#include "score.h"
#include "mnemon.h"
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof(arr[0]))
+
#define unused(foo) foo __attribute__((unused))
#define MIDI_BUF_SIZE 4096
int staff_height;
score_staff_t *treble;
score_staff_t *bass;
+ score_chord_t *chord;
int midi_fd;
snd_midi_event_t *snd_midi_event;
score_note_t **notes_pressed;
} scherzo_t;
+/* Forward declarations. */
+static score_note_t *
+scherzo_add_note (scherzo_t *scherzo, score_pitch_t pitch, int octave);
+
+static void
+scherzo_remove_note (scherzo_t *scherzo, score_pitch_t pitch, int octave);
+
+static void
+_judge_note (scherzo_t *scherzo, score_note_t *note);
+
+static void
+_score_challenge (scherzo_t *scherzo);
+
static int
on_delete_event_quit (unused (GtkWidget *widget),
unused (GdkEvent *event),
void *user_data)
{
scherzo_t *scherzo = user_data;
+ int octave;
+ score_pitch_t pitch;
+
+ if (scherzo->challenge.note)
+ octave = scherzo->challenge.note->octave;
+ else
+ octave = 4;
switch (key->keyval) {
case GDK_KEY_plus:
case GDK_KEY_Escape:
gtk_main_quit ();
return FALSE;
+ case GDK_KEY_c:
+ case GDK_KEY_C:
+ pitch = SCORE_PITCH_C;
+ break;
+ case GDK_KEY_d:
+ case GDK_KEY_D:
+ pitch = SCORE_PITCH_D;
+ break;
+ case GDK_KEY_e:
+ case GDK_KEY_E:
+ pitch = SCORE_PITCH_E;
+ break;
+ case GDK_KEY_f:
+ case GDK_KEY_F:
+ pitch = SCORE_PITCH_F;
+ break;
+ case GDK_KEY_g:
+ case GDK_KEY_G:
+ pitch = SCORE_PITCH_G;
+ break;
+ case GDK_KEY_a:
+ case GDK_KEY_A:
+ pitch = SCORE_PITCH_A;
+ break;
+ case GDK_KEY_b:
+ case GDK_KEY_B:
+ pitch = SCORE_PITCH_B;
+ break;
}
- /* Allow the event to propagate to other handlers. */
+ if ((key->keyval >= GDK_KEY_A && key->keyval <= GDK_KEY_G) ||
+ (key->keyval >= GDK_KEY_a && key->keyval <= GDK_KEY_g))
+ {
+ score_note_t *note;
+
+ note = scherzo_add_note (scherzo, pitch, octave);
+ _judge_note (scherzo, note);
+ gtk_widget_queue_draw (scherzo->window);
+
+ return TRUE;
+ }
+
+
+ /* Allow an unhandled event to propagate to other handlers. */
return FALSE;
}
+static int
+on_key_release_event (unused (GtkWidget *widget),
+ GdkEventKey *key,
+ void *user_data)
+{
+ scherzo_t *scherzo = user_data;
+ int octave;
+ score_pitch_t pitch;
+
+ if (scherzo->challenge.note)
+ octave = scherzo->challenge.note->octave;
+ else
+ octave = 4;
+
+ switch (key->keyval) {
+ case GDK_KEY_c:
+ case GDK_KEY_C:
+ pitch = SCORE_PITCH_C;
+ break;
+ case GDK_KEY_d:
+ case GDK_KEY_D:
+ pitch = SCORE_PITCH_D;
+ break;
+ case GDK_KEY_e:
+ case GDK_KEY_E:
+ pitch = SCORE_PITCH_E;
+ break;
+ case GDK_KEY_f:
+ case GDK_KEY_F:
+ pitch = SCORE_PITCH_F;
+ break;
+ case GDK_KEY_g:
+ case GDK_KEY_G:
+ pitch = SCORE_PITCH_G;
+ break;
+ case GDK_KEY_a:
+ case GDK_KEY_A:
+ pitch = SCORE_PITCH_A;
+ break;
+ case GDK_KEY_b:
+ case GDK_KEY_B:
+ pitch = SCORE_PITCH_B;
+ break;
+ }
+
+ if ((key->keyval >= GDK_KEY_A && key->keyval <= GDK_KEY_G) ||
+ (key->keyval >= GDK_KEY_a && key->keyval <= GDK_KEY_g))
+ {
+ scherzo_remove_note (scherzo, pitch, octave);
