lily/include/music.hh

   1 /*
   2   music.hh -- declare Music
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9
  10
  11 #ifndef MUSIC_HH
  12 #define MUSIC_HH
  13
  14 #include "virtual-methods.hh"
  15 #include "minterval.hh"
  16 #include "lily-proto.hh"
  17 #include "string.hh"
  18 #include "smobs.hh"
  19 #include "music-constructor.hh"
  20
  21
  22 #define get_mus_property(x) internal_get_mus_property(ly_symbol2scm(x))
  23 #define set_mus_property(x,y) internal_set_mus_property(ly_symbol2scm (x), y)
  24 #define is_mus_type(x) internal_is_music_type(ly_symbol2scm (x))
  25
  26 /** Music is anything that has duration and supports both time compression and
  27   transposition.
  28
  29   In Lily, everything that can be thought to have a length and a pitch
  30  (which has a duration which can be transposed) is considered "music",
  31
  32   Music is hierarchical:
  33
  34   @see Music_sequence
  35
  36
  37   TODO: make a equalp function for general music.
  38   */
  39 class Music {
  40 public:
  41   Input *origin () const;
  42   void set_spot (Input);
  43
  44   SCM internal_get_mus_property (SCM) const;
  45   void internal_set_mus_property (SCM , SCM val);
  46   SCM get_property_alist (bool mut) const;
  47   bool internal_is_music_type (SCM) const;
  48
  49   virtual Pitch to_relative_octave (Pitch);
  50   String name ()const;
  51   /// The duration of this piece of music
  52   virtual Moment get_length () const;
  53   virtual Moment start_mom () const;
  54   void print () const;
  55   /// Transpose, with the interval central C to #p#
  56   virtual void transpose (Pitch p);
  57
  58   /// Scale the music in time by #factor#.
  59   virtual void compress (Moment factor);
  60   VIRTUAL_COPY_CONS (Music);
  61   Music ();
  62   Music (Music const &m);
  63 protected:
  64   DECLARE_SMOBS (Music,);
  65   SCM immutable_property_alist_;
  66   SCM mutable_property_alist_;
  67   friend SCM ly_extended_make_music(SCM,SCM);
  68 };
  69
  70
  71 DECLARE_UNSMOB(Music,music);
  72
  73 Music* make_music_by_name (SCM sym);
  74
  75 extern bool lily_1_8_relative;
  76
  77 #endif // MUSIC_HH