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
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
|
#include "atrac3denc.h"
#include <gtest/gtest.h>
#include <vector>
#include <cmath>
using std::vector;
using namespace NAtracDEnc;
static void GenerateSignal(double* buf, size_t n, double f, double a) {
for (size_t i = 0; i < n; ++i) {
buf[i] = a * sin((M_PI/2) * i * f);
}
}
class TWindowTest : public TAtrac3Data {
public:
void RunTest() {
for (size_t i = 0; i < 256; i++) {
const double ha1 = EncodeWindow[i] / 2.0; //compensation
const double hs1 = DecodeWindow[i];
const double hs2 = DecodeWindow[255-i];
const double res = hs1 / (hs1 * hs1 + hs2 * hs2);
EXPECT_NEAR(ha1, res, 0.000000001);
}
}
};
template<class T>
class TAtrac3MDCTWorkBuff {
T* Buffer;
public:
static const size_t BandBuffSz = 256;
static const size_t BandBuffAndOverlapSz = BandBuffSz * 2;
static const size_t BuffSz = BandBuffAndOverlapSz * (4 + 4);
T* const Band0;
T* const Band1;
T* const Band2;
T* const Band3;
T* const Band0Res;
T* const Band1Res;
T* const Band2Res;
T* const Band3Res;
TAtrac3MDCTWorkBuff()
: Buffer(new T[BuffSz])
, Band0(Buffer)
, Band1(Band0 + BandBuffAndOverlapSz)
, Band2(Band1 + BandBuffAndOverlapSz)
, Band3(Band2 + BandBuffAndOverlapSz)
, Band0Res(Band3 + BandBuffAndOverlapSz)
, Band1Res(Band0Res + BandBuffAndOverlapSz)
, Band2Res(Band1Res + BandBuffAndOverlapSz)
, Band3Res(Band2Res + BandBuffAndOverlapSz)
{
memset(Buffer, 0, sizeof(T)*BuffSz);
}
~TAtrac3MDCTWorkBuff()
{
delete[] Buffer;
}
};
TEST(TAtrac3MDCT, TAtrac3MDCTZeroOneBlock) {
TAtrac3MDCT mdct;
TAtrac3MDCTWorkBuff<double> buff;
size_t workSz = TAtrac3MDCTWorkBuff<double>::BandBuffSz;
vector<double> specs(1024);
double* p[4] = { buff.Band0, buff.Band1, buff.Band2, buff.Band3 };
mdct.Mdct(specs.data(), p);
for(auto s: specs)
EXPECT_NEAR(s, 0.0, 0.0000000001);
double* t[4] = { buff.Band0Res, buff.Band1Res, buff.Band2Res, buff.Band3Res };
mdct.Midct(specs.data(), p);
for(size_t i = 0; i < workSz; ++i)
EXPECT_NEAR(buff.Band0Res[i], 0.0, 0.0000000001);
for(size_t i = 0; i < workSz; ++i)
EXPECT_NEAR(buff.Band1Res[i], 0.0, 0.0000000001);
for(size_t i = 0; i < workSz; ++i)
EXPECT_NEAR(buff.Band2Res[i], 0.0, 0.0000000001);
for(size_t i = 0; i < workSz; ++i)
EXPECT_NEAR(buff.Band3Res[i], 0.0, 0.0000000001);
}
TEST(TAtrac3MDCT, TAtrac3MDCTSignal) {
TAtrac3MDCT mdct;
TAtrac3MDCTWorkBuff<double> buff;
size_t workSz = TAtrac3MDCTWorkBuff<double>::BandBuffSz;
const size_t len = 1024;
vector<double> signal(len);
vector<double> signalRes(len);
GenerateSignal(signal.data(), signal.size(), 0.25, 32768);
for (size_t pos = 0; pos < len; pos += workSz) {
vector<double> specs(1024);
memcpy(buff.Band0, signal.data() + pos, workSz * sizeof(double));
double* p[4] = { buff.Band0, buff.Band1, buff.Band2, buff.Band3 };
