cannam@3: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
cannam@3: 
cannam@3: /*
cannam@3:     Vamp
cannam@3: 
cannam@3:     An API for audio analysis and feature extraction plugins.
cannam@3: 
cannam@3:     Centre for Digital Music, Queen Mary, University of London.
cannam@3:     Copyright 2006 Chris Cannam.
cannam@3:   
cannam@3:     Permission is hereby granted, free of charge, to any person
cannam@3:     obtaining a copy of this software and associated documentation
cannam@3:     files (the "Software"), to deal in the Software without
cannam@3:     restriction, including without limitation the rights to use, copy,
cannam@3:     modify, merge, publish, distribute, sublicense, and/or sell copies
cannam@3:     of the Software, and to permit persons to whom the Software is
cannam@3:     furnished to do so, subject to the following conditions:
cannam@3: 
cannam@3:     The above copyright notice and this permission notice shall be
cannam@3:     included in all copies or substantial portions of the Software.
cannam@3: 
cannam@3:     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
cannam@3:     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
cannam@3:     MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
cannam@3:     NONINFRINGEMENT. IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR
cannam@3:     ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
cannam@3:     CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
cannam@3:     WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
cannam@3: 
cannam@3:     Except as contained in this notice, the names of the Centre for
cannam@3:     Digital Music; Queen Mary, University of London; and Chris Cannam
cannam@3:     shall not be used in advertising or otherwise to promote the sale,
cannam@3:     use or other dealings in this Software without prior written
cannam@3:     authorization.
cannam@3: */
cannam@3: 
cannam@3: /*
cannam@3:    This is a modified version of a source file from the 
cannam@3:    Rosegarden MIDI and audio sequencer and notation editor.
cannam@3:    This file copyright 2000-2006 Chris Cannam; relicensed as detailed above
cannam@3: */
cannam@3: 
cannam@5: #ifndef _VAMP_REAL_TIME_H_
cannam@5: #define _VAMP_REAL_TIME_H_
cannam@3: 
cannam@3: #include <iostream>
cannam@3: #include <string>
cannam@3: 
cannam@3: struct timeval;
cannam@3: 
cannam@3: namespace Vamp {
cannam@3: 
cannam@3: /**
cannam@3:  * RealTime represents time values to nanosecond precision
cannam@3:  * with accurate arithmetic and frame-rate conversion functions.
cannam@3:  */
cannam@3: 
cannam@3: struct RealTime
cannam@3: {
cannam@3:     int sec;
cannam@3:     int nsec;
cannam@3: 
cannam@3:     int usec() const { return nsec / 1000; }
cannam@3:     int msec() const { return nsec / 1000000; }
cannam@3: 
cannam@3:     RealTime(): sec(0), nsec(0) {}
cannam@3:     RealTime(int s, int n);
cannam@3: 
cannam@3:     RealTime(const RealTime &r) :
cannam@3: 	sec(r.sec), nsec(r.nsec) { }
cannam@3: 
cannam@3:     static RealTime fromSeconds(double sec);
cannam@3:     static RealTime fromMilliseconds(int msec);
cannam@3:     static RealTime fromTimeval(const struct timeval &);
cannam@3: 
cannam@3:     RealTime &operator=(const RealTime &r) {
cannam@3: 	sec = r.sec; nsec = r.nsec; return *this;
cannam@3:     }
cannam@3: 
cannam@3:     RealTime operator+(const RealTime &r) const {
cannam@3: 	return RealTime(sec + r.sec, nsec + r.nsec);
cannam@3:     }
cannam@3:     RealTime operator-(const RealTime &r) const {
cannam@3: 	return RealTime(sec - r.sec, nsec - r.nsec);
cannam@3:     }
cannam@3:     RealTime operator-() const {
cannam@3: 	return RealTime(-sec, -nsec);
cannam@3:     }
cannam@3: 
cannam@3:     bool operator <(const RealTime &r) const {
cannam@3: 	if (sec == r.sec) return nsec < r.nsec;
cannam@3: 	else return sec < r.sec;
cannam@3:     }
cannam@3: 
cannam@3:     bool operator >(const RealTime &r) const {
cannam@3: 	if (sec == r.sec) return nsec > r.nsec;
cannam@3: 	else return sec > r.sec;
cannam@3:     }
cannam@3: 
cannam@3:     bool operator==(const RealTime &r) const {
cannam@3:         return (sec == r.sec && nsec == r.nsec);
cannam@3:     }
cannam@3:  
cannam@3:     bool operator!=(const RealTime &r) const {
cannam@3:         return !(r == *this);
cannam@3:     }
cannam@3:  
cannam@3:     bool operator>=(const RealTime &r) const {
cannam@3:         if (sec == r.sec) return nsec >= r.nsec;
cannam@3:         else return sec >= r.sec;
cannam@3:     }
cannam@3: 
cannam@3:     bool operator<=(const RealTime &r) const {
cannam@3:         if (sec == r.sec) return nsec <= r.nsec;
cannam@3:         else return sec <= r.sec;
cannam@3:     }
cannam@3: 
cannam@3:     RealTime operator/(int d) const;
cannam@3: 
cannam@3:     // Find the fractional difference between times
cannam@3:     //
cannam@3:     double operator/(const RealTime &r) const;
cannam@3: 
cannam@3:     // Return a human-readable debug-type string to full precision
cannam@3:     // (probably not a format to show to a user directly)
cannam@3:     // 
cannam@3:     std::string toString() const;
cannam@3: 
cannam@3:     // Return a user-readable string to the nearest millisecond
cannam@3:     // in a form like HH:MM:SS.mmm
cannam@3:     //
cannam@3:     std::string toText(bool fixedDp = false) const;
cannam@3: 
cannam@3:     // Convenience functions for handling sample frames
cannam@3:     //
cannam@3:     static long realTime2Frame(const RealTime &r, unsigned int sampleRate);
cannam@3:     static RealTime frame2RealTime(long frame, unsigned int sampleRate);
cannam@3: 
cannam@3:     static const RealTime zeroTime;
cannam@3: };
cannam@3: 
cannam@3: std::ostream &operator<<(std::ostream &out, const RealTime &rt);
cannam@3: 
cannam@3: }
cannam@3:     
cannam@3: #endif