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 "header.h"
14 #include "reconintra.h"
15 #include "reconintra4x4.h"
16 #include "recon.h"
17 #include "reconinter.h"
18 #include "dequantize.h"
19 #include "detokenize.h"
20 #include "invtrans.h"
21 #include "alloccommon.h"
22 #include "entropymode.h"
23 #include "quant_common.h"
24 #include "vpx_scale/vpxscale.h"
25 #include "vpx_scale/yv12extend.h"
26 #include "setupintrarecon.h"
27
28 #include "decodemv.h"
29 #include "extend.h"
30 #include "vpx_mem/vpx_mem.h"
31 #include "idct.h"
32 #include "dequantize.h"
33 #include "predictdc.h"
34 #include "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 i;
44 int Q;
45 VP8_COMMON *const pc = & pbi->common;
46
47 for (Q = 0; Q < QINDEX_RANGE; Q++)
48 {
49 pc->Y1dequant[Q][0] = (short)vp8_dc_quant(Q, pc->y1dc_delta_q);
50 pc->Y2dequant[Q][0] = (short)vp8_dc2quant(Q, pc->y2dc_delta_q);
51 pc->UVdequant[Q][0] = (short)vp8_dc_uv_quant(Q, pc->uvdc_delta_q);
52
53 /* all the ac values = ; */
54 for (i = 1; i < 16; i++)
55 {
56 int rc = vp8_default_zig_zag1d[i];
57
58 pc->Y1dequant[Q][rc] = (short)vp8_ac_yquant(Q);
59 pc->Y2dequant[Q][rc] = (short)vp8_ac2quant(Q, pc->y2ac_delta_q);
60 pc->UVdequant[Q][rc] = (short)vp8_ac_uv_quant(Q, pc->uvac_delta_q);
61 }
62 }
63 }
64
mb_init_dequantizer(VP8D_COMP * pbi,MACROBLOCKD * xd)65 void mb_init_dequantizer(VP8D_COMP *pbi, MACROBLOCKD *xd)
66 {
67 int i;
68 int QIndex;
69 MB_MODE_INFO *mbmi = &xd->mode_info_context->mbmi;
70 VP8_COMMON *const pc = & pbi->common;
71
72 /* Decide whether to use the default or alternate baseline Q value. */
73 if (xd->segmentation_enabled)
74 {
75 /* Abs Value */
76 if (xd->mb_segement_abs_delta == SEGMENT_ABSDATA)
77 QIndex = xd->segment_feature_data[MB_LVL_ALT_Q][mbmi->segment_id];
78
79 /* Delta Value */
80 else
81 {
82 QIndex = pc->base_qindex + xd->segment_feature_data[MB_LVL_ALT_Q][mbmi->segment_id];
83 QIndex = (QIndex >= 0) ? ((QIndex <= MAXQ) ? QIndex : MAXQ) : 0; /* Clamp to valid range */
84 }
85 }
86 else
87 QIndex = pc->base_qindex;
88
89 /* Set up the block level dequant pointers */
90 for (i = 0; i < 16; i++)
91 {
92 xd->block[i].dequant = pc->Y1dequant[QIndex];
93 }
94
95 for (i = 16; i < 24; i++)
96 {
97 xd->block[i].dequant = pc->UVdequant[QIndex];
98 }
99
100 xd->block[24].dequant = pc->Y2dequant[QIndex];
101
102 }
103
104 #if CONFIG_RUNTIME_CPU_DETECT
105 #define RTCD_VTABLE(x) (&(pbi)->common.rtcd.x)
106 #else
107 #define RTCD_VTABLE(x) NULL
108 #endif
109
110 /* skip_recon_mb() is Modified: Instead of writing the result to predictor buffer and then copying it
111 * to dst buffer, we can write the result directly to dst buffer. This eliminates unnecessary copy.
