249 lines
8.5 KiB
Python
249 lines
8.5 KiB
Python
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# Copyright 2016 Google Inc. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Tests to ensure correct extraction of music21 score objects."""
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# internal imports
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from music21 import key
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from music21 import meter
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from music21 import note as music21_note
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from music21 import pitch
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from music21 import stream
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import tensorflow as tf
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from magenta.music import pretty_music21
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class PrettyMusic21Test(tf.test.TestCase):
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def setUp(self):
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self.sources = {'pickup_score': self.makeScoreWithPickup(),
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'scores': self.makeScore()}
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self.simple_scores = {sc_type: pretty_music21.PrettyMusic21(sc)
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for sc_type, sc in self.sources.iteritems()}
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def makeScoreWithPickup(self):
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"""Make a short score with pick up and two voices."""
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sc = stream.Score()
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num_voices = 2
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pitches = ['C', 'A-']
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for i in range(num_voices):
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part = stream.Part()
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part.id = 'part %d' % i
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time_sig = meter.TimeSignature('4/4')
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key_sig = key.Key('c')
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# Add pickup measure.
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pickup = stream.Measure()
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pickup.append(time_sig)
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pickup.append(key_sig)
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n1 = music21_note.Note(pitches[i])
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n1.duration.quarterLength = 1
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pickup.append(n1)
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part.append(pickup)
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# Add full measure.
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full_m = stream.Measure()
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full_m.append(n1)
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n2 = n1.transpose('M2')
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full_m.append(n2)
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full_m.repeatAppend(n1, 2)
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part.append(full_m)
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sc.insert(0, part)
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# Show the full score and all score elements in indented text.
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# sc.show('text')
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return sc
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def makeScore(self):
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"""Make a short score with pick up and two voices."""
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sc = stream.Score()
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num_voices = 2
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pitches = ['C', 'A-']
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for i in range(num_voices):
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part = stream.Part()
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part.id = 'part %d' % i
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time_sig = meter.TimeSignature('4/4')
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key_sig = key.Key('c')
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# Make a note.
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n1 = music21_note.Note(pitches[i])
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n1.duration.quarterLength = 1
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# Add full measure.
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full_m = stream.Measure()
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full_m.append(time_sig)
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full_m.append(key_sig)
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full_m.append(n1)
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n2 = n1.transpose('M2')
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full_m.append(n2)
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full_m.repeatAppend(n1, 2)
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part.append(full_m)
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# Add another full measure.
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full_m = stream.Measure()
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full_m.append(n1)
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n2 = n1.transpose('M2')
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full_m.append(n2)
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full_m.repeatAppend(n1, 2)
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part.append(full_m)
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sc.insert(0, part)
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# Show the full score and all score elements in indented text.
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# sc.show('text')
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return sc
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def testExtractionOfKeySignatureAttributes(self):
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"""Check the key, mode, tonic pitch class extraction from key signature."""
