1 /*
2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11
12 #include "vpx_config.h"
13 #include "vp8_rtcd.h"
14 #include "./vpx_scale_rtcd.h"
15 #include "onyxd_int.h"
16 #include "vp8/common/header.h"
17 #include "vp8/common/reconintra4x4.h"
18 #include "vp8/common/reconinter.h"
19 #include "detokenize.h"
20 #include "vp8/common/common.h"
21 #include "vp8/common/invtrans.h"
22 #include "vp8/common/alloccommon.h"
23 #include "vp8/common/entropymode.h"
24 #include "vp8/common/quant_common.h"
25 #include "vpx_scale/vpx_scale.h"
26 #include "vp8/common/setupintrarecon.h"
27
28 #include "decodemv.h"
29 #include "vp8/common/extend.h"
30 #if CONFIG_ERROR_CONCEALMENT
31 #include "error_concealment.h"
32 #endif
33 #include "vpx_mem/vpx_mem.h"
34 #include "vp8/common/threading.h"
35 #include "decoderthreading.h"
36 #include "dboolhuff.h"
37
38 #include <assert.h>
39 #include <stdio.h>
40
vp8cx_init_de_quantizer(VP8D_COMP * pbi)41 void vp8cx_init_de_quantizer(VP8D_COMP *pbi)
42 {
43 int Q;
44 VP8_COMMON *const pc = & pbi->common;
45
46 for (Q = 0; Q < QINDEX_RANGE; Q++)
47 {
48 pc->Y1dequant[Q][0] = (short)vp8_dc_quant(Q, pc->y1dc_delta_q);
49 pc->Y2dequant[Q][0] = (short)vp8_dc2quant(Q, pc->y2dc_delta_q);
50 pc->UVdequant[Q][0] = (short)vp8_dc_uv_quant(Q, pc->uvdc_delta_q);
51
52 pc->Y1dequant[Q][1] = (short)vp8_ac_yquant(Q);
53 pc->Y2dequant[Q][1] = (short)vp8_ac2quant(Q, pc->y2ac_delta_q);
54 pc->UVdequant[Q][1] = (short)vp8_ac_uv_quant(Q, pc->uvac_delta_q);
55 }
56 }
57
vp8_mb_init_dequantizer(VP8D_COMP * pbi,MACROBLOCKD * xd)58 void vp8_mb_init_dequantizer(VP8D_COMP *pbi, MACROBLOCKD *xd)
59 {
60 int i;
61 int QIndex;
62 MB_MODE_INFO *mbmi = &xd->mode_info_context->mbmi;
63 VP8_COMMON *const pc = & pbi->common;
64
65 /* Decide whether to use the default or alternate baseline Q value. */
66 if (xd->segmentation_enabled)
67 {
68 /* Abs Value */
69 if (xd->mb_segement_abs_delta == SEGMENT_ABSDATA)
70 QIndex = xd->segment_feature_data[MB_LVL_ALT_Q][mbmi->segment_id];
71
72 /* Delta Value */
73 else
74 {
75 QIndex = pc->base_qindex + xd->segment_feature_data[MB_LVL_ALT_Q][mbmi->segment_id];
76 QIndex = (QIndex >= 0) ? ((QIndex <= MAXQ) ? QIndex : MAXQ) : 0; /* Clamp to valid range */
77 }
78 }
79 else
80 QIndex = pc->base_qindex;
81
82 /* Set up the macroblock dequant constants */
83 xd->dequant_y1_dc[0] = 1;
84 xd->dequant_y1[0] = pc->Y1dequant[QIndex][0];
85 xd->dequant_y2[0] = pc->Y2dequant[QIndex][0];
86 xd->dequant_uv[0] = pc->UVdequant[QIndex][0];
87
88 for (i = 1; i < 16; i++)
89 {
90 xd->dequant_y1_dc[i] =
91 xd->dequant_y1[i] = pc->Y1dequant[QIndex][1];
92 xd->dequant_y2[i] = pc->Y2dequant[QIndex][1];
93 xd->dequant_uv[i] = pc->UVdequant[QIndex][1];
94 }
95 }
96
decode_macroblock(VP8D_COMP * pbi,MACROBLOCKD * xd,unsigned int mb_idx)97 static void decode_macroblock(VP8D_COMP *pbi, MACROBLOCKD *xd,
98 unsigned int mb_idx)
99 {
100 MB_PREDICTION_MODE mode;
101 int i;
102 #if CONFIG_ERROR_CONCEALMENT
103 int corruption_detected = 0;
104 #endif
105
106 if (xd->mode_info_context->mbmi.mb_skip_coeff)
107 {
108 vp8_reset_mb_tokens_context(xd);
109 }
110 else if (!vp8dx_bool_error(xd->current_bc))
111 {
112 int eobtotal;
113 eobtotal = vp8_decode_mb_tokens(pbi, xd);
114
115 /* Special case: Force the loopfilter to skip when eobtotal is zero */
116 xd->mode_info_context->mbmi.mb_skip_coeff = (eobtotal==0);
117 }
118
119 mode = xd->mode_info_context->mbmi.mode;
120
121 if (xd->segmentation_enabled)
122 vp8_mb_init_dequantizer(pbi, xd);
123
124
125 #if CONFIG_ERROR_CONCEALMENT
126
127 if(pbi->ec_active)
128 {
129 int throw_residual;
130 /* When we have independent partitions we can apply residual even
131 * though other partitions within the frame are corrupt.
132 */
133 throw_residual = (!pbi->independent_partitions &&
134 pbi->frame_corrupt_residual);
135 throw_residual = (throw_residual || vp8dx_bool_error(xd->current_bc));
136
137 if ((mb_idx >= pbi->mvs_corrupt_from_mb || throw_residual))
138 {
139 /* MB with corrupt residuals or corrupt mode/motion vectors.
140 * Better to use the predictor as reconstruction.
