2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 1997--2011 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_;
70 Audio_key::Audio_key (int acc, bool major)
76 Audio_dynamic::Audio_dynamic ()
82 Audio_span_dynamic::Audio_span_dynamic (Real min_volume, Real max_volume)
85 min_volume_ = min_volume;
86 max_volume_ = max_volume;
90 Audio_span_dynamic::add_absolute (Audio_dynamic *d)
93 dynamics_.push_back (d);
97 remap_grace_duration (Moment m)
99 return Moment (m.main_part_ + Rational (9, 40) * m.grace_part_,
104 moment_to_real (Moment m)
106 return remap_grace_duration (m).main_part_.to_double ();
110 moment_to_ticks (Moment m)
112 return int (moment_to_real (m) * 384 * 4);
116 Audio_span_dynamic::render ()
118 if (dynamics_.size () <= 1)
121 assert (dynamics_[0]->volume_ >= 0);
123 while (dynamics_.back ()->volume_ > 0
124 && dynamics_.size () > 1
125 && sign (dynamics_.back ()->volume_ - dynamics_[0]->volume_) != grow_dir_)
127 dynamics_.erase (dynamics_.end () - 1);
130 if (dynamics_.size () <= 1)
132 programming_error ("Impossible or ambiguous (de)crescendo in MIDI.");
136 Real delta_v = grow_dir_ * 0.1;
138 Real start_v = dynamics_[0]->volume_;
139 if (dynamics_.back ()->volume_ < 0)
140 dynamics_.back ()->volume_ = max (min (start_v + grow_dir_ * 0.25, max_volume_), min_volume_);
142 delta_v = dynamics_.back ()->volume_ - dynamics_[0]->volume_;
144 Moment start = dynamics_[0]->get_column ()->when ();
146 Real total_t = moment_to_real (dynamics_.back ()->get_column ()->when () - start);
148 for (vsize i = 1; i < dynamics_.size (); i++)
150 Moment dt_moment = dynamics_[i]->get_column ()->when ()
153 Real dt = moment_to_real (dt_moment);
155 Real v = start_v + delta_v * (dt / total_t);
157 dynamics_[i]->volume_ = v;
161 Audio_tempo::Audio_tempo (int per_minute_4)
163 per_minute_4_ = per_minute_4;
166 Audio_time_signature::Audio_time_signature (int beats, int one_beat)
169 one_beat_ = one_beat;
172 Audio_text::Audio_text (Audio_text::Type type, string text_string)
174 text_string_ = text_string;