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);
129 static void reconstruct_mb(VP8D_COMP *pbi, MACROBLOCKD *xd)
131 if (xd->frame_type == KEY_FRAME || xd->mbmi.ref_frame == INTRA_FRAME)
133 vp8_build_intra_predictors_mbuv(xd);
135 if (xd->mbmi.mode != B_PRED)
137 vp8_build_intra_predictors_mby_ptr(xd);
138 vp8_recon16x16mb(RTCD_VTABLE(recon), xd);
142 vp8_recon_intra4x4mb(RTCD_VTABLE(recon), xd);
147 vp8_build_inter_predictors_mb(xd);
148 vp8_recon16x16mb(RTCD_VTABLE(recon), xd);
153 static void de_quantand_idct(VP8D_COMP *pbi, MACROBLOCKD *xd)
156 BLOCKD *b = &xd->block[24];
159 if (xd->mbmi.mode != B_PRED && xd->mbmi.mode != SPLITMV)
161 DEQUANT_INVOKE(&pbi->dequant, block)(b);
163 // do 2nd order transform on the dc block
166 IDCT_INVOKE(RTCD_VTABLE(idct), iwalsh16)(&b->dqcoeff[0], b->diff);
167 ((int *)b->qcoeff)[0] = 0;
168 ((int *)b->qcoeff)[1] = 0;
169 ((int *)b->qcoeff)[2] = 0;
170 ((int *)b->qcoeff)[3] = 0;
171 ((int *)b->qcoeff)[4] = 0;
172 ((int *)b->qcoeff)[5] = 0;
173 ((int *)b->qcoeff)[6] = 0;
174 ((int *)b->qcoeff)[7] = 0;
178 IDCT_INVOKE(RTCD_VTABLE(idct), iwalsh1)(&b->dqcoeff[0], b->diff);
179 ((int *)b->qcoeff)[0] = 0;
183 for (i = 0; i < 16; i++)
190 DEQUANT_INVOKE(&pbi->dequant, idct_dc)(b->qcoeff, &b->dequant[0][0], b->diff, 32, xd->block[24].diff[i]);
194 IDCT_INVOKE(RTCD_VTABLE(idct), idct1_scalar)(xd->block[24].diff[i], b->diff, 32);
198 for (i = 16; i < 24; i++)
204 DEQUANT_INVOKE(&pbi->dequant, idct)(b->qcoeff, &b->dequant[0][0], b->diff, 16);
208 IDCT_INVOKE(RTCD_VTABLE(idct), idct1_scalar)(b->qcoeff[0] * b->dequant[0][0], b->diff, 16);
209 ((int *)b->qcoeff)[0] = 0;
215 for (i = 0; i < 24; i++)
222 DEQUANT_INVOKE(&pbi->dequant, idct)(b->qcoeff, &b->dequant[0][0], b->diff, (32 - (i & 16)));
226 IDCT_INVOKE(RTCD_VTABLE(idct), idct1_scalar)(b->qcoeff[0] * b->dequant[0][0], b->diff, (32 - (i & 16)));
227 ((int *)b->qcoeff)[0] = 0;
233 void vp8_decode_macroblock(VP8D_COMP *pbi, MACROBLOCKD *xd)
237 if (xd->mbmi.mb_skip_coeff)
239 vp8_reset_mb_tokens_context(xd);
243 eobtotal = vp8_decode_mb_tokens(pbi, xd);
246 xd->mode_info_context->mbmi.dc_diff = 1;
248 if (xd->mbmi.mode != B_PRED && xd->mbmi.mode != SPLITMV && eobtotal == 0)
250 xd->mode_info_context->mbmi.dc_diff = 0;
251 skip_recon_mb(pbi, xd);
255 if (xd->segmentation_enabled)
256 mb_init_dequantizer(pbi, xd);
258 de_quantand_idct(pbi, xd);
259 reconstruct_mb(pbi, xd);
262 static int get_delta_q(vp8_reader *bc, int prev, int *q_update)
266 if (vp8_read_bit(bc))
268 ret_val = vp8_read_literal(bc, 4);
270 if (vp8_read_bit(bc))
274 /* Trigger a quantizer update if the delta-q value has changed */
281 #ifdef PACKET_TESTING
288 void vp8_decode_mb_row(VP8D_COMP *pbi,
295 int recon_yoffset, recon_uvoffset;
297 int recon_y_stride = pc->last_frame.y_stride;
298 int recon_uv_stride = pc->last_frame.uv_stride;
300 vpx_memset(pc->left_context, 0, sizeof(pc->left_context));