141 */
142 pbi->frame_corrupt_residual = 1;
143 vpx_memset(xd->qcoeff, 0, sizeof(xd->qcoeff));
144 vp8_conceal_corrupt_mb(xd);
145
146
147 corruption_detected = 1;
148
149 /* force idct to be skipped for B_PRED and use the
150 * prediction only for reconstruction
151 * */
152 vpx_memset(xd->eobs, 0, 25);
153 }
154 }
155 #endif
156
157 /* do prediction */
158 if (xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME)
159 {
160 vp8_build_intra_predictors_mbuv_s(xd,
161 xd->recon_above[1],
162 xd->recon_above[2],
163 xd->recon_left[1],
164 xd->recon_left[2],
165 xd->recon_left_stride[1],
166 xd->dst.u_buffer, xd->dst.v_buffer,
167 xd->dst.uv_stride);
168
169 if (mode != B_PRED)
170 {
171 vp8_build_intra_predictors_mby_s(xd,
172 xd->recon_above[0],
173 xd->recon_left[0],
174 xd->recon_left_stride[0],
175 xd->dst.y_buffer,
176 xd->dst.y_stride);
177 }
178 else
179 {
180 short *DQC = xd->dequant_y1;
181 int dst_stride = xd->dst.y_stride;
182
183 /* clear out residual eob info */
184 if(xd->mode_info_context->mbmi.mb_skip_coeff)
185 vpx_memset(xd->eobs, 0, 25);
186
187 intra_prediction_down_copy(xd, xd->recon_above[0] + 16);
188
189 for (i = 0; i < 16; i++)
190 {
191 BLOCKD *b = &xd->block[i];
192 unsigned char *dst = xd->dst.y_buffer + b->offset;
193 B_PREDICTION_MODE b_mode =
194 xd->mode_info_context->bmi[i].as_mode;
195 unsigned char *Above = dst - dst_stride;
196 unsigned char *yleft = dst - 1;
197 int left_stride = dst_stride;
198 unsigned char top_left = Above[-1];
199
200 vp8_intra4x4_predict(Above, yleft, left_stride, b_mode,
201 dst, dst_stride, top_left);
202
203 if (xd->eobs[i])
204 {
205 if (xd->eobs[i] > 1)
206 {
207 vp8_dequant_idct_add(b->qcoeff, DQC, dst, dst_stride);
208 }
209 else
210 {
211 vp8_dc_only_idct_add
212 (b->qcoeff[0] * DQC[0],
213 dst, dst_stride,
214 dst, dst_stride);
215 vpx_memset(b->qcoeff, 0, 2 * sizeof(b->qcoeff[0]));
216 }
217 }
218 }
219 }
220 }
221 else
222 {
223 vp8_build_inter_predictors_mb(xd);
224 }
225
226
227 #if CONFIG_ERROR_CONCEALMENT
228 if (corruption_detected)
229 {
230 return;
231 }
232 #endif
233
234 if(!xd->mode_info_context->mbmi.mb_skip_coeff)
235 {
236 /* dequantization and idct */
237 if (mode != B_PRED)
238 {
239 short *DQC = xd->dequant_y1;
240
241 if (mode != SPLITMV)
242 {
243 BLOCKD *b = &xd->block[24];
244
245 /* do 2nd order transform on the dc block */
246 if (xd->eobs[24] > 1)
247 {
248 vp8_dequantize_b(b, xd->dequant_y2);
249
250 vp8_short_inv_walsh4x4(&b->dqcoeff[0],
251 xd->qcoeff);
252 vpx_memset(b->qcoeff, 0, 16 * sizeof(b->qcoeff[0]));
253 }
254 else
255 {
256 b->dqcoeff[0] = b->qcoeff[0] * xd->dequant_y2[0];
257 vp8_short_inv_walsh4x4_1(&b->dqcoeff[0],
258 xd->qcoeff);
259 vpx_memset(b->qcoeff, 0, 2 * sizeof(b->qcoeff[0]));
260 }
261
262 /* override the dc dequant constant in order to preserve the
263 * dc components
264 */
265 DQC = xd->dequant_y1_dc;
266 }
267
268 vp8_dequant_idct_add_y_block
269 (xd->qcoeff, DQC,
270 xd->dst.y_buffer,
271 xd->dst.y_stride, xd->eobs);
272 }
273
274 vp8_dequant_idct_add_uv_block
275 (xd->qcoeff+16*16, xd->dequant_uv,
276 xd->dst.u_buffer, xd->dst.v_buffer,
277 xd->dst.uv_stride, xd->eobs+16);
278 }
279 }
280
get_delta_q(vp8_reader * bc,int prev,int * q_update)281 static int get_delta_q(vp8_reader *bc, int prev, int *q_update)
282 {
283 int ret_val = 0;
284
285 if (vp8_read_bit(bc))
286 {
287 ret_val = vp8_read_literal(bc, 4);
288
289 if (vp8_read_bit(bc))
290 ret_val = -ret_val;
291 }
292
293 /* Trigger a quantizer update if the delta-q value has changed */
294 if (ret_val != prev)
295 *q_update = 1;
296
297 return ret_val;
298 }
299
300 #ifdef PACKET_TESTING
301 #include <stdio.h>
302 FILE *vpxlog = 0;
303 #endif
304
yv12_extend_frame_top_c(YV12_BUFFER_CONFIG * ybf)305 static void yv12_extend_frame_top_c(YV12_BUFFER_CONFIG *ybf)
306 {
307 int i;
308 unsigned char *src_ptr1;
309 unsigned char *dest_ptr1;
310
311 unsigned int Border;
312 int plane_stride;
313
314 /***********/
315 /* Y Plane */
316 /***********/
317 Border = ybf->border;
318 plane_stride = ybf->y_stride;
319 src_ptr1 = ybf->y_buffer - Border;
320 dest_ptr1 = src_ptr1 - (Border * plane_stride);
321
322 for (i = 0; i < (int)Border; i++)
323 {
324 vpx_memcpy(dest_ptr1, src_ptr1, plane_stride);
325 dest_ptr1 += plane_stride;
326 }
327
328
329 /***********/
330 /* U Plane */
331 /***********/
332 plane_stride = ybf->uv_stride;
333 Border /= 2;
334 src_ptr1 = ybf->u_buffer - Border;
335 dest_ptr1 = src_ptr1 - (Border * plane_stride);
336
337 for (i = 0; i < (int)(Border); i++)
338 {
339 vpx_memcpy(dest_ptr1, src_ptr1, plane_stride);
340 dest_ptr1 += plane_stride;
341 }
342
343 /***********/
344 /* V Plane */
345 /***********/
346
347 src_ptr1 = ybf->v_buffer - Border;
348 dest_ptr1 = src_ptr1 - (Border * plane_stride);
349
350 for (i = 0; i < (int)(Border); i++)
351 {
352 vpx_memcpy(dest_ptr1, src_ptr1, plane_stride);
353 dest_ptr1 += plane_stride;
354 }
355 }
356
yv12_extend_frame_bottom_c(YV12_BUFFER_CONFIG * ybf)357 static void yv12_extend_frame_bottom_c(YV12_BUFFER_CONFIG *ybf)
358 {
359 int i;
360 unsigned char *src_ptr1, *src_ptr2;
361 unsigned char *dest_ptr2;
362
363 unsigned int Border;
364 int plane_stride;
365 int plane_height;
366
367 /***********/
368 /* Y Plane */
369 /***********/
370 Border = ybf->border;
371 plane_stride = ybf->y_stride;
372 plane_height = ybf->y_height;
373
374 src_ptr1 = ybf->y_buffer - Border;
375 src_ptr2 = src_ptr1 + (plane_height * plane_stride) - plane_stride;
376 dest_ptr2 = src_ptr2 + plane_stride;
377
378 for (i = 0; i < (int)Border; i++)
379 {
380 vpx_memcpy(dest_ptr2, src_ptr2, plane_stride);
381 dest_ptr2 += plane_stride;
382 }
383
384
385 /***********/
386 /* U Plane */
387 /***********/
388 plane_stride = ybf->uv_stride;
389 plane_height = ybf->uv_height;
390 Border /= 2;
391
392 src_ptr1 = ybf->u_buffer - Border;
