lily/staff-performer.cc

   1 /*
   2   staff-performer.cc -- implement Staff_performer
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--1999 Jan Nieuwenhuizen <janneke@gnu.org>
   7  */
   8
   9 #include "staff-performer.hh"
  10 #include "translator-group.hh"
  11 #include "debug.hh"
  12 #include "audio-column.hh"
  13 #include "audio-item.hh"
  14 #include "audio-staff.hh"
  15
  16
  17 ADD_THIS_TRANSLATOR (Staff_performer);
  18
  19 Staff_performer::Staff_performer ()
  20 {
  21   audio_staff_p_ = 0;
  22   instrument_p_ = 0;
  23   instrument_name_p_ = 0;
  24   name_p_ = 0;
  25   tempo_p_ = 0;
  26 }
  27
  28 Staff_performer::~Staff_performer ()
  29 {
  30 }
  31
  32 void
  33 Staff_performer::do_creation_processing ()
  34 {
  35   audio_staff_p_ = new Audio_staff;
  36   announce_element (Audio_element_info (audio_staff_p_, 0));
  37
  38   name_p_ = new Audio_text (Audio_text::TRACK_NAME, id_str_);
  39   announce_element (Audio_element_info (name_p_, 0));
  40
  41   tempo_p_ = new Audio_tempo (get_tempo_i ());
  42   announce_element (Audio_element_info (tempo_p_, 0));
  43
  44   Performer_group_performer::do_creation_processing ();
  45 }
  46
  47 void
  48 Staff_performer::do_process_requests ()
  49 {
  50   String str = new_instrument_str ();
  51   if (str.length_i ())
  52     {
  53       instrument_name_p_ = new Audio_text (Audio_text::INSTRUMENT_NAME, str);
  54       announce_element (Audio_element_info (instrument_name_p_, 0));
  55       instrument_p_ = new Audio_instrument (str);
  56       announce_element (Audio_element_info (instrument_p_, 0));
  57     }
  58   Performer_group_performer::do_process_requests ();
  59 }
  60
  61 void
  62 Staff_performer::do_pre_move_processing ()
  63 {
  64   if (name_p_)
  65     {
  66       play_element (name_p_);
  67       name_p_ = 0;
  68     }
  69   if (tempo_p_)
  70     {
  71       play_element (tempo_p_);
  72       tempo_p_ = 0;
  73     }
  74   if (instrument_name_p_)
  75     {
  76       play_element (instrument_name_p_);
  77       instrument_name_p_ = 0;
  78     }
  79   if (instrument_p_)
  80     {
  81       play_element (instrument_p_);
  82       instrument_p_ = 0;
  83     }
  84   Performer_group_performer::do_pre_move_processing ();
  85 }
  86
  87 void
  88 Staff_performer::do_removal_processing ()
  89 {
  90   Performer_group_performer::do_removal_processing ();
  91   Performer::play_element (audio_staff_p_);
  92   audio_staff_p_ = 0;
  93 }
  94
  95 String
  96 Staff_performer::new_instrument_str ()
  97 {
  98   // mustn't ask Score for instrument: it will return piano!
  99   String str = get_property ("midiInstrument", 0);
 100   if (!str.length_i ())
 101     str = get_property ("instrument", 0);
 102   if (str == instrument_str_)
 103     return "";
 104
 105   instrument_str_ = str;
 106
 107   return instrument_str_;
 108
 109 /* ugh, but can 't
 110   if (properties_dict_.elem_b ("instrument"))
 111     return properties_dict_["instrument"];
 112   return "";
 113 */
 114 }
 115
 116 void
 117 Staff_performer::play_element (Audio_element* p)
 118 {
 119   if (Audio_item *ai = dynamic_cast<Audio_item *> (p))
 120     {
 121       audio_staff_p_->add_audio_item (ai);
 122     }
 123   Performer::play_element (p);
 124 }
 125