Remove global audio backend from test (#3691)

global audio backend is removed thus this is no-op.

test/torchaudio_unittest/common_utils/__init__.py

 from .autograd_utils import use_deterministic_algorithms
-from .backend_utils import set_audio_backend
 from .case_utils import (
     disabledInCI,
     HttpServerMixin,
@@ -37,7 +36,6 @@ __all__ = [
     "get_whitenoise",
     "get_sinusoid",
     "get_spectrogram",
-    "set_audio_backend",
     "TempDirMixin",
     "HttpServerMixin",
     "TestBaseMixin",

test/torchaudio_unittest/common_utils/backend_utils.py

-import unittest
-
-import torchaudio
-
-
-def set_audio_backend(backend):
-    """Allow additional backend value, 'default'"""
-    backends = torchaudio.list_audio_backends()
-    if backend == "soundfile":
-        be = "soundfile"
-    elif backend == "default":
-        if "sox_io" in backends:
-            be = "sox_io"
-        elif "soundfile" in backends:
-            be = "soundfile"
-        else:
-            raise unittest.SkipTest("No default backend available")
-    else:
-        be = backend
-
-    torchaudio.set_audio_backend(be)

test/torchaudio_unittest/common_utils/case_utils.py

@@ -15,8 +15,6 @@ from torch.testing._internal.common_utils import TestCase as PytorchTestCase
 from torchaudio._internal.module_utils import eval_env, is_module_available
 from torchaudio.utils.ffmpeg_utils import get_video_decoders, get_video_encoders
 
-from .backend_utils import set_audio_backend
-
 
 class TempDirMixin:
     """Mixin to provide easy access to temp dir"""
@@ -88,15 +86,13 @@ class HttpServerMixin(TempDirMixin):
 
 
 class TestBaseMixin:
-    """Mixin to provide consistent way to define device/dtype/backend aware TestCase"""
+    """Mixin to provide consistent way to define device/dtype aware TestCase"""
 
     dtype = None
     device = None
-    backend = None
 
     def setUp(self):
         super().setUp()
-        set_audio_backend(self.backend)
         torch.random.manual_seed(2434)
 
     @property

test/torchaudio_unittest/datasets/cmuarctic_test.py

@@ -47,7 +47,6 @@ def get_mock_dataset(root_dir):
 
 
 class TestCMUARCTIC(TempDirMixin, TorchaudioTestCase):
-    backend = "default"
 
     root_dir = None
     samples = []

test/torchaudio_unittest/datasets/commonvoice_test.py

@@ -142,7 +142,6 @@ class BaseTestCommonVoice(TempDirMixin):
 
 
 class TestCommonVoiceEN(BaseTestCommonVoice, TorchaudioTestCase):
-    backend = "default"
     root_dir = None
 
     @classmethod
@@ -160,7 +159,6 @@ class TestCommonVoiceEN(BaseTestCommonVoice, TorchaudioTestCase):
 
 
 class TestCommonVoiceFR(BaseTestCommonVoice, TorchaudioTestCase):
-    backend = "default"
     root_dir = None
 
     @classmethod

test/torchaudio_unittest/datasets/dr_vctk_test.py

@@ -74,7 +74,6 @@ def get_mock_dataset(root_dir):
 
 
 class TestDRVCTK(TempDirMixin, TorchaudioTestCase):
-    backend = "default"
 
     root_dir = None
     samples = {}

test/torchaudio_unittest/datasets/fluentcommands_test.py

@@ -104,7 +104,6 @@ def get_mock_dataset(dataset_dir: str):
 
 class TestFluentSpeechCommands(TempDirMixin, TorchaudioTestCase):
     root_dir = None
-    backend = "default"
 
     mocked_train_samples = []
     mocked_valid_samples = []

test/torchaudio_unittest/datasets/gtzan_test.py

@@ -37,7 +37,6 @@ def get_mock_dataset(root_dir):
 
 
 class TestGTZAN(TempDirMixin, TorchaudioTestCase):
-    backend = "default"
 
     root_dir = None
     samples = []

test/torchaudio_unittest/datasets/iemocap_test.py

@@ -91,7 +91,6 @@ def get_mock_dataset(dataset_dir: str):
 
 class TestIemocap(TempDirMixin, TorchaudioTestCase):
     root_dir = None
-    backend = "default"
 
     all_samples = []
     script_samples = []

