lily/score-performer.cc

   1 /*
   2   score-performer.cc -- implement Score_performer
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1996--2006 Jan Nieuwenhuizen <janneke@gnu.org>
   7 */
   8
   9 #include "score-performer.hh"
  10
  11 #include "audio-column.hh"
  12 #include "audio-item.hh"
  13 #include "context-def.hh"
  14 #include "context.hh"
  15 #include "dispatcher.hh"
  16 #include "global-context.hh"
  17 #include "performance.hh"
  18 #include "midi-stream.hh"
  19 #include "moment.hh"
  20 #include "output-def.hh"
  21 #include "string-convert.hh"
  22 #include "warn.hh"
  23 #include "audio-staff.hh"
  24 #include "audio-item.hh"
  25
  26 ADD_TRANSLATOR_GROUP (Score_performer,
  27                       /* doc */ "",
  28                       /* create */ "",
  29                       /* accept */ "",
  30                       /* read */ "",
  31                       /* write */ "");
  32
  33 Score_performer::Score_performer ()
  34 {
  35   performance_ = 0;
  36   skipping_ = false;
  37   audio_column_ = 0;
  38 }
  39
  40 Score_performer::~Score_performer ()
  41 {
  42 }
  43
  44 void
  45 Score_performer::announce_element (Audio_element_info info)
  46 {
  47   announce_infos_.push_back (info);
  48   if (Audio_staff *s = dynamic_cast<Audio_staff*> (info.elem_))
  49     {
  50       performance_->audio_staffs_.push_back (s);
  51     }
  52
  53   performance_->add_element (info.elem_);
  54 }
  55
  56 void
  57 Score_performer::acknowledge_audio_elements ()
  58 {
  59   for (vsize i = 0; i < announce_infos_.size (); i++)
  60     {
  61       if (Audio_item *ai = dynamic_cast<Audio_item *> (announce_infos_[i].elem_))
  62         audio_column_->add_audio_item (ai);
  63     }
  64   Performer_group::acknowledge_audio_elements ();
  65 }
  66
  67
  68 void
  69 Score_performer::connect_to_context (Context *c)
  70 {
  71   Performer_group::connect_to_context (c);
  72
  73   Dispatcher *d = c->get_global_context ()->event_source ();
  74   d->add_listener (GET_LISTENER (one_time_step), ly_symbol2scm ("OneTimeStep"));
  75   d->add_listener (GET_LISTENER (prepare), ly_symbol2scm ("Prepare"));
  76   d->add_listener (GET_LISTENER (finish), ly_symbol2scm ("Finish"));
  77 }
  78
  79 void
  80 Score_performer::disconnect_from_context ()
  81 {
  82   Dispatcher *d = context ()->get_global_context ()->event_source ();
  83   d->remove_listener (GET_LISTENER (one_time_step), ly_symbol2scm ("OneTimeStep"));
  84   d->remove_listener (GET_LISTENER (prepare), ly_symbol2scm ("Prepare"));
  85   d->remove_listener (GET_LISTENER (finish), ly_symbol2scm ("Finish"));
  86
  87   Performer_group::disconnect_from_context ();
  88 }
  89
  90 IMPLEMENT_LISTENER (Score_performer, prepare);
  91 void
  92 Score_performer::prepare (SCM sev)
  93 {
  94   Stream_event *ev = unsmob_stream_event (sev);
  95   SCM sm = ev->get_property ("moment");
  96   Moment *m = unsmob_moment (sm);
  97   audio_column_ = new Audio_column (*m);
  98   precomputed_recurse_over_translators (context (), START_TRANSLATION_TIMESTEP, UP);
  99 }
 100
 101 IMPLEMENT_LISTENER (Score_performer, finish);
 102 void
 103 Score_performer::finish (SCM)
 104 {
 105   recurse_over_translators (context (),
 106                             &Translator::finalize,
 107                             &Translator_group::finalize,
 108                             UP);
 109 }
 110
 111 IMPLEMENT_LISTENER (Score_performer, one_time_step);
 112 void
 113 Score_performer::one_time_step (SCM)
 114 {
 115   if (to_boolean (context ()->get_property ("skipTypesetting")))
 116     {
 117       if (!skipping_)
 118         {
 119           skip_start_mom_ = audio_column_->at_mom ();
 120           skipping_ = true;
 121         }
 122     }
 123   else
 124     {
 125       if (skipping_)
 126         {
 127           offset_mom_ -= audio_column_->at_mom () - skip_start_mom_;
 128           skipping_ = false;
 129         }
 130
 131       audio_column_->offset_at_mom (offset_mom_);
 132       precomputed_recurse_over_translators (context (), PROCESS_MUSIC, UP);
 133       do_announces ();
 134     }
 135
 136   precomputed_recurse_over_translators (context (), STOP_TRANSLATION_TIMESTEP, UP);
 137 }
 138
 139 void
 140 Score_performer::derived_mark () const
 141 {
 142   if (performance_)
 143     scm_gc_mark (performance_->self_scm ());
 144
 145   Performer_group::derived_mark ();
 146 }
 147
 148 void
 149 Score_performer::initialize ()
 150 {
 151   performance_ = new Performance;
 152   performance_->unprotect ();
 153   context ()->set_property ("output", performance_->self_scm ());
 154   performance_->midi_ = context ()->get_output_def ();
 155
 156
 157   Translator_group::initialize ();
 158 }
 159
 160