-//
-// duration.hh -- declare Duration, Plet, Duration_convert Duration_iterator
-//
-// copyright 1997 Jan Nieuwenhuizen <jan@digicash.com>
+/*
+ duration.hh -- declare Duration Plet
+
+ source file of the LilyPond music typesetter
+
+ (c) 1997 Jan Nieuwenhuizen <jan@digicash.com>
+
+*/
// split into 4?
#ifndef DURATION_HH
#define DURATION_HH
+#include "fproto.hh"
+#include "moment.hh"
+
// ugh, to get me in lily lib
extern bool no_triplets_bo_g;
-/// (dur)
-struct Duration {
- // actually i hate it when other people use default arguments,
- // because it makes you easily loose track of what-s really
- // happening; in the routine-s implementation you-re not aware
- // of this defaultness (who sets this stupid value?).
- Duration( int type_i = 1, int dots_i = 0, Plet* plet_p = 0 );
- Duration( Duration const& dur_c_r );
- ~Duration();
-
- Duration const& operator =( Duration const& dur_c_r );
-
- void set_plet( Plet* plet_l ); // handiger: newt zelf
-
-// int i_; // balltype -> type!
- int type_i_;
- int dots_i_;
- Plet* plet_p_;
-};
-
-/// (plet)
+/** (plet)
+ The type and replacement value of a plet (triplet, quintuplet.) Conceptually the same as a rational, but 4/6 != 2/3
+ */
struct Plet {
- Plet( int replace_i, int type_i );
- Plet( Plet const& plet_c_r );
-
-// int i_;
- int iso_i_; // 2/3; 2 is not duration, maar of count!
- int type_i_;
+ Plet( int replace_i, int type_i );
+ Plet();
+ Moment mom()const;
+ bool unit_b()const;
+ int iso_i_; // 2/3; 2 is not duration, maar of count!
+ int type_i_;
};
/**
- Duration_convert handles all conversions to -n fro Duration (dur).
- That is including (integer + division) representation for MIDI,
- and conversion from unexact time representation (best guess :-).
-
- A Moment (mom) is a Rational that holds the time fraction
- compared to a whole note (before also called wholes).
-
- SUGGESTION: currently a moment in time is called moment too;
- let-s typedef Rational When too, so that we get
- When Staff_column::when(), Moment Voice_element::mom().
-*/
-struct Duration_convert {
- /// Most used division in MIDI, all fine with me.
- static int const division_1_c_i = 384;
-
- /// Return (integer, division) representation.
- static int dur2_i( Duration dur, int division_1_i = division_1_c_i );
-
- /// Return Moment representation (fraction of whole note).
- static Moment dur2_mom( Duration dur );
-
- /// Return Mudela string representation.
- static String dur2_str( Duration dur );
-
- /// Return Moment from (integer, division) representation.
- static Moment i2_mom( int i, int division_1_i = division_1_c_i );
-
- /// Return Moment (fraction of whole) representation, best guess.
- static Duration mom2_dur( Moment mom );
-
- /// Return plet factor (not a Moment: should use Rational?).
- static Moment plet_factor_mom( Duration dur );
-
- /** Return synchronisation factor for mom, so that
- mom2_dur( mom / sync_f ) will return the duration dur.
- */
- static Real sync_f( Duration dur, Moment mom );
-};
-
-/// (iter_dur)
-struct Duration_iterator {
- /// start at shortest: 128:2/3
- Duration_iterator();
-
- // **** what about these three here ?
- /// return forward_dur();
- Duration operator ++(int);
-
- /// return ok()
- operator bool();
-
- /// return dur()
- Duration operator ()();
- // ****
-
- /// return current dur
- Duration dur();
-
- /// return dur(), step to next
- Duration forward_dur();
-
- /// durations left?
- bool ok();
-
-private:
- Duration cursor_dur_;
+ Class to handle "musical" durations. This means: balltype 1,2,4,etc. and dots.
+
+ (dur)
+ */
+struct Duration {
+ /**
+ Ctor of Duration. type_i should be a power of 2.
+ */
+ Duration( int type_i = 1, int dots_i = 0);
+ /// is the "plet factor" of this note != 1 ?
+ bool plet_b();
+ String str()const;
+ void set_plet(int,int );
+ void set_plet(Duration );
+ static bool duration_type_b(int t);
+ void set_ticks( int ticks_i );
+ Moment length() const ; // zo naai mij
+ static int division_1_i_s;
+ int type_i_;
+ int dots_i_;
+ Plet plet_;
+ int ticks_i_;
};
-
#endif // DURATION_HH
projects / lilypond.git / blobdiff