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 "onyxd_int.h"
13 #include "vp8/common/header.h"
14 #include "vp8/common/reconintra.h"
15 #include "vp8/common/reconintra4x4.h"
16 #include "vp8/common/recon.h"
17 #include "vp8/common/reconinter.h"
18 #include "dequantize.h"
19 #include "detokenize.h"
20 #include "vp8/common/invtrans.h"
21 #include "vp8/common/alloccommon.h"
22 #include "vp8/common/entropymode.h"
23 #include "vp8/common/quant_common.h"
24 #include "vpx_scale/vpxscale.h"
25 #include "vpx_scale/yv12extend.h"
26 #include "vp8/common/setupintrarecon.h"
27
28 #include "decodemv.h"
29 #include "vp8/common/extend.h"
30 #include "vpx_mem/vpx_mem.h"
31 #include "vp8/common/idct.h"
32 #include "dequantize.h"
33 #include "vp8/common/threading.h"
34 #include "decoderthreading.h"
35 #include "dboolhuff.h"
36
37 #include <assert.h>
38 #include <stdio.h>
39
vp8cx_init_de_quantizer(VP8D_COMP * pbi)40 void vp8cx_init_de_quantizer(VP8D_COMP *pbi)
41 {
42 int i;
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 /* all the ac values = ; */
53 for (i = 1; i < 16; i++)
54 {
55 int rc = vp8_default_zig_zag1d[i];
56
57 pc->Y1dequant[Q][rc] = (short)vp8_ac_yquant(Q);
58 pc->Y2dequant[Q][rc] = (short)vp8_ac2quant(Q, pc->y2ac_delta_q);
59 pc->UVdequant[Q][rc] = (short)vp8_ac_uv_quant(Q, pc->uvac_delta_q);
60 }
61 }
62 }
63
mb_init_dequantizer(VP8D_COMP * pbi,MACROBLOCKD * xd)64 void mb_init_dequantizer(VP8D_COMP *pbi, MACROBLOCKD *xd)
65 {
66 int i;
67 int QIndex;
68 MB_MODE_INFO *mbmi = &xd->mode_info_context->mbmi;
69 VP8_COMMON *const pc = & pbi->common;
70
71 /* Decide whether to use the default or alternate baseline Q value. */
72 if (xd->segmentation_enabled)
73 {
74 /* Abs Value */
75 if (xd->mb_segement_abs_delta == SEGMENT_ABSDATA)
76 QIndex = xd->segment_feature_data[MB_LVL_ALT_Q][mbmi->segment_id];
77
78 /* Delta Value */
79 else
80 {
81 QIndex = pc->base_qindex + xd->segment_feature_data[MB_LVL_ALT_Q][mbmi->segment_id];
82 QIndex = (QIndex >= 0) ? ((QIndex <= MAXQ) ? QIndex : MAXQ) : 0; /* Clamp to valid range */
83 }
84 }
85 else
86 QIndex = pc->base_qindex;
87
88 /* Set up the block level dequant pointers */
89 for (i = 0; i < 16; i++)
90 {
91 xd->block[i].dequant = pc->Y1dequant[QIndex];
92 }
93
94 for (i = 16; i < 24; i++)
95 {
96 xd->block[i].dequant = pc->UVdequant[QIndex];
97 }
98
99 xd->block[24].dequant = pc->Y2dequant[QIndex];
100
101 }
102
103 #if CONFIG_RUNTIME_CPU_DETECT
104 #define RTCD_VTABLE(x) (&(pbi)->common.rtcd.x)
105 #else
106 #define RTCD_VTABLE(x) NULL
107 #endif
108
109 /* skip_recon_mb() is Modified: Instead of writing the result to predictor buffer and then copying it
110 * to dst buffer, we can write the result directly to dst buffer. This eliminates unnecessary copy.
111 */
skip_recon_mb(VP8D_COMP * pbi,MACROBLOCKD * xd)112 static void skip_recon_mb(VP8D_COMP *pbi, MACROBLOCKD *xd)
113 {
114 if (xd->frame_type == KEY_FRAME || xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME)
115 {
116
117 vp8_build_intra_predictors_mbuv_s(xd);
118 RECON_INVOKE(&pbi->common.rtcd.recon,
119 build_intra_predictors_mby_s)(xd);
120 }
121 else
122 {
123 vp8_build_inter_predictors_mb_s(xd);
124 }
125 }
126
clamp_mv_to_umv_border(MV * mv,const MACROBLOCKD * xd)127 static void clamp_mv_to_umv_border(MV *mv, const MACROBLOCKD *xd)
128 {
129 /* If the MV points so far into the UMV border that no visible pixels
130 * are used for reconstruction, the subpel part of the MV can be
131 * discarded and the MV limited to 16 pixels with equivalent results.
