/*
- timing-translator.cc -- implement Timing_translator
+ This file is part of LilyPond, the GNU music typesetter.
+ Copyright (C) 1997--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
- source file of the GNU LilyPond music typesetter
+ LilyPond is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
- (c) 1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ LilyPond is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
*/
-#include "debug.hh"
#include "timing-translator.hh"
-#include "command-request.hh"
+
+#include "warn.hh"
#include "translator-group.hh"
-#include "global-translator.hh"
-#include "multi-measure-rest.hh"
+#include "global-context.hh"
+#include "moment.hh"
-bool
-Timing_translator::do_try_music (Music*r)
+void
+Timing_translator::stop_translation_timestep ()
{
- 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;
-}
+ Global_context *global = get_global_context ();
-/*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++)
+ if (to_boolean (get_property ("timing"))
+ && !to_boolean (get_property ("skipBars")))
{
- m_l=dynamic_cast<Time_signature_change_req*> (timing_req_l_arr_[i]);
+ Moment barleft = (measure_length () - measure_position (context ()));
+ Moment now = now_mom ();
+
+ if (barleft > Moment (0))
+ {
+ Moment nextmom = now + barleft;
+ nextmom.grace_part_ = Rational (0);
+ global->add_moment_to_process (nextmom);
+ }
}
- return m_l;
}
void
-Timing_translator::do_process_requests()
+Timing_translator::initialize ()
{
- for (int i=0; i < timing_req_l_arr_.size (); i++)
+ Context *timing = Context::unsmob (scm_call_2 (ly_lily_module_constant ("ly:context-find"),
+ context ()->self_scm (),
+ ly_symbol2scm ("Timing")));
+ if (timing != context ())
{
- Timing_req * tr_l = timing_req_l_arr_[i];
-
- 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 (measure_position ())
- {
- tr_l ->warning (_f ("barcheck failed at: %s",
- measure_position ().str ()));
- // resync
- daddy_trans_l_->set_property("measurePosition",
- (new Moment)->smobify_self ());
-
-
- }
- }
- }
+ context ()->add_alias (ly_symbol2scm ("Timing"));
+ if (!timing)
+ {
+ programming_error ("Can't find Timing context template");
+ timing = context ();
+ }
+ }
-}
+ SCM barnumber = timing->get_property ("currentBarNumber");
+ if (!scm_is_integer (barnumber))
+ barnumber = scm_from_int (1);
+ context ()->set_property ("currentBarNumber", barnumber);
+ context ()->set_property ("internalBarNumber", barnumber);
+ SCM timeSignatureFraction = timing->get_property ("timeSignatureFraction");
-void
-Timing_translator::do_pre_move_processing()
-{
- timing_req_l_arr_.set_size (0);
- Translator *t = this;
- Global_translator *global_l =0;
- do
+ if (!scm_is_pair (timeSignatureFraction))
{
- t = t->daddy_trans_l_ ;
- global_l = dynamic_cast<Global_translator*> (t);
+ programming_error ("missing timeSignatureFraction");
+ timeSignatureFraction = scm_cons (scm_from_int (4), scm_from_int (4));
}
- while (!global_l);
+ context ()->set_property ("timeSignatureFraction", timeSignatureFraction);
- /* allbars == ! skipbars */
- SCM sb = get_property ("skipBars", 0);
- bool allbars = !(gh_boolean_p (sb)&&gh_scm2bool (sb));
+ SCM measureLength = timing->get_property ("measureLength");
- // urg: multi bar rests: should always process whole of first bar?
- SCM tim = get_property ("timing", 0);
- bool timb = gh_boolean_p (tim) && gh_scm2bool ( tim);
+ if (!Moment::is_smob (measureLength))
+ {
+ measureLength =
+ Moment (ly_scm2rational
+ (scm_divide (scm_car (timeSignatureFraction),
+ scm_cdr (timeSignatureFraction)))).smobbed_copy ();
+ }
+ context ()->set_property ("measureLength", measureLength);
+ /*
+ Do not init measurePosition; this should be done from global
+ context.
