3 * Copyright (c) 2012 The WebM project authors. All Rights Reserved.
5 * Use of this source code is governed by a BSD-style license
6 * that can be found in the LICENSE file in the root of the source
7 * tree. An additional intellectual property rights grant can be found
8 * in the file PATENTS. All contributing project authors may
9 * be found in the AUTHORS file in the root of the source tree.
14 #include "vp9/common/vp9_common.h"
15 #include "vp9/common/vp9_pred_common.h"
16 #include "vp9/common/vp9_seg_common.h"
18 static INLINE const MB_MODE_INFO *get_mbmi(const MODE_INFO *const mi) {
19 return (mi != NULL) ? &mi->mbmi : NULL;
22 // Returns a context number for the given MB prediction signal
23 int vp9_get_pred_context_switchable_interp(const MACROBLOCKD *xd) {
25 // The mode info data structure has a one element border above and to the
26 // left of the entries correpsonding to real macroblocks.
27 // The prediction flags in these dummy entries are initialised to 0.
28 const MB_MODE_INFO *const left_mbmi = get_mbmi(get_left_mi(xd));
29 const int left_type = left_mbmi != NULL && is_inter_block(left_mbmi) ?
30 left_mbmi->interp_filter : SWITCHABLE_FILTERS;
31 const MB_MODE_INFO *const above_mbmi = get_mbmi(get_above_mi(xd));
32 const int above_type = above_mbmi != NULL && is_inter_block(above_mbmi) ?
33 above_mbmi->interp_filter : SWITCHABLE_FILTERS;
35 if (left_type == above_type)
37 else if (left_type == SWITCHABLE_FILTERS && above_type != SWITCHABLE_FILTERS)
39 else if (left_type != SWITCHABLE_FILTERS && above_type == SWITCHABLE_FILTERS)
42 return SWITCHABLE_FILTERS;
45 // The mode info data structure has a one element border above and to the
46 // left of the entries corresponding to real macroblocks.
47 // The prediction flags in these dummy entries are initialized to 0.
48 // 0 - inter/inter, inter/--, --/inter, --/--
49 // 1 - intra/inter, inter/intra
50 // 2 - intra/--, --/intra
52 int vp9_get_intra_inter_context(const MACROBLOCKD *xd) {
53 const MB_MODE_INFO *const above_mbmi = get_mbmi(get_above_mi(xd));
54 const MB_MODE_INFO *const left_mbmi = get_mbmi(get_left_mi(xd));
55 const int has_above = above_mbmi != NULL;
56 const int has_left = left_mbmi != NULL;
58 if (has_above && has_left) { // both edges available
59 const int above_intra = !is_inter_block(above_mbmi);
60 const int left_intra = !is_inter_block(left_mbmi);
61 return left_intra && above_intra ? 3
62 : left_intra || above_intra;
63 } else if (has_above || has_left) { // one edge available
64 return 2 * !is_inter_block(has_above ? above_mbmi : left_mbmi);
70 int vp9_get_reference_mode_context(const VP9_COMMON *cm,
71 const MACROBLOCKD *xd) {
73 const MB_MODE_INFO *const above_mbmi = get_mbmi(get_above_mi(xd));
74 const MB_MODE_INFO *const left_mbmi = get_mbmi(get_left_mi(xd));
75 const int has_above = above_mbmi != NULL;
76 const int has_left = left_mbmi != NULL;
78 // The mode info data structure has a one element border above and to the
79 // left of the entries correpsonding to real macroblocks.
80 // The prediction flags in these dummy entries are initialised to 0.
81 if (has_above && has_left) { // both edges available
82 if (!has_second_ref(above_mbmi) && !has_second_ref(left_mbmi))
83 // neither edge uses comp pred (0/1)
84 ctx = (above_mbmi->ref_frame[0] == cm->comp_fixed_ref) ^
85 (left_mbmi->ref_frame[0] == cm->comp_fixed_ref);
86 else if (!has_second_ref(above_mbmi))
87 // one of two edges uses comp pred (2/3)
88 ctx = 2 + (above_mbmi->ref_frame[0] == cm->comp_fixed_ref ||
89 !is_inter_block(above_mbmi));
90 else if (!has_second_ref(left_mbmi))
91 // one of two edges uses comp pred (2/3)
92 ctx = 2 + (left_mbmi->ref_frame[0] == cm->comp_fixed_ref ||
93 !is_inter_block(left_mbmi));
94 else // both edges use comp pred (4)
96 } else if (has_above || has_left) { // one edge available
97 const MB_MODE_INFO *edge_mbmi = has_above ? above_mbmi : left_mbmi;
99 if (!has_second_ref(edge_mbmi))
100 // edge does not use comp pred (0/1)
101 ctx = edge_mbmi->ref_frame[0] == cm->comp_fixed_ref;
103 // edge uses comp pred (3)
105 } else { // no edges available (1)
108 assert(ctx >= 0 && ctx < COMP_INTER_CONTEXTS);
112 // Returns a context number for the given MB prediction signal
113 int vp9_get_pred_context_comp_ref_p(const VP9_COMMON *cm,
114 const MACROBLOCKD *xd) {
116 const MB_MODE_INFO *const above_mbmi = get_mbmi(get_above_mi(xd));
117 const MB_MODE_INFO *const left_mbmi = get_mbmi(get_left_mi(xd));
118 const int above_in_image = above_mbmi != NULL;
119 const int left_in_image = left_mbmi != NULL;
122 // The mode info data structure has a one element border above and to the
123 // left of the entries correpsonding to real macroblocks.