301 recon_yoffset = mb_row * recon_y_stride * 16;
302 recon_uvoffset = mb_row * recon_uv_stride * 8;
303 // reset above block coeffs
305 xd->above_context[Y1CONTEXT] = pc->above_context[Y1CONTEXT];
306 xd->above_context[UCONTEXT ] = pc->above_context[UCONTEXT];
307 xd->above_context[VCONTEXT ] = pc->above_context[VCONTEXT];
308 xd->above_context[Y2CONTEXT] = pc->above_context[Y2CONTEXT];
309 xd->up_available = (mb_row != 0);
311 xd->mb_to_top_edge = -((mb_row * 16)) << 3;
312 xd->mb_to_bottom_edge = ((pc->mb_rows - 1 - mb_row) * 16) << 3;
314 for (mb_col = 0; mb_col < pc->mb_cols; mb_col++)
316 // Take a copy of the mode and Mv information for this macroblock into the xd->mbmi
317 vpx_memcpy(&xd->mbmi, &xd->mode_info_context->mbmi, 32); //sizeof(MB_MODE_INFO) );
319 if (xd->mbmi.mode == SPLITMV || xd->mbmi.mode == B_PRED)
321 for (i = 0; i < 16; i++)
323 BLOCKD *d = &xd->block[i];
324 vpx_memcpy(&d->bmi, &xd->mode_info_context->bmi[i], sizeof(B_MODE_INFO));
328 // Distance of Mb to the various image edges.
329 // These specified to 8th pel as they are always compared to values that are in 1/8th pel units
330 xd->mb_to_left_edge = -((mb_col * 16) << 3);
331 xd->mb_to_right_edge = ((pc->mb_cols - 1 - mb_col) * 16) << 3;
333 xd->dst.y_buffer = pc->new_frame.y_buffer + recon_yoffset;
334 xd->dst.u_buffer = pc->new_frame.u_buffer + recon_uvoffset;
335 xd->dst.v_buffer = pc->new_frame.v_buffer + recon_uvoffset;
337 xd->left_available = (mb_col != 0);
339 // Select the appropriate reference frame for this MB
340 if (xd->mbmi.ref_frame == LAST_FRAME)
342 xd->pre.y_buffer = pc->last_frame.y_buffer + recon_yoffset;
343 xd->pre.u_buffer = pc->last_frame.u_buffer + recon_uvoffset;
344 xd->pre.v_buffer = pc->last_frame.v_buffer + recon_uvoffset;
346 else if (xd->mbmi.ref_frame == GOLDEN_FRAME)
348 // Golden frame reconstruction buffer
349 xd->pre.y_buffer = pc->golden_frame.y_buffer + recon_yoffset;
350 xd->pre.u_buffer = pc->golden_frame.u_buffer + recon_uvoffset;
351 xd->pre.v_buffer = pc->golden_frame.v_buffer + recon_uvoffset;
355 // Alternate reference frame reconstruction buffer
356 xd->pre.y_buffer = pc->alt_ref_frame.y_buffer + recon_yoffset;
357 xd->pre.u_buffer = pc->alt_ref_frame.u_buffer + recon_uvoffset;
358 xd->pre.v_buffer = pc->alt_ref_frame.v_buffer + recon_uvoffset;
361 vp8_build_uvmvs(xd, pc->full_pixel);
364 if(pbi->common.current_video_frame==0 &&mb_col==1 && mb_row==0)
369 vp8dx_bool_decoder_fill(xd->current_bc);
370 vp8_decode_macroblock(pbi, xd);
376 ++xd->mode_info_context; /* next mb */
378 xd->gf_active_ptr++; // GF useage flag for next MB
380 xd->above_context[Y1CONTEXT] += 4;
381 xd->above_context[UCONTEXT ] += 2;
382 xd->above_context[VCONTEXT ] += 2;
383 xd->above_context[Y2CONTEXT] ++;
385 pbi->current_mb_col_main = mb_col;
388 // adjust to the next row of mbs
391 xd->dst.y_buffer + 16, xd->dst.u_buffer + 8, xd->dst.v_buffer + 8
394 ++xd->mode_info_context; /* skip prediction column */
