Removed torchaudio_unittest module from loudness test

Author: bshall

.github/workflows/integration-test.yml

@@ -29,7 +29,7 @@ jobs:
       run: |
         python -m pip install --quiet --upgrade pip
         python -m pip install --quiet --pre torch -f https://download.pytorch.org/whl/nightly/cpu/torch_nightly.html
-        python -m pip install --quiet pytest requests expecttest parameterized scipy cmake ninja deep-phonemizer sentencepiece
+        python -m pip install --quiet pytest requests cmake ninja deep-phonemizer sentencepiece
         python setup.py install
       env:
         USE_FFMPEG: true

test/integration_tests/loudness_compliance_cpu_test.py

@@ -0,0 +1,45 @@
+"""Test suite for compliance with the ITU-R BS.1770-4 recommendation"""
+import zipfile
+
+import pytest
+
+import torch
+import torchaudio
+import torchaudio.functional as F
+
+
+# Test files linked in https://www.itu.int/dms_pub/itu-r/opb/rep/R-REP-BS.2217-2-2016-PDF-E.pdf
+@pytest.mark.parametrize(
+    "filename,url,expected",
+    [
+        (
+            "1770-2_Comp_RelGateTest",
+            "http://www.itu.int/dms_pub/itu-r/oth/11/02/R11020000010030ZIPM.zip",
+            -10.0,
+        ),
+        (
+            "1770-2_Comp_AbsGateTest",
+            "http://www.itu.int/dms_pub/itu-r/oth/11/02/R11020000010029ZIPM.zip",
+            -69.5,
+        ),
+        (
+            "1770-2_Comp_24LKFS_500Hz_2ch",
+            "http://www.itu.int/dms_pub/itu-r/oth/11/02/R11020000010018ZIPM.zip",
+            -24.0,
+        ),
+        (
+            "1770-2 Conf Mono Voice+Music-24LKFS",
+            "http://www.itu.int/dms_pub/itu-r/oth/11/02/R11020000010038ZIPM.zip",
+            -24.0,
+        ),
+    ],
+)
+def test_loudness(tmp_path, filename, url, expected):
+    zippath = tmp_path / filename
+    torch.hub.download_url_to_file(url, zippath, progress=False)
+    with zipfile.ZipFile(zippath) as file:
+        file.extractall(zippath.parent)
+
+    waveform, sample_rate = torchaudio.load(zippath.with_suffix(".wav"))
+    loudness = F.loudness(waveform, sample_rate)
+    assert pytest.approx(loudness.item(), rel=0.01, abs=0.1) == expected