Added possibility to get the periodic sequence to Python using the getSequence() method on class Periodic. Added a check that at least one of LogSweep or LinSweep should be activated.

src/lasp/dsp/lasp_siggen_impl.cpp

@@ -6,10 +6,10 @@
 // Signal generators implementation
 //////////////////////////////////////////////////////////////////////
 /* #define DEBUGTRACE_ENABLED */
-#include "debugtrace.hpp"
 #include "lasp_siggen_impl.h"
 #include "debugtrace.hpp"
 #include "lasp_mathtypes.h"
+#include <cassert>
 
 using rte = std::runtime_error;
 
@@ -26,13 +26,13 @@ vd Noise::genSignalUnscaled(us nframes) {
 }
 void Noise::resetImpl() {}
 
-Sine::Sine(const d freq) : omg(2 * arma::datum::pi * freq) { DEBUGTRACE_ENTER;}
+Sine::Sine(const d freq) : omg(2 * arma::datum::pi * freq) { DEBUGTRACE_ENTER; }
 
 vd Sine::genSignalUnscaled(const us nframes) {
   /* DEBUGTRACE_ENTER; */
   const d pi = arma::datum::pi;
   vd phase_vec =
-    arma::linspace(phase, phase + omg * (nframes - 1) / _fs, nframes);
+      arma::linspace(phase, phase + omg * (nframes - 1) / _fs, nframes);
   phase += omg * nframes / _fs;
   while (phase > 2 * arma::datum::pi) {
     phase -= 2 * pi;
@@ -43,10 +43,10 @@ vd Sine::genSignalUnscaled(const us nframes) {
 vd Periodic::genSignalUnscaled(const us nframes) {
 
   vd res(nframes);
-  if(_signal.size() == 0) {
+  if (_signal.size() == 0) {
     throw rte("No signal defined while calling");
   }
-  for(us i=0;i<nframes;i++) {
+  for (us i = 0; i < nframes; i++) {
     res(i) = _signal[_cur_pos];
     _cur_pos++;
     _cur_pos %= _signal.size();
@@ -55,20 +55,23 @@ vd Periodic::genSignalUnscaled(const us nframes) {
 }
 
 Sweep::Sweep(const d fl, const d fu, const d Ts, const d Tq, const us flags)
-  : fl_(fl), fu_(fu), Ts(Ts), Tq(Tq), flags(flags) {
-    if (fl <= 0 || fu < fl || Ts <= 0) {
-      throw std::runtime_error("Invalid sweep parameters");
-    }
-    if ((flags & ForwardSweep) && (flags & BackwardSweep)) {
-      throw std::runtime_error(
-          "Both forward and backward sweep flag set. Please only set either one "
-          "or none for a continuous sweep");
-    }
-    if ((flags & LinearSweep) && (flags & LogSweep)) {
-      throw std::runtime_error(
-          "Both logsweep and linear sweep flag set. Please only set either one.");
-    }
+    : fl_(fl), fu_(fu), Ts(Ts), Tq(Tq), flags(flags) {
+  if (fl <= 0 || fu < fl || Ts <= 0) {
+    throw rte("Invalid sweep parameters");
   }
+  if ((flags & ForwardSweep) && (flags & BackwardSweep)) {
+    throw rte(
+        "Both forward and backward sweep flag set. Please only set either one "
+        "or none for a continuous sweep");
+  }
+  if ((flags & LinearSweep) && (flags & LogSweep)) {
+    throw rte(
+        "Both logsweep and linear sweep flag set. Please only set either one.");
+  }
+  if (!((flags & LinearSweep) || (flags & LogSweep))) {
+    throw rte("Either LinearSweep or LogSweep should be given as flag");
+  }
+}
 
 void Sweep::resetImpl() {
 
@@ -133,7 +136,7 @@ void Sweep::resetImpl() {
       d phih = 2 * number_pi * Dt * (fl * Nf + 0.5 * (Nf - 1) * (fu - fl));
 
       us K =
-        (us)(phih / (2 * number_pi) + Dt * (fu * Nb - (Nb - 1) * (fu - fl)));
+          (us)(phih / (2 * number_pi) + Dt * (fu * Nb - (Nb - 1) * (fu - fl)));
 
       d eps_num1 = (K - phih / (2 * number_pi)) / Dt;
       d eps_num2 = -fu * Nb + (Nb - 1) * (fu - fl);
@@ -198,9 +201,9 @@ void Sweep::resetImpl() {
       const us Nb = N - Nf;
       const d k1 = (fu / fl);
       const d phif1 =
-        2 * number_pi * Dt * fl * (k1 - 1) / (d_pow(k1, 1.0 / Nf) - 1);
+          2 * number_pi * Dt * fl * (k1 - 1) / (d_pow(k1, 1.0 / Nf) - 1);
       const us K = (us)(phif1 / (2 * number_pi) +
-          Dt * fu * (1 / k1 - 1) / (d_pow(1 / k1, 1.0 / Nb) - 1));
+                        Dt * fu * (1 / k1 - 1) / (d_pow(1 / k1, 1.0 / Nb) - 1));
 
       d E;
       d k = k1;
@@ -209,7 +212,7 @@ void Sweep::resetImpl() {
        * continuous */
       for (us iter = 0; iter < NITER_NEWTON; iter++) {
         E = (k - 1) / (d_pow(k, 1.0 / Nf) - 1) +
-          (k - 1) / (1 - d_pow(k, -1.0 / Nb)) - K / Dt / fl;
+            (k - 1) / (1 - d_pow(k, -1.0 / Nb)) - K / Dt / fl;
         DEBUGTRACE_PRINT(E);
 