396 pbi->last_mb_row_decoded = mb_row;
400 static unsigned int read_partition_size(const unsigned char *cx_size)
402 const unsigned int size =
403 cx_size[0] + (cx_size[1] << 8) + (cx_size[2] << 16);
408 static void setup_token_decoder(VP8D_COMP *pbi,
409 const unsigned char *cx_data)
413 VP8_COMMON *pc = &pbi->common;
414 const unsigned char *user_data_end = pbi->Source + pbi->source_sz;
415 vp8_reader *bool_decoder;
416 const unsigned char *partition;
418 /* Parse number of token partitions to use */
419 pc->multi_token_partition = (TOKEN_PARTITION)vp8_read_literal(&pbi->bc, 2);
420 num_part = 1 << pc->multi_token_partition;
422 /* Set up pointers to the first partition */
424 bool_decoder = &pbi->bc2;
428 CHECK_MEM_ERROR(pbi->mbc, vpx_malloc(num_part * sizeof(vp8_reader)));
429 bool_decoder = pbi->mbc;
430 partition += 3 * (num_part - 1);
433 for (i = 0; i < num_part; i++)
435 const unsigned char *partition_size_ptr = cx_data + i * 3;
436 unsigned int partition_size;
438 /* Calculate the length of this partition. The last partition
441 if (i < num_part - 1)
443 partition_size = read_partition_size(partition_size_ptr);
447 partition_size = user_data_end - partition;
450 if (partition + partition_size > user_data_end)
451 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
452 "Truncated packet or corrupt partition "
455 if (vp8dx_start_decode(bool_decoder, IF_RTCD(&pbi->dboolhuff),
456 partition, partition_size))
457 vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR,
458 "Failed to allocate bool decoder %d", i + 1);
460 /* Advance to the next partition */
461 partition += partition_size;
465 /* Clamp number of decoder threads */
466 if (pbi->decoding_thread_count > num_part - 1)
467 pbi->decoding_thread_count = num_part - 1;
471 static void stop_token_decoder(VP8D_COMP *pbi)
474 VP8_COMMON *pc = &pbi->common;
476 if (pc->multi_token_partition != ONE_PARTITION)
478 int num_part = (1 << pc->multi_token_partition);
480 for (i = 0; i < num_part; i++)
482 vp8dx_stop_decode(&pbi->mbc[i]);
488 vp8dx_stop_decode(& pbi->bc2);
491 static void init_frame(VP8D_COMP *pbi)
493 VP8_COMMON *const pc = & pbi->common;
494 MACROBLOCKD *const xd = & pbi->mb;
496 if (pc->frame_type == KEY_FRAME)
498 // Various keyframe initializations
499 vpx_memcpy(pc->fc.mvc, vp8_default_mv_context, sizeof(vp8_default_mv_context));
501 vp8_init_mbmode_probs(pc);
503 vp8_default_coef_probs(pc);
504 vp8_kf_default_bmode_probs(pc->kf_bmode_prob);
506 // reset the segment feature data to 0 with delta coding (Default state).
507 vpx_memset(xd->segment_feature_data, 0, sizeof(xd->segment_feature_data));
508 xd->mb_segement_abs_delta = SEGMENT_DELTADATA;
510 // reset the mode ref deltasa for loop filter
511 vpx_memset(xd->ref_lf_deltas, 0, sizeof(xd->ref_lf_deltas));
512 vpx_memset(xd->mode_lf_deltas, 0, sizeof(xd->mode_lf_deltas));
514 // All buffers are implicitly updated on key frames.
