X-Git-Url: https://git.cworth.org/git?a=blobdiff_plain;f=scherzo.c;h=8152418adfa8bc2bda1f235d48c91bb7c5c70f85;hb=d25fa8b91eb2e9dad783584215c35124b65429a8;hp=a1a279786b21339eec1d4dc3e597325f32e19e13;hpb=4f246b4a5607782e18131cc4d90ec50ea197258d;p=scherzo diff --git a/scherzo.c b/scherzo.c index a1a2797..8152418 100644 --- a/scherzo.c +++ b/scherzo.c @@ -60,9 +60,11 @@ typedef struct scherzo score_staff_t *bass; score_chord_t *chord; - /* This is for a "computer keyboard". Any "piano keyboard" key - * knows its own octave. */ + /* The word "keyboard" here is referring to a "computer + * keyboard". Any "piano keyboard" key knows its own octave and + * accidental already. */ int keyboard_octave; + score_pitch_accidental_t keyboard_accidental; int midi_fd; snd_midi_event_t *snd_midi_event; @@ -145,6 +147,8 @@ on_key_press_event (GtkWidget *widget, { scherzo_t *scherzo = user_data; int octave; + /* Initialize to keep the compiler quiet. */ + score_pitch_name_t pitch_name = SCORE_PITCH_C; score_pitch_t pitch; if (scherzo->challenge.note) @@ -174,31 +178,31 @@ on_key_press_event (GtkWidget *widget, return FALSE; case GDK_KEY_c: case GDK_KEY_C: - pitch = SCORE_PITCH_C; + pitch_name = SCORE_PITCH_NAME_C; break; case GDK_KEY_d: case GDK_KEY_D: - pitch = SCORE_PITCH_D; + pitch_name = SCORE_PITCH_NAME_D; break; case GDK_KEY_e: case GDK_KEY_E: - pitch = SCORE_PITCH_E; + pitch_name = SCORE_PITCH_NAME_E; break; case GDK_KEY_f: case GDK_KEY_F: - pitch = SCORE_PITCH_F; + pitch_name = SCORE_PITCH_NAME_F; break; case GDK_KEY_g: case GDK_KEY_G: - pitch = SCORE_PITCH_G; + pitch_name = SCORE_PITCH_NAME_G; break; case GDK_KEY_a: case GDK_KEY_A: - pitch = SCORE_PITCH_A; + pitch_name = SCORE_PITCH_NAME_A; break; case GDK_KEY_b: case GDK_KEY_B: - pitch = SCORE_PITCH_B; + pitch_name = SCORE_PITCH_NAME_B; break; case GDK_KEY_0: case GDK_KEY_1: @@ -214,8 +218,18 @@ on_key_press_event (GtkWidget *widget, case GDK_KEY_space: scherzo_press_pedal (scherzo); break; + case GDK_KEY_Up: + if (scherzo->keyboard_accidental < SCORE_PITCH_ACCIDENTAL_DOUBLE_SHARP) + scherzo->keyboard_accidental++; + break; + case GDK_KEY_Down: + if (scherzo->keyboard_accidental > SCORE_PITCH_ACCIDENTAL_DOUBLE_FLAT) + scherzo->keyboard_accidental--; + break; } + pitch = SCORE_PITCH (pitch_name, scherzo->keyboard_accidental); + if ((key->keyval >= GDK_KEY_A && key->keyval <= GDK_KEY_G) || (key->keyval >= GDK_KEY_a && key->keyval <= GDK_KEY_g)) { @@ -240,6 +254,8 @@ on_key_release_event (unused (GtkWidget *widget), { scherzo_t *scherzo = user_data; int octave; + /* Initialize to keep the compiler quiet. */ + score_pitch_name_t pitch_name = SCORE_PITCH_NAME_C; score_pitch_t pitch; if (scherzo->challenge.note) @@ -250,37 +266,39 @@ on_key_release_event (unused (GtkWidget *widget), switch (key->keyval) { case GDK_KEY_c: case GDK_KEY_C: - pitch = SCORE_PITCH_C; + pitch_name = SCORE_PITCH_NAME_C; break; case GDK_KEY_d: case GDK_KEY_D: - pitch = SCORE_PITCH_D; + pitch_name = SCORE_PITCH_NAME_D; break; case GDK_KEY_e: case GDK_KEY_E: - pitch = SCORE_PITCH_E; + pitch_name = SCORE_PITCH_NAME_E; break; case GDK_KEY_f: case GDK_KEY_F: - pitch = SCORE_PITCH_F; + pitch_name = SCORE_PITCH_NAME_F; break; case GDK_KEY_g: case GDK_KEY_G: - pitch = SCORE_PITCH_G; + pitch_name = SCORE_PITCH_NAME_G; break; case GDK_KEY_a: case GDK_KEY_A: - pitch = SCORE_PITCH_A; + pitch_name = SCORE_PITCH_NAME_A; break; case GDK_KEY_b: case GDK_KEY_B: - pitch = SCORE_PITCH_B; + pitch_name = SCORE_PITCH_NAME_B; break; case GDK_KEY_space: scherzo_release_pedal (scherzo); break; } + pitch = SCORE_PITCH (pitch_name, scherzo->keyboard_accidental); + if ((key->keyval >= GDK_KEY_A && key->keyval <= GDK_KEY_G) || (key->keyval >= GDK_KEY_a && key->keyval <= GDK_KEY_g)) { @@ -345,12 +363,14 @@ _score_pitch_and_octave_to_midi (score_pitch_t pitch, return midi_note; } +/* octave can optionally by NULL */ static void _midi_to_score_pitch_and_octave (unsigned char midi_note, score_pitch_t *pitch, int *octave) { - *octave = midi_note / 12 - 1; + if (octave) + *octave = midi_note / 12 - 1; switch (midi_note % 12) { @@ -422,24 +442,461 @@ _compare_analyzed_note_by_relative_pitch (const void *va, const void *vb) 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; + int scale_degree = degree->degree; + + /* Restrict to actual degrees within a scale. */ + if (scale_degree > 7) + scale_degree = (scale_degree % 8) + 1; + + /* Number of half steps from root to specified degree within a + * diatonic scale. */ + switch (scale_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; +} + +/* Number of half steps from 'root' up to 'pitch' (that is, counting + * the steps up a chromatic scale). */ +static int +_pitch_from_root_in_half_steps (score_pitch_t pitch, score_pitch_t root) +{ + int root_midi = _score_pitch_and_octave_to_midi (root, 0); + int pitch_midi = _score_pitch_and_octave_to_midi (pitch, 0); + + if (pitch_midi < root_midi) + pitch_midi += 12; + + if (pitch_midi < root_midi) { + fprintf (stderr, "Internal error: midi values differ by more than expected.\n"); + exit (1); + } + + return (pitch_midi - root_midi) % 12; +} + 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, + score_pitch_t *root) { - int i; +#define MAX_DEGREES 6 + int relative_pitches[MAX_DEGREES]; + int i, root_index; - if (num_notes != num_signature_pitches) - return 0; + assert (num_degrees <= MAX_DEGREES); + + if (num_notes != num_degrees) + return 0; + + if (inversion >= num_degrees) + return 0; + + /* We never spell simple intervals as inversions. */ + if (num_degrees == 2 && inversion > 0) + return 0; + + 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 != signature_pitches[i]) + if (notes[i].relative_pitch != relative_pitches[i]) return 0; + root_index = (num_notes - inversion) % num_notes; + *root = notes[root_index].note->pitch; + return 1; } +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); +} + +typedef struct chord_signature +{ + int num_degrees; + modified_degree_t degrees[MAX_DEGREES]; + const char *name; +} chord_signature_t; + +/* 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 "" +#define PUS "" + +chord_signature_t signatures[] = { + /* Octave */ + { 1, {{1, 0}}, "P8" }, + + /* Intervals */ + { 2, {{1, 0}, {2, -1}}, "m2" }, + { 2, {{1, 0}, {2, 0}}, "M2" }, + { 2, {{1, 0}, {3, -1}}, "m3" }, + { 2, {{1, 0}, {3, 0}}, "M3" }, + { 2, {{1, 0}, {4, 0}}, "P4" }, + { 2, {{1, 0}, {5, -1}}, "Tri-tone" }, + { 2, {{1, 0}, {5, 0}}, "P5" }, + { 2, {{1, 0}, {6, -1}}, "m6" }, + { 2, {{1, 0}, {6, 0}}, "M6" }, + { 2, {{1, 0}, {7, -1}}, "m7" }, + { 2, {{1, 0}, {7, 0}}, "M7" }, + + /* Triads */ + { 3, {{1, 0}, {4, 0}, {5, 0}}, "sus" }, + { 3, {{1, 0}, {3, 0}, {5, +1}}, SUP "+" PUS }, + { 3, {{1, 0}, {3, 0}, {5, 0}}, "" }, + { 3, {{1, 0}, {3, -1}, {5, 0}}, "m" }, + { 3, {{1, 0}, {3, -1}, {5, -1}}, "°" }, + { 3, {{1, 0}, {2, 0}, {5, 0}}, "msus2" }, + + /* Seventh chords with no 3rd */ + { 3, {{1, 0}, {5, +1}, {7, 0}}, SUP "+M7" PUS }, + { 3, {{1, 0}, {5, +1}, {7, -1}}, SUP "+7" PUS }, + { 3, {{1, 0}, {5, 0}, {7, 0}}, "M7" }, + { 3, {{1, 0}, {5, 0}, {7, -1}}, "7" }, + { 3, {{1, 0}, {5, -1}, {7, -1}}, "7♭5" }, + + /* Seventh chords with no 5th */ + { 3, {{1, 0}, {4, 0}, {7, 0}}, "M7sus" }, + { 3, {{1, 0}, {4, 0}, {7, -1}}, "7sus" }, + { 3, {{1, 0}, {3, 0}, {7, 0}}, "M7" }, + { 3, {{1, 0}, {3, 0}, {7, -1}}, "7" }, + { 3, {{1, 0}, {3, -1}, {7, 0}}, "m" SUP "M7" PUS }, + { 3, {{1, 0}, {3, -1}, {7, -1}}, "m7" }, + { 3, {{1, 0}, {2, 0}, {7, 0}}, "m" SUP "M7" PUS "sus2" }, + { 3, {{1, 0}, {2, 0}, {7, -1}}, "m7sus2" }, + + /* Sixth chords */ + { 4, {{1, 0}, {4, 0}, {5, 0}, {6, 0}}, "6sus" }, + { 4, {{1, 0}, {3, 0}, {5, 0}, {6, 0}}, "6" }, /* Ambiguous with m7 */ + { 4, {{1, 0}, {3, -1}, {5, 0}, {6, 0}}, "m6" }, + { 4, {{1, 0}, {2, 0}, {5, 0}, {6, 0}}, "m6sus2" }, + + /* Seventh chords */ + { 4, {{1, 0}, {4, 0}, {5, +1}, {7, 0}}, SUP "+M7" PUS "sus" }, + { 4, {{1, 0}, {4, 0}, {5, +1}, {7, -1}}, SUP "+7" PUS "sus" }, + { 4, {{1, 0}, {4, 0}, {5, 0}, {7, 0}}, "M7sus" }, + { 4, {{1, 0}, {4, 0}, {5, 0}, {7, -1}}, "7sus" }, + { 4, {{1, 0}, {4, 0}, {5, -1}, {7, -1}}, "7♭5sus" }, + { 4, {{1, 0}, {3, 0}, {5, +1}, {7, 0}}, SUP "+M7" PUS }, + { 4, {{1, 0}, {3, 0}, {5, +1}, {7, -1}}, SUP "+7" PUS }, + { 4, {{1, 0}, {3, 0}, {5, 0}, {7, 0}}, "M7" }, + { 4, {{1, 0}, {3, 