2 staff-performer.cc -- implement Staff_performer
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2005 Jan Nieuwenhuizen <janneke@gnu.org>
10 #include "audio-column.hh"
11 #include "audio-item.hh"
12 #include "audio-staff.hh"
13 #include "performer-group-performer.hh"
16 /** Perform a staff. Individual notes should have their instrument
17 (staff-wide) set, so we override play_element ()
19 class Staff_performer : public Performer_group_performer
22 TRANSLATOR_DECLARATIONS (Staff_performer);
25 String new_instrument_string ();
26 String instrument_string_;
29 virtual void play_element (Audio_element *p);
30 virtual void finalize ();
31 virtual void initialize ();
32 virtual void create_audio_elements ();
33 virtual void stop_translation_timestep ();
36 Audio_staff *audio_staff_;
37 Audio_instrument *instrument_;
38 Audio_text *instrument_name_;
43 ADD_TRANSLATOR (Staff_performer, "", "",
47 Staff_performer::Staff_performer ()
56 Staff_performer::~Staff_performer ()
61 Staff_performer::initialize ()
63 audio_staff_ = new Audio_staff;
64 announce_element (Audio_element_info (audio_staff_, 0));
66 name_ = new Audio_text (Audio_text::TRACK_NAME, context ()->id_string ());
67 announce_element (Audio_element_info (name_, 0));
69 tempo_ = new Audio_tempo (get_tempo ());
70 announce_element (Audio_element_info (tempo_, 0));
72 Performer_group_performer::initialize ();
76 Staff_performer::create_audio_elements ()
78 String str = new_instrument_string ();
81 instrument_name_ = new Audio_text (Audio_text::INSTRUMENT_NAME, str);
82 announce_element (Audio_element_info (instrument_name_, 0));
83 instrument_ = new Audio_instrument (str);
84 announce_element (Audio_element_info (instrument_, 0));
87 Have to be here before notes arrive into the staff.
89 play_element (instrument_);
90 play_element (instrument_name_);
92 Performer_group_performer::create_audio_elements ();
96 Staff_performer::stop_translation_timestep ()
98 SCM proc = ly_lily_module_constant ("percussion?");
100 SCM drums = scm_call_1 (proc, ly_symbol2scm (instrument_string_.to_str0 ()));
101 audio_staff_->channel_ = (drums == SCM_BOOL_T ? 9 : -1);
104 play_element (name_);
109 play_element (tempo_);
112 instrument_name_ = 0;
114 Performer_group_performer::stop_translation_timestep ();
118 Staff_performer::finalize ()
120 Performer_group_performer::finalize ();
121 Performer::play_element (audio_staff_);
126 Staff_performer::new_instrument_string ()
128 // mustn't ask Score for instrument: it will return piano!
129 SCM minstr = get_property ("midiInstrument");
131 if (!scm_is_string (minstr)
132 || ly_scm2string (minstr) == instrument_string_)
135 instrument_string_ = ly_scm2string (minstr);
137 return instrument_string_;
141 Staff_performer::play_element (Audio_element *p)
143 if (Audio_item *ai = dynamic_cast<Audio_item *> (p))
145 audio_staff_->add_audio_item (ai);
147 Performer::play_element (p);