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adjusted code and test-cases for fixed-freq-interpolater

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k-a-z-u
2018-05-09 10:02:53 +02:00
parent caca1bf219
commit 1af670a0a9
2 changed files with 147 additions and 20 deletions
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71
tests/math/TestFixedFrequencyInterpolator.cpp
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@@ -4,8 +4,10 @@
#include "../Tests.h"
#include "../../math/FixedFrequencyInterpolator.h"
#include <fstream>
#include <random>
TEST(FixedFrequencyInterpolator, test) {
/*
TEST(FixedFrequencyInterpolator, testOLD) {
FixedFrequencyInterpolator<float> ffi(Timestamp::fromMS(10));
@@ -55,7 +57,74 @@ TEST(FixedFrequencyInterpolator, test) {
ASSERT_NEAR(data[18], x*240, d);
}
*/
TEST(FixedFrequencyInterpolator, testNEW) {
FixedFrequencyInterpolator<float> ffi(Timestamp::fromMS(9));
// randomly draw points along a line using random intervals
Timestamp pos;
std::minstd_rand gen;
std::uniform_int_distribution<int> dist(2, 65);
auto func = [] (const Timestamp ts) {
return 0.5 * ts.ms() + 12;
};
// compare the randomly drawn points against interpolated fixed-frequency interpolated versions
auto cb = [&] (const Timestamp ts, const float val) {
ASSERT_NEAR(val, func(ts), 0.001); // interpolated vs original position on line
};
// run
for (int i = 0; i < 200; ++i) {
const float y = func(pos);
ffi.add(pos, y, cb);
pos += Timestamp::fromMS(dist(gen));
}
}
TEST(FixedFrequencyInterpolator, testUpsample) {
FixedFrequencyInterpolator<float> ffi(Timestamp::fromMS(10));
int cnt = 0;
auto cb = [&] (const Timestamp ts, const float f) {
if (cnt == 0) {ASSERT_EQ(ts.ms(), 0); ASSERT_NEAR( 0, f, 0.001);}
if (cnt == 1) {ASSERT_EQ(ts.ms(), 10); ASSERT_NEAR( 10, f, 0.001);}
if (cnt == 10) {ASSERT_EQ(ts.ms(),100); ASSERT_NEAR(100, f, 0.001);}
++cnt;
};
// add two entries. one at t=0 one at t=100. must be up-sampled into 11 entries (t=0, t=10, t=100)
ffi.add(Timestamp::fromMS(0), 0, cb);
ffi.add(Timestamp::fromMS(101), 101, cb);
ASSERT_EQ(11, cnt);
}
TEST(FixedFrequencyInterpolator, testDownsample) {
FixedFrequencyInterpolator<float> ffi(Timestamp::fromMS(50));
int cnt = 0;
auto cb = [&] (const Timestamp ts, const float f) {
if (cnt == 0) {ASSERT_EQ(ts.ms(), 0); ASSERT_NEAR( 0, f, 0.001);}
if (cnt == 1) {ASSERT_EQ(ts.ms(), 50); ASSERT_NEAR( 50, f, 0.001);}
if (cnt == 2) {ASSERT_EQ(ts.ms(), 100); ASSERT_NEAR(100, f, 0.001);}
++cnt;
};
// add 100+ entries in 1 ms steps. must be downsampled to 3 entries (t=0, t=50, t=100)
for (int i = 0; i <= 101; ++i) {
ffi.add(Timestamp::fromMS(i), i, cb);
}
ASSERT_EQ(3, cnt);
}
#endif