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Fix two msvc build issues
[aom.git] / vp10 / encoder / bitstream.c
blob3765fa879ffdc2616c663c2ad1a2815677146366
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 #include <assert.h>
12 #include <stdio.h>
13 #include <limits.h>
14
15 #include "vpx/vpx_encoder.h"
16 #include "vpx_dsp/bitwriter_buffer.h"
17 #include "vpx_dsp/vpx_dsp_common.h"
18 #include "vpx_mem/vpx_mem.h"
19 #include "vpx_ports/mem_ops.h"
20 #include "vpx_ports/system_state.h"
21
22 #include "vp10/common/entropy.h"
23 #include "vp10/common/entropymode.h"
24 #include "vp10/common/entropymv.h"
25 #include "vp10/common/mvref_common.h"
26 #include "vp10/common/pred_common.h"
27 #include "vp10/common/seg_common.h"
28 #include "vp10/common/tile_common.h"
29
30 #include "vp10/encoder/cost.h"
31 #include "vp10/encoder/bitstream.h"
32 #include "vp10/encoder/encodemv.h"
33 #include "vp10/encoder/mcomp.h"
34 #include "vp10/encoder/segmentation.h"
35 #include "vp10/encoder/subexp.h"
36 #include "vp10/encoder/tokenize.h"
37
38 static const struct vp10_token intra_mode_encodings[INTRA_MODES] = {
39 {0, 1}, {6, 3}, {28, 5}, {30, 5}, {58, 6}, {59, 6}, {126, 7}, {127, 7},
40 {62, 6}, {2, 2}};
41 static const struct vp10_token switchable_interp_encodings[SWITCHABLE_FILTERS] =
42 {{0, 1}, {2, 2}, {3, 2}};
43 static const struct vp10_token partition_encodings[PARTITION_TYPES] =
44 {{0, 1}, {2, 2}, {6, 3}, {7, 3}};
45 static const struct vp10_token inter_mode_encodings[INTER_MODES] =
46 {{2, 2}, {6, 3}, {0, 1}, {7, 3}};
47
48 static INLINE void write_uniform(vpx_writer *w, int n, int v) {
49 int l = get_unsigned_bits(n);
50 int m = (1 << l) - n;
51 if (l == 0)
52 return;
53 if (v < m) {
54 vpx_write_literal(w, v, l - 1);
55 } else {
56 vpx_write_literal(w, m + ((v - m) >> 1), l - 1);
57 vpx_write_literal(w, (v - m) & 1, 1);
58 }
59 }
60
61 static void write_intra_mode(vpx_writer *w, PREDICTION_MODE mode,
62 const vpx_prob *probs) {
63 vp10_write_token(w, vp10_intra_mode_tree, probs, &intra_mode_encodings[mode]);
64 }
65
66 static void write_inter_mode(vpx_writer *w, PREDICTION_MODE mode,
67 const vpx_prob *probs) {
68 assert(is_inter_mode(mode));
69 vp10_write_token(w, vp10_inter_mode_tree, probs,
70 &inter_mode_encodings[INTER_OFFSET(mode)]);
71 }
72
73 static void encode_unsigned_max(struct vpx_write_bit_buffer *wb,
74 int data, int max) {
75 vpx_wb_write_literal(wb, data, get_unsigned_bits(max));
76 }
77
78 static void prob_diff_update(const vpx_tree_index *tree,
79 vpx_prob probs[/*n - 1*/],
80 const unsigned int counts[/*n - 1*/],
81 int n, vpx_writer *w) {
82 int i;
83 unsigned int branch_ct[32][2];
84
85 // Assuming max number of probabilities <= 32
86 assert(n <= 32);
87
88 vp10_tree_probs_from_distribution(tree, branch_ct, counts);
89 for (i = 0; i < n - 1; ++i)
90 vp10_cond_prob_diff_update(w, &probs[i], branch_ct[i]);
91 }
92
93 static void write_selected_tx_size(const VP10_COMMON *cm,
94 const MACROBLOCKD *xd, vpx_writer *w) {
95 TX_SIZE tx_size = xd->mi[0]->mbmi.tx_size;
96 BLOCK_SIZE bsize = xd->mi[0]->mbmi.sb_type;
97 const TX_SIZE max_tx_size = max_txsize_lookup[bsize];
98 const vpx_prob *const tx_probs = get_tx_probs2(max_tx_size, xd,
99 &cm->fc->tx_probs);
100 vpx_write(w, tx_size != TX_4X4, tx_probs[0]);
101 if (tx_size != TX_4X4 && max_tx_size >= TX_16X16) {
102 vpx_write(w, tx_size != TX_8X8, tx_probs[1]);
103 if (tx_size != TX_8X8 && max_tx_size >= TX_32X32)
104 vpx_write(w, tx_size != TX_16X16, tx_probs[2]);
105 }
106 }
107
108 static int write_skip(const VP10_COMMON *cm, const MACROBLOCKD *xd,
109 int segment_id, const MODE_INFO *mi, vpx_writer *w) {
110 if (segfeature_active(&cm->seg, segment_id, SEG_LVL_SKIP)) {
111 return 1;
112 } else {
113 const int skip = mi->mbmi.skip;
114 vpx_write(w, skip, vp10_get_skip_prob(cm, xd));
115 return skip;
116 }
117 }
118
119 static void update_skip_probs(VP10_COMMON *cm, vpx_writer *w,
120 FRAME_COUNTS *counts) {
121 int k;
122
123 for (k = 0; k < SKIP_CONTEXTS; ++k)
124 vp10_cond_prob_diff_update(w, &cm->fc->skip_probs[k], counts->skip[k]);
125 }
126
127 static void update_switchable_interp_probs(VP10_COMMON *cm, vpx_writer *w,
128 FRAME_COUNTS *counts) {
129 int j;
130 for (j = 0; j < SWITCHABLE_FILTER_CONTEXTS; ++j)
131 prob_diff_update(vp10_switchable_interp_tree,
132 cm->fc->switchable_interp_prob[j],
133 counts->switchable_interp[j], SWITCHABLE_FILTERS, w);
134 }
135
136 static void pack_mb_tokens(vpx_writer *w,
137 TOKENEXTRA **tp, const TOKENEXTRA *const stop,
138 vpx_bit_depth_t bit_depth, const TX_SIZE tx) {
139 TOKENEXTRA *p = *tp;
140 #if !CONFIG_MISC_FIXES
141 (void) tx;
142 #endif
143
144 while (p < stop && p->token != EOSB_TOKEN) {
145 const int t = p->token;
146 const struct vp10_token *const a = &vp10_coef_encodings[t];
147 int i = 0;
148 int v = a->value;
149 int n = a->len;
150 #if CONFIG_VP9_HIGHBITDEPTH
151 const vp10_extra_bit *b;
152 if (bit_depth == VPX_BITS_12)
153 b = &vp10_extra_bits_high12[t];
154 else if (bit_depth == VPX_BITS_10)
155 b = &vp10_extra_bits_high10[t];
156 else
157 b = &vp10_extra_bits[t];
158 #else
159 const vp10_extra_bit *const b = &vp10_extra_bits[t];
160 (void) bit_depth;
161 #endif // CONFIG_VP9_HIGHBITDEPTH
162
163 /* skip one or two nodes */
164 if (p->skip_eob_node) {
165 n -= p->skip_eob_node;
166 i = 2 * p->skip_eob_node;
167 }
168
169 // TODO(jbb): expanding this can lead to big gains. It allows
170 // much better branch prediction and would enable us to avoid numerous
171 // lookups and compares.
172
173 // If we have a token that's in the constrained set, the coefficient tree
174 // is split into two treed writes. The first treed write takes care of the
175 // unconstrained nodes. The second treed write takes care of the
176 // constrained nodes.
