chore: import upstream snapshot with attribution

tools/nemo_forced_aligner/utils/data_prep.py

@@ -0,0 +1,100 @@
+# Copyright (c) 2023, 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 json
+from pathlib import Path
+
+from nemo.collections.common.parts.preprocessing.manifest import get_full_path
+
+
+def get_batch_starts_ends(manifest_filepath, batch_size):
+    """
+    Get the start and end ids of the lines we will use for each 'batch'.
+    """
+
+    with open(manifest_filepath, 'r') as f:
+        num_lines_in_manifest = sum(1 for _ in f)
+
+    starts = [x for x in range(0, num_lines_in_manifest, batch_size)]
+    ends = [x - 1 for x in starts]
+    ends.pop(0)
+    ends.append(num_lines_in_manifest)
+
+    return starts, ends
+
+
+def is_entry_in_any_lines(manifest_filepath, entry):
+    """
+    Returns True if entry is a key in any of the JSON lines in manifest_filepath
+    """
+
+    entry_in_manifest = False
+
+    with open(manifest_filepath, 'r') as f:
+        for line in f:
+            data = json.loads(line)
+
+            if entry in data:
+                entry_in_manifest = True
+
+    return entry_in_manifest
+
+
+def is_entry_in_all_lines(manifest_filepath, entry):
+    """
+    Returns True is entry is a key in all of the JSON lines in manifest_filepath.
+    """
+    with open(manifest_filepath, 'r') as f:
+        for line in f:
+            data = json.loads(line)
+
+            if entry not in data:
+                return False
+
+    return True
+
+
+def get_manifest_lines_batch(manifest_filepath, start, end):
+    manifest_lines_batch = []
+    with open(manifest_filepath, "r", encoding="utf-8-sig") as f:
+        for line_i, line in enumerate(f):
+            if line_i >= start and line_i <= end:
+                data = json.loads(line)
+                data["audio_filepath"] = get_full_path(data["audio_filepath"], manifest_filepath)
+                if "text" in data:
+                    # remove any BOM, any duplicated spaces, convert any
+                    # newline chars to spaces
+                    data["text"] = data["text"].replace("\ufeff", "")
+                    data["text"] = " ".join(data["text"].split())
+
+                    # Replace any horizontal ellipses with 3 separate periods.
+                    # The tokenizer will do this anyway. But making this replacement
+                    # now helps avoid errors when restoring punctuation when saving
+                    # the output files
+                    data["text"] = data["text"].replace("\u2026", "...")
+
+                if not Path(data['audio_filepath']).exists():
+                    extended_path = Path(Path(manifest_filepath).parent, data['audio_filepath'])
+                    if extended_path.exists():
+                        data['audio_filepath'] = str(extended_path)
+                    else:
+                        raise FileNotFoundError(
+                            f"Audio file {data['audio_filepath']} not found in {manifest_filepath}"
+                        )
+
+                manifest_lines_batch.append(data)
+
+            if line_i == end:
+                break
+    return manifest_lines_batch