132 *
133 * This limit kicks in at 19 pixels for the top and left edges, for
134 * the 16 pixels plus 3 taps right of the central pixel when subpel
135 * filtering. The bottom and right edges use 16 pixels plus 2 pixels
136 * left of the central pixel when filtering.
137 */
138 if (mv->col < (xd->mb_to_left_edge - (19 << 3)))
139 mv->col = xd->mb_to_left_edge - (16 << 3);
140 else if (mv->col > xd->mb_to_right_edge + (18 << 3))
141 mv->col = xd->mb_to_right_edge + (16 << 3);
142
143 if (mv->row < (xd->mb_to_top_edge - (19 << 3)))
144 mv->row = xd->mb_to_top_edge - (16 << 3);
145 else if (mv->row > xd->mb_to_bottom_edge + (18 << 3))
146 mv->row = xd->mb_to_bottom_edge + (16 << 3);
147 }
148
149 /* A version of the above function for chroma block MVs.*/
clamp_uvmv_to_umv_border(MV * mv,const MACROBLOCKD * xd)150 static void clamp_uvmv_to_umv_border(MV *mv, const MACROBLOCKD *xd)
151 {
152 mv->col = (2*mv->col < (xd->mb_to_left_edge - (19 << 3))) ? (xd->mb_to_left_edge - (16 << 3)) >> 1 : mv->col;
153 mv->col = (2*mv->col > xd->mb_to_right_edge + (18 << 3)) ? (xd->mb_to_right_edge + (16 << 3)) >> 1 : mv->col;
154
155 mv->row = (2*mv->row < (xd->mb_to_top_edge - (19 << 3))) ? (xd->mb_to_top_edge - (16 << 3)) >> 1 : mv->row;
156 mv->row = (2*mv->row > xd->mb_to_bottom_edge + (18 << 3)) ? (xd->mb_to_bottom_edge + (16 << 3)) >> 1 : mv->row;
157 }
158
clamp_mvs(MACROBLOCKD * xd)159 void clamp_mvs(MACROBLOCKD *xd)
160 {
161 if (xd->mode_info_context->mbmi.mode == SPLITMV)
162 {
163 int i;
164
165 for (i=0; i<16; i++)
166 clamp_mv_to_umv_border(&xd->block[i].bmi.mv.as_mv, xd);
167 for (i=16; i<24; i++)
168 clamp_uvmv_to_umv_border(&xd->block[i].bmi.mv.as_mv, xd);
169 }
170 else
171 {
172 clamp_mv_to_umv_border(&xd->mode_info_context->mbmi.mv.as_mv, xd);
173 clamp_uvmv_to_umv_border(&xd->block[16].bmi.mv.as_mv, xd);
174 }
175
176 }
177
decode_macroblock(VP8D_COMP * pbi,MACROBLOCKD * xd)178 static void decode_macroblock(VP8D_COMP *pbi, MACROBLOCKD *xd)
179 {
180 int eobtotal = 0;
181 int i, do_clamp = xd->mode_info_context->mbmi.need_to_clamp_mvs;
182
183 if (xd->mode_info_context->mbmi.mb_skip_coeff)
184 {
185 vp8_reset_mb_tokens_context(xd);
186 }
187 else
188 {
189 eobtotal = vp8_decode_mb_tokens(pbi, xd);
190 }
191
192 /* Perform temporary clamping of the MV to be used for prediction */
193 if (do_clamp)
194 {
195 clamp_mvs(xd);
196 }
197
198 xd->mode_info_context->mbmi.dc_diff = 1;
199
200 if (xd->mode_info_context->mbmi.mode != B_PRED && xd->mode_info_context->mbmi.mode != SPLITMV && eobtotal == 0)
201 {
202 xd->mode_info_context->mbmi.dc_diff = 0;
203 skip_recon_mb(pbi, xd);
204 return;
205 }
206
207 if (xd->segmentation_enabled)
208 mb_init_dequantizer(pbi, xd);
209
210 /* do prediction */
211 if (xd->frame_type == KEY_FRAME || xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME)
212 {
213 vp8_build_intra_predictors_mbuv(xd);
214
215 if (xd->mode_info_context->mbmi.mode != B_PRED)
216 {
217 RECON_INVOKE(&pbi->common.rtcd.recon,
218 build_intra_predictors_mby)(xd);
219 } else {
220 vp8_intra_prediction_down_copy(xd);
221 }
222 }
223 else
224 {
225 vp8_build_inter_predictors_mb(xd);
226 }
227
228 /* dequantization and idct */
229 if (xd->mode_info_context->mbmi.mode != B_PRED && xd->mode_info_context->mbmi.mode != SPLITMV)
230 {
231 BLOCKD *b = &xd->block[24];
232 DEQUANT_INVOKE(&pbi->dequant, block)(b);
233
234 /* do 2nd order transform on the dc block */
235 if (xd->eobs[24] > 1)
236 {
