test scenebased

ear/core/scenebased/test/test_design_hoa.py

@@ -0,0 +1,64 @@
+from ...metadata_input import HOATypeMetadata
+from ...hoa_adapter import HOAFormat
+from ..design import build_hoa_decoder_design
+from .. import design_hoa  # noqa: F401
+from ...hoa import norm_SN3D, norm_FuMa
+import numpy as np
+
+
+def test_convert_order_norm():
+    fmt = HOAFormat(max_order=1, normalization="SN3D", channel_order="ACN")
+
+    tm = HOATypeMetadata(
+        orders=[0, 1, 1, 1], degrees=[0, 1, -1, 0], normalization="FuMa"
+    )
+
+    designer = build_hoa_decoder_design(fmt)
+    actual = designer.design(tm)
+
+    # [out, in]
+    expected = np.zeros((4, 4))
+
+    expected[0, 0] = 1
+    expected[1, 2] = 1
+    expected[2, 3] = 1
+    expected[3, 1] = 1
+
+    n, m = fmt.orders_degrees
+    expected *= (norm_SN3D(n, np.abs(m)) / norm_FuMa(n, np.abs(m)))[:, np.newaxis]
+
+    np.testing.assert_allclose(actual, expected)
+
+
+def test_upmix():
+    fmt = HOAFormat(max_order=2, normalization="SN3D", channel_order="ACN")
+
+    tm = HOATypeMetadata(
+        orders=[0, 1, 1, 1], degrees=[0, -1, 0, 1], normalization="SN3D"
+    )
+
+    designer = build_hoa_decoder_design(fmt)
+    actual = designer.design(tm)
+
+    # [out, in]
+    expected = np.eye(9, 4)
+
+    np.testing.assert_allclose(actual, expected)
+
+
+def test_downmix():
+    fmt = HOAFormat(max_order=1, normalization="SN3D", channel_order="ACN")
+
+    tm = HOATypeMetadata(
+        orders=[0, 1, 1, 1, 2, 2, 2, 2, 2],
+        degrees=[0, -1, 0, 1, -2, -1, 0, 1, 2],
+        normalization="SN3D",
+    )
+
+    designer = build_hoa_decoder_design(fmt)
+    actual = designer.design(tm)
+
+    # [out, in]
+    expected = np.eye(4, 9)
+
+    np.testing.assert_allclose(actual, expected)