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import os
import json
import numpy as np
from nose.tools import assert_almost_equals
import simpl
import simpl.peak_detection as peak_detection
import simpl.partial_tracking as partial_tracking
import simpl.synthesis as synthesis
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'
)
libsms_harmonic_synthesis_ifft_path = os.path.join(
os.path.dirname(__file__), 'libsms_harmonic_synthesis_ifft.wav'
)
libsms_harmonic_synthesis_sin_path = os.path.join(
os.path.dirname(__file__), 'libsms_harmonic_synthesis_sin.wav'
)
PeakDetection = peak_detection.PeakDetection
SMSPeakDetection = peak_detection.SMSPeakDetection
PartialTracking = partial_tracking.PartialTracking
SMSPartialTracking = partial_tracking.SMSPartialTracking
Synthesis = synthesis.Synthesis
SMSSynthesis = synthesis.SMSSynthesis
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 TestSynthesis(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()
pt.max_partials = max_partials
frames = pt.find_partials(frames)
s = Synthesis()
s.hop_size = hop_size
synth_audio = s.synth(frames)
assert len(synth_audio) == len(self.audio)
class TestSMSSynthesis(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
frames = pd.find_peaks(self.audio)
pt = SMSPartialTracking()
pt.max_partials = max_partials
frames = pt.find_partials(frames)
s = SMSSynthesis()
s.hop_size = hop_size
synth_audio = s.synth(frames)
assert len(synth_audio) == len(self.audio)
def test_harmonic_synthesis_ifft(self):
pd = SMSPeakDetection()
pd.hop_size = hop_size
frames = pd.find_peaks(self.audio)
pt = SMSPartialTracking()
pt.max_partials = max_partials
frames = pt.find_partials(frames)
synth = SMSSynthesis()
synth.hop_size = hop_size
synth.max_partials = max_partials
synth.det_synthesis_type = SMSSynthesis.SMS_DET_IFFT
synth_audio = synth.synth(frames)
assert len(synth_audio) == len(self.audio)
sms_audio, sampling_rate = simpl.read_wav(
libsms_harmonic_synthesis_ifft_path
)
assert len(synth_audio) == len(sms_audio)
for i in range(len(synth_audio)):
assert_almost_equals(synth_audio[i], sms_audio[i], float_precision)
def test_harmonic_synthesis_sin(self):
pd = SMSPeakDetection()
pd.hop_size = hop_size
frames = pd.find_peaks(self.audio)
pt = SMSPartialTracking()
pt.max_partials = max_partials
frames = pt.find_partials(frames)
synth = SMSSynthesis()
synth.hop_size = hop_size
synth.max_partials = max_partials
synth.det_synthesis_type = SMSSynthesis.SMS_DET_SIN
synth_audio = synth.synth(frames)
assert len(synth_audio) == len(self.audio)
sms_audio, sampling_rate = simpl.read_wav(
libsms_harmonic_synthesis_sin_path
)
assert len(synth_audio) == len(sms_audio)
for i in range(len(synth_audio)):
assert_almost_equals(synth_audio[i], sms_audio[i], float_precision)
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