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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 "vpx_dsp/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 struct segmentation {
38   uint8_t enabled;
39   uint8_t update_map;
40   uint8_t update_data;
41   uint8_t abs_delta;
42   uint8_t temporal_update;
43 
44   vpx_prob tree_probs[SEG_TREE_PROBS];
45   vpx_prob pred_probs[PREDICTION_PROBS];
46 
47   int16_t feature_data[MAX_SEGMENTS][SEG_LVL_MAX];
48   uint32_t feature_mask[MAX_SEGMENTS];
49   int aq_av_offset;
50 };
51 
segfeature_active(const struct segmentation * seg,int segment_id,SEG_LVL_FEATURES feature_id)52 static INLINE int segfeature_active(const struct segmentation *seg,
53                                     int segment_id,
54                                     SEG_LVL_FEATURES feature_id) {
55   return seg->enabled && (seg->feature_mask[segment_id] & (1 << feature_id));
56 }
57 
58 void vp9_clearall_segfeatures(struct segmentation *seg);
59 
60 void vp9_enable_segfeature(struct segmentation *seg, int segment_id,
61                            SEG_LVL_FEATURES feature_id);
62 
63 int vp9_seg_feature_data_max(SEG_LVL_FEATURES feature_id);
64 
65 int vp9_is_segfeature_signed(SEG_LVL_FEATURES feature_id);
66 
67 void vp9_set_segdata(struct segmentation *seg, int segment_id,
68                      SEG_LVL_FEATURES feature_id, int seg_data);
69 
get_segdata(const struct segmentation * seg,int segment_id,SEG_LVL_FEATURES feature_id)70 static INLINE int get_segdata(const struct segmentation *seg, int segment_id,
71                               SEG_LVL_FEATURES feature_id) {
72   return seg->feature_data[segment_id][feature_id];
73 }
74 
75 extern const vpx_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