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/*
* Copyright (c) 2017 The WebRTC 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 "modules/audio_processing/aec3/aec3_fft.h"
#include <algorithm>
#include "test/gmock.h"
#include "test/gtest.h"
namespace webrtc {
#if RTC_DCHECK_IS_ON && GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)
// Verifies that the check for non-null input in Fft works.
TEST(Aec3Fft, NullFftInput) {
Aec3Fft fft;
FftData X;
EXPECT_DEATH(fft.Fft(nullptr, &X), "");
}
// Verifies that the check for non-null input in Fft works.
TEST(Aec3Fft, NullFftOutput) {
Aec3Fft fft;
std::array<float, kFftLength> x;
EXPECT_DEATH(fft.Fft(&x, nullptr), "");
}
// Verifies that the check for non-null output in Ifft works.
TEST(Aec3Fft, NullIfftOutput) {
Aec3Fft fft;
FftData X;
EXPECT_DEATH(fft.Ifft(X, nullptr), "");
}
// Verifies that the check for non-null output in ZeroPaddedFft works.
TEST(Aec3Fft, NullZeroPaddedFftOutput) {
Aec3Fft fft;
std::array<float, kFftLengthBy2> x;
EXPECT_DEATH(fft.ZeroPaddedFft(x, Aec3Fft::Window::kRectangular, nullptr),
"");
}
// Verifies that the check for input length in ZeroPaddedFft works.
TEST(Aec3Fft, ZeroPaddedFftWrongInputLength) {
Aec3Fft fft;
FftData X;
std::array<float, kFftLengthBy2 - 1> x;
EXPECT_DEATH(fft.ZeroPaddedFft(x, Aec3Fft::Window::kRectangular, &X), "");
}
// Verifies that the check for non-null output in PaddedFft works.
TEST(Aec3Fft, NullPaddedFftOutput) {
Aec3Fft fft;
std::array<float, kFftLengthBy2> x;
std::array<float, kFftLengthBy2> x_old;
EXPECT_DEATH(fft.PaddedFft(x, x_old, nullptr), "");
}
// Verifies that the check for input length in PaddedFft works.
TEST(Aec3Fft, PaddedFftWrongInputLength) {
Aec3Fft fft;
FftData X;
std::array<float, kFftLengthBy2 - 1> x;
std::array<float, kFftLengthBy2> x_old;
EXPECT_DEATH(fft.PaddedFft(x, x_old, &X), "");
}
// Verifies that the check for length in the old value in PaddedFft works.
TEST(Aec3Fft, PaddedFftWrongOldValuesLength) {
Aec3Fft fft;
FftData X;
std::array<float, kFftLengthBy2> x;
std::array<float, kFftLengthBy2 - 1> x_old;
EXPECT_DEATH(fft.PaddedFft(x, x_old, &X), "");
}
#endif
// Verifies that Fft works as intended.
TEST(Aec3Fft, Fft) {
Aec3Fft fft;
FftData X;
std::array<float, kFftLength> x;
x.fill(0.f);
fft.Fft(&x, &X);
EXPECT_THAT(X.re, ::testing::Each(0.f));
EXPECT_THAT(X.im, ::testing::Each(0.f));
x.fill(0.f);
x[0] = 1.f;
fft.Fft(&x, &X);
EXPECT_THAT(X.re, ::testing::Each(1.f));
EXPECT_THAT(X.im, ::testing::Each(0.f));
x.fill(1.f);
fft.Fft(&x, &X);
EXPECT_EQ(128.f, X.re[0]);
std::for_each(X.re.begin() + 1, X.re.end(),
[](float a) { EXPECT_EQ(0.f, a); });
EXPECT_THAT(X.im, ::testing::Each(0.f));
}
// Verifies that InverseFft works as intended.
TEST(Aec3Fft, Ifft) {
Aec3Fft fft;
FftData X;
std::array<float, kFftLength> x;
X.re.fill(0.f);
X.im.fill(0.f);
fft.Ifft(X, &x);
EXPECT_THAT(x, ::testing::Each(0.f));
X.re.fill(1.f);
X.im.fill(0.f);
fft.Ifft(X, &x);
EXPECT_EQ(64.f, x[0]);
std::for_each(x.begin() + 1, x.end(), [](float a) { EXPECT_EQ(0.f, a); });
X.re.fill(0.f);
X.re[0] = 128;
X.im.fill(0.f);
fft.Ifft(X, &x);
EXPECT_THAT(x, ::testing::Each(64.f));
}
// Verifies that InverseFft and Fft work as intended.
TEST(Aec3Fft, FftAndIfft) {
Aec3Fft fft;
FftData X;
std::array<float, kFftLength> x;
std::array<float, kFftLength> x_ref;
int v = 0;
for (int k = 0; k < 20; ++k) {
for (size_t j = 0; j < x.size(); ++j) {
x[j] = v++;
x_ref[j] = x[j] * 64.f;
}
fft.Fft(&x, &X);
fft.Ifft(X, &x);
for (size_t j = 0; j < x.size(); ++j) {
EXPECT_NEAR(x_ref[j], x[j], 0.001f);
}
}
}
// Verifies that ZeroPaddedFft work as intended.
TEST(Aec3Fft, ZeroPaddedFft) {
Aec3Fft fft;
FftData X;
std::array<float, kFftLengthBy2> x_in;
std::array<float, kFftLength> x_ref;
std::array<float, kFftLength> x_out;
int v = 0;
x_ref.fill(0.f);
for (int k = 0; k < 20; ++k) {
for (size_t j = 0; j < x_in.size(); ++j) {
x_in[j] = v++;
x_ref[j + kFftLengthBy2] = x_in[j] * 64.f;
}
fft.ZeroPaddedFft(x_in, Aec3Fft::Window::kRectangular, &X);
fft.Ifft(X, &x_out);
for (size_t j = 0; j < x_out.size(); ++j) {
EXPECT_NEAR(x_ref[j], x_out[j], 0.1f);
}
}
}
// Verifies that ZeroPaddedFft work as intended.
TEST(Aec3Fft, PaddedFft) {
Aec3Fft fft;
FftData X;
std::array<float, kFftLengthBy2> x_in;
std::array<float, kFftLength> x_out;
std::array<float, kFftLengthBy2> x_old;
std::array<float, kFftLengthBy2> x_old_ref;
std::array<float, kFftLength> x_ref;
int v = 0;
x_old.fill(0.f);
for (int k = 0; k < 20; ++k) {
for (size_t j = 0; j < x_in.size(); ++j) {
x_in[j] = v++;
}
std::copy(x_old.begin(), x_old.end(), x_ref.begin());
std::copy(x_in.begin(), x_in.end(), x_ref.begin() + kFftLengthBy2);
std::copy(x_in.begin(), x_in.end(), x_old_ref.begin());
std::for_each(x_ref.begin(), x_ref.end(), [](float& a) { a *= 64.f; });
fft.PaddedFft(x_in, x_old, &X);
fft.Ifft(X, &x_out);
for (size_t j = 0; j < x_out.size(); ++j) {
EXPECT_NEAR(x_ref[j], x_out[j], 0.1f);
}
EXPECT_EQ(x_old_ref, x_old);
}
}
} // namespace webrtc