Merge remote-tracking branch 'sm0svx/master' into ToneEncoder

src/svxlink/trx/CMakeLists.txt

@@ -18,6 +18,7 @@ set(LIBSRC
   WbRxRtlSdr.cpp SigLevDet.cpp SigLevDetDdr.cpp
   SvxSwDtmfDecoder.cpp LocalRxSim.cpp SigLevDetSim.cpp
   AfskDtmfDecoder.cpp SigLevDetAfsk.cpp Modulation.cpp
+  ToneEncoder.cpp
 )
 include (CheckSymbolExists)
 CHECK_SYMBOL_EXISTS(HIDIOCGRAWINFO linux/hidraw.h HAS_HIDRAW_SUPPORT)

src/svxlink/trx/ToneEncoder.cpp

@@ -0,0 +1,186 @@
+/**
+@file	 ToneEncoder.cpp
+@brief   A tone encoder that can be used SvxLink wide
+@author  Tobias Blomberg / SM0SVX & Adi Bier / DL1HRC
+@date	 2019-04-08
+
+\verbatim
+SvxLink - A Multi Purpose Voice Services System for Ham Radio Use
+Copyright (C) 2004-2019  Tobias Blomberg / SM0SVX
+
+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; either version 2 of the License, or
+(at your option) any later version.
+
+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 General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+\endverbatim
+*/
+
+
+
+
+/****************************************************************************
+ *
+ * System Includes
+ *
+ ****************************************************************************/
+
+#include <cmath>
+
+
+/****************************************************************************
+ *
+ * Project Includes
+ *
+ ****************************************************************************/
+
+
+
+/****************************************************************************
+ *
+ * Local Includes
+ *
+ ****************************************************************************/
+
+#include "ToneEncoder.h"
+
+
+
+/****************************************************************************
+ *
+ * Namespaces to use
+ *
+ ****************************************************************************/
+
+using namespace std;
+using namespace Async;
+
+
+
+/****************************************************************************
+ *
+ * Defines & typedefs
+ *
+ ****************************************************************************/
+
+
+
+/****************************************************************************
+ *
+ * Local class definitions
+ *
+ ****************************************************************************/
+
+
+
+/****************************************************************************
+ *
+ * Prototypes
+ *
+ ****************************************************************************/
+
+
+
+/****************************************************************************
+ *
+ * Exported Global Variables
+ *
+ ****************************************************************************/
+
+
+
+
+/****************************************************************************
+ *
+ * Local Global Variables
+ *
+ ****************************************************************************/
+
+
+
+/****************************************************************************
+ *
+ * Public member functions
+ *
+ ****************************************************************************/
+
+ToneEncoder::ToneEncoder(float tone_hz, int level)
+  : m_tone(tone_hz), m_level(level), is_enabled(false),
+    pos(0)
+{
+} /* ToneEncoder::ToneEncoder */
+
+
+ToneEncoder::~ToneEncoder(void)
+{
+  setEnable(false);
+} /* ToneEncoder::~ToneEncoder */
+
+
+void ToneEncoder::setEnable(bool enable)
+{
+  is_enabled = enable;
+  if (is_enabled && m_tone > 0)
+  {
+    pos = 0;
+    writeSamples();
+  }
+} /* ToneEncoder::setEnable */
+
+
+void ToneEncoder::setLevel(int level)
+{
+  m_level = level / 100.0;
+} /* ToneEncoder::setLevel */
+
+
+void ToneEncoder::setTone(float tone_hz)
+{
+  m_tone = tone_hz;
+} /* ToneEncoder::setTone */
+
+
+void ToneEncoder::resumeOutput(void)
+{
+  writeSamples();
+} /* ToneEncoder::resumeOutput */
+
+
+void ToneEncoder::allSamplesFlushed(void)
+{
+} /* ToneEncoder::allSamplesFlushed */
+
+
+
+/****************************************************************************
+ *
+ * Private member functions
+ *
+ ****************************************************************************/
+
+void ToneEncoder::writeSamples(void)
+{
+  static const int BLOCK_SIZE = 128;
+  int written;
+  do {
+	float buf[BLOCK_SIZE];
+	for (int i=0; i<BLOCK_SIZE; ++i)
+	{
+      buf[i] = m_level * sin(2 * M_PI * m_tone * (pos+i) / INTERNAL_SAMPLE_RATE);
+	}
+	written = sinkWriteSamples(buf, BLOCK_SIZE);
+    pos += written;
+  } while (written != 0 && is_enabled);
+}
+    
+/*
+ * This file has not been truncated
+ */

