lily/music-sequence.cc

   1 /*
   2   music-sequence.cc -- implement Music_sequence
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1998--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8
   9 #include "music-sequence.hh"
  10
  11 #include "warn.hh"
  12 #include "program-option.hh"
  13 #include "music.hh"
  14 #include "input.hh"
  15
  16 void
  17 transpose_music_list (SCM lst, Pitch rq)
  18 {
  19   for (SCM s = lst; scm_is_pair (s); s = scm_cdr (s))
  20     unsmob_music (scm_car (s))->transpose (rq);
  21 }
  22
  23 Moment
  24 Music_sequence::cumulative_length (SCM l)
  25 {
  26   Moment cumulative;
  27   Moment last_len;
  28
  29   for (SCM s = l; scm_is_pair (s); s = scm_cdr (s))
  30     {
  31       Moment l = unsmob_music (scm_car (s))->get_length ();
  32       if (last_len.grace_part_ && l.main_part_)
  33         last_len.grace_part_ = Rational (0);
  34       cumulative += last_len;
  35       last_len = l;
  36     }
  37
  38   last_len.grace_part_ = Rational (0);
  39   cumulative += last_len;
  40
  41   return cumulative;
  42 }
  43
  44 Moment
  45 Music_sequence::maximum_length (SCM l)
  46 {
  47   Moment dur = 0;
  48   for (SCM s = l; scm_is_pair (s); s = scm_cdr (s))
  49     {
  50       Music *m = unsmob_music (scm_car (s));
  51       if (!m)
  52         programming_error ("Music sequence should have music elements");
  53       else
  54         {
  55           Moment l = m->get_length ();
  56           dur = max (dur, l);
  57         }
  58     }
  59
  60   return dur;
  61 }
  62
  63 MAKE_SCHEME_CALLBACK (Music_sequence, maximum_length_callback, 1);
  64 SCM
  65 Music_sequence::maximum_length_callback (SCM m)
  66 {
  67   Music *me = unsmob_music (m);
  68   return maximum_length (me->get_property ("elements")).smobbed_copy ();
  69 }
  70
  71 MAKE_SCHEME_CALLBACK (Music_sequence, cumulative_length_callback, 1);
  72 SCM
  73 Music_sequence::cumulative_length_callback (SCM m)
  74 {
  75   Music *me = unsmob_music (m);
  76   return cumulative_length (me->get_property ("elements")).smobbed_copy ();
  77 }
  78
  79 MAKE_SCHEME_CALLBACK (Music_sequence, minimum_start_callback, 1);
  80 SCM
  81 Music_sequence::minimum_start_callback (SCM m)
  82 {
  83   Music *me = unsmob_music (m);
  84   return minimum_start (me->get_property ("elements")).smobbed_copy ();
  85 }
  86
  87 MAKE_SCHEME_CALLBACK (Music_sequence, first_start_callback, 1);
  88 SCM
  89 Music_sequence::first_start_callback (SCM m)
  90 {
  91   Music *me = unsmob_music (m);
  92   return first_start (me->get_property ("elements")).smobbed_copy ();
  93 }
  94
  95 Pitch
  96 music_list_to_relative (SCM l, Pitch p, bool ret_first)
  97 {
  98   Pitch first = p;
  99   int count = 0;
 100
 101   Pitch last = p;
 102   for (SCM s = l; scm_is_pair (s); s = scm_cdr (s))
 103     {
 104       if (Music *m = unsmob_music (scm_car (s)))
 105         {
 106           last = m->to_relative_octave (last);
 107           if (!count++)
 108             first = last;
 109         }
 110     }
 111
 112   return (ret_first) ? first : last;
 113 }
 114
 115 void
 116 compress_music_list (SCM l, Moment m)
 117 {
 118   for (SCM s = l; scm_is_pair (s); s = scm_cdr (s))
 119     unsmob_music (scm_car (s))->compress (m);
 120 }
 121
 122 Moment
 123 Music_sequence::minimum_start (SCM l)
 124 {
 125   Moment m;
 126
 127   for (SCM s = l; scm_is_pair (s); s = scm_cdr (s))
 128     m = min (m, unsmob_music (scm_car (s))->start_mom ());
 129   return m;
 130 }
 131
 132 Moment
 133 Music_sequence::first_start (SCM l)
 134 {
 135   Moment m;
 136
 137   for (SCM s = l; scm_is_pair (s); s = scm_cdr (s))
 138     {
 139       Music *mus = unsmob_music (scm_car (s));
 140       Moment l = mus->get_length ();
 141       Moment s = mus->start_mom ();
 142       if (l.to_bool () || s.to_bool ())
 143         return s;
 144     }
 145   return m;
 146 }
 147
 148 MAKE_SCHEME_CALLBACK (Music_sequence, simultaneous_relative_callback, 2);
 149 SCM
 150 Music_sequence::simultaneous_relative_callback (SCM music, SCM pitch)
 151 {
 152   Music *me = unsmob_music (music);
 153   Pitch p = *unsmob_pitch (pitch);
 154
 155   SCM elts = me->get_property ("elements");
 156   SCM copied = SCM_EOL;
 157   if (lily_1_8_relative)
 158     copied = ly_music_deep_copy (elts);
 159
 160   Pitch retval = music_list_to_relative (elts, p, false);
 161
 162   if (lily_1_8_relative)
 163     {
 164
 165       Pitch retval_1_8 = music_list_to_relative (copied, p, true);
 166       if (retval_1_8 != retval)
 167         lily_1_8_compatibility_used = true;
 168
 169       retval = retval_1_8;
 170     }
 171
 172   return retval.smobbed_copy ();
 173 }
 174
 175 MAKE_SCHEME_CALLBACK (Music_sequence, event_chord_relative_callback, 2);
 176 SCM
 177 Music_sequence::event_chord_relative_callback (SCM music, SCM pitch)
 178 {
 179   Music *me = unsmob_music (music);
 180   Pitch p = *unsmob_pitch (pitch);
 181   return music_list_to_relative (me->get_property ("elements"),
 182                                  p, true).smobbed_copy ();
 183 }
 184