515 pc->refresh_golden_frame = 1;
516 pc->refresh_alt_ref_frame = 1;
517 pc->copy_buffer_to_gf = 0;
518 pc->copy_buffer_to_arf = 0;
520 // Note that Golden and Altref modes cannot be used on a key frame so
521 // ref_frame_sign_bias[] is undefined and meaningless
522 pc->ref_frame_sign_bias[GOLDEN_FRAME] = 0;
523 pc->ref_frame_sign_bias[ALTREF_FRAME] = 0;
527 if (!pc->use_bilinear_mc_filter)
528 pc->mcomp_filter_type = SIXTAP;
530 pc->mcomp_filter_type = BILINEAR;
532 // To enable choice of different interploation filters
533 if (pc->mcomp_filter_type == SIXTAP)
535 xd->subpixel_predict = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap4x4);
536 xd->subpixel_predict8x4 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap8x4);
537 xd->subpixel_predict8x8 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap8x8);
538 xd->subpixel_predict16x16 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap16x16);
542 xd->subpixel_predict = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear4x4);
543 xd->subpixel_predict8x4 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear8x4);
544 xd->subpixel_predict8x8 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear8x8);
545 xd->subpixel_predict16x16 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear16x16);
549 xd->left_context = pc->left_context;
550 xd->mode_info_context = pc->mi;
551 xd->frame_type = pc->frame_type;
552 xd->mbmi.mode = DC_PRED;
553 xd->mode_info_stride = pc->mode_info_stride;
556 int vp8_decode_frame(VP8D_COMP *pbi)
558 vp8_reader *const bc = & pbi->bc;
559 VP8_COMMON *const pc = & pbi->common;
560 MACROBLOCKD *const xd = & pbi->mb;
561 const unsigned char *data = (const unsigned char *)pbi->Source;
562 const unsigned char *const data_end = data + pbi->source_sz;
563 int first_partition_length_in_bytes;
567 const int *const mb_feature_data_bits = vp8_mb_feature_data_bits;
569 pc->frame_type = (FRAME_TYPE)(data[0] & 1);
570 pc->version = (data[0] >> 1) & 7;
571 pc->show_frame = (data[0] >> 4) & 1;
572 first_partition_length_in_bytes =
573 (data[0] | (data[1] << 8) | (data[2] << 16)) >> 5;
576 if (data + first_partition_length_in_bytes > data_end)
577 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
578 "Truncated packet or corrupt partition 0 length");
579 vp8_setup_version(pc);
581 if (pc->frame_type == KEY_FRAME)
583 const int Width = pc->Width;
584 const int Height = pc->Height;
587 if (data[0] != 0x9d || data[1] != 0x01 || data[2] != 0x2a)
588 vpx_internal_error(&pc->error, VPX_CODEC_UNSUP_BITSTREAM,
589 "Invalid frame sync code");
591 pc->Width = (data[3] | (data[4] << 8)) & 0x3fff;
592 pc->horiz_scale = data[4] >> 6;
593 pc->Height = (data[5] | (data[6] << 8)) & 0x3fff;
594 pc->vert_scale = data[6] >> 6;
597 if (Width != pc->Width || Height != pc->Height)
602 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
603 "Invalid frame width");
609 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
610 "Invalid frame height");
613 if (vp8_alloc_frame_buffers(&pbi->common, pc->Width, pc->Height))
614 vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR,
615 "Failed to allocate frame buffers");
619 if (pc->Width == 0 || pc->Height == 0)
626 if (vp8dx_start_decode(bc, IF_RTCD(&pbi->dboolhuff),
627 data, data_end - data))
628 vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR,
629 "Failed to allocate bool decoder 0");
630 if (pc->frame_type == KEY_FRAME) {
631 pc->clr_type = (YUV_TYPE)vp8_read_bit(bc);
632 pc->clamp_type = (CLAMP_TYPE)vp8_read_bit(bc);
635 // Is segmentation enabled
636 xd->segmentation_enabled = (unsigned char)vp8_read_bit(bc);
638 if (xd->segmentation_enabled)
640 // Signal whether or not the segmentation map is being explicitly updated this frame.
641 xd->update_mb_segmentation_map = (unsigned char)vp8_read_bit(bc);
642 xd->update_mb_segmentation_data = (unsigned char)vp8_read_bit(bc);
644 if (xd->update_mb_segmentation_data)
646 xd->mb_segement_abs_delta = (unsigned char)vp8_read_bit(bc);
648 vpx_memset(xd->segment_feature_data, 0, sizeof(xd->segment_feature_data));
650 // For each segmentation feature (Quant and loop filter level)
651 for (i = 0; i < MB_LVL_MAX; i++)
653 for (j = 0; j < MAX_MB_SEGMENTS; j++)
656 if (vp8_read_bit(bc))
658 xd->segment_feature_data[i][j] = (signed char)vp8_read_literal(bc, mb_feature_data_bits[i]);
660 if (vp8_read_bit(bc))
661 xd->segment_feature_data[i][j] = -xd->segment_feature_data[i][j];
664 xd->segment_feature_data[i][j] = 0;
669 if (xd->update_mb_segmentation_map)
671 // Which macro block level features are enabled
672 vpx_memset(xd->mb_segment_tree_probs, 255, sizeof(xd->mb_segment_tree_probs));
674 // Read the probs used to decode the segment id for each macro block.
