Mercurial > hg > svcore
view base/RealTime.cpp @ 339:ba30f4a3e3be
* Some work on correct alignment when moving panes during playback
* Overhaul alignment for playback frame values (view manager now always
refers to reference-timeline values, only the play source deals in
playback model timeline values)
* When making a selection, ensure the selection regions shown in other
panes (and used for playback constraints if appropriate) are aligned
correctly. This may be the coolest feature ever implemented in any
program ever.
author | Chris Cannam |
---|---|
date | Thu, 22 Nov 2007 14:17:19 +0000 |
parents | 21b9b25bff48 |
children | d7c41483af8f 94fc0591ea43 |
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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. */ #include <iostream> #if (__GNUC__ < 3) #include <strstream> #define stringstream strstream #else #include <sstream> #endif using std::cerr; using std::endl; #include "RealTime.h" #include "sys/time.h" // A RealTime consists of two ints that must be at least 32 bits each. // A signed 32-bit int can store values exceeding +/- 2 billion. This // means we can safely use our lower int for nanoseconds, as there are // 1 billion nanoseconds in a second and we need to handle double that // because of the implementations of addition etc that we use. // // The maximum valid RealTime on a 32-bit system is somewhere around // 68 years: 999999999 nanoseconds longer than the classic Unix epoch. #define ONE_BILLION 1000000000 RealTime::RealTime(int s, int n) : sec(s), nsec(n) { if (sec == 0) { while (nsec <= -ONE_BILLION) { nsec += ONE_BILLION; --sec; } while (nsec >= ONE_BILLION) { nsec -= ONE_BILLION; ++sec; } } else if (sec < 0) { while (nsec <= -ONE_BILLION) { nsec += ONE_BILLION; --sec; } while (nsec > 0) { nsec -= ONE_BILLION; ++sec; } } else { while (nsec >= ONE_BILLION) { nsec -= ONE_BILLION; ++sec; } while (nsec < 0) { nsec += ONE_BILLION; --sec; } } } RealTime RealTime::fromSeconds(double sec) { return RealTime(int(sec), int((sec - int(sec)) * ONE_BILLION + 0.5)); } RealTime RealTime::fromMilliseconds(int msec) { return RealTime(msec / 1000, (msec % 1000) * 1000000); } RealTime RealTime::fromTimeval(const struct timeval &tv) { return RealTime(tv.tv_sec, tv.tv_usec * 1000); } std::ostream &operator<<(std::ostream &out, const RealTime &rt) { if (rt < RealTime::zeroTime) { out << "-"; } else { out << " "; } int s = (rt.sec < 0 ? -rt.sec : rt.sec); int n = (rt.nsec < 0 ? -rt.nsec : rt.nsec); out << s << "."; int nn(n); if (nn == 0) out << "00000000"; else while (nn < (ONE_BILLION / 10)) { out << "0"; nn *= 10; } out << n << "R"; return out; } std::string RealTime::toString(bool align) const { std::stringstream out; out << *this; #if (__GNUC__ < 3) out << std::ends; #endif std::string s = out.str(); if (!align && *this >= RealTime::zeroTime) { // remove leading " " s = s.substr(1, s.length() - 1); } // remove trailing R return s.substr(0, s.length() - 1); } std::string RealTime::toText(bool fixedDp) const { if (*this < RealTime::zeroTime) return "-" + (-*this).toText(fixedDp); std::stringstream out; if (sec >= 3600) { out << (sec / 3600) << ":"; } if (sec >= 60) { out << (sec % 3600) / 60 << ":"; } if (sec >= 10) { out << ((sec % 60) / 10); } out << (sec % 10); int ms = msec(); if (ms != 0) { out << "."; out << (ms / 100); ms = ms % 100; if (ms != 0) { out << (ms / 10); ms = ms % 10; } else if (fixedDp) { out << "0"; } if (ms != 0) { out << ms; } else if (fixedDp) { out << "0"; } } else if (fixedDp) { out << ".000"; } #if (__GNUC__ < 3) out << std::ends; #endif std::string s = out.str(); return s; } std::string RealTime::toSecText() const { if (*this < RealTime::zeroTime) return "-" + (-*this).toSecText(); std::stringstream out; if (sec >= 3600) { out << (sec / 3600) << ":"; } if (sec >= 60) { out << (sec % 3600) / 60 << ":"; } if (sec >= 10) { out << ((sec % 60) / 10); } out << (sec % 10); if (sec < 60) { out << "s"; } #if (__GNUC__ < 3) out << std::ends; #endif std::string s = out.str(); return s; } RealTime RealTime::operator*(int m) const { double t = (double(nsec) / ONE_BILLION) * m; t += sec * m; return fromSeconds(t); } RealTime RealTime::operator/(int d) const { int secdiv = sec / d; int secrem = sec % d; double nsecdiv = (double(nsec) + ONE_BILLION * double(secrem)) / d; return RealTime(secdiv, int(nsecdiv + 0.5)); } double RealTime::operator/(const RealTime &r) const { double lTotal = double(sec) * ONE_BILLION + double(nsec); double rTotal = double(r.sec) * ONE_BILLION + double(r.nsec); if (rTotal == 0) return 0.0; else return lTotal/rTotal; } long RealTime::realTime2Frame(const RealTime &time, unsigned int sampleRate) { if (time < zeroTime) return -realTime2Frame(-time, sampleRate); // We like integers. The last term is always zero unless the // sample rate is greater than 1MHz, but hell, you never know... long frame = time.sec * sampleRate + (time.msec() * sampleRate) / 1000 + ((time.usec() - 1000 * time.msec()) * sampleRate) / 1000000 + ((time.nsec - 1000 * time.usec()) * sampleRate) / 1000000000; return frame; } RealTime RealTime::frame2RealTime(long frame, unsigned int sampleRate) { if (frame < 0) return -frame2RealTime(-frame, sampleRate); RealTime rt; rt.sec = frame / long(sampleRate); frame -= rt.sec * long(sampleRate); rt.nsec = (int)(((float(frame) * 1000000) / long(sampleRate)) * 1000); return rt; } const RealTime RealTime::zeroTime(0,0);