source file of the GNU LilyPond music typesetter
- (c) 1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2008 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
-#include "debug.hh"
#include "timing-translator.hh"
-#include "command-request.hh"
+
+#include "warn.hh"
#include "translator-group.hh"
-#include "global-translator.hh"
+#include "global-context.hh"
#include "multi-measure-rest.hh"
-bool
-Timing_translator::do_try_music (Music*r)
-{
- if (Timing_req *t = dynamic_cast <Timing_req *> (r))
- {
- for (int i=0; i < timing_req_l_arr_.size (); i++)
- {
- if (timing_req_l_arr_[i]->equal_b(t))
- return true;
- if (String (classname (timing_req_l_arr_[i])) == classname (r))
- {
- r->warning (_ ("conflicting timing request"));
- return false;
- }
- }
-
- timing_req_l_arr_.push(t);
- return true;
- }
- return false;
-}
-
-/*ugh.
- */
-Time_signature_change_req*
-Timing_translator::time_signature_req_l() const
-{
- Time_signature_change_req *m_l=0;
- for (int i=0; !m_l && i < timing_req_l_arr_.size (); i++)
- {
- m_l=dynamic_cast<Time_signature_change_req*> (timing_req_l_arr_[i]);
- }
- return m_l;
-}
-
void
-Timing_translator::do_process_requests()
+Timing_translator::stop_translation_timestep ()
{
- for (int i=0; i < timing_req_l_arr_.size (); i++)
+ Global_context *global = get_global_context ();
+
+ if (to_boolean (get_property ("timing"))
+ && !to_boolean (get_property ("skipBars")))
{
- Timing_req * tr_l = timing_req_l_arr_[i];
+ Moment barleft = (measure_length () - measure_position (context ()));
+ Moment now = now_mom ();
- if (Time_signature_change_req *m_l = dynamic_cast <Time_signature_change_req *> (tr_l))
- {
- int b_i= m_l->beats_i_;
- int o_i = m_l->one_beat_i_;
- set_time_signature (b_i, o_i);
- }
- else if (dynamic_cast <Barcheck_req *> (tr_l))
+ if (barleft > Moment (0))
{
- if (measure_position ())
- {
- tr_l ->warning (_f ("barcheck failed at: %s",
- measure_position ().str ()));
- // resync
- daddy_trans_l_->set_property("measurePosition",
- (new Moment)->smobify_self ());
-
- }
+ Moment nextmom = now + barleft;
+ nextmom.grace_part_ = Rational (0);
+ global->add_moment_to_process (nextmom);
}
}
}
-
void
-Timing_translator::do_pre_move_processing()
+Timing_translator::initialize ()
{
- timing_req_l_arr_.set_size (0);
- Translator *t = this;
- Global_translator *global_l =0;
- do
- {
- t = t->daddy_trans_l_ ;
- global_l = dynamic_cast<Global_translator*> (t);
- }
- while (!global_l);
-
- /* allbars == ! skipbars */
- SCM sb = get_property ("skipBars", 0);
- bool allbars = !(gh_boolean_p (sb)&&gh_scm2bool (sb));
-
- // urg: multi bar rests: should always process whole of first bar?
- SCM tim = get_property ("timing", 0);
- bool timb = to_boolean (tim);
- if (timb && allbars)
- {
- Moment barleft = (measure_length () - measure_position ());
-
- if (barleft < Moment (0))
- barleft = 0;
-
- global_l->add_moment_to_process (now_mom () + barleft);
- }
+ context ()->add_alias (ly_symbol2scm ("Timing"));
+ context ()->set_property ("currentBarNumber", scm_from_int (1));
+ context ()->set_property ("internalBarNumber", scm_from_int (1));
+
+ context ()->set_property ("timeSignatureFraction",
+ scm_cons (scm_from_int (4), scm_from_int (4)));
+ /*
+ Do not init measurePosition; this should be done from global
+ context.
