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Source/src/QtDSP/qtdsp_signalMeter.cpp

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+/**
+* @file  qtdsp_signalMeter.cpp
+* @brief Signal Meter class for QtDSP
+* @author Hermann von Hasseln, DL3HVH
+* @version 0.1
+* @date 2012-09-19
+*/
+
+/*   
+ *   Copyright (C) 2007, 2008, Philip A Covington, N8VB
+ *
+ *	 adapted for QtDSP by (C) 2012 Hermann von Hasseln, DL3HVH
+ *
+ *   With Algorithms borrowed from DttSP
+ *   Copyright (C) 2004, 2005, 2006 by Frank Brickle, AB2KT and Bob McGwier, N4HY
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Library General Public License version 2 as
+ *   published by the Free Software Foundation
+ *
+ *   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 for more details
+ *
+ *   You should have received a copy of the GNU Library General Public
+ *   License along with this program; if not, write to the
+ *   Free Software Foundation, Inc.,
+ *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+#include "qtdsp_signalMeter.h"
+
+SignalMeter::SignalMeter(QObject *parent, int size)
+	: QObject(parent)
+	, set(Settings::instance())
+	, m_size(size)
+	, m_instValue(-80.0)
+	//, m_correction(59.0f)
+	, m_correction(-8.0f)
+{
+}
+
+SignalMeter::~SignalMeter() {
+}
+
+void SignalMeter::ProcessBlock(CPX &in, int bsize) {
+
+	Q_UNUSED(bsize)
+
+    float tmp = 0.0f;
+
+    for (int i = 0; i < m_size; i++)
+    	tmp += (in.at(i).re * in.at(i).re + in.at(i).im * in.at(i).im);
+
+    m_instValue = (float)(10.0f * log10(tmp + 1.5E-45));
+}
+
+float SignalMeter::getInstFValue() const {
+
+	return m_instValue + m_correction;
+}
+
+float SignalMeter::getCorrection() const {
+
+	return m_correction;
+}
+
+void SignalMeter::setCorrection(const float value) {
+
+	if (m_correction == value) return;
+	
+	m_correction = value;
+}