112 */
skip_recon_mb(VP8D_COMP * pbi,MACROBLOCKD * xd)113 static void skip_recon_mb(VP8D_COMP *pbi, MACROBLOCKD *xd)
114 {
115 if (xd->frame_type == KEY_FRAME || xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME)
116 {
117
118 vp8_build_intra_predictors_mbuv_s(xd);
119 vp8_build_intra_predictors_mby_s_ptr(xd);
120
121 }
122 else
123 {
124 vp8_build_inter_predictors_mb_s(xd);
125 }
126 }
127
clamp_mv_to_umv_border(MV * mv,const MACROBLOCKD * xd)128 static void clamp_mv_to_umv_border(MV *mv, const MACROBLOCKD *xd)
129 {
130 /* If the MV points so far into the UMV border that no visible pixels
131 * are used for reconstruction, the subpel part of the MV can be
132 * discarded and the MV limited to 16 pixels with equivalent results.
133 *
134 * This limit kicks in at 19 pixels for the top and left edges, for
135 * the 16 pixels plus 3 taps right of the central pixel when subpel
136 * filtering. The bottom and right edges use 16 pixels plus 2 pixels
137 * left of the central pixel when filtering.
138 */
139 if (mv->col < (xd->mb_to_left_edge - (19 << 3)))
140 mv->col = xd->mb_to_left_edge - (16 << 3);
141 else if (mv->col > xd->mb_to_right_edge + (18 << 3))
142 mv->col = xd->mb_to_right_edge + (16 << 3);
143
144 if (mv->row < (xd->mb_to_top_edge - (19 << 3)))
145 mv->row = xd->mb_to_top_edge - (16 << 3);
146 else if (mv->row > xd->mb_to_bottom_edge + (18 << 3))
147 mv->row = xd->mb_to_bottom_edge + (16 << 3);
148 }
149
150 /* A version of the above function for chroma block MVs.*/
clamp_uvmv_to_umv_border(MV * mv,const MACROBLOCKD * xd)151 static void clamp_uvmv_to_umv_border(MV *mv, const MACROBLOCKD *xd)
152 {
153 mv->col = (2*mv->col < (xd->mb_to_left_edge - (19 << 3))) ? (xd->mb_to_left_edge - (16 << 3)) >> 1 : mv->col;
154 mv->col = (2*mv->col > xd->mb_to_right_edge + (18 << 3)) ? (xd->mb_to_right_edge + (16 << 3)) >> 1 : mv->col;
155
156 mv->row = (2*mv->row < (xd->mb_to_top_edge - (19 << 3))) ? (xd->mb_to_top_edge - (16 << 3)) >> 1 : mv->row;
157 mv->row = (2*mv->row > xd->mb_to_bottom_edge + (18 << 3)) ? (xd->mb_to_bottom_edge + (16 << 3)) >> 1 : mv->row;
158 }
159
clamp_mvs(MACROBLOCKD * xd)160 void clamp_mvs(MACROBLOCKD *xd)
161 {
162 if (xd->mode_info_context->mbmi.mode == SPLITMV)
163 {
164 int i;
165
166 for (i=0; i<16; i++)
167 clamp_mv_to_umv_border(&xd->block[i].bmi.mv.as_mv, xd);
168 for (i=16; i<24; i++)
169 clamp_uvmv_to_umv_border(&xd->block[i].bmi.mv.as_mv, xd);
170 }
171 else
172 {
173 clamp_mv_to_umv_border(&xd->mode_info_context->mbmi.mv.as_mv, xd);
174 clamp_uvmv_to_umv_border(&xd->block[16].bmi.mv.as_mv, xd);
175 }
176
177 }
178
vp8_decode_macroblock(VP8D_COMP * pbi,MACROBLOCKD * xd)179 void vp8_decode_macroblock(VP8D_COMP *pbi, MACROBLOCKD *xd)
180 {
181 int eobtotal = 0;
182 int i, do_clamp = xd->mode_info_context->mbmi.need_to_clamp_mvs;
183
184 if (xd->mode_info_context->mbmi.mb_skip_coeff)
185 {
186 vp8_reset_mb_tokens_context(xd);
187 }
188 else
189 {
190 eobtotal = vp8_decode_mb_tokens(pbi, xd);
191 }
192
193 /* Perform temporary clamping of the MV to be used for prediction */
194 if (do_clamp)
195 {
196 clamp_mvs(xd);
197 }
198
199 xd->mode_info_context->mbmi.dc_diff = 1;
200
