source file of the GNU LilyPond music typesetter
- (c) 1997--2001 Jan Nieuwenhuizen <janneke@gnu.org>
+ (c) 1997--2002 Jan Nieuwenhuizen <janneke@gnu.org>
*/
#include <math.h>
#include "debug.hh"
#include "scope.hh"
-Midi_def::Midi_def()
+Midi_def::Midi_def ()
{
// ugh
- set_tempo (Moment (1, 4), 60);
+ set_tempo (Moment (Rational (1, 4)), 60);
}
int
Midi_def::get_tempo_i (Moment one_beat_mom)
{
- Moment w = *unsmob_moment (scope_p_->scm_elem ("whole-in-seconds"));
- Moment wholes_per_min = Moment(60) /w;
- int beats_per_min = wholes_per_min / one_beat_mom;
+ SCM wis = ly_symbol2scm ("whole-in-seconds");
+ Moment *w = unsmob_moment (scope_p_->scm_elem (wis));
+
+ Moment wholes_per_min = Moment (60);
+ if (!w)
+ {
+ programming_error ("wholes-in-seconds not set.");
+ wholes_per_min /= 4;
+ }
+ else
+ {
+ wholes_per_min /= *w;
+ }
+
+ int beats_per_min = int ((wholes_per_min / one_beat_mom).main_part_);
return int (beats_per_min);
}
{
Moment beats_per_second = Moment (beats_per_minute_i) / Moment (60);
- Moment m = Moment(1)/Moment(beats_per_second * one_beat_mom);
- scope_p_->set ("whole-in-seconds", m.smobbed_copy());
+ Moment m = Moment (1)/Moment (beats_per_second * one_beat_mom);
+ scope_p_->set ("whole-in-seconds", m.smobbed_copy ());
}