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
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
|
// Copyright 2019 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/distance_weighted_blend.h"
#include "src/utils/cpu.h"
#if LIBGAV1_TARGETING_SSE4_1
#include <xmmintrin.h>
#include <cassert>
#include <cstddef>
#include <cstdint>
#include "src/dsp/constants.h"
#include "src/dsp/dsp.h"
#include "src/dsp/x86/common_sse4.h"
#include "src/utils/common.h"
namespace libgav1 {
namespace dsp {
namespace {
constexpr int kInterPostRoundBit = 4;
inline __m128i ComputeWeightedAverage8(const __m128i& pred0,
const __m128i& pred1,
const __m128i& weights) {
// TODO(https://issuetracker.google.com/issues/150325685): Investigate range.
const __m128i preds_lo = _mm_unpacklo_epi16(pred0, pred1);
const __m128i mult_lo = _mm_madd_epi16(preds_lo, weights);
const __m128i result_lo =
RightShiftWithRounding_S32(mult_lo, kInterPostRoundBit + 4);
const __m128i preds_hi = _mm_unpackhi_epi16(pred0, pred1);
const __m128i mult_hi = _mm_madd_epi16(preds_hi, weights);
const __m128i result_hi =
RightShiftWithRounding_S32(mult_hi, kInterPostRoundBit + 4);
return _mm_packs_epi32(result_lo, result_hi);
}
template <int height>
inline void DistanceWeightedBlend4xH_SSE4_1(
const int16_t* pred_0, const int16_t* pred_1, const uint8_t weight_0,
const uint8_t weight_1, void* const dest, const ptrdiff_t dest_stride) {
auto* dst = static_cast<uint8_t*>(dest);
const __m128i weights = _mm_set1_epi32(weight_0 | (weight_1 << 16));
for (int y = 0; y < height; y += 4) {
// TODO(b/150326556): Use larger loads.
const __m128i src_00 = LoadLo8(pred_0);
const __m128i src_10 = LoadLo8(pred_1);
pred_0 += 4;
pred_1 += 4;
__m128i src_0 = LoadHi8(src_00, pred_0);
__m128i src_1 = LoadHi8(src_10, pred_1);
pred_0 += 4;
pred_1 += 4;
const __m128i res0 = ComputeWeightedAverage8(src_0, src_1, weights);
const __m128i src_01 = LoadLo8(pred_0);
const __m128i src_11 = LoadLo8(pred_1);
pred_0 += 4;
pred_1 += 4;
src_0 = LoadHi8(src_01, pred_0);
src_1 = LoadHi8(src_11, pred_1);
pred_0 += 4;
pred_1 += 4;
const __m128i res1 = ComputeWeightedAverage8(src_0, src_1, weights);
const __m128i result_pixels = _mm_packus_epi16(res0, res1);
Store4(dst, result_pixels);
dst += dest_stride;
const int result_1 = _mm_extract_epi32(result_pixels, 1);
memcpy(dst, &result_1, sizeof(result_1));
dst += dest_stride;
const int result_2 = _mm_extract_epi32(result_pixels, 2);
memcpy(dst, &result_2, sizeof(result_2));
dst += dest_stride;
const int result_3 = _mm_extract_epi32(result_pixels, 3);
memcpy(dst, &result_3, sizeof(result_3));
dst += dest_stride;
}
}
template <int height>
inline void DistanceWeightedBlend8xH_SSE4_1(
const int16_t* pred_0, const int16_t* pred_1, const uint8_t weight_0,
const uint8_t weight_1, void* const dest, const ptrdiff_t dest_stride) {
auto* dst = static_cast<uint8_t*>(dest);
const __m128i weights = _mm_set1_epi32(weight_0 | (weight_1 << 16));
for (int y = 0; y < height; y += 2) {
const __m128i src_00 = LoadAligned16(pred_0);
const __m128i src_10 = LoadAligned16(pred_1);
pred_0 += 8;
pred_1 += 8;
const __m128i res0 = ComputeWeightedAverage8(src_00, src_10, weights);
