cannam@3: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
cannam@3: 
cannam@3: /*
cannam@3:     Vamp
cannam@3: 
cannam@3:     An API for audio analysis and feature extraction plugins.
cannam@3: 
cannam@3:     Centre for Digital Music, Queen Mary, University of London.
cannam@3:     Copyright 2006 Chris Cannam.
cannam@3:   
cannam@3:     Permission is hereby granted, free of charge, to any person
cannam@3:     obtaining a copy of this software and associated documentation
cannam@3:     files (the "Software"), to deal in the Software without
cannam@3:     restriction, including without limitation the rights to use, copy,
cannam@3:     modify, merge, publish, distribute, sublicense, and/or sell copies
cannam@3:     of the Software, and to permit persons to whom the Software is
cannam@3:     furnished to do so, subject to the following conditions:
cannam@3: 
cannam@3:     The above copyright notice and this permission notice shall be
cannam@3:     included in all copies or substantial portions of the Software.
cannam@3: 
cannam@3:     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
cannam@3:     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
cannam@3:     MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
cannam@6:     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
cannam@3:     ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
cannam@3:     CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
cannam@3:     WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
cannam@3: 
cannam@3:     Except as contained in this notice, the names of the Centre for
cannam@3:     Digital Music; Queen Mary, University of London; and Chris Cannam
cannam@3:     shall not be used in advertising or otherwise to promote the sale,
cannam@3:     use or other dealings in this Software without prior written
cannam@3:     authorization.
cannam@3: */
cannam@3: 
cannam@3: /*
cannam@3:    This is a modified version of a source file from the 
cannam@3:    Rosegarden MIDI and audio sequencer and notation editor.
cannam@10:    This file copyright 2000-2006 Chris Cannam.
cannam@10:    Relicensed by the author as detailed above.
cannam@3: */
cannam@3: 
cannam@3: #include <iostream>
cannam@3: 
cannam@3: #if (__GNUC__ < 3)
cannam@3: #include <strstream>
cannam@3: #define stringstream strstream
cannam@3: #else
cannam@3: #include <sstream>
cannam@3: #endif
cannam@3: 
cannam@3: using std::cerr;
cannam@3: using std::endl;
cannam@3: 
cannam@3: #include "RealTime.h"
cannam@3: #include "sys/time.h"
cannam@3: 
cannam@3: namespace Vamp {
cannam@3: 
cannam@3: // A RealTime consists of two ints that must be at least 32 bits each.
cannam@3: // A signed 32-bit int can store values exceeding +/- 2 billion.  This
cannam@3: // means we can safely use our lower int for nanoseconds, as there are
cannam@3: // 1 billion nanoseconds in a second and we need to handle double that
cannam@3: // because of the implementations of addition etc that we use.
cannam@3: //
cannam@3: // The maximum valid RealTime on a 32-bit system is somewhere around
cannam@3: // 68 years: 999999999 nanoseconds longer than the classic Unix epoch.
cannam@3: 
cannam@3: #define ONE_BILLION 1000000000
cannam@3: 
cannam@3: RealTime::RealTime(int s, int n) :
cannam@3:     sec(s), nsec(n)
cannam@3: {
cannam@3:     if (sec == 0) {
cannam@3: 	while (nsec <= -ONE_BILLION) { nsec += ONE_BILLION; --sec; }
cannam@3: 	while (nsec >=  ONE_BILLION) { nsec -= ONE_BILLION; ++sec; }
cannam@3:     } else if (sec < 0) {
cannam@3: 	while (nsec <= -ONE_BILLION) { nsec += ONE_BILLION; --sec; }
cannam@3: 	while (nsec > 0)             { nsec -= ONE_BILLION; ++sec; }
cannam@3:     } else { 
cannam@3: 	while (nsec >=  ONE_BILLION) { nsec -= ONE_BILLION; ++sec; }
cannam@3: 	while (nsec < 0)             { nsec += ONE_BILLION; --sec; }
cannam@3:     }
cannam@3: }
cannam@3: 
cannam@3: RealTime
cannam@3: RealTime::fromSeconds(double sec)
cannam@3: {
cannam@3:     return RealTime(int(sec), int((sec - int(sec)) * ONE_BILLION));
cannam@3: }
cannam@3: 
cannam@3: RealTime
cannam@3: RealTime::fromMilliseconds(int msec)
cannam@3: {
cannam@3:     return RealTime(msec / 1000, (msec % 1000) * 1000000);
cannam@3: }
cannam@3: 
cannam@3: RealTime
cannam@3: RealTime::fromTimeval(const struct timeval &tv)
cannam@3: {
