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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
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An API for audio analysis and feature extraction plugins.
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Centre for Digital Music, Queen Mary, University of London.
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Copyright 2006 Chris Cannam.
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Permission is hereby granted, free of charge, to any person
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obtaining a copy of this software and associated documentation
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files (the "Software"), to deal in the Software without
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restriction, including without limitation the rights to use, copy,
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modify, merge, publish, distribute, sublicense, and/or sell copies
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of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
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ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
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CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the names of the Centre for
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Digital Music; Queen Mary, University of London; and Chris Cannam
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shall not be used in advertising or otherwise to promote the sale,
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use or other dealings in this Software without prior written
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This is a modified version of a source file from the
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Rosegarden MIDI and audio sequencer and notation editor.
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This file copyright 2000-2006 Chris Cannam.
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Relicensed by the author as detailed above.
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#ifndef _VAMP_REAL_TIME_H_
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#define _VAMP_REAL_TIME_H_
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#include "plugguard.h"
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_VAMP_SDK_PLUGSPACE_BEGIN(RealTime.h)
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* \class RealTime RealTime.h <vamp-sdk/RealTime.h>
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* RealTime represents time values to nanosecond precision
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* with accurate arithmetic and frame-rate conversion functions.
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int usec() const { return nsec / 1000; }
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int msec() const { return nsec / 1000000; }
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RealTime(): sec(0), nsec(0) {}
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RealTime(int s, int n);
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RealTime(const RealTime &r) :
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sec(r.sec), nsec(r.nsec) { }
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static RealTime fromSeconds(double sec);
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static RealTime fromMilliseconds(int msec);
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static RealTime fromTimeval(const struct timeval &);
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RealTime &operator=(const RealTime &r) {
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sec = r.sec; nsec = r.nsec; return *this;
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RealTime operator+(const RealTime &r) const {
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return RealTime(sec + r.sec, nsec + r.nsec);
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RealTime operator-(const RealTime &r) const {
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return RealTime(sec - r.sec, nsec - r.nsec);
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RealTime operator-() const {
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return RealTime(-sec, -nsec);
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bool operator <(const RealTime &r) const {
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if (sec == r.sec) return nsec < r.nsec;
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else return sec < r.sec;
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bool operator >(const RealTime &r) const {
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if (sec == r.sec) return nsec > r.nsec;
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else return sec > r.sec;
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bool operator==(const RealTime &r) const {
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return (sec == r.sec && nsec == r.nsec);
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bool operator!=(const RealTime &r) const {
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return !(r == *this);
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bool operator>=(const RealTime &r) const {
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if (sec == r.sec) return nsec >= r.nsec;
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else return sec >= r.sec;
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bool operator<=(const RealTime &r) const {
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if (sec == r.sec) return nsec <= r.nsec;
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else return sec <= r.sec;
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RealTime operator/(int d) const;
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* Return the ratio of two times.
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double operator/(const RealTime &r) const;
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* Return a human-readable debug-type string to full precision
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* (probably not a format to show to a user directly)
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std::string toString() const;
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* Return a user-readable string to the nearest millisecond
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* in a form like HH:MM:SS.mmm
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std::string toText(bool fixedDp = false) const;
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* Convert a RealTime into a sample frame at the given sample rate.
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static long realTime2Frame(const RealTime &r, unsigned int sampleRate);
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* Convert a sample frame at the given sample rate into a RealTime.
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static RealTime frame2RealTime(long frame, unsigned int sampleRate);
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static const RealTime zeroTime;
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std::ostream &operator<<(std::ostream &out, const RealTime &rt);
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_VAMP_SDK_PLUGSPACE_END(RealTime.h)