237 IDCT_INVOKE(RTCD_VTABLE(idct), iwalsh16)(&b->dqcoeff[0], b->diff);
238 ((int *)b->qcoeff)[0] = 0;
239 ((int *)b->qcoeff)[1] = 0;
240 ((int *)b->qcoeff)[2] = 0;
241 ((int *)b->qcoeff)[3] = 0;
242 ((int *)b->qcoeff)[4] = 0;
243 ((int *)b->qcoeff)[5] = 0;
244 ((int *)b->qcoeff)[6] = 0;
245 ((int *)b->qcoeff)[7] = 0;
246 }
247 else
248 {
249 IDCT_INVOKE(RTCD_VTABLE(idct), iwalsh1)(&b->dqcoeff[0], b->diff);
250 ((int *)b->qcoeff)[0] = 0;
251 }
252
253 DEQUANT_INVOKE (&pbi->dequant, dc_idct_add_y_block)
254 (xd->qcoeff, xd->block[0].dequant,
255 xd->predictor, xd->dst.y_buffer,
256 xd->dst.y_stride, xd->eobs, xd->block[24].diff);
257 }
258 else if ((xd->frame_type == KEY_FRAME || xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME) && xd->mode_info_context->mbmi.mode == B_PRED)
259 {
260 for (i = 0; i < 16; i++)
261 {
262
263 BLOCKD *b = &xd->block[i];
264 vp8_predict_intra4x4(b, b->bmi.mode, b->predictor);
265
266 if (xd->eobs[i] > 1)
267 {
268 DEQUANT_INVOKE(&pbi->dequant, idct_add)
269 (b->qcoeff, b->dequant, b->predictor,
270 *(b->base_dst) + b->dst, 16, b->dst_stride);
271 }
272 else
273 {
274 IDCT_INVOKE(RTCD_VTABLE(idct), idct1_scalar_add)
275 (b->qcoeff[0] * b->dequant[0], b->predictor,
276 *(b->base_dst) + b->dst, 16, b->dst_stride);
277 ((int *)b->qcoeff)[0] = 0;
278 }
279 }
280
281 }
282 else
283 {
284 DEQUANT_INVOKE (&pbi->dequant, idct_add_y_block)
285 (xd->qcoeff, xd->block[0].dequant,
286 xd->predictor, xd->dst.y_buffer,
287 xd->dst.y_stride, xd->eobs);
288 }
289
290 DEQUANT_INVOKE (&pbi->dequant, idct_add_uv_block)
291 (xd->qcoeff+16*16, xd->block[16].dequant,
292 xd->predictor+16*16, xd->dst.u_buffer, xd->dst.v_buffer,
293 xd->dst.uv_stride, xd->eobs+16);
294 }
295
296
get_delta_q(vp8_reader * bc,int prev,int * q_update)297 static int get_delta_q(vp8_reader *bc, int prev, int *q_update)
298 {
299 int ret_val = 0;
300
301 if (vp8_read_bit(bc))
302 {
303 ret_val = vp8_read_literal(bc, 4);
304
305 if (vp8_read_bit(bc))
306 ret_val = -ret_val;
307 }
308
309 /* Trigger a quantizer update if the delta-q value has changed */
310 if (ret_val != prev)
311 *q_update = 1;
312
313 return ret_val;
314 }
315
316 #ifdef PACKET_TESTING
317 #include <stdio.h>
318 FILE *vpxlog = 0;
319 #endif
320
321
322
323 static void
decode_mb_row(VP8D_COMP * pbi,VP8_COMMON * pc,int mb_row,MACROBLOCKD * xd)324 decode_mb_row(VP8D_COMP *pbi, VP8_COMMON *pc, int mb_row, MACROBLOCKD *xd)
325 {
326
327 int i;
328 int recon_yoffset, recon_uvoffset;
329 int mb_col;
330 int ref_fb_idx = pc->lst_fb_idx;
331 int dst_fb_idx = pc->new_fb_idx;
332 int recon_y_stride = pc->yv12_fb[ref_fb_idx].y_stride;
333 int recon_uv_stride = pc->yv12_fb[ref_fb_idx].uv_stride;
334
335 vpx_memset(&pc->left_context, 0, sizeof(pc->left_context));
336 recon_yoffset = mb_row * recon_y_stride * 16;
337 recon_uvoffset = mb_row * recon_uv_stride * 8;
338 /* reset above block coeffs */
339
340 xd->above_context = pc->above_context;
341 xd->up_available = (mb_row != 0);
342
343 xd->mb_to_top_edge = -((mb_row * 16)) << 3;
344 xd->mb_to_bottom_edge = ((pc->mb_rows - 1 - mb_row) * 16) << 3;
345
346 for (mb_col = 0; mb_col < pc->mb_cols; mb_col++)
347 {
348
349 if (xd->mode_info_context->mbmi.mode == SPLITMV || xd->mode_info_context->mbmi.mode == B_PRED)
350 {
351 for (i = 0; i < 16; i++)
352 {
353 BLOCKD *d = &xd->block[i];
354 vpx_memcpy(&d->bmi, &xd->mode_info_context->bmi[i], sizeof(B_MODE_INFO));
355 }
356 }
357
358 /* Distance of Mb to the various image edges.