177 if (t >= TWO_TOKEN && t < EOB_TOKEN) {
178 int len = UNCONSTRAINED_NODES - p->skip_eob_node;
179 int bits = v >> (n - len);
180 vp10_write_tree(w, vp10_coef_tree, p->context_tree, bits, len, i);
181 vp10_write_tree(w, vp10_coef_con_tree,
182 vp10_pareto8_full[p->context_tree[PIVOT_NODE] - 1],
183 v, n - len, 0);
184 } else {
185 vp10_write_tree(w, vp10_coef_tree, p->context_tree, v, n, i);
186 }
187
188 if (b->base_val) {
189 const int e = p->extra, l = b->len;
190 #if CONFIG_MISC_FIXES
191 int skip_bits =
192 (b->base_val == CAT6_MIN_VAL) ? TX_SIZES - 1 - tx : 0;
193 #else
194 int skip_bits = 0;
195 #endif
196
197 if (l) {
198 const unsigned char *pb = b->prob;
199 int v = e >> 1;
200 int n = l; /* number of bits in v, assumed nonzero */
201 int i = 0;
202
203 do {
204 const int bb = (v >> --n) & 1;
205 if (skip_bits) {
206 skip_bits--;
207 assert(!bb);
208 } else {
209 vpx_write(w, bb, pb[i >> 1]);
210 }
211 i = b->tree[i + bb];
212 } while (n);
213 }
214
215 vpx_write_bit(w, e & 1);
216 }
217 ++p;
218 }
219
220 *tp = p;
221 }
222
223 static void write_segment_id(vpx_writer *w, const struct segmentation *seg,
224 const struct segmentation_probs *segp,
225 int segment_id) {
226 if (seg->enabled && seg->update_map)
227 vp10_write_tree(w, vp10_segment_tree, segp->tree_probs, segment_id, 3, 0);
228 }
229
230 // This function encodes the reference frame
231 static void write_ref_frames(const VP10_COMMON *cm, const MACROBLOCKD *xd,
232 vpx_writer *w) {
233 const MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
234 const int is_compound = has_second_ref(mbmi);
235 const int segment_id = mbmi->segment_id;
236
237 // If segment level coding of this signal is disabled...
238 // or the segment allows multiple reference frame options
239 if (segfeature_active(&cm->seg, segment_id, SEG_LVL_REF_FRAME)) {
240 assert(!is_compound);
241 assert(mbmi->ref_frame[0] ==
242 get_segdata(&cm->seg, segment_id, SEG_LVL_REF_FRAME));
243 } else {
244 // does the feature use compound prediction or not
245 // (if not specified at the frame/segment level)
246 if (cm->reference_mode == REFERENCE_MODE_SELECT) {
247 vpx_write(w, is_compound, vp10_get_reference_mode_prob(cm, xd));
248 } else {
249 assert(!is_compound == (cm->reference_mode == SINGLE_REFERENCE));
250 }
251
252 if (is_compound) {
253 vpx_write(w, mbmi->ref_frame[0] == GOLDEN_FRAME,
254 vp10_get_pred_prob_comp_ref_p(cm, xd));
255 } else {
256 const int bit0 = mbmi->ref_frame[0] != LAST_FRAME;
257 vpx_write(w, bit0, vp10_get_pred_prob_single_ref_p1(cm, xd));
258 if (bit0) {
259 const int bit1 = mbmi->ref_frame[0] != GOLDEN_FRAME;
260 vpx_write(w, bit1, vp10_get_pred_prob_single_ref_p2(cm, xd));
261 }
262 }
263 }
264 }
265
266 static void pack_inter_mode_mvs(VP10_COMP *cpi, const MODE_INFO *mi,
267 vpx_writer *w) {
268 VP10_COMMON *const cm = &cpi->common;
269 const nmv_context *nmvc = &cm->fc->nmvc;
270 const MACROBLOCK *const x = &cpi->td.mb;
271 const MACROBLOCKD *const xd = &x->e_mbd;
272 const struct segmentation *const seg = &cm->seg;
273 #if CONFIG_MISC_FIXES
274 const struct segmentation_probs *const segp = &cm->fc->seg;
275 #else
276 const struct segmentation_probs *const segp = &cm->segp;
277 #endif
278 const MB_MODE_INFO *const mbmi = &mi->mbmi;
279 const MB_MODE_INFO_EXT *const mbmi_ext = x->mbmi_ext;
280 const PREDICTION_MODE mode = mbmi->mode;
281 const int segment_id = mbmi->segment_id;
282 const BLOCK_SIZE bsize = mbmi->sb_type;
283 const int allow_hp = cm->allow_high_precision_mv;
284 const int is_inter = is_inter_block(mbmi);
285 const int is_compound = has_second_ref(mbmi);
286 int skip, ref;
287
288 if (seg->update_map) {
289 if (seg->temporal_update) {
290 const int pred_flag = mbmi->seg_id_predicted;
291 vpx_prob pred_prob = vp10_get_pred_prob_seg_id(segp, xd);
292 vpx_write(w, pred_flag, pred_prob);
293 if (!pred_flag)
294 write_segment_id(w, seg, segp, segment_id);
295 } else {
296 write_segment_id(w, seg, segp, segment_id);
297 }
298 }
299
300 skip = write_skip(cm, xd, segment_id, mi, w);
301
302 if (!segfeature_active(seg, segment_id, SEG_LVL_REF_FRAME))
303 vpx_write(w, is_inter, vp10_get_intra_inter_prob(cm, xd));
304
305 if (bsize >= BLOCK_8X8 && cm->tx_mode == TX_MODE_SELECT &&
306 !(is_inter && skip)) {
307 write_selected_tx_size(cm, xd, w);
308 }
309
310 if (!is_inter) {
311 if (bsize >= BLOCK_8X8) {
312 write_intra_mode(w, mode, cm->fc->y_mode_prob[size_group_lookup[bsize]]);
313 } else {
314 int idx, idy;
315 const int num_4x4_w = num_4x4_blocks_wide_lookup[bsize];
316 const int num_4x4_h = num_4x4_blocks_high_lookup[bsize];
317 for (idy = 0; idy < 2; idy += num_4x4_h) {
318 for (idx = 0; idx < 2; idx += num_4x4_w) {
319 const PREDICTION_MODE b_mode = mi->bmi[idy * 2 + idx].as_mode;
320 write_intra_mode(w, b_mode, cm->fc->y_mode_prob[0]);
321 }
322 }
323 }
324 write_intra_mode(w, mbmi->uv_mode, cm->fc->uv_mode_prob[mode]);
325 } else {
326 const int mode_ctx = mbmi_ext->mode_context[mbmi->ref_frame[0]];
327 const vpx_prob *const inter_probs = cm->fc->inter_mode_probs[mode_ctx];
328 write_ref_frames(cm, xd, w);
329
330 // If segment skip is not enabled code the mode.
