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 = tie_head();
62 // Add the skip to the tied note and the length of the appended note
63 // to the full duration of the tie...
64 first->length_mom_ += skip + length_mom_;
69 Audio_note::tie_head ()
71 Audio_note *first = this;
78 Audio_note::to_string () const
80 string s = "#<Audio_note pitch ";
81 s += pitch_.to_string();
83 s += length_mom_.to_string();
86 s += " tied to " + tied_->to_string();
96 Audio_key::Audio_key (int acc, bool major)
102 Audio_dynamic::Audio_dynamic ()
108 Audio_span_dynamic::Audio_span_dynamic (Real min_volume, Real max_volume)
111 min_volume_ = min_volume;
112 max_volume_ = max_volume;
116 Audio_span_dynamic::add_absolute (Audio_dynamic *d)
119 dynamics_.push_back (d);
123 remap_grace_duration (Moment m)
125 return Moment (m.main_part_ + Rational (9, 40) * m.grace_part_,
130 moment_to_real (Moment m)
132 return remap_grace_duration (m).main_part_.to_double ();
136 moment_to_ticks (Moment m)
138 return int (moment_to_real (m) * 384 * 4);
142 Audio_span_dynamic::render ()
144 if (dynamics_.size () <= 1)
147 assert (dynamics_[0]->volume_ >= 0);
149 while (dynamics_.back ()->volume_ > 0
150 && dynamics_.size () > 1
151 && sign (dynamics_.back ()->volume_ - dynamics_[0]->volume_) != grow_dir_)
153 dynamics_.erase (dynamics_.end () - 1);
156 if (dynamics_.size () <= 1)
158 programming_error ("Impossible or ambiguous (de)crescendo in MIDI.");
162 Real start_v = dynamics_[0]->volume_;
163 if (dynamics_.back ()->volume_ < 0)
165 // The dynamic spanner does not end with an explicit dynamic script
166 // event. Adjust the end volume by at most 1/4 of the available
167 // volume range in this case.
168 dynamics_.back ()->volume_ = max (min (start_v + grow_dir_ * (max_volume_ - min_volume_) * 0.25, max_volume_), min_volume_);
171 Real delta_v = dynamics_.back ()->volume_ - dynamics_[0]->volume_;
173 Moment start = dynamics_[0]->get_column ()->when ();
175 Real total_t = moment_to_real (dynamics_.back ()->get_column ()->when () - start);
177 for (vsize i = 1; i < dynamics_.size (); i++)
179 Moment dt_moment = dynamics_[i]->get_column ()->when ()
182 Real dt = moment_to_real (dt_moment);
184 Real v = start_v + delta_v * (dt / total_t);
186 dynamics_[i]->volume_ = v;
190 Audio_tempo::Audio_tempo (int per_minute_4)
192 per_minute_4_ = per_minute_4;
195 Audio_time_signature::Audio_time_signature (int beats, int one_beat)
198 one_beat_ = one_beat;
201 Audio_text::Audio_text (Audio_text::Type type, const string &text_string)
203 text_string_ = text_string;