Page Menu
Home
c4science
Search
Configure Global Search
Log In
Files
F65097684
test_fft.cpp
No One
Temporary
Actions
Download File
Edit File
Delete File
View Transforms
Subscribe
Mute Notifications
Award Token
Subscribers
None
File Metadata
Details
File Info
Storage
Attached
Created
Fri, May 31, 19:15
Size
9 KB
Mime Type
text/x-c++
Expires
Sun, Jun 2, 19:15 (1 d, 23 h)
Engine
blob
Format
Raw Data
Handle
18003577
Attached To
rTAMAAS tamaas
test_fft.cpp
View Options
/**
* @file
* @section LICENSE
*
* Copyright (©) 2016-19 EPFL (École Polytechnique Fédérale de Lausanne),
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
#include "fft_plan_manager.hh"
#include "grid.hh"
#include "grid_hermitian.hh"
#include "grid_view.hh"
#include "test.hh"
#ifdef USE_PYTHON
#include <pybind11/embed.h>
#include <pybind11/numpy.h>
#include <pybind11/pybind11.h>
#endif
using namespace tamaas;
using fft = fftw::helper<Real>;
/* -------------------------------------------------------------------------- */
template <typename T>
struct span {
T* data;
std::size_t size;
const T* begin() const { return data; }
const T* end() const { return data + size; }
};
TEST(TestFFTInterface, FFT1D) {
constexpr UInt size = 100000;
Real* data = fft::alloc_real(size);
fft::complex* solution = fft::alloc_complex(size / 2 + 1);
std::iota(data, data + size, 0);
auto solution_plan =
fftw::plan_1d_forward(size, data, solution, FFTW_ESTIMATE);
fftw::execute(solution_plan);
Grid<Real, 1> grid({size}, 1);
std::iota(grid.begin(), grid.end(), 0);
GridHermitian<Real, 1> result({size / 2 + 1}, 1);
FFTPlanManager::get().createPlan(grid, result).forwardTransform();
#ifdef USE_CUDA
cudaDeviceSynchronize();
#endif
ASSERT_TRUE(compare(result, span<fft::complex>{solution, size / 2 + 1},
AreComplexEqual()))
<< "1D FFTW transform failed";
fftw::destroy(solution_plan);
FFTPlanManager::get().destroyPlan(grid, result);
}
/* -------------------------------------------------------------------------- */
TEST(TestFFTInterface, FFT2D) {
constexpr UInt size = 10;
Real* data = fft::alloc_real(size * size);
fft::complex* solution = fft::alloc_complex(size * (size / 2 + 1));
std::iota(data, data + (size * size), 0);
auto solution_plan =
fftw::plan_2d_forward(size, size, data, solution, FFTW_ESTIMATE);
fftw::execute(solution_plan);
Grid<Real, 2> grid({size, size}, 1);
std::iota(grid.begin(), grid.end(), 0);
GridHermitian<Real, 2> result({size, size / 2 + 1}, 1);
FFTPlanManager::get().createPlan(grid, result).forwardTransform();
#ifdef USE_CUDA
cudaDeviceSynchronize();
#endif
for (UInt i = 0; i < size * (size / 2+ 1); ++i) {
std::cout << result(i) << " " << solution[i][0] << ' ' << solution[i][1] << '\n';
}
ASSERT_TRUE(compare(result,
span<fft::complex>{solution, size * (size / 2 + 1)},
AreComplexEqual()))
<< "2D FFTW transform failed";
fftw::destroy(solution_plan);
FFTPlanManager::get().destroyPlan(grid, result);
}
/* -------------------------------------------------------------------------- */
TEST(TestFFTInterface, FFT1D2Comp) {
constexpr UInt size = 20;
/// 1D single component FFT should be working here
Grid<Real, 1> grid({size}, 2), data({size}, 1);
std::iota(grid.begin(), grid.end(), 0);
std::iota(data.begin(), data.end(), 0);
GridHermitian<Real, 1> result({size / 2 + 1}, 2), solution({size / 2 + 1}, 1);
FFTPlanManager::get().createPlan(grid, result).forwardTransform();
#ifdef USE_CUDA
cudaDeviceSynchronize();
#endif
auto& plan = FFTPlanManager::get().createPlan(data, solution);
std::iota(data.begin(), data.end(), 0);
data *= 2;
plan.forwardTransform();
ASSERT_TRUE(
compare(make_component_view(result, 0), solution, AreComplexEqual()))
<< "1D FFTW transform with 2 components failed on 1st component";
data += 1;
plan.forwardTransform();
ASSERT_TRUE(
compare(make_component_view(result, 1), solution, AreComplexEqual()))
<< "1D FFTW transform with 2 components failed on 2nd component";
FFTPlanManager::get().destroyPlan(grid, result);
}
/* -------------------------------------------------------------------------- */
TEST(TestFFTInterface, FFT2D3Comp) {
constexpr UInt size = 20;
/// 2D single component FFT should be working here
Grid<Real, 2> grid({size, size}, 3), data({size, size}, 1);
std::iota(grid.begin(), grid.end(), 0);
