/*
- midi-def.cc -- implement Midi_def
+ midi-def.cc -- implement midi output def functions
source file of the GNU LilyPond music typesetter
- (c) 1997--1998 Jan Nieuwenhuizen <janneke@gnu.org>
-
+ (c) 1997--2006 Jan Nieuwenhuizen <janneke@gnu.org>
*/
-#include <math.h>
-#include "misc.hh"
-#include "midi-def.hh"
-#include "translator.hh"
-#include "performance.hh"
-#include "assoc-iter.hh"
-#include "score-performer.hh"
-#include "debug.hh"
-
-// classes, alphasorted
-// statics
-// constructors
-// destructor
-// routines, alphasorted
-
-Midi_def::Midi_def()
-{
- // ugh
- set_tempo (Moment (1, 4), 60);
-}
-Midi_def::~Midi_def()
-{
-}
-
-Real
-Midi_def::duration_to_seconds_f (Moment mom)
-{
- if (!mom)
- return 0;
-
- return Moment (whole_in_seconds_mom_) * mom;
-}
+#include "misc.hh"
+#include "output-def.hh"
+#include "moment.hh"
+#include "warn.hh"
+#include "scm-hash.hh"
int
-Midi_def::get_tempo_i (Moment one_beat_mom)
+get_tempo (Output_def *def,
+ Moment one_beat_mom)
{
- Moment wholes_per_min = Moment(60) /Moment(whole_in_seconds_mom_);
- int beats_per_min = wholes_per_min / one_beat_mom;
- return int (beats_per_min);
+ SCM wis = ly_symbol2scm ("whole-in-seconds");
+ Moment *w = unsmob_moment (def->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;
+
+ Rational beats_per_min = (wholes_per_min / one_beat_mom).main_part_;
+ return beats_per_min.to_int ();
}
void
-Midi_def::set_tempo (Moment one_beat_mom, int beats_per_minute_i)
+set_tempo (Output_def *def,
+ Moment one_beat_mom,
+ int beats_per_minute_i)
{
Moment beats_per_second = Moment (beats_per_minute_i) / Moment (60);
- whole_in_seconds_mom_ = Moment(1)/Moment(beats_per_second * one_beat_mom);
-}
-void
-Midi_def::print() const
-{
-#ifndef NPRINT
- Music_output_def::print ();
- DOUT << "Midi {";
- DOUT << "4/min: " << Moment (60) / (whole_in_seconds_mom_ * Moment (4));
- DOUT << "}\n";
-#endif
+ Moment m = Moment (1) / Moment (beats_per_second * one_beat_mom);
+ def->set_variable (ly_symbol2scm ("whole-in-seconds"), m.smobbed_copy ());
}
-
-IMPLEMENT_IS_TYPE_B1(Midi_def, Music_output_def);
-
-int Midi_def::default_count_i_=0;
-int
-Midi_def::get_next_default_count () const
-{
- return default_count_i_++;
-}