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 "moment.hh"
  10 #include "score-performer.hh"
  11
  12 #include "audio-column.hh"
  13 #include "audio-item.hh"
  14 #include "performance.hh"
  15 #include "midi-stream.hh"
  16 #include "string-convert.hh"
  17 #include "warn.hh"
  18 #include "context-def.hh"
  19 #include "output-def.hh"
  20 #include "context.hh"
  21
  22 ADD_TRANSLATOR_GROUP (Score_performer,
  23                       /* doc */ "",
  24                       /* create */ "",
  25                       /* accept */ "",
  26                       /* read */ "",
  27                       /* write */ "");
  28
  29 Score_performer::Score_performer ()
  30 {
  31   performance_ = 0;
  32   skipping_ = false;
  33 }
  34
  35 Score_performer::~Score_performer ()
  36 {
  37 }
  38
  39 void
  40 Score_performer::play_element (Audio_element *p)
  41 {
  42   if (Audio_item *i = dynamic_cast<Audio_item *> (p))
  43     audio_column_->add_audio_item (i);
  44   performance_->add_element (p);
  45 }
  46
  47 void
  48 Score_performer::announce_element (Audio_element_info info)
  49 {
  50   announce_infos_.push_back (info);
  51 }
  52
  53 void
  54 Score_performer::prepare (Moment m)
  55 {
  56   audio_column_ = new Audio_column (m);
  57   play_element (audio_column_);
  58   precomputed_recurse_over_translators (context (), START_TRANSLATION_TIMESTEP, UP);
  59 }
  60
  61 void
  62 Score_performer::finish ()
  63 {
  64   recurse_over_translators (context (),
  65                             &Translator::finalize,
  66                             &Translator_group::finalize,
  67                             UP);
  68 }
  69
  70 void
  71 Score_performer::one_time_step ()
  72 {
  73   if (to_boolean (context ()->get_property ("skipTypesetting")))
  74     {
  75       if (!skipping_)
  76         {
  77           skip_start_mom_ = audio_column_->at_mom ();
  78           skipping_ = true;
  79         }
  80     }
  81   else
  82     {
  83       if (skipping_)
  84         {
  85           offset_mom_ -= audio_column_->at_mom () - skip_start_mom_;
  86           skipping_ = false;
  87         }
  88
  89       audio_column_->offset_at_mom (offset_mom_);
  90       precomputed_recurse_over_translators (context (), PROCESS_MUSIC, UP);
  91       do_announces ();
  92     }
  93
  94   precomputed_recurse_over_translators (context (), STOP_TRANSLATION_TIMESTEP, UP);
  95 }
  96
  97 int
  98 Score_performer::get_tempo () const
  99 {
 100   return ::get_tempo (performance_->midi_, Moment (Rational (1, 4)));
 101 }
 102
 103 SCM
 104 Score_performer::get_output ()
 105 {
 106   Music_output *o = performance_;
 107   performance_ = 0;
 108   return o->self_scm ();
 109 }
 110
 111 void
 112 Score_performer::derived_mark () const
 113 {
 114   if (performance_)
 115     scm_gc_mark (performance_->self_scm ());
 116
 117   Score_translator::derived_mark ();
 118   Performer_group::derived_mark ();
 119 }
 120
 121 void
 122 Score_performer::initialize ()
 123 {
 124   performance_ = new Performance;
 125   performance_->unprotect ();
 126   performance_->midi_ = context ()->get_output_def ();
 127
 128   Translator_group::initialize ();
 129 }