annotate src/vamp-sdk/RealTime.cpp @ 541:0e32c328b02a tip

Added tag vamp-plugin-sdk-v2.10 for changeset fa74c473e48c
author Chris Cannam
date Mon, 18 May 2020 11:53:49 +0100
parents 8ede825a54f6
children
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@10 40 This file copyright 2000-2006 Chris Cannam.
cannam@10 41 Relicensed by the author as detailed above.
cannam@3 42 */
cannam@3 43
cannam@3 44 #include <iostream>
Chris@499 45 #include <limits.h>
cannam@3 46
Chris@479 47 #if (defined(__GNUC__)) && (__GNUC__ < 3)
cannam@3 48 #include <strstream>
cannam@3 49 #define stringstream strstream
cannam@3 50 #else
cannam@3 51 #include <sstream>
cannam@3 52 #endif
cannam@3 53
cannam@3 54 using std::cerr;
cannam@3 55 using std::endl;
cannam@3 56
cannam@80 57 #ifndef _WIN32
cannam@82 58 #include <sys/time.h>
cannam@80 59 #endif
cannam@3 60
cannam@230 61 #include <vamp-sdk/RealTime.h>
cannam@230 62
cannam@233 63 _VAMP_SDK_PLUGSPACE_BEGIN(RealTime.cpp)
cannam@230 64
cannam@3 65 namespace Vamp {
cannam@3 66
cannam@3 67 // A RealTime consists of two ints that must be at least 32 bits each.
cannam@3 68 // A signed 32-bit int can store values exceeding +/- 2 billion. This
cannam@3 69 // means we can safely use our lower int for nanoseconds, as there are
cannam@3 70 // 1 billion nanoseconds in a second and we need to handle double that
cannam@3 71 // because of the implementations of addition etc that we use.
cannam@3 72 //
cannam@3 73 // The maximum valid RealTime on a 32-bit system is somewhere around
cannam@3 74 // 68 years: 999999999 nanoseconds longer than the classic Unix epoch.
cannam@3 75
cannam@3 76 #define ONE_BILLION 1000000000
cannam@3 77
cannam@3 78 RealTime::RealTime(int s, int n) :
cannam@3 79 sec(s), nsec(n)
cannam@3 80 {
Chris@499 81 while (nsec <= -ONE_BILLION && sec > INT_MIN) { nsec += ONE_BILLION; --sec; }
Chris@499 82 while (nsec >= ONE_BILLION && sec < INT_MAX) { nsec -= ONE_BILLION; ++sec; }
Chris@499 83 while (nsec > 0 && sec < 0) { nsec -= ONE_BILLION; ++sec; }
Chris@499 84 while (nsec < 0 && sec > 0) { nsec += ONE_BILLION; --sec; }
cannam@3 85 }
cannam@3 86
cannam@3 87 RealTime
cannam@3 88 RealTime::fromSeconds(double sec)
cannam@3 89 {
Chris@414 90 if (sec != sec) { // NaN
Chris@414 91 cerr << "ERROR: NaN/Inf passed to Vamp::RealTime::fromSeconds" << endl;
Chris@414 92 return RealTime::zeroTime;
Chris@414 93 } else if (sec >= 0) {
Chris@413 94 return RealTime(int(sec), int((sec - int(sec)) * ONE_BILLION + 0.5));
Chris@413 95 } else {
Chris@413 96 return -fromSeconds(-sec);
Chris@413 97 }
cannam@3 98 }
cannam@3 99
cannam@3 100 RealTime
cannam@3 101 RealTime::fromMilliseconds(int msec)
cannam@3 102 {
cannam@3 103 return RealTime(msec / 1000, (msec % 1000) * 1000000);
cannam@3 104 }
cannam@3 105
cannam@80 106 #ifndef _WIN32
cannam@3 107 RealTime
cannam@3 108 RealTime::fromTimeval(const struct timeval &tv)
cannam@3 109 {
Chris@421 110 return RealTime(int(tv.tv_sec), int(tv.tv_usec * 1000));
cannam@3 111 }
cannam@80 112 #endif
cannam@3 113
cannam@3 114 std::ostream &operator<<(std::ostream &out, const RealTime &rt)
cannam@3 115 {
cannam@3 116 if (rt < RealTime::zeroTime) {
cannam@3 117 out << "-";
cannam@3 118 } else {
cannam@3 119 out << " ";
cannam@3 120 }
cannam@3 121
cannam@3 122 int s = (rt.sec < 0 ? -rt.sec : rt.sec);
cannam@3 123 int n = (rt.nsec < 0 ? -rt.nsec : rt.nsec);
cannam@3 124
cannam@3 125 out << s << ".";
cannam@3 126
cannam@3 127 int nn(n);
cannam@3 128 if (nn == 0) out << "00000000";
cannam@3 129 else while (nn < (ONE_BILLION / 10)) {
cannam@3 130 out << "0";
cannam@3 131 nn *= 10;
cannam@3 132 }
cannam@3 133
