( bc );
705 xd->ref_lf_deltas[i] = (signed char)vp8_read_literal(bc, 6);
707 if (vp8_read_bit(bc)) // Apply sign
708 xd->ref_lf_deltas[i] = xd->ref_lf_deltas[i] * -1;
713 for (i = 0; i < MAX_MODE_LF_DELTAS; i++)
715 if (vp8_read_bit(bc))
717 //sign = vp8_read_bit( bc );
718 xd->mode_lf_deltas[i] = (signed char)vp8_read_literal(bc, 6);
720 if (vp8_read_bit(bc)) // Apply sign
721 xd->mode_lf_deltas[i] = xd->mode_lf_deltas[i] * -1;
727 setup_token_decoder(pbi, data + first_partition_length_in_bytes);
728 xd->current_bc = &pbi->bc2;
730 // Read the default quantizers.
734 Q = vp8_read_literal(bc, 7); // AC 1st order Q = default
737 pc->y1dc_delta_q = get_delta_q(bc, pc->y1dc_delta_q, &q_update);
738 pc->y2dc_delta_q = get_delta_q(bc, pc->y2dc_delta_q, &q_update);
739 pc->y2ac_delta_q = get_delta_q(bc, pc->y2ac_delta_q, &q_update);
740 pc->uvdc_delta_q = get_delta_q(bc, pc->uvdc_delta_q, &q_update);
741 pc->uvac_delta_q = get_delta_q(bc, pc->uvac_delta_q, &q_update);
744 vp8cx_init_de_quantizer(pbi);
746 // MB level dequantizer setup
747 mb_init_dequantizer(pbi, &pbi->mb);
750 // Determine if the golden frame or ARF buffer should be updated and how.
751 // For all non key frames the GF and ARF refresh flags and sign bias
752 // flags must be set explicitly.
753 if (pc->frame_type != KEY_FRAME)
755 // Should the GF or ARF be updated from the current frame
756 pc->refresh_golden_frame = vp8_read_bit(bc);
757 pc->refresh_alt_ref_frame = vp8_read_bit(bc);
759 // Buffer to buffer copy flags.
760 pc->copy_buffer_to_gf = 0;
762 if (!pc->refresh_golden_frame)
763 pc->copy_buffer_to_gf = vp8_read_literal(bc, 2);
765 pc->copy_buffer_to_arf = 0;
767 if (!pc->refresh_alt_ref_frame)
768 pc->copy_buffer_to_arf = vp8_read_literal(bc, 2);
770 pc->ref_frame_sign_bias[GOLDEN_FRAME] = vp8_read_bit(bc);
771 pc->ref_frame_sign_bias[ALTREF_FRAME] = vp8_read_bit(bc);
774 pc->refresh_entropy_probs = vp8_read_bit(bc);
775 if (pc->refresh_entropy_probs == 0)
777 vpx_memcpy(&pc->lfc, &pc->fc, sizeof(pc->fc));
780 pc->refresh_last_frame = pc->frame_type == KEY_FRAME || vp8_read_bit(bc);
784 FILE *z = fopen("decodestats.stt", "a");
785 fprintf(z, "%6d F:%d,G:%d,A:%d,L:%d,Q:%d\n",
786 pc->current_video_frame,
788 pc->refresh_golden_frame,
789 pc->refresh_alt_ref_frame,
790 pc->refresh_last_frame,
796 vp8dx_bool_decoder_fill(bc);
798 // read coef probability tree
800 for (i = 0; i < BLOCK_TYPES; i++)
801 for (j = 0; j < COEF_BANDS; j++)
802 for (k = 0; k < PREV_COEF_CONTEXTS; k++)
803 for (l = 0; l < MAX_ENTROPY_TOKENS - 1; l++)
806 vp8_prob *const p = pc->fc.coef_probs [i][j][k] + l;
808 if (vp8_read(bc, vp8_coef_update_probs [i][j][k][l]))
810 *p = (vp8_prob)vp8_read_literal(bc, 8);
816 vpx_memcpy(&xd->pre, &pc->last_frame, sizeof(YV12_BUFFER_CONFIG));
817 vpx_memcpy(&xd->dst, &pc->new_frame, sizeof(YV12_BUFFER_CONFIG));
819 // set up frame new frame for intra coded blocks
820 vp8_setup_intra_recon(&pc->new_frame);
822 vp8_setup_block_dptrs(xd);
824 vp8_build_block_doffsets(xd);
826 // clear out the coeff buffer
827 vpx_memset(xd->qcoeff, 0, sizeof(xd->qcoeff));
829 // Read the mb_no_coeff_skip flag
830 pc->mb_no_coeff_skip = (int)vp8_read_bit(bc);
832 if (pc->frame_type == KEY_FRAME)
833 vp8_kfread_modes(pbi);
835 vp8_decode_mode_mvs(pbi);
837 // reset since these guys are used as iterators
838 vpx_memset(pc->above_context[Y1CONTEXT], 0, sizeof(ENTROPY_CONTEXT) * pc->mb_cols * 4);
839 vpx_memset(pc->above_context[UCONTEXT ], 0, sizeof(ENTROPY_CONTEXT) * pc->mb_cols * 2);
840 vpx_memset(pc->above_context[VCONTEXT ], 0, sizeof(ENTROPY_CONTEXT) * pc->mb_cols * 2);
841 vpx_memset(pc->above_context[Y2CONTEXT], 0, sizeof(ENTROPY_CONTEXT) * pc->mb_cols);
843 xd->gf_active_ptr = (signed char *)pc->gf_active_flags; // Point to base of GF active flags data structure
846 vpx_memcpy(&xd->block[0].bmi, &xd->mode_info_context->bmi[0], sizeof(B_MODE_INFO));
849 if (pbi->b_multithreaded_lf && pbi->common.filter_level != 0)
850 vp8_start_lfthread(pbi);
852 if (pbi->b_multithreaded_rd && pbi->common.multi_token_partition != ONE_PARTITION)
854 vp8_mtdecode_mb_rows(pbi, xd);
859 int num_part = 1 << pbi->common.multi_token_partition;
861 // Decode the individual macro block
862 for (mb_row = 0; mb_row < pc->mb_rows; mb_row++)
867 xd->current_bc = & pbi->mbc[ibc];
874 vp8_decode_mb_row(pbi, pc, mb_row, xd);
877 pbi->last_mb_row_decoded = mb_row;
881 stop_token_decoder(pbi);
883 vp8dx_stop_decode(bc);
885 // vpx_log("Decoder: Frame Decoded, Size Roughly:%d bytes \n",bc->pos+pbi->bc2.pos);
887 // If this was a kf or Gf note the Q used
888 if ((pc->frame_type == KEY_FRAME) || (pc->refresh_golden_frame) || pbi->common.refresh_alt_ref_frame)
889 pc->last_kf_gf_q = pc->base_qindex;
891 if (pc->refresh_entropy_probs == 0)
893 vpx_memcpy(&pc->fc, &pc->lfc, sizeof(pc->fc));
896 #ifdef PACKET_TESTING
898 FILE *f = fopen("decompressor.VP8", "ab");
899 unsigned int size = pbi->bc2.pos + pbi->bc.pos + 8;
900 fwrite((void *) &size, 4, 1, f);
901 fwrite((void *) pbi->Source, size, 1, f);