/*
- timing-translator.cc -- implement Timing_translator
+ This file is part of LilyPond, the GNU music typesetter.
+ Copyright (C) 1997--2014 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--2004 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 "warn.hh"
#include "timing-translator.hh"
+#include "warn.hh"
#include "translator-group.hh"
#include "global-context.hh"
-#include "multi-measure-rest.hh"
-
+#include "moment.hh"
void
Timing_translator::stop_translation_timestep ()
{
Global_context *global = get_global_context ();
- /* allbars == ! skipbars */
- SCM sb = get_property ("skipBars");
- bool allbars = !to_boolean (sb);
-
- // urg: multi bar rests: should always process whole of first bar?
- SCM tim = get_property ("timing");
- bool timb = to_boolean (tim);
- if (timb && allbars)
+ if (to_boolean (get_property ("timing"))
+ && !to_boolean (get_property ("skipBars")))
{
- Moment barleft = (measure_length () - measure_position ());
+ Moment barleft = (measure_length () - measure_position (context ()));
Moment now = now_mom ();
- if (barleft > Moment (0)
- /*
- Hmm. We insert the bar moment every time we process a
- moment. A waste of cpu?
- */
- && !now.grace_part_)
- global->add_moment_to_process (now + barleft);
+ if (barleft > Moment (0))
+ {
+ Moment nextmom = now + barleft;
+ nextmom.grace_part_ = Rational (0);
+ global->add_moment_to_process (nextmom);
+ }
}
}
void
Timing_translator::initialize ()
{
+ Context *timing = Context::unsmob (scm_call_2 (ly_lily_module_constant ("ly:context-find"),
+ context ()->self_scm (),
+ ly_symbol2scm ("Timing")));
+ if (timing != context ())
+ {
+ 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");
+
+ if (!scm_is_pair (timeSignatureFraction))
+ {
+ programming_error ("missing timeSignatureFraction");
+ timeSignatureFraction = scm_cons (scm_from_int (4), scm_from_int (4));
+ }
+ context ()->set_property ("timeSignatureFraction", timeSignatureFraction);
+
+ SCM measureLength = timing->get_property ("measureLength");
+
+ if (!Moment::unsmob (measureLength))
+ {
+ measureLength =
+ Moment (ly_scm2rational
+ (scm_divide (scm_car (timeSignatureFraction),
+ scm_cdr (timeSignatureFraction)))).smobbed_copy ();
+ }
+ context ()->set_property ("measureLength", measureLength);
- /*
- move this to engraver-init.ly?
- */
- daddy_context_->add_alias (ly_symbol2scm ("Timing"));
- daddy_context_->set_property ("timing" , SCM_BOOL_T);
- daddy_context_->set_property ("currentBarNumber" , scm_int2num (1));
-
- daddy_context_->set_property ("timeSignatureFraction",
- scm_cons (scm_int2num (4), scm_int2num (4)));
/*
Do not init measurePosition; this should be done from global
context.
- */
- daddy_context_->set_property ("measureLength", Moment (Rational (1)).smobbed_copy ());
- daddy_context_->set_property ("beatLength", Moment (Rational (1,4)).smobbed_copy ());
+ */
+
+ SCM timeSignatureSettings = timing->get_property ("timeSignatureSettings");
+ if (!scm_is_pair (timeSignatureSettings))
+ {
+ 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);
+
+ 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);
+
+ SCM baseMoment = timing->get_property ("baseMoment");
+ if (!Moment::unsmob (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);
+
+ context ()->set_property ("beamHalfMeasure",
+ timing->get_property ("beamHalfMeasure"));
+
+ context ()->set_property ("autoBeaming",
+ timing->get_property ("autoBeaming"));
}
Rational
Timing_translator::measure_length () const
{
SCM l = get_property ("measureLength");
- if (unsmob_moment (l))
- return unsmob_moment (l)->main_part_;
+ if (Moment::unsmob (l))
+ return Moment::unsmob (l)->main_part_;
else
return Rational (1);
}
Timing_translator::Timing_translator ()
{
-
-}
-
-Moment
-Timing_translator::measure_position () const
-{
- SCM sm = get_property ("measurePosition");
-
- Moment m =0;
- if (unsmob_moment (sm))
- {
- m = *unsmob_moment (sm);
- while (m.main_part_ < Rational (0))
- m.main_part_ += measure_length ();
- }
-
- return m;
}
void
Timing_translator::start_translation_timestep ()
{
- Global_context *global =get_global_context ();
+ Global_context *global = get_global_context ();
Moment now = global->now_mom ();
- Moment dt = now - global->previous_moment ();
+ Moment dt = now - global->previous_moment ();
if (dt < Moment (0))
{
- programming_error ("Moving backwards in time");
+ programming_error ("moving backwards in time");
dt = 0;
}
else if (dt.main_part_.is_infinity ())
{
- programming_error ("Moving infinitely to future");
+ programming_error ("moving infinitely to future");
dt = 0;
}
-
+
if (!dt.to_bool ())
return;
Moment measposp;
SCM s = get_property ("measurePosition");
- if (unsmob_moment (s))
- {
- measposp = *unsmob_moment (s);
- }
+ if (Moment::unsmob (s))
+ measposp = *Moment::unsmob (s);
else
{
measposp = now;
- daddy_context_->set_property ("measurePosition",
- measposp.smobbed_copy ());
- }
-
- measposp += dt;
-
- SCM barn = get_property ("currentBarNumber");
- int b = 0;
- if (ly_number_p (barn))
- {
- b = ly_scm2int (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);
+ bool c = to_boolean (cad);
- Rational len = measure_length ();
- while (c && measposp.main_part_ >= len)
+ if (c)
{
- measposp.main_part_ -= len;
- b ++;
+ Rational len = measure_length ();
+
+ measposp += dt;
+
+ while (measposp.main_part_ >= len)
+ {
+ measposp.main_part_ -= len;
+ current_barnumber++;
+ internal_barnumber++;
+ }
}
- daddy_context_->set_property ("currentBarNumber", scm_int2num (b));
- daddy_context_->set_property ("measurePosition", measposp.smobbed_copy ());
+
+ // 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_;
+
+
+ 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 ());
}
-ENTER_DESCRIPTION (Timing_translator,
- "This engraver adds the alias "
- "@code{Timing} to its containing context."
- ,
+#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 "
+ );
projects / lilypond.git / blobdiff