359 * These are specified to 8th pel as they are always compared to values that are in 1/8th pel units
360 */
361 xd->mb_to_left_edge = -((mb_col * 16) << 3);
362 xd->mb_to_right_edge = ((pc->mb_cols - 1 - mb_col) * 16) << 3;
363
364 xd->dst.y_buffer = pc->yv12_fb[dst_fb_idx].y_buffer + recon_yoffset;
365 xd->dst.u_buffer = pc->yv12_fb[dst_fb_idx].u_buffer + recon_uvoffset;
366 xd->dst.v_buffer = pc->yv12_fb[dst_fb_idx].v_buffer + recon_uvoffset;
367
368 xd->left_available = (mb_col != 0);
369
370 /* Select the appropriate reference frame for this MB */
371 if (xd->mode_info_context->mbmi.ref_frame == LAST_FRAME)
372 ref_fb_idx = pc->lst_fb_idx;
373 else if (xd->mode_info_context->mbmi.ref_frame == GOLDEN_FRAME)
374 ref_fb_idx = pc->gld_fb_idx;
375 else
376 ref_fb_idx = pc->alt_fb_idx;
377
378 xd->pre.y_buffer = pc->yv12_fb[ref_fb_idx].y_buffer + recon_yoffset;
379 xd->pre.u_buffer = pc->yv12_fb[ref_fb_idx].u_buffer + recon_uvoffset;
380 xd->pre.v_buffer = pc->yv12_fb[ref_fb_idx].v_buffer + recon_uvoffset;
381
382 if (xd->mode_info_context->mbmi.ref_frame != INTRA_FRAME)
383 {
384 /* propagate errors from reference frames */
385 xd->corrupted |= pc->yv12_fb[ref_fb_idx].corrupted;
386 }
387
388 vp8_build_uvmvs(xd, pc->full_pixel);
389
390 /*
391 if(pc->current_video_frame==0 &&mb_col==1 && mb_row==0)
392 pbi->debugoutput =1;
393 else
394 pbi->debugoutput =0;
395 */
396 decode_macroblock(pbi, xd);
397
398 /* check if the boolean decoder has suffered an error */
399 xd->corrupted |= vp8dx_bool_error(xd->current_bc);
400
401 recon_yoffset += 16;
402 recon_uvoffset += 8;
403
404 ++xd->mode_info_context; /* next mb */
405
406 xd->above_context++;
407
408 }
409
410 /* adjust to the next row of mbs */
411 vp8_extend_mb_row(
412 &pc->yv12_fb[dst_fb_idx],
413 xd->dst.y_buffer + 16, xd->dst.u_buffer + 8, xd->dst.v_buffer + 8
414 );
415
416 ++xd->mode_info_context; /* skip prediction column */
417 }
418
419
read_partition_size(const unsigned char * cx_size)420 static unsigned int read_partition_size(const unsigned char *cx_size)
421 {
422 const unsigned int size =
423 cx_size[0] + (cx_size[1] << 8) + (cx_size[2] << 16);
424 return size;
425 }
426
427
setup_token_decoder(VP8D_COMP * pbi,const unsigned char * cx_data)428 static void setup_token_decoder(VP8D_COMP *pbi,
429 const unsigned char *cx_data)
430 {
431 int num_part;
432 int i;
433 VP8_COMMON *pc = &pbi->common;
434 const unsigned char *user_data_end = pbi->Source + pbi->source_sz;
435 vp8_reader *bool_decoder;
436 const unsigned char *partition;
437
438 /* Parse number of token partitions to use */
439 pc->multi_token_partition = (TOKEN_PARTITION)vp8_read_literal(&pbi->bc, 2);
440 num_part = 1 << pc->multi_token_partition;
441
442 /* Set up pointers to the first partition */
443 partition = cx_data;
444 bool_decoder = &pbi->bc2;
445
446 if (num_part > 1)
447 {
448 CHECK_MEM_ERROR(pbi->mbc, vpx_malloc(num_part * sizeof(vp8_reader)));
449 bool_decoder = pbi->mbc;
450 partition += 3 * (num_part - 1);
451 }
452
453 for (i = 0; i < num_part; i++)
454 {
455 const unsigned char *partition_size_ptr = cx_data + i * 3;
456 ptrdiff_t partition_size;
457
458 /* Calculate the length of this partition. The last partition
459 * size is implicit.
