1 files changed, 191 insertions, 0 deletions
diff --git a/gr-analog/lib/fastnoise_source_impl.cc b/gr-analog/lib/fastnoise_source_impl.cc
new file mode 100644
index 0000000000..9cdea4e50d
--- /dev/null
+++ b/gr-analog/lib/fastnoise_source_impl.cc
@@ -0,0 +1,191 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2013,2018 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ *
+ * GNU Radio 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "fastnoise_source_impl.h"
+#include <gnuradio/xoroshiro128p.h>
+#include <gnuradio/io_signature.h>
+#include <stdexcept>
+
+namespace gr {
+namespace analog {
+
+template <class T>
+typename fastnoise_source<T>::sptr
+fastnoise_source<T>::make(noise_type_t type, float ampl, long seed, long samples) {
+    return gnuradio::get_initial_sptr(new fastnoise_source_impl<T>(type, ampl, seed, samples));
+}
+
+  template <>
+  void fastnoise_source_impl<gr_complex>::generate() {
+    int noutput_items = d_samples.size();
+    switch (d_type) {
+    case GR_UNIFORM:
+      for (int i = 0; i < noutput_items; i++)
+        d_samples[i] = gr_complex(d_ampl * ((d_rng.ran1() * 2.0) - 1.0),
+                                  d_ampl * ((d_rng.ran1() * 2.0) - 1.0));
+      break;
+
+    case GR_GAUSSIAN:
+      for (int i = 0; i < noutput_items; i++)
+        d_samples[i] = d_ampl * d_rng.rayleigh_complex();
+      break;
+    default:
+      throw std::runtime_error("invalid type");
+    }
+  }
+
+template <class T>
+fastnoise_source_impl<T>::fastnoise_source_impl(noise_type_t type,
+                                                float ampl,
+                                                long seed,
+                                                long samples)
+    : sync_block(
+          "fastnoise_source", io_signature::make(0, 0, 0), io_signature::make(1, 1, sizeof(T))),
+      d_type(type), d_ampl(ampl) {
+    d_samples.resize(samples);
+    xoroshiro128p_seed(d_state, (uint64_t) seed);
+    generate();
+}
+
+
+template <>
+fastnoise_source_impl<gr_complex>::fastnoise_source_impl(noise_type_t type,
+                                                         float ampl,
+                                                         long seed,
+                                                         long samples)
+    : sync_block("fastnoise_source",
+                 io_signature::make(0, 0, 0),
+                 io_signature::make(1, 1, sizeof(gr_complex))),
+      d_type(type), d_ampl(ampl / sqrtf(2.0f)) {
+    d_samples.resize(samples);
+    xoroshiro128p_seed(d_state, (uint64_t) seed);
+    generate();
+}
+
+template <class T>
+fastnoise_source_impl<T>::~fastnoise_source_impl() {}
+
+template <class T>
+void fastnoise_source_impl<T>::set_type(noise_type_t type) {
+    gr::thread::scoped_lock l(this->d_setlock);
+    d_type = type;
+    generate();
+}
+
+template <class T>
+void fastnoise_source_impl<T>::set_amplitude(float ampl) {
+    gr::thread::scoped_lock l(this->d_setlock);
+    d_ampl = ampl;
+    generate();
+}
+
+template <>
+void fastnoise_source_impl<gr_complex>::set_amplitude(float ampl) {
+    gr::thread::scoped_lock l(this->d_setlock);
+    d_ampl = ampl / sqrtf(2.0f);
+    generate();
+}
+
+
+template <class T>
+void fastnoise_source_impl<T>::generate() {
+    int noutput_items = d_samples.size();
+    switch (d_type) {
+    case GR_UNIFORM:
+        for (int i = 0; i < noutput_items; i++)
+            d_samples[i] = (T)(d_ampl * ((d_rng.ran1() * 2.0) - 1.0));
+        break;
+
+    case GR_GAUSSIAN:
+        for (int i = 0; i < noutput_items; i++)
+            d_samples[i] = (T)(d_ampl * d_rng.gasdev());
+        break;
+
+    case GR_LAPLACIAN:
+        for (int i = 0; i < noutput_items; i++)
+            d_samples[i] = (T)(d_ampl * d_rng.laplacian());
+        break;
+
+    case GR_IMPULSE: // FIXME changeable impulse settings
+        for (int i = 0; i < noutput_items; i++)
+            d_samples[i] = (T)(d_ampl * d_rng.impulse(9));
+        break;
+    default:
+        throw std::runtime_error("invalid type");
+    }
+}
+
+
+
+template <class T>
+int fastnoise_source_impl<T>::work(int noutput_items,
+                                   gr_vector_const_void_star& input_items,
+                                   gr_vector_void_star& output_items) {
+    gr::thread::scoped_lock l(this->d_setlock);
+
+    T* out = (T*)output_items[0];
+
+    for (int i = 0; i < noutput_items; i++) {
+        out[i] = sample();
+    }
+
+    return noutput_items;
+}
+
+template <class T>
+T fastnoise_source_impl<T>::sample() {
+    size_t idx = xoroshiro128p_next(d_state) % d_samples.size();
+    return d_samples[idx];
+}
+
+template <class T>
+T fastnoise_source_impl<T>::sample_unbiased() {
+    uint64_t random_int = xoroshiro128p_next(d_state);
+    float s = sample();
+    return (random_int & (1<<23)) ? (-s) : s;
+}
+
+template <>
+gr_complex fastnoise_source_impl<gr_complex>::sample_unbiased() {
+    uint64_t random_int = xoroshiro128p_next(d_state);
+    float re = (random_int & (UINT64_C(1)<<23)) ? (- s.real()) : (s.real());
+    float im = (random_int & (UINT64_C(1)<<42)) ? (- s.real()) : (s.real());
+    return gr_complex(re, im);
+}
+
+template <class T>
+const std::vector<T>& fast_noise_source_impl<T>::samples() const {
+    return d_samples;
+}
+
+
+template class fastnoise_source<std::int16_t>;
+template class fastnoise_source<std::int32_t>;
+template class fastnoise_source<float>;
+template class fastnoise_source<gr_complex>;
+} /* namespace analog */
+} /* namespace gr */