mdct.Mdct(specs.data(), p);
double* t[4] = { buff.Band0Res, buff.Band1Res, buff.Band2Res, buff.Band3Res };
mdct.Midct(specs.data(), t);
memcpy(signalRes.data() + pos, buff.Band0Res, workSz * sizeof(double));
}
for (int i = workSz; i < len; ++i)
EXPECT_NEAR(signal[i - workSz], signalRes[i], 0.00000001);
}
TEST(TAtrac3MDCT, TAtrac3MDCTSignalWithGainCompensation) {
TAtrac3MDCT mdct;
TAtrac3MDCTWorkBuff<double> buff;
size_t workSz = TAtrac3MDCTWorkBuff<double>::BandBuffSz;
const size_t len = 4096;
vector<double> signal(len, 8000);
vector<double> signalRes(len);
GenerateSignal(signal.data() + 1024, signal.size()-1024, 0.25, 32768);
for (size_t pos = 0; pos < len; pos += workSz) {
vector<double> specs(1024);
memcpy(buff.Band0, signal.data() + pos, workSz * sizeof(double));
double* p[4] = { buff.Band0, buff.Band1, buff.Band2, buff.Band3 };
if (pos == 256) { //apply gain modulation
TAtrac3Data::SubbandInfo siCur;
siCur.AddSubbandCurve(0, {{3, 2}});
mdct.Mdct(specs.data(), p, { mdct.GainProcessor.Modulate(siCur.GetGainPoints(0)),
TAtrac3MDCT::TGainModulator(), TAtrac3MDCT::TGainModulator(), TAtrac3MDCT::TGainModulator()});
} else if (pos == 1024) {
TAtrac3Data::SubbandInfo siCur;
siCur.AddSubbandCurve(0, {{3, 2}});
siCur.AddSubbandCurve(0, {{2, 5}});
mdct.Mdct(specs.data(), p, { mdct.GainProcessor.Modulate(siCur.GetGainPoints(0)),
TAtrac3MDCT::TGainModulator(), TAtrac3MDCT::TGainModulator(), TAtrac3MDCT::TGainModulator()});
} else if (pos == 1024 + 256) {
TAtrac3Data::SubbandInfo siCur;
siCur.AddSubbandCurve(0, {{1, 0}});
mdct.Mdct(specs.data(), p, { mdct.GainProcessor.Modulate(siCur.GetGainPoints(0)),
TAtrac3MDCT::TGainModulator(), TAtrac3MDCT::TGainModulator(), TAtrac3MDCT::TGainModulator()});
} else if (pos == 2048) {
TAtrac3Data::SubbandInfo siCur;
siCur.AddSubbandCurve(0, {{4, 2}});
siCur.AddSubbandCurve(0, {{1, 5}});
mdct.Mdct(specs.data(), p, { mdct.GainProcessor.Modulate(siCur.GetGainPoints(0)),
TAtrac3MDCT::TGainModulator(), TAtrac3MDCT::TGainModulator(), TAtrac3MDCT::TGainModulator()});
} else {
mdct.Mdct(specs.data(), p);
}
double* t[4] = { buff.Band0Res, buff.Band1Res, buff.Band2Res, buff.Band3Res };
if (pos == 256) { //restore gain modulation
TAtrac3Data::SubbandInfo siCur;
TAtrac3Data::SubbandInfo siNext;
siNext.AddSubbandCurve(0, {{3, 2}});
mdct.Midct(specs.data(), t, {mdct.GainProcessor.Demodulate(siCur.GetGainPoints(0), siNext.GetGainPoints(0)),
TAtrac3MDCT::TAtrac3GainProcessor::TGainDemodulator(),
TAtrac3MDCT::TAtrac3GainProcessor::TGainDemodulator(),
TAtrac3MDCT::TAtrac3GainProcessor::TGainDemodulator()});
} else if (pos == 512) {
TAtrac3Data::SubbandInfo siNext;
TAtrac3Data::SubbandInfo siCur;
siCur.AddSubbandCurve(0, {{3, 2}});
mdct.Midct(specs.data(), t, {mdct.GainProcessor.Demodulate(siCur.GetGainPoints(0), siNext.GetGainPoints(0)),
