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Commit 9846e31a authored by Martin Reinecke's avatar Martin Reinecke

big bunch of reorganization

parent 43d0315c
......@@ -2,7 +2,6 @@ image: $CONTAINER_TEST_IMAGE
- build_docker
......@@ -21,13 +20,13 @@ test_gcc:
stage: testing
- python3 install --user -f
- pytest-3 -q pypocketfft/test pysharp/test pyHealpix/test nifty_gridder/test pyinterpol_ng/test
- pytest-3 -q fft/test sht/test healpix/test wgridder/test totalconvolve/test
stage: testing
- CC="clang -fsized-deallocation" python3 install --user -f
- pytest-3 -q pypocketfft/test pysharp/test pyHealpix/test nifty_gridder/test pyinterpol_ng/test
- pytest-3 -q fft/test sht/test healpix/test wgridder/test totalconvolve/test
stage: build_tarballs
prune .
include src/mr_util/infra/aligned_array.h
#include src/mr_util/infra/
#include src/mr_util/infra/communication.h
include src/mr_util/infra/error_handling.h
include src/mr_util/infra/mav.h
include src/mr_util/infra/simd.h
......@@ -13,8 +11,6 @@ include src/mr_util/infra/system.h
include src/mr_util/infra/
include src/mr_util/infra/threading.h
include src/mr_util/infra/timers.h
#include src/mr_util/infra/
#include src/mr_util/infra/types.h
include src/mr_util/infra/useful_macros.h
include src/mr_util/bindings/pybind_utils.h
......@@ -52,15 +48,17 @@ include src/mr_util/healpix/healpix_base.h
include src/mr_util/healpix/
include src/mr_util/healpix/healpix_tables.h
include pypocketfft/
include python/
include python/
include python/
include python/gridder_cxx.h
include python/
include python/alm.h
include python/totalconvolve.h
include python/
include pysharp/
include pyHealpix/
include nifty_gridder/gridder_cxx.h
include nifty_gridder/
include pyinterpol_ng/alm.h
include pyinterpol_ng/interpol_ng.h
include pyinterpol_ng/
include python/test/
include python/test/
include python/test/
include python/test/
include python/test/
DUCC 0.1
This is a collection of basic programming tools which can be handy in many
### Requirements
- [Python 3](
- [pybind11](
- a C++17-capable C++ compiler (e.g. g++ from version 7 on or a recent clang++)
### Sources
The current version of DUCC can be obtained by cloning the repository via
git clone
### Installation
In the following, we assume a Debian-based distribution. For other
distributions, the "apt" lines will need slight changes.
DUCC and its mandatory dependencies can be installed via:
sudo apt-get install git python3 python3-pip python3-dev python3-pybind11 pybind11-dev
pip3 install --user git+
DUCC components
This package provides Fast Fourier, trigonometric and Hartley transforms with a
simple Python interface.
The central algorithms are derived from Paul Swarztrauber's FFTPACK code
- supports fully complex and half-complex (i.e. complex-to-real and
real-to-complex) FFTs, discrete sine/cosine transforms and Hartley transforms
- achieves very high accuracy for all transforms
- supports multidimensional arrays and selection of the axes to be transformed
- supports single, double, and long double precision
- makes use of CPU vector instructions when performing 2D and higher-dimensional
- supports prime-length transforms without degrading to O(N**2) performance
- has optional multi-threading support for multidimensional transforms
This package provides efficient spherical harmonic trasforms (SHTs). Its code
is derived from `libsharp`.
This library provides Python bindings for the most important
functionality in Healpix C++. The design goals are
- similarity to the C++ interface (while respecting some Python peculiarities)
- simplicity (no optional function parameters)
- low function calling overhead
Library for high-accuracy 4pi convolution on the sphere, which generates a
total convolution data cube from a set of sky and beam `a_lm` and computes
interpolated values for a given list of detector pointings.
