Mercurial > hg > svcore
view base/RealTime.cpp @ 299:576be0d0d218
* Merge transform directory from sv-match-alignment branch
(the previous comment included notes for this stuff, but I missed it
in the actual merge)
* Fix crash when a transform fails to create an output model and the
thread that created the transform then deletes its input model thinking
it's no longer needed, even though the transform run thread is still
using it -- fix is to wait() on the transform before returning the
null output model
author | Chris Cannam |
---|---|
date | Fri, 28 Sep 2007 16:15:06 +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);