



from typing import List

import jiwer
import jiwer.transforms as tr
from packaging import version

import datasets
from datasets.config import PY_VERSION


if PY_VERSION < version.parse('''3.8'''):
			import importlib_metadata
else:
			import importlib.metadata as importlib_metadata


lowerCAmelCase__		:					Optional[Any]							=''''''


if version.parse(importlib_metadata.version('''jiwer''')) < version.parse('''2.3.0'''):

			class        UpperCAmelCase_  (       tr.AbstractTransform	):

									'''simple docstring'''




									def __init__(   self				,							_A = " "		):







																'''simple docstring'''

																__SCREAMING_SNAKE_CASE									= sentence_delimiter






									def 	_A     (   self				,							_A		):







																'''simple docstring'''

																return list(_A		)






									def 	_A     (   self				,							_A		):







																'''simple docstring'''

																__SCREAMING_SNAKE_CASE									= []
																for sent_idx, sentence in enumerate(_A		):
																							chars.extend(self.process_string(_A		)		)
																							if self.sentence_delimiter is not None and self.sentence_delimiter != "" and sent_idx < len(_A		) - 1:
																														chars.append(self.sentence_delimiter		)
																return chars







			lowerCAmelCase__		:					str							=tr.Compose(
			    [tr.RemoveMultipleSpaces(), tr.Strip(), SentencesToListOfCharacters(SENTENCE_DELIMITER)]
			)
else:
			lowerCAmelCase__		:					Optional[Any]							=tr.Compose(
			    [
			        tr.RemoveMultipleSpaces(),
			        tr.Strip(),
			        tr.ReduceToSingleSentence(SENTENCE_DELIMITER),
			        tr.ReduceToListOfListOfChars(),
			    ]
			)


lowerCAmelCase__		:					List[Any]							='''\
@inproceedings{inproceedings,
    author = {Morris, Andrew and Maier, Viktoria and Green, Phil},
    year = {2004},
    month = {01},
    pages = {},
    title = {From WER and RIL to MER and WIL: improved evaluation measures for connected speech recognition.}
}
'''

lowerCAmelCase__		:					Any							='''\
Character error rate (CER) is a common metric of the performance of an automatic speech recognition system.

CER is similar to Word Error Rate (WER), but operates on character instead of word. Please refer to docs of WER for further information.

Character error rate can be computed as:

CER = (S + D + I) / N = (S + D + I) / (S + D + C)

where

S is the number of substitutions,
D is the number of deletions,
I is the number of insertions,
C is the number of correct characters,
N is the number of characters in the reference (N=S+D+C).

CER\'s output is not always a number between 0 and 1, in particular when there is a high number of insertions. This value is often associated to the percentage of characters that were incorrectly predicted. The lower the value, the better the
performance of the ASR system with a CER of 0 being a perfect score.
'''

lowerCAmelCase__		:					Optional[int]							='''
Computes CER score of transcribed segments against references.
Args:
    references: list of references for each speech input.
    predictions: list of transcribtions to score.
    concatenate_texts: Whether or not to concatenate sentences before evaluation, set to True for more accurate result.
Returns:
    (float): the character error rate

Examples:

    >>> predictions = ["this is the prediction", "there is an other sample"]
    >>> references = ["this is the reference", "there is another one"]
    >>> cer = datasets.load_metric("cer")
    >>> cer_score = cer.compute(predictions=predictions, references=references)
    >>> print(cer_score)
    0.34146341463414637
'''

@datasets.utils.file_utils.add_start_docstrings(_DESCRIPTION   ,   _KWARGS_DESCRIPTION	)
class        UpperCAmelCase_  (       datasets.Metric	):

						'''simple docstring'''




						def 	_A     (   self		):







													'''simple docstring'''

													return datasets.MetricInfo(
													    description=_DESCRIPTION				,							citation=_CITATION				,							inputs_description=_KWARGS_DESCRIPTION				,							features=datasets.Features(
													        {
													            'predictions': datasets.Value('string'				,							id='sequence'		),
													            'references': datasets.Value('string'				,							id='sequence'		),
													        }		)				,							codebase_urls=['https://github.com/jitsi/jiwer/']				,							reference_urls=[
													        'https://en.wikipedia.org/wiki/Word_error_rate',
													        'https://sites.google.com/site/textdigitisation/qualitymeasures/computingerrorrates',
													    ]				,							)






						def 	_A     (   self				,							_A				,							_A				,							_A=False		):







													'''simple docstring'''

													if concatenate_texts:
																				return jiwer.compute_measures(
																				    _A				,							_A				,							truth_transform=_A				,							hypothesis_transform=_A				,							)["wer"]