test/torchaudio_unittest/datasets/librilightlimited_test.py

@@ -69,7 +69,6 @@ def get_mock_datasets(root_dir):
 
 
 class TestLibriLightLimited(TempDirMixin, TorchaudioTestCase):
-    backend = "default"
 
     root_dir = None
     samples_10min = []

test/torchaudio_unittest/datasets/librimix_test.py

@@ -65,7 +65,6 @@ def get_mock_dataset(root_dir: str, num_speaker: int):
 
 
 class TestLibriMix(TempDirMixin, TorchaudioTestCase):
-    backend = "default"
 
     root_dir = None
     samples_2spk = []

test/torchaudio_unittest/datasets/librispeech_test_impl.py

@@ -49,7 +49,6 @@ def get_mock_dataset(root_dir):
 
 
 class LibriSpeechTestMixin(TempDirMixin):
-    backend = "default"
 
     root_dir = None
     samples = []

test/torchaudio_unittest/datasets/libritts_test.py

@@ -41,7 +41,6 @@ def get_mock_dataset(root_dir):
 
 
 class TestLibriTTS(TempDirMixin, TorchaudioTestCase):
-    backend = "default"
 
     root_dir = None
     data = []

test/torchaudio_unittest/datasets/ljspeech_test.py

@@ -45,7 +45,6 @@ def get_mock_dataset(root_dir):
 
 
 class TestLJSpeech(TempDirMixin, TorchaudioTestCase):
-    backend = "default"
 
     root_dir = None
     data, _transcripts, _normalized_transcript = [], [], []

test/torchaudio_unittest/datasets/musdb_hq_test.py

@@ -86,7 +86,6 @@ def get_mock_dataset(dataset_dir):
 
 class TestMusDB_HQ(TempDirMixin, TorchaudioTestCase):
     root_dir = None
-    backend = "default"
 
     train_all_samples = {}
     train_only_samples = {}

test/torchaudio_unittest/datasets/quesst14_test.py

@@ -104,7 +104,6 @@ def get_mock_dataset(dataset_dir):
 
 class TestQuesst14(TempDirMixin, TorchaudioTestCase):
     root_dir = None
-    backend = "default"
 
     utterances = {}
     dev_samples = {}

test/torchaudio_unittest/datasets/snips_test.py

@@ -82,7 +82,6 @@ def get_mock_datasets(dataset_dir):
 
 class TestSnips(TempDirMixin, TorchaudioTestCase):
     root_dir = None
-    backend = "default"
 
     train_samples = {}
     valid_samples = {}

test/torchaudio_unittest/datasets/speechcommands_test.py

@@ -95,7 +95,6 @@ def get_mock_dataset(dataset_dir):
 
 
 class TestSpeechCommands(TempDirMixin, TorchaudioTestCase):
-    backend = "default"
 
     root_dir = None
     samples = []

test/torchaudio_unittest/datasets/tedlium_test.py

 import os
-import platform
 from pathlib import Path
 
 from torchaudio.datasets import tedlium
-from torchaudio_unittest.common_utils import get_whitenoise, save_wav, skipIfNoSox, TempDirMixin, TorchaudioTestCase
+from torchaudio_unittest.common_utils import get_whitenoise, save_wav, TempDirMixin, TorchaudioTestCase
 
 # Used to generate a unique utterance for each dummy audio file
 _UTTERANCES = [
@@ -84,7 +83,7 @@ def get_mock_dataset(dataset_dir):
     return mocked_samples
 
 
-class Tedlium(TempDirMixin):
+class Tedlium(TempDirMixin, TorchaudioTestCase):
     root_dir = None
     samples = {}
 
@@ -131,14 +130,3 @@ class Tedlium(TempDirMixin):
         release = "release3"
         dataset = tedlium.TEDLIUM(self.root_dir, release=release)
         self._test_tedlium(dataset, release)
-
-
-class TestTedliumSoundfile(Tedlium, TorchaudioTestCase):
-    backend = "soundfile"
-
-
-if platform.system() != "Windows":
-
-    @skipIfNoSox
-    class TestTedliumSoxIO(Tedlium, TorchaudioTestCase):
-        backend = "sox_io"

test/torchaudio_unittest/datasets/vctk_test.py

@@ -57,7 +57,6 @@ def get_mock_dataset(root_dir):
 
 
 class TestVCTK(TempDirMixin, TorchaudioTestCase):
-    backend = "default"
 
     root_dir = None
     samples = []