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num_to_major_key = {0: 'C',
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1: 'G',
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2: 'D',
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3: 'A',
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4: 'E',
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5: 'B',
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6: 'F#',
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7: 'C#',
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8: 'G#',
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9: 'D#',
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10: 'A#',
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11: 'E#',
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12: 'B#',
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-2: 'Bb',
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-12: 'Dbb',
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-11: 'Abb',
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-10: 'Ebb',
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-9: 'Bbb',
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-8: 'Fb',
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-7: 'Cb',
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-6: 'Gb',
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-5: 'Db',
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-4: 'Ab',
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-3: 'Eb',
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-1: 'F'}
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num_to_minor_key = {0: 'a',
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1: 'e',
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2: 'b',
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3: 'f#',
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4: 'c#',
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5: 'g#',
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6: 'd#',
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7: 'a#',
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8: 'e#',
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9: 'b#',
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10: 'f##',
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11: 'c##',
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12: 'g##',
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-2: 'g',
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-12: 'bbb',
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-11: 'fb',
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-10: 'cb',
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-9: 'gb',
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-8: 'db',
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-7: 'ab',
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-6: 'eb',
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-5: 'bb',
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-4: 'f',
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-3: 'c',
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-1: 'd'}
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for test_mode in ['major', 'minor']:
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for i in range(-12, 13):
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ks = key.KeySignature(i)
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ks.mode = test_mode
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if test_mode == 'major':
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key_map = num_to_major_key
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else:
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key_map = num_to_minor_key
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try:
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key_name, num_sharps, mode, tonic_pitchclass = (
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pretty_music21._extract_key_signature_attributes(ks))
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except pretty_music21.PrettyMusic21Error:
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self.assertTrue(i < 7 or i > 7)
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continue
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self.assertEqual(key_name, key_map[i])
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if mode == 'minor':
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self.assertEqual(
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key.sharpsToPitch(num_sharps + 3).name,
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key.convertKeyStringToMusic21KeyString(key_name).upper())
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else:
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self.assertEqual(
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key.sharpsToPitch(num_sharps).name,
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key.convertKeyStringToMusic21KeyString(key_name).upper())
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self.assertEqual(mode, ks.mode)
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check_pitch = pitch.Pitch(
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key.convertKeyStringToMusic21KeyString(key_map[i]))
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check_pitchclass = check_pitch.pitchClass
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self.assertEqual(tonic_pitchclass, check_pitchclass)
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def testCompareScores(self):
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"""Test pretty_music21 score by comparing to music21 score."""
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for score_type, source in self.sources.iteritems():
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simple_score = self.simple_scores[score_type]
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# Check overall length.
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self.assertAlmostEqual(source.duration.quarterLength / 2.0,
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simple_score.total_time)
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# Check number of parts.
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self.assertEqual(len(source.parts), len(simple_score.parts))
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# Check the notes.
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# TODO(annahuang): Don't assume note lengths are in quarter units.
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for part_num in range(len(source.parts)):
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part_flat = source.parts[part_num].flat
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for note, simple_note in zip(
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part_flat.getElementsByClass('Note'), simple_score.parts[part_num]):
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self.assertEqual(note.pitch.midi, simple_note.pitch_midi)
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self.assertEqual(
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note.pitch.name.replace('-', 'b'), simple_note.pitch_name)
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note_start = note.getOffsetBySite(part_flat)
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self.assertEqual(note_start / 2.0, simple_note.start_time)
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self.assertEqual((note_start + note.duration.quarterLength) / 2.0,
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simple_note.end_time)
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self.assertEqual(part_num, simple_note.part_index)
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# Check the time signature.
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if 'pickup' in score_type:
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self.assertEqual(len(simple_score.time_signature_changes), 2)
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# Pickup measure of 1/4, and then a full measure of 4/4.
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correct_time_sigs = [(0.0, 1, 4), (0.5, 4, 4)]
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else:
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self.assertEqual(len(simple_score.time_signature_changes), 1)
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correct_time_sigs = [(0.0, 4, 4)]
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for i, time_sig in enumerate(simple_score.time_signature_changes):
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self.assertAlmostEqual(time_sig.time, correct_time_sigs[i][0])
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self.assertEqual(time_sig.numerator, correct_time_sigs[i][1])
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self.assertEqual(time_sig.denominator, correct_time_sigs[i][2])
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# Check the key signature.
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retrieved_key_sigs = simple_score.key_signature_changes
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self.assertEqual(len(retrieved_key_sigs), 1)
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self.assertEqual(retrieved_key_sigs[0].time, 0.0)
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self.assertEqual(retrieved_key_sigs[0].key, 'c')
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self.assertEqual(retrieved_key_sigs[0].mode, 'minor')
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self.assertEqual(retrieved_key_sigs[0].tonic_pitchclass, 0)
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# TODO(annahuang): Check tempo.
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def testSortedNotes(self):
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"""Test if notes are sorted by start time."""
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for simple_score in self.simple_scores.values():
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notes = simple_score.sorted_notes
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assert all(notes[i].start_time <= notes[i + 1].start_time
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for i in range(len(notes) - 1))
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if __name__ == '__main__':
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tf.test.main()
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