+ _score_challenge (scherzo);
+ gtk_widget_queue_draw (scherzo->window);
+
+ return TRUE;
+ }
+
+
+ /* Allow an unhandled event to propagate to other handlers. */
+ return FALSE;
+}
+
+static unsigned char
+_score_pitch_and_octave_to_midi (score_pitch_t pitch,
+ int octave)
+{
+ unsigned char midi_note = 12 * (octave + 1);
+
+ switch (SCORE_PITCH_NAME (pitch)) {
+ case SCORE_PITCH_NAME_C:
+ break;
+ case SCORE_PITCH_NAME_D:
+ midi_note += 2;
+ break;
+ case SCORE_PITCH_NAME_E:
+ midi_note += 4;
+ break;
+ case SCORE_PITCH_NAME_F:
+ midi_note += 5;
+ break;
+ case SCORE_PITCH_NAME_G:
+ midi_note += 7;
+ break;
+ case SCORE_PITCH_NAME_A:
+ midi_note += 9;
+ break;
+ case SCORE_PITCH_NAME_B:
+ midi_note += 11;
+ break;
+ }
+
+ switch (SCORE_PITCH_ACCIDENTAL (pitch)) {
+ case SCORE_PITCH_ACCIDENTAL_DOUBLE_FLAT:
+ midi_note -= 2;
+ break;
+ case SCORE_PITCH_ACCIDENTAL_FLAT:
+ midi_note -= 1;
+ break;
+ case SCORE_PITCH_ACCIDENTAL_NATURAL:
+ break;
+ case SCORE_PITCH_ACCIDENTAL_SHARP:
+ midi_note += 1;
+ break;
+ case SCORE_PITCH_ACCIDENTAL_DOUBLE_SHARP:
+ midi_note += 2;
+ break;
+ }
+
+ return midi_note;
+}
+
static void
_midi_to_score_pitch_and_octave (unsigned char midi_note,
score_pitch_t *pitch,
}
}
+/* Determine a chord name (if any) from the current notes pressed */
+
+typedef struct analyzed_note {
+ /* Original note being analzyed. */
+ score_note_t *note;
+
+ /* Absolute pitch (expressed as midi number). */
+ int midi_pitch;
+
+ /* Pitch relative to bass note. */
+ int relative_pitch;
+} analyzed_note_t;
+
+static int
+_compare_analyzed_note (const void *va, const void *vb)
+{
+ const analyzed_note_t *a = va, *b = vb;
+
+ return a->midi_pitch - b->midi_pitch;
+}
+
+static int
+_chord_signature_matches (analyzed_note_t *notes,
+ int num_notes,
+ int *signature_pitches,
+ int num_signature_pitches)
+{
+ int n, s;
+
+ for (n = 0, s = 0; s < num_signature_pitches; s++) {
+ if (n >= num_notes)
+ return 0;
+ if (notes[n].relative_pitch != signature_pitches[s])
+ return 0;
+ n++;
+ /* Skip repeated notes in chord being tested. */
+ while (n < num_notes &&
+ notes[n].relative_pitch == signature_pitches[s])
+ {
+ n++;
+ }
+ }
+
+ /* If there are fewer notes in the signature than in the chord,
+ * then there is no match. */
+ if (n < num_notes)
+ return 0;
+
+ return 1;
+}
+
+static void
+scherzo_analyze_chord (scherzo_t *scherzo)
+{
+ void *local = talloc_new (NULL);
+ analyzed_note_t *notes;
+ unsigned i, num_notes = scherzo->num_notes_pressed;
+ int bass_pitch;
+ const char *chord_name = NULL;
+
+ struct { int pitches[2]; const char *name; } intervals[] = {
+ { {0, 1}, "Minor 2nd"},
+ { {0, 2}, "Major 2nd"},
+ { {0, 3}, "Minor 3rd"},
+ { {0, 4}, "Major 3rd"},
+ { {0, 5}, "Perfect 4th"},
+ { {0, 6}, "Diminished 5th/Augmented 4th"},
+ { {0, 7}, "Perfect 5th"},
+ { {0, 8}, "Minor 6th"},
+ { {0, 9}, "Major 6th"},
+ { {0, 10}, "Minor 7th"},
+ { {0, 11}, "Major 7th"}
+ };
+
+ struct { int pitches[3]; const char *name; } triads[] = {
