1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
2
3 /*
4 Vamp
5
6 An API for audio analysis and feature extraction plugins.
7
8 Centre for Digital Music, Queen Mary, University of London.
9 Copyright 2006 Chris Cannam.
10
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:
18
19 The above copyright notice and this permission notice shall be
20 included in all copies or substantial portions of the Software.
21
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.
29
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
34 authorization.
35 */
36
37 /*
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.
42 */
43
44 #include <iostream>
45
46 #if (__GNUC__ < 3)
47 #include <strstream>
48 #define stringstream strstream
49 #else
50 #include <sstream>
51 #endif
52
53 using std::cerr;
54 using std::endl;
55
56 #ifndef _WIN32
57 #include <sys/time.h>
58 #endif
59
60 #include <vamp-sdk/RealTime.h>
61
62 _VAMP_SDK_PLUGSPACE_BEGIN(RealTime.cpp)
63
64 namespace Vamp {
65
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.
71 //
72 // The maximum valid RealTime on a 32-bit system is somewhere around
73 // 68 years: 999999999 nanoseconds longer than the classic Unix epoch.
74
75 #define ONE_BILLION 1000000000
76
RealTime(int s,int n)77 RealTime::RealTime(int s, int n) :
78 sec(s), nsec(n)
79 {
80 if (sec == 0) {
81 while (nsec <= -ONE_BILLION) { nsec += ONE_BILLION; --sec; }
82 while (nsec >= ONE_BILLION) { nsec -= ONE_BILLION; ++sec; }
83 } else if (sec < 0) {
84 while (nsec <= -ONE_BILLION) { nsec += ONE_BILLION; --sec; }
85 while (nsec > 0) { nsec -= ONE_BILLION; ++sec; }
86 } else {
87 while (nsec >= ONE_BILLION) { nsec -= ONE_BILLION; ++sec; }
88 while (nsec < 0) { nsec += ONE_BILLION; --sec; }
89 }
90 }
91
92 RealTime
fromSeconds(double sec)93 RealTime::fromSeconds(double sec)
94 {
95 return RealTime(int(sec), int((sec - int(sec)) * ONE_BILLION + 0.5));
96 }
97
98 RealTime
fromMilliseconds(int msec)99 RealTime::fromMilliseconds(int msec)
100 {
101 return RealTime(msec / 1000, (msec % 1000) * 1000000);
102 }
103
104 #ifndef _WIN32
105 RealTime
fromTimeval(const struct timeval & tv)106 RealTime::fromTimeval(const struct timeval &tv)
107 {
108 return RealTime(tv.tv_sec, tv.tv_usec * 1000);
109 }
110 #endif
111
operator <<(std::ostream & out,const RealTime & rt)112 std::ostream &operator<<(std::ostream &out, const RealTime &rt)
113 {
114 if (rt < RealTime::zeroTime) {
115 out << "-";
116 } else {
117 out << " ";
118 }
119
120 int s = (rt.sec < 0 ? -rt.sec : rt.sec);
121 int n = (rt.nsec < 0 ? -rt.nsec : rt.nsec);
122
123 out << s << ".";
124
125 int nn(n);
126 if (nn == 0) out << "00000000";
127 else while (nn < (ONE_BILLION / 10)) {
128 out << "0";
129 nn *= 10;
130 }
131
132 out << n << "R";
133 return out;
134 }
135
136 std::string
toString() const137 RealTime::toString() const
138 {
139 std::stringstream out;
140 out << *this;
141
142 #if (__GNUC__ < 3)
143 out << std::ends;
144 #endif
145
146 std::string s = out.str();
147
148 // remove trailing R
149 return s.substr(0, s.length() - 1);
150 }
151
152 std::string
toText(bool fixedDp) const153 RealTime::toText(bool fixedDp) const
154 {
155 if (*this < RealTime::zeroTime) return "-" + (-*this).toText();
156
157 std::stringstream out;
158
159 if (sec >= 3600) {
160 out << (sec / 3600) << ":";
161 }
162
163 if (sec >= 60) {
164 out << (sec % 3600) / 60 << ":";
165 }
166
167 if (sec >= 10) {
168 out << ((sec % 60) / 10);
169 }
170
171 out << (sec % 10);
172
173 int ms = msec();
174
175 if (ms != 0) {
176 out << ".";
177 out << (ms / 100);
178 ms = ms % 100;
179 if (ms != 0) {
180 out << (ms / 10);
181 ms = ms % 10;
182 } else if (fixedDp) {
183 out << "0";
184 }
185 if (ms != 0) {
186 out << ms;
187 } else if (fixedDp) {
188 out << "0";
189 }
190 } else if (fixedDp) {
191 out << ".000";
192 }
193
194 #if (__GNUC__ < 3)
195 out << std::ends;
196 #endif
197
198 std::string s = out.str();
199
200 return s;
201 }
202
203
204 RealTime
operator /(int d) const205 RealTime::operator/(int d) const
206 {
207 int secdiv = sec / d;
208 int secrem = sec % d;
209
210 double nsecdiv = (double(nsec) + ONE_BILLION * double(secrem)) / d;
211
212 return RealTime(secdiv, int(nsecdiv + 0.5));
213 }
214
215 double
operator /(const RealTime & r) const216 RealTime::operator/(const RealTime &r) const
217 {
218 double lTotal = double(sec) * ONE_BILLION + double(nsec);
219 double rTotal = double(r.sec) * ONE_BILLION + double(r.nsec);
220
221 if (rTotal == 0) return 0.0;
222 else return lTotal/rTotal;
223 }
224
225 long
realTime2Frame(const RealTime & time,unsigned int sampleRate)226 RealTime::realTime2Frame(const RealTime &time, unsigned int sampleRate)
227 {
228 if (time < zeroTime) return -realTime2Frame(-time, sampleRate);
229 double s = time.sec + double(time.nsec + 1) / 1000000000.0;
230 return long(s * sampleRate);
231 }
232
233 RealTime
frame2RealTime(long frame,unsigned int sampleRate)234 RealTime::frame2RealTime(long frame, unsigned int sampleRate)
235 {
236 if (frame < 0) return -frame2RealTime(-frame, sampleRate);
237
238 RealTime rt;
239 rt.sec = frame / long(sampleRate);
240 frame -= rt.sec * long(sampleRate);
241 rt.nsec = (int)(((double(frame) * 1000000.0) / sampleRate) * 1000.0);
242 return rt;
243 }
244
245 const RealTime RealTime::zeroTime(0,0);
246
247 }
248
249 _VAMP_SDK_PLUGSPACE_END(RealTime.cpp)
250
251
252
253