--- /dev/null
+/*
+ dynamic-performer.cc -- implement New_dynamic_performer
+
+ source file of the GNU LilyPond music typesetter
+
+ (c) 2000--2006 Jan Nieuwenhuizen <janneke@gnu.org>
+*/
+
+#include "performer.hh"
+#include "audio-item.hh"
+#include "stream-event.hh"
+
+#include "translator.icc"
+
+/*
+ TODO:
+
+ handle multiple events
+
+ perform absolute (text) dynamics
+*/
+class New_dynamic_performer : public Performer
+{
+public:
+ TRANSLATOR_DECLARATIONS (New_dynamic_performer);
+protected:
+ void stop_translation_timestep ();
+ void process_music ();
+ Real equalize_volume (Real);
+
+ DECLARE_TRANSLATOR_LISTENER (decrescendo);
+ DECLARE_TRANSLATOR_LISTENER (crescendo);
+ DECLARE_TRANSLATOR_LISTENER (absolute_dynamic);
+private:
+ Stream_event *script_event_;
+ Drul_array<Stream_event*> span_events_;
+ Drul_array<Direction> grow_dir_;
+ Real last_volume_;
+ Audio_dynamic *absolute_;
+ Audio_span_dynamic *span_dynamic_;
+ Audio_span_dynamic *finished_span_dynamic_;
+};
+
+New_dynamic_performer::New_dynamic_performer ()
+{
+ last_volume_ = 0.5;
+ script_event_ = 0;
+ absolute_ = 0;
+ span_events_[LEFT] =
+ span_events_[RIGHT] = 0;
+ span_dynamic_ = 0;
+ finished_span_dynamic_ = 0;
+}
+
+Real
+New_dynamic_performer::equalize_volume (Real volume)
+{
+ /*
+ properties override default equaliser setting
+ */
+ SCM min = get_property ("midiMinimumVolume");
+ SCM max = get_property ("midiMaximumVolume");
+ if (scm_is_number (min) || scm_is_number (max))
+ {
+ Interval iv (0, 1);
+ if (scm_is_number (min))
+ iv[MIN] = scm_to_double (min);
+ if (scm_is_number (max))
+ iv[MAX] = scm_to_double (max);
+ volume = iv[MIN] + iv.length () * volume;
+ }
+ else
+ {
+ /*
+ urg, code duplication:: staff_performer
+ */
+ SCM s = get_property ("midiInstrument");
+
+ if (!scm_is_string (s))
+ s = get_property ("instrumentName");
+
+ if (!scm_is_string (s))
+ s = scm_from_locale_string ("piano");
+
+ SCM eq = get_property ("instrumentEqualizer");
+ if (ly_is_procedure (eq))
+ s = scm_call_1 (eq, s);
+
+ if (is_number_pair (s))
+ {
+ Interval iv = ly_scm2interval (s);
+ volume = iv[MIN] + iv.length () * volume;
+ }
+ }
+ return volume;
+}
+
+
+void
+New_dynamic_performer::process_music ()
+{
+ if (span_events_[STOP] || script_event_)
+ {
+ finished_span_dynamic_ = span_dynamic_;
+ span_dynamic_ = 0;
+ }
+
+ if (span_events_[START])
+ {
+ span_dynamic_ = new Audio_span_dynamic();
+ announce_element (Audio_element_info (span_dynamic_, span_events_[START]));
+
+ span_dynamic_->grow_dir_ = grow_dir_[START];
+ }
+
+ if (script_event_
+ || span_dynamic_
+ || finished_span_dynamic_)
+ {
+ absolute_ = new Audio_dynamic ();
+
+ if (script_event_)
+ {
+ SCM proc = get_property ("dynamicAbsoluteVolumeFunction");
+
+ SCM svolume = SCM_EOL;
+ if (ly_is_procedure (proc))
+ {
+ // urg
+ svolume = scm_call_1 (proc, script_event_->get_property ("text"));
+ }
+
+ Real volume = robust_scm2double (svolume, 0.5);
+
+ last_volume_
+ = absolute_->volume_ = equalize_volume (volume);
+ }
+
+ Audio_element_info info (absolute_, script_event_);
+ announce_element (info);
+ }
+
+
+ if (span_dynamic_)
+ span_dynamic_->add_absolute (absolute_);
+
+ if (finished_span_dynamic_)
+ finished_span_dynamic_->add_absolute (absolute_);
+}
+
+void
+New_dynamic_performer::stop_translation_timestep ()
+{
+ if (finished_span_dynamic_)
+ {
+ finished_span_dynamic_->render ();
+ finished_span_dynamic_ = 0;
+ }
+
+
+ if (absolute_ && absolute_->volume_ < 0)
+ {
+ absolute_->volume_ = last_volume_;
+ }
+ else if (absolute_)
+ {
+ last_volume_ = absolute_->volume_;
+ }
+
+ absolute_ = 0;
+ script_event_ = 0;
+ span_events_[LEFT] =
+ span_events_[RIGHT] = 0;
+}
+
+IMPLEMENT_TRANSLATOR_LISTENER (New_dynamic_performer, decrescendo);
+void
+New_dynamic_performer::listen_decrescendo (Stream_event *r)
+{
+ Direction d = to_dir (r->get_property ("span-direction"));
+ span_events_[d] = r;
+ grow_dir_[d] = SMALLER;
+}
+
+IMPLEMENT_TRANSLATOR_LISTENER (New_dynamic_performer, crescendo);
+void
+New_dynamic_performer::listen_crescendo (Stream_event *r)
+{
+ Direction d = to_dir (r->get_property ("span-direction"));
+ span_events_[d] = r;
+ grow_dir_[d] = BIGGER;
+}
+
+IMPLEMENT_TRANSLATOR_LISTENER (New_dynamic_performer, absolute_dynamic);
+void
+New_dynamic_performer::listen_absolute_dynamic (Stream_event *r)
+{
+ if (!script_event_)
+ script_event_ = r;
+}
+
+ADD_TRANSLATOR (New_dynamic_performer,
+ /* doc */ "",
+ /* create */ "",
+
+ /* read */
+ "dynamicAbsoluteVolumeFunction "
+ "instrumentEqualizer "
+ "midiMaximumVolume "
+ "midiMinimumVolume "
+ "midiInstrument "
+ ,
+ /*writes*/"");