lily/performer-group-performer.cc

   1 /*
   2   performer-group-performer.cc -- implement Performer_group_performer
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1996--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7   Jan Nieuwenhuizen <janneke@gnu.org>
   8 */
   9
  10 #include "performer-group-performer.hh"
  11
  12 #include "context.hh"
  13 #include "audio-element.hh"
  14 #include "warn.hh"
  15
  16 #include "translator.icc"
  17
  18 ADD_TRANSLATOR_GROUP (Performer_group_performer,
  19                 /* descr */ "",
  20                 /* creats*/ "",
  21                 /* accepts */ "",
  22                 /* acks  */ "",
  23                 /* reads */ "",
  24                 /* write */ "");
  25
  26 void
  27 Performer_group_performer::announce_element (Audio_element_info info)
  28 {
  29   announce_infos_.push (info);
  30   Translator_group *t
  31     = context ()->get_parent_context ()->implementation ();
  32
  33   if (Performer_group_performer *eg = dynamic_cast<Performer_group_performer *> (t))
  34     eg->announce_element (info);
  35 }
  36
  37 void
  38 Performer_group_performer::acknowledge_audio_elements ()
  39 {
  40   for (int j = 0; j < announce_infos_.size (); j++)
  41     {
  42       Audio_element_info info = announce_infos_[j];
  43
  44       for (SCM p = get_simple_trans_list (); scm_is_pair (p); p = scm_cdr (p))
  45         {
  46           Translator *t = unsmob_translator (scm_car (p));
  47           Performer *eng = dynamic_cast<Performer *> (t);
  48           if (eng && eng != info.origin_trans_)
  49             eng->acknowledge_audio_element (info);
  50         }
  51     }
  52 }
  53
  54 void
  55 performer_each (SCM list, Performer_method method)
  56 {
  57   for (SCM p = list; scm_is_pair (p); p = scm_cdr (p))
  58     {
  59       Performer *e = dynamic_cast<Performer *> (unsmob_translator (scm_car (p)));
  60       if (e)
  61         (e->*method) ();
  62     }
  63 }
  64
  65 void
  66 Performer_group_performer::do_announces ()
  67 {
  68   while (1)
  69     {
  70       performer_each (get_simple_trans_list (),
  71                       &Performer::create_audio_elements);
  72
  73       if (!announce_infos_.size ())
  74         break;
  75
  76       acknowledge_audio_elements ();
  77       announce_infos_.clear ();
  78     }
  79 }
  80
  81
  82 void
  83 Performer_group_performer::play_element (Audio_element *e)
  84 {
  85   Context *c = context_->get_parent_context ();
  86   if (c)
  87     {
  88       Performer_group_performer *pgp = dynamic_cast<Performer_group_performer*> (c->implementation ());
  89       pgp->play_element (e);
  90     }
  91 }
  92
  93 int
  94 Performer_group_performer::get_tempo () const
  95 {
  96   Context *c = context_->get_parent_context ();
  97   if (c)
  98     {
  99       Performer_group_performer *pgp = dynamic_cast<Performer_group_performer*> (c->implementation ());
 100       return pgp->get_tempo ();
 101     }
 102   return 60;
 103 }
 104