331 if (!segfeature_active(seg, segment_id, SEG_LVL_SKIP)) {
332 if (bsize >= BLOCK_8X8) {
333 write_inter_mode(w, mode, inter_probs);
334 }
335 }
336
337 if (cm->interp_filter == SWITCHABLE) {
338 const int ctx = vp10_get_pred_context_switchable_interp(xd);
339 vp10_write_token(w, vp10_switchable_interp_tree,
340 cm->fc->switchable_interp_prob[ctx],
341 &switchable_interp_encodings[mbmi->interp_filter]);
342 ++cpi->interp_filter_selected[0][mbmi->interp_filter];
343 } else {
344 assert(mbmi->interp_filter == cm->interp_filter);
345 }
346
347 if (bsize < BLOCK_8X8) {
348 const int num_4x4_w = num_4x4_blocks_wide_lookup[bsize];
349 const int num_4x4_h = num_4x4_blocks_high_lookup[bsize];
350 int idx, idy;
351 for (idy = 0; idy < 2; idy += num_4x4_h) {
352 for (idx = 0; idx < 2; idx += num_4x4_w) {
353 const int j = idy * 2 + idx;
354 const PREDICTION_MODE b_mode = mi->bmi[j].as_mode;
355 write_inter_mode(w, b_mode, inter_probs);
356 if (b_mode == NEWMV) {
357 for (ref = 0; ref < 1 + is_compound; ++ref)
358 vp10_encode_mv(cpi, w, &mi->bmi[j].as_mv[ref].as_mv,
359 &mbmi_ext->ref_mvs[mbmi->ref_frame[ref]][0].as_mv,
360 nmvc, allow_hp);
361 }
362 }
363 }
364 } else {
365 if (mode == NEWMV) {
366 for (ref = 0; ref < 1 + is_compound; ++ref)
367 vp10_encode_mv(cpi, w, &mbmi->mv[ref].as_mv,
368 &mbmi_ext->ref_mvs[mbmi->ref_frame[ref]][0].as_mv, nmvc,
369 allow_hp);
370 }
371 }
372 }
373 }
374
375 static void write_mb_modes_kf(const VP10_COMMON *cm, const MACROBLOCKD *xd,
376 MODE_INFO **mi_8x8, vpx_writer *w) {
377 const struct segmentation *const seg = &cm->seg;
378 #if CONFIG_MISC_FIXES
379 const struct segmentation_probs *const segp = &cm->fc->seg;
380 #else
381 const struct segmentation_probs *const segp = &cm->segp;
382 #endif
383 const MODE_INFO *const mi = mi_8x8[0];
384 const MODE_INFO *const above_mi = xd->above_mi;
385 const MODE_INFO *const left_mi = xd->left_mi;
386 const MB_MODE_INFO *const mbmi = &mi->mbmi;
387 const BLOCK_SIZE bsize = mbmi->sb_type;
388
389 if (seg->update_map)
390 write_segment_id(w, seg, segp, mbmi->segment_id);
391
392 write_skip(cm, xd, mbmi->segment_id, mi, w);
393
394 if (bsize >= BLOCK_8X8 && cm->tx_mode == TX_MODE_SELECT)
395 write_selected_tx_size(cm, xd, w);
396
397 if (bsize >= BLOCK_8X8) {
398 write_intra_mode(w, mbmi->mode,
399 get_y_mode_probs(cm, mi, above_mi, left_mi, 0));
400 } else {
401 const int num_4x4_w = num_4x4_blocks_wide_lookup[bsize];
402 const int num_4x4_h = num_4x4_blocks_high_lookup[bsize];
403 int idx, idy;
404
405 for (idy = 0; idy < 2; idy += num_4x4_h) {
406 for (idx = 0; idx < 2; idx += num_4x4_w) {
407 const int block = idy * 2 + idx;
408 write_intra_mode(w, mi->bmi[block].as_mode,
409 get_y_mode_probs(cm, mi, above_mi, left_mi, block));
410 }
411 }
412 }
413
414 write_intra_mode(w, mbmi->uv_mode, cm->fc->uv_mode_prob[mbmi->mode]);
415 }
416
417 static void write_modes_b(VP10_COMP *cpi, const TileInfo *const tile,
418 vpx_writer *w, TOKENEXTRA **tok,
419 const TOKENEXTRA *const tok_end,
420 int mi_row, int mi_col) {
421 const VP10_COMMON *const cm = &cpi->common;
422 MACROBLOCKD *const xd = &cpi->td.mb.e_mbd;
423 MODE_INFO *m;
424 int plane;
425
426 xd->mi = cm->mi_grid_visible + (mi_row * cm->mi_stride + mi_col);
427 m = xd->mi[0];
428
429 cpi->td.mb.mbmi_ext = cpi->mbmi_ext_base + (mi_row * cm->mi_cols + mi_col);
430
431 set_mi_row_col(xd, tile,
432 mi_row, num_8x8_blocks_high_lookup[m->mbmi.sb_type],
433 mi_col, num_8x8_blocks_wide_lookup[m->mbmi.sb_type],
434 cm->mi_rows, cm->mi_cols);
435 if (frame_is_intra_only(cm)) {
436 write_mb_modes_kf(cm, xd, xd->mi, w);
437 } else {
438 pack_inter_mode_mvs(cpi, m, w);
439 }
440
441 if (!m->mbmi.skip) {
442 assert(*tok < tok_end);
443 for (plane = 0; plane < MAX_MB_PLANE; ++plane) {
444 TX_SIZE tx = plane ? get_uv_tx_size(&m->mbmi, &xd->plane[plane])
445 : m->mbmi.tx_size;
446 pack_mb_tokens(w, tok, tok_end, cm->bit_depth, tx);
447 assert(*tok < tok_end && (*tok)->token == EOSB_TOKEN);
448 (*tok)++;
449 }
450 }
451 }
452
453 static void write_partition(const VP10_COMMON *const cm,
454 const MACROBLOCKD *const xd,
455 int hbs, int mi_row, int mi_col,
456 PARTITION_TYPE p, BLOCK_SIZE bsize, vpx_writer *w) {
457 const int ctx = partition_plane_context(xd, mi_row, mi_col, bsize);
458 const vpx_prob *const probs = cm->fc->partition_prob[ctx];
459 const int has_rows = (mi_row + hbs) < cm->mi_rows;
460 const int has_cols = (mi_col + hbs) < cm->mi_cols;
461
462 if (has_rows && has_cols) {
463 vp10_write_token(w, vp10_partition_tree, probs, &partition_encodings[p]);
464 } else if (!has_rows && has_cols) {
465 assert(p == PARTITION_SPLIT || p == PARTITION_HORZ);
466 vpx_write(w, p == PARTITION_SPLIT, probs[1]);
467 } else if (has_rows && !has_cols) {
468 assert(p == PARTITION_SPLIT || p == PARTITION_VERT);
469 vpx_write(w, p == PARTITION_SPLIT, probs[2]);
470 } else {
471 assert(p == PARTITION_SPLIT);
472 }
473 }
474
475 static void write_modes_sb(VP10_COMP *cpi,
476 const TileInfo *const tile, vpx_writer *w,
477 TOKENEXTRA **tok, const TOKENEXTRA *const tok_end,
478 int mi_row, int mi_col, BLOCK_SIZE bsize) {
479 const VP10_COMMON *const cm = &cpi->common;
480 MACROBLOCKD *const xd = &cpi->td.mb.e_mbd;
481
482 const int bsl = b_width_log2_lookup[bsize];
483 const int bs = (1 << bsl) / 4;
484 PARTITION_TYPE partition;
485 BLOCK_SIZE subsize;
486 const MODE_INFO *m = NULL;
487
488 if (mi_row >= cm->mi_rows || mi_col >= cm->mi_cols)
489 return;
490
491 m = cm->mi_grid_visible[mi_row * cm->mi_stride + mi_col];
492
493 partition = partition_lookup[bsl][m->mbmi.sb_type];
494 write_partition(cm, xd, bs, mi_row, mi_col, partition, bsize, w);
495 subsize = get_subsize(bsize, partition);
496 if (subsize < BLOCK_8X8) {
497 write_modes_b(cpi, tile, w, tok, tok_end, mi_row, mi_col);
498 } else {
499 switch (partition) {
500 case PARTITION_NONE:
501 write_modes_b(cpi, tile, w, tok, tok_end, mi_row, mi_col);
502 break;
503 case PARTITION_HORZ:
504 write_modes_b(cpi, tile, w, tok, tok_end, mi_row, mi_col);
505 if (mi_row + bs < cm->mi_rows)
506 write_modes_b(cpi, tile, w, tok, tok_end, mi_row + bs, mi_col);
507 break;
508 case PARTITION_VERT:
509 write_modes_b(cpi, tile, w, tok, tok_end, mi_row, mi_col);
510 if (mi_col + bs < cm->mi_cols)
511 write_modes_b(cpi, tile, w, tok, tok_end, mi_row, mi_col + bs);
512 break;
513 case PARTITION_SPLIT:
514 write_modes_sb(cpi, tile, w, tok, tok_end, mi_row, mi_col, subsize);
515 write_modes_sb(cpi, tile, w, tok, tok_end, mi_row, mi_col + bs,
516 subsize);
517 write_modes_sb(cpi, tile, w, tok, tok_end, mi_row + bs, mi_col,
518 subsize);
519 write_modes_sb(cpi, tile, w, tok, tok_end, mi_row + bs, mi_col + bs,
520 subsize);
521 break;
522 default:
523 assert(0);
524 }
525 }
526
527 // update partition context
528 if (bsize >= BLOCK_8X8 &&
