2 duration-convert.cc -- implement Duration_convert
4 source file of the LilyPond music typesetter
6 (c) 1997--1998 Han-Wen Nienhuys <hanwen@stack.nl>
7 Jan Nieuwenhuizen <jan@digicash.com>
10 #include "duration-convert.hh"
11 #include "duration-iter.hh"
14 // statics Duration_convert
15 bool const Duration_convert::midi_as_plet_b_s = true;
16 bool Duration_convert::no_quantify_b_s = false;
17 bool Duration_convert::no_double_dots_b_s = false;
18 bool Duration_convert::no_triplets_b_s = false;
19 int Duration_convert::no_smaller_than_i_s = 0;
20 Array<Duration> Duration_convert::dur_array_s;
23 Duration_convert::dur2_str (Duration dur)
26 return String ("[") + String (dur.ticks_i_) + "]";
29 if (dur.durlog_i_ >= 0)
30 str = String ( type2_i (dur.durlog_i_) );
31 else if (dur.durlog_i_ == -1)
33 else if (dur.durlog_i_ == -2)
35 str += String ('.', dur.dots_i_);
37 str += String ("*") + String (dur.plet_.iso_i_)
38 + String ("/") + String (dur.plet_.type_i_);
43 Duration_convert::dur2ticks_i (Duration dur)
47 return dur2_mom (dur) * Moment (Duration::division_1_i_s);
52 Duration_convert::i2_type (int i)
63 Duration_convert::type2_i (int type)
72 Duration_convert::dur2_mom (Duration dur)
75 return Moment (dur.ticks_i_, Duration::division_1_i_s);
78 if (dur.durlog_i_<-10)
82 mom = Moment (type2_i (-dur.durlog_i_), 1);
84 mom = Moment (1 , type2_i (dur.durlog_i_));
93 return mom * plet_factor_mom (dur);
97 Duration_convert::mom2_dur (Moment mom)
107 Duration dur = mom2standardised_dur (mom);
108 // if (!dur.mom () || (dur.mom () == mom))
109 if (!dur.length () || (dur.length () == mom))
111 assert (midi_as_plet_b_s);
113 // dur.set_plet (type_mom, Duration::division_1_i_s / 4);
115 // Moment as_plet_mom = mom / dur.mom ();
116 Moment as_plet_mom = mom / dur.length ();
117 as_plet_mom *= dur.plet_.mom ();
118 long num = as_plet_mom.num ();
119 long den = as_plet_mom.den ();
120 dur.set_plet (num, den);
125 Duration_convert::mom2standardised_dur (Moment mom)
127 // if (!dur_array_s.length_i ())
128 if (!dur_array_s.size ())
130 assert (dur_array_s.size ());
131 for (int i = 0; i < dur_array_s.size () - 1; i++)
133 Moment lower_mom = dur2_mom (dur_array_s[ i ]);
134 if (mom <= lower_mom)
136 // all arbitrary, but 3/4 will get rid of the noise...
138 if (i || (mom / lower_mom > Moment (3, 4)))
139 return dur_array_s[ i ];
147 Moment upper_mom = dur2_mom (dur_array_s[ i + 1 ]);
148 if ((mom < upper_mom)
149 && ((mom - lower_mom) / lower_mom
150 < (upper_mom - mom) / upper_mom))
151 return dur_array_s[ i ];
153 return dur_array_s[ dur_array_s.size () - 1 ];
157 Duration_convert::set_array ()
159 dur_array_s.clear ();
161 Duration_iterator iter_dur;
164 dur_array_s.push (iter_dur++);
169 Duration_convert::plet_factor_mom (Duration dur)
171 return dur.plet_.mom ();
175 Duration_convert::sync_f (Duration dur, Moment mom)
177 return mom / dur2_mom (dur);
181 Duration_convert::ticks2_dur (int ticks_i)
183 Moment mom (ticks_i, Duration::division_1_i_s);
184 if (midi_as_plet_b_s)
185 return mom2_dur (mom);
187 Duration dur = mom2standardised_dur (mom);
189 if (dur.length () == mom)
192 return mom2_dur (mom);
196 Duration_convert::ticks2standardised_dur (int ticks_i)
198 Moment mom (ticks_i, Duration::division_1_i_s);
199 Duration dur = mom2standardised_dur (mom);