+ */
- if (timb && allbars)
+ SCM timeSignatureSettings = timing->get_property ("timeSignatureSettings");
+ if (!scm_is_pair (timeSignatureSettings))
{
- Moment barleft = (measure_length () - measure_position ());
+ programming_error ("missing timeSignatureSettings");
+ // A memoized constant is not the prettiest thing as a fallback
+ // since it does not track changes of the variable. However,
+ // this is still better than nothing, and we already complained
+ // via a programming_error
+ timeSignatureSettings = ly_lily_module_constant ("default-time-signature-settings");
+ }
+ context ()->set_property ("timeSignatureSettings", timeSignatureSettings);
- if (barleft < Moment (0))
- barleft = 0;
+ SCM beamExceptions = timing->get_property ("beamExceptions");
+ if (!scm_is_pair (beamExceptions))
+ {
+ beamExceptions =
+ scm_call_2 (ly_lily_module_constant ("beam-exceptions"),
+ timeSignatureFraction,
+ timeSignatureSettings);
+ }
+ context ()->set_property ("beamExceptions", beamExceptions);
- global_l->add_moment_to_process (now_mom () + barleft);
+ SCM baseMoment = timing->get_property ("baseMoment");
+ if (!Moment::is_smob (baseMoment))
+ {
+ baseMoment =
+ Moment (ly_scm2rational
+ (scm_call_2 (ly_lily_module_constant ("base-length"),
+ timeSignatureFraction,
+ timeSignatureSettings))).smobbed_copy ();
}
-}
+ context ()->set_property ("baseMoment", baseMoment);
+ SCM beatStructure = timing->get_property ("beatStructure");
+ if (!scm_is_pair (beatStructure))
+ {
+ beatStructure =
+ scm_call_3 (ly_lily_module_constant ("beat-structure"),
+ ly_rational2scm (Moment::unsmob (baseMoment)->main_part_),
+ timeSignatureFraction,
+ timeSignatureSettings);
+ }
+ context ()->set_property ("beatStructure", beatStructure);
-ADD_THIS_TRANSLATOR(Timing_translator);
+ context ()->set_property ("beamHalfMeasure",
+ timing->get_property ("beamHalfMeasure"));
-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("measureLength",
- (new Moment (1))->smobify_self());
-
+ context ()->set_property ("autoBeaming",
+ timing->get_property ("autoBeaming"));
}
-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 (Moment::is_smob (l))
+ return Moment::unsmob (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 ()
{
- *n = measure_length () / one_beat_;
- *d = one_beat_.den_i ();
}
-
void
-Timing_translator::set_time_signature (int l, int o)
-{
- one_beat_ = Moment (1)/Moment (o);
- Moment len = Moment (l) * one_beat_;
- daddy_trans_l_->set_property ("measureLength",
- (new Moment (len))->smobify_self ());
-}
-
-Timing_translator::Timing_translator()
+Timing_translator::start_translation_timestep ()
{
- one_beat_ = Moment( 1,4);
-}
-
+ 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))
+ Moment now = global->now_mom ();
+ Moment dt = now - global->previous_moment ();
+ if (dt < Moment (0))
{
- m = *SMOB_TO_TYPE (Moment, sm);
- while (m < Moment (0))
- m += measure_length ();
+ programming_error ("moving backwards in time");
+ dt = 0;
}
-
- return m;
-}
-
-void
-Timing_translator::do_post_move_processing()
-{
- Translator *t = this;
- Global_translator *global_l =0;
- do
+ else if (dt.main_part_.is_infinity ())
{
- t = t->daddy_trans_l_ ;
- global_l = dynamic_cast<Global_translator*> (t);
- }
- while (!global_l);
-
- Moment dt = global_l->now_mom_ - global_l -> prev_mom_;
- if (dt < Moment (0))
- {
- 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 (Moment::is_smob (s))
+ measposp = *Moment::unsmob (s);
else
{
- measposp = new Moment;
- daddy_trans_l_->set_property ("measurePosition", measposp->smobify_self ());
+ measposp = now;
}
-
- *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))
+
+ int current_barnumber = robust_scm2int (get_property ("currentBarNumber"), 0);
+ int internal_barnumber = robust_scm2int (get_property ("internalBarNumber"), 0);
+
+ SCM cad = get_property ("timing");
+ bool c = to_boolean (cad);
+
+ if (c)
{
- b = gh_scm2int (barn);
- }
+ Rational len = measure_length ();
- SCM cad = get_property ("timing", 0);
- bool c= gh_boolean_p (cad ) && gh_scm2bool (cad);
+ measposp += dt;
- Moment len = measure_length ();
- while (c && *measposp >= len)
- {
- *measposp -= len;
- b ++;
- }
+ while (measposp.main_part_ >= len)
+ {
+ measposp.main_part_ -= len;
+ current_barnumber++;
+ internal_barnumber++;
+ }
+ }
- tr->set_property ("currentBarNumber", gh_int2scm (b));
-}
+ // Because "timing" can be switched on and off asynchronously with
+ // graces, measurePosition might get into strange settings of
+ // grace_part_. It does not actually make sense to have it diverge
+ // from the main timing. Updating the grace part outside of the
+ // actual check for "timing" looks strange and will lead to changes
+ // of grace_part_ even when timing is off. However, when timing is
+ // switched back on again, this will generally happen in an override
+ // that does _not_ in itself advance current_moment. So the whole
+ // timing advance logic will only get triggered while "timing" is
+ // still of. Maybe we should keep measurePosition.grace_part_
+ // constantly at zero anyway?
+ measposp.grace_part_ = now.grace_part_;
-int
-Timing_translator::bars_i () const
-{
- return gh_scm2int (get_property ("currentBarNumber", 0));
+
+ 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 */
+ "baseMoment "
+ "currentBarNumber "
+ "internalBarNumber "
+ "measureLength "
+ "measurePosition "
+ "timeSignatureFraction ",
+
+ /* write */
+ "baseMoment "
+ "currentBarNumber "
+ "internalBarNumber "
+ "measureLength "
+ "measurePosition "
+ "timeSignatureFraction "
+ );