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)
29 str = String ( type2_i (dur.durlog_i_) );
30 else if (dur.durlog_i_ == -1)
32 else if (dur.durlog_i_ == -2)
34 str += String ('.', dur.dots_i_);
36 str += String ("*") + String (dur.plet_.iso_i_)
37 + String ("/") + String (dur.plet_.type_i_);
42 Duration_convert::dur2ticks_i (Duration dur)
46 return dur2_mom (dur) * Moment (Duration::division_1_i_s);
51 Duration_convert::i2_type (int i)
62 Duration_convert::type2_i (int type)
71 Duration_convert::dur2_mom (Duration dur)
74 return Moment (dur.ticks_i_, Duration::division_1_i_s);
77 if (dur.durlog_i_<-10)
81 mom = Moment (type2_i (-dur.durlog_i_), 1);
83 mom = Moment (1 , type2_i (dur.durlog_i_));
92 return mom * plet_factor_mom (dur);
96 Duration_convert::mom2_dur (Moment mom)
106 Duration dur = mom2standardised_dur (mom);
107 // if (!dur.mom () || (dur.mom () == mom))
108 if (!dur.length () || (dur.length () == mom))
110 assert (midi_as_plet_b_s);
112 // dur.set_plet (type_mom, Duration::division_1_i_s / 4);
114 // Moment as_plet_mom = mom / dur.mom ();
115 Moment as_plet_mom = mom / dur.length ();
116 as_plet_mom *= dur.plet_.mom ();
117 long num = as_plet_mom.num ();
118 long den = as_plet_mom.den ();
119 dur.set_plet (num, den);
124 Duration_convert::mom2standardised_dur (Moment mom)
126 // if (!dur_array_s.length_i ())
127 if (!dur_array_s.size ())
129 assert (dur_array_s.size ());
130 for (int i = 0; i < dur_array_s.size () - 1; i++)
132 Moment lower_mom = dur2_mom (dur_array_s[ i ]);
133 if (mom <= lower_mom)
135 // all arbitrary, but 3/4 will get rid of the noise...
137 if (i || (mom / lower_mom > Moment (3, 4)))
138 return dur_array_s[ i ];
146 Moment upper_mom = dur2_mom (dur_array_s[ i + 1 ]);
147 if ((mom < upper_mom)
148 && ((mom - lower_mom) / lower_mom
149 < (upper_mom - mom) / upper_mom))
150 return dur_array_s[ i ];
152 return dur_array_s[ dur_array_s.size () - 1 ];
156 Duration_convert::set_array ()
158 dur_array_s.clear ();
160 Duration_iterator iter_dur;
163 dur_array_s.push (iter_dur++);
168 Duration_convert::plet_factor_mom (Duration dur)
170 return dur.plet_.mom ();
174 Duration_convert::sync_f (Duration dur, Moment mom)
176 return mom / dur2_mom (dur);
180 Duration_convert::ticks2_dur (int ticks_i)
182 Moment mom (ticks_i, Duration::division_1_i_s);
183 if (midi_as_plet_b_s)
184 return mom2_dur (mom);
186 Duration dur = mom2standardised_dur (mom);
188 if (dur.length () == mom)
191 return mom2_dur (mom);
195 Duration_convert::ticks2standardised_dur (int ticks_i)
197 Moment mom (ticks_i, Duration::division_1_i_s);
198 Duration dur = mom2standardised_dur (mom);
202 Duration_iterator::Duration_iterator ()
204 cursor_dur_.durlog_i_ = 7;
205 if (Duration_convert::no_smaller_than_i_s)
206 cursor_dur_.durlog_i_ = Duration_convert::no_smaller_than_i_s;
210 Duration_iterator::operator ++(int)
212 return forward_dur ();
216 Duration_iterator::operator ()()
221 Duration_iterator::operator bool ()
227 Duration_iterator::dur ()
233 Duration_iterator::forward_dur ()
235 /* should do smart table? guessing:
249 Duration dur = cursor_dur_;
251 if (!cursor_dur_.dots_i_ && !cursor_dur_.plet_b ())
253 cursor_dur_.durlog_i_ += 1;
254 cursor_dur_.dots_i_ = 2;
256 else if (cursor_dur_.dots_i_ == 2)
258 assert (!cursor_dur_.plet_b ());
259 cursor_dur_.dots_i_ = 0;
260 cursor_dur_.durlog_i_ -=2;
261 cursor_dur_.set_plet (2, 3);
263 else if (cursor_dur_.plet_b ()
264 && (cursor_dur_.plet_.iso_i_ == 2)
265 && (cursor_dur_.plet_.type_i_ == 3))
267 assert (!cursor_dur_.dots_i_);
268 cursor_dur_.set_plet (1, 1);
269 cursor_dur_.durlog_i_ += 1;
270 cursor_dur_.dots_i_ = 1;
272 else if (cursor_dur_.dots_i_ == 1)
274 assert (!cursor_dur_.plet_b ());
275 cursor_dur_.dots_i_ = 0;
276 cursor_dur_.durlog_i_ -= 1;
279 if (Duration_convert::no_triplets_b_s
280 && cursor_dur_.plet_b () && ok ())
282 if (Duration_convert::no_double_dots_b_s
283 && (cursor_dur_.dots_i_ == 2) && ok ())
285 if (Duration_convert::no_smaller_than_i_s
286 && (cursor_dur_.durlog_i_ > Duration_convert::no_smaller_than_i_s) && ok ())
288 if (Duration_convert::no_smaller_than_i_s
289 && cursor_dur_.dots_i_
290 && (cursor_dur_.durlog_i_ >= Duration_convert::no_smaller_than_i_s)
293 if (Duration_convert::no_smaller_than_i_s
294 && (cursor_dur_.dots_i_ == 2)
295 && (cursor_dur_.durlog_i_ >= Duration_convert::no_smaller_than_i_s / 2)
303 Duration_iterator::ok ()
305 return (cursor_dur_.durlog_i_
306 && !((cursor_dur_.durlog_i_ == 0) && (cursor_dur_.dots_i_ > 2)));