annotate vamp-sdk/RealTime.h @ 6:8f10d35a4090

* Fix leftover reference to X Consortium in copyright note!
author cannam
date Fri, 31 Mar 2006 16:26:28 +0000
parents b075cddf70a6
children 83d3eb580731
rev   line source
cannam@3 1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
cannam@3 2
cannam@3 3 /*
cannam@3 4 Vamp
cannam@3 5
cannam@3 6 An API for audio analysis and feature extraction plugins.
cannam@3 7
cannam@3 8 Centre for Digital Music, Queen Mary, University of London.
cannam@3 9 Copyright 2006 Chris Cannam.
cannam@3 10
cannam@3 11 Permission is hereby granted, free of charge, to any person
cannam@3 12 obtaining a copy of this software and associated documentation
cannam@3 13 files (the "Software"), to deal in the Software without
cannam@3 14 restriction, including without limitation the rights to use, copy,
cannam@3 15 modify, merge, publish, distribute, sublicense, and/or sell copies
cannam@3 16 of the Software, and to permit persons to whom the Software is
cannam@3 17 furnished to do so, subject to the following conditions:
cannam@3 18
cannam@3 19 The above copyright notice and this permission notice shall be
cannam@3 20 included in all copies or substantial portions of the Software.
cannam@3 21
cannam@3 22 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
cannam@3 23 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
cannam@3 24 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
cannam@6 25 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
cannam@3 26 ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
cannam@3 27 CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
cannam@3 28 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
cannam@3 29
cannam@3 30 Except as contained in this notice, the names of the Centre for
cannam@3 31 Digital Music; Queen Mary, University of London; and Chris Cannam
cannam@3 32 shall not be used in advertising or otherwise to promote the sale,
cannam@3 33 use or other dealings in this Software without prior written
cannam@3 34 authorization.
cannam@3 35 */
cannam@3 36
cannam@3 37 /*
cannam@3 38 This is a modified version of a source file from the
cannam@3 39 Rosegarden MIDI and audio sequencer and notation editor.
cannam@3 40 This file copyright 2000-2006 Chris Cannam; relicensed as detailed above
cannam@3 41 */
cannam@3 42
cannam@5 43 #ifndef _VAMP_REAL_TIME_H_
cannam@5 44 #define _VAMP_REAL_TIME_H_
cannam@3 45
cannam@3 46 #include <iostream>
cannam@3 47 #include <string>
cannam@3 48
cannam@3 49 struct timeval;
cannam@3 50
cannam@3 51 namespace Vamp {
cannam@3 52
cannam@3 53 /**
cannam@3 54 * RealTime represents time values to nanosecond precision
cannam@3 55 * with accurate arithmetic and frame-rate conversion functions.
cannam@3 56 */
cannam@3 57
cannam@3 58 struct RealTime
cannam@3 59 {
cannam@3 60 int sec;
cannam@3 61 int nsec;
cannam@3 62
cannam@3 63 int usec() const { return nsec / 1000; }
cannam@3 64 int msec() const { return nsec / 1000000; }
cannam@3 65
cannam@3 66 RealTime(): sec(0), nsec(0) {}
cannam@3 67 RealTime(int s, int n);
cannam@3 68
cannam@3 69 RealTime(const RealTime &r) :
cannam@3 70 sec(r.sec), nsec(r.nsec) { }
cannam@3 71
cannam@3 72 static RealTime fromSeconds(double sec);
cannam@3 73 static RealTime fromMilliseconds(int msec);
cannam@3 74 static RealTime fromTimeval(const struct timeval &);
cannam@3 75
cannam@3 76 RealTime &operator=(const RealTime &r) {
cannam@3 77 sec = r.sec; nsec = r.nsec; return *this;
cannam@3 78 }
cannam@3 79
cannam@3 80 RealTime operator+(const RealTime &r) const {
cannam@3 81 return RealTime(sec + r.sec, nsec + r.nsec);
cannam@3 82 }
cannam@3 83 RealTime operator-(const RealTime &r) const {
cannam@3 84 return RealTime(sec - r.sec, nsec - r.nsec);
cannam@3 85 }
cannam@3 86 RealTime operator-() const {
cannam@3 87 return RealTime(-sec, -nsec);
cannam@3 88 }
cannam@3 89
cannam@3 90 bool operator <(const RealTime &r) const {
cannam@3 91 if (sec == r.sec) return nsec < r.nsec;
cannam@3 92 else return sec < r.sec;
cannam@3 93 }
cannam@3 94
cannam@3 95 bool operator >(const RealTime &r) const {
cannam@3 96 if (sec == r.sec) return nsec > r.nsec;
cannam@3 97 else return sec > r.sec;
cannam@3 98 }
cannam@3 99
cannam@3 100 bool operator==(const RealTime &r) const {
cannam@3 101 return (sec == r.sec && nsec == r.nsec);
cannam@3 102 }
cannam@3 103
cannam@3 104 bool operator!=(const RealTime &r) const {
cannam@3 105 return !(r == *this);
cannam@3 106 }
cannam@3 107
cannam@3 108 bool operator>=(const RealTime &r) const {
cannam@3 109 if (sec == r.sec) return nsec >= r.nsec;
cannam@3 110 else return sec >= r.sec;
cannam@3 111 }
cannam@3 112
cannam@3 113 bool operator<=(const RealTime &r) const {
cannam@3 114 if (sec == r.sec) return nsec <= r.nsec;
cannam@3 115 else return sec <= r.sec;
cannam@3 116 }
cannam@3 117
cannam@3 118 RealTime operator/(int d) const;
cannam@3 119
cannam@3 120 // Find the fractional difference between times
cannam@3 121 //
cannam@3 122 double operator/(const RealTime &r) const;
cannam@3 123
cannam@3 124 // Return a human-readable debug-type string to full precision
cannam@3 125 // (probably not a format to show to a user directly)
cannam@3 126 //
cannam@3 127 std::string toString() const;
cannam@3 128
cannam@3 129 // Return a user-readable string to the nearest millisecond
cannam@3 130 // in a form like HH:MM:SS.mmm
cannam@3 131 //
cannam@3 132 std::string toText(bool fixedDp = false) const;
cannam@3 133
cannam@3 134 // Convenience functions for handling sample frames
cannam@3 135 //
cannam@3 136 static long realTime2Frame(const RealTime &r, unsigned int sampleRate);
cannam@3 137 static RealTime frame2RealTime(long frame, unsigned int sampleRate);
cannam@3 138
cannam@3 139 static const RealTime zeroTime;
cannam@3 140 };
cannam@3 141
cannam@3 142 std::ostream &operator<<(std::ostream &out, const RealTime &rt);
cannam@3 143
cannam@3 144 }
cannam@3 145
cannam@3 146 #endif