2 dynamic-performer.cc -- implement Dynamic_performer
4 source file of the GNU LilyPond music typesetter
6 (c) 2000 Jan Nieuwenhuizen <janneke@gnu.org>
9 #include "performer.hh"
10 #include "command-request.hh"
11 #include "musical-request.hh"
12 #include "audio-item.hh"
16 handle multiple requests
20 perform absolute (text) dynamics
22 class Dynamic_performer : public Performer
25 VIRTUAL_COPY_CONS (Translator);
28 ~Dynamic_performer ();
31 void do_print () const;
32 virtual bool do_try_music (Music* req_l);
33 virtual void do_process_music ();
34 virtual void do_pre_move_processing ();
37 Text_script_req* text_script_req_l_;
38 Audio_dynamic* audio_p_;
41 ADD_THIS_TRANSLATOR (Dynamic_performer);
43 Dynamic_performer::Dynamic_performer ()
45 text_script_req_l_ = 0;
49 Dynamic_performer::~Dynamic_performer ()
54 Dynamic_performer::do_print () const
57 if (text_script_req_l_)
58 text_script_req_l_->print ();
63 Dynamic_performer::do_process_music ()
65 if (text_script_req_l_)
70 (ly_symbol2scm ("dynamic-absolute-volume"),
71 ly_quote_scm (ly_str02scm (text_script_req_l_->text_str_.ch_C ())),
74 Real volume = gh_scm2double (scm_eval2 (ly_symbol2scm ("dynamic-default-volume"), SCM_EOL));
76 volume = gh_scm2double (s);
79 properties override default equaliser setting
81 SCM min = get_property ("midiMinimumVolume");
82 SCM max = get_property ("midiMaximumVolume");
83 if (gh_number_p (min) || gh_number_p (max))
86 if (gh_number_p (min))
87 iv[MIN] = gh_scm2double (min);
88 if (gh_number_p (max))
89 iv[MAX] = gh_scm2double (max);
90 volume = iv[MIN] + iv.length () * volume;
95 urg, code duplication:: staff_performer
97 s = get_property ("midiInstrument");
100 s = get_property ("instrument");
103 s = ly_str02scm ("piano");
106 s = scm_eval2 (gh_list (ly_symbol2scm ("instrument-equaliser"),
112 iv[MIN] = gh_scm2double (gh_car (s));
113 iv[MAX] = gh_scm2double (gh_cdr (s));
114 volume = iv[MIN] + iv.length () * volume;
118 audio_p_ = new Audio_dynamic (volume);
119 Audio_element_info info (audio_p_, text_script_req_l_);
120 announce_element (info);
121 text_script_req_l_ = 0;
126 Dynamic_performer::do_pre_move_processing ()
130 play_element (audio_p_);
136 Dynamic_performer::do_try_music (Music* r)
138 if (!text_script_req_l_)
140 // urg, text script, style `dynamic' is how absolute dynamics appear
141 if(Text_script_req* t = dynamic_cast <Text_script_req*> (r))
143 if (t->style_str_ == "dynamic")
145 text_script_req_l_ = t;