+ { {0, 4, 8}, "Augmented triad" },
+ { {0, 4, 7}, "Major triad" },
+ { {0, 3, 7}, "Minor triad" },
+ { {0, 3, 6}, "Diminished triad" }
+ };
+
+ struct { int pitches[4]; const char *name; } sevenths[] = {
+ { {0, 4, 8, 11}, "Augmented/major 7" },
+ { {0, 4, 7, 11}, "Major 7" },
+ { {0, 4, 7, 10}, "Dominant 7" },
+ { {0, 3, 7, 11}, "Minor/major 7" },
+ { {0, 3, 7, 10}, "Minor 7" },
+ { {0, 3, 6, 10}, "Half-diminished 7" },
+ { {0, 3, 6, 9}, "Diminished 7" },
+ { {0, 4, 8, 10}, "Augmented 7" },
+ { {0, 3, 6, 11}, "Diminished/major 7" },
+ };
+
+ if (scherzo->chord) {
+ score_remove_chord (scherzo->chord);
+ scherzo->chord = NULL;
+ }
+
+ if (num_notes == 0)
+ goto DONE;
+
+ notes = talloc_array (local, analyzed_note_t, num_notes);
+ if (notes == NULL)
+ goto DONE;
+
+ for (i = 0; i < num_notes; i++) {
+ score_note_t *note = scherzo->notes_pressed[i];
+ notes[i].note = note;
+ notes[i].midi_pitch = _score_pitch_and_octave_to_midi (note->pitch,
+ note->octave);
+ /* Relative pitch will be filled in after sorting. */
+ notes[i].relative_pitch = 0;
+ }
+
+ qsort (notes, num_notes, sizeof (analyzed_note_t), _compare_analyzed_note);
+
+ bass_pitch = notes[0].midi_pitch;
+
+ for (i = 0; i < num_notes; i++) {
+ notes[i].relative_pitch = notes[i].midi_pitch - bass_pitch;
+ }
+
+ for (i = 0; i < ARRAY_SIZE (intervals); i++) {
+ if (_chord_signature_matches (notes, num_notes, intervals[i].pitches, 2))
+ chord_name = intervals[i].name;
+ }
+
+ for (i = 0; i < ARRAY_SIZE (triads); i++) {
+ if (_chord_signature_matches (notes, num_notes, triads[i].pitches, 3))
+ chord_name = triads[i].name;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(sevenths); i++) {
+ if (_chord_signature_matches (notes, num_notes, sevenths[i].pitches, 4))
+ chord_name = sevenths[i].name;
+ }
+
+ if (chord_name)
+ scherzo->chord = score_add_chord (scherzo->treble, chord_name);
+ else
+ scherzo->chord = score_add_chord (scherzo->treble, "Unknown or not a chord");
+
+DONE:
+ talloc_free (local);
+}
+
static score_note_t *
-scherzo_add_note_midi (scherzo_t *scherzo, unsigned char midi_note)
+scherzo_add_note (scherzo_t *scherzo, score_pitch_t pitch, int octave)
{
score_staff_t *staff;
- score_pitch_t pitch;
- int octave;
score_note_t *note;
+ int i;
- staff = scherzo->challenge.staff;
+ if (scherzo->challenge.note)
+ staff = scherzo->challenge.staff;
+ else
+ staff = scherzo->treble;
- _midi_to_score_pitch_and_octave (midi_note, &pitch, &octave);
+ /* Do nothing if this note is already pressed. */
+ for (i = 0; i < scherzo->num_notes_pressed; i++) {
+ if (scherzo->notes_pressed[i]->pitch == pitch &&
+ scherzo->notes_pressed[i]->octave == octave)
+ {
+ return scherzo->notes_pressed[i];
+ }
+ }
note = score_add_note (staff, pitch, octave, SCORE_DURATION_WHOLE);
scherzo->notes_pressed[scherzo->num_notes_pressed - 1] = note;
+ scherzo_analyze_chord (scherzo);
+
return note;
}
+
static void
-scherzo_remove_note_midi (scherzo_t *scherzo, unsigned char midi_note)
