1 /*
2 * Copyright (c) 2016, Alliance for Open Media. All rights reserved.
3 *
4 * This source code is subject to the terms of the BSD 2 Clause License and
5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
6 * was not distributed with this source code in the LICENSE file, you can
7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
8 * Media Patent License 1.0 was not distributed with this source code in the
9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
10 */
11
12 #ifndef AOM_AV1_COMMON_SEG_COMMON_H_
13 #define AOM_AV1_COMMON_SEG_COMMON_H_
14
15 #include "aom_dsp/prob.h"
16
17 #ifdef __cplusplus
18 extern "C" {
19 #endif
20
21 #define MAX_SEGMENTS 8
22 #define SEG_TREE_PROBS (MAX_SEGMENTS - 1)
23
24 #define SEG_TEMPORAL_PRED_CTXS 3
25 #define SPATIAL_PREDICTION_PROBS 3
26
27 enum {
28 SEG_LVL_ALT_Q, // Use alternate Quantizer ....
29 SEG_LVL_ALT_LF_Y_V, // Use alternate loop filter value on y plane vertical
30 SEG_LVL_ALT_LF_Y_H, // Use alternate loop filter value on y plane horizontal
31 SEG_LVL_ALT_LF_U, // Use alternate loop filter value on u plane
32 SEG_LVL_ALT_LF_V, // Use alternate loop filter value on v plane
33 SEG_LVL_REF_FRAME, // Optional Segment reference frame
34 SEG_LVL_SKIP, // Optional Segment (0,0) + skip mode
35 SEG_LVL_GLOBALMV,
36 SEG_LVL_MAX
37 } UENUM1BYTE(SEG_LVL_FEATURES);
38
39 struct segmentation {
40 uint8_t enabled;
41 uint8_t update_map;
42 uint8_t update_data;
43 uint8_t temporal_update;
44
45 int16_t feature_data[MAX_SEGMENTS][SEG_LVL_MAX];
46 unsigned int feature_mask[MAX_SEGMENTS];
47 int last_active_segid; // The highest numbered segment id that has some
48 // enabled feature.
49 uint8_t segid_preskip; // Whether the segment id will be read before the
50 // skip syntax element.
51 // 1: the segment id will be read first.
52 // 0: the skip syntax element will be read first.
53 };
54
55 struct segmentation_probs {
56 aom_cdf_prob pred_cdf[SEG_TEMPORAL_PRED_CTXS][CDF_SIZE(2)];
57 aom_cdf_prob spatial_pred_seg_cdf[SPATIAL_PREDICTION_PROBS]
58 [CDF_SIZE(MAX_SEGMENTS)];
59 };
60
segfeature_active(const struct segmentation * seg,uint8_t segment_id,SEG_LVL_FEATURES feature_id)61 static inline int segfeature_active(const struct segmentation *seg,
62 uint8_t segment_id,
63 SEG_LVL_FEATURES feature_id) {
64 return seg->enabled && (seg->feature_mask[segment_id] & (1 << feature_id));
65 }
66
segfeatures_copy(struct segmentation * dst,const struct segmentation * src)67 static inline void segfeatures_copy(struct segmentation *dst,
68 const struct segmentation *src) {
69 int i, j;
70 for (i = 0; i < MAX_SEGMENTS; i++) {
71 dst->feature_mask[i] = src->feature_mask[i];
72 for (j = 0; j < SEG_LVL_MAX; j++) {
73 dst->feature_data[i][j] = src->feature_data[i][j];
74 }
75 }
76 dst->segid_preskip = src->segid_preskip;
77 dst->last_active_segid = src->last_active_segid;
78 }
79
80 void av1_clearall_segfeatures(struct segmentation *seg);
81
82 void av1_enable_segfeature(struct segmentation *seg, int segment_id,
83 SEG_LVL_FEATURES feature_id);
84
85 void av1_calculate_segdata(struct segmentation *seg);
86
87 int av1_seg_feature_data_max(SEG_LVL_FEATURES feature_id);
88
89 int av1_is_segfeature_signed(SEG_LVL_FEATURES feature_id);
90
91 void av1_set_segdata(struct segmentation *seg, int segment_id,
92 SEG_LVL_FEATURES feature_id, int seg_data);
93
get_segdata(const struct segmentation * seg,int segment_id,SEG_LVL_FEATURES feature_id)94 static inline int get_segdata(const struct segmentation *seg, int segment_id,
95 SEG_LVL_FEATURES feature_id) {
96 return seg->feature_data[segment_id][feature_id];
97 }
98
set_segment_id(uint8_t * segment_ids,int mi_offset,int x_mis,int y_mis,int mi_stride,uint8_t segment_id)99 static inline void set_segment_id(uint8_t *segment_ids, int mi_offset,
100 int x_mis, int y_mis, int mi_stride,
101 uint8_t segment_id) {
102 segment_ids += mi_offset;
103 for (int y = 0; y < y_mis; ++y) {
104 memset(&segment_ids[y * mi_stride], segment_id,
105 x_mis * sizeof(segment_ids[0]));
106 }
107 }
108
109 #ifdef __cplusplus
110 } // extern "C"
111 #endif
112
113 #endif // AOM_AV1_COMMON_SEG_COMMON_H_
114