source file of the GNU LilyPond music typesetter
- (c) 1997 Jan Nieuwenhuizen <jan@digicash.com>
+ (c) 1997--2004 Jan Nieuwenhuizen <janneke@gnu.org>
*/
#include <math.h>
#include "misc.hh"
#include "midi-def.hh"
-#include "input-translator.hh"
-#include "performer-group-performer.hh"
-#include "assoc-iter.hh"
+#include "performance.hh"
+#include "warn.hh"
+#include "scm-hash.hh"
-#include "debug.hh"
-
-// classes, alphasorted
-// statics
-// constructors
-// destructor
-// routines, alphasorted
-
-// statics Midi_def
-// ugh
-
-int Midi_def::den_i_s = 4;
-int Midi_def::num_i_s = 4;
-
-Midi_def::Midi_def()
-{
- outfile_str_ = "";
- itrans_p_ = 0;
- // ugh
- set_tempo (Moment (1, 4), 60 );
-}
-
-Midi_def::Midi_def (Midi_def const& s)
-{
- whole_seconds_f_ = s.whole_seconds_f_;
- itrans_p_ = s.itrans_p_ ? new Input_translator (*s.itrans_p_) : 0;
- outfile_str_ = s.outfile_str_;
-}
-
-Midi_def::~Midi_def()
-{
- delete itrans_p_;
-}
-
-Real
-Midi_def::duration_to_seconds_f (Moment mom)
-{
- if ( !mom)
- return 0;
-
- return Moment (whole_seconds_f_) * mom;
-}
-
-Global_translator*
-Midi_def::get_global_translator_p() const
+Midi_def::Midi_def ()
{
- return itrans_p_->get_group_performer_p()->global_l ();
+ // ugh
+ set_tempo (Moment (Rational (1, 4)), 60);
}
int
-Midi_def::get_tempo_i (Moment moment)
-{
- return Moment (whole_seconds_f_) * Moment (60 ) * moment;
-}
-
-void
-Midi_def::print() const
-{
-#ifndef NPRINT
- DOUT << "Midi {";
- DOUT << "4/min: " << Real (60) / ( whole_seconds_f_ * 4 );
- DOUT << "out: " << outfile_str_;
- DOUT << "}\n";
-#endif
+Midi_def::get_tempo (Moment one_beat_mom)
+{
+ SCM wis = ly_symbol2scm ("whole-in-seconds");
+ Moment *w = unsmob_moment (lookup_variable (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);
}
void
-Midi_def::set (Input_translator* itrans_p)
+Midi_def::set_tempo (Moment one_beat_mom, int beats_per_minute_i)
{
- delete itrans_p_;
- itrans_p_ = itrans_p;
-}
+ Moment beats_per_second = Moment (beats_per_minute_i) / Moment (60);
-void
-Midi_def::set_tempo (Moment moment, int count_per_minute_i)
-{
- whole_seconds_f_ = Moment (count_per_minute_i) / Moment (60 ) / moment;
+ Moment m = Moment (1)/Moment (beats_per_second * one_beat_mom);
+ set_variable (ly_symbol2scm ("whole-in-seconds"), m.smobbed_copy ());
}