124 // The prediction flags in these dummy entries are initialised to 0.
125 const int fix_ref_idx = cm->ref_frame_sign_bias[cm->comp_fixed_ref];
126 const int var_ref_idx = !fix_ref_idx;
128 if (above_in_image && left_in_image) { // both edges available
129 const int above_intra = !is_inter_block(above_mbmi);
130 const int left_intra = !is_inter_block(left_mbmi);
132 if (above_intra && left_intra) { // intra/intra (2)
134 } else if (above_intra || left_intra) { // intra/inter
135 const MB_MODE_INFO *edge_mbmi = above_intra ? left_mbmi : above_mbmi;
137 if (!has_second_ref(edge_mbmi)) // single pred (1/3)
138 pred_context = 1 + 2 * (edge_mbmi->ref_frame[0] != cm->comp_var_ref[1]);
139 else // comp pred (1/3)
140 pred_context = 1 + 2 * (edge_mbmi->ref_frame[var_ref_idx]
141 != cm->comp_var_ref[1]);
142 } else { // inter/inter
143 const int l_sg = !has_second_ref(left_mbmi);
144 const int a_sg = !has_second_ref(above_mbmi);
145 const MV_REFERENCE_FRAME vrfa = a_sg ? above_mbmi->ref_frame[0]
146 : above_mbmi->ref_frame[var_ref_idx];
147 const MV_REFERENCE_FRAME vrfl = l_sg ? left_mbmi->ref_frame[0]
148 : left_mbmi->ref_frame[var_ref_idx];
150 if (vrfa == vrfl && cm->comp_var_ref[1] == vrfa) {
152 } else if (l_sg && a_sg) { // single/single
153 if ((vrfa == cm->comp_fixed_ref && vrfl == cm->comp_var_ref[0]) ||
154 (vrfl == cm->comp_fixed_ref && vrfa == cm->comp_var_ref[0]))
156 else if (vrfa == vrfl)
160 } else if (l_sg || a_sg) { // single/comp
161 const MV_REFERENCE_FRAME vrfc = l_sg ? vrfa : vrfl;
162 const MV_REFERENCE_FRAME rfs = a_sg ? vrfa : vrfl;
163 if (vrfc == cm->comp_var_ref[1] && rfs != cm->comp_var_ref[1])
165 else if (rfs == cm->comp_var_ref[1] && vrfc != cm->comp_var_ref[1])
169 } else if (vrfa == vrfl) { // comp/comp
175 } else if (above_in_image || left_in_image) { // one edge available
176 const MB_MODE_INFO *edge_mbmi = above_in_image ? above_mbmi : left_mbmi;
178 if (!is_inter_block(edge_mbmi)) {
181 if (has_second_ref(edge_mbmi))
182 pred_context = 4 * (edge_mbmi->ref_frame[var_ref_idx]
183 != cm->comp_var_ref[1]);
185 pred_context = 3 * (edge_mbmi->ref_frame[0] != cm->comp_var_ref[1]);
187 } else { // no edges available (2)
190 assert(pred_context >= 0 && pred_context < REF_CONTEXTS);
195 int vp9_get_pred_context_single_ref_p1(const MACROBLOCKD *xd) {
197 const MB_MODE_INFO *const above_mbmi = get_mbmi(get_above_mi(xd));
198 const MB_MODE_INFO *const left_mbmi = get_mbmi(get_left_mi(xd));
199 const int has_above = above_mbmi != NULL;
200 const int has_left = left_mbmi != NULL;
202 // The mode info data structure has a one element border above and to the
203 // left of the entries correpsonding to real macroblocks.
204 // The prediction flags in these dummy entries are initialised to 0.
