Initial commit: FunASR Speech Recognition Toolkit

Add complete FunASR codebase including models, runtime, and documentation.

funasr/tokenizer/build_tokenizer.py

@@ -0,0 +1,59 @@
+from pathlib import Path
+from typing import Iterable
+from typing import Union
+
+
+from funasr.tokenizer.abs_tokenizer import AbsTokenizer
+from funasr.tokenizer.char_tokenizer import CharTokenizer
+from funasr.tokenizer.phoneme_tokenizer import PhonemeTokenizer
+from funasr.tokenizer.sentencepiece_tokenizer import SentencepiecesTokenizer
+from funasr.tokenizer.word_tokenizer import WordTokenizer
+
+
+def build_tokenizer(
+    token_type: str,
+    bpemodel: Union[Path, str, Iterable[str]] = None,
+    non_linguistic_symbols: Union[Path, str, Iterable[str]] = None,
+    remove_non_linguistic_symbols: bool = False,
+    space_symbol: str = "<space>",
+    delimiter: str = None,
+    g2p_type: str = None,
+) -> AbsTokenizer:
+    """A helper function to instantiate Tokenizer"""
+    if token_type == "bpe":
+        if bpemodel is None:
+            raise ValueError('bpemodel is required if token_type = "bpe"')
+
+        if remove_non_linguistic_symbols:
+            raise RuntimeError(
+                "remove_non_linguistic_symbols is not implemented for token_type=bpe"
+            )
+        return SentencepiecesTokenizer(bpemodel)
+
+    elif token_type == "word":
+        if remove_non_linguistic_symbols and non_linguistic_symbols is not None:
+            return WordTokenizer(
+                delimiter=delimiter,
+                non_linguistic_symbols=non_linguistic_symbols,
+                remove_non_linguistic_symbols=True,
+            )
+        else:
+            return WordTokenizer(delimiter=delimiter)
+
+    elif token_type == "char":
+        return CharTokenizer(
+            non_linguistic_symbols=non_linguistic_symbols,
+            space_symbol=space_symbol,
+            remove_non_linguistic_symbols=remove_non_linguistic_symbols,
+        )
+
+    elif token_type == "phn":
+        return PhonemeTokenizer(
+            g2p_type=g2p_type,
+            non_linguistic_symbols=non_linguistic_symbols,
+            space_symbol=space_symbol,
+            remove_non_linguistic_symbols=remove_non_linguistic_symbols,
+        )
+
+    else:
+        raise ValueError(f"token_mode must be one of bpe, word, char or phn: " f"{token_type}")