{
scherzo_t *scherzo = user_data;
int octave;
- score_pitch_name_t pitch_name;
+ /* Initialize to keep the compiler quiet. */
+ score_pitch_name_t pitch_name = SCORE_PITCH_C;
score_pitch_t pitch;
if (scherzo->challenge.note)
{
scherzo_t *scherzo = user_data;
int octave;
- score_pitch_name_t pitch_name;
+ /* Initialize to keep the compiler quiet. */
+ score_pitch_name_t pitch_name = SCORE_PITCH_NAME_C;
score_pitch_t pitch;
if (scherzo->challenge.note)
return a->relative_pitch - b->relative_pitch;
}
+typedef struct modified_degree
+{
+ int degree;
+ int modification;
+} modified_degree_t;
+
+static int
+_modified_degree_to_half_steps (const modified_degree_t *degree)
+{
+ int half_steps;
+
+ /* Number of half steps from root to specified degree within a
+ * diatonic scaled. */
+ switch (degree->degree) {
+ case 1:
+ half_steps = 0;
+ break;
+ case 2:
+ half_steps = 2;
+ break;
+ case 3:
+ half_steps = 4;
+ break;
+ case 4:
+ half_steps = 5;
+ break;
+ case 5:
+ half_steps = 7;
+ break;
+ case 6:
+ half_steps = 9;
+ break;
+ case 7:
+ half_steps = 11;
+ break;
+ default:
+ fprintf (stderr, "Internal: Invalid degree %d\n", degree->degree);
+ exit (1);
+ break;
+ }
+
+ return half_steps + degree->modification;
+}
+
static int
_chord_signature_matches (analyzed_note_t *notes,
int num_notes,
- int *signature_pitches,
- int num_signature_pitches)
+ modified_degree_t *degrees,
+ int num_degrees,
+ int *inversion_ret,
+ score_pitch_t *root)
{
- int i;
+#define MAX_DEGREES 4
+ int relative_pitches[MAX_DEGREES];
+ int inversion, max_inversions;
+ int i, root_index;
- if (num_notes != num_signature_pitches)
- return 0;
+ assert (num_degrees <= MAX_DEGREES);
- for (i = 0; i < num_notes; i++)
- if (notes[i].relative_pitch != signature_pitches[i])
+ if (num_notes != num_degrees)
return 0;
- return 1;
+ max_inversions = num_degrees;
+
+ /* We never spell simple intervals as inversions. */
+ if (num_degrees == 2)
+ max_inversions = 1;
+
+ for (inversion = 0; inversion < max_inversions; inversion++) {
+ for (i = 0; i < num_degrees; i++) {
+ /* The num_degrees is in the addition just to ensure all
+ * inputs to the modulus operator remain positive. */
+ int index = (i + num_degrees - inversion) % num_degrees;
+
+ /* Again, adding a 12 to keep things positive. */
+ relative_pitches[index] =
+ (12 +
+ _modified_degree_to_half_steps (°rees[i]) -
+ _modified_degree_to_half_steps (°rees[inversion])) % 12;
+
+ }
+
+ for (i = 0; i < num_notes; i++)
+ if (notes[i].relative_pitch != relative_pitches[i])
+ goto NEXT_INVERSION;
+
+ root_index = (num_notes - inversion) % num_notes;
+ *root = notes[root_index].note->pitch;
+
+ *inversion_ret = inversion;
+
+ return 1;
+
+ NEXT_INVERSION:
+ ;
+ }
+
+ return 0;
+}
+
+static const char *
+_pitch_str (score_pitch_t pitch)
+{
+ switch (pitch) {
+ case SCORE_PITCH_Cff:
