2 duration-convert.cc -- implement
4 source file of the LilyPond music typesetter
6 (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
9 #include "duration-convert.hh"
12 // statics Duration_convert
13 bool const Duration_convert::midi_as_plet_b_s = true;
14 bool Duration_convert::no_quantify_b_s = false;
15 bool Duration_convert::no_double_dots_b_s = false;
16 bool Duration_convert::no_triplets_b_s = false;
17 int Duration_convert::no_smaller_than_i_s = 0;
20 Duration_convert::dur2_str( Duration dur )
23 return String( "[" ) + String( dur.ticks_i_ ) + "]";
25 String str( dur.type_i_ );
26 str += String( '.', dur.dots_i_ );
28 str += String( "*" ) + String( dur.plet_.iso_i_ )
29 + String( "/" ) + String( dur.plet_.type_i_ );
35 Duration_convert::dur2_i( Duration dur, int division_1_i )
37 return dur2_mom( dur ) * Moment( division_1_i );
42 Duration_convert::dur2ticks_i( Duration dur )
46 return dur2_mom( dur ) * Moment( Duration::division_1_i_s );
50 Duration_convert::dur2_mom( Duration dur )
53 return Moment( dur.ticks_i_, Duration::division_1_i_s );
59 Moment mom = Moment( 1 , dur.type_i_ );
62 while ( dur.dots_i_-- ) {
67 return mom * plet_factor_mom( dur );
72 Duration_convert::i2_mom( int time_i, int division_1_i )
77 if ( division_1_i > 0 )
78 return Moment( time_i, division_1_i );
80 return Moment( -division_1_i, time_i );
85 Duration_convert::mom2_dur( Moment mom )
88 but filling an array using Duration_iterator
89 might speed things up, a little
91 Duration_iterator iter_dur;
94 Duration dur = iter_dur++;
95 if ( mom == dur2_mom( dur ) )
98 if ( midi_as_plet_b_s ) {
99 Moment mom_4 = mom / Moment( 4 );
100 long num = mom_4.numerator().as_long();
101 long den = mom_4.denominator().as_long();
102 Duration dur( 4, 0 );
103 dur.set_plet( num, den );
113 Duration_convert::mom2standardised_dur( Moment mom )
116 but filling an array using Duration_iterator
117 might speed things up, a little
119 Duration_iterator iter_dur;
122 Duration lower_dur = iter_dur++;
123 Duration upper_dur( 0 );
125 upper_dur = iter_dur();
126 Moment lower_mom = dur2_mom( lower_dur );
127 Moment upper_mom = dur2_mom( upper_dur );
128 if ( mom < lower_mom )
130 if ( mom == lower_mom )
138 Duration_convert::plet_factor_mom( Duration dur )
140 return dur.plet_.mom();
144 Duration_convert::sync_f( Duration dur, Moment mom )
146 return mom / dur2_mom( dur );
150 Duration_convert::ticks2_dur( int ticks_i )
153 but filling an array using Duration_iterator
154 might speed things up, a little
156 // should use mom2_dur
157 Moment mom( ticks_i, Duration::division_1_i_s );
158 Duration_iterator iter_dur;
161 Duration dur = iter_dur++;
162 if ( mom == dur2_mom( dur ) )
165 if ( midi_as_plet_b_s ) {
166 Duration dur( 4, 0 );
167 dur.set_plet( ticks_i, Duration::division_1_i_s / 4 );
171 dur.set_ticks( ticks_i );
176 Duration_convert::ticks2standardised_dur( int ticks_i )
179 but filling an array using Duration_iterator
180 might speed things up, a little
182 // should use mom2standardised_dur
183 Moment mom( ticks_i, Duration::division_1_i_s );
184 Duration_iterator iter_dur;
187 Duration lower_dur = iter_dur++;
188 // Duration upper_dur( 0 );
189 Duration upper_dur( 1, 1 );
191 upper_dur = iter_dur();
192 Moment lower_mom = dur2_mom( lower_dur );
193 Moment upper_mom = dur2_mom( upper_dur );
194 if ( mom < lower_mom )
196 if ( mom == lower_mom )
198 if ( mom == upper_mom ) // don-t miss last (sic)
200 if ( ( mom >= lower_mom ) && ( mom <= upper_mom ) ) {
201 warning( String( "duration not exact: " ) + String( (Real)mom ) );
202 if ( abs( mom - lower_mom ) < abs( mom - upper_mom ) )
207 lower_dur = upper_dur;
212 Duration_iterator::Duration_iterator()
214 cursor_dur_.type_i_ = 128;
215 if ( Duration_convert::no_smaller_than_i_s )
216 cursor_dur_.type_i_ = Duration_convert::no_smaller_than_i_s;
217 // cursor_dur_.set_plet( 1, 1 );
221 Duration_iterator::operator ++(int)
223 return forward_dur();
227 Duration_iterator::operator ()()
232 Duration_iterator::operator bool()
238 Duration_iterator::dur()
244 Duration_iterator::forward_dur()
246 /* should do smart table? guessing:
260 Duration dur = cursor_dur_;
262 if ( !cursor_dur_.dots_i_ && !cursor_dur_.plet_b() ) {
263 cursor_dur_.type_i_ *= 2;
264 cursor_dur_.dots_i_ = 2;
266 else if ( cursor_dur_.dots_i_ == 2 ) {
267 assert( !cursor_dur_.plet_b() );
268 cursor_dur_.dots_i_ = 0;
269 cursor_dur_.type_i_ /= 4;
270 cursor_dur_.set_plet( 2, 3 );
272 else if ( cursor_dur_.plet_b()
273 && ( cursor_dur_.plet_.iso_i_ == 2 )
274 && ( cursor_dur_.plet_.type_i_ == 3 ) ) {
275 assert( !cursor_dur_.dots_i_ );
276 cursor_dur_.set_plet( 1, 1 );
277 cursor_dur_.type_i_ *= 2;
278 cursor_dur_.dots_i_ = 1;
280 else if ( cursor_dur_.dots_i_ == 1 ) {
281 assert( !cursor_dur_.plet_b() );
282 cursor_dur_.dots_i_ = 0;
283 cursor_dur_.type_i_ /= 2;
286 if ( Duration_convert::no_triplets_b_s
287 && cursor_dur_.plet_b() && ok() )
289 if ( Duration_convert::no_double_dots_b_s
290 && ( cursor_dur_.dots_i_ == 2 ) && ok() )
292 if ( Duration_convert::no_smaller_than_i_s
293 && ( cursor_dur_.type_i_ > Duration_convert::no_smaller_than_i_s ) && ok() )
295 if ( Duration_convert::no_smaller_than_i_s
296 && cursor_dur_.dots_i_
297 && ( cursor_dur_.type_i_ >= Duration_convert::no_smaller_than_i_s )
300 if ( Duration_convert::no_smaller_than_i_s
301 && ( cursor_dur_.dots_i_ == 2 )
302 && ( cursor_dur_.type_i_ >= Duration_convert::no_smaller_than_i_s / 2 )
310 Duration_iterator::ok()
312 return ( cursor_dur_.type_i_
313 && !( ( cursor_dur_.type_i_ == 1 ) && ( cursor_dur_.dots_i_ > 2 ) ) );