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 virtual bool do_try_music (Music* req_l);
32 virtual void do_process_music ();
33 virtual void do_pre_move_processing ();
36 Dynamic_script_req* script_req_l_;
37 Audio_dynamic* audio_p_;
40 ADD_THIS_TRANSLATOR (Dynamic_performer);
42 Dynamic_performer::Dynamic_performer ()
48 Dynamic_performer::~Dynamic_performer ()
54 Dynamic_performer::do_process_music ()
58 SCM proc = get_property ("dynamicAbsoluteVolumeFunction");
60 SCM svolume = SCM_EOL;
61 if (gh_procedure_p (proc))
64 svolume = gh_call1 (proc, script_req_l_->get_mus_property ("text"));
68 if (gh_number_p (svolume))
69 volume = gh_scm2double (svolume);
72 properties override default equaliser setting
74 SCM min = get_property ("midiMinimumVolume");
75 SCM max = get_property ("midiMaximumVolume");
76 if (gh_number_p (min) || gh_number_p (max))
79 if (gh_number_p (min))
80 iv[MIN] = gh_scm2double (min);
81 if (gh_number_p (max))
82 iv[MAX] = gh_scm2double (max);
83 volume = iv[MIN] + iv.length () * volume;
88 urg, code duplication:: staff_performer
90 SCM s = get_property ("midiInstrument");
93 s = get_property ("instrument");
96 s = ly_str02scm ("piano");
99 SCM eq = get_property ("instrumentEqualizer");
100 if (gh_procedure_p (eq))
102 s = gh_call1 (eq, s);
108 iv[MIN] = gh_scm2double (gh_car (s));
109 iv[MAX] = gh_scm2double (gh_cdr (s));
110 volume = iv[MIN] + iv.length () * volume;
114 audio_p_ = new Audio_dynamic (volume);
115 Audio_element_info info (audio_p_, script_req_l_);
116 announce_element (info);
122 Dynamic_performer::do_pre_move_processing ()
126 play_element (audio_p_);
132 Dynamic_performer::do_try_music (Music* r)
136 if(Dynamic_script_req* d = dynamic_cast <Dynamic_script_req*> (r))