1 /*
2  *  Copyright (c) 2012 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 #ifndef VP9_COMMON_VP9_SEG_COMMON_H_
12 #define VP9_COMMON_VP9_SEG_COMMON_H_
13 
14 #include "vp9/common/vp9_prob.h"
15 
16 #ifdef __cplusplus
17 extern "C" {
18 #endif
19 
20 #define SEGMENT_DELTADATA   0
21 #define SEGMENT_ABSDATA     1
22 
23 #define MAX_SEGMENTS     8
24 #define SEG_TREE_PROBS   (MAX_SEGMENTS-1)
25 
26 #define PREDICTION_PROBS 3
27 
28 // Segment level features.
29 typedef enum {
30   SEG_LVL_ALT_Q = 0,               // Use alternate Quantizer ....
31   SEG_LVL_ALT_LF = 1,              // Use alternate loop filter value...
32   SEG_LVL_REF_FRAME = 2,           // Optional Segment reference frame
33   SEG_LVL_SKIP = 3,                // Optional Segment (0,0) + skip mode
34   SEG_LVL_MAX = 4                  // Number of features supported
35 } SEG_LVL_FEATURES;
36 
37 
38 struct segmentation {
39   uint8_t enabled;
40   uint8_t update_map;
41   uint8_t update_data;
42   uint8_t abs_delta;
43   uint8_t temporal_update;
44 
45   vp9_prob tree_probs[SEG_TREE_PROBS];
46   vp9_prob pred_probs[PREDICTION_PROBS];
47 
48   int16_t feature_data[MAX_SEGMENTS][SEG_LVL_MAX];
49   unsigned int feature_mask[MAX_SEGMENTS];
50 };
51 
52 int vp9_segfeature_active(const struct segmentation *seg,
53                           int segment_id,
54                           SEG_LVL_FEATURES feature_id);
55 
56 void vp9_clearall_segfeatures(struct segmentation *seg);
57 
58 void vp9_enable_segfeature(struct segmentation *seg,
59                            int segment_id,
60                            SEG_LVL_FEATURES feature_id);
61 
62 int vp9_seg_feature_data_max(SEG_LVL_FEATURES feature_id);
63 
64 int vp9_is_segfeature_signed(SEG_LVL_FEATURES feature_id);
65 
66 void vp9_set_segdata(struct segmentation *seg,
67                      int segment_id,
68                      SEG_LVL_FEATURES feature_id,
69                      int seg_data);
70 
71 int vp9_get_segdata(const struct segmentation *seg,
72                     int segment_id,
73                     SEG_LVL_FEATURES feature_id);
74 
75 extern const vp9_tree_index vp9_segment_tree[TREE_SIZE(MAX_SEGMENTS)];
76 
77 #ifdef __cplusplus
78 }  // extern "C"
79 #endif
80 
81 #endif  // VP9_COMMON_VP9_SEG_COMMON_H_
82 
83