529 (bsize == BLOCK_8X8 || partition != PARTITION_SPLIT))
530 update_partition_context(xd, mi_row, mi_col, subsize, bsize);
531 }
532
533 static void write_modes(VP10_COMP *cpi,
534 const TileInfo *const tile, vpx_writer *w,
535 TOKENEXTRA **tok, const TOKENEXTRA *const tok_end) {
536 MACROBLOCKD *const xd = &cpi->td.mb.e_mbd;
537 int mi_row, mi_col;
538
539 for (mi_row = tile->mi_row_start; mi_row < tile->mi_row_end;
540 mi_row += MI_BLOCK_SIZE) {
541 vp10_zero(xd->left_seg_context);
542 for (mi_col = tile->mi_col_start; mi_col < tile->mi_col_end;
543 mi_col += MI_BLOCK_SIZE)
544 write_modes_sb(cpi, tile, w, tok, tok_end, mi_row, mi_col,
545 BLOCK_64X64);
546 }
547 }
548
549 static void build_tree_distribution(VP10_COMP *cpi, TX_SIZE tx_size,
550 vp10_coeff_stats *coef_branch_ct,
551 vp10_coeff_probs_model *coef_probs) {
552 vp10_coeff_count *coef_counts = cpi->td.rd_counts.coef_counts[tx_size];
553 unsigned int (*eob_branch_ct)[REF_TYPES][COEF_BANDS][COEFF_CONTEXTS] =
554 cpi->common.counts.eob_branch[tx_size];
555 int i, j, k, l, m;
556
557 for (i = 0; i < PLANE_TYPES; ++i) {
558 for (j = 0; j < REF_TYPES; ++j) {
559 for (k = 0; k < COEF_BANDS; ++k) {
560 for (l = 0; l < BAND_COEFF_CONTEXTS(k); ++l) {
561 vp10_tree_probs_from_distribution(vp10_coef_tree,
562 coef_branch_ct[i][j][k][l],
563 coef_counts[i][j][k][l]);
564 coef_branch_ct[i][j][k][l][0][1] = eob_branch_ct[i][j][k][l] -
565 coef_branch_ct[i][j][k][l][0][0];
566 for (m = 0; m < UNCONSTRAINED_NODES; ++m)
567 coef_probs[i][j][k][l][m] = get_binary_prob(
568 coef_branch_ct[i][j][k][l][m][0],
569 coef_branch_ct[i][j][k][l][m][1]);
570 }
571 }
572 }
573 }
574 }
575
576 static void update_coef_probs_common(vpx_writer* const bc, VP10_COMP *cpi,
577 TX_SIZE tx_size,
578 vp10_coeff_stats *frame_branch_ct,
579 vp10_coeff_probs_model *new_coef_probs) {
580 vp10_coeff_probs_model *old_coef_probs = cpi->common.fc->coef_probs[tx_size];
581 const vpx_prob upd = DIFF_UPDATE_PROB;
582 const int entropy_nodes_update = UNCONSTRAINED_NODES;
583 int i, j, k, l, t;
584 int stepsize = cpi->sf.coeff_prob_appx_step;
585
586 switch (cpi->sf.use_fast_coef_updates) {
587 case TWO_LOOP: {
588 /* dry run to see if there is any update at all needed */
589 int savings = 0;
590 int update[2] = {0, 0};
591 for (i = 0; i < PLANE_TYPES; ++i) {
592 for (j = 0; j < REF_TYPES; ++j) {
593 for (k = 0; k < COEF_BANDS; ++k) {
594 for (l = 0; l < BAND_COEFF_CONTEXTS(k); ++l) {
595 for (t = 0; t < entropy_nodes_update; ++t) {
596 vpx_prob newp = new_coef_probs[i][j][k][l][t];
597 const vpx_prob oldp = old_coef_probs[i][j][k][l][t];
598 int s;
599 int u = 0;
600 if (t == PIVOT_NODE)
601 s = vp10_prob_diff_update_savings_search_model(
602 frame_branch_ct[i][j][k][l][0],
603 old_coef_probs[i][j][k][l], &newp, upd, stepsize);
604 else
605 s = vp10_prob_diff_update_savings_search(
606 frame_branch_ct[i][j][k][l][t], oldp, &newp, upd);
607 if (s > 0 && newp != oldp)
608 u = 1;
609 if (u)
610 savings += s - (int)(vp10_cost_zero(upd));
611 else
612 savings -= (int)(vp10_cost_zero(upd));
613 update[u]++;
614 }
615 }
616 }
617 }
618 }
619
620 // printf("Update %d %d, savings %d\n", update[0], update[1], savings);
621 /* Is coef updated at all */
622 if (update[1] == 0 || savings < 0) {
623 vpx_write_bit(bc, 0);
624 return;
625 }
626 vpx_write_bit(bc, 1);
627 for (i = 0; i < PLANE_TYPES; ++i) {
628 for (j = 0; j < REF_TYPES; ++j) {
629 for (k = 0; k < COEF_BANDS; ++k) {
630 for (l = 0; l < BAND_COEFF_CONTEXTS(k); ++l) {
631 // calc probs and branch cts for this frame only
632 for (t = 0; t < entropy_nodes_update; ++t) {
633 vpx_prob newp = new_coef_probs[i][j][k][l][t];
634 vpx_prob *oldp = old_coef_probs[i][j][k][l] + t;
635 const vpx_prob upd = DIFF_UPDATE_PROB;
636 int s;
637 int u = 0;
638 if (t == PIVOT_NODE)
639 s = vp10_prob_diff_update_savings_search_model(
640 frame_branch_ct[i][j][k][l][0],
641 old_coef_probs[i][j][k][l], &newp, upd, stepsize);
642 else
643 s = vp10_prob_diff_update_savings_search(
644 frame_branch_ct[i][j][k][l][t],
645 *oldp, &newp, upd);
646 if (s > 0 && newp != *oldp)
647 u = 1;
648 vpx_write(bc, u, upd);
649 if (u) {
650 /* send/use new probability */
651 vp10_write_prob_diff_update(bc, newp, *oldp);
652 *oldp = newp;
653 }
654 }
655 }
656 }
657 }
658 }
659 return;
660 }
661
662 case ONE_LOOP_REDUCED: {
663 int updates = 0;
664 int noupdates_before_first = 0;
665 for (i = 0; i < PLANE_TYPES; ++i) {
666 for (j = 0; j < REF_TYPES; ++j) {
667 for (k = 0; k < COEF_BANDS; ++k) {
668 for (l = 0; l < BAND_COEFF_CONTEXTS(k); ++l) {
669 // calc probs and branch cts for this frame only
670 for (t = 0; t < entropy_nodes_update; ++t) {
671 vpx_prob newp = new_coef_probs[i][j][k][l][t];
672 vpx_prob *oldp = old_coef_probs[i][j][k][l] + t;
673 int s;
674 int u = 0;
675
676 if (t == PIVOT_NODE) {
677 s = vp10_prob_diff_update_savings_search_model(
678 frame_branch_ct[i][j][k][l][0],
679 old_coef_probs[i][j][k][l], &newp, upd, stepsize);
680 } else {
681 s = vp10_prob_diff_update_savings_search(
682 frame_branch_ct[i][j][k][l][t],
683 *oldp, &newp, upd);
684 }
685
686 if (s > 0 && newp != *oldp)
687 u = 1;
688 updates += u;
689 if (u == 0 && updates == 0) {
690 noupdates_before_first++;
691 continue;
692 }
693 if (u == 1 && updates == 1) {
694 int v;
695 // first update
696 vpx_write_bit(bc, 1);
697 for (v = 0; v < noupdates_before_first; ++v)
698 vpx_write(bc, 0, upd);
699 }
700 vpx_write(bc, u, upd);
701 if (u) {
702 /* send/use new probability */
703 vp10_write_prob_diff_update(bc, newp, *oldp);
704 *oldp = newp;
705 }
706 }
707 }
708 }
709 }
710 }
711 if (updates == 0) {
712 vpx_write_bit(bc, 0); // no updates
713 }
714 return;
715 }
716 default:
717 assert(0);
718 }
719 }
720
721 static void update_coef_probs(VP10_COMP *cpi, vpx_writer* w) {
722 const TX_MODE tx_mode = cpi->common.tx_mode;
723 const TX_SIZE max_tx_size = tx_mode_to_biggest_tx_size[tx_mode];
724 TX_SIZE tx_size;
725 for (tx_size = TX_4X4; tx_size <= max_tx_size; ++tx_size) {
726 vp10_coeff_stats frame_branch_ct[PLANE_TYPES];
727 vp10_coeff_probs_model frame_coef_probs[PLANE_TYPES];
728 if (cpi->td.counts->tx.tx_totals[tx_size] <= 20 ||
729 (tx_size >= TX_16X16 && cpi->sf.tx_size_search_method == USE_TX_8X8)) {
730 vpx_write_bit(w, 0);
731 } else {
732 build_tree_distribution(cpi, tx_size, frame_branch_ct,
733 frame_coef_probs);
734 update_coef_probs_common(w, cpi, tx_size, frame_branch_ct,
735 frame_coef_probs);
736 }
737 }
738 }
739
740 static void encode_loopfilter(struct loopfilter *lf,
741 struct vpx_write_bit_buffer *wb) {
742 int i;
743
744 // Encode the loop filter level and type
745 vpx_wb_write_literal(wb, lf->filter_level, 6);
746 vpx_wb_write_literal(wb, lf->sharpness_level, 3);
747
748 // Write out loop filter deltas applied at the MB level based on mode or
749 // ref frame (if they are enabled).