std::iota(data.begin(), data.end(), 0);
data *= 3;
GridHermitian<Real, 2> result({size, size / 2 + 1}, 3),
solution({size, size / 2 + 1}, 1);
FFTPlanManager::get().createPlan(grid, result).forwardTransform();
auto& plan = FFTPlanManager::get().createPlan(data, solution);
#ifdef USE_CUDA
cudaDeviceSynchronize();
#endif
for (UInt i = 0; i < 3; ++i) {
plan.forwardTransform();
ASSERT_TRUE(
compare(make_component_view(result, i), solution, AreComplexEqual()))
<< "2D FFTW transform with 3 components failed on " << i
<< "th component";
data += 1;
}
FFTPlanManager::get().destroyPlan(grid, result);
}
/* -------------------------------------------------------------------------- */
TEST(TestFFTInterface, FFT2DViewTransform) {
constexpr UInt size = 20;
Grid<Real, 2> data({size, size}, 1);
GridHermitian<Real, 2> solution({size, size / 2 + 1}, 1);
std::iota(std::begin(data), std::end(data), 0);
FFTPlanManager::get().createPlan(data, solution).forwardTransform();
Grid<Real, 2> grid({size, size}, 3);
auto view = make_component_view(grid, 1);
std::iota(view.begin(), view.end(), 0);
GridHermitian<Real, 2> result({size, size / 2 + 1}, 1);
FFTPlanManager::get().createPlan(view, result).forwardTransform();
ASSERT_TRUE(compare(result, solution, AreComplexEqual()))
<< "Fourier transform on component view fail";
}
/* -------------------------------------------------------------------------- */
TEST(TestFFTInterface, FFTI1D2Comp) {
constexpr UInt size = 20;
Grid<Real, 1> grid({size}, 2);
std::iota(grid.begin(), grid.end(), 0);
GridHermitian<Real, 1> grid_hermitian({size / 2 + 1}, 2);
Grid<Real, 1> result({size}, 2);
FFTPlanManager::get().createPlan(grid, grid_hermitian).forwardTransform();
FFTPlanManager::get().createPlan(result, grid_hermitian).backwardTransform();
#ifdef USE_CUDA
cudaDeviceSynchronize();
#endif
ASSERT_TRUE(compare(grid, result, AreFloatEqual()))
<< "1D FFTI transform with 2 components failed";
FFTPlanManager::get().destroyPlan(grid, grid_hermitian);
FFTPlanManager::get().destroyPlan(result, grid_hermitian);
}
/* -------------------------------------------------------------------------- */
TEST(TestFFTInterface, FFTI2D3Comp) {
constexpr UInt size = 20;
Grid<Real, 2> grid({size, size}, 3);
std::iota(grid.begin(), grid.end(), 0);
GridHermitian<Real, 2> grid_hermitian({size, size / 2 + 1}, 3);
Grid<Real, 2> result({size, size}, 3);
FFTPlanManager::get().createPlan(grid, grid_hermitian).forwardTransform();
FFTPlanManager::get().createPlan(result, grid_hermitian).backwardTransform();
#ifdef USE_CUDA
cudaDeviceSynchronize();
#endif
ASSERT_TRUE(compare(grid, result, AreFloatEqual()))
<< "2D FFTI transform with 3 components failed";
FFTPlanManager::get().destroyPlan(grid, grid_hermitian);
FFTPlanManager::get().destroyPlan(result, grid_hermitian);
}
/* -------------------------------------------------------------------------- */
#ifdef USE_PYTHON
namespace py = pybind11;
TEST(TestFFTInterface, Frequencies1D) {
std::array<UInt, 1> sizes = {{10}};
auto freq = FFTransform<Real, 1>::computeFrequencies<false>(sizes);
py::module fftfreq = py::module::import("fftfreq");
std::vector<Real> reference(freq.dataSize());
py::array py_arg(reference.size(), reference.data(), py::none());
fftfreq.attr("frequencies1D")(py_arg);
ASSERT_TRUE(compare(reference, freq, AreFloatEqual()))
<< "Non hermitian frequencies are wrong";
auto hfreq = FFTransform<Real, 1>::computeFrequencies<true>(sizes);
std::iota(reference.begin(), reference.end(), 0);
ASSERT_TRUE(compare(reference, hfreq, AreFloatEqual()))
<< "Hermitian frequencies are wrong";
}
TEST(TestFFTInterface, Frequencies2D) {
std::array<UInt, 2> sizes = {{10, 10}};
auto freq = FFTransform<Real, 2>::computeFrequencies<false>(sizes);
py::module fftfreq = py::module::import("fftfreq");
std::vector<Real> reference(freq.dataSize());
py::array py_arg({10, 10, 2}, reference.data(), py::none());
fftfreq.attr("frequencies2D")(py_arg);
ASSERT_TRUE(compare(reference, freq, AreFloatEqual()))
<< "Non hermitian frequencies are wrong";
auto hfreq = FFTransform<Real, 2>::computeFrequencies<true>(sizes);
fftfreq.attr("hfrequencies2D")(py_arg);
ASSERT_TRUE(compare(reference, hfreq, AreFloatEqual()))
<< "Hermitian frequencies are wrong";
}
#endif
Event Timeline
Log In to Comment