393 src_ptr2 = src_ptr1 + (plane_height * plane_stride) - plane_stride;
394 dest_ptr2 = src_ptr2 + plane_stride;
395
396 for (i = 0; i < (int)(Border); i++)
397 {
398 vpx_memcpy(dest_ptr2, src_ptr2, plane_stride);
399 dest_ptr2 += plane_stride;
400 }
401
402 /***********/
403 /* V Plane */
404 /***********/
405
406 src_ptr1 = ybf->v_buffer - Border;
407 src_ptr2 = src_ptr1 + (plane_height * plane_stride) - plane_stride;
408 dest_ptr2 = src_ptr2 + plane_stride;
409
410 for (i = 0; i < (int)(Border); i++)
411 {
412 vpx_memcpy(dest_ptr2, src_ptr2, plane_stride);
413 dest_ptr2 += plane_stride;
414 }
415 }
416
yv12_extend_frame_left_right_c(YV12_BUFFER_CONFIG * ybf,unsigned char * y_src,unsigned char * u_src,unsigned char * v_src)417 static void yv12_extend_frame_left_right_c(YV12_BUFFER_CONFIG *ybf,
418 unsigned char *y_src,
419 unsigned char *u_src,
420 unsigned char *v_src)
421 {
422 int i;
423 unsigned char *src_ptr1, *src_ptr2;
424 unsigned char *dest_ptr1, *dest_ptr2;
425
426 unsigned int Border;
427 int plane_stride;
428 int plane_height;
429 int plane_width;
430
431 /***********/
432 /* Y Plane */
433 /***********/
434 Border = ybf->border;
435 plane_stride = ybf->y_stride;
436 plane_height = 16;
437 plane_width = ybf->y_width;
438
439 /* copy the left and right most columns out */
440 src_ptr1 = y_src;
441 src_ptr2 = src_ptr1 + plane_width - 1;
442 dest_ptr1 = src_ptr1 - Border;
443 dest_ptr2 = src_ptr2 + 1;
444
445 for (i = 0; i < plane_height; i++)
446 {
447 vpx_memset(dest_ptr1, src_ptr1[0], Border);
448 vpx_memset(dest_ptr2, src_ptr2[0], Border);
449 src_ptr1 += plane_stride;
450 src_ptr2 += plane_stride;
451 dest_ptr1 += plane_stride;
452 dest_ptr2 += plane_stride;
453 }
454
455 /***********/
456 /* U Plane */
457 /***********/
458 plane_stride = ybf->uv_stride;
459 plane_height = 8;
460 plane_width = ybf->uv_width;
461 Border /= 2;
462
463 /* copy the left and right most columns out */
464 src_ptr1 = u_src;
465 src_ptr2 = src_ptr1 + plane_width - 1;
466 dest_ptr1 = src_ptr1 - Border;
467 dest_ptr2 = src_ptr2 + 1;
468
469 for (i = 0; i < plane_height; i++)
470 {
471 vpx_memset(dest_ptr1, src_ptr1[0], Border);
472 vpx_memset(dest_ptr2, src_ptr2[0], Border);
473 src_ptr1 += plane_stride;
474 src_ptr2 += plane_stride;
475 dest_ptr1 += plane_stride;
476 dest_ptr2 += plane_stride;
477 }
478
479 /***********/
480 /* V Plane */
481 /***********/
482
483 /* copy the left and right most columns out */
484 src_ptr1 = v_src;
485 src_ptr2 = src_ptr1 + plane_width - 1;
486 dest_ptr1 = src_ptr1 - Border;
487 dest_ptr2 = src_ptr2 + 1;
488
489 for (i = 0; i < plane_height; i++)
490 {
491 vpx_memset(dest_ptr1, src_ptr1[0], Border);
492 vpx_memset(dest_ptr2, src_ptr2[0], Border);
493 src_ptr1 += plane_stride;
494 src_ptr2 += plane_stride;
495 dest_ptr1 += plane_stride;
496 dest_ptr2 += plane_stride;
497 }
498 }
499
decode_mb_rows(VP8D_COMP * pbi)500 static void decode_mb_rows(VP8D_COMP *pbi)
501 {
502 VP8_COMMON *const pc = & pbi->common;
503 MACROBLOCKD *const xd = & pbi->mb;
504
505 MODE_INFO *lf_mic = xd->mode_info_context;
506
507 int ibc = 0;
508 int num_part = 1 << pc->multi_token_partition;
509
510 int recon_yoffset, recon_uvoffset;
511 int mb_row, mb_col;
512 int mb_idx = 0;
513
514 YV12_BUFFER_CONFIG *yv12_fb_new = pbi->dec_fb_ref[INTRA_FRAME];
515
516 int recon_y_stride = yv12_fb_new->y_stride;
517 int recon_uv_stride = yv12_fb_new->uv_stride;
518
519 unsigned char *ref_buffer[MAX_REF_FRAMES][3];
520 unsigned char *dst_buffer[3];
521 unsigned char *lf_dst[3];
522 unsigned char *eb_dst[3];
523 int i;
524 int ref_fb_corrupted[MAX_REF_FRAMES];
525
526 ref_fb_corrupted[INTRA_FRAME] = 0;
527
528 for(i = 1; i < MAX_REF_FRAMES; i++)
529 {
530 YV12_BUFFER_CONFIG *this_fb = pbi->dec_fb_ref[i];
531
532 ref_buffer[i][0] = this_fb->y_buffer;
533 ref_buffer[i][1] = this_fb->u_buffer;
534 ref_buffer[i][2] = this_fb->v_buffer;
535
536 ref_fb_corrupted[i] = this_fb->corrupted;
537 }
538
539 /* Set up the buffer pointers */
540 eb_dst[0] = lf_dst[0] = dst_buffer[0] = yv12_fb_new->y_buffer;
541 eb_dst[1] = lf_dst[1] = dst_buffer[1] = yv12_fb_new->u_buffer;
542 eb_dst[2] = lf_dst[2] = dst_buffer[2] = yv12_fb_new->v_buffer;
543
544 xd->up_available = 0;
545
546 /* Initialize the loop filter for this frame. */
547 if(pc->filter_level)
548 vp8_loop_filter_frame_init(pc, xd, pc->filter_level);
549
550 vp8_setup_intra_recon_top_line(yv12_fb_new);
551
552 /* Decode the individual macro block */
553 for (mb_row = 0; mb_row < pc->mb_rows; mb_row++)
554 {
555 if (num_part > 1)
556 {
557 xd->current_bc = & pbi->mbc[ibc];
558 ibc++;
559
560 if (ibc == num_part)
561 ibc = 0;
562 }
563
564 recon_yoffset = mb_row * recon_y_stride * 16;
565 recon_uvoffset = mb_row * recon_uv_stride * 8;
566
567 /* reset contexts */
568 xd->above_context = pc->above_context;
569 vpx_memset(xd->left_context, 0, sizeof(ENTROPY_CONTEXT_PLANES));
570
571 xd->left_available = 0;
572
573 xd->mb_to_top_edge = -((mb_row * 16) << 3);
574 xd->mb_to_bottom_edge = ((pc->mb_rows - 1 - mb_row) * 16) << 3;
575
576 xd->recon_above[0] = dst_buffer[0] + recon_yoffset;
577 xd->recon_above[1] = dst_buffer[1] + recon_uvoffset;
578 xd->recon_above[2] = dst_buffer[2] + recon_uvoffset;
579
580 xd->recon_left[0] = xd->recon_above[0] - 1;
581 xd->recon_left[1] = xd->recon_above[1] - 1;
582 xd->recon_left[2] = xd->recon_above[2] - 1;
583
584 xd->recon_above[0] -= xd->dst.y_stride;
585 xd->recon_above[1] -= xd->dst.uv_stride;
586 xd->recon_above[2] -= xd->dst.uv_stride;
587
588 /* TODO: move to outside row loop */
589 xd->recon_left_stride[0] = xd->dst.y_stride;
590 xd->recon_left_stride[1] = xd->dst.uv_stride;
591
592 setup_intra_recon_left(xd->recon_left[0], xd->recon_left[1],
593 xd->recon_left[2], xd->dst.y_stride,
594 xd->dst.uv_stride);
595
596 for (mb_col = 0; mb_col < pc->mb_cols; mb_col++)
597 {
598 /* Distance of Mb to the various image edges.