750 vpx_wb_write_bit(wb, lf->mode_ref_delta_enabled);
751
752 if (lf->mode_ref_delta_enabled) {
753 vpx_wb_write_bit(wb, lf->mode_ref_delta_update);
754 if (lf->mode_ref_delta_update) {
755 for (i = 0; i < MAX_REF_FRAMES; i++) {
756 const int delta = lf->ref_deltas[i];
757 const int changed = delta != lf->last_ref_deltas[i];
758 vpx_wb_write_bit(wb, changed);
759 if (changed) {
760 lf->last_ref_deltas[i] = delta;
761 vpx_wb_write_inv_signed_literal(wb, delta, 6);
762 }
763 }
764
765 for (i = 0; i < MAX_MODE_LF_DELTAS; i++) {
766 const int delta = lf->mode_deltas[i];
767 const int changed = delta != lf->last_mode_deltas[i];
768 vpx_wb_write_bit(wb, changed);
769 if (changed) {
770 lf->last_mode_deltas[i] = delta;
771 vpx_wb_write_inv_signed_literal(wb, delta, 6);
772 }
773 }
774 }
775 }
776 }
777
778 static void write_delta_q(struct vpx_write_bit_buffer *wb, int delta_q) {
779 if (delta_q != 0) {
780 vpx_wb_write_bit(wb, 1);
781 vpx_wb_write_inv_signed_literal(wb, delta_q, CONFIG_MISC_FIXES ? 6 : 4);
782 } else {
783 vpx_wb_write_bit(wb, 0);
784 }
785 }
786
787 static void encode_quantization(const VP10_COMMON *const cm,
788 struct vpx_write_bit_buffer *wb) {
789 vpx_wb_write_literal(wb, cm->base_qindex, QINDEX_BITS);
790 write_delta_q(wb, cm->y_dc_delta_q);
791 write_delta_q(wb, cm->uv_dc_delta_q);
792 write_delta_q(wb, cm->uv_ac_delta_q);
793 }
794
795 static void encode_segmentation(VP10_COMMON *cm, MACROBLOCKD *xd,
796 struct vpx_write_bit_buffer *wb) {
797 int i, j;
798
799 const struct segmentation *seg = &cm->seg;
800 #if !CONFIG_MISC_FIXES
801 const struct segmentation_probs *segp = &cm->segp;
802 #endif
803
804 vpx_wb_write_bit(wb, seg->enabled);
805 if (!seg->enabled)
806 return;
807
808 // Segmentation map
809 if (!frame_is_intra_only(cm) && !cm->error_resilient_mode) {
810 vpx_wb_write_bit(wb, seg->update_map);
811 } else {
812 assert(seg->update_map == 1);
813 }
814 if (seg->update_map) {
815 // Select the coding strategy (temporal or spatial)
816 vp10_choose_segmap_coding_method(cm, xd);
817 #if !CONFIG_MISC_FIXES
818 // Write out probabilities used to decode unpredicted macro-block segments
819 for (i = 0; i < SEG_TREE_PROBS; i++) {
820 const int prob = segp->tree_probs[i];
821 const int update = prob != MAX_PROB;
822 vpx_wb_write_bit(wb, update);
823 if (update)
824 vpx_wb_write_literal(wb, prob, 8);
825 }
826 #endif
827
828 // Write out the chosen coding method.
829 if (!frame_is_intra_only(cm) && !cm->error_resilient_mode) {
830 vpx_wb_write_bit(wb, seg->temporal_update);
831 } else {
832 assert(seg->temporal_update == 0);
833 }
834
835 #if !CONFIG_MISC_FIXES
836 if (seg->temporal_update) {
837 for (i = 0; i < PREDICTION_PROBS; i++) {
838 const int prob = segp->pred_probs[i];
839 const int update = prob != MAX_PROB;
840 vpx_wb_write_bit(wb, update);
841 if (update)
842 vpx_wb_write_literal(wb, prob, 8);
843 }
844 }
845 #endif
846 }
847
848 // Segmentation data
849 vpx_wb_write_bit(wb, seg->update_data);
850 if (seg->update_data) {
851 vpx_wb_write_bit(wb, seg->abs_delta);
852
853 for (i = 0; i < MAX_SEGMENTS; i++) {
854 for (j = 0; j < SEG_LVL_MAX; j++) {
855 const int active = segfeature_active(seg, i, j);
856 vpx_wb_write_bit(wb, active);
857 if (active) {
858 const int data = get_segdata(seg, i, j);
859 const int data_max = vp10_seg_feature_data_max(j);
860
861 if (vp10_is_segfeature_signed(j)) {
862 encode_unsigned_max(wb, abs(data), data_max);
863 vpx_wb_write_bit(wb, data < 0);
864 } else {
865 encode_unsigned_max(wb, data, data_max);
866 }
867 }
868 }
869 }
870 }
871 }
872
873 #if CONFIG_MISC_FIXES
874 static void update_seg_probs(VP10_COMP *cpi, vpx_writer *w) {
875 VP10_COMMON *cm = &cpi->common;
876
877 if (!cpi->common.seg.enabled)
878 return;
879
880 if (cpi->common.seg.temporal_update) {
881 int i;
882
883 for (i = 0; i < PREDICTION_PROBS; i++)
884 vp10_cond_prob_diff_update(w, &cm->fc->seg.pred_probs[i],
885 cm->counts.seg.pred[i]);
886
887 prob_diff_update(vp10_segment_tree, cm->fc->seg.tree_probs,
888 cm->counts.seg.tree_mispred, MAX_SEGMENTS, w);
889 } else {
890 prob_diff_update(vp10_segment_tree, cm->fc->seg.tree_probs,
891 cm->counts.seg.tree_total, MAX_SEGMENTS, w);
892 }
893 }
894
895 static void write_txfm_mode(TX_MODE mode, struct vpx_write_bit_buffer *wb) {
896 vpx_wb_write_bit(wb, mode == TX_MODE_SELECT);
897 if (mode != TX_MODE_SELECT)
898 vpx_wb_write_literal(wb, mode, 2);
899 }
900 #endif
901
902 static void update_txfm_probs(VP10_COMMON *cm, vpx_writer *w,
903 FRAME_COUNTS *counts) {
904 #if !CONFIG_MISC_FIXES
905 // Mode
906 vpx_write_literal(w, VPXMIN(cm->tx_mode, ALLOW_32X32), 2);
907 if (cm->tx_mode >= ALLOW_32X32)
908 vpx_write_bit(w, cm->tx_mode == TX_MODE_SELECT);
909
910 // Probabilities
911 #endif
912
913 if (cm->tx_mode == TX_MODE_SELECT) {
914 int i, j;
915 unsigned int ct_8x8p[TX_SIZES - 3][2];
916 unsigned int ct_16x16p[TX_SIZES - 2][2];
917 unsigned int ct_32x32p[TX_SIZES - 1][2];
918
919
920 for (i = 0; i < TX_SIZE_CONTEXTS; i++) {
921 vp10_tx_counts_to_branch_counts_8x8(counts->tx.p8x8[i], ct_8x8p);
922 for (j = 0; j < TX_SIZES - 3; j++)
923 vp10_cond_prob_diff_update(w, &cm->fc->tx_probs.p8x8[i][j], ct_8x8p[j]);
924 }
925
926 for (i = 0; i < TX_SIZE_CONTEXTS; i++) {
927 vp10_tx_counts_to_branch_counts_16x16(counts->tx.p16x16[i], ct_16x16p);
928 for (j = 0; j < TX_SIZES - 2; j++)
929 vp10_cond_prob_diff_update(w, &cm->fc->tx_probs.p16x16[i][j],
930 ct_16x16p[j]);
931 }
932
933 for (i = 0; i < TX_SIZE_CONTEXTS; i++) {
934 vp10_tx_counts_to_branch_counts_32x32(counts->tx.p32x32[i], ct_32x32p);
935 for (j = 0; j < TX_SIZES - 1; j++)
936 vp10_cond_prob_diff_update(w, &cm->fc->tx_probs.p32x32[i][j],
937 ct_32x32p[j]);
938 }
939 }
940 }
941
942 static void write_interp_filter(INTERP_FILTER filter,
943 struct vpx_write_bit_buffer *wb) {
944 vpx_wb_write_bit(wb, filter == SWITCHABLE);