201 if (xd->mode_info_context->mbmi.mode != B_PRED && xd->mode_info_context->mbmi.mode != SPLITMV && eobtotal == 0)
202 {
203 xd->mode_info_context->mbmi.dc_diff = 0;
204 skip_recon_mb(pbi, xd);
205 return;
206 }
207
208 if (xd->segmentation_enabled)
209 mb_init_dequantizer(pbi, xd);
210
211 /* do prediction */
212 if (xd->frame_type == KEY_FRAME || xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME)
213 {
214 vp8_build_intra_predictors_mbuv(xd);
215
216 if (xd->mode_info_context->mbmi.mode != B_PRED)
217 {
218 vp8_build_intra_predictors_mby_ptr(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
vp8_decode_mb_row(VP8D_COMP * pbi,VP8_COMMON * pc,int mb_row,MACROBLOCKD * xd)323 void vp8_decode_mb_row(VP8D_COMP *pbi,
324 VP8_COMMON *pc,
325 int mb_row,
326 MACROBLOCKD *xd)
327 {
328
329 int i;
330 int recon_yoffset, recon_uvoffset;
331 int mb_col;
332 int ref_fb_idx = pc->lst_fb_idx;
333 int dst_fb_idx = pc->new_fb_idx;
334 int recon_y_stride = pc->yv12_fb[ref_fb_idx].y_stride;
335 int recon_uv_stride = pc->yv12_fb[ref_fb_idx].uv_stride;
336
337 vpx_memset(&pc->left_context, 0, sizeof(pc->left_context));
338 recon_yoffset = mb_row * recon_y_stride * 16;
339 recon_uvoffset = mb_row * recon_uv_stride * 8;
340 /* reset above block coeffs */
341
342 xd->above_context = pc->above_context;
343 xd->up_available = (mb_row != 0);
344
345 xd->mb_to_top_edge = -((mb_row * 16)) << 3;
346 xd->mb_to_bottom_edge = ((pc->mb_rows - 1 - mb_row) * 16) << 3;
347
348 for (mb_col = 0; mb_col < pc->mb_cols; mb_col++)
349 {
350
351 if (xd->mode_info_context->mbmi.mode == SPLITMV || xd->mode_info_context->mbmi.mode == B_PRED)
352 {
353 for (i = 0; i < 16; i++)
354 {
355 BLOCKD *d = &xd->block[i];
356 vpx_memcpy(&d->bmi, &xd->mode_info_context->bmi[i], sizeof(B_MODE_INFO));
357 }
358 }
359
360 /* Distance of Mb to the various image edges.
361 * These are specified to 8th pel as they are always compared to values that are in 1/8th pel units
362 */
363 xd->mb_to_left_edge = -((mb_col * 16) << 3);
364 xd->mb_to_right_edge = ((pc->mb_cols - 1 - mb_col) * 16) << 3;
365
366 xd->dst.y_buffer = pc->yv12_fb[dst_fb_idx].y_buffer + recon_yoffset;
367 xd->dst.u_buffer = pc->yv12_fb[dst_fb_idx].u_buffer + recon_uvoffset;
368 xd->dst.v_buffer = pc->yv12_fb[dst_fb_idx].v_buffer + recon_uvoffset;
369
370 xd->left_available = (mb_col != 0);
371
372 /* Select the appropriate reference frame for this MB */
373 if (xd->mode_info_context->mbmi.ref_frame == LAST_FRAME)
374 ref_fb_idx = pc->lst_fb_idx;
375 else if (xd->mode_info_context->mbmi.ref_frame == GOLDEN_FRAME)
376 ref_fb_idx = pc->gld_fb_idx;
377 else
378 ref_fb_idx = pc->alt_fb_idx;
379
380 xd->pre.y_buffer = pc->yv12_fb[ref_fb_idx].y_buffer + recon_yoffset;
381 xd->pre.u_buffer = pc->yv12_fb[ref_fb_idx].u_buffer + recon_uvoffset;
382 xd->pre.v_buffer = pc->yv12_fb[ref_fb_idx].v_buffer + recon_uvoffset;
383
384 vp8_build_uvmvs(xd, pc->full_pixel);
385
386 /*
387 if(pc->current_video_frame==0 &&mb_col==1 && mb_row==0)
388 pbi->debugoutput =1;
389 else
390 pbi->debugoutput =0;
391 */
392 vp8_decode_macroblock(pbi, xd);
393
394
395 recon_yoffset += 16;
396 recon_uvoffset += 8;
397
398 ++xd->mode_info_context; /* next mb */