205 if (has_above && has_left) { // both edges available
206 const int above_intra = !is_inter_block(above_mbmi);
207 const int left_intra = !is_inter_block(left_mbmi);
209 if (above_intra && left_intra) { // intra/intra
211 } else if (above_intra || left_intra) { // intra/inter or inter/intra
212 const MB_MODE_INFO *edge_mbmi = above_intra ? left_mbmi : above_mbmi;
213 if (!has_second_ref(edge_mbmi))
214 pred_context = 4 * (edge_mbmi->ref_frame[0] == LAST_FRAME);
216 pred_context = 1 + (edge_mbmi->ref_frame[0] == LAST_FRAME ||
217 edge_mbmi->ref_frame[1] == LAST_FRAME);
218 } else { // inter/inter
219 const int above_has_second = has_second_ref(above_mbmi);
220 const int left_has_second = has_second_ref(left_mbmi);
222 if (above_has_second && left_has_second) {
223 pred_context = 1 + (above_mbmi->ref_frame[0] == LAST_FRAME ||
224 above_mbmi->ref_frame[1] == LAST_FRAME ||
225 left_mbmi->ref_frame[0] == LAST_FRAME ||
226 left_mbmi->ref_frame[1] == LAST_FRAME);
227 } else if (above_has_second || left_has_second) {
228 const MV_REFERENCE_FRAME rfs = !above_has_second ?
229 above_mbmi->ref_frame[0] : left_mbmi->ref_frame[0];
230 const MV_REFERENCE_FRAME crf1 = above_has_second ?
231 above_mbmi->ref_frame[0] : left_mbmi->ref_frame[0];
232 const MV_REFERENCE_FRAME crf2 = above_has_second ?
233 above_mbmi->ref_frame[1] : left_mbmi->ref_frame[1];
235 if (rfs == LAST_FRAME)
236 pred_context = 3 + (crf1 == LAST_FRAME || crf2 == LAST_FRAME);
238 pred_context = (crf1 == LAST_FRAME || crf2 == LAST_FRAME);
240 pred_context = 2 * (above_mbmi->ref_frame[0] == LAST_FRAME) +
241 2 * (left_mbmi->ref_frame[0] == LAST_FRAME);
244 } else if (has_above || has_left) { // one edge available
245 const MB_MODE_INFO *edge_mbmi = has_above ? above_mbmi : left_mbmi;
246 if (!is_inter_block(edge_mbmi)) { // intra
249 if (!has_second_ref(edge_mbmi))
250 pred_context = 4 * (edge_mbmi->ref_frame[0] == LAST_FRAME);
252 pred_context = 1 + (edge_mbmi->ref_frame[0] == LAST_FRAME ||
253 edge_mbmi->ref_frame[1] == LAST_FRAME);
255 } else { // no edges available
259 assert(pred_context >= 0 && pred_context < REF_CONTEXTS);
263 int vp9_get_pred_context_single_ref_p2(const MACROBLOCKD *xd) {
265 const MB_MODE_INFO *const above_mbmi = get_mbmi(get_above_mi(xd));
266 const MB_MODE_INFO *const left_mbmi = get_mbmi(get_left_mi(xd));
267 const int has_above = above_mbmi != NULL;
268 const int has_left = left_mbmi != NULL;
271 // The mode info data structure has a one element border above and to the
272 // left of the entries correpsonding to real macroblocks.
273 // The prediction flags in these dummy entries are initialised to 0.
274 if (has_above && has_left) { // both edges available
275 const int above_intra = !is_inter_block(above_mbmi);
276 const int left_intra = !is_inter_block(left_mbmi);
278 if (above_intra && left_intra) { // intra/intra
280 } else if (above_intra || left_intra) { // intra/inter or inter/intra
281 const MB_MODE_INFO *edge_mbmi = above_intra ? left_mbmi : above_mbmi;
282 if (!has_second_ref(edge_mbmi)) {
283 if (edge_mbmi->ref_frame[0] == LAST_FRAME)
286 pred_context = 4 * (edge_mbmi->ref_frame[0] == GOLDEN_FRAME);
288 pred_context = 1 + 2 * (edge_mbmi->ref_frame[0] == GOLDEN_FRAME ||
289 edge_mbmi->ref_frame[1] == GOLDEN_FRAME);
291 } else { // inter/inter
292 const int above_has_second = has_second_ref(above_mbmi);
293 const int left_has_second = has_second_ref(left_mbmi);
295 if (above_has_second && left_has_second) {
296 if (above_mbmi->ref_frame[0] == left_mbmi->ref_frame[0] &&
297 above_mbmi->ref_frame[1] == left_mbmi->ref_frame[1])
298 pred_context = 3 * (above_mbmi->ref_frame[0] == GOLDEN_FRAME ||
299 above_mbmi->ref_frame[1] == GOLDEN_FRAME ||
300 left_mbmi->ref_frame[0] == GOLDEN_FRAME ||
301 left_mbmi->ref_frame[1] == GOLDEN_FRAME);
304 } else if (above_has_second || left_has_second) {
305 const MV_REFERENCE_FRAME rfs = !above_has_second ?
