1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
|
// Copyright 2020 The libgav1 Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "src/dsp/motion_vector_search.h"
#include <algorithm>
#include <cassert>
#include <cstddef>
#include <cstdint>
#include "src/dsp/dsp.h"
#include "src/utils/common.h"
#include "src/utils/constants.h"
#include "src/utils/types.h"
namespace libgav1 {
namespace dsp {
namespace {
// Silence unused function warnings when the C functions are not used.
#if LIBGAV1_ENABLE_ALL_DSP_FUNCTIONS || \
!defined(LIBGAV1_Dsp8bpp_MotionVectorSearch)
void MvProjectionCompoundLowPrecision_C(
const MotionVector* LIBGAV1_RESTRICT const temporal_mvs,
const int8_t* LIBGAV1_RESTRICT const temporal_reference_offsets,
const int reference_offsets[2], const int count,
CompoundMotionVector* LIBGAV1_RESTRICT const candidate_mvs) {
// To facilitate the compilers, make a local copy of |reference_offsets|.
const int offsets[2] = {reference_offsets[0], reference_offsets[1]};
int index = 0;
do {
candidate_mvs[index].mv64 = 0;
for (int i = 0; i < 2; ++i) {
// |offsets| non-zero check usually equals true and could be ignored.
if (offsets[i] != 0) {
GetMvProjection(
temporal_mvs[index], offsets[i],
kProjectionMvDivisionLookup[temporal_reference_offsets[index]],
&candidate_mvs[index].mv[i]);
for (auto& mv : candidate_mvs[index].mv[i].mv) {
// The next line is equivalent to:
// if ((mv & 1) != 0) mv += (mv > 0) ? -1 : 1;
mv = (mv - (mv >> 15)) & ~1;
}
}
}
} while (++index < count);
}
void MvProjectionCompoundForceInteger_C(
const MotionVector* LIBGAV1_RESTRICT const temporal_mvs,
const int8_t* LIBGAV1_RESTRICT const temporal_reference_offsets,
const int reference_offsets[2], const int count,
CompoundMotionVector* LIBGAV1_RESTRICT const candidate_mvs) {
// To facilitate the compilers, make a local copy of |reference_offsets|.
const int offsets[2] = {reference_offsets[0], reference_offsets[1]};
int index = 0;
do {
candidate_mvs[index].mv64 = 0;
for (int i = 0; i < 2; ++i) {
// |offsets| non-zero check usually equals true and could be ignored.
if (offsets[i] != 0) {
GetMvProjection(
temporal_mvs[index], offsets[i],
kProjectionMvDivisionLookup[temporal_reference_offsets[index]],
&candidate_mvs[index].mv[i]);
for (auto& mv : candidate_mvs[index].mv[i].mv) {
// The next line is equivalent to:
// const int value = (std::abs(static_cast<int>(mv)) + 3) & ~7;
// const int sign = mv >> 15;
// mv = ApplySign(value, sign);
mv = (mv + 3 - (mv >> 15)) & ~7;
}
}
}
} while (++index < count);
}
void MvProjectionCompoundHighPrecision_C(
const MotionVector* LIBGAV1_RESTRICT const temporal_mvs,
const int8_t* LIBGAV1_RESTRICT const temporal_reference_offsets,
const int reference_offsets[2], const int count,
CompoundMotionVector* LIBGAV1_RESTRICT const candidate_mvs) {
// To facilitate the compilers, make a local copy of |reference_offsets|.
const int offsets[2] = {reference_offsets[0], reference_offsets[1]};
int index = 0;
do {
candidate_mvs[index].mv64 = 0;
for (int i = 0; i < 2; ++i) {
// |offsets| non-zero check usually equals true and could be ignored.
if (offsets[i] != 0) {
GetMvProjection(
temporal_mvs[index], offsets[i],
kProjectionMvDivisionLookup[temporal_reference_offsets[index]],
&candidate_mvs[index].mv[i]);
}
}
} while (++index < count);
}
void MvProjectionSingleLowPrecision_C(
const MotionVector* LIBGAV1_RESTRICT const temporal_mvs,
const int8_t* LIBGAV1_RESTRICT const temporal_reference_offsets,
const int reference_offset, const int count,
MotionVector* LIBGAV1_RESTRICT const candidate_mvs) {
int index = 0;
do {
GetMvProjection(
temporal_mvs[index], reference_offset,
kProjectionMvDivisionLookup[temporal_reference_offsets[index]],
&candidate_mvs[index]);
for (auto& mv : candidate_mvs[index].mv) {
// The next line is equivalent to:
// if ((mv & 1) != 0) mv += (mv > 0) ? -1 : 1;
mv = (mv - (mv >> 15)) & ~1;
}
} while (++index < count);
}
void MvProjectionSingleForceInteger_C(
const MotionVector* LIBGAV1_RESTRICT const temporal_mvs,
const int8_t* LIBGAV1_RESTRICT const temporal_reference_offsets,
const int reference_offset, const int count,
MotionVector* LIBGAV1_RESTRICT const candidate_mvs) {
int index = 0;
do {
GetMvProjection(
temporal_mvs[index], reference_offset,
kProjectionMvDivisionLookup[temporal_reference_offsets[index]],
&candidate_mvs[index]);
for (auto& mv : candidate_mvs[index].mv) {
// The next line is equivalent to:
// const int value = (std::abs(static_cast<int>(mv)) + 3) & ~7;
// const int sign = mv >> 15;
// mv = ApplySign(value, sign);
mv = (mv + 3 - (mv >> 15)) & ~7;
}
} while (++index < count);
}
void MvProjectionSingleHighPrecision_C(
const MotionVector* LIBGAV1_RESTRICT const temporal_mvs,
const int8_t* LIBGAV1_RESTRICT const temporal_reference_offsets,
const int reference_offset, const int count,
MotionVector* LIBGAV1_RESTRICT const candidate_mvs) {
int index = 0;
do {
GetMvProjection(
temporal_mvs[index], reference_offset,
kProjectionMvDivisionLookup[temporal_reference_offsets[index]],
&candidate_mvs[index]);
} while (++index < count);
}
#endif // LIBGAV1_ENABLE_ALL_DSP_FUNCTIONS ||
// !defined(LIBGAV1_Dsp8bpp_MotionVectorSearch)
} // namespace
void MotionVectorSearchInit_C() {
#if LIBGAV1_ENABLE_ALL_DSP_FUNCTIONS || \
!defined(LIBGAV1_Dsp8bpp_MotionVectorSearch)
Dsp* const dsp = dsp_internal::GetWritableDspTable(kBitdepth8);
assert(dsp != nullptr);
dsp->mv_projection_compound[0] = MvProjectionCompoundLowPrecision_C;
dsp->mv_projection_compound[1] = MvProjectionCompoundForceInteger_C;
dsp->mv_projection_compound[2] = MvProjectionCompoundHighPrecision_C;
dsp->mv_projection_single[0] = MvProjectionSingleLowPrecision_C;
dsp->mv_projection_single[1] = MvProjectionSingleForceInteger_C;
dsp->mv_projection_single[2] = MvProjectionSingleHighPrecision_C;
#endif
}
} // namespace dsp
} // namespace libgav1
|