+scherzo_remove_note (scherzo_t *scherzo, score_pitch_t pitch, int octave)
{
- score_pitch_t pitch;
- int octave;
score_note_t *note;
int i;
- _midi_to_score_pitch_and_octave (midi_note, &pitch, &octave);
-
for (i = 0; i < scherzo->num_notes_pressed; i++) {
note = scherzo->notes_pressed[i];
if (note->pitch == pitch && note->octave == octave) {
i--;
}
}
+
+ scherzo_analyze_chord (scherzo);
+}
+
+static score_note_t *
+scherzo_add_note_midi (scherzo_t *scherzo, unsigned char midi_note)
+{
+ score_pitch_t pitch;
+ int octave;
+
+ _midi_to_score_pitch_and_octave (midi_note, &pitch, &octave);
+
+ return scherzo_add_note (scherzo, pitch, octave);
+}
+
+
+static void
+scherzo_remove_note_midi (scherzo_t *scherzo, unsigned char midi_note)
+{
+ score_pitch_t pitch;
+ int octave;
+
+ _midi_to_score_pitch_and_octave (midi_note, &pitch, &octave);
+
+ scherzo_remove_note (scherzo, pitch, octave);
}
void
{
challenge_t *challenge = &scherzo->challenge;
+ if (! scherzo->challenge.note) {
+ score_set_note_color_rgb (note, 0.0, 0.0, 0.0); /* black */
+ return;
+ }
+
if (note->pitch == challenge->note->pitch &&
note->octave == challenge->note->octave)
{
challenge->satisfied = 1;
+ score_set_note_color_rgb (note, 18/256., 130/256., 28/256.); /* green */
}
else
{
challenge->mistaken = 1;
+ score_set_note_color_rgb (note, 184/256., 4/256., 22/256.); /* red */
}
}
{
challenge_t *challenge = &scherzo->challenge;
+ if (! challenge->note)
+ return;
+
if (! challenge->satisfied)
return;
scherzo.ctx = talloc_new (NULL);
scherzo.score = score_create (scherzo.ctx);
- scherzo.staff_height = 48;
+ scherzo.staff_height = 100;
score_set_staff_height (scherzo.score, scherzo.staff_height);
score_add_brace (scherzo.score, 2);
scherzo.treble = score_add_staff (scherzo.score, SCORE_CLEF_G);
scherzo.bass = score_add_staff (scherzo.score, SCORE_CLEF_F);
+ scherzo.chord = NULL;
+
scherzo.num_notes_pressed = 0;
scherzo.notes_pressed = NULL;
mnemon_init (&scherzo.mnemon);
/* XXX: Should create a default file if one cannot be loaded. */
- mnemon_load_category (&scherzo.mnemon, "scherzo");
+ mnemon_load_category (&scherzo.mnemon, "scherzo-notes");
scherzo.challenge.note = NULL;
+/*
_select_challenge (&scherzo);
+*/
err = snd_midi_event_new (MIDI_BUF_SIZE, &scherzo.snd_midi_event);
if (err) {
scherzo.window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
- gtk_window_set_default_size (GTK_WINDOW (scherzo.window), 600, 400);
+ gtk_window_set_default_size (GTK_WINDOW (scherzo.window), 1000, 600);
g_signal_connect (scherzo.window, "delete-event",
G_CALLBACK (on_delete_event_quit), NULL);
G_CALLBACK (on_expose_event_draw),
&scherzo);
- g_signal_connect (scherzo.window, "key-press-event",
+ g_signal_connect (scherzo.window, "key-press-event",
G_CALLBACK (on_key_press_event),
&scherzo);
+
+ g_signal_connect (scherzo.window, "key-release-event",
+ G_CALLBACK (on_key_release_event),
+ &scherzo);
gtk_widget_show_all (scherzo.window);
projects / scherzo / blobdiff