1 files changed, 84 insertions, 0 deletions
diff --git a/python/tests/test_filterbank.py b/python/tests/test_filterbank.py
new file mode 100755
index 0000000..cc6e66e
--- /dev/null
+++ b/python/tests/test_filterbank.py
@@ -0,0 +1,84 @@
+#! /usr/bin/env python
+
+from unittest import main
+from numpy.testing import TestCase
+from numpy.testing import assert_equal, assert_almost_equal
+import numpy as np
+from aubio import cvec, filterbank, float_type
+from utils import array_from_text_file
+
+class aubio_filterbank_test_case(TestCase):
+
+    def test_members(self):
+        f = filterbank(40, 512)
+        assert_equal ([f.n_filters, f.win_s], [40, 512])
+
+    def test_set_coeffs(self):
+        f = filterbank(40, 512)
+        r = np.random.random([40, int(512 / 2) + 1]).astype(float_type)
+        f.set_coeffs(r)
+        assert_equal (r, f.get_coeffs())
+
+    def test_phase(self):
+        f = filterbank(40, 512)
+        c = cvec(512)
+        c.phas[:] = np.pi
+        assert_equal( f(c), 0);
+
+    def test_norm(self):
+        f = filterbank(40, 512)
+        c = cvec(512)
+        c.norm[:] = 1
+        assert_equal( f(c), 0);
+
+    def test_random_norm(self):
+        f = filterbank(40, 512)
+        c = cvec(512)
+        c.norm[:] = np.random.random((int(512 / 2) + 1,)).astype(float_type)
+        assert_equal( f(c), 0)
+
+    def test_random_coeffs(self):
+        win_s = 128
+        f = filterbank(40, win_s)
+        c = cvec(win_s)
+        r = np.random.random([40, int(win_s / 2) + 1]).astype(float_type)
+        r /= r.sum()
+        f.set_coeffs(r)
+        c.norm[:] = np.random.random((int(win_s / 2) + 1,)).astype(float_type)
+        assert_equal ( f(c) < 1., True )
+        assert_equal ( f(c) > 0., True )
+
+    def test_mfcc_coeffs(self):
+        f = filterbank(40, 512)
+        c = cvec(512)
+        f.set_mel_coeffs_slaney(44100)
+        c.norm[:] = np.random.random((int(512 / 2) + 1,)).astype(float_type)
+        assert_equal ( f(c) < 1., True )
+        assert_equal ( f(c) > 0., True )
+
+    def test_mfcc_coeffs_16000(self):
+        expected = array_from_text_file('filterbank_mfcc_16000_512.expected')
+        f = filterbank(40, 512)
+        f.set_mel_coeffs_slaney(16000)
+        assert_almost_equal ( expected, f.get_coeffs() )
+
+class aubio_filterbank_wrong_values(TestCase):
+
+    def test_negative_window(self):
+        self.assertRaises(ValueError, filterbank, 40, -20)
+
+    def test_negative_filters(self):
+        self.assertRaises(ValueError, filterbank, -40, 1024)
+
+    def test_filterbank_long_cvec(self):
+        f = filterbank(40, 512)
+        with self.assertRaises(ValueError):
+            f(cvec(1024))
+
+    def test_filterbank_short_cvec(self):
+        f = filterbank(40, 512)
+        with self.assertRaises(ValueError):
+            f(cvec(256))
+
+if __name__ == '__main__':
+    main()