599 * These are specified to 8th pel as they are always compared to values
600 * that are in 1/8th pel units
601 */
602 xd->mb_to_left_edge = -((mb_col * 16) << 3);
603 xd->mb_to_right_edge = ((pc->mb_cols - 1 - mb_col) * 16) << 3;
604
605 #if CONFIG_ERROR_CONCEALMENT
606 {
607 int corrupt_residual = (!pbi->independent_partitions &&
608 pbi->frame_corrupt_residual) ||
609 vp8dx_bool_error(xd->current_bc);
610 if (pbi->ec_active &&
611 xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME &&
612 corrupt_residual)
613 {
614 /* We have an intra block with corrupt coefficients, better to
615 * conceal with an inter block. Interpolate MVs from neighboring
616 * MBs.
617 *
618 * Note that for the first mb with corrupt residual in a frame,
619 * we might not discover that before decoding the residual. That
620 * happens after this check, and therefore no inter concealment
621 * will be done.
622 */
623 vp8_interpolate_motion(xd,
624 mb_row, mb_col,
625 pc->mb_rows, pc->mb_cols,
626 pc->mode_info_stride);
627 }
628 }
629 #endif
630
631 xd->dst.y_buffer = dst_buffer[0] + recon_yoffset;
632 xd->dst.u_buffer = dst_buffer[1] + recon_uvoffset;
633 xd->dst.v_buffer = dst_buffer[2] + recon_uvoffset;
634
635 if (xd->mode_info_context->mbmi.ref_frame >= LAST_FRAME) {
636 MV_REFERENCE_FRAME ref = xd->mode_info_context->mbmi.ref_frame;
637 xd->pre.y_buffer = ref_buffer[ref][0] + recon_yoffset;
638 xd->pre.u_buffer = ref_buffer[ref][1] + recon_uvoffset;
639 xd->pre.v_buffer = ref_buffer[ref][2] + recon_uvoffset;
640 } else {
641 // ref_frame is INTRA_FRAME, pre buffer should not be used.
642 xd->pre.y_buffer = 0;
643 xd->pre.u_buffer = 0;
644 xd->pre.v_buffer = 0;
645 }
646
647 /* propagate errors from reference frames */
648 xd->corrupted |= ref_fb_corrupted[xd->mode_info_context->mbmi.ref_frame];
649
650 decode_macroblock(pbi, xd, mb_idx);
651
652 mb_idx++;
653 xd->left_available = 1;
654
655 /* check if the boolean decoder has suffered an error */
656 xd->corrupted |= vp8dx_bool_error(xd->current_bc);
657
658 xd->recon_above[0] += 16;
659 xd->recon_above[1] += 8;
660 xd->recon_above[2] += 8;
661 xd->recon_left[0] += 16;
662 xd->recon_left[1] += 8;
663 xd->recon_left[2] += 8;
664
665 recon_yoffset += 16;
666 recon_uvoffset += 8;
667
668 ++xd->mode_info_context; /* next mb */
669
670 xd->above_context++;
671 }
672
673 /* adjust to the next row of mbs */
674 vp8_extend_mb_row(yv12_fb_new, xd->dst.y_buffer + 16,
675 xd->dst.u_buffer + 8, xd->dst.v_buffer + 8);
676
677 ++xd->mode_info_context; /* skip prediction column */
678 xd->up_available = 1;
679
680 if(pc->filter_level)
681 {
682 if(mb_row > 0)
683 {
684 if (pc->filter_type == NORMAL_LOOPFILTER)
685 vp8_loop_filter_row_normal(pc, lf_mic, mb_row-1,
686 recon_y_stride, recon_uv_stride,
687 lf_dst[0], lf_dst[1], lf_dst[2]);
688 else
689 vp8_loop_filter_row_simple(pc, lf_mic, mb_row-1,
690 recon_y_stride, recon_uv_stride,
691 lf_dst[0], lf_dst[1], lf_dst[2]);
692 if(mb_row > 1)
693 {
694 yv12_extend_frame_left_right_c(yv12_fb_new,
695 eb_dst[0],
696 eb_dst[1],
697 eb_dst[2]);
698
699 eb_dst[0] += recon_y_stride * 16;
700 eb_dst[1] += recon_uv_stride * 8;
701 eb_dst[2] += recon_uv_stride * 8;
702 }
703
704 lf_dst[0] += recon_y_stride * 16;
705 lf_dst[1] += recon_uv_stride * 8;
706 lf_dst[2] += recon_uv_stride * 8;
707 lf_mic += pc->mb_cols;
708 lf_mic++; /* Skip border mb */
709 }
710 }
711 else
712 {
713 if(mb_row > 0)
714 {
715 /**/
716 yv12_extend_frame_left_right_c(yv12_fb_new,
717 eb_dst[0],
718 eb_dst[1],
719 eb_dst[2]);
720 eb_dst[0] += recon_y_stride * 16;
721 eb_dst[1] += recon_uv_stride * 8;
722 eb_dst[2] += recon_uv_stride * 8;
723 }
724 }
725 }
726
727 if(pc->filter_level)
728 {
729 if (pc->filter_type == NORMAL_LOOPFILTER)
730 vp8_loop_filter_row_normal(pc, lf_mic, mb_row-1, recon_y_stride,
731 recon_uv_stride, lf_dst[0], lf_dst[1],
732 lf_dst[2]);
733 else
734 vp8_loop_filter_row_simple(pc, lf_mic, mb_row-1, recon_y_stride,
735 recon_uv_stride, lf_dst[0], lf_dst[1],
736 lf_dst[2]);
737
738 yv12_extend_frame_left_right_c(yv12_fb_new,
739 eb_dst[0],
740 eb_dst[1],
741 eb_dst[2]);
742 eb_dst[0] += recon_y_stride * 16;
743 eb_dst[1] += recon_uv_stride * 8;
744 eb_dst[2] += recon_uv_stride * 8;
745 }
746 yv12_extend_frame_left_right_c(yv12_fb_new,
747 eb_dst[0],
748 eb_dst[1],
749 eb_dst[2]);
750 yv12_extend_frame_top_c(yv12_fb_new);
751 yv12_extend_frame_bottom_c(yv12_fb_new);
752
753 }
754
read_partition_size(VP8D_COMP * pbi,const unsigned char * cx_size)755 static unsigned int read_partition_size(VP8D_COMP *pbi,
756 const unsigned char *cx_size)
757 {
758 unsigned char temp[3];
759 if (pbi->decrypt_cb)
760 {