945 if (filter != SWITCHABLE)
946 vpx_wb_write_literal(wb, filter, 2);
947 }
948
949 static void fix_interp_filter(VP10_COMMON *cm, FRAME_COUNTS *counts) {
950 if (cm->interp_filter == SWITCHABLE) {
951 // Check to see if only one of the filters is actually used
952 int count[SWITCHABLE_FILTERS];
953 int i, j, c = 0;
954 for (i = 0; i < SWITCHABLE_FILTERS; ++i) {
955 count[i] = 0;
956 for (j = 0; j < SWITCHABLE_FILTER_CONTEXTS; ++j)
957 count[i] += counts->switchable_interp[j][i];
958 c += (count[i] > 0);
959 }
960 if (c == 1) {
961 // Only one filter is used. So set the filter at frame level
962 for (i = 0; i < SWITCHABLE_FILTERS; ++i) {
963 if (count[i]) {
964 cm->interp_filter = i;
965 break;
966 }
967 }
968 }
969 }
970 }
971
972 static void write_tile_info(const VP10_COMMON *const cm,
973 struct vpx_write_bit_buffer *wb) {
974 int min_log2_tile_cols, max_log2_tile_cols, ones;
975 vp10_get_tile_n_bits(cm->mi_cols, &min_log2_tile_cols, &max_log2_tile_cols);
976
977 // columns
978 ones = cm->log2_tile_cols - min_log2_tile_cols;
979 while (ones--)
980 vpx_wb_write_bit(wb, 1);
981
982 if (cm->log2_tile_cols < max_log2_tile_cols)
983 vpx_wb_write_bit(wb, 0);
984
985 // rows
986 vpx_wb_write_bit(wb, cm->log2_tile_rows != 0);
987 if (cm->log2_tile_rows != 0)
988 vpx_wb_write_bit(wb, cm->log2_tile_rows != 1);
989 }
990
991 static int get_refresh_mask(VP10_COMP *cpi) {
992 if (vp10_preserve_existing_gf(cpi)) {
993 // We have decided to preserve the previously existing golden frame as our
994 // new ARF frame. However, in the short term we leave it in the GF slot and,
995 // if we're updating the GF with the current decoded frame, we save it
996 // instead to the ARF slot.
997 // Later, in the function vp10_encoder.c:vp10_update_reference_frames() we
998 // will swap gld_fb_idx and alt_fb_idx to achieve our objective. We do it
999 // there so that it can be done outside of the recode loop.
1000 // Note: This is highly specific to the use of ARF as a forward reference,
1001 // and this needs to be generalized as other uses are implemented
1002 // (like RTC/temporal scalability).
1003 return (cpi->refresh_last_frame << cpi->lst_fb_idx) |
1004 (cpi->refresh_golden_frame << cpi->alt_fb_idx);
1005 } else {
1006 int arf_idx = cpi->alt_fb_idx;
1007 if ((cpi->oxcf.pass == 2) && cpi->multi_arf_allowed) {
1008 const GF_GROUP *const gf_group = &cpi->twopass.gf_group;
1009 arf_idx = gf_group->arf_update_idx[gf_group->index];
1010 }
1011 return (cpi->refresh_last_frame << cpi->lst_fb_idx) |
1012 (cpi->refresh_golden_frame << cpi->gld_fb_idx) |
1013 (cpi->refresh_alt_ref_frame << arf_idx);
1014 }
1015 }
1016
1017 static size_t encode_tiles(VP10_COMP *cpi, uint8_t *data_ptr,
1018 unsigned int *max_tile_sz) {
1019 VP10_COMMON *const cm = &cpi->common;
1020 vpx_writer residual_bc;
1021 int tile_row, tile_col;
1022 TOKENEXTRA *tok_end;
1023 size_t total_size = 0;
1024 const int tile_cols = 1 << cm->log2_tile_cols;
1025 const int tile_rows = 1 << cm->log2_tile_rows;
1026 unsigned int max_tile = 0;
1027
1028 memset(cm->above_seg_context, 0,
1029 sizeof(*cm->above_seg_context) * mi_cols_aligned_to_sb(cm->mi_cols));
1030
1031 for (tile_row = 0; tile_row < tile_rows; tile_row++) {
1032 for (tile_col = 0; tile_col < tile_cols; tile_col++) {
1033 int tile_idx = tile_row * tile_cols + tile_col;
1034 TOKENEXTRA *tok = cpi->tile_tok[tile_row][tile_col];
1035
1036 tok_end = cpi->tile_tok[tile_row][tile_col] +
1037 cpi->tok_count[tile_row][tile_col];
1038
1039 if (tile_col < tile_cols - 1 || tile_row < tile_rows - 1)
1040 vpx_start_encode(&residual_bc, data_ptr + total_size + 4);
1041 else
1042 vpx_start_encode(&residual_bc, data_ptr + total_size);
1043
1044 write_modes(cpi, &cpi->tile_data[tile_idx].tile_info,
1045 &residual_bc, &tok, tok_end);
1046 assert(tok == tok_end);
1047 vpx_stop_encode(&residual_bc);
1048 if (tile_col < tile_cols - 1 || tile_row < tile_rows - 1) {
1049 unsigned int tile_sz;
1050
1051 // size of this tile
1052 assert(residual_bc.pos > 0);
1053 tile_sz = residual_bc.pos - CONFIG_MISC_FIXES;
1054 mem_put_le32(data_ptr + total_size, tile_sz);
1055 max_tile = max_tile > tile_sz ? max_tile : tile_sz;
1056 total_size += 4;
1057 }
1058
1059 total_size += residual_bc.pos;
1060 }
1061 }
1062 *max_tile_sz = max_tile;
1063
1064 return total_size;
1065 }
1066
1067 static void write_render_size(const VP10_COMMON *cm,
1068 struct vpx_write_bit_buffer *wb) {
1069 const int scaling_active = cm->width != cm->render_width ||
1070 cm->height != cm->render_height;
1071 vpx_wb_write_bit(wb, scaling_active);
1072 if (scaling_active) {
1073 vpx_wb_write_literal(wb, cm->render_width - 1, 16);
1074 vpx_wb_write_literal(wb, cm->render_height - 1, 16);
1075 }
1076 }
1077
1078 static void write_frame_size(const VP10_COMMON *cm,
1079 struct vpx_write_bit_buffer *wb) {
1080 vpx_wb_write_literal(wb, cm->width - 1, 16);
1081 vpx_wb_write_literal(wb, cm->height - 1, 16);
1082
1083 write_render_size(cm, wb);
1084 }
1085
1086 static void write_frame_size_with_refs(VP10_COMP *cpi,
1087 struct vpx_write_bit_buffer *wb) {
1088 VP10_COMMON *const cm = &cpi->common;
1089 int found = 0;
1090
1091 MV_REFERENCE_FRAME ref_frame;
1092 for (ref_frame = LAST_FRAME; ref_frame <= ALTREF_FRAME; ++ref_frame) {
1093 YV12_BUFFER_CONFIG *cfg = get_ref_frame_buffer(cpi, ref_frame);
1094
1095 if (cfg != NULL) {
1096 found = cm->width == cfg->y_crop_width &&
1097 cm->height == cfg->y_crop_height;
1098 #if CONFIG_MISC_FIXES
1099 found &= cm->render_width == cfg->render_width &&
1100 cm->render_height == cfg->render_height;
1101 #endif
1102 }
1103 vpx_wb_write_bit(wb, found);
1104 if (found) {
1105 break;
1106 }
1107 }
1108
1109 if (!found) {
1110 vpx_wb_write_literal(wb, cm->width - 1, 16);
1111 vpx_wb_write_literal(wb, cm->height - 1, 16);
1112
1113 #if CONFIG_MISC_FIXES
