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
|
/*
* Copyright (c) 2012 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include <limits.h>
#include <stdio.h>
#include <string.h>
#include "third_party/googletest/src/include/gtest/gtest.h"
#include "./vpx_config.h"
#if CONFIG_VP9_ENCODER
#include "./vp9_rtcd.h"
#endif
#include "test/acm_random.h"
#include "test/clear_system_state.h"
#include "test/register_state_check.h"
#include "test/util.h"
#include "vpx_mem/vpx_mem.h"
extern "C"
double vp9_get_blockiness(const unsigned char *img1, int img1_pitch,
const unsigned char *img2, int img2_pitch,
int width, int height);
using libvpx_test::ACMRandom;
namespace {
class BlockinessTestBase : public ::testing::Test {
public:
BlockinessTestBase(int width, int height) : width_(width), height_(height) {}
static void SetUpTestCase() {
source_data_ = reinterpret_cast<uint8_t*>(
vpx_memalign(kDataAlignment, kDataBufferSize));
reference_data_ = reinterpret_cast<uint8_t*>(
vpx_memalign(kDataAlignment, kDataBufferSize));
}
static void TearDownTestCase() {
vpx_free(source_data_);
source_data_ = NULL;
vpx_free(reference_data_);
reference_data_ = NULL;
}
virtual void TearDown() {
libvpx_test::ClearSystemState();
}
protected:
// Handle frames up to 640x480
static const int kDataAlignment = 16;
static const int kDataBufferSize = 640*480;
virtual void SetUp() {
source_stride_ = (width_ + 31) & ~31;
reference_stride_ = width_ * 2;
rnd_.Reset(ACMRandom::DeterministicSeed());
}
void FillConstant(uint8_t *data, int stride, uint8_t fill_constant,
int width, int height) {
for (int h = 0; h < height; ++h) {
for (int w = 0; w < width; ++w) {
data[h * stride + w] = fill_constant;
}
}
}
void FillConstant(uint8_t *data, int stride, uint8_t fill_constant) {
FillConstant(data, stride, fill_constant, width_, height_);
}
void FillRandom(uint8_t *data, int stride, int width, int height) {
for (int h = 0; h < height; ++h) {
for (int w = 0; w < width; ++w) {
data[h * stride + w] = rnd_.Rand8();
}
}
}
void FillRandom(uint8_t *data, int stride) {
FillRandom(data, stride, width_, height_);
}
void FillRandomBlocky(uint8_t *data, int stride) {
for (int h = 0; h < height_; h += 4) {
for (int w = 0; w < width_; w += 4) {
FillRandom(data + h * stride + w, stride, 4, 4);
}
}
}
void FillCheckerboard(uint8_t *data, int stride) {
for (int h = 0; h < height_; h += 4) {
for (int w = 0; w < width_; w += 4) {
if (((h/4) ^ (w/4)) & 1)
FillConstant(data + h * stride + w, stride, 255, 4, 4);
else
FillConstant(data + h * stride + w, stride, 0, 4, 4);
}
}
}
void Blur(uint8_t *data, int stride, int taps) {
int sum = 0;
int half_taps = taps / 2;
for (int h = 0; h < height_; ++h) {
for (int w = 0; w < taps; ++w) {
sum += data[w + h * stride];
}
for (int w = taps; w < width_; ++w) {
sum += data[w + h * stride] - data[w - taps + h * stride];
data[w - half_taps + h * stride] = (sum + half_taps) / taps;
}
}
for (int w = 0; w < width_; ++w) {
for (int h = 0; h < taps; ++h) {
sum += data[h + w * stride];
}
for (int h = taps; h < height_; ++h) {
sum += data[w + h * stride] - data[(h - taps) * stride + w];
data[(h - half_taps) * stride + w] = (sum + half_taps) / taps;
}
}
}
int width_, height_;
static uint8_t* source_data_;
int source_stride_;
static uint8_t* reference_data_;
int reference_stride_;
ACMRandom rnd_;
};
#if CONFIG_VP9_ENCODER
typedef std::tr1::tuple<int, int> BlockinessParam;
class BlockinessVP9Test
: public BlockinessTestBase,
public ::testing::WithParamInterface<BlockinessParam> {
public:
BlockinessVP9Test() : BlockinessTestBase(GET_PARAM(0), GET_PARAM(1)) {}
protected:
int CheckBlockiness() {
return vp9_get_blockiness(source_data_, source_stride_,
reference_data_, reference_stride_,
width_, height_);
}
};
#endif // CONFIG_VP9_ENCODER
uint8_t* BlockinessTestBase::source_data_ = NULL;
uint8_t* BlockinessTestBase::reference_data_ = NULL;
#if CONFIG_VP9_ENCODER
TEST_P(BlockinessVP9Test, SourceBlockierThanReference) {
// Source is blockier than reference.
FillRandomBlocky(source_data_, source_stride_);
FillConstant(reference_data_, reference_stride_, 128);
int super_blocky = CheckBlockiness();
EXPECT_EQ(0, super_blocky) << "Blocky source should produce 0 blockiness.";
}
TEST_P(BlockinessVP9Test, ReferenceBlockierThanSource) {
// Source is blockier than reference.
FillConstant(source_data_, source_stride_, 128);
FillRandomBlocky(reference_data_, reference_stride_);
int super_blocky = CheckBlockiness();
EXPECT_GT(super_blocky, 0.0)
<< "Blocky reference should score high for blockiness.";
}
TEST_P(BlockinessVP9Test, BlurringDecreasesBlockiness) {
// Source is blockier than reference.
FillConstant(source_data_, source_stride_, 128);
FillRandomBlocky(reference_data_, reference_stride_);
int super_blocky = CheckBlockiness();
Blur(reference_data_, reference_stride_, 4);
int less_blocky = CheckBlockiness();
EXPECT_GT(super_blocky, less_blocky)
<< "A straight blur should decrease blockiness.";
}
TEST_P(BlockinessVP9Test, WorstCaseBlockiness) {
// Source is blockier than reference.
FillConstant(source_data_, source_stride_, 128);
FillCheckerboard(reference_data_, reference_stride_);
int super_blocky = CheckBlockiness();
Blur(reference_data_, reference_stride_, 4);
int less_blocky = CheckBlockiness();
EXPECT_GT(super_blocky, less_blocky)
<< "A straight blur should decrease blockiness.";
}
#endif // CONFIG_VP9_ENCODER
using std::tr1::make_tuple;
//------------------------------------------------------------------------------
// C functions
#if CONFIG_VP9_ENCODER
const BlockinessParam c_vp9_tests[] = {
make_tuple(320, 240),
make_tuple(318, 242),
make_tuple(318, 238),
};
INSTANTIATE_TEST_CASE_P(C, BlockinessVP9Test, ::testing::ValuesIn(c_vp9_tests));
#endif
} // namespace
|