cannam@3:     return RealTime(tv.tv_sec, tv.tv_usec * 1000);
cannam@3: }
cannam@3: 
cannam@3: std::ostream &operator<<(std::ostream &out, const RealTime &rt)
cannam@3: {
cannam@3:     if (rt < RealTime::zeroTime) {
cannam@3: 	out << "-";
cannam@3:     } else {
cannam@3: 	out << " ";
cannam@3:     }
cannam@3: 
cannam@3:     int s = (rt.sec < 0 ? -rt.sec : rt.sec);
cannam@3:     int n = (rt.nsec < 0 ? -rt.nsec : rt.nsec);
cannam@3: 
cannam@3:     out << s << ".";
cannam@3: 
cannam@3:     int nn(n);
cannam@3:     if (nn == 0) out << "00000000";
cannam@3:     else while (nn < (ONE_BILLION / 10)) {
cannam@3: 	out << "0";
cannam@3: 	nn *= 10;
cannam@3:     }
cannam@3:     
cannam@3:     out << n << "R";
cannam@3:     return out;
cannam@3: }
cannam@3: 
cannam@3: std::string
cannam@3: RealTime::toString() const
cannam@3: {
cannam@3:     std::stringstream out;
cannam@3:     out << *this;
cannam@3:     
cannam@3: #if (__GNUC__ < 3)
cannam@3:     out << std::ends;
cannam@3: #endif
cannam@3: 
cannam@3:     std::string s = out.str();
cannam@3: 
cannam@3:     // remove trailing R
cannam@3:     return s.substr(0, s.length() - 1);
cannam@3: }
cannam@3: 
cannam@3: std::string
cannam@3: RealTime::toText(bool fixedDp) const
cannam@3: {
cannam@3:     if (*this < RealTime::zeroTime) return "-" + (-*this).toText();
cannam@3: 
cannam@3:     std::stringstream out;
cannam@3: 
cannam@3:     if (sec >= 3600) {
cannam@3: 	out << (sec / 3600) << ":";
cannam@3:     }
cannam@3: 
cannam@3:     if (sec >= 60) {
cannam@3: 	out << (sec % 3600) / 60 << ":";
cannam@3:     }
cannam@3: 
cannam@3:     if (sec >= 10) {
cannam@3: 	out << ((sec % 60) / 10);
cannam@3:     }
cannam@3: 
cannam@3:     out << (sec % 10);
cannam@3:     
cannam@3:     int ms = msec();
cannam@3: 
cannam@3:     if (ms != 0) {
cannam@3: 	out << ".";
cannam@3: 	out << (ms / 100);
cannam@3: 	ms = ms % 100;
cannam@3: 	if (ms != 0) {
cannam@3: 	    out << (ms / 10);
cannam@3: 	    ms = ms % 10;
cannam@3: 	} else if (fixedDp) {
cannam@3: 	    out << "0";
cannam@3: 	}
cannam@3: 	if (ms != 0) {
cannam@3: 	    out << ms;
cannam@3: 	} else if (fixedDp) {
cannam@3: 	    out << "0";
cannam@3: 	}
cannam@3:     } else if (fixedDp) {
cannam@3: 	out << ".000";
cannam@3:     }
cannam@3: 	
cannam@3: #if (__GNUC__ < 3)
cannam@3:     out << std::ends;
cannam@3: #endif
cannam@3: 
cannam@3:     std::string s = out.str();
cannam@3: 
cannam@3:     return s;
cannam@3: }
cannam@3: 
cannam@3: 
cannam@3: RealTime
cannam@3: RealTime::operator/(int d) const
cannam@3: {
cannam@3:     int secdiv = sec / d;
cannam@3:     int secrem = sec % d;
cannam@3: 
cannam@3:     double nsecdiv = (double(nsec) + ONE_BILLION * double(secrem)) / d;
cannam@3:     
cannam@3:     return RealTime(secdiv, int(nsecdiv + 0.5));
cannam@3: }
cannam@3: 
cannam@3: double 
cannam@3: RealTime::operator/(const RealTime &r) const
cannam@3: {
cannam@3:     double lTotal = double(sec) * ONE_BILLION + double(nsec);
cannam@3:     double rTotal = double(r.sec) * ONE_BILLION + double(r.nsec);
cannam@3:     
cannam@3:     if (rTotal == 0) return 0.0;
cannam@3:     else return lTotal/rTotal;
cannam@3: }
cannam@3: 
cannam@3: long
cannam@3: RealTime::realTime2Frame(const RealTime &time, unsigned int sampleRate)
cannam@3: {
cannam@3:     if (time < zeroTime) return -realTime2Frame(-time, sampleRate);
cannam@3: 
cannam@3:     // We like integers.  The last term is always zero unless the
cannam@3:     // sample rate is greater than 1MHz, but hell, you never know...
cannam@3: 
cannam@3:     long frame =
cannam@3: 	time.sec * sampleRate +
cannam@3: 	(time.msec() * sampleRate) / 1000 +
cannam@3: 	((time.usec() - 1000 * time.msec()) * sampleRate) / 1000000 +
cannam@3: 	((time.nsec - 1000 * time.usec()) * sampleRate) / 1000000000;
cannam@3: 
cannam@3:     return frame;
cannam@3: }
cannam@3: 
cannam@3: RealTime
cannam@3: RealTime::frame2RealTime(long frame, unsigned int sampleRate)
cannam@3: {
cannam@3:     if (frame < 0) return -frame2RealTime(-frame, sampleRate);
cannam@3: 
cannam@3:     RealTime rt;
cannam@3:     rt.sec = frame / long(sampleRate);
cannam@3:     frame -= rt.sec * long(sampleRate);
cannam@3:     rt.nsec = (int)(((float(frame) * 1000000) / long(sampleRate)) * 1000);
cannam@3:     return rt;
cannam@3: }
cannam@3: 
cannam@3: const RealTime RealTime::zeroTime(0,0);
cannam@3: 
cannam@3: }