675 for (i = 0; i < MB_FEATURE_TREE_PROBS; i++)
677 // If not explicitly set value is defaulted to 255 by memset above
678 if (vp8_read_bit(bc))
679 xd->mb_segment_tree_probs[i] = (vp8_prob)vp8_read_literal(bc, 8);
684 // Read the loop filter level and type
685 pc->filter_type = (LOOPFILTERTYPE) vp8_read_bit(bc);
686 pc->filter_level = vp8_read_literal(bc, 6);
687 pc->sharpness_level = vp8_read_literal(bc, 3);
689 // Read in loop filter deltas applied at the MB level based on mode or ref frame.
690 xd->mode_ref_lf_delta_update = 0;
691 xd->mode_ref_lf_delta_enabled = (unsigned char)vp8_read_bit(bc);
693 if (xd->mode_ref_lf_delta_enabled)
695 // Do the deltas need to be updated
696 xd->mode_ref_lf_delta_update = (unsigned char)vp8_read_bit(bc);
698 if (xd->mode_ref_lf_delta_update)
701 for (i = 0; i < MAX_REF_LF_DELTAS; i++)
703 if (vp8_read_bit(bc))
705 //sign = vp8_read_bit( bc );
706 xd->ref_lf_deltas[i] = (signed char)vp8_read_literal(bc, 6);
708 if (vp8_read_bit(bc)) // Apply sign
709 xd->ref_lf_deltas[i] = xd->ref_lf_deltas[i] * -1;
714 for (i = 0; i < MAX_MODE_LF_DELTAS; i++)
716 if (vp8_read_bit(bc))
718 //sign = vp8_read_bit( bc );
719 xd->mode_lf_deltas[i] = (signed char)vp8_read_literal(bc, 6);
721 if (vp8_read_bit(bc)) // Apply sign
722 xd->mode_lf_deltas[i] = xd->mode_lf_deltas[i] * -1;
728 setup_token_decoder(pbi, data + first_partition_length_in_bytes);
729 xd->current_bc = &pbi->bc2;
731 // Read the default quantizers.
735 Q = vp8_read_literal(bc, 7); // AC 1st order Q = default
738 pc->y1dc_delta_q = get_delta_q(bc, pc->y1dc_delta_q, &q_update);
739 pc->y2dc_delta_q = get_delta_q(bc, pc->y2dc_delta_q, &q_update);
740 pc->y2ac_delta_q = get_delta_q(bc, pc->y2ac_delta_q, &q_update);
741 pc->uvdc_delta_q = get_delta_q(bc, pc->uvdc_delta_q, &q_update);
742 pc->uvac_delta_q = get_delta_q(bc, pc->uvac_delta_q, &q_update);
745 vp8cx_init_de_quantizer(pbi);
747 // MB level dequantizer setup
748 mb_init_dequantizer(pbi, &pbi->mb);
751 // Determine if the golden frame or ARF buffer should be updated and how.
752 // For all non key frames the GF and ARF refresh flags and sign bias
753 // flags must be set explicitly.
754 if (pc->frame_type != KEY_FRAME)
756 // Should the GF or ARF be updated from the current frame
757 pc->refresh_golden_frame = vp8_read_bit(bc);
758 pc->refresh_alt_ref_frame = vp8_read_bit(bc);
760 // Buffer to buffer copy flags.