399
400 xd->above_context++;
401
402 }
403
404 /* adjust to the next row of mbs */
405 vp8_extend_mb_row(
406 &pc->yv12_fb[dst_fb_idx],
407 xd->dst.y_buffer + 16, xd->dst.u_buffer + 8, xd->dst.v_buffer + 8
408 );
409
410 ++xd->mode_info_context; /* skip prediction column */
411 }
412
413
read_partition_size(const unsigned char * cx_size)414 static unsigned int read_partition_size(const unsigned char *cx_size)
415 {
416 const unsigned int size =
417 cx_size[0] + (cx_size[1] << 8) + (cx_size[2] << 16);
418 return size;
419 }
420
421
setup_token_decoder(VP8D_COMP * pbi,const unsigned char * cx_data)422 static void setup_token_decoder(VP8D_COMP *pbi,
423 const unsigned char *cx_data)
424 {
425 int num_part;
426 int i;
427 VP8_COMMON *pc = &pbi->common;
428 const unsigned char *user_data_end = pbi->Source + pbi->source_sz;
429 vp8_reader *bool_decoder;
430 const unsigned char *partition;
431
432 /* Parse number of token partitions to use */
433 pc->multi_token_partition = (TOKEN_PARTITION)vp8_read_literal(&pbi->bc, 2);
434 num_part = 1 << pc->multi_token_partition;
435
436 /* Set up pointers to the first partition */
437 partition = cx_data;
438 bool_decoder = &pbi->bc2;
439
440 if (num_part > 1)
441 {
442 CHECK_MEM_ERROR(pbi->mbc, vpx_malloc(num_part * sizeof(vp8_reader)));
443 bool_decoder = pbi->mbc;
444 partition += 3 * (num_part - 1);
445 }
446
447 for (i = 0; i < num_part; i++)
448 {
449 const unsigned char *partition_size_ptr = cx_data + i * 3;
450 ptrdiff_t partition_size;
451
452 /* Calculate the length of this partition. The last partition
453 * size is implicit.
454 */
455 if (i < num_part - 1)
456 {
457 partition_size = read_partition_size(partition_size_ptr);
458 }
459 else
460 {
461 partition_size = user_data_end - partition;
462 }
463
464 if (partition + partition_size > user_data_end
465 || partition + partition_size < partition)
466 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
467 "Truncated packet or corrupt partition "
468 "%d length", i + 1);
469
470 if (vp8dx_start_decode(bool_decoder, IF_RTCD(&pbi->dboolhuff),
471 partition, partition_size))
472 vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR,
473 "Failed to allocate bool decoder %d", i + 1);
474
475 /* Advance to the next partition */
476 partition += partition_size;
477 bool_decoder++;
478 }
479
480 /* Clamp number of decoder threads */
481 if (pbi->decoding_thread_count > num_part - 1)
482 pbi->decoding_thread_count = num_part - 1;
483 }
484
485
stop_token_decoder(VP8D_COMP * pbi)486 static void stop_token_decoder(VP8D_COMP *pbi)
487 {
488 int i;
489 VP8_COMMON *pc = &pbi->common;
490
491 if (pc->multi_token_partition != ONE_PARTITION)
492 vpx_free(pbi->mbc);
493 }
494
init_frame(VP8D_COMP * pbi)495 static void init_frame(VP8D_COMP *pbi)
496 {
497 VP8_COMMON *const pc = & pbi->common;
498 MACROBLOCKD *const xd = & pbi->mb;
499
500 if (pc->frame_type == KEY_FRAME)
501 {
502 /* Various keyframe initializations */
503 vpx_memcpy(pc->fc.mvc, vp8_default_mv_context, sizeof(vp8_default_mv_context));
504
505 vp8_init_mbmode_probs(pc);
506
507 vp8_default_coef_probs(pc);
508 vp8_kf_default_bmode_probs(pc->kf_bmode_prob);
509
