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MP7Time.hpp

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 /***********************************************************************
 *                                                                      *
 * ViTooKi Video Annotation Tool                                        *
 *                                                                      *
 * title: MP7Time.hpp                                                   *
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 * $Id: MP7Time.hpp,v 1.4 2005/01/14 12:01:19 mkropfbe Exp $
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#ifndef _MP7TIME_HPP_
#define _MP7TIME_HPP_

#include <global.hpp>

#define MP7TIME_DATE_LEN      15

#define MP7TIME_TZ_LEN        7

class MP7Time
{
public:
  MP7Time();

  bool setTimePoint(uint value, uint ticksPerSecond = 1);

  bool setTimePoint(const char *mp7Value);

  bool setTimePoint(const MP7Time &otherTime);

  bool moveTimePoint(int value, uint ticksPerSecond);
  
  bool setDuration(uint value, uint ticks);

  bool setDuration(const char *mp7Value);

  bool setDuration(const MP7Time &duration);

  bool setDurationFromEnd(const MP7Time &end);

  bool addDuration(const MP7Time &otherTime);

  const char *timePointPretty(bool forceSubSec = false) const;

  const char *durationPretty() const;

  MP7Time endTimePoint() const;

  const char * endTimePointPretty(bool forceSubSec = false) const;

  const char *toString() const;

  const char *timePointMP7() const;

  const char *durationMP7() const;

  double timeToSec() const;

  int timeToMSec() const;

  int durationToMSec() const;

  double durationToSec() const;

  bool timePointIsValid() const;

  bool durationIsNull() const;

  int compareTimePoint(const MP7Time &other) const;

  bool contains(const MP7Time &time) const;

private:
  void reset();

  void resetTimePoint();

  void resetDuration();

  struct timepoint {
    char date[MP7TIME_DATE_LEN+1]; // date part, in MPEG-7 format, sign included
    bool hasTime;                  // false if both sec and num fields are invalid
    uint sec;                      // time in seconds
    uint num;                      // numerator of second fraction
    uint denom;                    // denominator of second fraction
    char tz[MP7TIME_TZ_LEN+1];     // time zone
  } tpoint;

  struct duration {
    int sign;                   // +1 or -1
    uint days;
    uint sec;                   // seconds
    uint num;                   // numerator of second fraction
    uint denom;                 // denominator of second fraction
    char tz[MP7TIME_TZ_LEN+1];  // time zone
    int units;                  // number of time units (for IncrDuration type)
  } duration;

  static uint commonMultiple(uint op1, uint op2);
};

#endif /* _MP7TIME_HPP_ */

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