2 duration-convert.cc -- implement Duration_convert
4 source file of the LilyPond music typesetter
6 (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
7 Jan Nieuwenhuizen <jan@digicash.com>
10 #include "duration-convert.hh"
13 // statics Duration_convert
14 bool const Duration_convert::midi_as_plet_b_s = true;
15 bool Duration_convert::no_quantify_b_s = false;
16 bool Duration_convert::no_double_dots_b_s = false;
17 bool Duration_convert::no_triplets_b_s = false;
18 int Duration_convert::no_smaller_than_i_s = 0;
19 Array<Duration> Duration_convert::dur_array_s;
22 Duration_convert::dur2_str(Duration dur)
25 return String("[") + String(dur.ticks_i_) + "]";
28 if (dur.durlog_i_ <= 0)
31 str= String(type2_i(dur.durlog_i_));
32 str += String('.', dur.dots_i_);
34 str += String("*") + String(dur.plet_.iso_i_)
35 + String("/") + String(dur.plet_.type_i_);
41 Duration_convert::dur2_i(Duration dur, int division_1_i)
43 return dur2_mom(dur) * Moment(division_1_i);
48 Duration_convert::dur2ticks_i(Duration dur)
52 return dur2_mom(dur) * Moment(Duration::division_1_i_s);
57 Duration_convert::i2_type(int i)
68 Duration_convert::type2_i(int type)
77 Duration_convert::dur2_mom(Duration dur)
80 return Moment(dur.ticks_i_, Duration::division_1_i_s);
83 if (dur.durlog_i_<-10)
87 mom = Moment(type2_i(-dur.durlog_i_), 1);
89 mom = Moment(1 , type2_i(dur.durlog_i_));
98 return mom * plet_factor_mom(dur);
103 Duration_convert::i2_mom(int time_i, int division_1_i)
108 if (division_1_i > 0)
109 return Moment(time_i, division_1_i);
111 return Moment(-division_1_i, time_i);
116 Duration_convert::mom2_dur(Moment mom)
126 Duration dur = mom2standardised_dur(mom);
127 // if (!dur.mom() || (dur.mom() == mom))
128 if (!dur.length() || (dur.length() == mom))
130 assert(midi_as_plet_b_s);
132 // dur.set_plet(type_mom, Duration::division_1_i_s / 4);
134 // Moment as_plet_mom = mom / dur.mom();
135 Moment as_plet_mom = mom / dur.length();
136 as_plet_mom *= dur.plet_.mom();
137 long num = as_plet_mom.numerator().as_long();
138 long den = as_plet_mom.denominator().as_long();
139 dur.set_plet(num, den);
144 Duration_convert::mom2standardised_dur(Moment mom)
146 // if (!dur_array_s.length_i())
147 if (!dur_array_s.size())
149 assert(dur_array_s.size());
150 for (int i = 0; i < dur_array_s.size() - 1; i++)
152 Moment lower_mom = dur2_mom(dur_array_s[ i ]);
153 if (mom <= lower_mom)
155 // all arbitrary, but 3/4 will get rid of the noise...
157 if (i || (mom / lower_mom > Moment(3, 4)))
158 return dur_array_s[ i ];
166 Moment upper_mom = dur2_mom(dur_array_s[ i + 1 ]);
167 if ((mom < upper_mom)
168 && ((mom - lower_mom) / lower_mom
169 < (upper_mom - mom) / upper_mom))
170 return dur_array_s[ i ];
172 return dur_array_s[ dur_array_s.size() - 1 ];
176 Duration_convert::set_array()
180 Duration_iterator iter_dur;
183 dur_array_s.push(iter_dur++);
188 Duration_convert::plet_factor_mom(Duration dur)
190 return dur.plet_.mom();
194 Duration_convert::sync_f(Duration dur, Moment mom)
196 return mom / dur2_mom(dur);
200 Duration_convert::ticks2_dur(int ticks_i)
202 // Duration dur(4, 0);
203 // dur.set_plet(ticks_i, Duration::division_1_i_s / 4);
205 Moment mom(ticks_i, Duration::division_1_i_s);
206 if (midi_as_plet_b_s)
207 return mom2_dur(mom);
209 Duration dur = mom2standardised_dur(mom);
211 // if (dur.mom() == mom)
212 if (dur.length() == mom)
217 dur.durlog_i_ = -100;
219 dur.set_ticks(ticks_i);
222 return mom2_dur(mom);
227 Duration_convert::ticks2standardised_dur(int ticks_i)
229 Moment mom(ticks_i, Duration::division_1_i_s);
230 Duration dur = mom2standardised_dur(mom);
234 Duration_iterator::Duration_iterator()
236 cursor_dur_.durlog_i_ = 7;
237 if (Duration_convert::no_smaller_than_i_s)
238 cursor_dur_.durlog_i_ = Duration_convert::no_smaller_than_i_s;
239 // cursor_dur_.set_plet(1, 1);
243 Duration_iterator::operator ++(int)
245 return forward_dur();
249 Duration_iterator::operator ()()
254 Duration_iterator::operator bool()
260 Duration_iterator::dur()
266 Duration_iterator::forward_dur()
268 /* should do smart table? guessing:
282 Duration dur = cursor_dur_;
284 if (!cursor_dur_.dots_i_ && !cursor_dur_.plet_b())
286 cursor_dur_.durlog_i_ += 1;
287 cursor_dur_.dots_i_ = 2;
289 else if (cursor_dur_.dots_i_ == 2)
291 assert(!cursor_dur_.plet_b());
292 cursor_dur_.dots_i_ = 0;
293 cursor_dur_.durlog_i_ -=2;
294 cursor_dur_.set_plet(2, 3);
296 else if (cursor_dur_.plet_b()
297 && (cursor_dur_.plet_.iso_i_ == 2)
298 && (cursor_dur_.plet_.type_i_ == 3))
300 assert(!cursor_dur_.dots_i_);
301 cursor_dur_.set_plet(1, 1);
302 cursor_dur_.durlog_i_ += 1;
303 cursor_dur_.dots_i_ = 1;
305 else if (cursor_dur_.dots_i_ == 1)
307 assert(!cursor_dur_.plet_b());
308 cursor_dur_.dots_i_ = 0;
309 cursor_dur_.durlog_i_ -= 1;
312 if (Duration_convert::no_triplets_b_s
313 && cursor_dur_.plet_b() && ok())
315 if (Duration_convert::no_double_dots_b_s
316 && (cursor_dur_.dots_i_ == 2) && ok())
318 if (Duration_convert::no_smaller_than_i_s
319 && (cursor_dur_.durlog_i_ > Duration_convert::no_smaller_than_i_s) && ok())
321 if (Duration_convert::no_smaller_than_i_s
322 && cursor_dur_.dots_i_
323 && (cursor_dur_.durlog_i_ >= Duration_convert::no_smaller_than_i_s)
326 if (Duration_convert::no_smaller_than_i_s
327 && (cursor_dur_.dots_i_ == 2)
328 && (cursor_dur_.durlog_i_ >= Duration_convert::no_smaller_than_i_s / 2)
336 Duration_iterator::ok()
338 return (cursor_dur_.durlog_i_
339 && !((cursor_dur_.durlog_i_ == 0) && (cursor_dur_.dots_i_ > 2)));