cannam@3 134 out << n << "R";
cannam@3 135 return out;
cannam@3 136 }
cannam@3 137
cannam@3 138 std::string
cannam@3 139 RealTime::toString() const
cannam@3 140 {
cannam@3 141 std::stringstream out;
cannam@3 142 out << *this;
cannam@3 143
cannam@3 144 std::string s = out.str();
cannam@3 145
cannam@3 146 // remove trailing R
cannam@3 147 return s.substr(0, s.length() - 1);
cannam@3 148 }
cannam@3 149
cannam@3 150 std::string
cannam@3 151 RealTime::toText(bool fixedDp) const
cannam@3 152 {
Chris@475 153 if (*this < RealTime::zeroTime) return "-" + (-*this).toText(fixedDp);
cannam@3 154
cannam@3 155 std::stringstream out;
cannam@3 156
cannam@3 157 if (sec >= 3600) {
Chris@413 158 out << (sec / 3600) << ":";
cannam@3 159 }
Chris@413 160
cannam@3 161 if (sec >= 60) {
Chris@413 162 int minutes = (sec % 3600) / 60;
Chris@413 163 if (sec >= 3600 && minutes < 10) out << "0";
Chris@413 164 out << minutes << ":";
cannam@3 165 }
Chris@413 166
cannam@3 167 if (sec >= 10) {
Chris@413 168 out << ((sec % 60) / 10);
cannam@3 169 }
Chris@413 170
cannam@3 171 out << (sec % 10);
cannam@3 172
cannam@3 173 int ms = msec();
cannam@3 174
cannam@3 175 if (ms != 0) {
cannam@3 176 out << ".";
cannam@3 177 out << (ms / 100);
cannam@3 178 ms = ms % 100;
cannam@3 179 if (ms != 0) {
cannam@3 180 out << (ms / 10);
cannam@3 181 ms = ms % 10;
cannam@3 182 } else if (fixedDp) {
cannam@3 183 out << "0";
cannam@3 184 }
cannam@3 185 if (ms != 0) {
cannam@3 186 out << ms;
cannam@3 187 } else if (fixedDp) {
cannam@3 188 out << "0";
cannam@3 189 }
cannam@3 190 } else if (fixedDp) {
cannam@3 191 out << ".000";
cannam@3 192 }
cannam@3 193
cannam@3 194 std::string s = out.str();
cannam@3 195
cannam@3 196 return s;
cannam@3 197 }
cannam@3 198
cannam@3 199 RealTime
cannam@3 200 RealTime::operator/(int d) const
cannam@3 201 {
cannam@3 202 int secdiv = sec / d;
cannam@3 203 int secrem = sec % d;
cannam@3 204
cannam@3 205 double nsecdiv = (double(nsec) + ONE_BILLION * double(secrem)) / d;
cannam@3 206
cannam@3 207 return RealTime(secdiv, int(nsecdiv + 0.5));
cannam@3 208 }
cannam@3 209
cannam@3 210 double
cannam@3 211 RealTime::operator/(const RealTime &r) const
cannam@3 212 {
cannam@3 213 double lTotal = double(sec) * ONE_BILLION + double(nsec);
cannam@3 214 double rTotal = double(r.sec) * ONE_BILLION + double(r.nsec);
cannam@3 215
cannam@3 216 if (rTotal == 0) return 0.0;
cannam@3 217 else return lTotal/rTotal;
cannam@3 218 }
cannam@3 219
cannam@3 220 long
cannam@3 221 RealTime::realTime2Frame(const RealTime &time, unsigned int sampleRate)
cannam@3 222 {
cannam@3 223 if (time < zeroTime) return -realTime2Frame(-time, sampleRate);
Chris@475 224 double s = time.sec + double(time.nsec) / ONE_BILLION;
Chris@475 225 return long(s * sampleRate + 0.5);
cannam@3 226 }
cannam@3 227
cannam@3 228 RealTime
cannam@3 229 RealTime::frame2RealTime(long frame, unsigned int sampleRate)
cannam@3 230 {
cannam@3 231 if (frame < 0) return -frame2RealTime(-frame, sampleRate);
cannam@3 232
Chris@475 233 int sec = int(frame / long(sampleRate));
Chris@475 234 frame -= sec * long(sampleRate);
Chris@475 235 int nsec = (int)((double(frame) / double(sampleRate)) * ONE_BILLION + 0.5);
Chris@475 236 // Use ctor here instead of setting data members directly to
Chris@475 237 // ensure nsec > ONE_BILLION is handled properly. It's extremely
Chris@475 238 // unlikely, but not impossible.
Chris@475 239 return RealTime(sec, nsec);
cannam@3 240 }
cannam@3 241
cannam@3 242 const RealTime RealTime::zeroTime(0,0);
cannam@3 243
cannam@3 244 }
cannam@230 245
cannam@233 246 _VAMP_SDK_PLUGSPACE_END(RealTime.cpp)
cannam@230 247
cannam@230 248
cannam@233 249