EQSymbolDecoder.h

//
// Copyright 2018, Jeremy Cooper
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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#ifndef EQSYMBOL_DECODER_H
#define EQSYMBOL_DECODER_H

class EQSymbolDecoder
{
protected:
  EQSymbolDecoder() {};
  ~EQSymbolDecoder() {};

public:
  //
  // Reset the decoder state.
  //
  virtual void Reset() = 0;
  
  //
  // Called by lower-level to indicate that carrier state has changed.
  //
  virtual void CarrierDetected(bool detected) = 0;
  
  //
  // Called by a lower-level clock detector when it thinks it
  // is time to sample a symbol.
  //
  virtual void ReceiveSample(float sample) = 0;

  //
  // Called by the lower-level to indicate that there is no more
  // input.
  //
  virtual void Stop() = 0;
};

#endif