761 pbi->decrypt_cb(pbi->decrypt_state, cx_size, temp, 3);
762 cx_size = temp;
763 }
764 return cx_size[0] + (cx_size[1] << 8) + (cx_size[2] << 16);
765 }
766
read_is_valid(const unsigned char * start,size_t len,const unsigned char * end)767 static int read_is_valid(const unsigned char *start,
768 size_t len,
769 const unsigned char *end)
770 {
771 return (start + len > start && start + len <= end);
772 }
773
read_available_partition_size(VP8D_COMP * pbi,const unsigned char * token_part_sizes,const unsigned char * fragment_start,const unsigned char * first_fragment_end,const unsigned char * fragment_end,int i,int num_part)774 static unsigned int read_available_partition_size(
775 VP8D_COMP *pbi,
776 const unsigned char *token_part_sizes,
777 const unsigned char *fragment_start,
778 const unsigned char *first_fragment_end,
779 const unsigned char *fragment_end,
780 int i,
781 int num_part)
782 {
783 VP8_COMMON* pc = &pbi->common;
784 const unsigned char *partition_size_ptr = token_part_sizes + i * 3;
785 unsigned int partition_size = 0;
786 ptrdiff_t bytes_left = fragment_end - fragment_start;
787 /* Calculate the length of this partition. The last partition
788 * size is implicit. If the partition size can't be read, then
789 * either use the remaining data in the buffer (for EC mode)
790 * or throw an error.
791 */
792 if (i < num_part - 1)
793 {
794 if (read_is_valid(partition_size_ptr, 3, first_fragment_end))
795 partition_size = read_partition_size(pbi, partition_size_ptr);
796 else if (pbi->ec_active)
797 partition_size = (unsigned int)bytes_left;
798 else
799 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
800 "Truncated partition size data");
801 }
802 else
803 partition_size = (unsigned int)bytes_left;
804
805 /* Validate the calculated partition length. If the buffer
806 * described by the partition can't be fully read, then restrict
807 * it to the portion that can be (for EC mode) or throw an error.
808 */
809 if (!read_is_valid(fragment_start, partition_size, fragment_end))
810 {
811 if (pbi->ec_active)
812 partition_size = (unsigned int)bytes_left;
813 else
814 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
815 "Truncated packet or corrupt partition "
816 "%d length", i + 1);
817 }
818 return partition_size;
819 }
820
821
setup_token_decoder(VP8D_COMP * pbi,const unsigned char * token_part_sizes)822 static void setup_token_decoder(VP8D_COMP *pbi,
823 const unsigned char* token_part_sizes)
824 {
825 vp8_reader *bool_decoder = &pbi->mbc[0];
826 unsigned int partition_idx;
827 unsigned int fragment_idx;
828 unsigned int num_token_partitions;
829 const unsigned char *first_fragment_end = pbi->fragments.ptrs[0] +
830 pbi->fragments.sizes[0];
831
832 TOKEN_PARTITION multi_token_partition =
833 (TOKEN_PARTITION)vp8_read_literal(&pbi->mbc[8], 2);
834 if (!vp8dx_bool_error(&pbi->mbc[8]))
835 pbi->common.multi_token_partition = multi_token_partition;
836 num_token_partitions = 1 << pbi->common.multi_token_partition;
837
838 /* Check for partitions within the fragments and unpack the fragments
839 * so that each fragment pointer points to its corresponding partition. */
840 for (fragment_idx = 0; fragment_idx < pbi->fragments.count; ++fragment_idx)
841 {
842 unsigned int fragment_size = pbi->fragments.sizes[fragment_idx];
843 const unsigned char *fragment_end = pbi->fragments.ptrs[fragment_idx] +
844 fragment_size;
845 /* Special case for handling the first partition since we have already
846 * read its size. */
847 if (fragment_idx == 0)
848 {
849 /* Size of first partition + token partition sizes element */
850 ptrdiff_t ext_first_part_size = token_part_sizes -
851 pbi->fragments.ptrs[0] + 3 * (num_token_partitions - 1);
852 fragment_size -= (unsigned int)ext_first_part_size;
853 if (fragment_size > 0)
854 {
855 pbi->fragments.sizes[0] = (unsigned int)ext_first_part_size;
856 /* The fragment contains an additional partition. Move to
857 * next. */
858 fragment_idx++;
859 pbi->fragments.ptrs[fragment_idx] = pbi->fragments.ptrs[0] +
860 pbi->fragments.sizes[0];
861 }
862 }
863 /* Split the chunk into partitions read from the bitstream */
864 while (fragment_size > 0)
865 {
866 ptrdiff_t partition_size = read_available_partition_size(
867 pbi,
868 token_part_sizes,
869 pbi->fragments.ptrs[fragment_idx],
870 first_fragment_end,
871 fragment_end,
872 fragment_idx - 1,
873 num_token_partitions);
874 pbi->fragments.sizes[fragment_idx] = (unsigned int)partition_size;
875 fragment_size -= (unsigned int)partition_size;
876 assert(fragment_idx <= num_token_partitions);
877 if (fragment_size > 0)
878 {
879 /* The fragment contains an additional partition.
