Mercurial > hg > svcore
view base/RealTime.h @ 52:d397ea0a79f5
* Update licensing rubric for GPL
author | Chris Cannam |
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date | Mon, 20 Mar 2006 15:10:07 +0000 |
parents | 39ae3dee27b9 |
children | 7afcfe666910 |
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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */ /* Sonic Visualiser An audio file viewer and annotation editor. Centre for Digital Music, Queen Mary, University of London. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. See the file COPYING included with this distribution for more information. */ /* This is a modified version of a source file from the Rosegarden MIDI and audio sequencer and notation editor. This file copyright 2000-2006 Chris Cannam. */ #ifndef _REAL_TIME_H_ #define _REAL_TIME_H_ #include <iostream> #include <string> struct timeval; /** * RealTime represents time values to nanosecond precision * with accurate arithmetic and frame-rate conversion functions. */ struct RealTime { int sec; int nsec; int usec() const { return nsec / 1000; } int msec() const { return nsec / 1000000; } RealTime(): sec(0), nsec(0) {} RealTime(int s, int n); RealTime(const RealTime &r) : sec(r.sec), nsec(r.nsec) { } static RealTime fromSeconds(double sec); static RealTime fromMilliseconds(int msec); static RealTime fromTimeval(const struct timeval &); RealTime &operator=(const RealTime &r) { sec = r.sec; nsec = r.nsec; return *this; } RealTime operator+(const RealTime &r) const { return RealTime(sec + r.sec, nsec + r.nsec); } RealTime operator-(const RealTime &r) const { return RealTime(sec - r.sec, nsec - r.nsec); } RealTime operator-() const { return RealTime(-sec, -nsec); } bool operator <(const RealTime &r) const { if (sec == r.sec) return nsec < r.nsec; else return sec < r.sec; } bool operator >(const RealTime &r) const { if (sec == r.sec) return nsec > r.nsec; else return sec > r.sec; } bool operator==(const RealTime &r) const { return (sec == r.sec && nsec == r.nsec); } bool operator!=(const RealTime &r) const { return !(r == *this); } bool operator>=(const RealTime &r) const { if (sec == r.sec) return nsec >= r.nsec; else return sec >= r.sec; } bool operator<=(const RealTime &r) const { if (sec == r.sec) return nsec <= r.nsec; else return sec <= r.sec; } RealTime operator/(int d) const; // Find the fractional difference between times // double operator/(const RealTime &r) const; // Return a human-readable debug-type string to full precision // (probably not a format to show to a user directly) // std::string toString() const; // Return a user-readable string to the nearest millisecond // in a form like HH:MM:SS.mmm // std::string toText(bool fixedDp = false) const; // Convenience functions for handling sample frames // static long realTime2Frame(const RealTime &r, unsigned int sampleRate); static RealTime frame2RealTime(long frame, unsigned int sampleRate); static const RealTime zeroTime; }; std::ostream &operator<<(std::ostream &out, const RealTime &rt); #endif