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import os
import json
import simpl
import simpl.peak_detection as peak_detection
PeakDetection = peak_detection.PeakDetection
SMSPeakDetection = peak_detection.SMSPeakDetection
float_precision = 5
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'
)
test_data_path = os.path.join(
os.path.dirname(__file__), 'libsms_test_data.json'
)
def _load_libsms_test_data():
test_data = None
with open(test_data_path, 'r') as f:
test_data = json.loads(f.read())
return test_data
class TestPeakDetection(object):
@classmethod
def setup_class(cls):
cls.audio = simpl.read_wav(audio_path)[0]
def test_basic(self):
pd = PeakDetection()
pd.max_peaks = max_peaks
pd.find_peaks(self.audio)
assert len(pd.frames) == len(self.audio) / hop_size
assert len(pd.frames[0].peaks) == 0
assert pd.frames[0].max_peaks == max_peaks
class TestSMSPeakDetection(object):
@classmethod
def setup_class(cls):
cls.audio = simpl.read_wav(audio_path)[0]
cls.test_data = _load_libsms_test_data()
def test_basic(self):
pd = SMSPeakDetection()
pd.hop_size = hop_size
pd.static_frame_size = True
pd.find_peaks(self.audio)
assert len(pd.frames) == len(self.audio) / hop_size
assert len(pd.frames[0].peaks)
def test_size_next_read(self):
"""
Make sure SMSPeakDetection is calculating the correct value for the
size of the next frame.
"""
audio, sampling_rate = simpl.read_wav(audio_path)
pd = SMSPeakDetection()
pd.hop_size = hop_size
pd.max_peaks = max_peaks
current_frame = 0
sample_offset = 0
next_read_sizes = self.test_data['size_next_read']
while current_frame < num_frames:
pd.frame_size = pd.next_frame_size()
assert next_read_sizes[current_frame] == pd.frame_size,\
(next_read_sizes[current_frame], pd.frame_size)
frame = simpl.Frame()
frame.size = pd.frame_size
frame.audio = audio[sample_offset:sample_offset + pd.frame_size]
pd.find_peaks_in_frame(frame)
sample_offset += pd.frame_size
current_frame += 1
def test_peak_detection(self):
audio, sampling_rate = simpl.read_wav(audio_path)
pd = SMSPeakDetection()
pd.max_peaks = max_peaks
pd.hop_size = hop_size
frames = pd.find_peaks(audio[0:num_samples])
sms_frames = self.test_data['peak_detection']
sms_frames = [f for f in sms_frames if f['status'] != 0]
print 'frames: %d (expected: %d)' % (len(frames), len(sms_frames))
assert len(sms_frames) == len(frames)
for frame in frames:
assert frame.num_peaks <= max_peaks, frame.num_peaks
max_amp = max([p.amplitude for p in frame.peaks])
assert max_amp
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