Algorithmic details:
- the code uses `ducc.sht` SHTs to compute the data cube
- shared-memory parallelization is provided via standard C++ threads.
- for interpolation, the algorithm and kernel described in are used. This allows very efficient
interpolation with user-adjustable accuracy.
Library for high-accuracy gridding/degridding of radio interferometry datasets
Programming aspects
- written in C++11, fully portable
- shared-memory parallelization via and C++ threads.
- Python interface available
- kernel computation is performed on the fly, avoiding inaccuracies
due to table lookup and reducing overall memory bandwidth
Numerical aspects
- uses the analytical gridding kernel presented in
- uses the "improved W-stacking method" described in (p. 139ff)
- in combination these two aspects allow extremely accurate gridding/degridding
operations (L2 error compared to explicit DFTs can go below 1e-12) with
reasonable resource consumption
# Elementary demo for pysharp interface using a Gauss-Legendre grid
# Elementary demo for the ducc_0_1.sht interface using a Gauss-Legendre grid
# I'm not sure I have a perfect equivalent for the DH grid(s) at the moment,
# since they apparently do not include the South Pole. The Clenshaw-Curtis
# and Fejer quadrature rules are very similar (see the documentation in
......@@ -13,19 +13,19 @@
#include "mr_util/healpix/"
#include <pybind11/pybind11.h>
#include "pysharp/"
#include "pypocketfft/"
#include "pyinterpol_ng/"
#include "nifty_gridder/"
#include "pyHealpix/"
#include "python/"
#include "python/"
#include "python/"
#include "python/"
#include "python/"
using namespace mr;
......@@ -21,7 +21,7 @@
namespace mr {
namespace detail_pypocketfft {
namespace detail_pymodule_fft {
namespace {
......@@ -346,7 +346,7 @@ PyObject * good_size(PyObject * /*self*/, PyObject * args)
real ? util1d::good_size_real(n) : util1d::good_size_cmplx(n));
const char *pypocketfft_DS = R"""(Fast Fourier and Hartley transforms.
const char *fft_DS = R"""(Fast Fourier and Hartley transforms.
This module supports
- single, double, and long double precision
......@@ -649,11 +649,11 @@ out : int
} // unnamed namespace
void add_pypocketfft(py::module &msup)
void add_fft(py::module &msup)
using namespace pybind11::literals;
auto m = msup.def_submodule("fft");
m.doc() = pypocketfft_DS;
m.doc() = fft_DS;
m.def("c2c", c2c, c2c_DS, "a"_a, "axes"_a=None, "forward"_a=true,
"inorm"_a=0, "out"_a=None, "nthreads"_a=1);
m.def("r2c", r2c, r2c_DS, "a"_a, "axes"_a=None, "forward"_a=true,
......@@ -678,6 +678,6 @@ void add_pypocketfft(py::module &msup)
using detail_pypocketfft::add_pypocketfft;
using detail_pymodule_fft::add_fft;
......@@ -41,7 +41,7 @@
namespace mr {
namespace detail_pyHealpix {
namespace detail_pymodule_healpix {
using namespace std;
using namespace mr;
......@@ -245,7 +245,7 @@ py::array local_v_angle (const py::array &v1, const py::array &v2)
return move(angle);
const char *pyHealpix_DS = R"""(
const char *healpix_DS = R"""(
Python interface for some of the HEALPix C++ functionality
All angles are interpreted as radians.
......@@ -345,11 +345,11 @@ that their last dimension is removed.