1114 write_render_size(cm, wb);
1115 #endif
1116 }
1117
1118 #if !CONFIG_MISC_FIXES
1119 write_render_size(cm, wb);
1120 #endif
1121 }
1122
1123 static void write_sync_code(struct vpx_write_bit_buffer *wb) {
1124 vpx_wb_write_literal(wb, VP10_SYNC_CODE_0, 8);
1125 vpx_wb_write_literal(wb, VP10_SYNC_CODE_1, 8);
1126 vpx_wb_write_literal(wb, VP10_SYNC_CODE_2, 8);
1127 }
1128
1129 static void write_profile(BITSTREAM_PROFILE profile,
1130 struct vpx_write_bit_buffer *wb) {
1131 switch (profile) {
1132 case PROFILE_0:
1133 vpx_wb_write_literal(wb, 0, 2);
1134 break;
1135 case PROFILE_1:
1136 vpx_wb_write_literal(wb, 2, 2);
1137 break;
1138 case PROFILE_2:
1139 vpx_wb_write_literal(wb, 1, 2);
1140 break;
1141 case PROFILE_3:
1142 vpx_wb_write_literal(wb, 6, 3);
1143 break;
1144 default:
1145 assert(0);
1146 }
1147 }
1148
1149 static void write_bitdepth_colorspace_sampling(
1150 VP10_COMMON *const cm, struct vpx_write_bit_buffer *wb) {
1151 if (cm->profile >= PROFILE_2) {
1152 assert(cm->bit_depth > VPX_BITS_8);
1153 vpx_wb_write_bit(wb, cm->bit_depth == VPX_BITS_10 ? 0 : 1);
1154 }
1155 vpx_wb_write_literal(wb, cm->color_space, 3);
1156 if (cm->color_space != VPX_CS_SRGB) {
1157 // 0: [16, 235] (i.e. xvYCC), 1: [0, 255]
1158 vpx_wb_write_bit(wb, cm->color_range);
1159 if (cm->profile == PROFILE_1 || cm->profile == PROFILE_3) {
1160 assert(cm->subsampling_x != 1 || cm->subsampling_y != 1);
1161 vpx_wb_write_bit(wb, cm->subsampling_x);
1162 vpx_wb_write_bit(wb, cm->subsampling_y);
1163 vpx_wb_write_bit(wb, 0); // unused
1164 } else {
1165 assert(cm->subsampling_x == 1 && cm->subsampling_y == 1);
1166 }
1167 } else {
1168 assert(cm->profile == PROFILE_1 || cm->profile == PROFILE_3);
1169 vpx_wb_write_bit(wb, 0); // unused
1170 }
1171 }
1172
1173 static void write_uncompressed_header(VP10_COMP *cpi,
1174 struct vpx_write_bit_buffer *wb) {
1175 VP10_COMMON *const cm = &cpi->common;
1176 MACROBLOCKD *const xd = &cpi->td.mb.e_mbd;
1177
1178 vpx_wb_write_literal(wb, VP9_FRAME_MARKER, 2);
1179
1180 write_profile(cm->profile, wb);
1181
1182 vpx_wb_write_bit(wb, 0); // show_existing_frame
1183 vpx_wb_write_bit(wb, cm->frame_type);
1184 vpx_wb_write_bit(wb, cm->show_frame);
1185 vpx_wb_write_bit(wb, cm->error_resilient_mode);
1186
1187 if (cm->frame_type == KEY_FRAME) {
1188 write_sync_code(wb);
1189 write_bitdepth_colorspace_sampling(cm, wb);
1190 write_frame_size(cm, wb);
1191 } else {
1192 if (!cm->show_frame)
1193 vpx_wb_write_bit(wb, cm->intra_only);
1194
1195 if (!cm->error_resilient_mode) {
1196 #if CONFIG_MISC_FIXES
1197 if (cm->intra_only) {
1198 vpx_wb_write_bit(wb,
1199 cm->reset_frame_context == RESET_FRAME_CONTEXT_ALL);
1200 } else {
1201 vpx_wb_write_bit(wb,
1202 cm->reset_frame_context != RESET_FRAME_CONTEXT_NONE);
1203 if (cm->reset_frame_context != RESET_FRAME_CONTEXT_NONE)
1204 vpx_wb_write_bit(wb,
1205 cm->reset_frame_context == RESET_FRAME_CONTEXT_ALL);
1206 }
1207 #else
1208 static const int reset_frame_context_conv_tbl[3] = { 0, 2, 3 };
1209
1210 vpx_wb_write_literal(wb,
1211 reset_frame_context_conv_tbl[cm->reset_frame_context], 2);
1212 #endif
1213 }
1214
1215 if (cm->intra_only) {
1216 write_sync_code(wb);
1217
1218 #if CONFIG_MISC_FIXES
1219 write_bitdepth_colorspace_sampling(cm, wb);
1220 #else
1221 // Note for profile 0, 420 8bpp is assumed.
1222 if (cm->profile > PROFILE_0) {
1223 write_bitdepth_colorspace_sampling(cm, wb);
1224 }
1225 #endif
1226
1227 vpx_wb_write_literal(wb, get_refresh_mask(cpi), REF_FRAMES);
1228 write_frame_size(cm, wb);
1229 } else {
1230 MV_REFERENCE_FRAME ref_frame;
1231 vpx_wb_write_literal(wb, get_refresh_mask(cpi), REF_FRAMES);
1232 for (ref_frame = LAST_FRAME; ref_frame <= ALTREF_FRAME; ++ref_frame) {
1233 assert(get_ref_frame_map_idx(cpi, ref_frame) != INVALID_IDX);
1234 vpx_wb_write_literal(wb, get_ref_frame_map_idx(cpi, ref_frame),
1235 REF_FRAMES_LOG2);
1236 vpx_wb_write_bit(wb, cm->ref_frame_sign_bias[ref_frame]);
1237 }
1238
1239 write_frame_size_with_refs(cpi, wb);
1240
1241 vpx_wb_write_bit(wb, cm->allow_high_precision_mv);
1242
1243 fix_interp_filter(cm, cpi->td.counts);
1244 write_interp_filter(cm->interp_filter, wb);
1245 }
1246 }
1247
1248 if (!cm->error_resilient_mode) {
1249 vpx_wb_write_bit(wb,
1250 cm->refresh_frame_context != REFRESH_FRAME_CONTEXT_OFF);
1251 #if CONFIG_MISC_FIXES
1252 if (cm->refresh_frame_context != REFRESH_FRAME_CONTEXT_OFF)
1253 #endif
1254 vpx_wb_write_bit(wb, cm->refresh_frame_context !=
1255 REFRESH_FRAME_CONTEXT_BACKWARD);
1256 }
1257
1258 vpx_wb_write_literal(wb, cm->frame_context_idx, FRAME_CONTEXTS_LOG2);
1259
1260 encode_loopfilter(&cm->lf, wb);
1261 encode_quantization(cm, wb);
1262 encode_segmentation(cm, xd, wb);
1263 #if CONFIG_MISC_FIXES
1264 if (!cm->seg.enabled && xd->lossless[0])
1265 cm->tx_mode = TX_4X4;
1266 else
1267 write_txfm_mode(cm->tx_mode, wb);
1268 if (cpi->allow_comp_inter_inter) {
1269 const int use_hybrid_pred = cm->reference_mode == REFERENCE_MODE_SELECT;
1270 const int use_compound_pred = cm->reference_mode != SINGLE_REFERENCE;
1271
1272 vpx_wb_write_bit(wb, use_hybrid_pred);
1273 if (!use_hybrid_pred)
1274 vpx_wb_write_bit(wb, use_compound_pred);
1275 }
1276 #endif
1277
1278 write_tile_info(cm, wb);
1279 }
1280
1281 static size_t write_compressed_header(VP10_COMP *cpi, uint8_t *data) {
1282 VP10_COMMON *const cm = &cpi->common;
1283 FRAME_CONTEXT *const fc = cm->fc;
1284 FRAME_COUNTS *counts = cpi->td.counts;
1285 vpx_writer header_bc;
1286 int i;
1287 #if CONFIG_MISC_FIXES
1288 int j;
1289 #endif
1290
1291 vpx_start_encode(&header_bc, data);
1292
1293 #if !CONFIG_MISC_FIXES
1294 if (cpi->td.mb.e_mbd.lossless[0])
1295 cm->tx_mode = TX_4X4;
1296 else
1297 update_txfm_probs(cm, &header_bc, counts);
1298 #else
1299 update_txfm_probs(cm, &header_bc, counts);
1300 #endif
1301 update_coef_probs(cpi, &header_bc);