460 */
461 if (i < num_part - 1)
462 {
463 partition_size = read_partition_size(partition_size_ptr);
464 }
465 else
466 {
467 partition_size = user_data_end - partition;
468 }
469
470 if (partition + partition_size > user_data_end
471 || partition + partition_size < partition)
472 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
473 "Truncated packet or corrupt partition "
474 "%d length", i + 1);
475
476 if (vp8dx_start_decode(bool_decoder, partition, partition_size))
477 vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR,
478 "Failed to allocate bool decoder %d", i + 1);
479
480 /* Advance to the next partition */
481 partition += partition_size;
482 bool_decoder++;
483 }
484
485 #if CONFIG_MULTITHREAD
486 /* Clamp number of decoder threads */
487 if (pbi->decoding_thread_count > num_part - 1)
488 pbi->decoding_thread_count = num_part - 1;
489 #endif
490 }
491
492
stop_token_decoder(VP8D_COMP * pbi)493 static void stop_token_decoder(VP8D_COMP *pbi)
494 {
495 VP8_COMMON *pc = &pbi->common;
496
497 if (pc->multi_token_partition != ONE_PARTITION)
498 vpx_free(pbi->mbc);
499 }
500
init_frame(VP8D_COMP * pbi)501 static void init_frame(VP8D_COMP *pbi)
502 {
503 VP8_COMMON *const pc = & pbi->common;
504 MACROBLOCKD *const xd = & pbi->mb;
505
506 if (pc->frame_type == KEY_FRAME)
507 {
508 /* Various keyframe initializations */
509 vpx_memcpy(pc->fc.mvc, vp8_default_mv_context, sizeof(vp8_default_mv_context));
510
511 vp8_init_mbmode_probs(pc);
512
513 vp8_default_coef_probs(pc);
514 vp8_kf_default_bmode_probs(pc->kf_bmode_prob);
515
516 /* reset the segment feature data to 0 with delta coding (Default state). */
517 vpx_memset(xd->segment_feature_data, 0, sizeof(xd->segment_feature_data));
518 xd->mb_segement_abs_delta = SEGMENT_DELTADATA;
519
520 /* reset the mode ref deltasa for loop filter */
521 vpx_memset(xd->ref_lf_deltas, 0, sizeof(xd->ref_lf_deltas));
522 vpx_memset(xd->mode_lf_deltas, 0, sizeof(xd->mode_lf_deltas));
523
524 /* All buffers are implicitly updated on key frames. */
525 pc->refresh_golden_frame = 1;
526 pc->refresh_alt_ref_frame = 1;
527 pc->copy_buffer_to_gf = 0;
528 pc->copy_buffer_to_arf = 0;
529
530 /* Note that Golden and Altref modes cannot be used on a key frame so
531 * ref_frame_sign_bias[] is undefined and meaningless
532 */
533 pc->ref_frame_sign_bias[GOLDEN_FRAME] = 0;
534 pc->ref_frame_sign_bias[ALTREF_FRAME] = 0;
535 }
536 else
537 {
538 if (!pc->use_bilinear_mc_filter)
539 pc->mcomp_filter_type = SIXTAP;
540 else
541 pc->mcomp_filter_type = BILINEAR;
542
543 /* To enable choice of different interploation filters */
544 if (pc->mcomp_filter_type == SIXTAP)
545 {
546 xd->subpixel_predict = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap4x4);
547 xd->subpixel_predict8x4 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap8x4);
548 xd->subpixel_predict8x8 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap8x8);
549 xd->subpixel_predict16x16 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap16x16);
550 }
551 else
552 {
553 xd->subpixel_predict = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear4x4);
554 xd->subpixel_predict8x4 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear8x4);
555 xd->subpixel_predict8x8 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear8x8);
556 xd->subpixel_predict16x16 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear16x16);
557 }
558 }
559
560 xd->left_context = &pc->left_context;
561 xd->mode_info_context = pc->mi;
562 xd->frame_type = pc->frame_type;
563 xd->mode_info_context->mbmi.mode = DC_PRED;
564 xd->mode_info_stride = pc->mode_info_stride;
565 xd->corrupted = 0; /* init without corruption */
566 }
567