         /* All parts of the derivative of above error E to k */
@@ -217,14 +220,13 @@ void Sweep::resetImpl() {
         d dEdk2 = (1 / k - 1) / (d_pow(k, -1.0 / Nb) - 1);
         d dEdk3 = -1 / (k * (d_pow(k, -1.0 / Nb) - 1));
         d dEdk4 = d_pow(k, -1.0 / Nb) * (1 / k - 1) /
-          (Nb * d_pow(d_pow(k, -1.0 / Nb) - 1, 2));
+                  (Nb * d_pow(d_pow(k, -1.0 / Nb) - 1, 2));
         d dEdk5 = -d_pow(k, 1.0 / Nf) * (k - 1) /
-          (Nf * k * d_pow(d_pow(k, 1.0 / Nf) - 1, 2));
+                  (Nf * k * d_pow(d_pow(k, 1.0 / Nf) - 1, 2));
         d dEdk = dEdk1 + dEdk2 + dEdk3 + dEdk4 + dEdk5;
 
         /* Iterate! */
         k -= E / dEdk;
-
       }
 
       DEBUGTRACE_PRINT(K);
@@ -254,5 +256,10 @@ void Sweep::resetImpl() {
       /* This should be a very small number!! */
       DEBUGTRACE_PRINT(phase);
     }
+  } // End of log sweep
+  else {
+    // Either log or linear sweep had to be given as flags.
+    assert(false);
+
   }
 }

src/lasp/dsp/lasp_siggen_impl.h

@@ -64,6 +64,12 @@ class Periodic: public Siggen {
     vd _signal { 1, arma::fill::zeros};
     us _cur_pos = 0;
   public:
+    /**
+     * @brief Return copy of the generated sequence.
+     *
+     * @return As stated above
+     */
+    vd getSequence() const { return _signal; }
 
     virtual vd genSignalUnscaled(const us nframes) override final;
     ~Periodic() = default;

src/lasp/pybind11/lasp_siggen.cpp

@@ -1,10 +1,6 @@
-#include "lasp_avpowerspectra.h"
-#include "lasp_biquadbank.h"
-#include "lasp_fft.h"
 #include "lasp_siggen.h"
+#include "arma_npy.h"
 #include "lasp_siggen_impl.h"
-#include "lasp_slm.h"
-#include "lasp_window.h"
 #include <iostream>
 #include <pybind11/pybind11.h>
 
@@ -24,25 +20,30 @@ namespace py = pybind11;
  */
 void init_siggen(py::module &m) {
 
-  /// Siggen 
+  /// Siggen
   py::class_<Siggen, std::shared_ptr<Siggen>> siggen(m, "Siggen");
   siggen.def("setLevel", &Siggen::setLevel,
              "Set the level of the signal generator");
   siggen.def("setDCOffset", &Siggen::setDCOffset);
   siggen.def("setMute", &Siggen::setMute);
   siggen.def("setLevel", &Siggen::setLevel);
-  siggen.def("setLevel", &Siggen::setLevel, py::arg("newLevel"), py::arg("dB") = true);
+  siggen.def("setLevel", &Siggen::setLevel, py::arg("newLevel"),
+             py::arg("dB") = true);
+  siggen.def("reset", &Siggen::reset);
 
   siggen.def("setFilter", &Siggen::setFilter);
 
-  py::class_<Noise,std::shared_ptr<Noise>> noise(m, "Noise", siggen);
+  py::class_<Noise, std::shared_ptr<Noise>> noise(m, "Noise", siggen);
   noise.def(py::init<>());
 
   py::class_<Sine, std::shared_ptr<Sine>> sine(m, "Sine", siggen);
   sine.def(py::init<const d>());
   sine.def("setFreq", &Sine::setFreq);
 
-  py::class_<Periodic, std::shared_ptr<Periodic>> periodic(m, "Periodic", siggen);
+  py::class_<Periodic, std::shared_ptr<Periodic>> periodic(m, "Periodic",
+                                                           siggen);
+  periodic.def("getSequence",
+               [](const Sweep &s) { return ColToNpy<d>(s.getSequence()); });
 
   py::class_<Sweep, std::shared_ptr<Sweep>> sweep(m, "Sweep", periodic);
   sweep.def(py::init<const d, const d, const d, const d, const us>());
@@ -50,6 +51,5 @@ void init_siggen(py::module &m) {
   sweep.def_readonly_static("BackwardSweep", &Sweep::BackwardSweep);
   sweep.def_readonly_static("LinearSweep", &Sweep::LinearSweep);
   sweep.def_readonly_static("LogSweep", &Sweep::LogSweep);
-
 }
 /** @} */