lily/include/music.hh

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 1997--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
   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 #ifndef MUSIC_HH
  21 #define MUSIC_HH
  22
  23 #include "smobs.hh"
  24 #include "moment.hh"
  25 #include "pitch.hh"
  26 #include "prob.hh"
  27
  28 #define is_mus_type(x) internal_is_music_type (ly_symbol2scm (x))
  29
  30 class Music : public Prob
  31 {
  32 public:
  33   Music (SCM init);
  34   Music (Music const &m);
  35   VIRTUAL_COPY_CONSTRUCTOR (Music, Music);
  36
  37   Input *origin () const;
  38   void set_spot (Input);
  39
  40   bool internal_is_music_type (SCM) const;
  41
  42   Stream_event *to_event () const;
  43
  44   DECLARE_SCHEME_CALLBACK (relative_callback, (SCM, SCM));
  45   Pitch to_relative_octave (Pitch);
  46   Pitch generic_to_relative_octave (Pitch);
  47   Moment get_length () const;
  48   Moment start_mom () const;
  49   void print () const;
  50
  51   /// Transpose, with the interval central C to #p#
  52   void transpose (Pitch p);
  53
  54   /// Scale the music in time by #factor#.
  55   void compress (Moment factor);
  56
  57   // Broadcast the event in a context's event-source.
  58   void send_to_context (Context *c);
  59
  60   DECLARE_SCHEME_CALLBACK (duration_length_callback, (SCM));
  61
  62 protected:
  63   virtual SCM copy_mutable_properties () const;
  64   virtual void type_check_assignment (SCM, SCM) const;
  65   virtual void derived_mark () const;
  66 protected:
  67   SCM length_callback_;
  68   SCM start_callback_;
  69   friend SCM ly_extended_make_music (SCM, SCM);
  70 };
  71
  72 Music *unsmob_music (SCM);
  73 Music *make_music_by_name (SCM sym);
  74 SCM ly_music_deep_copy (SCM);
  75 SCM ly_camel_case_2_lisp_identifier (SCM name_sym);
  76
  77 extern SCM ly_music_p_proc;
  78
  79 /* common transposition function for music and event */
  80 void transpose_mutable (SCM alist, Pitch delta);
  81
  82 #endif /* MUSIC_HH */