Restore the branch

FMControl.h

@@ -0,0 +1,55 @@
+/*
+ *   Copyright (C) 2020 by Jonathan Naylor G4KLX
+ *
+ *   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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#if !defined(FMControl_H)
+#define	FMControl_H
+
+#include "FMNetwork.h"
+#include "Defines.h"
+#include "IIRDirectForm1Filter.h"
+
+// Uncomment this to dump audio to a raw audio file
+// The file will be written in same folder as executable
+// Toplay the file : ffplay -autoexit -f u16be -ar 8000 audiodump.bin
+// #define DUMP_RF_AUDIO
+
+class CFMControl {
+public:
+	CFMControl(CFMNetwork* network);
+	~CFMControl();
+
+	bool writeModem(const unsigned char* data, unsigned int length);
+
+	unsigned int readModem(unsigned char* data, unsigned int space);
+
+	void clock(unsigned int ms);
+
+	void enable(bool enabled);
+
+private:
+	CFMNetwork* m_network;
+    bool        m_enabled;
+	CRingBuffer<unsigned char> m_incomingRFAudio;
+	CIIRDirectForm1Filter* m_preemphasis;
+	CIIRDirectForm1Filter* m_deemphasis;
+	CIIRDirectForm1Filter* m_filterStage1;
+	CIIRDirectForm1Filter* m_filterStage2;
+	CIIRDirectForm1Filter* m_filterStage3;
+};
+
+#endif