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
|
#include "mdct.h"
#include <gtest/gtest.h>
#include <vector>
using std::vector;
using namespace NMDCT;
static vector<double> mdct(double* x, int N) {
vector<double> res;
for (int k = 0; k < N; k++) {
double sum = 0;
for (int n = 0; n < 2 * N; n++)
sum += x[n]* cos((M_PI/N) * ((double)n + 0.5 + N/2) * ((double)k + 0.5));
res.push_back(sum);
}
return res;
}
TEST(TBitStream, MDCT64) {
const int N = 64;
TMDCT<N> transform(N);
vector<double> src(N);
for (int i = 0; i < N; i++) {
src[i] = i;
}
const vector<double> res1 = mdct(&src[0], N/2);
const vector<double> res2 = transform(&src[0]);
EXPECT_EQ(res1.size(), res2.size());
for (int i = 0; i < res1.size(); i++) {
EXPECT_NEAR(res1[i], res2[i], 0.0000000001);
}
}
TEST(TBitStream, MDCT128) {
const int N = 128;
TMDCT<N> transform(N);
vector<double> src(N);
for (int i = 0; i < N; i++) {
src[i] = i;
}
const vector<double> res1 = mdct(&src[0], N/2);
const vector<double> res2 = transform(&src[0]);
EXPECT_EQ(res1.size(), res2.size());
for (int i = 0; i < res1.size(); i++) {
EXPECT_NEAR(res1[i], res2[i], 0.0000000001);
}
}
TEST(TBitStream, MDCT256) {
const int N = 256;
TMDCT<N> transform(N);
vector<double> src(N);
for (int i = 0; i < N; i++) {
src[i] = i;
}
const vector<double> res1 = mdct(&src[0], N/2);
const vector<double> res2 = transform(&src[0]);
EXPECT_EQ(res1.size(), res2.size());
for (int i = 0; i < res1.size(); i++) {
EXPECT_NEAR(res1[i], res2[i], 0.00000001);
}
}
|
