lily/staff-performer.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 1997--2011 Jan Nieuwenhuizen <janneke@gnu.org>
   5
   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.
  10
  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.
  15
  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/>.
  18 */
  19
  20 #include <map>
  21
  22 #include "audio-column.hh"
  23 #include "audio-item.hh"
  24 #include "audio-staff.hh"
  25 #include "context.hh"
  26 #include "international.hh"
  27 #include "performer-group.hh"
  28 #include "warn.hh"
  29
  30 /* Perform a staff. Individual notes should have their instrument
  31   (staff-wide) set, so we override play_element ()
  32 */
  33 class Staff_performer : public Performer
  34 {
  35 public:
  36   TRANSLATOR_DECLARATIONS (Staff_performer);
  37   ~Staff_performer ();
  38
  39 protected:
  40   virtual void acknowledge_audio_element (Audio_element_info info);
  41   virtual void finalize ();
  42   virtual void initialize ();
  43   void process_music ();
  44   void stop_translation_timestep ();
  45
  46 private:
  47   string new_instrument_string ();
  48   void set_instrument_name (string voice);
  49   void set_instrument (int channel, string voice);
  50   int get_channel (string instrument);
  51   Audio_staff* get_audio_staff (string voice);
  52   Audio_staff* new_audio_staff (string voice);
  53   Real get_dynamic (string voice);
  54
  55   string instrument_string_;
  56   int channel_;
  57   Audio_instrument *instrument_;
  58   Audio_text *instrument_name_;
  59   Audio_text *name_;
  60   Audio_tempo *tempo_;
  61   map<string, Audio_staff*> staff_map_;
  62   map<string, int> channel_map_;
  63   map<string, Real> dynamic_map_;
  64   static map<string, int> static_channel_map_;
  65   static int channel_count_;
  66 };
  67
  68 map<string, int> Staff_performer::static_channel_map_;
  69 int Staff_performer::channel_count_ = 0;
  70
  71 #include "translator.icc"
  72
  73 ADD_TRANSLATOR (Staff_performer,
  74                 /* doc */
  75                 "",
  76
  77                 /* create */
  78                 "",
  79
  80                 /* read */
  81                 "",
  82
  83                 /* write */
  84                 "");
  85
  86 Staff_performer::Staff_performer ()
  87   : channel_ (0)
  88   , instrument_ (0)
  89   , instrument_name_ (0)
  90   , name_ (0)
  91   , tempo_ (0)
  92 {
  93 }
  94
  95 Staff_performer::~Staff_performer ()
  96 {
  97 }
  98
  99 void
 100 Staff_performer::initialize ()
 101 {
 102 }
 103
 104 Audio_staff*
 105 Staff_performer::new_audio_staff (string voice)
 106 {
 107   Audio_staff* audio_staff = new Audio_staff;
 108   string track_name = context ()->id_string () + ":" + voice;
 109   if (track_name != ":")
 110     {
 111       name_ = new Audio_text (Audio_text::TRACK_NAME, context ()->id_string ()
 112                               + ":" + voice);
 113       audio_staff->add_audio_item (name_);
 114       announce_element (Audio_element_info (name_, 0));
 115     }
 116   announce_element (Audio_element_info (audio_staff, 0));
 117   staff_map_[voice] = audio_staff;
 118   if (!instrument_string_.empty ())
 119     set_instrument (channel_, voice);
 120   return audio_staff;
 121 }
 122
 123 Audio_staff*
 124 Staff_performer::get_audio_staff (string voice)
 125 {
 126   SCM channel_mapping = get_property ("midiChannelMapping");
 127   if (channel_mapping != ly_symbol2scm ("instrument")
 128       && staff_map_.size ())
 129     return staff_map_.begin ()->second;
 130
 131   map<string, Audio_staff*>::const_iterator i = staff_map_.find (voice);
 132   if (i != staff_map_.end ())
 133     return i->second;
 134   map<string, Audio_staff*>::const_iterator e = staff_map_.find ("");
 135   if (staff_map_.size () == 1 && e != staff_map_.end ())
 136     {
 137       staff_map_[voice] = e->second;
 138       return e->second;
 139     }
 140   return new_audio_staff (voice);
 141 }
 142
 143 Real
 144 Staff_performer::get_dynamic (string voice)
 145 {
 146   map<string, Real>::const_iterator i = dynamic_map_.find (voice);
 147   if (i != dynamic_map_.end ())
 148     return i->second;
 149   return 0;
 150 }
 151
