-/*
- duration-convert.hh -- declare
-
- source file of the LilyPond music typesetter
-
- (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
-*/
-
-
-#ifndef DURATION_CONVERT_HH
-#define DURATION_CONVERT_HH
-#include "duration.hh"
-#include "string.hh"
-//#include "array.hh"
-#include "varray.hh"
-
-/**
- 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().
-
- [todo]
- move all statics to real members, instantiate Duration_convert
- object(s).
-*/
-struct Duration_convert {
-
- /* Urgh. statics.
- */
- static bool const midi_as_plet_b_s = true;
- static bool no_quantify_b_s;
- static bool no_double_dots_b_s;
- static bool no_triplets_b_s;
- static int no_smaller_than_i_s;
- static Array<Duration> dur_array_s;
-
-// /// 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 number of ticks in (ticks, division_1) representation
- static int dur2ticks_i( Duration dur );
-
- /// Return the type_i representation of note length i
- static int i2_type(int i);
-
- /// Return the note length corresponding to the type_i representation
- /// Return 0 if longer than whole note.
- static int type2_i(int type);
-
- /// 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 duration from Moment (fraction of whole) representation.
- static Duration mom2_dur( Moment mom );
-
- /// Return standardised duration, best guess if not exact.
- static Duration mom2standardised_dur( Moment mom );
-
- /// Return plet factor (not a Moment: should use Rational?).
- static Moment plet_factor_mom( Duration dur );
-
- static void set_array();
-
- /** 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 );
-
- /// Return exact duration, in midi-ticks if not-exact.
- static Duration ticks2_dur( int ticks_i );
-
- /// Return standardised duration, best guess if not exact.
- static Duration ticks2standardised_dur( int ticks_i );
-};
-
-/// (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_;
-};
-
-
-#endif // DURATION_CONVERT_HH
projects / lilypond.git / blobdiff