+ return "C𝄫";
+ case SCORE_PITCH_Cf:
+ return "C♭";
+ case SCORE_PITCH_C:
+ return "C";
+ case SCORE_PITCH_Cs:
+ return "C♯";
+ case SCORE_PITCH_Css:
+ return "C𝄪";
+ case SCORE_PITCH_Dff:
+ return "D𝄫";
+ case SCORE_PITCH_Df:
+ return "D♭";
+ case SCORE_PITCH_D:
+ return "D";
+ case SCORE_PITCH_Ds:
+ return "D♯";
+ case SCORE_PITCH_Dss:
+ return "D𝄪";
+ case SCORE_PITCH_Eff:
+ return "E𝄫";
+ case SCORE_PITCH_Ef:
+ return "E♭";
+ case SCORE_PITCH_E:
+ return "E";
+ case SCORE_PITCH_Es:
+ return "E♯";
+ case SCORE_PITCH_Ess:
+ return "E𝄪";
+ case SCORE_PITCH_Fff:
+ return "F𝄫";
+ case SCORE_PITCH_Ff:
+ return "F♭";
+ case SCORE_PITCH_F:
+ return "F";
+ case SCORE_PITCH_Fs:
+ return "F♯";
+ case SCORE_PITCH_Fss:
+ return "F𝄪";
+ case SCORE_PITCH_Gff:
+ return "G𝄫";
+ case SCORE_PITCH_Gf:
+ return "G♭";
+ case SCORE_PITCH_G:
+ return "G";
+ case SCORE_PITCH_Gs:
+ return "G♯";
+ case SCORE_PITCH_Gss:
+ return "G𝄪";
+ case SCORE_PITCH_Aff:
+ return "A𝄫";
+ case SCORE_PITCH_Af:
+ return "A♭";
+ case SCORE_PITCH_A:
+ return "A";
+ case SCORE_PITCH_As:
+ return "A♯";
+ case SCORE_PITCH_Ass:
+ return "A𝄪";
+ case SCORE_PITCH_Bff:
+ return "B𝄫";
+ case SCORE_PITCH_Bf:
+ return "B♭";
+ case SCORE_PITCH_B:
+ return "B";
+ case SCORE_PITCH_Bs:
+ return "B♯";
+ case SCORE_PITCH_Bss:
+ return "B𝄪";
+ }
+
+ fprintf (stderr, "Internal error: Unknown pitch %d\n", pitch);
+ exit (1);
}
static void
analyzed_note_t *notes;
note_group_t *note_group;
unsigned i, j, num_notes;
- int bass_pitch;
+ int bass_pitch, inversion;
+ score_pitch_t root;
const char *chord_name = NULL;
if (scherzo->pedal_pressed)
num_notes = note_group->num_notes;
- struct { int pitches[1]; const char *name; } octaves[] = {
- { {0}, "Octave"}
+ struct { modified_degree_t degrees[1]; const char *name; } octaves[] = {
+ { {{1, 0}}, " Octave"}
};
- 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 { modified_degree_t degrees[2]; const char *name; } intervals[] = {
+ { {{1, 0}, {2, -1}}, " Minor 2nd"},
+ { {{1, 0}, {2, 0}}, " Major 2nd"},
+ { {{1, 0}, {3, -1}}, " Minor 3rd"},
+ { {{1, 0}, {3, 0}}, " Major 3rd"},
+ { {{1, 0}, {4, 0}}, " Perfect 4th"},
+ { {{1, 0}, {5, -1}}, " Diminished 5th"},
+ { {{1, 0}, {5, 0}}, " Perfect 5th"},
+ { {{1, 0}, {6, -1}}, " Minor 6th"},
+ { {{1, 0}, {6, 0}}, " Major 6th"},
+ { {{1, 0}, {7, -1}}, " Minor 7th"},
+ { {{1, 0}, {7, 0}}, " 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" }
+/* XXX: The superscript rise value should be relative to the current
+ * font size. Best would be for pango to support this. See:
+ *
+ * https://bugzilla.gnome.org/show_bug.cgi?id=708780
+ *
+ * For now, these are emipirically-derived values that look reasonable
+ * at the default size that score.c is using to draw the staff. If the
+ * user scales the staff up or down then these will look wrong.
