2 span-dynamic-performer.cc -- implement Span_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"
14 struct Audio_dynamic_tuple
16 Audio_dynamic* audio_l_;
23 class Span_dynamic_performer : public Performer
26 VIRTUAL_COPY_CONS (Translator);
28 Span_dynamic_performer ();
31 virtual bool do_try_music (Music*);
32 virtual void acknowledge_element (Audio_element_info);
33 virtual void process_acknowledged ();
34 virtual void do_process_music ();
35 virtual void do_pre_move_processing ();
36 virtual void do_post_move_processing ();
39 Audio_dynamic* audio_p_;
41 Span_req* span_start_req_l_;
42 Drul_array<Span_req*> span_req_l_drul_;
43 Array<Audio_dynamic_tuple> dynamic_tuple_arr_;
44 Array<Audio_dynamic_tuple> finished_dynamic_tuple_arr_;
46 Direction finished_dir_;
49 ADD_THIS_TRANSLATOR (Span_dynamic_performer);
51 Span_dynamic_performer::Span_dynamic_performer ()
53 span_req_l_drul_[START] = 0;
54 span_req_l_drul_[STOP] = 0;
55 span_start_req_l_ = 0;
61 Span_dynamic_performer::acknowledge_element (Audio_element_info i)
63 if (Audio_dynamic * d = dynamic_cast <Audio_dynamic*> (i.elem_l_))
65 last_volume_ = d->volume_;
70 Span_dynamic_performer::do_process_music ()
72 if (span_start_req_l_ || span_req_l_drul_[START])
74 audio_p_ = new Audio_dynamic (0);
75 Audio_element_info info (audio_p_, span_req_l_drul_[START]
76 ? span_req_l_drul_[START]
77 : span_req_l_drul_[STOP]);
78 announce_element (info);
79 Audio_dynamic_tuple a = { audio_p_, now_mom () };
80 dynamic_tuple_arr_.push (a);
83 if (span_req_l_drul_[STOP])
85 if (!span_start_req_l_)
87 span_req_l_drul_[STOP]->origin ()->warning (_ ("can't find start of (de)crescendo"));
92 finished_dynamic_tuple_arr_ = dynamic_tuple_arr_;
94 dynamic_tuple_arr_.clear ();
95 span_start_req_l_ = 0;
98 if (span_req_l_drul_[START])
100 dir_ = span_req_l_drul_[START]->span_type_str_ == "crescendo"
102 span_start_req_l_ = span_req_l_drul_[START];
104 dynamic_tuple_arr_.clear ();
105 Audio_dynamic_tuple a = { audio_p_, now_mom () };
106 dynamic_tuple_arr_.push (a);
111 Span_dynamic_performer::process_acknowledged ()
113 if (span_req_l_drul_[STOP])
115 finished_dynamic_tuple_arr_.top ().audio_l_->volume_ = last_volume_;
118 if (span_req_l_drul_[START])
120 dynamic_tuple_arr_[0].audio_l_->volume_ = last_volume_;
125 Span_dynamic_performer::do_pre_move_processing ()
127 if (finished_dynamic_tuple_arr_.size () > 1)
129 Real start_volume = finished_dynamic_tuple_arr_[0].audio_l_->volume_;
130 Real dv = finished_dynamic_tuple_arr_.top ().audio_l_->volume_
134 Catch and fix the case of:
138 f cresc. -- -- -- -- -- pp
140 Actually, we should provide a non-displayed dynamic/volume setting,
141 to set volume to 'ff' just before the pp.
143 if (!dv || sign (dv) != finished_dir_)
145 // urg. 20%: about two volume steps
146 dv = (Real)finished_dir_ * 0.2;
148 start_volume = finished_dynamic_tuple_arr_.top
149 ().audio_l_->volume_ - dv;
151 Moment start_mom = finished_dynamic_tuple_arr_[0].mom_;
152 Moment dt = finished_dynamic_tuple_arr_.top ().mom_ - start_mom;
153 for (int i=0; i < finished_dynamic_tuple_arr_.size (); i++)
155 Audio_dynamic_tuple* a = &finished_dynamic_tuple_arr_[i];
156 Real volume = start_volume + dv * (Real)(a->mom_ - start_mom)
158 a->audio_l_->volume_ = volume;
160 finished_dynamic_tuple_arr_.clear ();
165 play_element (audio_p_);
171 Span_dynamic_performer::do_post_move_processing ()
173 span_req_l_drul_[STOP] = 0;
174 span_req_l_drul_[START] = 0;
178 Span_dynamic_performer::do_try_music (Music* r)
180 if (Span_req * s = dynamic_cast<Span_req*>(r))
182 if (s-> span_type_str_ == "crescendo"
183 || s->span_type_str_ == "decrescendo")
185 span_req_l_drul_[s->span_dir_] = s;