TimeValue.h

/*******************************************************************************
 * Copyright (c) 2024, 2026, Olivier Ayache.  All rights reserved.
 *
 * This file is part of AVPKit.
 *
 * AVPKit is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * AVPKit 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with AVPKit.  If not, see <http://www.gnu.org/licenses/>.
 *******************************************************************************/
 
/*
 * TimeValue.h
 *
 *  Created on: Sep 19, 2008
 *      Author: aclarke
 */
 
#ifndef TIMEVALUE_H_
#define TIMEVALUE_H_
 
#include <climits>
#include <com/avpkit/core/ITimeValue.h>
 
namespace com { namespace avpkit { namespace core {
 
class TimeValue: public ITimeValue
{
  VS_JNIUTILS_REFCOUNTED_OBJECT_PRIVATE_MAKE(TimeValue);
public:
  virtual int64_t get(Unit unit);
  virtual int32_t compareTo(ITimeValue* other);
 
  Unit getNativeUnit();
 
  static TimeValue* make(int64_t value, Unit unit);
  static TimeValue* make(TimeValue *src);
  static inline int32_t compare(int64_t thisValue, int64_t thatValue)
  {
    int64_t retval;
    int64_t adjustment = 1;
    const static int64_t sMaxDistance = LLONG_MAX/2;
    if ((thisValue > sMaxDistance && thatValue <= -sMaxDistance) ||
        (thatValue > sMaxDistance && thisValue <= -sMaxDistance))
      // in these  cases we assume the time value has looped over
      // a int64_t value, and we really want to invert the diff.
      adjustment = -1;
 
    if (thisValue < thatValue)
      retval = -adjustment;
    else if (thisValue > thatValue)
      retval = adjustment;
    else
      retval = 0;
    return retval;
  }
 
protected:
  TimeValue();
  virtual ~TimeValue();
private:
  void set(int64_t value, Unit unit);
  int64_t mValue;
  Unit mUnit;
};
 
}}}
 
#endif /* TIMEVALUE_H_ */