2 staff-performer.cc -- implement Staff_performer
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2004 Jan Nieuwenhuizen <janneke@gnu.org>
9 #include "translator-group.hh"
11 #include "audio-column.hh"
12 #include "audio-item.hh"
13 #include "audio-staff.hh"
14 #include "performer-group-performer.hh"
17 /** Perform a staff. Individual notes should have their instrument
18 (staff-wide) set, so we override play_element ()
21 class Staff_performer : public Performer_group_performer
24 TRANSLATOR_DECLARATIONS (Staff_performer);
27 String new_instrument_string ();
28 String instrument_string_;
31 virtual void play_element (Audio_element* p);
32 virtual void finalize ();
33 virtual void initialize ();
34 virtual void create_audio_elements ();
35 virtual void stop_translation_timestep ();
38 Audio_staff* audio_staff_;
39 Audio_instrument* instrument_;
40 Audio_text* instrument_name_;
45 ENTER_DESCRIPTION (Staff_performer, "", "",
49 Staff_performer::Staff_performer ()
58 Staff_performer::~Staff_performer ()
63 Staff_performer::initialize ()
65 audio_staff_ = new Audio_staff;
66 announce_element (Audio_element_info (audio_staff_, 0));
68 name_ = new Audio_text (Audio_text::TRACK_NAME, context ()->id_string ());
69 announce_element (Audio_element_info (name_, 0));
71 tempo_ = new Audio_tempo (get_tempo ());
72 announce_element (Audio_element_info (tempo_, 0));
74 Performer_group_performer::initialize ();
78 Staff_performer::create_audio_elements ()
80 String str = new_instrument_string ();
83 instrument_name_ = new Audio_text (Audio_text::INSTRUMENT_NAME, str);
84 announce_element (Audio_element_info (instrument_name_, 0));
85 instrument_ = new Audio_instrument (str);
86 announce_element (Audio_element_info (instrument_, 0));
89 Have to be here before notes arrive into the staff.
91 play_element (instrument_);
92 play_element (instrument_name_);
94 Performer_group_performer::create_audio_elements ();
98 Staff_performer::stop_translation_timestep ()
100 SCM proc = ly_scheme_function ("percussion?");
102 SCM drums = scm_call_1 (proc, ly_symbol2scm (instrument_string_.to_str0 ()));
103 audio_staff_->channel_ = (drums == SCM_BOOL_T ? 9 : -1 );
106 play_element (name_);
111 play_element (tempo_);
114 instrument_name_ = 0;
116 Performer_group_performer::stop_translation_timestep ();
120 Staff_performer::finalize ()
122 Performer_group_performer::finalize ();
123 Performer::play_element (audio_staff_);
128 Staff_performer::new_instrument_string ()
130 // mustn't ask Score for instrument: it will return piano!
131 SCM minstr = get_property ("midiInstrument");
133 if (!ly_c_string_p (minstr)
134 || ly_scm2string (minstr) == instrument_string_)
137 instrument_string_ = ly_scm2string (minstr);
139 return instrument_string_;
143 Staff_performer::play_element (Audio_element* p)
145 if (Audio_item *ai = dynamic_cast<Audio_item *> (p))
147 audio_staff_->add_audio_item (ai);
149 Performer::play_element (p);