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 /************************************************************************/
 /*                                                                      */
 /*                Centre for Speech Technology Research                 */
 /*                     University of Edinburgh, UK                      */
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#ifndef __EST_TTIMEINDEX_H__
#define __EST_TTIMEINDEX_H__

#include <iostream>

/** A time index for a container. The container defines how to get an
  * object and so on, this lets you find a point in the container not
  * far before the entry you want.
  * 
  * @author Richard Caley <rjc@cstr.ed.ac.uk>
  * @version $Id: EST_TTimeIndex.h,v 1.3 2004/09/29 08:24:17 robert Exp $
  */

template<class  CONTAINER>
struct EST_TTI_Entry
{
  float t;
  CONTAINER::Index i;
};

template<class CONTAINER>
class EST_TTimeIndex 
{
public:
  typedef CONTAINER::Index Index;
  typedef EST_TTI_Entry<CONTAINER> Entry;

protected:
  CONTAINER *p_container;
  EST_TVector<Entry> p_entries;
  float p_time_step;

  void initialise();

private:
  void just_before(float time, void *in) const;

public:
  EST_TTimeIndex();
  EST_TTimeIndex(CONTAINER &c, int bunch=10);

  void index(CONTAINER &c, int bunch=10);
  void just_before(float time, Index &in) const
    { just_before(time, &in); }
};

template<class CONTAINER>
extern int operator !=(const EST_TTI_Entry<CONTAINER> &e1, 
		       const EST_TTI_Entry<CONTAINER> &e2);

template<class CONTAINER>
extern ostream& operator <<(
			    ostream &s, 
			    const EST_TTI_Entry<CONTAINER> &e);
#endif