TAtrac3MDCT::TAtrac3GainProcessor::TGainDemodulator(),
TAtrac3MDCT::TAtrac3GainProcessor::TGainDemodulator(),
TAtrac3MDCT::TAtrac3GainProcessor::TGainDemodulator()});
} else if (pos == 1024) {
TAtrac3Data::SubbandInfo siCur;
TAtrac3Data::SubbandInfo siNext;
siNext.AddSubbandCurve(0, {{3, 2}});
siNext.AddSubbandCurve(0, {{2, 5}});
mdct.Midct(specs.data(), t, {mdct.GainProcessor.Demodulate(siCur.GetGainPoints(0), siNext.GetGainPoints(0)),
TAtrac3MDCT::TAtrac3GainProcessor::TGainDemodulator(),
TAtrac3MDCT::TAtrac3GainProcessor::TGainDemodulator(),
TAtrac3MDCT::TAtrac3GainProcessor::TGainDemodulator()});
} else if (pos == 1024 + 256) {
TAtrac3Data::SubbandInfo siNext;
TAtrac3Data::SubbandInfo siCur;
siNext.AddSubbandCurve(0, {{1, 0}});
siCur.AddSubbandCurve(0, {{3, 2}});
siCur.AddSubbandCurve(0, {{2, 5}});
mdct.Midct(specs.data(), t, {mdct.GainProcessor.Demodulate(siCur.GetGainPoints(0), siNext.GetGainPoints(0)),
TAtrac3MDCT::TAtrac3GainProcessor::TGainDemodulator(),
TAtrac3MDCT::TAtrac3GainProcessor::TGainDemodulator(),
TAtrac3MDCT::TAtrac3GainProcessor::TGainDemodulator()});
} else if (pos == 1024 + 256 + 256) {
TAtrac3Data::SubbandInfo siNext;
TAtrac3Data::SubbandInfo siCur;
siCur.AddSubbandCurve(0, {{1, 0}});
mdct.Midct(specs.data(), t, {mdct.GainProcessor.Demodulate(siCur.GetGainPoints(0), siNext.GetGainPoints(0)),
TAtrac3MDCT::TAtrac3GainProcessor::TGainDemodulator(),
TAtrac3MDCT::TAtrac3GainProcessor::TGainDemodulator(),
TAtrac3MDCT::TAtrac3GainProcessor::TGainDemodulator()});
} else if (pos == 2048) {
TAtrac3Data::SubbandInfo siCur;
TAtrac3Data::SubbandInfo siNext;
siNext.AddSubbandCurve(0, {{4, 2}});
siNext.AddSubbandCurve(0, {{1, 5}});
mdct.Midct(specs.data(), t, {mdct.GainProcessor.Demodulate(siCur.GetGainPoints(0), siNext.GetGainPoints(0)),
TAtrac3MDCT::TAtrac3GainProcessor::TGainDemodulator(),
TAtrac3MDCT::TAtrac3GainProcessor::TGainDemodulator(),
TAtrac3MDCT::TAtrac3GainProcessor::TGainDemodulator()});
} else if (pos == 2048 + 256) {
TAtrac3Data::SubbandInfo siNext;
TAtrac3Data::SubbandInfo siCur;
siCur.AddSubbandCurve(0, {{4, 2}});
siCur.AddSubbandCurve(0, {{1, 5}});
mdct.Midct(specs.data(), t, {mdct.GainProcessor.Demodulate(siCur.GetGainPoints(0), siNext.GetGainPoints(0)),
TAtrac3MDCT::TAtrac3GainProcessor::TGainDemodulator(),
TAtrac3MDCT::TAtrac3GainProcessor::TGainDemodulator(),
TAtrac3MDCT::TAtrac3GainProcessor::TGainDemodulator()});
} else {
mdct.Midct(specs.data(), t);
}
memcpy(signalRes.data() + pos, buff.Band0Res, workSz * sizeof(double));
}
for (int i = workSz; i < len; ++i) {
//std::cout << "res: " << i << " " << signalRes[i] << std::endl;
EXPECT_NEAR(signal[i - workSz], signalRes[i], 0.00000001);
}
}
TEST(TAtrac3MDCT, TAtrac3MDCTWindow) {
TWindowTest test;
test.RunTest();
}
|
