X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Ftiming-translator.cc;h=67c2ffeed1a34fded9052512ed206bac5abb53c8;hb=97a0169312a260933246ab224e4f8b0969871dd5;hp=c7e4e0303230c1de699b988f95b063e904b182a4;hpb=c330618390bab7301500f0462e299ba8115ab0bf;p=lilypond.git diff --git a/lily/timing-translator.cc b/lily/timing-translator.cc index c7e4e03032..67c2ffeed1 100644 --- a/lily/timing-translator.cc +++ b/lily/timing-translator.cc @@ -1,134 +1,259 @@ - /* - timing-translator.cc -- implement Timing_translator + This file is part of LilyPond, the GNU music typesetter. + + Copyright (C) 1997--2015 Han-Wen Nienhuys + + 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. - source file of the GNU LilyPond music typesetter + 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. - (c) 1997 Han-Wen Nienhuys + You should have received a copy of the GNU General Public License + along with LilyPond. If not, see . */ #include "timing-translator.hh" -#include "command-request.hh" + +#include "warn.hh" #include "translator-group.hh" -#include "global-translator.hh" +#include "global-context.hh" +#include "moment.hh" +#include "lily-imports.hh" -Timing_translator::Timing_translator () +void +Timing_translator::stop_translation_timestep () { - default_grouping_ = Rhythmic_grouping (MInterval (0,4),4); // ugh + Global_context *global = get_global_context (); + + if (to_boolean (get_property ("timing")) + && !to_boolean (get_property ("skipBars"))) + { + 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); + } + } } -bool -Timing_translator::do_try_request(Request*r) +void +Timing_translator::initialize () { - Command_req * c = r->command(); - if (!(c && c->timing())) - return false; - for (int i=0; i < timing_req_l_arr_.size (); i++) + Context *timing = unsmob + (Lily::ly_context_find (context ()->self_scm (), ly_symbol2scm ("Timing"))); + if (timing != context ()) { - if (timing_req_l_arr_[i]->equal_b(r)) - return true; - if (timing_req_l_arr_[i]->name() == r->name()) - { - r->warning (_("conflicting timing request")); - return false; - } + context ()->add_alias (ly_symbol2scm ("Timing")); + + if (!timing) + { + programming_error ("Can't find Timing context template"); + timing = context (); + } } - timing_req_l_arr_.push(c->timing()); - return true; -} + 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); -Meter_change_req* -Timing_translator::meter_req_l() const -{ - Meter_change_req *m_l=0; - for (int i=0; !m_l && i < timing_req_l_arr_.size (); i++) + SCM timeSignatureFraction = timing->get_property ("timeSignatureFraction"); + + if (!scm_is_pair (timeSignatureFraction)) { - m_l=timing_req_l_arr_[i]->meterchange(); + programming_error ("missing timeSignatureFraction"); + timeSignatureFraction = scm_cons (scm_from_int (4), scm_from_int (4)); } - return m_l; -} + context ()->set_property ("timeSignatureFraction", timeSignatureFraction); -void -Timing_translator::do_process_requests() -{ - for (int i=0; i < timing_req_l_arr_.size (); i++) + SCM measureLength = timing->get_property ("measureLength"); + + if (!unsmob (measureLength)) { - Timing_req * tr_l = timing_req_l_arr_[i]; - Meter_change_req *m_l = tr_l->meterchange(); - if (m_l) - { - int b_i= m_l->beats_i_; - int o_i = m_l->one_beat_i_; - if (! time_.allow_meter_change_b()) - tr_l->warning (_("Meter change not allowed here")); - else - { - time_.set_meter (b_i, o_i); - default_grouping_ = - Rhythmic_grouping (MInterval (0,Moment (b_i, o_i)), b_i); - } - } - else if (tr_l->partial()) - { - Moment m = tr_l->partial()->duration_; - String error = time_.try_set_partial_str (m); - if (error.length_i ()) - { - tr_l->warning (error); - } - else - time_.setpartial (m); - } - else if (tr_l->barcheck()) - { - if (time_.whole_in_measure_) - { - tr_l ->warning (_("Barcheck failed")); - - time_.whole_in_measure_ = 0; // resync - time_.error_b_ = true; - } - - } - else if (tr_l->cadenza()) - { - time_.set_cadenza (tr_l->cadenza()->on_b_); - - } - else if (tr_l->measuregrouping()) - { - default_grouping_ = - parse_grouping (tr_l->measuregrouping()->beat_i_arr_, - tr_l->measuregrouping()->elt_length_arr_); - - } + 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. + */ -void -Timing_translator::do_pre_move_processing() -{ - timing_req_l_arr_.set_size (0); - Global_translator *global_l = - daddy_trans_l_->ancestor_l (100)->global_l (); // ugh 100. + SCM timeSignatureSettings = timing->get_property ("timeSignatureSettings"); + if (!scm_is_pair (timeSignatureSettings)) + { + programming_error ("missing timeSignatureSettings"); + timeSignatureSettings = Lily::default_time_signature_settings; + } + context ()->set_property ("timeSignatureSettings", timeSignatureSettings); + + SCM beamExceptions = timing->get_property ("beamExceptions"); + if (!scm_is_pair (beamExceptions)) + { + beamExceptions = Lily::beam_exceptions (timeSignatureFraction, + timeSignatureSettings); + } + context ()->set_property ("beamExceptions", beamExceptions); + + SCM baseMoment = timing->get_property ("baseMoment"); + if (!unsmob (baseMoment)) + { + baseMoment = + Moment (ly_scm2rational + (Lily::base_length (timeSignatureFraction, + timeSignatureSettings))).smobbed_copy (); + } + context ()->set_property ("baseMoment", baseMoment); + + SCM beatStructure = timing->get_property ("beatStructure"); + if (!scm_is_pair (beatStructure)) + { + beatStructure = + Lily::beat_structure (ly_rational2scm (unsmob (baseMoment)->main_part_), + timeSignatureFraction, + timeSignatureSettings); + } + context ()->set_property ("beatStructure", beatStructure); + + context ()->set_property ("beamHalfMeasure", + timing->get_property ("beamHalfMeasure")); - if (!time_.cadenza_b_) - global_l->add_moment_to_process (time_.next_bar_moment ()); + context ()->set_property ("autoBeaming", + timing->get_property ("autoBeaming")); } -IMPLEMENT_IS_TYPE_B1(Timing_translator, Translator); -ADD_THIS_TRANSLATOR(Timing_translator); +Rational +Timing_translator::measure_length () const +{ + SCM l = get_property ("measureLength"); + if (unsmob (l)) + return unsmob (l)->main_part_; + else + return Rational (1); +} + +Timing_translator::Timing_translator (Context *c) + : Translator (c) +{ +} void -Timing_translator::do_creation_processing() +Timing_translator::start_translation_timestep () { - time_.when_ = now_moment (); + Global_context *global = get_global_context (); + + Moment now = global->now_mom (); + Moment dt = now - global->previous_moment (); + if (dt < Moment (0)) + { + programming_error ("moving backwards in time"); + dt = 0; + } + else if (dt.main_part_.is_infinity ()) + { + programming_error ("moving infinitely to future"); + dt = 0; + } + + if (!dt.to_bool ()) + return; + + Moment measposp; + + SCM s = get_property ("measurePosition"); + if (unsmob (s)) + measposp = *unsmob (s); + else + { + measposp = now; + } + + 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) + { + Rational len = measure_length (); + + measposp += dt; + + while (measposp.main_part_ >= len) + { + measposp.main_part_ -= len; + current_barnumber++; + internal_barnumber++; + } + } + + + // 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 ()); } +#include "translator.icc" + void -Timing_translator::do_post_move_processing() +Timing_translator::boot () { - time_.add (now_moment () - time_.when_); + } + +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 " + );