510 /* reset the segment feature data to 0 with delta coding (Default state). */
511 vpx_memset(xd->segment_feature_data, 0, sizeof(xd->segment_feature_data));
512 xd->mb_segement_abs_delta = SEGMENT_DELTADATA;
513
514 /* reset the mode ref deltasa for loop filter */
515 vpx_memset(xd->ref_lf_deltas, 0, sizeof(xd->ref_lf_deltas));
516 vpx_memset(xd->mode_lf_deltas, 0, sizeof(xd->mode_lf_deltas));
517
518 /* All buffers are implicitly updated on key frames. */
519 pc->refresh_golden_frame = 1;
520 pc->refresh_alt_ref_frame = 1;
521 pc->copy_buffer_to_gf = 0;
522 pc->copy_buffer_to_arf = 0;
523
524 /* Note that Golden and Altref modes cannot be used on a key frame so
525 * ref_frame_sign_bias[] is undefined and meaningless
526 */
527 pc->ref_frame_sign_bias[GOLDEN_FRAME] = 0;
528 pc->ref_frame_sign_bias[ALTREF_FRAME] = 0;
529 }
530 else
531 {
532 if (!pc->use_bilinear_mc_filter)
533 pc->mcomp_filter_type = SIXTAP;
534 else
535 pc->mcomp_filter_type = BILINEAR;
536
537 /* To enable choice of different interploation filters */
538 if (pc->mcomp_filter_type == SIXTAP)
539 {
540 xd->subpixel_predict = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap4x4);
541 xd->subpixel_predict8x4 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap8x4);
542 xd->subpixel_predict8x8 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap8x8);
543 xd->subpixel_predict16x16 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap16x16);
544 }
545 else
546 {
547 xd->subpixel_predict = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear4x4);
548 xd->subpixel_predict8x4 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear8x4);
549 xd->subpixel_predict8x8 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear8x8);
550 xd->subpixel_predict16x16 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear16x16);
551 }
552 }
553
554 xd->left_context = &pc->left_context;
555 xd->mode_info_context = pc->mi;
556 xd->frame_type = pc->frame_type;
557 xd->mode_info_context->mbmi.mode = DC_PRED;
558 xd->mode_info_stride = pc->mode_info_stride;
559 }
560
vp8_decode_frame(VP8D_COMP * pbi)561 int vp8_decode_frame(VP8D_COMP *pbi)
562 {
563 vp8_reader *const bc = & pbi->bc;
564 VP8_COMMON *const pc = & pbi->common;
565 MACROBLOCKD *const xd = & pbi->mb;
566 const unsigned char *data = (const unsigned char *)pbi->Source;
567 const unsigned char *const data_end = data + pbi->source_sz;
568 ptrdiff_t first_partition_length_in_bytes;
569
570 int mb_row;
571 int i, j, k, l;
572 const int *const mb_feature_data_bits = vp8_mb_feature_data_bits;
573
574 if (data_end - data < 3)
575 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
576 "Truncated packet");
577 pc->frame_type = (FRAME_TYPE)(data[0] & 1);
578 pc->version = (data[0] >> 1) & 7;
579 pc->show_frame = (data[0] >> 4) & 1;
580 first_partition_length_in_bytes =
581 (data[0] | (data[1] << 8) | (data[2] << 16)) >> 5;
582 data += 3;
583
584 if (data + first_partition_length_in_bytes > data_end
585 || data + first_partition_length_in_bytes < data)
586 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
587 "Truncated packet or corrupt partition 0 length");
588 vp8_setup_version(pc);
589