761 pc->copy_buffer_to_gf = 0;
763 if (!pc->refresh_golden_frame)
764 pc->copy_buffer_to_gf = vp8_read_literal(bc, 2);
766 pc->copy_buffer_to_arf = 0;
768 if (!pc->refresh_alt_ref_frame)
769 pc->copy_buffer_to_arf = vp8_read_literal(bc, 2);
771 pc->ref_frame_sign_bias[GOLDEN_FRAME] = vp8_read_bit(bc);
772 pc->ref_frame_sign_bias[ALTREF_FRAME] = vp8_read_bit(bc);
775 pc->refresh_entropy_probs = vp8_read_bit(bc);
776 if (pc->refresh_entropy_probs == 0)
778 vpx_memcpy(&pc->lfc, &pc->fc, sizeof(pc->fc));
781 pc->refresh_last_frame = pc->frame_type == KEY_FRAME || vp8_read_bit(bc);
785 FILE *z = fopen("decodestats.stt", "a");
786 fprintf(z, "%6d F:%d,G:%d,A:%d,L:%d,Q:%d\n",
787 pc->current_video_frame,
789 pc->refresh_golden_frame,
790 pc->refresh_alt_ref_frame,
791 pc->refresh_last_frame,
797 vp8dx_bool_decoder_fill(bc);
799 // read coef probability tree
801 for (i = 0; i < BLOCK_TYPES; i++)
802 for (j = 0; j < COEF_BANDS; j++)
803 for (k = 0; k < PREV_COEF_CONTEXTS; k++)
804 for (l = 0; l < MAX_ENTROPY_TOKENS - 1; l++)
807 vp8_prob *const p = pc->fc.coef_probs [i][j][k] + l;
809 if (vp8_read(bc, vp8_coef_update_probs [i][j][k][l]))
811 *p = (vp8_prob)vp8_read_literal(bc, 8);
817 vpx_memcpy(&xd->pre, &pc->last_frame, sizeof(YV12_BUFFER_CONFIG));
818 vpx_memcpy(&xd->dst, &pc->new_frame, sizeof(YV12_BUFFER_CONFIG));
820 // set up frame new frame for intra coded blocks
821 vp8_setup_intra_recon(&pc->new_frame);
823 vp8_setup_block_dptrs(xd);
825 vp8_build_block_doffsets(xd);
827 // clear out the coeff buffer
828 vpx_memset(xd->qcoeff, 0, sizeof(xd->qcoeff));
830 // Read the mb_no_coeff_skip flag
831 pc->mb_no_coeff_skip = (int)vp8_read_bit(bc);
833 if (pc->frame_type == KEY_FRAME)
834 vp8_kfread_modes(pbi);
836 vp8_decode_mode_mvs(pbi);
838 // reset since these guys are used as iterators
839 vpx_memset(pc->above_context[Y1CONTEXT], 0, sizeof(ENTROPY_CONTEXT) * pc->mb_cols * 4);
840 vpx_memset(pc->above_context[UCONTEXT ], 0, sizeof(ENTROPY_CONTEXT) * pc->mb_cols * 2);
841 vpx_memset(pc->above_context[VCONTEXT ], 0, sizeof(ENTROPY_CONTEXT) * pc->mb_cols * 2);
842 vpx_memset(pc->above_context[Y2CONTEXT], 0, sizeof(ENTROPY_CONTEXT) * pc->mb_cols);
844 xd->gf_active_ptr = (signed char *)pc->gf_active_flags; // Point to base of GF active flags data structure
847 vpx_memcpy(&xd->block[0].bmi, &xd->mode_info_context->bmi[0], sizeof(B_MODE_INFO));
850 if (pbi->b_multithreaded_lf && pbi->common.filter_level != 0)
851 vp8_start_lfthread(pbi);
853 if (pbi->b_multithreaded_rd && pbi->common.multi_token_partition != ONE_PARTITION)
855 vp8_mtdecode_mb_rows(pbi, xd);
860 int num_part = 1 << pbi->common.multi_token_partition;
862 // Decode the individual macro block
863 for (mb_row = 0; mb_row < pc->mb_rows; mb_row++)
868 xd->current_bc = & pbi->mbc[ibc];
875 vp8_decode_mb_row(pbi, pc, mb_row, xd);
878 pbi->last_mb_row_decoded = mb_row;
882 stop_token_decoder(pbi);
884 vp8dx_stop_decode(bc);
886 // vpx_log("Decoder: Frame Decoded, Size Roughly:%d bytes \n",bc->pos+pbi->bc2.pos);
888 // If this was a kf or Gf note the Q used
889 if ((pc->frame_type == KEY_FRAME) || (pc->refresh_golden_frame) || pbi->common.refresh_alt_ref_frame)
890 pc->last_kf_gf_q = pc->base_qindex;
892 if (pc->refresh_entropy_probs == 0)
894 vpx_memcpy(&pc->fc, &pc->lfc, sizeof(pc->fc));
897 #ifdef PACKET_TESTING
899 FILE *f = fopen("decompressor.VP8", "ab");
900 unsigned int size = pbi->bc2.pos + pbi->bc.pos + 8;
901 fwrite((void *) &size, 4, 1, f);
902 fwrite((void *) pbi->Source, size, 1, f);