880 * Move to next. */
881 fragment_idx++;
882 pbi->fragments.ptrs[fragment_idx] =
883 pbi->fragments.ptrs[fragment_idx - 1] + partition_size;
884 }
885 }
886 }
887
888 pbi->fragments.count = num_token_partitions + 1;
889
890 for (partition_idx = 1; partition_idx < pbi->fragments.count; ++partition_idx)
891 {
892 if (vp8dx_start_decode(bool_decoder,
893 pbi->fragments.ptrs[partition_idx],
894 pbi->fragments.sizes[partition_idx],
895 pbi->decrypt_cb, pbi->decrypt_state))
896 vpx_internal_error(&pbi->common.error, VPX_CODEC_MEM_ERROR,
897 "Failed to allocate bool decoder %d",
898 partition_idx);
899
900 bool_decoder++;
901 }
902
903 #if CONFIG_MULTITHREAD
904 /* Clamp number of decoder threads */
905 if (pbi->decoding_thread_count > num_token_partitions - 1)
906 pbi->decoding_thread_count = num_token_partitions - 1;
907 #endif
908 }
909
910
init_frame(VP8D_COMP * pbi)911 static void init_frame(VP8D_COMP *pbi)
912 {
913 VP8_COMMON *const pc = & pbi->common;
914 MACROBLOCKD *const xd = & pbi->mb;
915
916 if (pc->frame_type == KEY_FRAME)
917 {
918 /* Various keyframe initializations */
919 vpx_memcpy(pc->fc.mvc, vp8_default_mv_context, sizeof(vp8_default_mv_context));
920
921 vp8_init_mbmode_probs(pc);
922
923 vp8_default_coef_probs(pc);
924
925 /* reset the segment feature data to 0 with delta coding (Default state). */
926 vpx_memset(xd->segment_feature_data, 0, sizeof(xd->segment_feature_data));
927 xd->mb_segement_abs_delta = SEGMENT_DELTADATA;
928
929 /* reset the mode ref deltasa for loop filter */
930 vpx_memset(xd->ref_lf_deltas, 0, sizeof(xd->ref_lf_deltas));
931 vpx_memset(xd->mode_lf_deltas, 0, sizeof(xd->mode_lf_deltas));
932
933 /* All buffers are implicitly updated on key frames. */
934 pc->refresh_golden_frame = 1;
935 pc->refresh_alt_ref_frame = 1;
936 pc->copy_buffer_to_gf = 0;
937 pc->copy_buffer_to_arf = 0;
938
939 /* Note that Golden and Altref modes cannot be used on a key frame so
940 * ref_frame_sign_bias[] is undefined and meaningless
941 */
942 pc->ref_frame_sign_bias[GOLDEN_FRAME] = 0;
943 pc->ref_frame_sign_bias[ALTREF_FRAME] = 0;
944 }
945 else
946 {
947 /* To enable choice of different interploation filters */
948 if (!pc->use_bilinear_mc_filter)
949 {
950 xd->subpixel_predict = vp8_sixtap_predict4x4;
951 xd->subpixel_predict8x4 = vp8_sixtap_predict8x4;
952 xd->subpixel_predict8x8 = vp8_sixtap_predict8x8;
953 xd->subpixel_predict16x16 = vp8_sixtap_predict16x16;
954 }
955 else
956 {
957 xd->subpixel_predict = vp8_bilinear_predict4x4;
958 xd->subpixel_predict8x4 = vp8_bilinear_predict8x4;
959 xd->subpixel_predict8x8 = vp8_bilinear_predict8x8;
960 xd->subpixel_predict16x16 = vp8_bilinear_predict16x16;
961 }
962
963 if (pbi->decoded_key_frame && pbi->ec_enabled && !pbi->ec_active)
964 pbi->ec_active = 1;
965 }
966
967 xd->left_context = &pc->left_context;
968 xd->mode_info_context = pc->mi;
969 xd->frame_type = pc->frame_type;
970 xd->mode_info_context->mbmi.mode = DC_PRED;
971 xd->mode_info_stride = pc->mode_info_stride;
972 xd->corrupted = 0; /* init without corruption */
973
974 xd->fullpixel_mask = 0xffffffff;
975 if(pc->full_pixel)
976 xd->fullpixel_mask = 0xfffffff8;
977
978 }
979
vp8_decode_frame(VP8D_COMP * pbi)980 int vp8_decode_frame(VP8D_COMP *pbi)
981 {
982 vp8_reader *const bc = &pbi->mbc[8];
983 VP8_COMMON *const pc = &pbi->common;
984 MACROBLOCKD *const xd = &pbi->mb;
985 const unsigned char *data = pbi->fragments.ptrs[0];
986 const unsigned char *data_end = data + pbi->fragments.sizes[0];
987 ptrdiff_t first_partition_length_in_bytes;
988
989 int i, j, k, l;
990 const int *const mb_feature_data_bits = vp8_mb_feature_data_bits;
991 int corrupt_tokens = 0;
992 int prev_independent_partitions = pbi->independent_partitions;
993
994 YV12_BUFFER_CONFIG *yv12_fb_new = pbi->dec_fb_ref[INTRA_FRAME];
995
996 /* start with no corruption of current frame */
997 xd->corrupted = 0;
998 yv12_fb_new->corrupted = 0;
999
1000 if (data_end - data < 3)
1001 {
1002 if (!pbi->ec_active)
1003 {
1004 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
1005 "Truncated packet");
1006 }
1007
1008 /* Declare the missing frame as an inter frame since it will
1009 be handled as an inter frame when we have estimated its
1010 motion vectors. */
1011 pc->frame_type = INTER_FRAME;
1012 pc->version = 0;
1013 pc->show_frame = 1;
1014 first_partition_length_in_bytes = 0;
1015 }
1016 else
1017 {
1018 unsigned char clear_buffer[10];
1019 const unsigned char *clear = data;
1020 if (pbi->decrypt_cb)
1021 {
1022 int n = (int)MIN(sizeof(clear_buffer), data_end - data);
1023 pbi->decrypt_cb(pbi->decrypt_state, data, clear_buffer, n);
1024 clear = clear_buffer;
1025 }
1026
1027 pc->frame_type = (FRAME_TYPE)(clear[0] & 1);
1028 pc->version = (clear[0] >> 1) & 7;
1029 pc->show_frame = (clear[0] >> 4) & 1;
1030 first_partition_length_in_bytes =
1031 (clear[0] | (clear[1] << 8) | (clear[2] << 16)) >> 5;
1032
1033 if (!pbi->ec_active &&
1034 (data + first_partition_length_in_bytes > data_end
1035 || data + first_partition_length_in_bytes < data))
1036 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
1037 "Truncated packet or corrupt partition 0 length");
1038
1039 data += 3;
1040 clear += 3;
1041
1042 vp8_setup_version(pc);
1043
1044
1045 if (pc->frame_type == KEY_FRAME)
1046 {
1047 /* vet via sync code */
1048 /* When error concealment is enabled we should only check the sync
1049 * code if we have enough bits available
1050 */
1051 if (!pbi->ec_active || data + 3 < data_end)
1052 {
1053 if (clear[0] != 0x9d || clear[1] != 0x01 || clear[2] != 0x2a)
1054 vpx_internal_error(&pc->error, VPX_CODEC_UNSUP_BITSTREAM,
1055 "Invalid frame sync code");
1056 }
1057
1058 /* If error concealment is enabled we should only parse the new size
1059 * if we have enough data. Otherwise we will end up with the wrong
1060 * size.