0}, {5, 0}, {7, -1}}, "7" }, + { 4, {{1, 0}, {3, 0}, {5, -1}, {7, -1}}, "7♭5" }, + { 4, {{1, 0}, {3, -1}, {5, 0}, {7, 0}}, "m" SUP "M7" PUS }, + { 4, {{1, 0}, {3, -1}, {5, 0}, {7, -1}}, "m7" }, + { 4, {{1, 0}, {3, -1}, {5, -1}, {7, 0}}, "°" SUP "M7" PUS }, + { 4, {{1, 0}, {3, -1}, {5, -1}, {7, -1}}, "𝆩" SUP "7" PUS }, + { 4, {{1, 0}, {3, -1}, {5, -1}, {7, -2}}, "°" SUP "7" PUS }, + { 4, {{1, 0}, {2, 0}, {5, 0}, {7, 0}}, "m" SUP "M7" PUS "sus2" }, + { 4, {{1, 0}, {2, 0}, {5, 0}, {7, -1}}, "m7sus2" }, + { 4, {{1, 0}, {2, 0}, {5, -1}, {7, 0}}, "°" SUP "M7" PUS "sus2" }, + { 4, {{1, 0}, {2, 0}, {5, -1}, {7, -1}}, "𝆩" SUP "7" PUS "sus2" }, + { 4, {{1, 0}, {2, 0}, {5, -1}, {7, -2}}, "°" SUP "7" PUS "sus2" }, /* Ambiguous with 7 */ + + /* The sorting for chords with degree higher than 9 is funny + * to keep the array in degree order after reducing each + * degree to an actual scale degree, (9 -> 2, 11 -> 4, 13 -> + * 6) */ + + /* Ninth chords voiced with no 5th */ + { 4, {{1, 0}, {9, 0}, {4, 0}, {7, 0}}, "M9sus" }, + { 4, {{1, 0}, {9, 0}, {4, 0}, {7, -1}}, "9sus" }, + { 4, {{1, 0}, {9, 0}, {3, 0}, {7, 0}}, "M9" }, + { 4, {{1, 0}, {9, 0}, {3, 0}, {7, -1}}, "9" }, + { 4, {{1, 0}, {9, 0}, {3, -1}, {7, 0}}, "m" SUP "M9" PUS }, + { 4, {{1, 0}, {9, 0}, {3, -1}, {7, -1}}, "m9" }, + { 4, {{1, 0}, {9, -1}, {3, -1}, {7, -1}}, "m♭9" }, + { 4, {{1, 0}, {9, 0}, {3, -1}, {6, 0}}, "m6/9" }, + { 4, {{1, 0}, {9, -1}, {3, -1}, {6, 0}}, "m6/♭9" }, + + /* Sixth plus 9 */ + { 5, {{1, 0}, {9, 0}, {3, 0}, {5, 0}, {6, 0}}, "6/9" }, + { 5, {{1, 0}, {9, 0}, {3, -1}, {5, 0}, {6, 0}}, "m6/9" }, + { 5, {{1, 0}, {9, -1}, {3, -1}, {5, 0}, {6, 0}}, "m6/♭9" }, + + /* Seventh plus altered 9 */ + { 5, {{1, 0}, {9, +1}, {3, 0}, {5, 0}, {7, -1}}, "7♯9" }, + { 5, {{1, 0}, {9, -1}, {3, 0}, {5, 0}, {7, -1}}, "7♭9" }, + { 5, {{1, 0}, {9, +1}, {3, 0}, {5, -1}, {7, -1}}, "7♭5♯9" }, + { 5, {{1, 0}, {9, -1}, {3, 0}, {5, -1}, {7, -1}}, "7♭5♭9" }, + + /* Ninth chords */ + { 5, {{1, 0}, {9, 0}, {4, 0}, {5, +1}, {7, 0}}, SUP "+M9" PUS "sus" }, + { 5, {{1, 0}, {9, 0}, {4, 0}, {5, +1}, {7, -1}}, SUP "+9" PUS "sus" }, + { 5, {{1, 0}, {9, 0}, {4, 0}, {5, 0}, {7, 0}}, "M9sus" }, + { 5, {{1, 0}, {9, 0}, {4, 0}, {5, 0}, {7, -1}}, "9sus" }, + { 5, {{1, 0}, {9, 0}, {3, 0}, {5, +1}, {7, 0}}, SUP "+M9" PUS }, + { 5, {{1, 0}, {9, 0}, {3, 0}, {5, +1}, {7, -1}}, SUP "+9" PUS }, + { 5, {{1, 0}, {9, 0}, {3, 0}, {5, 0}, {7, 0}}, "M9" }, + { 5, {{1, 0}, {9, 0}, {3, 0}, {5, 0}, {7, -1}}, "9" }, + { 5, {{1, 0}, {9, 0}, {3, -1}, {5, 0}, {7, 0}}, "m" SUP "M9" PUS }, + { 5, {{1, 0}, {9, 0}, {3, -1}, {5, 0}, {7, -1}}, "m9" }, + { 5, {{1, 0}, {9, -1}, {3, -1}, {5, 0}, {7, -1}}, "m♭9" }, + { 5, {{1, 0}, {9, 0}, {3, 0}, {5, -1}, {7, 0}}, "M9" SUP "♭5" PUS }, + { 5, {{1, 0}, {9, 0}, {3, 