590 if (pc->frame_type == KEY_FRAME)
591 {
592 const int Width = pc->Width;
593 const int Height = pc->Height;
594
595 /* vet via sync code */
596 if (data[0] != 0x9d || data[1] != 0x01 || data[2] != 0x2a)
597 vpx_internal_error(&pc->error, VPX_CODEC_UNSUP_BITSTREAM,
598 "Invalid frame sync code");
599
600 pc->Width = (data[3] | (data[4] << 8)) & 0x3fff;
601 pc->horiz_scale = data[4] >> 6;
602 pc->Height = (data[5] | (data[6] << 8)) & 0x3fff;
603 pc->vert_scale = data[6] >> 6;
604 data += 7;
605
606 if (Width != pc->Width || Height != pc->Height)
607 {
608 int prev_mb_rows = pc->mb_rows;
609
610 if (pc->Width <= 0)
611 {
612 pc->Width = Width;
613 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
614 "Invalid frame width");
615 }
616
617 if (pc->Height <= 0)
618 {
619 pc->Height = Height;
620 vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME,
621 "Invalid frame height");
622 }
623
624 if (vp8_alloc_frame_buffers(pc, pc->Width, pc->Height))
625 vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR,
626 "Failed to allocate frame buffers");
627
628 #if CONFIG_MULTITHREAD
629 if (pbi->b_multithreaded_rd)
630 vp8mt_alloc_temp_buffers(pbi, pc->Width, prev_mb_rows);
631 #endif
632 }
633 }
634
635 if (pc->Width == 0 || pc->Height == 0)
636 {
637 return -1;
638 }
639
640 init_frame(pbi);
641
642 if (vp8dx_start_decode(bc, IF_RTCD(&pbi->dboolhuff),
643 data, data_end - data))
644 vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR,
645 "Failed to allocate bool decoder 0");
646 if (pc->frame_type == KEY_FRAME) {
647 pc->clr_type = (YUV_TYPE)vp8_read_bit(bc);
648 pc->clamp_type = (CLAMP_TYPE)vp8_read_bit(bc);
649 }
650
651 /* Is segmentation enabled */
652 xd->segmentation_enabled = (unsigned char)vp8_read_bit(bc);
653
654 if (xd->segmentation_enabled)
655 {
656 /* Signal whether or not the segmentation map is being explicitly updated this frame. */
657 xd->update_mb_segmentation_map = (unsigned char)vp8_read_bit(bc);
658 xd->update_mb_segmentation_data = (unsigned char)vp8_read_bit(bc);
659
660 if (xd->update_mb_segmentation_data)
661 {
662 xd->mb_segement_abs_delta = (unsigned char)vp8_read_bit(bc);
663
664 vpx_memset(xd->segment_feature_data, 0, sizeof(xd->segment_feature_data));
665
666 /* For each segmentation feature (Quant and loop filter level) */
667 for (i = 0; i < MB_LVL_MAX; i++)
668 {
669 for (j = 0; j < MAX_MB_SEGMENTS; j++)
670 {
671 /* Frame level data */
672 if (vp8_read_bit(bc))
673 {
674 xd->segment_feature_data[i][j] = (signed char)vp8_read_literal(bc, mb_feature_data_bits[i]);
675
676 if (vp8_read_bit(bc))
677 xd->segment_feature_data[i][j] = -xd->segment_feature_data[i][j];
678 }
679 else
680 xd->segment_feature_data[i][j] = 0;
681 }
682 }
683 }
684
685 if (xd->update_mb_segmentation_map)
686 {
687 /* Which macro block level features are enabled */
688 vpx_memset(xd->mb_segment_tree_probs, 255, sizeof(xd->mb_segment_tree_probs));
689
690 /* Read the probs used to decode the segment id for each macro block. */
691 for (i = 0; i < MB_FEATURE_TREE_PROBS; i++)
692 {
693 /* If not explicitly set value is defaulted to 255 by memset above */
694 if (vp8_read_bit(bc))
695 xd->mb_segment_tree_probs[i] = (vp8_prob)vp8_read_literal(bc, 8);
