summary |
shortlog |
log |
commit | commitdiff |
tree
raw |
patch |
inline | side by side (from parent 1:
f4431e3)
This is a very convenient way to access this functionality directly
from the piano keyboard, without having to use the computer keyboard
at all.
+static void
+scherzo_set_key (scherzo_t *scherzo, pitch_t pitch)
+{
+ scherzo_key_init (&scherzo->key, pitch);
+ score_set_key (scherzo->score, pitch);
+}
+
+static bool
+pitches_are_diatonic_scale (pitch_t *pitches, int num_pitches)
+{
+ int diatonic_half_steps[7] = {
+ 0, 2, 4, 5, 7, 9, 11
+ };
+ int half_steps;
+ pitch_t root;
+ int i;
+
+ if (num_pitches < 7)
+ return 0;
+
+ root = pitches[0];
+
+ for (i = 0; i < 7; i++) {
+ half_steps = pitch_from_root_in_half_steps (pitches[i], root);
+ if (half_steps != diatonic_half_steps[i])
+ return false;
+ }
+
+ return true;
+}
+
static void
scherzo_press_note (scherzo_t *scherzo, pitch_t pitch)
{
int i;
static void
scherzo_press_note (scherzo_t *scherzo, pitch_t pitch)
{
int i;
+#define NUM_RECENT_PITCHES 7
+ static pitch_t recent_pitches[NUM_RECENT_PITCHES];
+
+ memmove (recent_pitches, recent_pitches + 1,
+ (NUM_RECENT_PITCHES - 1) * sizeof (pitch_t));
+ recent_pitches[NUM_RECENT_PITCHES - 1] = pitch;
+
+ if (pitches_are_diatonic_scale (recent_pitches, NUM_RECENT_PITCHES))
+ scherzo_set_key (scherzo, recent_pitches[0]);
+
/* Do nothing if this note is already pressed. */
for (i = 0; i < scherzo->notes_pressed.num_pitches; i++)
if (scherzo->notes_pressed.pitches[i] == pitch)
/* Do nothing if this note is already pressed. */
for (i = 0; i < scherzo->notes_pressed.num_pitches; i++)
if (scherzo->notes_pressed.pitches[i] == pitch)
scherzo.pedal_pressed = 0;
/* Default to key of C Major, naturally. */
scherzo.pedal_pressed = 0;
/* Default to key of C Major, naturally. */
- scherzo_key_init (&scherzo.key, PITCH_CLASS_LITERAL (C, NATURAL));
- score_set_key (scherzo.score, scherzo.key.pitch);
+ scherzo_set_key (&scherzo, PITCH_CLASS_LITERAL (C, NATURAL));
mnemon_init (&scherzo.mnemon);
/* XXX: Should create a default file if one cannot be loaded. */
mnemon_init (&scherzo.mnemon);
/* XXX: Should create a default file if one cannot be loaded. */