lily/score-performer.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 1996--2011 Jan Nieuwenhuizen <janneke@gnu.org>
   5
   6   LilyPond is free software: you can redistribute it and/or modify
   7   it under the terms of the GNU General Public License as published by
   8   the Free Software Foundation, either version 3 of the License, or
   9   (at your option) any later version.
  10
  11   LilyPond is distributed in the hope that it will be useful,
  12   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14   GNU General Public License for more details.
  15
  16   You should have received a copy of the GNU General Public License
  17   along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "score-performer.hh"
  21
  22 #include "audio-column.hh"
  23 #include "audio-item.hh"
  24 #include "context-def.hh"
  25 #include "dispatcher.hh"
  26 #include "global-context.hh"
  27 #include "performance.hh"
  28 #include "midi-stream.hh"
  29 #include "output-def.hh"
  30 #include "string-convert.hh"
  31 #include "warn.hh"
  32 #include "audio-staff.hh"
  33 #include "audio-item.hh"
  34
  35 ADD_TRANSLATOR_GROUP (Score_performer,
  36                       /* doc */
  37                       "",
  38
  39                       /* create */
  40                       "",
  41
  42                       /* read */
  43                       "",
  44
  45                       /* write */
  46                       ""
  47                       );
  48
  49 Score_performer::Score_performer ()
  50 {
  51   performance_ = 0;
  52   skipping_ = false;
  53   audio_column_ = 0;
  54 }
  55
  56 Score_performer::~Score_performer ()
  57 {
  58 }
  59
  60 void
  61 Score_performer::announce_element (Audio_element_info info)
  62 {
  63   announce_infos_.push_back (info);
  64   if (Audio_staff *s = dynamic_cast<Audio_staff*> (info.elem_))
  65     {
  66       performance_->audio_staffs_.push_back (s);
  67     }
  68
  69   performance_->add_element (info.elem_);
  70 }
  71
  72 void
  73 Score_performer::acknowledge_audio_elements ()
  74 {
  75   for (vsize i = 0; i < announce_infos_.size (); i++)
  76     {
  77       if (Audio_item *ai = dynamic_cast<Audio_item *> (announce_infos_[i].elem_))
  78         audio_column_->add_audio_item (ai);
  79     }
  80   Performer_group::acknowledge_audio_elements ();
  81 }
  82
  83
  84 void
  85 Score_performer::connect_to_context (Context *c)
  86 {
  87   Performer_group::connect_to_context (c);
  88
  89   Dispatcher *d = c->get_global_context ()->event_source ();
  90   d->add_listener (GET_LISTENER (one_time_step), ly_symbol2scm ("OneTimeStep"));
  91   d->add_listener (GET_LISTENER (prepare), ly_symbol2scm ("Prepare"));
  92   d->add_listener (GET_LISTENER (finish), ly_symbol2scm ("Finish"));
  93 }
  94
  95 void
  96 Score_performer::disconnect_from_context ()
  97 {
  98   Dispatcher *d = context ()->get_global_context ()->event_source ();
  99   d->remove_listener (GET_LISTENER (one_time_step), ly_symbol2scm ("OneTimeStep"));
 100   d->remove_listener (GET_LISTENER (prepare), ly_symbol2scm ("Prepare"));
 101   d->remove_listener (GET_LISTENER (finish), ly_symbol2scm ("Finish"));
 102
 103   Performer_group::disconnect_from_context ();
 104 }
 105
 106 IMPLEMENT_LISTENER (Score_performer, prepare);
 107 void
 108 Score_performer::prepare (SCM sev)
 109 {
 110   Stream_event *ev = unsmob_stream_event (sev);
 111   SCM sm = ev->get_property ("moment");
 112   Moment *m = unsmob_moment (sm);
 113   audio_column_ = new Audio_column (*m);
 114   announce_element (Audio_element_info (audio_column_, 0));
 115   precomputed_recurse_over_translators (context (), START_TRANSLATION_TIMESTEP, UP);
 116 }
 117
 118 IMPLEMENT_LISTENER (Score_performer, finish);
 119 void
 120 Score_performer::finish (SCM)
 121 {
 122   SCM channel_mapping = context ()->get_property ("midiChannelMapping");
 123   bool use_ports = channel_mapping == ly_symbol2scm ("voice");
 124   performance_->ports_ = use_ports;
 125   recurse_over_translators (context (),
 126                             &Translator::finalize,
 127                             &Translator_group::finalize,
 128                             UP);
 129 }
 130
 131 IMPLEMENT_LISTENER (Score_performer, one_time_step);
 132 void
 133 Score_performer::one_time_step (SCM)
 134 {
 135   if (to_boolean (context ()->get_property ("skipTypesetting")))
 136     {
 137       if (!skipping_)
 138         {
 139           skip_start_mom_ = audio_column_->when ();
 140           skipping_ = true;
 141         }
 142     }
 143   else
 144     {
 145       if (skipping_)
 146         {
 147           offset_mom_ -= audio_column_->when () - skip_start_mom_;
 148           skipping_ = false;
 149         }
 150
 151       audio_column_->offset_when (offset_mom_);
 152       precomputed_recurse_over_translators (context (), PROCESS_MUSIC, UP);
 153       do_announces ();
 154     }
 155
 156   precomputed_recurse_over_translators (context (), STOP_TRANSLATION_TIMESTEP, UP);
 157 }
 158
 159 void
 160 Score_performer::derived_mark () const
 161 {
 162   if (performance_)
 163     scm_gc_mark (performance_->self_scm ());
 164
 165   Performer_group::derived_mark ();
 166 }
 167
 168 void
 169 Score_performer::initialize ()
 170 {
 171   performance_ = new Performance;
 172   performance_->unprotect ();
 173   context ()->set_property ("output", performance_->self_scm ());
 174   performance_->midi_ = context ()->get_output_def ();
 175
 176
 177   Translator_group::initialize ();
 178 }
 179
 180