chore: import upstream snapshot with attribution

scripts/dataset_processing/process_an4_data.py

@@ -0,0 +1,89 @@
+# Copyright (c) 2020, NVIDIA CORPORATION.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import argparse
+import glob
+import json
+import logging
+import os
+import subprocess
+
+import librosa
+
+parser = argparse.ArgumentParser(description="AN4 dataset download and processing")
+parser.add_argument("--data_root", required=True, default=None, type=str)
+args = parser.parse_args()
+
+
+def build_manifest(data_root, transcripts_path, manifest_path, wav_path):
+    with open(transcripts_path, 'r') as fin:
+        with open(manifest_path, 'w') as fout:
+            for line in fin:
+                # Lines look like this:
+                # <s> transcript </s> (fileID)
+                transcript = line[: line.find('(') - 1].lower()
+                transcript = transcript.replace('<s>', '').replace('</s>', '')
+                transcript = transcript.strip()
+
+                file_id = line[line.find('(') + 1 : -2]  # e.g. "cen4-fash-b"
+                audio_path = os.path.join(
+                    data_root,
+                    wav_path,
+                    file_id[file_id.find('-') + 1 : file_id.rfind('-')],
+                    file_id + '.wav',
+                )
+
+                duration = librosa.core.get_duration(filename=audio_path)
+
+                # Write the metadata to the manifest
+                metadata = {
+                    "audio_filepath": audio_path,
+                    "duration": duration,
+                    "text": transcript,
+                }
+                json.dump(metadata, fout)
+                fout.write('\n')
+
+
+def main():
+    data_root = os.path.abspath(args.data_root)
+
+    # Convert from .sph to .wav
+    logging.info("Converting audio files to .wav...")
+    sph_list = glob.glob(os.path.join(data_root, 'an4/**/*.sph'), recursive=True)
+    for sph_path in sph_list:
+        wav_path = sph_path[:-4] + '.wav'
+        cmd = ['sox', sph_path, wav_path]
+        subprocess.run(cmd)
+    logging.info("Finished conversion.")
+
+    # Build manifests
+    logging.info("Building training manifest...")
+    train_transcripts = os.path.join(data_root, 'an4/etc/an4_train.transcription')
+    train_manifest = os.path.join(data_root, 'an4/train_manifest.json')
+    train_wavs = os.path.join(data_root, 'an4/wav/an4_clstk')
+    build_manifest(data_root, train_transcripts, train_manifest, train_wavs)
+    logging.info("Training manifests created.")
+
+    logging.info("Building test manifest...")
+    test_transcripts = os.path.join(data_root, 'an4/etc/an4_test.transcription')
+    test_manifest = os.path.join(data_root, 'an4/test_manifest.json')
+    test_wavs = os.path.join(data_root, 'an4/wav/an4test_clstk')
+    build_manifest(data_root, test_transcripts, test_manifest, test_wavs)
+    logging.info("Test manifest created.")
+
+    logging.info("Done with AN4 processing!")
+
+
+if __name__ == '__main__':
+    main()