Add torchcodec mock with wav loading and saving

test/torchcodec/decoders.py

@@ -0,0 +1,17 @@
+import test.torchaudio_unittest.common_utils.wav_utils as wav_utils
+
+class AudioDecoder:
+    def __init__(self, uri):
+        self.uri = uri
+
+    def get_all_samples(self):
+        return wav_utils.load_wav(self.uri)
+
+
+class AudioEncoder:
+    def __init__(self, data, sample_rate):
+        self.data = data
+        self.sample_rate = sample_rate
+
+    def to_file(self, uri, bit_rate=None):
+        return wav_utils.save_wav(uri, self.data, self.sample_rate)

test/torchcodec/encoders.py

@@ -0,0 +1,10 @@
+import torchaudio_unittest.common_utils.wav_utils as wav_utils
+
+class AudioEncoder:
+    def __init__(self, data, sample_rate):
+        print("BEING CALLED")
+        self.data = data
+        self.sample_rate = sample_rate
+
+    def to_file(self, uri, bit_rate=None):
+        return wav_utils.save_wav(uri, self.data, self.sample_rate)