Mercurial > hg > svcore
view base/RealTime.h @ 1121:067b60ae4861
Remove unused dependency on Rubber Band
author | Chris Cannam |
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date | Wed, 19 Aug 2015 16:36:21 +0100 |
parents | b8a788c9a6f1 |
children | c811991a5efa |
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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 SV_REAL_TIME_H #define SV_REAL_TIME_H #include "BaseTypes.h" #include <iostream> #include <string> #include <vamp-hostsdk/RealTime.h> 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) { } RealTime(const Vamp::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; Vamp::RealTime toVampRealTime() const { return Vamp::RealTime(sec, nsec); } 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, * typically in a form like HH:MM:SS.mmm. The exact format will * depend on the application preferences for time display * precision and hours:minutes:seconds format -- this function * simply dispatches to toMSText or toFrameText with appropriate * arguments depending on the preferences. * * If fixedDp is true, the result will be padded to 3 dp, * i.e. millisecond resolution, even if the number of milliseconds * is a multiple of 10. */ std::string toText(bool fixedDp = false) const; /** * Return a user-readable string to the nearest millisecond. * * If fixedDp is true, the result will be padded to 3 dp, * i.e. millisecond resolution, even if the number of milliseconds * is a multiple of 10. * * If hms is true, results may be returned in the form * HH:MM:SS.mmm (if the time is large enough). If hms is false, * the result will always be a (fractional) number of seconds. * * Unlike toText, this function does not depend on the application * preferences. */ std::string toMSText(bool fixedDp, bool hms) 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). * * Unlike toText, this function does not depend on the application * preferences. */ std::string toFrameText(int fps, bool hms) const; /** * Return a user-readable string to the nearest second, in H:M:S * form. Does not include milliseconds or frames. The result will * be suffixed "s" if it contains only seconds (no hours or * minutes). * * Unlike toText, this function does not depend on the application * preferences. */ 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, sv_samplerate_t sampleRate); /** * Convert a sample frame at the given sample rate into a RealTime. */ static RealTime frame2RealTime(sv_frame_t frame, sv_samplerate_t sampleRate); static const RealTime zeroTime; }; std::ostream &operator<<(std::ostream &out, const RealTime &rt); #endif