0}, {5, -1}, {7, -1}}, "9" SUP "♭5" PUS }, + { 5, {{1, 0}, {9, 0}, {3, -1}, {5, -1}, {7, 0}}, "m" SUP "M9♭5" PUS }, + { 5, {{1, 0}, {9, 0}, {3, -1}, {5, -1}, {7, -1}}, "𝆩" SUP "9" PUS }, + { 5, {{1, 0}, {9, -1}, {3, -1}, {5, -1}, {7, -1}}, "𝆩" SUP "♭9" PUS }, + { 5, {{1, 0}, {9, 0}, {3, -1}, {5, -1}, {7, -2}}, "°" SUP "9" PUS }, + { 5, {{1, 0}, {9, -1}, {3, -1}, {5, -1}, {7, -2}}, "°" SUP "♭9" PUS }, + + /* Eleventh chords */ + { 6, {{1, 0}, {9, 0}, {3, 0}, {11, 0}, {5, +1}, {7, 0}}, SUP "+M11" PUS }, + { 6, {{1, 0}, {9, 0}, {3, 0}, {11, 0}, {5, +1}, {7, -1}}, SUP "+11" PUS }, + { 6, {{1, 0}, {9, 0}, {3, 0}, {11, 0}, {5, 0}, {7, 0}}, "M11" }, + { 6, {{1, 0}, {9, 0}, {3, 0}, {11, 0}, {5, 0}, {7, -1}}, "11" }, + { 6, {{1, 0}, {9, 0}, {3, -1}, {11, 0}, {5, 0}, {7, 0}}, "m" SUP "M11" PUS }, + { 6, {{1, 0}, {9, 0}, {3, -1}, {11, 0}, {5, 0}, {7, -1}}, "m11" }, + { 6, {{1, 0}, {9, -1}, {3, -1}, {11, 0}, {5, -1}, {7, -1}}, "𝆩" SUP "11" PUS }, + { 6, {{1, 0}, {9, -1}, {3, -1}, {11, -1}, {5, -1}, {7, -2}}, "°" SUP "11" PUS } +}; + +static void +scherzo_adjust_note_to_match_modified_degree (score_note_t *note, + score_pitch_t root, + modified_degree_t *degree) +{ + score_pitch_name_t name = SCORE_PITCH_NAME (note->pitch); + score_pitch_accidental_t accidental = SCORE_PITCH_ACCIDENTAL (note->pitch); + int degree_zero_based = (degree->degree - 1) % 7; + int degree_delta; + + int note_degree_zero_based = name - SCORE_PITCH_NAME (root); + if (note_degree_zero_based < 0) + note_degree_zero_based += 7; + + if (note_degree_zero_based == degree_zero_based) + return; + + degree_delta = note_degree_zero_based - degree_zero_based; + if (degree_delta > 3) + degree_delta = - (7 - degree_delta); + if (degree_delta < -3) + degree_delta = - (-7 - degree_delta); + + if (abs (degree_delta) != 1) { + fprintf (stderr, "Internal error: Cannot adjust a note more than one degree (%d vs. %d).\n", note_degree_zero_based + 1, degree->degree); + exit (1); + } + + if (degree_delta == -1) { + if (name == SCORE_PITCH_NAME_B) { + name = SCORE_PITCH_NAME_C; + note->octave++; + } else { + name++; + } + switch (name) { + case SCORE_PITCH_NAME_D: + case SCORE_PITCH_NAME_E: + case SCORE_PITCH_NAME_G: + case SCORE_PITCH_NAME_A: + case SCORE_PITCH_NAME_B: + accidental -= 2; + break; + case SCORE_PITCH_NAME_C: + case SCORE_PITCH_NAME_F: + accidental -= 1; + break; + } + } + + if (degree_delta == +1) { + if (name == SCORE_PITCH_NAME_C) { + name = SCORE_PITCH_NAME_B; + note->octave--; + } else { + name--; + } + switch (name) { + case SCORE_PITCH_NAME_C: + case SCORE_PITCH_NAME_D: + case SCORE_PITCH_NAME_F: + case SCORE_PITCH_NAME_G: + case SCORE_PITCH_NAME_A: + accidental += 2; + break; + case SCORE_PITCH_NAME_E: + case SCORE_PITCH_NAME_B: + accidental += 1; + } + } + + if (accidental < 0 || accidental > SCORE_PITCH_ACCIDENTAL_DOUBLE_SHARP) { + fprintf (stderr, "Internal error: Trying to adjust an accidental out of range (degree_delta == %d (%d - %d), new accidental == %d).