vp8_decode_frame(VP8D_COMP * pbi)568 int vp8_decode_frame(VP8D_COMP *pbi)
569 {
570 vp8_reader *const bc = & pbi->bc;
571 VP8_COMMON *const pc = & pbi->common;
572 MACROBLOCKD *const xd = & pbi->mb;
573 const unsigned char *data = (const unsigned char *)pbi->Source;
574 const unsigned char *const data_end = data + pbi->source_sz;
575 ptrdiff_t first_partition_length_in_bytes;
576
577 int mb_row;
578 int i, j, k, l;
579 const int *const mb_feature_data_bits = vp8_mb_feature_data_bits;
580
581 /* start with no corruption of current frame */
582 xd->corrupted = 0;
583 pc->yv12_fb[pc->new_fb_idx].corrupted = 0;
584
585 if (data_end - data < 3)
586 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
587 "Truncated packet");
588 pc->frame_type = (FRAME_TYPE)(data[0] & 1);
589 pc->version = (data[0] >> 1) & 7;
590 pc->show_frame = (data[0] >> 4) & 1;
591 first_partition_length_in_bytes =
592 (data[0] | (data[1] << 8) | (data[2] << 16)) >> 5;
593 data += 3;
594
595 if (data + first_partition_length_in_bytes > data_end
596 || data + first_partition_length_in_bytes < data)
597 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
598 "Truncated packet or corrupt partition 0 length");
599 vp8_setup_version(pc);
600
601 if (pc->frame_type == KEY_FRAME)
602 {
603 const int Width = pc->Width;
604 const int Height = pc->Height;
605
606 /* vet via sync code */
607 if (data[0] != 0x9d || data[1] != 0x01 || data[2] != 0x2a)
608 vpx_internal_error(&pc->error, VPX_CODEC_UNSUP_BITSTREAM,
609 "Invalid frame sync code");
610
611 pc->Width = (data[3] | (data[4] << 8)) & 0x3fff;
612 pc->horiz_scale = data[4] >> 6;
613 pc->Height = (data[5] | (data[6] << 8)) & 0x3fff;
614 pc->vert_scale = data[6] >> 6;
615 data += 7;
616
617 if (Width != pc->Width || Height != pc->Height)
618 {
619 int prev_mb_rows = pc->mb_rows;
620
621 if (pc->Width <= 0)
622 {
623 pc->Width = Width;
624 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
625 "Invalid frame width");
626 }
627
628 if (pc->Height <= 0)
629 {
630 pc->Height = Height;
631 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
632 "Invalid frame height");
633 }
634
635 if (vp8_alloc_frame_buffers(pc, pc->Width, pc->Height))
636 vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR,
637 "Failed to allocate frame buffers");
638
639 #if CONFIG_MULTITHREAD
640 if (pbi->b_multithreaded_rd)
641 vp8mt_alloc_temp_buffers(pbi, pc->Width, prev_mb_rows);
642 #endif
643 }
644 }
645
646 if (pc->Width == 0 || pc->Height == 0)
647 {
648 return -1;
649 }
650
651 init_frame(pbi);
652
653 if (vp8dx_start_decode(bc, data, data_end - data))
654 vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR,
655 "Failed to allocate bool decoder 0");
656 if (pc->frame_type == KEY_FRAME) {
657 pc->clr_type = (YUV_TYPE)vp8_read_bit(bc);
658 pc->clamp_type = (CLAMP_TYPE)vp8_read_bit(bc);
659 }
660
661 /* Is segmentation enabled */
662 xd->segmentation_enabled = (unsigned char)vp8_read_bit(bc);
663
664 if (xd->segmentation_enabled)
665 {
666 /* Signal whether or not the segmentation map is being explicitly updated this frame. */
667 xd->update_mb_segmentation_map = (unsigned char)vp8_read_bit(bc);
668 xd->update_mb_segmentation_data = (unsigned char)vp8_read_bit(bc);
669
670 if (xd->update_mb_segmentation_data)
671 {
672 xd->mb_segement_abs_delta = (unsigned char)vp8_read_bit(bc);
673
674 vpx_memset(xd->segment_feature_data, 0, sizeof(xd->segment_feature_data));
675
676 /* For each segmentation feature (Quant and loop filter level) */
677 for (i = 0; i < MB_LVL_MAX; i++)
678 {
679 for (j = 0; j < MAX_MB_SEGMENTS; j++)
680 {
681 /* Frame level data */
682 if (vp8_read_bit(bc))
683 {
684 xd->segment_feature_data[i][j] = (signed char)vp8_read_literal(bc, mb_feature_data_bits[i]);
