git clone git://git.osmocom.org/sdrangelove.git

2026-06-03 06:24:48 -04:00 · 2014-05-18 16:52:39 +01:00
commit 7d3bfb26fc
203 changed files with 27958 additions and 0 deletions
@@ -0,0 +1,73 @@
+///////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
+// written by Christian Daniel                                                   //
+//                                                                               //
+// This program 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 as version 3 of the License, or                  //
+//                                                                               //
+// 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 General Public License V3 for more details.                               //
+//                                                                               //
+// You should have received a copy of the GNU General Public License             //
+// along with this program. If not, see <http://www.gnu.org/licenses/>.          //
+///////////////////////////////////////////////////////////////////////////////////
+
+#include "dsp/fftwindow.h"
+
+void FFTWindow::create(Function function, int n)
+{
+	Real (*wFunc)(Real n, Real i);
+
+	m_window.clear();
+
+	switch(function) {
+		case Flattop:
+			wFunc = flatTop;
+			break;
+
+		case Bartlett:
+			wFunc = bartlett;
+			break;
+
+		case BlackmanHarris:
+			wFunc = blackmanHarris;
+			break;
+
+		case Hamming:
+			wFunc = hamming;
+			break;
+
+		case Hanning:
+			wFunc = hanning;
+			break;
+
+		case Rectangle:
+		default:
+			wFunc = rectangle;
+			break;
+	}
+
+	for(int i = 0; i < n; i++)
+		m_window.push_back(wFunc(n, i));
+}
+
+void FFTWindow::apply(const std::vector<Real>& in, std::vector<Real>* out)
+{
+	for(size_t i = 0; i < m_window.size(); i++)
+		(*out)[i] = in[i] * m_window[i];
+}
+
+void FFTWindow::apply(const std::vector<Complex>& in, std::vector<Complex>* out)
+{
+	for(size_t i = 0; i < m_window.size(); i++)
+		(*out)[i] = in[i] * m_window[i];
+}
+
+void FFTWindow::apply(const Complex* in, Complex* out)
+{
+	for(size_t i = 0; i < m_window.size(); i++)
+		out[i] = in[i] * m_window[i];
+}