696 }
697 }
698 }
699
700 /* Read the loop filter level and type */
701 pc->filter_type = (LOOPFILTERTYPE) vp8_read_bit(bc);
702 pc->filter_level = vp8_read_literal(bc, 6);
703 pc->sharpness_level = vp8_read_literal(bc, 3);
704
705 /* Read in loop filter deltas applied at the MB level based on mode or ref frame. */
706 xd->mode_ref_lf_delta_update = 0;
707 xd->mode_ref_lf_delta_enabled = (unsigned char)vp8_read_bit(bc);
708
709 if (xd->mode_ref_lf_delta_enabled)
710 {
711 /* Do the deltas need to be updated */
712 xd->mode_ref_lf_delta_update = (unsigned char)vp8_read_bit(bc);
713
714 if (xd->mode_ref_lf_delta_update)
715 {
716 /* Send update */
717 for (i = 0; i < MAX_REF_LF_DELTAS; i++)
718 {
719 if (vp8_read_bit(bc))
720 {
721 /*sign = vp8_read_bit( bc );*/
722 xd->ref_lf_deltas[i] = (signed char)vp8_read_literal(bc, 6);
723
724 if (vp8_read_bit(bc)) /* Apply sign */
725 xd->ref_lf_deltas[i] = xd->ref_lf_deltas[i] * -1;
726 }
727 }
728
729 /* Send update */
730 for (i = 0; i < MAX_MODE_LF_DELTAS; i++)
731 {
732 if (vp8_read_bit(bc))
733 {
734 /*sign = vp8_read_bit( bc );*/
735 xd->mode_lf_deltas[i] = (signed char)vp8_read_literal(bc, 6);
736
737 if (vp8_read_bit(bc)) /* Apply sign */
738 xd->mode_lf_deltas[i] = xd->mode_lf_deltas[i] * -1;
739 }
740 }
741 }
742 }
743
744 setup_token_decoder(pbi, data + first_partition_length_in_bytes);
745 xd->current_bc = &pbi->bc2;
746
747 /* Read the default quantizers. */
748 {
749 int Q, q_update;
750
751 Q = vp8_read_literal(bc, 7); /* AC 1st order Q = default */
752 pc->base_qindex = Q;
753 q_update = 0;
754 pc->y1dc_delta_q = get_delta_q(bc, pc->y1dc_delta_q, &q_update);
755 pc->y2dc_delta_q = get_delta_q(bc, pc->y2dc_delta_q, &q_update);
756 pc->y2ac_delta_q = get_delta_q(bc, pc->y2ac_delta_q, &q_update);
757 pc->uvdc_delta_q = get_delta_q(bc, pc->uvdc_delta_q, &q_update);
758 pc->uvac_delta_q = get_delta_q(bc, pc->uvac_delta_q, &q_update);
759
760 if (q_update)
761 vp8cx_init_de_quantizer(pbi);
762
763 /* MB level dequantizer setup */
764 mb_init_dequantizer(pbi, &pbi->mb);
765 }
766
767 /* Determine if the golden frame or ARF buffer should be updated and how.
768 * For all non key frames the GF and ARF refresh flags and sign bias
769 * flags must be set explicitly.
770 */
771 if (pc->frame_type != KEY_FRAME)
772 {
773 /* Should the GF or ARF be updated from the current frame */
774 pc->refresh_golden_frame = vp8_read_bit(bc);
775 pc->refresh_alt_ref_frame = vp8_read_bit(bc);
776
777 /* Buffer to buffer copy flags. */
778 pc->copy_buffer_to_gf = 0;
779
780 if (!pc->refresh_golden_frame)
781 pc->copy_buffer_to_gf = vp8_read_literal(bc, 2);
782
783 pc->copy_buffer_to_arf = 0;
784
785 if (!pc->refresh_alt_ref_frame)
786 pc->copy_buffer_to_arf = vp8_read_literal(bc, 2);
787
788 pc->ref_frame_sign_bias[GOLDEN_FRAME] = vp8_read_bit(bc);
789 pc->ref_frame_sign_bias[ALTREF_FRAME] = vp8_read_bit(bc);
790 }
791
792 pc->refresh_entropy_probs = vp8_read_bit(bc);
793 if (pc->refresh_entropy_probs == 0)
794 {
795 vpx_memcpy(&pc->lfc, &pc->fc, sizeof(pc->fc));
796 }
797
798 pc->refresh_last_frame = pc->frame_type == KEY_FRAME || vp8_read_bit(bc);
799
