Fix: #3130 - Missing deepspeech_training.util.text.Alphabet

bin/import_cv2.py

@@ -7,7 +7,6 @@ DeepSpeech.py
 Use "python3 import_cv2.py -h" for help
 """
 import csv
-import itertools
 import os
 import subprocess
 import unicodedata
@@ -24,27 +23,39 @@ from deepspeech_training.util.importers import (
     get_validate_label,
     print_import_report,
 )
-from deepspeech_training.util.text import Alphabet
+from ds_ctcdecoder import Alphabet
 
 FIELDNAMES = ["wav_filename", "wav_filesize", "transcript"]
 SAMPLE_RATE = 16000
 MAX_SECS = 10
+PARAMS = None
+FILTER_OBJ = None
 
 
-def _preprocess_data(tsv_dir, audio_dir, filter_obj, space_after_every_character=False):
+class LabelFilter:
-    exclude = []
+    def __init__(self, normalize, alphabet, validate_fun):
-    for dataset in ["test", "dev", "train", "validated", "other"]:
+        self.normalize = normalize
-        set_samples = _maybe_convert_set(dataset, tsv_dir, audio_dir, filter_obj, space_after_every_character)
+        self.alphabet = alphabet
-        if dataset in ["test", "dev"]:
+        self.validate_fun = validate_fun
-            exclude += set_samples
+
-        if dataset == "validated":
+    def filter(self, label):
-            _maybe_convert_set("train-all", tsv_dir, audio_dir, filter_obj, space_after_every_character,
+        if self.normalize:
-                               rows=set_samples, exclude=exclude)
+            label = unicodedata.normalize("NFKD", label.strip()).encode("ascii", "ignore").decode("ascii", "ignore")
+        label = self.validate_fun(label)
+        if self.alphabet and label and not self.alphabet.CanEncode(label):
+            label = None
+        return label
 
 
-def one_sample(args):
+def init_worker(params):
+    global FILTER_OBJ  # pylint: disable=global-statement
+    validate_label = get_validate_label(params)
+    alphabet = Alphabet(params.filter_alphabet) if params.filter_alphabet else None
+    FILTER_OBJ = LabelFilter(params.normalize, alphabet, validate_label)
+
+
+def one_sample(sample):
     """ Take an audio file, and optionally convert it to 16kHz WAV """
-    sample, filter_obj = args
     mp3_filename = sample[0]
     if not os.path.splitext(mp3_filename.lower())[1] == ".mp3":
         mp3_filename += ".mp3"
@@ -60,7 +71,7 @@ def one_sample(args):
                 ["soxi", "-s", wav_filename], stderr=subprocess.STDOUT
             )
         )
-    label = filter_obj.filter(sample[1])
+    label = FILTER_OBJ.filter(sample[1])
     rows = []
     counter = get_counter()
     if file_size == -1:
@@ -110,10 +121,9 @@ def _maybe_convert_set(dataset, tsv_dir, audio_dir, filter_obj, space_after_ever
         num_samples = len(samples)
 
         print("Importing mp3 files...")
-        pool = Pool()
+        pool = Pool(initializer=init_worker, initargs=(PARAMS,))
         bar = progressbar.ProgressBar(max_value=num_samples, widgets=SIMPLE_BAR)
-        samples_with_context = itertools.zip_longest(samples, [], fillvalue=filter_obj)
+        for i, processed in enumerate(pool.imap_unordered(one_sample, samples), start=1):
-        for i, processed in enumerate(pool.imap_unordered(one_sample, samples_with_context), start=1):
             counter += processed[0]
             rows += processed[1]
             bar.update(i)
@@ -155,6 +165,17 @@ def _maybe_convert_set(dataset, tsv_dir, audio_dir, filter_obj, space_after_ever
     return rows
 
 
+def _preprocess_data(tsv_dir, audio_dir, space_after_every_character=False):
+    exclude = []
+    for dataset in ["test", "dev", "train", "validated", "other"]:
+        set_samples = _maybe_convert_set(dataset, tsv_dir, audio_dir, space_after_every_character)
+        if dataset in ["test", "dev"]:
+            exclude += set_samples
+        if dataset == "validated":
+            _maybe_convert_set("train-all", tsv_dir, audio_dir, space_after_every_character,
+                               rows=set_samples, exclude=exclude)
+
+
 def _maybe_convert_wav(mp3_filename, wav_filename):
     if not os.path.exists(wav_filename):
         transformer = sox.Transformer()
@@ -164,28 +185,8 @@ def _maybe_convert_wav(mp3_filename, wav_filename):
         except sox.core.SoxError:
             pass
 
