2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 1997--2012 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 "audio-item.hh"
22 #include "midi-item.hh"
23 #include "audio-column.hh"
25 Audio_instrument::Audio_instrument (string instrument_string)
27 str_ = instrument_string;
36 Audio_item::get_column () const
41 Audio_item::Audio_item ()
47 Audio_note::Audio_note (Pitch p, Moment m, bool tie_event, Pitch transposing)
50 transposing_ (transposing),
53 tie_event_ (tie_event)
58 Audio_note::tie_to (Audio_note *t, Moment skip)
61 Audio_note *first = t;
64 // Add the skip to the tied note and the length of the appended note
65 // to the full duration of the tie...
66 first->length_mom_ += skip + length_mom_;
71 Audio_note::to_string () const
73 string s = "#<Audio_note pitch ";
74 s += pitch_.to_string();
76 s += length_mom_.to_string();
79 s += " tied to " + tied_->to_string();
89 Audio_key::Audio_key (int acc, bool major)
95 Audio_dynamic::Audio_dynamic ()
101 Audio_span_dynamic::Audio_span_dynamic (Real min_volume, Real max_volume)
104 min_volume_ = min_volume;
105 max_volume_ = max_volume;
109 Audio_span_dynamic::add_absolute (Audio_dynamic *d)
112 dynamics_.push_back (d);
116 remap_grace_duration (Moment m)
118 return Moment (m.main_part_ + Rational (9, 40) * m.grace_part_,
123 moment_to_real (Moment m)
125 return remap_grace_duration (m).main_part_.to_double ();
129 moment_to_ticks (Moment m)
131 return int (moment_to_real (m) * 384 * 4);
135 Audio_span_dynamic::render ()
137 if (dynamics_.size () <= 1)
140 assert (dynamics_[0]->volume_ >= 0);
142 while (dynamics_.back ()->volume_ > 0
143 && dynamics_.size () > 1
144 && sign (dynamics_.back ()->volume_ - dynamics_[0]->volume_) != grow_dir_)
146 dynamics_.erase (dynamics_.end () - 1);
149 if (dynamics_.size () <= 1)
151 programming_error ("Impossible or ambiguous (de)crescendo in MIDI.");
155 Real start_v = dynamics_[0]->volume_;
156 if (dynamics_.back ()->volume_ < 0)
158 // The dynamic spanner does not end with an explicit dynamic script
159 // event. Adjust the end volume by at most 1/4 of the available
160 // volume range in this case.
161 dynamics_.back ()->volume_ = max (min (start_v + grow_dir_ * (max_volume_ - min_volume_) * 0.25, max_volume_), min_volume_);
164 Real delta_v = dynamics_.back ()->volume_ - dynamics_[0]->volume_;
166 Moment start = dynamics_[0]->get_column ()->when ();
168 Real total_t = moment_to_real (dynamics_.back ()->get_column ()->when () - start);
170 for (vsize i = 1; i < dynamics_.size (); i++)
172 Moment dt_moment = dynamics_[i]->get_column ()->when ()
175 Real dt = moment_to_real (dt_moment);
177 Real v = start_v + delta_v * (dt / total_t);
179 dynamics_[i]->volume_ = v;
183 Audio_tempo::Audio_tempo (int per_minute_4)
185 per_minute_4_ = per_minute_4;
188 Audio_time_signature::Audio_time_signature (int beats, int one_beat)
191 one_beat_ = one_beat;
194 Audio_text::Audio_text (Audio_text::Type type, string text_string)
196 text_string_ = text_string;