src/svxlink/trx/ToneEncoder.h

@@ -0,0 +1,165 @@
+/**
+@file	 ToneEncoder.h
+@brief   A tone encoder that can be used SvxLink wide
+@author  Tobias Blomberg / SM0SVX & Adi Bier / DL1HRC
+@date	 2019-04-08
+
+\verbatim
+SvxLink - A Multi Purpose Voice Services System for Ham Radio Use
+Copyright (C) 2004-2019  Tobias Blomberg / SM0SVX
+
+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; either version 2 of the License, or
+(at your option) any later version.
+
+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 General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+\endverbatim
+*/
+
+
+#ifndef TONE_ENCODER_INCLUDED
+#define TONE_ENCODER_INCLUDED
+
+
+/****************************************************************************
+ *
+ * System Includes
+ *
+ ****************************************************************************/
+
+
+
+/****************************************************************************
+ *
+ * Project Includes
+ *
+ ****************************************************************************/
+
+#include <AsyncAudioSource.h>
+
+
+/****************************************************************************
+ *
+ * Local Includes
+ *
+ ****************************************************************************/
+
+
+
+/****************************************************************************
+ *
+ * Forward declarations
+ *
+ ****************************************************************************/
+
+
+
+/****************************************************************************
+ *
+ * Namespace
+ *
+ ****************************************************************************/
+
+//namespace MyNameSpace
+//{
+
+/****************************************************************************
+ *
+ * Defines & typedefs
+ *
+ ****************************************************************************/
+
+
+
+/****************************************************************************
+ *
+ * Exported Global Variables
+ *
+ ****************************************************************************/
+
+
+
+/****************************************************************************
+ *
+ * Class definitions
+ *
+ ****************************************************************************/
+
+/**
+@brief	A tone encoder that can be used SvxLink wide
+@author Tobias Blomberg / SM0SVX & Adi Bier / DL1HRC
+@date   2019-04-08
+*/
+
+class ToneEncoder : public Async::AudioSource
+{
+  public:
+    /**
+     * @brief Constructor
+     * @param tone_hz The frequency in Hz of the tone that should be detected
+     * @param level The audio level (0-100%)
+     */
+    ToneEncoder(float tone_hz, int level);
+
+    /**
+     * @brief   Destructor
+     */
+    ~ToneEncoder(void);
+
+    /**
+     * @brief  Return the detection frequency
+     * @param  tone_hz The tone frequency in Hertz
+     */
+    void setTone(float tone_hz);
+
+    /**
+     * @brief  Set the detection delay
+     * @param  level Set the audio level from 0-100%
+     */ 
+    void setLevel(int level);
+
+    /**
+     * @brief  Set the detection delay in processing blocks
+     * @param  enable Enable/disable the tone generator
+     */
+    void setEnable(bool enabled);
+    
+    void allSamplesFlushed(void);
+    
+    void resumeOutput(void);
+    
+    
+  private:
+ 
+    float               m_tone;
+    float               m_level;
+    bool                is_enabled;
+    int                 pos;
+  
+    /**
+     * @brief Write samples into the audio source
+     */
+    virtual void writeSamples(void);
+
+  
+};  /* class ToneEncoder */
+
+
+//} /* namespace */
+
+#endif /* TONE_ENCODER_INCLUDED */
+
+
+
+/*
+ * This file has not been truncated
+ */
+