685
686 if (vp8_read_bit(bc))
687 xd->segment_feature_data[i][j] = -xd->segment_feature_data[i][j];
688 }
689 else
690 xd->segment_feature_data[i][j] = 0;
691 }
692 }
693 }
694
695 if (xd->update_mb_segmentation_map)
696 {
697 /* Which macro block level features are enabled */
698 vpx_memset(xd->mb_segment_tree_probs, 255, sizeof(xd->mb_segment_tree_probs));
699
700 /* Read the probs used to decode the segment id for each macro block. */
701 for (i = 0; i < MB_FEATURE_TREE_PROBS; i++)
702 {
703 /* If not explicitly set value is defaulted to 255 by memset above */
704 if (vp8_read_bit(bc))
705 xd->mb_segment_tree_probs[i] = (vp8_prob)vp8_read_literal(bc, 8);
706 }
707 }
708 }
709
710 /* Read the loop filter level and type */
711 pc->filter_type = (LOOPFILTERTYPE) vp8_read_bit(bc);
712 pc->filter_level = vp8_read_literal(bc, 6);
713 pc->sharpness_level = vp8_read_literal(bc, 3);
714
715 /* Read in loop filter deltas applied at the MB level based on mode or ref frame. */
716 xd->mode_ref_lf_delta_update = 0;
717 xd->mode_ref_lf_delta_enabled = (unsigned char)vp8_read_bit(bc);
718
719 if (xd->mode_ref_lf_delta_enabled)
720 {
721 /* Do the deltas need to be updated */
722 xd->mode_ref_lf_delta_update = (unsigned char)vp8_read_bit(bc);
723
724 if (xd->mode_ref_lf_delta_update)
725 {
726 /* Send update */
727 for (i = 0; i < MAX_REF_LF_DELTAS; i++)
728 {
729 if (vp8_read_bit(bc))
730 {
731 /*sign = vp8_read_bit( bc );*/
732 xd->ref_lf_deltas[i] = (signed char)vp8_read_literal(bc, 6);
733
734 if (vp8_read_bit(bc)) /* Apply sign */
735 xd->ref_lf_deltas[i] = xd->ref_lf_deltas[i] * -1;
736 }
737 }
738
739 /* Send update */
740 for (i = 0; i < MAX_MODE_LF_DELTAS; i++)
741 {
742 if (vp8_read_bit(bc))
743 {
744 /*sign = vp8_read_bit( bc );*/
745 xd->mode_lf_deltas[i] = (signed char)vp8_read_literal(bc, 6);
746
747 if (vp8_read_bit(bc)) /* Apply sign */
748 xd->mode_lf_deltas[i] = xd->mode_lf_deltas[i] * -1;
749 }
750 }
751 }
752 }
753
754 setup_token_decoder(pbi, data + first_partition_length_in_bytes);
755 xd->current_bc = &pbi->bc2;
756
757 /* Read the default quantizers. */
758 {
759 int Q, q_update;
760
761 Q = vp8_read_literal(bc, 7); /* AC 1st order Q = default */
762 pc->base_qindex = Q;
763 q_update = 0;
764 pc->y1dc_delta_q = get_delta_q(bc, pc->y1dc_delta_q, &q_update);
765 pc->y2dc_delta_q = get_delta_q(bc, pc->y2dc_delta_q, &q_update);
766 pc->y2ac_delta_q = get_delta_q(bc, pc->y2ac_delta_q, &q_update);
767 pc->uvdc_delta_q = get_delta_q(bc, pc->uvdc_delta_q, &q_update);
768 pc->uvac_delta_q = get_delta_q(bc, pc->uvac_delta_q, &q_update);
769
770 if (q_update)
771 vp8cx_init_de_quantizer(pbi);
772
773 /* MB level dequantizer setup */
774 mb_init_dequantizer(pbi, &pbi->mb);
775 }
776
777 /* Determine if the golden frame or ARF buffer should be updated and how.
778 * For all non key frames the GF and ARF refresh flags and sign bias
779 * flags must be set explicitly.
780 */
781 if (pc->frame_type != KEY_FRAME)
782 {
783 /* Should the GF or ARF be updated from the current frame */
784 pc->refresh_golden_frame = vp8_read_bit(bc);
785 pc->refresh_alt_ref_frame = vp8_read_bit(bc);
786
787 /* Buffer to buffer copy flags. */
788 pc->copy_buffer_to_gf = 0;
789
790 if (!pc->refresh_golden_frame)
791 pc->copy_buffer_to_gf = vp8_read_literal(bc, 2);
792
793 pc->copy_buffer_to_arf = 0;
794
795 if (!pc->refresh_alt_ref_frame)
796 pc->copy_buffer_to_arf = vp8_read_literal(bc, 2);
797
798 pc->ref_frame_sign_bias[GOLDEN_FRAME] = vp8_read_bit(bc);
799 pc->ref_frame_sign_bias[ALTREF_FRAME] = vp8_read_bit(bc);
800 }
801
802 pc->refresh_entropy_probs = vp8_read_bit(bc);
803 if (pc->refresh_entropy_probs == 0)
