1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
6 An API for audio analysis and feature extraction plugins.
8 Centre for Digital Music, Queen Mary, University of London.
9 Copyright 2006 Chris Cannam.
11 Permission is hereby granted, free of charge, to any person
12 obtaining a copy of this software and associated documentation
13 files (the "Software"), to deal in the Software without
14 restriction, including without limitation the rights to use, copy,
15 modify, merge, publish, distribute, sublicense, and/or sell copies
16 of the Software, and to permit persons to whom the Software is
17 furnished to do so, subject to the following conditions:
19 The above copyright notice and this permission notice shall be
20 included in all copies or substantial portions of the Software.
22 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
23 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
24 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
25 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
26 ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
27 CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
28 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
30 Except as contained in this notice, the names of the Centre for
31 Digital Music; Queen Mary, University of London; and Chris Cannam
32 shall not be used in advertising or otherwise to promote the sale,
33 use or other dealings in this Software without prior written
38 This is a modified version of a source file from the
39 Rosegarden MIDI and audio sequencer and notation editor.
40 This file copyright 2000-2006 Chris Cannam.
41 Relicensed by the author as detailed above.
48 #define stringstream strstream
60 #include <vamp-sdk/RealTime.h>
62 _VAMP_SDK_PLUGSPACE_BEGIN(RealTime.cpp)
66 // A RealTime consists of two ints that must be at least 32 bits each.
67 // A signed 32-bit int can store values exceeding +/- 2 billion. This
68 // means we can safely use our lower int for nanoseconds, as there are
69 // 1 billion nanoseconds in a second and we need to handle double that
70 // because of the implementations of addition etc that we use.
72 // The maximum valid RealTime on a 32-bit system is somewhere around
73 // 68 years: 999999999 nanoseconds longer than the classic Unix epoch.
75 #define ONE_BILLION 1000000000
77 RealTime::RealTime(int s, int n) :
81 while (nsec <= -ONE_BILLION) { nsec += ONE_BILLION; --sec; }
82 while (nsec >= ONE_BILLION) { nsec -= ONE_BILLION; ++sec; }
84 while (nsec <= -ONE_BILLION) { nsec += ONE_BILLION; --sec; }
85 while (nsec > 0) { nsec -= ONE_BILLION; ++sec; }
87 while (nsec >= ONE_BILLION) { nsec -= ONE_BILLION; ++sec; }
88 while (nsec < 0) { nsec += ONE_BILLION; --sec; }
93 RealTime::fromSeconds(double sec)
95 return RealTime(int(sec), int((sec - int(sec)) * ONE_BILLION + 0.5));
99 RealTime::fromMilliseconds(int msec)
101 return RealTime(msec / 1000, (msec % 1000) * 1000000);
106 RealTime::fromTimeval(const struct timeval &tv)
108 return RealTime(tv.tv_sec, tv.tv_usec * 1000);
112 std::ostream &operator<<(std::ostream &out, const RealTime &rt)
114 if (rt < RealTime::zeroTime) {
120 int s = (rt.sec < 0 ? -rt.sec : rt.sec);
121 int n = (rt.nsec < 0 ? -rt.nsec : rt.nsec);
126 if (nn == 0) out << "00000000";
127 else while (nn < (ONE_BILLION / 10)) {
137 RealTime::toString() const
139 std::stringstream out;
146 std::string s = out.str();
149 return s.substr(0, s.length() - 1);
153 RealTime::toText(bool fixedDp) const
155 if (*this < RealTime::zeroTime) return "-" + (-*this).toText();
157 std::stringstream out;
160 out << (sec / 3600) << ":";
164 out << (sec % 3600) / 60 << ":";
168 out << ((sec % 60) / 10);
182 } else if (fixedDp) {
187 } else if (fixedDp) {
190 } else if (fixedDp) {
198 std::string s = out.str();
205 RealTime::operator/(int d) const
207 int secdiv = sec / d;
208 int secrem = sec % d;
210 double nsecdiv = (double(nsec) + ONE_BILLION * double(secrem)) / d;
212 return RealTime(secdiv, int(nsecdiv + 0.5));
216 RealTime::operator/(const RealTime &r) const
218 double lTotal = double(sec) * ONE_BILLION + double(nsec);
219 double rTotal = double(r.sec) * ONE_BILLION + double(r.nsec);
221 if (rTotal == 0) return 0.0;
222 else return lTotal/rTotal;
226 RealTime::realTime2Frame(const RealTime &time, unsigned int sampleRate)
228 if (time < zeroTime) return -realTime2Frame(-time, sampleRate);
229 double s = time.sec + double(time.nsec + 1) / 1000000000.0;
230 return long(s * sampleRate);
234 RealTime::frame2RealTime(long frame, unsigned int sampleRate)
236 if (frame < 0) return -frame2RealTime(-frame, sampleRate);
239 rt.sec = frame / long(sampleRate);
240 frame -= rt.sec * long(sampleRate);
241 rt.nsec = (int)(((double(frame) * 1000000.0) / sampleRate) * 1000.0);
245 const RealTime RealTime::zeroTime(0,0);
249 _VAMP_SDK_PLUGSPACE_END(RealTime.cpp)