 152 void
 153 Staff_performer::process_music ()
 154 {
 155 }
 156
 157 void
 158 Staff_performer::set_instrument (int channel, string voice)
 159 {
 160   instrument_ = new Audio_instrument (instrument_string_);
 161   instrument_->channel_ = channel;
 162   announce_element (Audio_element_info (instrument_, 0));
 163   Audio_staff* audio_staff = get_audio_staff (voice);
 164   audio_staff->add_audio_item (instrument_);
 165   SCM proc = ly_lily_module_constant ("percussion?");
 166   SCM drums = scm_call_1 (proc, ly_symbol2scm (instrument_string_.c_str ()));
 167   audio_staff->percussion_ = (drums == SCM_BOOL_T);
 168 }
 169
 170 void
 171 Staff_performer::set_instrument_name (string voice)
 172 {
 173   instrument_name_ = new Audio_text (Audio_text::INSTRUMENT_NAME,
 174                                      instrument_string_);
 175   announce_element (Audio_element_info (instrument_name_, 0));
 176   get_audio_staff (voice)->add_audio_item (instrument_name_);
 177 }
 178
 179 void
 180 Staff_performer::stop_translation_timestep ()
 181 {
 182   name_ = 0;
 183   tempo_ = 0;
 184   instrument_name_ = 0;
 185   instrument_ = 0;
 186 }
 187
 188 void
 189 Staff_performer::finalize ()
 190 {
 191   staff_map_.clear ();
 192   channel_map_.clear ();
 193 }
 194
 195 string
 196 Staff_performer::new_instrument_string ()
 197 {
 198   // mustn't ask Score for instrument: it will return piano!
 199   SCM minstr = get_property ("midiInstrument");
 200
 201   if (!scm_is_string (minstr)
 202       || ly_scm2string (minstr) == instrument_string_)
 203     return "";
 204
 205   instrument_string_ = ly_scm2string (minstr);
 206
 207   return instrument_string_;
 208 }
 209
 210 int
 211 Staff_performer::get_channel (string instrument)
 212 {
 213   SCM channel_mapping = get_property ("midiChannelMapping");
 214   map<string, int>& channel_map
 215     = (channel_mapping != ly_symbol2scm ("instrument"))
 216     ? channel_map_
 217     : static_channel_map_;
 218
 219   map<string, int>::const_iterator i = channel_map.find (instrument);
 220   if (i != channel_map.end ())
 221     return i->second;
 222
 223   int channel = (channel_mapping == ly_symbol2scm ("staff"))
 224     ? channel_count_++
 225     : channel_map.size ();
 226
 227   /* MIDI players tend to ignore instrument settings on channel
 228      10, the percussion channel.  */
 229   if (channel % 16 == 9)
 230     {
 231       channel_map["percussion"] = channel++;
 232       channel_count_++;
 233     }
 234
 235   if (channel > 15)
 236     {
 237       warning (_ ("MIDI channel wrapped around"));
 238       warning (_ ("remapping modulo 16"));
 239       channel = channel % 16;
 240     }
 241
 242   channel_map[instrument] = channel;
 243   return channel;
 244 }
 245
 246 void
 247 Staff_performer::acknowledge_audio_element (Audio_element_info inf)
 248 {
 249   if (Audio_item *ai = dynamic_cast<Audio_item *> (inf.elem_))
 250     {
 251       /* map each context (voice) to its own track */
 252       Context* c = inf.origin_contexts (this)[0];
 253       string voice;
 254       if (c->is_alias (ly_symbol2scm ("Voice")))
 255         voice = c->id_string ();
 256       SCM channel_mapping = get_property ("midiChannelMapping");
 257       if (channel_mapping == ly_symbol2scm ("voice"))
 258         channel_ = get_channel (voice);
 259       string str = new_instrument_string ();
 260       if (str.length ())
 261         {
 262           if (channel_mapping != ly_symbol2scm ("voice"))
 263             channel_ = get_channel (str);
 264           set_instrument (channel_, voice);
 265           set_instrument_name (voice);
 266         }
 267       Audio_staff* audio_staff = get_audio_staff (voice);
 268       ai->channel_ = channel_;
 269       // Output volume as velocity and disable Midi_dynamic output
 270       if (Audio_dynamic *d = dynamic_cast<Audio_dynamic *> (inf.elem_))
 271         {
 272           dynamic_map_[voice] = d->volume_;
 273           d->volume_ = -1;
 274         }
 275       if (Real d = get_dynamic (voice))
 276         if (Audio_note *n = dynamic_cast<Audio_note *> (inf.elem_))
 277           n->volume_ = d;
 278       audio_staff->add_audio_item (ai);
 279     }
 280 }
 281