+ */
+
+#define SUP "<span font='33' rise='30000'>"
+#define PUS "</span>"
+
+ struct { modified_degree_t degrees[3]; const char *name; } triads[] = {
+ { {{1, 0}, {3, 0}, {5, +1}}, SUP "+" PUS },
+ { {{1, 0}, {3, 0}, {5, 0}}, "" },
+ { {{1, 0}, {3, -1}, {5, 0}}, "m" },
+ { {{1, 0}, {3, -1}, {5, -1}}, "°" }
};
- struct { int pitches[4]; const char *name; } sevenths[] = {
- { {0, 4, 8, 11}, "Augmented/major 7" },
- { {0, 4, 8, 10}, "Augmented 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, 11}, "Diminished/major 7" },
- { {0, 3, 6, 10}, "Half-diminished 7" },
- { {0, 3, 6, 9}, "Diminished 7" }
+ struct { modified_degree_t degrees[4]; const char *name; } sevenths[] = {
+ { {{1, 0}, {3, 0}, {5, +1}, {7, 0}}, SUP "+M7" PUS },
+ { {{1, 0}, {3, 0}, {5, +1}, {7, -1}}, SUP "+7" PUS },
+ { {{1, 0}, {3, 0}, {5, 0}, {7, 0}}, "M7" },
+ { {{1, 0}, {3, 0}, {5, 0}, {7, -1}}, "7" },
+ { {{1, 0}, {3, -1}, {5, 0}, {7, 0}}, "m" SUP "M7" PUS },
+ { {{1, 0}, {3, -1}, {5, 0}, {7, -1}}, "m7" },
+ { {{1, 0}, {3, -1}, {5, -1}, {7, 0}}, "°" SUP "M7" PUS },
+ { {{1, 0}, {3, -1}, {5, -1}, {7, -1}}, "𝆩" SUP "7" PUS },
+ { {{1, 0}, {3, -1}, {5, -1}, {7, -2}}, "°" SUP "7" PUS }
};
if (scherzo->chord) {
switch (num_notes) {
case 1:
for (i = 0; i < ARRAY_SIZE (octaves); i++) {
- if (_chord_signature_matches (notes, num_notes, octaves[i].pitches, 1))
+ if (_chord_signature_matches (notes, num_notes,
+ octaves[i].degrees, 1,
+ &inversion, &root))
+ {
chord_name = octaves[i].name;
+ break;
+ }
}
break;
case 2:
for (i = 0; i < ARRAY_SIZE (intervals); i++) {
- if (_chord_signature_matches (notes, num_notes, intervals[i].pitches, 2))
+ if (_chord_signature_matches (notes, num_notes,
+ intervals[i].degrees, 2,
+ &inversion, &root))
+ {
chord_name = intervals[i].name;
+ break;
+ }
}
break;
case 3:
for (i = 0; i < ARRAY_SIZE (triads); i++) {
- if (_chord_signature_matches (notes, num_notes, triads[i].pitches, 3))
+ if (_chord_signature_matches (notes, num_notes,
+ triads[i].degrees, 3,
+ &inversion, &root))
+ {
chord_name = triads[i].name;
+ break;
+ }
}
break;
case 4:
for (i = 0; i < ARRAY_SIZE(sevenths); i++) {
- if (_chord_signature_matches (notes, num_notes, sevenths[i].pitches, 4))
+ if (_chord_signature_matches (notes, num_notes,
+ sevenths[i].degrees, 4,
+ &inversion, &root))
+ {
chord_name = sevenths[i].name;
+ break;
+ }
}
break;
}
- 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");
+ if (chord_name) {
+ if (inversion) {
+ const char *inversion_str;
+ switch (inversion) {
+ case 1:
+ inversion_str = "1st inversion";
+ break;
+ case 2:
+ inversion_str = "2nd inversion";
+ break;
+ case 3:
+ inversion_str = "3rd inversion";
+ break;
+ default:
+ fprintf (stderr, "Internal error: Unexpected inversion: %d\n",
+ inversion);
+ exit(1);
+ }
+ chord_name = talloc_asprintf (local, "%s%s %s",
+ _pitch_str (root),
+ chord_name, inversion_str);
+ } else {
+ chord_name = talloc_asprintf (local, "%s%s",
+ _pitch_str (root),
+ chord_name);
+ }
+ } else {
+ chord_name = talloc_strdup (local, "Unknown chord");
+ }
+
+ scherzo->chord = score_add_chord (scherzo->treble, chord_name);
DONE:
talloc_free (local);
projects / scherzo / blobdiff