-class LabelFilter:
-    def __init__(self, normalize, alphabet, validate_fun):
-        self.normalize = normalize
-        self.alphabet = alphabet
-        self.validate_fun = validate_fun
 
-    def filter(self, label):
+def parse_args():
-        if self.normalize:
-            label = (
-                unicodedata.normalize("NFKD", label.strip())
-                .encode("ascii", "ignore")
-                .decode("ascii", "ignore")
-            )
-        label = self.validate_fun(label)
-        if self.alphabet and label:
-            try:
-                self.alphabet.encode(label)
-            except KeyError:
-                label = None
-        return label
-
-def main():
     parser = get_importers_parser(description="Import CommonVoice v2.0 corpora")
     parser.add_argument("tsv_dir", help="Directory containing tsv files")
     parser.add_argument(
@@ -206,18 +207,14 @@ def main():
         action="store_true",
         help="To help transcript join by white space",
     )
+    return parser.parse_args()
 
-    params = parser.parse_args()
-    validate_label = get_validate_label(params)
 
-    audio_dir = (
+def main():
-        params.audio_dir if params.audio_dir else os.path.join(params.tsv_dir, "clips")
+    audio_dir = PARAMS.audio_dir if PARAMS.audio_dir else os.path.join(PARAMS.tsv_dir, "clips")
-    )
+    _preprocess_data(PARAMS.tsv_dir, audio_dir, PARAMS.space_after_every_character)
-    alphabet = Alphabet(params.filter_alphabet) if params.filter_alphabet else None
 
-    filter_obj = LabelFilter(params.normalize, alphabet, validate_label)
-    _preprocess_data(params.tsv_dir, audio_dir, filter_obj,
-                     params.space_after_every_character)
 
 if __name__ == "__main__":
+    PARAMS = parse_args()
     main()

bin/import_lingua_libre.py

@@ -20,7 +20,7 @@ from deepspeech_training.util.importers import (
     get_validate_label,
     print_import_report,
 )
-from deepspeech_training.util.text import Alphabet
+from ds_ctcdecoder import Alphabet
 
 FIELDNAMES = ["wav_filename", "wav_filesize", "transcript"]
 SAMPLE_RATE = 16000
@@ -198,7 +198,7 @@ def handle_args():
         "--iso639-3", type=str, required=True, help="ISO639-3 language code"
     )
     parser.add_argument(
-        "--english-name", type=str, required=True, help="Enligh name of the language"
+        "--english-name", type=str, required=True, help="English name of the language"
     )
     parser.add_argument(
         "--filter_alphabet",
@@ -242,11 +242,8 @@ if __name__ == "__main__":
                 .decode("ascii", "ignore")
             )
         label = validate_label(label)
-        if ALPHABET and label:
+        if ALPHABET and label and not ALPHABET.CanEncode(label):
-            try:
+            label = None
-                ALPHABET.encode(label)
-            except KeyError:
-                label = None
         return label
 
     ARCHIVE_NAME = ARCHIVE_NAME.format(

bin/import_m-ailabs.py

@@ -18,7 +18,7 @@ from deepspeech_training.util.importers import (
     get_validate_label,
     print_import_report,
 )
-from deepspeech_training.util.text import Alphabet
+from ds_ctcdecoder import Alphabet
 
 FIELDNAMES = ["wav_filename", "wav_filesize", "transcript"]
 SAMPLE_RATE = 16000
@@ -215,11 +215,8 @@ if __name__ == "__main__":
                 .decode("ascii", "ignore")
             )
         label = validate_label(label)
-        if ALPHABET and label:
+        if ALPHABET and label and not ALPHABET.CanEncode(label):
-            try:
+            label = None
-                ALPHABET.encode(label)
-            except KeyError:
-                label = None
         return label
 
     ARCHIVE_DIR_NAME = ARCHIVE_DIR_NAME.format(language=CLI_ARGS.language)

bin/import_slr57.py

@@ -1,16 +1,13 @@
 #!/usr/bin/env python3
 import csv
 import os
-import re
 import subprocess
 import tarfile
 import unicodedata
-import zipfile
 from glob import glob
 from multiprocessing import Pool
 
 import progressbar
-import sox
 
 from deepspeech_training.util.downloader import SIMPLE_BAR, maybe_download
 from deepspeech_training.util.importers import (
@@ -20,7 +17,7 @@ from deepspeech_training.util.importers import (
     get_validate_label,
     print_import_report,
 )
-from deepspeech_training.util.text import Alphabet
+from ds_ctcdecoder import Alphabet
 
