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
13 #include "vp9/common/vp9_blockd.h"
14 #include "vp9/common/vp9_loopfilter.h"
15 #include "vp9/common/vp9_seg_common.h"
16 #include "vp9/common/vp9_quant_common.h"
17
18 static const int seg_feature_data_signed[SEG_LVL_MAX] = { 1, 1, 0, 0 };
19
20 static const int seg_feature_data_max[SEG_LVL_MAX] = {
21 MAXQ, MAX_LOOP_FILTER, 3, 0 };
22
23 // These functions provide access to new segment level features.
24 // Eventually these function may be "optimized out" but for the moment,
25 // the coding mechanism is still subject to change so these provide a
26 // convenient single point of change.
27
vp9_segfeature_active(const struct segmentation * seg,int segment_id,SEG_LVL_FEATURES feature_id)28 int vp9_segfeature_active(const struct segmentation *seg, int segment_id,
29 SEG_LVL_FEATURES feature_id) {
30 return seg->enabled &&
31 (seg->feature_mask[segment_id] & (1 << feature_id));
32 }
33
vp9_clearall_segfeatures(struct segmentation * seg)34 void vp9_clearall_segfeatures(struct segmentation *seg) {
35 vp9_zero(seg->feature_data);
36 vp9_zero(seg->feature_mask);
37 }
38
vp9_enable_segfeature(struct segmentation * seg,int segment_id,SEG_LVL_FEATURES feature_id)39 void vp9_enable_segfeature(struct segmentation *seg, int segment_id,
40 SEG_LVL_FEATURES feature_id) {
41 seg->feature_mask[segment_id] |= 1 << feature_id;
42 }
43
vp9_seg_feature_data_max(SEG_LVL_FEATURES feature_id)44 int vp9_seg_feature_data_max(SEG_LVL_FEATURES feature_id) {
45 return seg_feature_data_max[feature_id];
46 }
47
vp9_is_segfeature_signed(SEG_LVL_FEATURES feature_id)48 int vp9_is_segfeature_signed(SEG_LVL_FEATURES feature_id) {
49 return seg_feature_data_signed[feature_id];
50 }
51
vp9_set_segdata(struct segmentation * seg,int segment_id,SEG_LVL_FEATURES feature_id,int seg_data)52 void vp9_set_segdata(struct segmentation *seg, int segment_id,
53 SEG_LVL_FEATURES feature_id, int seg_data) {
54 assert(seg_data <= seg_feature_data_max[feature_id]);
55 if (seg_data < 0) {
56 assert(seg_feature_data_signed[feature_id]);
57 assert(-seg_data <= seg_feature_data_max[feature_id]);
58 }
59
60 seg->feature_data[segment_id][feature_id] = seg_data;
61 }
62
vp9_get_segdata(const struct segmentation * seg,int segment_id,SEG_LVL_FEATURES feature_id)63 int vp9_get_segdata(const struct segmentation *seg, int segment_id,
64 SEG_LVL_FEATURES feature_id) {
65 return seg->feature_data[segment_id][feature_id];
66 }
67
68
69 const vp9_tree_index vp9_segment_tree[TREE_SIZE(MAX_SEGMENTS)] = {
70 2, 4, 6, 8, 10, 12,
71 0, -1, -2, -3, -4, -5, -6, -7
72 };
73
74
75 // TBD? Functions to read and write segment data with range / validity checking
76