The employed algorithm is highly accurate, even for angles close to 0 or pi.
void add_pyHealpix(py::module &msup)
void add_healpix(py::module &msup)
using namespace pybind11::literals;
auto m = msup.def_submodule("healpix");
m.doc() = pyHealpix_DS;
m.doc() = healpix_DS;
py::class_<Pyhpbase> (m, "Healpix_Base", py::module_local())
.def(py::init<int,const string &>(),"nside"_a,"scheme"_a)
......@@ -385,6 +385,6 @@ void add_pyHealpix(py::module &msup)
using detail_pyHealpix::add_pyHealpix;
using detail_pymodule_healpix::add_healpix;
......@@ -44,7 +44,7 @@
namespace mr {
namespace detail_pysharp {
namespace detail_pymodule_sht {
using namespace std;
using namespace mr;
......@@ -188,7 +188,7 @@ template<typename T> class py_sharpjob
const char *pysharp_DS = R"""(
const char *sht_DS = R"""(
Python interface for some of the libsharp functionality
Error conditions are reported by raising exceptions.
......@@ -268,11 +268,11 @@ py::array py_upsample_to_cc(const py::array &in, size_t nrings_out, bool has_np,
return move(out);
void add_pysharp(py::module &msup)
void add_sht(py::module &msup)
using namespace pybind11::literals;
auto m = msup.def_submodule("sht");
m.doc() = pysharp_DS;
m.doc() = sht_DS;
py::class_<py_sharpjob<double>> (m, "sharpjob_d", py::module_local())
......@@ -306,7 +306,7 @@ void add_pysharp(py::module &msup)
using detail_pysharp::add_pysharp;
using detail_pymodule_sht::add_sht;
......@@ -5,11 +5,11 @@
#include <pybind11/pybind11.h>
#include <pybind11/numpy.h>
#include "interpol_ng.h"
#include "totalconvolve.h"
namespace mr {
namespace detail_pyinterpol_ng {
namespace detail_pymodule_totalconvolve {
using namespace std;
using namespace mr;
......@@ -94,7 +94,7 @@ template<typename T> py::array pyrotate_alm(const py::array &alm_, int64_t lmax,
constexpr const char *pyinterpol_ng_DS = R"""(
constexpr const char *totalconvolve_DS = R"""(
Python interface for total convolution/interpolation library
All arrays containing spherical harmonic coefficients are assumed to have the
......@@ -234,12 +234,12 @@ Notes
- must be the last call to the object
void add_pyinterpol_ng(py::module &msup)
void add_totalconvolve(py::module &msup)
using namespace pybind11::literals;
auto m = msup.def_submodule("totalconvolve");
m.doc() = pyinterpol_ng_DS;
m.doc() = totalconvolve_DS;
using inter_d = PyInterpolator<double>;
py::class_<inter_d> (m, "PyInterpolator", py::module_local(), pyinterpolator_DS)
......@@ -272,6 +272,6 @@ void add_pyinterpol_ng(py::module &msup)
using detail_pyinterpol_ng::add_pyinterpol_ng;
using detail_pymodule_totalconvolve::add_totalconvolve;
......@@ -26,7 +26,7 @@
namespace mr {
namespace detail_nifty_gridder {
namespace detail_pymodule_wgridder {
using namespace std;
using namespace gridder;
......@@ -190,7 +190,7 @@ np.array((nrows, nchan,), dtype=complex of same precision as `dirty`)
the measurement set data.
void add_nifty_gridder(py::module &msup)
void add_wgridder(py::module &msup)
using namespace pybind11::literals;
auto m = msup.def_submodule("wgridder");
......@@ -205,6 +205,6 @@ void add_nifty_gridder(py::module &msup)
using detail_nifty_gridder::add_nifty_gridder;
using detail_pymodule_wgridder::add_wgridder;
......@@ -22,7 +22,7 @@ def _get_files_by_suffix(directory, suffix):
return list(itertools.chain.from_iterable(iterable_sources))
include_dirs = ['./src/',
include_dirs = ['.', './src/',
extra_compile_args = ['--std=c++17', '-march=native', '-ffast-math', '-O3']
......@@ -47,7 +47,7 @@ def get_extension_modules():
depfiles = _get_files_by_suffix('.', 'h') + _get_files_by_suffix('.', 'cc') + ['']
return [Extension(pkgname,
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