Seekable.h

//-*-C++-*-
/***************************************************************************
 *
 *   Copyright (C) 2002 by Willem van Straten
 *   Licensed under the Academic Free License version 2.1
 *
 ***************************************************************************/
 
// dspsr/Kernel/Classes/dsp/Seekable.h
 
#ifndef __Seekable_h
#define __Seekable_h
 
#include "dsp/Memory.h"
#include "dsp/Input.h"
 
namespace dsp {
 
 
  class Seekable : public Input 
  {
    
  public:
    
    Seekable (const char* name);
    
    virtual ~Seekable ();
    
    virtual bool eod() const;
    
    virtual void rewind ();
 
    virtual uint64_t get_current_sample() { return current_sample; }
 
    void set_output (BitSeries* data);
 
    void set_overlap_buffer (BitSeries*);
 
    void set_overlap_buffer_memory (Memory * memory);
 
  protected:
    
    virtual void set_eod(bool _eod){ end_of_data = _eod; }
 
    virtual void load_data (BitSeries* data);
 
    virtual int64_t load_bytes (unsigned char* buffer, uint64_t bytes) = 0;
 
    virtual int64_t load_bytes_device (unsigned char* buffer, uint64_t bytes, void * dev_handle) = 0;
    
    virtual int64_t seek_bytes (uint64_t bytes) = 0;
    
    virtual uint64_t recycle_data (BitSeries* data);
 
    bool end_of_data;
    
    uint64_t current_sample;
 
    Reference::To<BitSeries> overlap_buffer;
 
    void init();
  };
 
}
 
#endif // !defined(__Seekable_h)