1061 */
1062 if (!pbi->ec_active || data + 6 < data_end)
1063 {
1064 pc->Width = (clear[3] | (clear[4] << 8)) & 0x3fff;
1065 pc->horiz_scale = clear[4] >> 6;
1066 pc->Height = (clear[5] | (clear[6] << 8)) & 0x3fff;
1067 pc->vert_scale = clear[6] >> 6;
1068 }
1069 data += 7;
1070 clear += 7;
1071 }
1072 else
1073 {
1074 vpx_memcpy(&xd->pre, yv12_fb_new, sizeof(YV12_BUFFER_CONFIG));
1075 vpx_memcpy(&xd->dst, yv12_fb_new, sizeof(YV12_BUFFER_CONFIG));
1076 }
1077 }
1078 if ((!pbi->decoded_key_frame && pc->frame_type != KEY_FRAME))
1079 {
1080 return -1;
1081 }
1082
1083 init_frame(pbi);
1084
1085 if (vp8dx_start_decode(bc, data, (unsigned int)(data_end - data),
1086 pbi->decrypt_cb, pbi->decrypt_state))
1087 vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR,
1088 "Failed to allocate bool decoder 0");
1089 if (pc->frame_type == KEY_FRAME) {
1090 (void)vp8_read_bit(bc); // colorspace
1091 pc->clamp_type = (CLAMP_TYPE)vp8_read_bit(bc);
1092 }
1093
1094 /* Is segmentation enabled */
1095 xd->segmentation_enabled = (unsigned char)vp8_read_bit(bc);
1096
1097 if (xd->segmentation_enabled)
1098 {
1099 /* Signal whether or not the segmentation map is being explicitly updated this frame. */
1100 xd->update_mb_segmentation_map = (unsigned char)vp8_read_bit(bc);
1101 xd->update_mb_segmentation_data = (unsigned char)vp8_read_bit(bc);
1102
1103 if (xd->update_mb_segmentation_data)
1104 {
1105 xd->mb_segement_abs_delta = (unsigned char)vp8_read_bit(bc);
1106
1107 vpx_memset(xd->segment_feature_data, 0, sizeof(xd->segment_feature_data));
1108
1109 /* For each segmentation feature (Quant and loop filter level) */
1110 for (i = 0; i < MB_LVL_MAX; i++)
1111 {
1112 for (j = 0; j < MAX_MB_SEGMENTS; j++)
1113 {
1114 /* Frame level data */
1115 if (vp8_read_bit(bc))
1116 {
1117 xd->segment_feature_data[i][j] = (signed char)vp8_read_literal(bc, mb_feature_data_bits[i]);
1118
1119 if (vp8_read_bit(bc))
1120 xd->segment_feature_data[i][j] = -xd->segment_feature_data[i][j];
1121 }
1122 else
1123 xd->segment_feature_data[i][j] = 0;
1124 }
1125 }
1126 }
1127
1128 if (xd->update_mb_segmentation_map)
1129 {
1130 /* Which macro block level features are enabled */
1131 vpx_memset(xd->mb_segment_tree_probs, 255, sizeof(xd->mb_segment_tree_probs));
1132
1133 /* Read the probs used to decode the segment id for each macro block. */
1134 for (i = 0; i < MB_FEATURE_TREE_PROBS; i++)
1135 {
1136 /* If not explicitly set value is defaulted to 255 by memset above */
1137 if (vp8_read_bit(bc))
1138 xd->mb_segment_tree_probs[i] = (vp8_prob)vp8_read_literal(bc, 8);
1139 }
1140 }
1141 }
1142 else
1143 {
1144 /* No segmentation updates on this frame */
1145 xd->update_mb_segmentation_map = 0;
1146 xd->update_mb_segmentation_data = 0;
1147 }
1148
1149 /* Read the loop filter level and type */
1150 pc->filter_type = (LOOPFILTERTYPE) vp8_read_bit(bc);
1151 pc->filter_level = vp8_read_literal(bc, 6);
1152 pc->sharpness_level = vp8_read_literal(bc, 3);
1153
1154 /* Read in loop filter deltas applied at the MB level based on mode or ref frame. */
1155 xd->mode_ref_lf_delta_update = 0;
1156 xd->mode_ref_lf_delta_enabled = (unsigned char)vp8_read_bit(bc);
1157
1158 if (xd->mode_ref_lf_delta_enabled)
1159 {
1160 /* Do the deltas need to be updated */
1161 xd->mode_ref_lf_delta_update = (unsigned char)vp8_read_bit(bc);
1162
1163 if (xd->mode_ref_lf_delta_update)
1164 {
1165 /* Send update */
1166 for (i = 0; i < MAX_REF_LF_DELTAS; i++)
1167 {
1168 if (vp8_read_bit(bc))
1169 {
1170 /*sign = vp8_read_bit( bc );*/
1171 xd->ref_lf_deltas[i] = (signed char)vp8_read_literal(bc, 6);
1172
1173 if (vp8_read_bit(bc)) /* Apply sign */
1174 xd->ref_lf_deltas[i] = xd->ref_lf_deltas[i] * -1;
1175 }
1176 }
1177
1178 /* Send update */
1179 for (i = 0; i < MAX_MODE_LF_DELTAS; i++)
1180 {
1181 if (vp8_read_bit(bc))
1182 {
1183 /*sign = vp8_read_bit( bc );*/
1184 xd->mode_lf_deltas[i] = (signed char)vp8_read_literal(bc, 6);
1185
1186 if (vp8_read_bit(bc)) /* Apply sign */
1187 xd->mode_lf_deltas[i] = xd->mode_lf_deltas[i] * -1;
1188 }
1189 }
1190 }
1191 }
1192
1193 setup_token_decoder(pbi, data + first_partition_length_in_bytes);
1194
1195 xd->current_bc = &pbi->mbc[0];
1196
1197 /* Read the default quantizers. */
1198 {
1199 int Q, q_update;
1200
1201 Q = vp8_read_literal(bc, 7); /* AC 1st order Q = default */
1202 pc->base_qindex = Q;
1203 q_update = 0;
1204 pc->y1dc_delta_q = get_delta_q(bc, pc->y1dc_delta_q, &q_update);
1205 pc->y2dc_delta_q = get_delta_q(bc, pc->y2dc_delta_q, &q_update);
1206 pc->y2ac_delta_q = get_delta_q(bc, pc->y2ac_delta_q, &q_update);
1207 pc->uvdc_delta_q = get_delta_q(bc, pc->uvdc_delta_q, &q_update);
1208 pc->uvac_delta_q = get_delta_q(bc, pc->uvac_delta_q, &q_update);
1209
1210 if (q_update)
1211 vp8cx_init_de_quantizer(pbi);
1212
1213 /* MB level dequantizer setup */
1214 vp8_mb_init_dequantizer(pbi, &pbi->mb);
1215 }
1216
1217 /* Determine if the golden frame or ARF buffer should be updated and how.
1218 * For all non key frames the GF and ARF refresh flags and sign bias
1219 * flags must be set explicitly.
