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--2004 Jan Nieuwenhuizen <janneke@gnu.org>
   7  */
   8
   9 #include "score-performer.hh"
  10 #include "midi-def.hh"
  11 #include "audio-column.hh"
  12 #include "audio-item.hh"
  13 #include "performance.hh"
  14 #include "midi-stream.hh"
  15 #include "string-convert.hh"
  16 #include "warn.hh"
  17 #include "context-def.hh"
  18
  19
  20
  21 ENTER_DESCRIPTION(Score_performer,
  22 /* descr */       "",
  23 /* creats*/       "",
  24 /* accepts */     "",
  25 /* acks  */      "",
  26 /* reads */       "",
  27 /* write */       "");
  28
  29
  30 Score_performer::Score_performer ()
  31 {
  32   performance_ = 0;
  33 }
  34
  35
  36 Score_performer::~Score_performer ()
  37 {
  38 }
  39
  40 void
  41 Score_performer::play_element (Audio_element * p)
  42 {
  43   if (Audio_item * i=dynamic_cast<Audio_item *> (p))
  44     {
  45       audio_column_->add_audio_item (i);
  46     }
  47   performance_->add_element (p);
  48 }
  49
  50 void
  51 Score_performer::announce_element (Audio_element_info info)
  52 {
  53   announce_infos_.push (info);
  54 }
  55
  56 void
  57 Score_performer::prepare (Moment m)
  58 {
  59   audio_column_ = new Audio_column (m);
  60   play_element (audio_column_);
  61   recurse_down_translators (daddy_context_, &Translator::start_translation_timestep, UP);
  62 }
  63
  64
  65 void
  66 Score_performer::one_time_step ()
  67 {
  68   recurse_down_translators (daddy_context_, &Performer::process_music, UP);
  69   recurse_down_translators (daddy_context_, &Performer::do_announces, UP);
  70   recurse_down_translators (daddy_context_, &Translator::stop_translation_timestep, UP);
  71 }
  72
  73 int
  74 Score_performer::get_tempo () const
  75 {
  76   return performance_->midi_->get_tempo (Moment (Rational (1, 4)));
  77 }
  78
  79
  80 Music_output *
  81 Score_performer::get_output ()
  82 {
  83   Music_output * o = performance_;
  84   performance_ =0;
  85   return o;
  86 }
  87
  88 void
  89 Score_performer::initialize ()
  90 {
  91   performance_ = new Performance;
  92   performance_->midi_ = dynamic_cast<Midi_def*> (get_output_def ());
  93
  94   Translator_group::initialize ();
  95 }