Mercurial > hg > svcore
view base/RealTime.h @ 1038:cc27f35aa75c cxx11
Introducing the signed 64-bit frame index type, and fixing build failures from inclusion of -Wconversion with -Werror. Not finished yet.
author | Chris Cannam |
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date | Tue, 03 Mar 2015 15:18:24 +0000 |
parents | 75f154085a4d |
children | a1cd5abcb38b |
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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 "BaseTypes.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 &); static RealTime fromXsdDuration(std::string xsdd); double toDouble() const; 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 m) const; RealTime operator/(int d) const; RealTime operator*(double m) const; RealTime operator/(double d) const; /** * Return the ratio of two 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). If align * is true, prepend " " to the start of positive values so that * they line up with negative ones (which start with "-"). */ std::string toString(bool align = false) const; /** * Convert a string as obtained from toString back to a RealTime * object. */ static RealTime fromString(std::string); /** * Return a user-readable string to the nearest millisecond, in a * form like HH:MM:SS.mmm */ std::string toText(bool fixedDp = false) const; /** * Return a user-readable string in which seconds are divided into * frames (presumably at a lower frame rate than audio rate, * e.g. 24 or 25 video frames), in a form like HH:MM:SS:FF. fps * gives the number of frames per second, and must be integral * (29.97 not supported). */ std::string toFrameText(int fps) const; /** * Return a user-readable string to the nearest second, in a form * like "6s" (for less than a minute) or "2:21" (for more). */ std::string toSecText() const; /** * Return a string in xsd:duration format. */ std::string toXsdDuration() const; /** * Convert a RealTime into a sample frame at the given sample rate. */ static sv_frame_t realTime2Frame(const RealTime &r, int sampleRate); /** * Convert a sample frame at the given sample rate into a RealTime. */ static RealTime frame2RealTime(sv_frame_t frame, int sampleRate); static const RealTime zeroTime; }; std::ostream &operator<<(std::ostream &out, const RealTime &rt); #endif