1220 */
1221 if (pc->frame_type != KEY_FRAME)
1222 {
1223 /* Should the GF or ARF be updated from the current frame */
1224 pc->refresh_golden_frame = vp8_read_bit(bc);
1225 #if CONFIG_ERROR_CONCEALMENT
1226 /* Assume we shouldn't refresh golden if the bit is missing */
1227 xd->corrupted |= vp8dx_bool_error(bc);
1228 if (pbi->ec_active && xd->corrupted)
1229 pc->refresh_golden_frame = 0;
1230 #endif
1231
1232 pc->refresh_alt_ref_frame = vp8_read_bit(bc);
1233 #if CONFIG_ERROR_CONCEALMENT
1234 /* Assume we shouldn't refresh altref if the bit is missing */
1235 xd->corrupted |= vp8dx_bool_error(bc);
1236 if (pbi->ec_active && xd->corrupted)
1237 pc->refresh_alt_ref_frame = 0;
1238 #endif
1239
1240 /* Buffer to buffer copy flags. */
1241 pc->copy_buffer_to_gf = 0;
1242
1243 if (!pc->refresh_golden_frame)
1244 pc->copy_buffer_to_gf = vp8_read_literal(bc, 2);
1245
1246 #if CONFIG_ERROR_CONCEALMENT
1247 /* Assume we shouldn't copy to the golden if the bit is missing */
1248 xd->corrupted |= vp8dx_bool_error(bc);
1249 if (pbi->ec_active && xd->corrupted)
1250 pc->copy_buffer_to_gf = 0;
1251 #endif
1252
1253 pc->copy_buffer_to_arf = 0;
1254
1255 if (!pc->refresh_alt_ref_frame)
1256 pc->copy_buffer_to_arf = vp8_read_literal(bc, 2);
1257
1258 #if CONFIG_ERROR_CONCEALMENT
1259 /* Assume we shouldn't copy to the alt-ref if the bit is missing */
1260 xd->corrupted |= vp8dx_bool_error(bc);
1261 if (pbi->ec_active && xd->corrupted)
1262 pc->copy_buffer_to_arf = 0;
1263 #endif
1264
1265
1266 pc->ref_frame_sign_bias[GOLDEN_FRAME] = vp8_read_bit(bc);
1267 pc->ref_frame_sign_bias[ALTREF_FRAME] = vp8_read_bit(bc);
1268 }
1269
1270 pc->refresh_entropy_probs = vp8_read_bit(bc);
1271 #if CONFIG_ERROR_CONCEALMENT
1272 /* Assume we shouldn't refresh the probabilities if the bit is
1273 * missing */
1274 xd->corrupted |= vp8dx_bool_error(bc);
1275 if (pbi->ec_active && xd->corrupted)
1276 pc->refresh_entropy_probs = 0;
1277 #endif
1278 if (pc->refresh_entropy_probs == 0)
1279 {
1280 vpx_memcpy(&pc->lfc, &pc->fc, sizeof(pc->fc));
1281 }
1282
1283 pc->refresh_last_frame = pc->frame_type == KEY_FRAME || vp8_read_bit(bc);
1284
1285 #if CONFIG_ERROR_CONCEALMENT
1286 /* Assume we should refresh the last frame if the bit is missing */
1287 xd->corrupted |= vp8dx_bool_error(bc);
1288 if (pbi->ec_active && xd->corrupted)
1289 pc->refresh_last_frame = 1;
1290 #endif
1291
1292 if (0)
1293 {
1294 FILE *z = fopen("decodestats.stt", "a");
1295 fprintf(z, "%6d F:%d,G:%d,A:%d,L:%d,Q:%d\n",
1296 pc->current_video_frame,
1297 pc->frame_type,
1298 pc->refresh_golden_frame,
1299 pc->refresh_alt_ref_frame,
1300 pc->refresh_last_frame,
1301 pc->base_qindex);
1302 fclose(z);
1303 }
1304
1305 {
1306 pbi->independent_partitions = 1;
1307
1308 /* read coef probability tree */
1309 for (i = 0; i < BLOCK_TYPES; i++)
1310 for (j = 0; j < COEF_BANDS; j++)
1311 for (k = 0; k < PREV_COEF_CONTEXTS; k++)
1312 for (l = 0; l < ENTROPY_NODES; l++)
1313 {
1314
1315 vp8_prob *const p = pc->fc.coef_probs [i][j][k] + l;
1316
1317 if (vp8_read(bc, vp8_coef_update_probs [i][j][k][l]))
1318 {
1319 *p = (vp8_prob)vp8_read_literal(bc, 8);
1320
1321 }
1322 if (k > 0 && *p != pc->fc.coef_probs[i][j][k-1][l])
1323 pbi->independent_partitions = 0;
1324
1325 }
1326 }
1327
1328 /* clear out the coeff buffer */
1329 vpx_memset(xd->qcoeff, 0, sizeof(xd->qcoeff));
1330
1331 vp8_decode_mode_mvs(pbi);
1332
1333 #if CONFIG_ERROR_CONCEALMENT
1334 if (pbi->ec_active &&
1335 pbi->mvs_corrupt_from_mb < (unsigned int)pc->mb_cols * pc->mb_rows)
1336 {
1337 /* Motion vectors are missing in this frame. We will try to estimate
1338 * them and then continue decoding the frame as usual */
1339 vp8_estimate_missing_mvs(pbi);
1340 }
1341 #endif
1342
1343 vpx_memset(pc->above_context, 0, sizeof(ENTROPY_CONTEXT_PLANES) * pc->mb_cols);
1344 pbi->frame_corrupt_residual = 0;
1345
1346 #if CONFIG_MULTITHREAD
1347 if (pbi->b_multithreaded_rd && pc->multi_token_partition != ONE_PARTITION)
1348 {
1349 unsigned int thread;
1350 vp8mt_decode_mb_rows(pbi, xd);
1351 vp8_yv12_extend_frame_borders(yv12_fb_new);
1352 for (thread = 0; thread < pbi->decoding_thread_count; ++thread)
1353 corrupt_tokens |= pbi->mb_row_di[thread].mbd.corrupted;
1354 }
1355 else
1356 #endif
1357 {
1358 decode_mb_rows(pbi);
1359 corrupt_tokens |= xd->corrupted;
1360 }
1361
1362 /* Collect information about decoder corruption. */
1363 /* 1. Check first boolean decoder for errors. */
1364 yv12_fb_new->corrupted = vp8dx_bool_error(bc);
1365 /* 2. Check the macroblock information */
1366 yv12_fb_new->corrupted |= corrupt_tokens;
1367
1368 if (!pbi->decoded_key_frame)
1369 {
1370 if (pc->frame_type == KEY_FRAME &&
1371 !yv12_fb_new->corrupted)
1372 pbi->decoded_key_frame = 1;
1373 else
1374 vpx_internal_error(&pbi->common.error, VPX_CODEC_CORRUPT_FRAME,
1375 "A stream must start with a complete key frame");
1376 }
1377
1378 /* vpx_log("Decoder: Frame Decoded, Size Roughly:%d bytes \n",bc->pos+pbi->bc2.pos); */
1379
1380 if (pc->refresh_entropy_probs == 0)
1381 {
1382 vpx_memcpy(&pc->fc, &pc->lfc, sizeof(pc->fc));
1383 pbi->independent_partitions = prev_independent_partitions;
1384 }
1385
1386 #ifdef PACKET_TESTING
1387 {
1388 FILE *f = fopen("decompressor.VP8", "ab");
1389 unsigned int size = pbi->bc2.pos + pbi->bc.pos + 8;
1390 fwrite((void *) &size, 4, 1, f);
1391 fwrite((void *) pbi->Source, size, 1, f);
1392 fclose(f);
1393 }
1394 #endif
1395
1396 return 0;
1397 }
1398