800 if (0)
801 {
802 FILE *z = fopen("decodestats.stt", "a");
803 fprintf(z, "%6d F:%d,G:%d,A:%d,L:%d,Q:%d\n",
804 pc->current_video_frame,
805 pc->frame_type,
806 pc->refresh_golden_frame,
807 pc->refresh_alt_ref_frame,
808 pc->refresh_last_frame,
809 pc->base_qindex);
810 fclose(z);
811 }
812
813
814 {
815 /* read coef probability tree */
816
817 for (i = 0; i < BLOCK_TYPES; i++)
818 for (j = 0; j < COEF_BANDS; j++)
819 for (k = 0; k < PREV_COEF_CONTEXTS; k++)
820 for (l = 0; l < MAX_ENTROPY_TOKENS - 1; l++)
821 {
822
823 vp8_prob *const p = pc->fc.coef_probs [i][j][k] + l;
824
825 if (vp8_read(bc, vp8_coef_update_probs [i][j][k][l]))
826 {
827 *p = (vp8_prob)vp8_read_literal(bc, 8);
828
829 }
830 }
831 }
832
833 vpx_memcpy(&xd->pre, &pc->yv12_fb[pc->lst_fb_idx], sizeof(YV12_BUFFER_CONFIG));
834 vpx_memcpy(&xd->dst, &pc->yv12_fb[pc->new_fb_idx], sizeof(YV12_BUFFER_CONFIG));
835
836 /* set up frame new frame for intra coded blocks */
837 if (!(pbi->b_multithreaded_rd) || pc->multi_token_partition == ONE_PARTITION || !(pc->filter_level))
838 vp8_setup_intra_recon(&pc->yv12_fb[pc->new_fb_idx]);
839
840 vp8_setup_block_dptrs(xd);
841
842 vp8_build_block_doffsets(xd);
843
844 /* clear out the coeff buffer */
845 vpx_memset(xd->qcoeff, 0, sizeof(xd->qcoeff));
846
847 /* Read the mb_no_coeff_skip flag */
848 pc->mb_no_coeff_skip = (int)vp8_read_bit(bc);
849
850
851 vp8_decode_mode_mvs(pbi);
852
853 vpx_memset(pc->above_context, 0, sizeof(ENTROPY_CONTEXT_PLANES) * pc->mb_cols);
854
855 vpx_memcpy(&xd->block[0].bmi, &xd->mode_info_context->bmi[0], sizeof(B_MODE_INFO));
856
857 if (pbi->b_multithreaded_rd && pc->multi_token_partition != ONE_PARTITION)
858 {
859 vp8mt_decode_mb_rows(pbi, xd);
860 if(pbi->common.filter_level)
861 {
862 /*vp8_mt_loop_filter_frame(pbi);*/ /*cm, &pbi->mb, cm->filter_level);*/
863
864 pc->last_frame_type = pc->frame_type;
865 pc->last_filter_type = pc->filter_type;
866 pc->last_sharpness_level = pc->sharpness_level;
867 }
868 vp8_yv12_extend_frame_borders_ptr(&pc->yv12_fb[pc->new_fb_idx]); /*cm->frame_to_show);*/
869 }
870 else
871 {
872 int ibc = 0;
873 int num_part = 1 << pc->multi_token_partition;
874
875 /* Decode the individual macro block */
876 for (mb_row = 0; mb_row < pc->mb_rows; mb_row++)
877 {
878
879 if (num_part > 1)
880 {
881 xd->current_bc = & pbi->mbc[ibc];
882 ibc++;
883
884 if (ibc == num_part)
885 ibc = 0;
886 }
887
888 vp8_decode_mb_row(pbi, pc, mb_row, xd);
889 }
890 }
891
892
893 stop_token_decoder(pbi);
894
895 /* vpx_log("Decoder: Frame Decoded, Size Roughly:%d bytes \n",bc->pos+pbi->bc2.pos); */
896
897 /* If this was a kf or Gf note the Q used */
898 if ((pc->frame_type == KEY_FRAME) ||
899 pc->refresh_golden_frame || pc->refresh_alt_ref_frame)
900 {
901 pc->last_kf_gf_q = pc->base_qindex;
902 }
903
904 if (pc->refresh_entropy_probs == 0)
905 {
906 vpx_memcpy(&pc->fc, &pc->lfc, sizeof(pc->fc));
907 }
908
909 #ifdef PACKET_TESTING
910 {
911 FILE *f = fopen("decompressor.VP8", "ab");
912 unsigned int size = pbi->bc2.pos + pbi->bc.pos + 8;
913 fwrite((void *) &size, 4, 1, f);
914 fwrite((void *) pbi->Source, size, 1, f);
915 fclose(f);
916 }
917 #endif
918
919 return 0;
920 }
921