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] = { MAXQ, MAX_LOOP_FILTER, 3,
21 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_clearall_segfeatures(struct segmentation * seg)28 void vp9_clearall_segfeatures(struct segmentation *seg) {
29 vp9_zero(seg->feature_data);
30 vp9_zero(seg->feature_mask);
31 seg->aq_av_offset = 0;
32 }
33
vp9_enable_segfeature(struct segmentation * seg,int segment_id,SEG_LVL_FEATURES feature_id)34 void vp9_enable_segfeature(struct segmentation *seg, int segment_id,
35 SEG_LVL_FEATURES feature_id) {
36 seg->feature_mask[segment_id] |= 1 << feature_id;
37 }
38
vp9_seg_feature_data_max(SEG_LVL_FEATURES feature_id)39 int vp9_seg_feature_data_max(SEG_LVL_FEATURES feature_id) {
40 return seg_feature_data_max[feature_id];
41 }
42
vp9_is_segfeature_signed(SEG_LVL_FEATURES feature_id)43 int vp9_is_segfeature_signed(SEG_LVL_FEATURES feature_id) {
44 return seg_feature_data_signed[feature_id];
45 }
46
vp9_set_segdata(struct segmentation * seg,int segment_id,SEG_LVL_FEATURES feature_id,int seg_data)47 void vp9_set_segdata(struct segmentation *seg, int segment_id,
48 SEG_LVL_FEATURES feature_id, int seg_data) {
49 assert(seg_data <= seg_feature_data_max[feature_id]);
50 if (seg_data < 0) {
51 assert(seg_feature_data_signed[feature_id]);
52 assert(-seg_data <= seg_feature_data_max[feature_id]);
53 }
54
55 seg->feature_data[segment_id][feature_id] = seg_data;
56 }
57
58 const vpx_tree_index vp9_segment_tree[TREE_SIZE(MAX_SEGMENTS)] = {
59 2, 4, 6, 8, 10, 12, 0, -1, -2, -3, -4, -5, -6, -7
60 };
61
62 // TBD? Functions to read and write segment data with range / validity checking
63