306 above_mbmi->ref_frame[0] : left_mbmi->ref_frame[0];
307 const MV_REFERENCE_FRAME crf1 = above_has_second ?
308 above_mbmi->ref_frame[0] : left_mbmi->ref_frame[0];
309 const MV_REFERENCE_FRAME crf2 = above_has_second ?
310 above_mbmi->ref_frame[1] : left_mbmi->ref_frame[1];
312 if (rfs == GOLDEN_FRAME)
313 pred_context = 3 + (crf1 == GOLDEN_FRAME || crf2 == GOLDEN_FRAME);
314 else if (rfs == ALTREF_FRAME)
315 pred_context = crf1 == GOLDEN_FRAME || crf2 == GOLDEN_FRAME;
317 pred_context = 1 + 2 * (crf1 == GOLDEN_FRAME || crf2 == GOLDEN_FRAME);
319 if (above_mbmi->ref_frame[0] == LAST_FRAME &&
320 left_mbmi->ref_frame[0] == LAST_FRAME) {
322 } else if (above_mbmi->ref_frame[0] == LAST_FRAME ||
323 left_mbmi->ref_frame[0] == LAST_FRAME) {
324 const MB_MODE_INFO *edge_mbmi =
325 above_mbmi->ref_frame[0] == LAST_FRAME ? left_mbmi : above_mbmi;
326 pred_context = 4 * (edge_mbmi->ref_frame[0] == GOLDEN_FRAME);
328 pred_context = 2 * (above_mbmi->ref_frame[0] == GOLDEN_FRAME) +
329 2 * (left_mbmi->ref_frame[0] == GOLDEN_FRAME);
333 } else if (has_above || has_left) { // one edge available
334 const MB_MODE_INFO *edge_mbmi = has_above ? above_mbmi : left_mbmi;
336 if (!is_inter_block(edge_mbmi) ||
337 (edge_mbmi->ref_frame[0] == LAST_FRAME && !has_second_ref(edge_mbmi)))
339 else if (!has_second_ref(edge_mbmi))
340 pred_context = 4 * (edge_mbmi->ref_frame[0] == GOLDEN_FRAME);
342 pred_context = 3 * (edge_mbmi->ref_frame[0] == GOLDEN_FRAME ||
343 edge_mbmi->ref_frame[1] == GOLDEN_FRAME);
344 } else { // no edges available (2)
347 assert(pred_context >= 0 && pred_context < REF_CONTEXTS);
350 // Returns a context number for the given MB prediction signal
351 // The mode info data structure has a one element border above and to the
352 // left of the entries corresponding to real blocks.
353 // The prediction flags in these dummy entries are initialized to 0.
354 int vp9_get_tx_size_context(const MACROBLOCKD *xd) {
355 const int max_tx_size = max_txsize_lookup[xd->mi_8x8[0]->mbmi.sb_type];
356 const MB_MODE_INFO *const above_mbmi = get_mbmi(get_above_mi(xd));
357 const MB_MODE_INFO *const left_mbmi = get_mbmi(get_left_mi(xd));
358 const int has_above = above_mbmi != NULL;
359 const int has_left = left_mbmi != NULL;
360 int above_ctx = (has_above && !above_mbmi->skip_coeff) ? above_mbmi->tx_size
362 int left_ctx = (has_left && !left_mbmi->skip_coeff) ? left_mbmi->tx_size
365 left_ctx = above_ctx;
368 above_ctx = left_ctx;
370 return (above_ctx + left_ctx) > max_tx_size;
373 int vp9_get_segment_id(VP9_COMMON *cm, const uint8_t *segment_ids,
374 BLOCK_SIZE bsize, int mi_row, int mi_col) {
375 const int mi_offset = mi_row * cm->mi_cols + mi_col;
376 const int bw = num_8x8_blocks_wide_lookup[bsize];
377 const int bh = num_8x8_blocks_high_lookup[bsize];
378 const int xmis = MIN(cm->mi_cols - mi_col, bw);
379 const int ymis = MIN(cm->mi_rows - mi_row, bh);
380 int x, y, segment_id = INT_MAX;
382 for (y = 0; y < ymis; y++)
383 for (x = 0; x < xmis; x++)
384 segment_id = MIN(segment_id,
385 segment_ids[mi_offset + y * cm->mi_cols + x]);
387 assert(segment_id >= 0 && segment_id < MAX_SEGMENTS);