--- /dev/null
+/*
+ This file is part of LilyPond, the GNU music typesetter.
+
+ Copyright (C) 2013 by Heikki Tauriainen <g034737@welho.com>.
+ Adapted from performer implementations
+ Copyright (C) 1996--2012 Jan Nieuwenhuizen <janneke@gnu.org>,
+ Han-Wen Nienhyus <hanwen@xs4all.nl> and others.
+
+ LilyPond is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ LilyPond is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "performer.hh"
+
+#include "audio-item.hh"
+#include "context.hh"
+#include "dispatcher.hh"
+#include "international.hh"
+#include "listener.hh"
+#include "stream-event.hh"
+
+#include "translator.icc"
+
+/**
+ MIDI control function performer. Announces "set property" events on MIDI
+ context properties.
+*/
+class Midi_control_function_performer : public Performer
+{
+public:
+ TRANSLATOR_DECLARATIONS (Midi_control_function_performer);
+ DECLARE_LISTENER (announce_function_value_change);
+ ~Midi_control_function_performer ();
+
+ void connect_to_context (Context *c);
+ void disconnect_from_context (Context *c);
+};
+
+Midi_control_function_performer::Midi_control_function_performer ()
+{
+}
+
+Midi_control_function_performer::~Midi_control_function_performer ()
+{
+}
+
+void
+Midi_control_function_performer::connect_to_context (Context *c)
+{
+ c->events_below ()->
+ add_listener (GET_LISTENER (announce_function_value_change),
+ ly_symbol2scm ("SetProperty"));
+}
+
+void
+Midi_control_function_performer::disconnect_from_context (Context *c)
+{
+ c->events_below ()->
+ remove_listener (GET_LISTENER (announce_function_value_change),
+ ly_symbol2scm ("SetProperty"));
+}
+
+IMPLEMENT_LISTENER (Midi_control_function_performer,
+ announce_function_value_change)
+void
+Midi_control_function_performer::announce_function_value_change (SCM sev)
+{
+ Stream_event *ev = unsmob_stream_event (sev);
+ SCM sym = ev->get_property ("symbol");
+ if (!scm_is_symbol (sym))
+ return;
+
+ // Search for a matching context property; if found, check that the value
+ // of the property is within the allowed range, and announce a possible
+ // change in the value of the corresponding control function.
+ string symbol = ly_symbol2string (sym);
+ for (const Audio_control_function_value_change::Context_property *p
+ = Audio_control_function_value_change::context_properties_;
+ p->name_; ++p)
+ {
+ if (symbol == p->name_)
+ {
+ SCM value = ev->get_property ("value");
+ if (scm_is_number (value))
+ {
+ Real val = scm_to_double (value);
+ if (val >= p->range_min_ && val <= p->range_max_)
+ {
+ // Normalize the value to the 0.0 to 1.0 range.
+ val = ((val - p->range_min_)
+ / (p->range_max_ - p->range_min_));
+ Audio_control_function_value_change *item
+ = new Audio_control_function_value_change (p->control_,
+ val);
+ announce_element (Audio_element_info (item, 0));
+ }
+ else
+ ev->origin ()->
+ warning (_f ("ignoring out-of-range value change for MIDI "
+ "property `%s'",
+ p->name_));
+ }
+ break;
+ }
+ }
+}
+
+ADD_TRANSLATOR (Midi_control_function_performer,
+ /* doc */
+ "",
+
+ /* create */
+ "",
+
+ /* read */
+ "midiBalance "
+ "midiPanPosition "
+ "midiReverbLevel "
+ "midiChorusLevel ",
+
+ /* write */
+ ""
+ );
staff_map_[voice] = audio_staff;
if (!instrument_string_.empty ())
set_instrument (channel_, voice);
+ // Set initial values (if any) for control functions.
+ for (const Audio_control_function_value_change::Context_property *p
+ = Audio_control_function_value_change::context_properties_;
+ p->name_; ++p)
+ {
+ SCM value = get_property (p->name_);
+ if (scm_is_number (value))
+ {
+ Real val = scm_to_double (value);
+ if (val >= p->range_min_ && val <= p->range_max_)
+ {
+ // Normalize the value to the 0.0 to 1.0 range.
+ val = ((val - p->range_min_)
+ / (p->range_max_ - p->range_min_));
+ Audio_control_function_value_change *item
+ = new Audio_control_function_value_change (p->control_, val);
+ item->channel_ = channel_;
+ audio_staff->add_audio_item (item);
+ announce_element (Audio_element_info (item, 0));
+ }
+ else
+ warning (_f ("ignoring out-of-range value change for MIDI "
+ "property `%s'",
+ p->name_));
+ }
+ }
return audio_staff;
}
(midiMinimumVolume ,number? "Set the minimum loudness for MIDI.
Ranges from 0 to@tie{}1.")
(midiChannelMapping ,symbol? "How to map MIDI channels: per @code{instrument} (default), @code{staff} or @code{voice}.")
+ (midiBalance ,number? "Stereo balance for the MIDI channel
+associated with the current context. Ranges from@tie{}@w{-1} to@tie{}1,
+where the values@tie{}@w{-1} (@code{#LEFT}),@tie{}0 (@code{#CENTER})
+and@tie{}1 (@code{#RIGHT}) correspond to leftmost emphasis, center
+balance, and rightmost emphasis, respectively.")
+ (midiPanPosition ,number? "Pan position for the MIDI channel
+associated with the current context. Ranges from@tie{}@w{-1} to@tie{}1,
+where the values@tie{}@w{-1} (@code{#LEFT}),@tie{}0 (@code{#CENTER})
+and@tie{}1 (@code{#RIGHT}) correspond to hard left, center, and hard
+right, respectively.")
+ (midiReverbLevel ,number? "Reverb effect level for the MIDI channel
+associated with the current context. Ranges from 0 to@tie{}1
+(0=off,@tie{}1=full effect).")
+ (midiChorusLevel ,number? "Chorus effect level for the MIDI channel
+associated with the current context. Ranges from 0 to@tie{}1
+(0=off,@tie{}1=full effect).")
(minimumFret ,number? "The tablature auto string-selecting
mechanism selects the highest string with a fret at least
@code{minimumFret}.")
projects / lilypond.git / commitdiff