const __m128i src_01 = LoadAligned16(pred_0);
const __m128i src_11 = LoadAligned16(pred_1);
pred_0 += 8;
pred_1 += 8;
const __m128i res1 = ComputeWeightedAverage8(src_01, src_11, weights);
const __m128i result_pixels = _mm_packus_epi16(res0, res1);
StoreLo8(dst, result_pixels);
dst += dest_stride;
StoreHi8(dst, result_pixels);
dst += dest_stride;
}
}
inline void DistanceWeightedBlendLarge_SSE4_1(
const int16_t* pred_0, const int16_t* pred_1, const uint8_t weight_0,
const uint8_t weight_1, const int width, const int height, void* const dest,
const ptrdiff_t dest_stride) {
auto* dst = static_cast<uint8_t*>(dest);
const __m128i weights = _mm_set1_epi32(weight_0 | (weight_1 << 16));
int y = height;
do {
int x = 0;
do {
const __m128i src_0_lo = LoadAligned16(pred_0 + x);
const __m128i src_1_lo = LoadAligned16(pred_1 + x);
const __m128i res_lo =
ComputeWeightedAverage8(src_0_lo, src_1_lo, weights);
const __m128i src_0_hi = LoadAligned16(pred_0 + x + 8);
const __m128i src_1_hi = LoadAligned16(pred_1 + x + 8);
const __m128i res_hi =
ComputeWeightedAverage8(src_0_hi, src_1_hi, weights);
StoreUnaligned16(dst + x, _mm_packus_epi16(res_lo, res_hi));
x += 16;
} while (x < width);
dst += dest_stride;
pred_0 += width;
pred_1 += width;
} while (--y != 0);
}
void DistanceWeightedBlend_SSE4_1(const void* prediction_0,
const void* prediction_1,
const uint8_t weight_0,
const uint8_t weight_1, const int width,
const int height, void* const dest,
const ptrdiff_t dest_stride) {
const auto* pred_0 = static_cast<const int16_t*>(prediction_0);
const auto* pred_1 = static_cast<const int16_t*>(prediction_1);
if (width == 4) {
if (height == 4) {
DistanceWeightedBlend4xH_SSE4_1<4>(pred_0, pred_1, weight_0, weight_1,
dest, dest_stride);
} else if (height == 8) {
DistanceWeightedBlend4xH_SSE4_1<8>(pred_0, pred_1, weight_0, weight_1,
dest, dest_stride);
} else {
assert(height == 16);
DistanceWeightedBlend4xH_SSE4_1<16>(pred_0, pred_1, weight_0, weight_1,
dest, dest_stride);
}
return;
}
if (width == 8) {
switch (height) {
case 4:
DistanceWeightedBlend8xH_SSE4_1<4>(pred_0, pred_1, weight_0, weight_1,
dest, dest_stride);
return;
case 8:
DistanceWeightedBlend8xH_SSE4_1<8>(pred_0, pred_1, weight_0, weight_1,
dest, dest_stride);
return;
case 16:
DistanceWeightedBlend8xH_SSE4_1<16>(pred_0, pred_1, weight_0, weight_1,
dest, dest_stride);
return;
default:
assert(height == 32);
DistanceWeightedBlend8xH_SSE4_1<32>(pred_0, pred_1, weight_0, weight_1,
dest, dest_stride);
return;
}
}
DistanceWeightedBlendLarge_SSE4_1(pred_0, pred_1, weight_0, weight_1, width,
height, dest, dest_stride);
}
void Init8bpp() {
Dsp* const dsp = dsp_internal::GetWritableDspTable(kBitdepth8);
assert(dsp != nullptr);
#if DSP_ENABLED_8BPP_SSE4_1(DistanceWeightedBlend)
dsp->distance_weighted_blend = DistanceWeightedBlend_SSE4_1;
#endif
}
} // namespace
void DistanceWeightedBlendInit_SSE4_1() { Init8bpp(); }
} // namespace dsp
} // namespace libgav1
#else // !LIBGAV1_TARGETING_SSE4_1
namespace libgav1 {
namespace dsp {
void DistanceWeightedBlendInit_SSE4_1() {}
} // namespace dsp
} // namespace libgav1
#endif // LIBGAV1_TARGETING_SSE4_1
|
