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import os
import json
from nose.tools import assert_almost_equals
import simpl
import simpl.peak_detection as peak_detection
import simpl.partial_tracking as partial_tracking
PeakDetection = peak_detection.PeakDetection
SMSPeakDetection = peak_detection.SMSPeakDetection
PartialTracking = partial_tracking.PartialTracking
SMSPartialTracking = partial_tracking.SMSPartialTracking
float_precision = 2
frame_size = 512
hop_size = 512
max_peaks = 10
max_partials = 10
num_frames = 30
num_samples = num_frames * hop_size
audio_path = os.path.join(
os.path.dirname(__file__), 'audio/flute.wav'
)
libsms_test_data_path = os.path.join(
os.path.dirname(__file__), 'libsms_test_data.json'
)
def _load_libsms_test_data():
test_data = None
with open(libsms_test_data_path, 'r') as f:
test_data = json.loads(f.read())
return test_data
class TestPartialTracking(object):
@classmethod
def setup_class(cls):
cls.audio = simpl.read_wav(audio_path)[0]
cls.audio = cls.audio[0:num_samples]
def test_basic(self):
pd = PeakDetection()
pd.hop_size = hop_size
frames = pd.find_peaks(self.audio)
pt = PartialTracking()
frames = pt.find_partials(frames)
print 'frames: %d (expected: %d)' %\
(len(frames), len(self.audio) / hop_size)
assert len(frames) == len(self.audio) / hop_size
assert len(frames[0].partials) == 0
assert frames[0].max_partials == 100
class TestSMSPartialTracking(object):
@classmethod
def setup_class(cls):
cls.audio = simpl.read_wav(audio_path)[0]
cls.audio = cls.audio[0:num_samples]
cls.test_data = _load_libsms_test_data()
def test_basic(self):
pd = SMSPeakDetection()
pd.hop_size = hop_size
pd.max_peaks = max_peaks
pd.static_frame_size = True
frames = pd.find_peaks(self.audio)
pt = SMSPartialTracking()
pt.max_partials = max_partials
frames = pt.find_partials(frames)
print 'frames: %d (expected: %d)' %\
(len(frames), len(self.audio) / hop_size)
assert len(frames) == len(self.audio) / hop_size
assert frames[0].num_partials == max_partials
assert frames[0].max_partials == max_partials
def test_partial_tracking(self):
pd = SMSPeakDetection()
pd.max_peaks = max_peaks
pd.hop_size = hop_size
peaks = pd.find_peaks(self.audio)
pt = SMSPartialTracking()
pt.max_partials = max_partials
frames = pt.find_partials(peaks)
sms_frames = self.test_data['partial_tracking']
sms_frames = sms_frames[0:len(sms_frames) - 3]
assert len(sms_frames) == len(frames)
for i in range(len(frames)):
assert len(frames[i].partials) == len(sms_frames[i]['partials'])
for p in range(len(frames[i].partials)):
assert_almost_equals(frames[i].partials[p].amplitude,
sms_frames[i]['partials'][p]['amplitude'],
float_precision)
assert_almost_equals(frames[i].partials[p].frequency,
sms_frames[i]['partials'][p]['frequency'],
float_precision)
assert_almost_equals(frames[i].partials[p].phase,
sms_frames[i]['partials'][p]['phase'],
float_precision)
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