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
18static const int seg_feature_data_signed[SEG_LVL_MAX] = { 1, 1, 0, 0 };
19
20static 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
28int 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
34void vp9_clearall_segfeatures(struct segmentation *seg) {
35  vp9_zero(seg->feature_data);
36  vp9_zero(seg->feature_mask);
37}
38
39void 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
44int vp9_seg_feature_data_max(SEG_LVL_FEATURES feature_id) {
45  return seg_feature_data_max[feature_id];
46}
47
48int vp9_is_segfeature_signed(SEG_LVL_FEATURES feature_id) {
49  return seg_feature_data_signed[feature_id];
50}
51
52void 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
63int 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
69const 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