+ */
+ context ()->set_property ("measureLength",
+ Moment (Rational (1)).smobbed_copy ());
+ context ()->set_property ("beatLength",
+ Moment (Rational (1, 4)).smobbed_copy ());
}
-
-ADD_THIS_TRANSLATOR(Timing_translator);
-
-void
-Timing_translator::do_creation_processing()
-{
- daddy_trans_l_->set_property ("timing" , SCM_BOOL_T);
- daddy_trans_l_->set_property ("currentBarNumber" , gh_int2scm (1));
- daddy_trans_l_->set_property("measurePosition",
- (new Moment)->smobify_self());
- daddy_trans_l_->set_property ("oneBeat",
- (new Moment (1,4))->smobify_self ());
- daddy_trans_l_->set_property("measureLength",
- (new Moment (1))->smobify_self());
-}
-
-Moment
+Rational
Timing_translator::measure_length () const
{
- SCM l = get_property("measureLength",0);
- if (SMOB_IS_TYPE_B(Moment, l))
- return *SMOB_TO_TYPE (Moment, l);
+ SCM l = get_property ("measureLength");
+ if (unsmob_moment (l))
+ return unsmob_moment (l)->main_part_;
else
- return Moment (1);
+ return Rational (1);
}
-
-void
-Timing_translator::get_time_signature (int *n, int *d) const
+Timing_translator::Timing_translator ()
{
- Moment one_beat (1,4);
- SCM one = get_property ("beatLength",0);
- if (SMOB_IS_TYPE_B (Moment, one))
- one_beat = *SMOB_TO_TYPE (Moment, one);
- *n = measure_length () / one_beat;
- *d = one_beat.den_i ();
}
-
void
-Timing_translator::set_time_signature (int l, int o)
+Timing_translator::start_translation_timestep ()
{
- Moment one_beat = Moment (1)/Moment (o);
- Moment len = Moment (l) * one_beat;
- daddy_trans_l_->set_property ("measureLength",
- (new Moment (len))->smobify_self ());
- daddy_trans_l_->set_property ("beatength",
- (new Moment (one_beat))->smobify_self ());
-}
-
-Timing_translator::Timing_translator()
-{
-}
+ Global_context *global = get_global_context ();
-
-Moment
-Timing_translator::measure_position () const
-{
- SCM sm = get_property ("measurePosition",0);
-
- Moment m =0;
- if (SMOB_IS_TYPE_B (Moment, sm))
- {
- m = *SMOB_TO_TYPE (Moment, sm);
- while (m < Moment (0))
- m += measure_length ();
- }
-
- return m;
-}
-
-void
-Timing_translator::do_post_move_processing()
-{
- Translator *t = this;
- Global_translator *global_l =0;
- do
+ Moment now = global->now_mom ();
+ Moment dt = now - global->previous_moment ();
+ if (dt < Moment (0))
{
- t = t->daddy_trans_l_ ;
- global_l = dynamic_cast<Global_translator*> (t);
+ programming_error ("moving backwards in time");
+ dt = 0;
}
- while (!global_l);
-
- Moment dt = global_l->now_mom_ - global_l -> prev_mom_;
- if (dt < Moment (0))
+ else if (dt.main_part_.is_infinity ())
{
- programming_error ("Moving backwards in time");
+ programming_error ("moving infinitely to future");
dt = 0;
}
-
- if (!dt)
+
+ if (!dt.to_bool ())
return;
- Moment * measposp =0;
+ Moment measposp;
- SCM s = get_property ("measurePosition", 0);
- if (SMOB_IS_TYPE_B (Moment, s))
- {
- measposp = SMOB_TO_TYPE (Moment,s);
- }
+ SCM s = get_property ("measurePosition");
+ if (unsmob_moment (s))
+ measposp = *unsmob_moment (s);
else
{
- measposp = new Moment;
- daddy_trans_l_->set_property ("measurePosition", measposp->smobify_self ());
- }
-
- *measposp += dt;
- // don't need to set_property
-
- Translator_group * tr =daddy_trans_l_;
- SCM barn = get_property ("currentBarNumber", &tr);
- int b = 0;
- if (gh_number_p(barn))
- {
- b = gh_scm2int (barn);
+ measposp = now;
+ context ()->set_property ("measurePosition",
+ measposp.smobbed_copy ());
}
- SCM cad = get_property ("timing", 0);
- bool c= to_boolean (cad );
+ measposp += dt;
+
+ int current_barnumber = robust_scm2int (get_property ("currentBarNumber"), 0);
+ int internal_barnumber = robust_scm2int (get_property ("internalBarNumber"), 0);
- Moment len = measure_length ();
- while (c && *measposp >= len)
- {
- *measposp -= len;
- b ++;
- }
+ SCM cad = get_property ("timing");
+ bool c = to_boolean (cad);
+
+ Rational len = measure_length ();
+ while (c && measposp.main_part_ >= len)
+ {
+ measposp.main_part_ -= len;
+ current_barnumber ++;
+ internal_barnumber ++;
+ }
- tr->set_property ("currentBarNumber", gh_int2scm (b));
+ context ()->set_property ("currentBarNumber", scm_from_int (current_barnumber));
+ context ()->set_property ("internalBarNumber", scm_from_int (internal_barnumber));
+ context ()->set_property ("measurePosition", measposp.smobbed_copy ());
}
+#include "translator.icc"
+
+ADD_TRANSLATOR (Timing_translator,
+ /* doc */
+ "This engraver adds the alias @code{Timing} to its containing"
+ " context. Responsible for synchronizing timing information"
+ " from staves. Normally in @code{Score}. In order to create"
+ " polyrhythmic music, this engraver should be removed from"
+ " @code{Score} and placed in @code{Staff}.",
+
+ /* create */
+ "",
+
+ /* read */
+ "internalBarNumber "
+ "currentBarNumber "
+ "measureLength "
+ "measurePosition ",
+
+ /* write */
+ "internalBarNumber "
+ "currentBarNumber "
+ "measurePosition "
+ );
projects / lilypond.git / blobdiff