Coverage Report

Created: 2022-08-24 06:17

/src/aom/av1/common/seg_common.c
Line
Count
Source
1
/*
2
 * Copyright (c) 2016, Alliance for Open Media. All rights reserved
3
 *
4
 * This source code is subject to the terms of the BSD 2 Clause License and
5
 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
6
 * was not distributed with this source code in the LICENSE file, you can
7
 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
8
 * Media Patent License 1.0 was not distributed with this source code in the
9
 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
10
 */
11
12
#include <assert.h>
13
14
#include "av1/common/av1_loopfilter.h"
15
#include "av1/common/blockd.h"
16
#include "av1/common/seg_common.h"
17
#include "av1/common/quant_common.h"
18
19
static const int seg_feature_data_signed[SEG_LVL_MAX] = {
20
  1, 1, 1, 1, 1, 0, 0, 0
21
};
22
23
static const int seg_feature_data_max[SEG_LVL_MAX] = { MAXQ,
24
                                                       MAX_LOOP_FILTER,
25
                                                       MAX_LOOP_FILTER,
26
                                                       MAX_LOOP_FILTER,
27
                                                       MAX_LOOP_FILTER,
28
                                                       7,
29
                                                       0,
30
                                                       0 };
31
32
// These functions provide access to new segment level features.
33
// Eventually these function may be "optimized out" but for the moment,
34
// the coding mechanism is still subject to change so these provide a
35
// convenient single point of change.
36
37
13.0k
void av1_clearall_segfeatures(struct segmentation *seg) {
38
13.0k
  av1_zero(seg->feature_data);
39
13.0k
  av1_zero(seg->feature_mask);
40
13.0k
}
41
42
700
void av1_calculate_segdata(struct segmentation *seg) {
43
700
  seg->segid_preskip = 0;
44
700
  seg->last_active_segid = 0;
45
6.30k
  for (int i = 0; i < MAX_SEGMENTS; i++) {
46
50.4k
    for (int j = 0; j < SEG_LVL_MAX; j++) {
47
44.8k
      if (seg->feature_mask[i] & (1 << j)) {
48
24.9k
        seg->segid_preskip |= (j >= SEG_LVL_REF_FRAME);
49
24.9k
        seg->last_active_segid = i;
50
24.9k
      }
51
44.8k
    }
52
5.60k
  }
53
700
}
54
55
void av1_enable_segfeature(struct segmentation *seg, int segment_id,
56
24.9k
                           SEG_LVL_FEATURES feature_id) {
57
24.9k
  seg->feature_mask[segment_id] |= 1 << feature_id;
58
24.9k
}
59
60
24.9k
int av1_seg_feature_data_max(SEG_LVL_FEATURES feature_id) {
61
24.9k
  return seg_feature_data_max[feature_id];
62
24.9k
}
63
64
24.9k
int av1_is_segfeature_signed(SEG_LVL_FEATURES feature_id) {
65
24.9k
  return seg_feature_data_signed[feature_id];
66
24.9k
}
67
68
// The 'seg_data' given for each segment can be either deltas (from the default
69
// value chosen for the frame) or absolute values.
70
//
71
// Valid range for abs values is (0-127 for MB_LVL_ALT_Q), (0-63 for
72
// SEGMENT_ALT_LF)
73
// Valid range for delta values are (+/-127 for MB_LVL_ALT_Q), (+/-63 for
74
// SEGMENT_ALT_LF)
75
//
76
// abs_delta = SEGMENT_DELTADATA (deltas) abs_delta = SEGMENT_ABSDATA (use
77
// the absolute values given).
78
79
void av1_set_segdata(struct segmentation *seg, int segment_id,
80
44.8k
                     SEG_LVL_FEATURES feature_id, int seg_data) {
81
44.8k
  if (seg_data < 0) {
82
11.9k
    assert(seg_feature_data_signed[feature_id]);
83
11.9k
    assert(-seg_data <= seg_feature_data_max[feature_id]);
84
32.8k
  } else {
85
32.8k
    assert(seg_data <= seg_feature_data_max[feature_id]);
86
32.8k
  }
87
88
44.8k
  seg->feature_data[segment_id][feature_id] = seg_data;
89
44.8k
}
90
91
// TBD? Functions to read and write segment data with range / validity checking