sam/sfizz
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Add interpolator tests

Browse source
This commit is contained in:
Paul Ferrand 2020-05-28 23:33:48 +02:00 • committed by Jean Pierre Cimalando
parent 4f0414cb4a
commit c48e14ee2b
2 changed files with 72 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
tests/CMakeLists.txt
View file

@ -17,6 +17,7 @@ set(SFIZZ_TEST_SOURCES
FilesT.cpp
MidiStateT.cpp
OnePoleFilterT.cpp
InterpolatorsT.cpp
RegionActivationT.cpp
RegionValueComputationsT.cpp
# If we're tweaking the curves this kind of tests does not make sense

71
tests/InterpolatorsT.cpp Normal file
View file

@ -0,0 +1,71 @@
// SPDX-License-Identifier: BSD-2-Clause
// This code is part of the sfizz library and is licensed under a BSD 2-clause
// license. You should have receive a LICENSE.md file along with the code.
// If not, contact the sfizz maintainers at https://github.com/sfztools/sfizz
#include "sfizz/Interpolators.h"
#include "catch2/catch.hpp"
#include <algorithm>
using namespace Catch::literals;
TEST_CASE("[Interpolators] Sample at points")
{
std::array<float, 32> values;
std::iota(values.begin(), values.end(), 0.0f);
for (unsigned i = 2; i < values.size() - 2; ++i) {
REQUIRE(sfz::interpolate<sfz::InterpolatorModel::kInterpolatorLinear>(&values[i], 0.0f)
== Approx(values[i]).margin(1e-2));
REQUIRE(sfz::interpolate<sfz::InterpolatorModel::kInterpolatorHermite3>(&values[i], 0.0f)
== Approx(values[i]).margin(1e-2));
REQUIRE(sfz::interpolate<sfz::InterpolatorModel::kInterpolatorBspline3>(&values[i], 0.0f)
== Approx(values[i]).margin(1e-2));
}
}
TEST_CASE("[Interpolators] Sample next")
{
std::array<float, 32> values;
std::iota(values.begin(), values.end(), 0.0f);
for (unsigned i = 2; i < values.size() - 2; ++i) {
REQUIRE(sfz::interpolate<sfz::InterpolatorModel::kInterpolatorLinear>(&values[i], 1.0f)
== Approx(values[i + 1]).margin(1e-2));
REQUIRE(sfz::interpolate<sfz::InterpolatorModel::kInterpolatorHermite3>(&values[i], 1.0f)
== Approx(values[i + 1]).margin(1e-2));
REQUIRE(sfz::interpolate<sfz::InterpolatorModel::kInterpolatorBspline3>(&values[i], 1.0f)
== Approx(values[i + 1]).margin(1e-2));
}
}
TEST_CASE("[Interpolators] Straight line")
{
std::array<float, 32> values;
std::iota(values.begin(), values.end(), 0.0f);
for (unsigned i = 2; i < values.size() - 2; ++i) {
REQUIRE(sfz::interpolate<sfz::InterpolatorModel::kInterpolatorLinear>(&values[i], 0.5f)
== Approx(values[i] + 0.5f).margin(1e-2));
REQUIRE(sfz::interpolate<sfz::InterpolatorModel::kInterpolatorHermite3>(&values[i], 0.5f)
== Approx(values[i] + 0.5f).margin(1e-2));
REQUIRE(sfz::interpolate<sfz::InterpolatorModel::kInterpolatorBspline3>(&values[i], 0.5f)
== Approx(values[i] + 0.5f).margin(1e-2));
}
}
TEST_CASE("[Interpolators] Squares")
{
std::array<float, 32> x;
std::array<float, 32> y;
for (unsigned i = 0; i < x.size(); ++i) {
x[i] = static_cast<float>(i) / static_cast<float>(x.size());
y[i] = x[i] * x[i];
}
for (unsigned i = 2; i < x.size() - 2; ++i) {
const auto half_x = x[i] + 0.5f / static_cast<float>(x.size());
const auto expected = (half_x) * (half_x);
REQUIRE(sfz::interpolate<sfz::InterpolatorModel::kInterpolatorHermite3>(&y[i], 0.5f)
== Approx(expected).margin(1e-2));
REQUIRE(sfz::interpolate<sfz::InterpolatorModel::kInterpolatorBspline3>(&y[i], 0.5f)
== Approx(expected).margin(1e-2));
}
}