 FIELDNAMES = ["wav_filename", "wav_filesize", "transcript"]
 SAMPLE_RATE = 16000
@@ -227,11 +224,8 @@ if __name__ == "__main__":
                 .decode("ascii", "ignore")
             )
         label = validate_label(label)
-        if ALPHABET and label:
+        if ALPHABET and label and not ALPHABET.CanEncode(label):
-            try:
+            label = None
-                ALPHABET.encode(label)
-            except KeyError:
-                label = None
         return label
 
     _download_and_preprocess_data(target_dir=CLI_ARGS.target_dir)

bin/import_swc.py

@@ -24,7 +24,7 @@ import sox
 
 from deepspeech_training.util.downloader import SIMPLE_BAR, maybe_download
 from deepspeech_training.util.importers import validate_label_eng as validate_label
-from deepspeech_training.util.text import Alphabet
+from ds_ctcdecoder import Alphabet
 
 SWC_URL = "https://www2.informatik.uni-hamburg.de/nats/pub/SWC/SWC_{language}.tar"
 SWC_ARCHIVE = "SWC_{language}.tar"
@@ -170,7 +170,8 @@ def read_token(token):
 
 
 def in_alphabet(alphabet, c):
-    return True if alphabet is None else alphabet.has_char(c)
+    return alphabet.CanEncode(c) if alphabet else True
+
 
 
 ALPHABETS = {}
@@ -201,16 +202,8 @@ def label_filter(label, language):
     dont_normalize = DONT_NORMALIZE[language] if language in DONT_NORMALIZE else ""
     alphabet = get_alphabet(language)
     for c in label:
-        if (
+        if CLI_ARGS.normalize and c not in dont_normalize and not in_alphabet(alphabet, c):
-            CLI_ARGS.normalize
+            c = unicodedata.normalize("NFKD", c).encode("ascii", "ignore").decode("ascii", "ignore")
-            and c not in dont_normalize
-            and not in_alphabet(alphabet, c)
-        ):
-            c = (
-                unicodedata.normalize("NFKD", c)
-                .encode("ascii", "ignore")
-                .decode("ascii", "ignore")
-            )
         for sc in c:
             if not in_alphabet(alphabet, sc):
                 return None, "illegal character"

bin/import_tuda.py

@@ -16,7 +16,7 @@ import progressbar
 
 from deepspeech_training.util.downloader import SIMPLE_BAR, maybe_download
 from deepspeech_training.util.importers import validate_label_eng as validate_label
-from deepspeech_training.util.text import Alphabet
+from ds_ctcdecoder import Alphabet
 
 TUDA_VERSION = "v2"
 TUDA_PACKAGE = "german-speechdata-package-{}".format(TUDA_VERSION)
@@ -46,22 +46,18 @@ def maybe_extract(archive):
     return extracted
 
 
+def in_alphabet(c):
+    return ALPHABET.CanEncode(c) if ALPHABET else True
+
+
 def check_and_prepare_sentence(sentence):
     sentence = sentence.lower().replace("co2", "c o zwei")
     chars = []
     for c in sentence:
-        if (
+        if CLI_ARGS.normalize and c not in "äöüß" and not in_alphabet(c):
-            CLI_ARGS.normalize
+            c = unicodedata.normalize("NFKD", c).encode("ascii", "ignore").decode("ascii", "ignore")
-            and c not in "äöüß"
-            and (ALPHABET is None or not ALPHABET.has_char(c))
-        ):
-            c = (
-                unicodedata.normalize("NFKD", c)
-                .encode("ascii", "ignore")
-                .decode("ascii", "ignore")
-            )
         for sc in c:
-            if ALPHABET is not None and not ALPHABET.has_char(c):
+            if not in_alphabet(c):
                 return None
             chars.append(sc)
     return validate_label("".join(chars))
@@ -122,6 +118,7 @@ def write_csvs(extracted):
                 sentence = list(meta.iter("cleaned_sentence"))[0].text
                 sentence = check_and_prepare_sentence(sentence)
                 if sentence is None:
+                    reasons['alphabet filter'] += 1
                     continue
                 for wav_name in wav_names:
                     sample_counter += 1