/*
- staff-performer.cc -- implement Staff_performer
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
+ Copyright (C) 1997--2011 Jan Nieuwenhuizen <janneke@gnu.org>
- (c) 1997--2006 Jan Nieuwenhuizen <janneke@gnu.org>
+ 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 <map>
+
#include "warn.hh"
#include "audio-column.hh"
#include "audio-item.hh"
#include "performer-group.hh"
#include "context.hh"
-/** Perform a staff. Individual notes should have their instrument
- (staff-wide) set, so we override play_element ()
+/* Perform a staff. Individual notes should have their instrument
+ (staff-wide) set, so we override play_element ()
*/
class Staff_performer : public Performer
{
virtual void initialize ();
void process_music ();
void stop_translation_timestep ();
+ void set_instrument_name ();
+ void set_instrument (int channel);
private:
Audio_staff *audio_staff_;
Audio_text *instrument_name_;
Audio_text *name_;
Audio_tempo *tempo_;
+ map<string, int> channel_map_;
};
#include "translator.icc"
-ADD_TRANSLATOR (Staff_performer, "", "",
- "", "");
+ADD_TRANSLATOR (Staff_performer,
+ /* doc */
+ "",
+
+ /* create */
+ "",
+
+ /* read */
+ "",
+
+ /* write */
+ "");
Staff_performer::Staff_performer ()
{
string str = new_instrument_string ();
if (str.length ())
{
- instrument_name_ = new Audio_text (Audio_text::INSTRUMENT_NAME, str);
- announce_element (Audio_element_info (instrument_name_, 0));
- instrument_ = new Audio_instrument (str);
- announce_element (Audio_element_info (instrument_, 0));
-
- audio_staff_->add_audio_item (instrument_);
- audio_staff_->add_audio_item (instrument_name_);
-
- /*
- Have to be here before notes arrive into the staff.
- */
+ set_instrument (0);
+ set_instrument_name ();
}
}
+void
+Staff_performer::set_instrument (int channel)
+{
+ instrument_ = new Audio_instrument (instrument_string_);
+ instrument_->channel_ = channel;
+ announce_element (Audio_element_info (instrument_, 0));
+ audio_staff_->add_audio_item (instrument_);
+}
+
+void
+Staff_performer::set_instrument_name ()
+{
+ instrument_name_ = new Audio_text (Audio_text::INSTRUMENT_NAME,
+ instrument_string_);
+ announce_element (Audio_element_info (instrument_name_, 0));
+ audio_staff_->add_audio_item (instrument_name_);
+}
+
void
Staff_performer::stop_translation_timestep ()
{
SCM proc = ly_lily_module_constant ("percussion?");
-
SCM drums = scm_call_1 (proc, ly_symbol2scm (instrument_string_.c_str ()));
- audio_staff_->channel_ = (drums == SCM_BOOL_T ? 9 : -1);
- if (name_)
- {
- name_ = 0;
- }
- if (tempo_)
- {
- tempo_ = 0;
- }
+ audio_staff_->percussion_ = (drums == SCM_BOOL_T);
+
+ name_ = 0;
+ tempo_ = 0;
instrument_name_ = 0;
instrument_ = 0;
}
Staff_performer::acknowledge_audio_element (Audio_element_info inf)
{
if (Audio_item *ai = dynamic_cast<Audio_item *> (inf.elem_))
- audio_staff_->add_audio_item (ai);
+ {
+ /* map each context (voice) to its own channel */
+ Context *c = inf.origin_contexts (this)[0];
+ string id = c->id_string ();
+ int channel = channel_map_.size ();
+ /* MIDI players tend to ignore instrument settings on channel
+ 10, the percussion channel. */
+ if (channel % 16 == 9)
+ channel_map_[""] = channel++;
+
+ map<string, int>::const_iterator i = channel_map_.find (id);
+ if (i != channel_map_.end ())
+ channel = i->second;
+ else
+ {
+ channel_map_[id] = channel;
+ if (channel)
+ set_instrument (channel);
+ }
+
+ ai->channel_ = channel;
+ audio_staff_->add_audio_item (ai);
+ }
}