804 {
805 vpx_memcpy(&pc->lfc, &pc->fc, sizeof(pc->fc));
806 }
807
808 pc->refresh_last_frame = pc->frame_type == KEY_FRAME || vp8_read_bit(bc);
809
810 if (0)
811 {
812 FILE *z = fopen("decodestats.stt", "a");
813 fprintf(z, "%6d F:%d,G:%d,A:%d,L:%d,Q:%d\n",
814 pc->current_video_frame,
815 pc->frame_type,
816 pc->refresh_golden_frame,
817 pc->refresh_alt_ref_frame,
818 pc->refresh_last_frame,
819 pc->base_qindex);
820 fclose(z);
821 }
822
823
824 {
825 /* read coef probability tree */
826
827 for (i = 0; i < BLOCK_TYPES; i++)
828 for (j = 0; j < COEF_BANDS; j++)
829 for (k = 0; k < PREV_COEF_CONTEXTS; k++)
830 for (l = 0; l < MAX_ENTROPY_TOKENS - 1; l++)
831 {
832
833 vp8_prob *const p = pc->fc.coef_probs [i][j][k] + l;
834
835 if (vp8_read(bc, vp8_coef_update_probs [i][j][k][l]))
836 {
837 *p = (vp8_prob)vp8_read_literal(bc, 8);
838
839 }
840 }
841 }
842
843 vpx_memcpy(&xd->pre, &pc->yv12_fb[pc->lst_fb_idx], sizeof(YV12_BUFFER_CONFIG));
844 vpx_memcpy(&xd->dst, &pc->yv12_fb[pc->new_fb_idx], sizeof(YV12_BUFFER_CONFIG));
845
846 /* set up frame new frame for intra coded blocks */
847 #if CONFIG_MULTITHREAD
848 if (!(pbi->b_multithreaded_rd) || pc->multi_token_partition == ONE_PARTITION || !(pc->filter_level))
849 #endif
850 vp8_setup_intra_recon(&pc->yv12_fb[pc->new_fb_idx]);
851
852 vp8_setup_block_dptrs(xd);
853
854 vp8_build_block_doffsets(xd);
855
856 /* clear out the coeff buffer */
857 vpx_memset(xd->qcoeff, 0, sizeof(xd->qcoeff));
858
859 /* Read the mb_no_coeff_skip flag */
860 pc->mb_no_coeff_skip = (int)vp8_read_bit(bc);
861
862
863 vp8_decode_mode_mvs(pbi);
864
865 vpx_memset(pc->above_context, 0, sizeof(ENTROPY_CONTEXT_PLANES) * pc->mb_cols);
866
867 vpx_memcpy(&xd->block[0].bmi, &xd->mode_info_context->bmi[0], sizeof(B_MODE_INFO));
868
869 #if CONFIG_MULTITHREAD
870 if (pbi->b_multithreaded_rd && pc->multi_token_partition != ONE_PARTITION)
871 {
872 vp8mt_decode_mb_rows(pbi, xd);
873 if(pbi->common.filter_level)
874 {
875 /*vp8_mt_loop_filter_frame(pbi);*/ /*cm, &pbi->mb, cm->filter_level);*/
876
877 pc->last_frame_type = pc->frame_type;
878 pc->last_filter_type = pc->filter_type;
879 pc->last_sharpness_level = pc->sharpness_level;
880 }
881 vp8_yv12_extend_frame_borders_ptr(&pc->yv12_fb[pc->new_fb_idx]); /*cm->frame_to_show);*/
882 }
883 else
884 #endif
885 {
886 int ibc = 0;
887 int num_part = 1 << pc->multi_token_partition;
888
889 /* Decode the individual macro block */
890 for (mb_row = 0; mb_row < pc->mb_rows; mb_row++)
891 {
892
893 if (num_part > 1)
894 {
895 xd->current_bc = & pbi->mbc[ibc];
896 ibc++;
897
898 if (ibc == num_part)
899 ibc = 0;
900 }
901
902 decode_mb_row(pbi, pc, mb_row, xd);
903 }
904 }
905
906
907 stop_token_decoder(pbi);
908
909 /* Collect information about decoder corruption. */
910 /* 1. Check first boolean decoder for errors. */
911 pc->yv12_fb[pc->new_fb_idx].corrupted =
912 vp8dx_bool_error(bc);
913 /* 2. Check the macroblock information */
914 pc->yv12_fb[pc->new_fb_idx].corrupted |=
915 xd->corrupted;
916
917 /* vpx_log("Decoder: Frame Decoded, Size Roughly:%d bytes \n",bc->pos+pbi->bc2.pos); */
918
919 /* If this was a kf or Gf note the Q used */
920 if ((pc->frame_type == KEY_FRAME) ||
921 pc->refresh_golden_frame || pc->refresh_alt_ref_frame)
922 {
923 pc->last_kf_gf_q = pc->base_qindex;
924 }
925
926 if (pc->refresh_entropy_probs == 0)
927 {
928 vpx_memcpy(&pc->fc, &pc->lfc, sizeof(pc->fc));
929 }
930
931 #ifdef PACKET_TESTING
932 {
933 FILE *f = fopen("decompressor.VP8", "ab");
934 unsigned int size = pbi->bc2.pos + pbi->bc.pos + 8;
935 fwrite((void *) &size, 4, 1, f);
936 fwrite((void *) pbi->Source, size, 1, f);
937 fclose(f);
938 }
939 #endif
940
941 return 0;
942 }
943