1302 update_skip_probs(cm, &header_bc, counts);
1303 #if CONFIG_MISC_FIXES
1304 update_seg_probs(cpi, &header_bc);
1305
1306 for (i = 0; i < INTRA_MODES; ++i)
1307 prob_diff_update(vp10_intra_mode_tree, fc->uv_mode_prob[i],
1308 counts->uv_mode[i], INTRA_MODES, &header_bc);
1309
1310 for (i = 0; i < PARTITION_CONTEXTS; ++i)
1311 prob_diff_update(vp10_partition_tree, fc->partition_prob[i],
1312 counts->partition[i], PARTITION_TYPES, &header_bc);
1313 #endif
1314
1315 if (frame_is_intra_only(cm)) {
1316 vp10_copy(cm->kf_y_prob, vp10_kf_y_mode_prob);
1317 #if CONFIG_MISC_FIXES
1318 for (i = 0; i < INTRA_MODES; ++i)
1319 for (j = 0; j < INTRA_MODES; ++j)
1320 prob_diff_update(vp10_intra_mode_tree, cm->kf_y_prob[i][j],
1321 counts->kf_y_mode[i][j], INTRA_MODES, &header_bc);
1322 #endif
1323 } else {
1324 for (i = 0; i < INTER_MODE_CONTEXTS; ++i)
1325 prob_diff_update(vp10_inter_mode_tree, cm->fc->inter_mode_probs[i],
1326 counts->inter_mode[i], INTER_MODES, &header_bc);
1327
1328 if (cm->interp_filter == SWITCHABLE)
1329 update_switchable_interp_probs(cm, &header_bc, counts);
1330
1331 for (i = 0; i < INTRA_INTER_CONTEXTS; i++)
1332 vp10_cond_prob_diff_update(&header_bc, &fc->intra_inter_prob[i],
1333 counts->intra_inter[i]);
1334
1335 if (cpi->allow_comp_inter_inter) {
1336 const int use_hybrid_pred = cm->reference_mode == REFERENCE_MODE_SELECT;
1337 #if !CONFIG_MISC_FIXES
1338 const int use_compound_pred = cm->reference_mode != SINGLE_REFERENCE;
1339
1340 vpx_write_bit(&header_bc, use_compound_pred);
1341 if (use_compound_pred) {
1342 vpx_write_bit(&header_bc, use_hybrid_pred);
1343 if (use_hybrid_pred)
1344 for (i = 0; i < COMP_INTER_CONTEXTS; i++)
1345 vp10_cond_prob_diff_update(&header_bc, &fc->comp_inter_prob[i],
1346 counts->comp_inter[i]);
1347 }
1348 #else
1349 if (use_hybrid_pred)
1350 for (i = 0; i < COMP_INTER_CONTEXTS; i++)
1351 vp10_cond_prob_diff_update(&header_bc, &fc->comp_inter_prob[i],
1352 counts->comp_inter[i]);
1353 #endif
1354 }
1355
1356 if (cm->reference_mode != COMPOUND_REFERENCE) {
1357 for (i = 0; i < REF_CONTEXTS; i++) {
1358 vp10_cond_prob_diff_update(&header_bc, &fc->single_ref_prob[i][0],
1359 counts->single_ref[i][0]);
1360 vp10_cond_prob_diff_update(&header_bc, &fc->single_ref_prob[i][1],
1361 counts->single_ref[i][1]);
1362 }
1363 }
1364
1365 if (cm->reference_mode != SINGLE_REFERENCE)
1366 for (i = 0; i < REF_CONTEXTS; i++)
1367 vp10_cond_prob_diff_update(&header_bc, &fc->comp_ref_prob[i],
1368 counts->comp_ref[i]);
1369
1370 for (i = 0; i < BLOCK_SIZE_GROUPS; ++i)
1371 prob_diff_update(vp10_intra_mode_tree, cm->fc->y_mode_prob[i],
1372 counts->y_mode[i], INTRA_MODES, &header_bc);
1373
1374 #if !CONFIG_MISC_FIXES
1375 for (i = 0; i < PARTITION_CONTEXTS; ++i)
1376 prob_diff_update(vp10_partition_tree, fc->partition_prob[i],
1377 counts->partition[i], PARTITION_TYPES, &header_bc);
1378 #endif
1379
1380 vp10_write_nmv_probs(cm, cm->allow_high_precision_mv, &header_bc,
1381 &counts->mv);
1382 }
1383
1384 vpx_stop_encode(&header_bc);
1385 assert(header_bc.pos <= 0xffff);
1386
1387 return header_bc.pos;
1388 }
1389
1390 #if CONFIG_MISC_FIXES
1391 static int remux_tiles(uint8_t *dest, const int sz,
1392 const int n_tiles, const int mag) {
1393 int rpos = 0, wpos = 0, n;
1394
1395 for (n = 0; n < n_tiles; n++) {
1396 int tile_sz;
1397
1398 if (n == n_tiles - 1) {
1399 tile_sz = sz - rpos;
1400 } else {
1401 tile_sz = mem_get_le32(&dest[rpos]) + 1;
1402 rpos += 4;
1403 switch (mag) {
1404 case 0:
1405 dest[wpos] = tile_sz - 1;
1406 break;
1407 case 1:
1408 mem_put_le16(&dest[wpos], tile_sz - 1);
1409 break;
1410 case 2:
1411 mem_put_le24(&dest[wpos], tile_sz - 1);
1412 break;
1413 case 3: // remuxing should only happen if mag < 3
1414 default:
1415 assert("Invalid value for tile size magnitude" && 0);
1416 }
1417 wpos += mag + 1;
1418 }
1419
1420 memmove(&dest[wpos], &dest[rpos], tile_sz);
1421 wpos += tile_sz;
1422 rpos += tile_sz;
1423 }
1424
1425 assert(rpos > wpos);
1426 assert(rpos == sz);
1427
1428 return wpos;
1429 }
1430 #endif
1431
1432 void vp10_pack_bitstream(VP10_COMP *const cpi, uint8_t *dest, size_t *size) {
1433 uint8_t *data = dest;
1434 size_t first_part_size, uncompressed_hdr_size, data_sz;
1435 struct vpx_write_bit_buffer wb = {data, 0};
1436 struct vpx_write_bit_buffer saved_wb;
1437 unsigned int max_tile;
1438 #if CONFIG_MISC_FIXES
1439 VP10_COMMON *const cm = &cpi->common;
1440 const int n_log2_tiles = cm->log2_tile_rows + cm->log2_tile_cols;
1441 const int have_tiles = n_log2_tiles > 0;
1442 #else
1443 const int have_tiles = 0; // we have tiles, but we don't want to write a
1444 // tile size marker in the header
1445 #endif
1446
1447 write_uncompressed_header(cpi, &wb);
1448 saved_wb = wb;
1449 // don't know in advance first part. size
1450 vpx_wb_write_literal(&wb, 0, 16 + have_tiles * 2);
1451
1452 uncompressed_hdr_size = vpx_wb_bytes_written(&wb);
1453 data += uncompressed_hdr_size;
1454
1455 vpx_clear_system_state();
1456
1457 first_part_size = write_compressed_header(cpi, data);
1458 data += first_part_size;
1459
1460 data_sz = encode_tiles(cpi, data, &max_tile);
1461 #if CONFIG_MISC_FIXES
1462 if (max_tile > 0) {
1463 int mag;
1464 unsigned int mask;
1465
1466 // Choose the (tile size) magnitude
1467 for (mag = 0, mask = 0xff; mag < 4; mag++) {
1468 if (max_tile <= mask)
1469 break;
1470 mask <<= 8;
1471 mask |= 0xff;
1472 }
1473 assert(n_log2_tiles > 0);
1474 vpx_wb_write_literal(&saved_wb, mag, 2);
1475 if (mag < 3)
1476 data_sz = (int)remux_tiles(data, data_sz, 1 << n_log2_tiles, mag);
1477 } else {
1478 assert(n_log2_tiles == 0);
1479 }
1480 #endif
1481 data += data_sz;
1482
1483 // TODO(jbb): Figure out what to do if first_part_size > 16 bits.
1484 vpx_wb_write_literal(&saved_wb, (int)first_part_size, 16);
1485
1486 *size = data - dest;
1487 }
AV1 Codec Library