\n", degree_delta, note_degree_zero_based, degree_zero_based, accidental); + exit (1); + } + + note->pitch = SCORE_PITCH (name, accidental); +} + +static void +_spell_chord_by_signature (note_group_t *chord, + int num_notes, + chord_signature_t *signature, + score_pitch_t root) +{ + int i, degree, note_half_steps, degree_half_steps; + int root_midi; + + /* Sanitize root to eliminate things like double-flats, + * double-sharps, Cb, E#, etc. */ + root_midi = _score_pitch_and_octave_to_midi (root, 0); + _midi_to_score_pitch_and_octave (root_midi, &root, NULL); + + for (i = 0; i < num_notes; i++) { + note_half_steps = _pitch_from_root_in_half_steps (chord->notes[i]->pitch, + root); + for (degree = 0; degree < signature->num_degrees; degree++) { + degree_half_steps = _modified_degree_to_half_steps (&signature->degrees[degree]); + if (note_half_steps == degree_half_steps) { + scherzo_adjust_note_to_match_modified_degree (chord->notes[i], + root, + &signature->degrees[degree]); + break; + } + } + if (note_half_steps != degree_half_steps) { + fprintf (stderr, "Internal error: Chord and degree mis-match\n"); + exit (1); + } + } +} + static void scherzo_analyze_chord (scherzo_t *scherzo) { @@ -447,8 +904,10 @@ scherzo_analyze_chord (scherzo_t *scherzo) analyzed_note_t *notes; note_group_t *note_group; unsigned i, j, num_notes; - int bass_pitch; - const char *chord_name = NULL; + int bass_pitch, inversion; + score_pitch_t root; + chord_signature_t *match = NULL; + char *chord_name; if (scherzo->pedal_pressed) note_group = &scherzo->notes_pedaled; @@ -457,43 +916,6 @@ scherzo_analyze_chord (scherzo_t *scherzo) num_notes = note_group->num_notes; - struct { int pitches[1]; const char *name; } octaves[] = { - { {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 { 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, 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" } - }; - if (scherzo->chord) { score_remove_chord (scherzo->chord); scherzo->chord = NULL; @@ -556,37 +978,40 @@ scherzo_analyze_chord (scherzo_t *scherzo) } } - switch (num_notes) { - case 1: - for (i = 0; i < ARRAY_SIZE (octaves); i++) { - if (_chord_signature_matches (notes, num_notes, octaves[i].pitches, 1)) - chord_name = octaves[i].name; - } - break; - case 2: - for (i = 0; i < ARRAY_SIZE (intervals); i++) { - if (_chord_signature_matches (notes, num_notes, intervals[i].pitches, 2)) - chord_name = intervals[i].name; - } - break; - case 3: - 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 (inversion = 0; inversion < 4; inversion++) { + for (i = 0; i < ARRAY_SIZE (signatures); i++) { + if (_chord_signature_matches (notes, num_notes, + signatures[i].degrees, + signatures[i].num_degrees, + inversion, &root)) + { + match = &signatures[i]; + goto HAVE_MATCH; + } } - break; - case 4: - for (i = 0; i < ARRAY_SIZE(sevenths); i++) { - if (_chord_signature_matches (notes, num_notes, sevenths[i].pitches, 4)) - chord_name = sevenths[i].name; + } +HAVE_MATCH: + + chord_name = (char *) signatures[i].name; + + if (match) { + /* Don't print root pitch for octaves and inversions, + * (since a pitch name alone looks like a major triad) */ + if (num_notes < 3) { + chord_name = talloc_strdup (local, chord_name); + } else { + chord_name = talloc_asprintf (local, "%s%s", + _pitch_str (root), + chord_name); } - break; + + _spell_chord_by_signature (note_group, num_notes, + match, root); + } else { + chord_name = talloc_strdup (local, "?"); } - 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"); + scherzo->chord = score_add_chord (scherzo->treble, chord_name); DONE: talloc_free (local); @@ -688,10 +1113,13 @@ scherzo_release_note (scherzo_t *scherzo, score_pitch_t pitch, int octave) score_note_t *note; int i; int found = 0; + int target_midi = _score_pitch_and_octave_to_midi (pitch, octave); + int note_midi; for (i = scherzo->notes_pressed.num_notes - 1; i >=0; i--) { note = scherzo->notes_pressed.notes[i]; - if (note->pitch == pitch && note->octave == octave) { + note_midi = _score_pitch_and_octave_to_midi (note->pitch, note->octave); + if (note_midi == target_midi) { found = 1; if (! scherzo->pedal_pressed) score_remove_note (note); @@ -807,25 +1235,25 @@ _select_challenge (scherzo_t *scherzo) switch (*s) { case 'C': - pitch = SCORE_PITCH_VALUE(C, NATURAL); + pitch = SCORE_PITCH_C; break; case 'D': - pitch = SCORE_PITCH_VALUE(D, NATURAL); + pitch = SCORE_PITCH_D; break; case 'E': - pitch = SCORE_PITCH_VALUE(E, NATURAL); + pitch = SCORE_PITCH_E; break; case 'F': - pitch = SCORE_PITCH_VALUE(F, NATURAL); + pitch = SCORE_PITCH_F; break; case 'G': - pitch = SCORE_PITCH_VALUE(G, NATURAL); + pitch = SCORE_PITCH_G; break; case 'A': - pitch = SCORE_PITCH_VALUE(A, NATURAL); + pitch = SCORE_PITCH_A; break; case 'B': - pitch = SCORE_PITCH_VALUE(B, NATURAL); + pitch = SCORE_PITCH_B; break; default: fprintf (stderr, "Malformed pitch name: %s (expected 'A' - 'G')\n", s); @@ -983,8 +1411,9 @@ main (int argc, char *argv[]) scherzo.chord = NULL; - /* Default to octave 4 for computer keyboard keypresses. */ + /* Default to octave 4 and natural for computer keyboard keypresses. */ scherzo.keyboard_octave = 4; + scherzo.keyboard_accidental = SCORE_PITCH_ACCIDENTAL_NATURAL; note_group_init (scherzo.ctx, &scherzo.notes_pressed); note_group_init (scherzo.ctx, &scherzo.notes_pedaled);