2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2000--2015 Jan Nieuwenhuizen <janneke@gnu.org>
6 LilyPond is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 LilyPond is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
20 #include "performer.hh"
21 #include "audio-item.hh"
22 #include "stream-event.hh"
23 #include "international.hh"
25 #include "translator.icc"
27 class Dynamic_performer : public Performer
30 TRANSLATOR_DECLARATIONS (Dynamic_performer);
32 void stop_translation_timestep ();
33 void process_music ();
34 Real equalize_volume (Real);
36 void listen_decrescendo (Stream_event *);
37 void listen_crescendo (Stream_event *);
38 void listen_absolute_dynamic (Stream_event *);
40 Stream_event *script_event_;
41 Drul_array<Stream_event *> span_events_;
42 Drul_array<Direction> grow_dir_;
44 Audio_dynamic *absolute_;
45 Audio_span_dynamic *span_dynamic_;
46 Audio_span_dynamic *finished_span_dynamic_;
49 Dynamic_performer::Dynamic_performer ()
55 = span_events_[RIGHT] = 0;
57 finished_span_dynamic_ = 0;
61 Dynamic_performer::equalize_volume (Real volume)
64 properties override default equaliser setting
66 SCM min = get_property ("midiMinimumVolume");
67 SCM max = get_property ("midiMaximumVolume");
68 if (scm_is_number (min) || scm_is_number (max))
71 if (scm_is_number (min))
72 iv[MIN] = scm_to_double (min);
73 if (scm_is_number (max))
74 iv[MAX] = scm_to_double (max);
75 volume = iv[MIN] + iv.length () * volume;
80 urg, code duplication:: staff_performer
82 SCM s = get_property ("midiInstrument");
84 if (!scm_is_string (s))
85 s = get_property ("instrumentName");
87 if (!scm_is_string (s))
88 s = scm_from_ascii_string ("piano");
90 SCM eq = get_property ("instrumentEqualizer");
91 if (ly_is_procedure (eq))
92 s = scm_call_1 (eq, s);
94 if (is_number_pair (s))
96 Interval iv = ly_scm2interval (s);
97 volume = iv[MIN] + iv.length () * volume;
104 Dynamic_performer::process_music ()
106 if (span_events_[START] || span_events_[STOP] || script_event_)
108 // End the previous spanner when a new one begins or at an explicit stop
109 // or absolute dynamic.
110 finished_span_dynamic_ = span_dynamic_;
114 if (span_events_[START])
116 // Start of a dynamic spanner. Create a new Audio_span_dynamic for
117 // collecting changes in dynamics within this spanner.
118 span_dynamic_ = new Audio_span_dynamic (equalize_volume (0.1), equalize_volume (1.0));
119 announce_element (Audio_element_info (span_dynamic_, span_events_[START]));
121 span_dynamic_->grow_dir_ = grow_dir_[START];
126 || finished_span_dynamic_)
128 // New change in dynamics.
129 absolute_ = new Audio_dynamic ();
133 // Explicit dynamic script event: determine the volume.
134 SCM proc = get_property ("dynamicAbsoluteVolumeFunction");
136 SCM svolume = SCM_EOL;
137 if (ly_is_procedure (proc))
140 svolume = scm_call_1 (proc, script_event_->get_property ("text"));
143 Real volume = robust_scm2double (svolume, 0.5);
146 = absolute_->volume_ = equalize_volume (volume);
149 Audio_element_info info (absolute_, script_event_);
150 announce_element (info);
153 if (last_volume_ < 0)
155 absolute_ = new Audio_dynamic ();
158 = absolute_->volume_ = equalize_volume (0.71); // Backward compatible
160 Audio_element_info info (absolute_, script_event_);
161 announce_element (info);
165 span_dynamic_->add_absolute (absolute_);
167 if (finished_span_dynamic_)
168 finished_span_dynamic_->add_absolute (absolute_);
172 Dynamic_performer::stop_translation_timestep ()
174 if (finished_span_dynamic_)
176 finished_span_dynamic_->render ();
177 finished_span_dynamic_ = 0;
182 if (absolute_->volume_ < 0)
184 absolute_->volume_ = last_volume_;
188 last_volume_ = absolute_->volume_;
195 = span_events_[RIGHT] = 0;
199 Dynamic_performer::listen_decrescendo (Stream_event *r)
201 Direction d = to_dir (r->get_property ("span-direction"));
203 grow_dir_[d] = SMALLER;
207 Dynamic_performer::listen_crescendo (Stream_event *r)
209 Direction d = to_dir (r->get_property ("span-direction"));
211 grow_dir_[d] = BIGGER;
215 Dynamic_performer::listen_absolute_dynamic (Stream_event *r)
222 Dynamic_performer::boot ()
224 ADD_LISTENER (Dynamic_performer, decrescendo);
225 ADD_LISTENER (Dynamic_performer, crescendo);
226 ADD_LISTENER (Dynamic_performer, absolute_dynamic);
229 ADD_TRANSLATOR (Dynamic_performer,
237 "dynamicAbsoluteVolumeFunction "
238 "instrumentEqualizer "