													__SCREAMING_SNAKE_CASE									= 0
													__SCREAMING_SNAKE_CASE									= 0
													for prediction, reference in zip(_A				,							_A		):
																				__SCREAMING_SNAKE_CASE									= jiwer.compute_measures(
																				    _A				,							_A				,							truth_transform=_A				,							hypothesis_transform=_A				,							)
																				incorrect += measures["substitutions"] + measures["deletions"] + measures["insertions"]
																				total += measures["substitutions"] + measures["deletions"] + measures["hits"]

													return incorrect / total











import warnings
from contextlib import contextmanager

from ...processing_utils import ProcessorMixin
from .feature_extraction_wavaveca import WavaVecaFeatureExtractor
from .tokenization_wavaveca import WavaVecaCTCTokenizer

class        UpperCAmelCase_  (       UpperCamelCase_	):

						'''simple docstring'''




						UpperCamelCase__      :			Union[str, Any]      =  '''Wav2Vec2FeatureExtractor'''
						UpperCamelCase__      :			Union[str, Any]      =  '''AutoTokenizer'''






						def __init__(   self				,							_A				,							_A		):







													'''simple docstring'''

													super().__init__(_A				,							_A		)
													__SCREAMING_SNAKE_CASE									= self.feature_extractor
													__SCREAMING_SNAKE_CASE									= False






						@classmethod
						def 	_A     (   cls				,							_A				,							**_A		):







													'''simple docstring'''

													try:
																				return super().from_pretrained(_A				,							**_A		)
													except OSError:
																				warnings.warn(
																				    f"""Loading a tokenizer inside {cls.__name__} from a config that does not"""
																				    ' include a `tokenizer_class` attribute is deprecated and will be '
																				    'removed in v5. Please add `\'tokenizer_class\': \'Wav2Vec2CTCTokenizer\'`'
																				    ' attribute to either your `config.json` or `tokenizer_config.json` '
																				    'file to suppress this warning: '				,							_A				,							)

																				__SCREAMING_SNAKE_CASE									= WavaVecaFeatureExtractor.from_pretrained(_A				,							**_A		)
																				__SCREAMING_SNAKE_CASE									= WavaVecaCTCTokenizer.from_pretrained(_A				,							**_A		)

																				return cls(feature_extractor=_A				,							tokenizer=_A		)






						def __call__(   self				,							*_A				,							**_A		):







													'''simple docstring'''

													if self._in_target_context_manager:
																				return self.current_processor(*_A				,							**_A		)

													if "raw_speech" in kwargs:
																				warnings.warn('Using `raw_speech` as a keyword argument is deprecated. Use `audio` instead.'		)
																				__SCREAMING_SNAKE_CASE									= kwargs.pop('raw_speech'		)
													else:
																				__SCREAMING_SNAKE_CASE									= kwargs.pop('audio'				,							_A		)
													__SCREAMING_SNAKE_CASE									= kwargs.pop('sampling_rate'				,							_A		)
													__SCREAMING_SNAKE_CASE									= kwargs.pop('text'				,							_A		)
													if len(_A		) > 0:
																				__SCREAMING_SNAKE_CASE									= args[0]
																				__SCREAMING_SNAKE_CASE									= args[1:]

													if audio is None and text is None:
																				raise ValueError('You need to specify either an `audio` or `text` input to process.'		)

													if audio is not None:
																				__SCREAMING_SNAKE_CASE									= self.feature_extractor(_A				,							*_A				,							sampling_rate=_A				,							**_A		)
													if text is not None:
																				__SCREAMING_SNAKE_CASE									= self.tokenizer(_A				,							**_A		)

													if text is None:
																				return inputs
													elif audio is None:
																				return encodings
													else:
																				__SCREAMING_SNAKE_CASE									= encodings['input_ids']
																				return inputs






						def 	_A     (   self				,							*_A				,							**_A		):







													'''simple docstring'''

													if self._in_target_context_manager:
																				return self.current_processor.pad(*_A				,							**_A		)

													__SCREAMING_SNAKE_CASE									= kwargs.pop('input_features'				,							_A		)
													__SCREAMING_SNAKE_CASE									= kwargs.pop('labels'				,							_A		)
													if len(_A		) > 0:
																				__SCREAMING_SNAKE_CASE									= args[0]
																				__SCREAMING_SNAKE_CASE									= args[1:]

													if input_features is not None:
																				__SCREAMING_SNAKE_CASE									= self.feature_extractor.pad(_A				,							*_A				,							**_A		)
													if labels is not None:
																				__SCREAMING_SNAKE_CASE									= self.tokenizer.pad(_A				,							**_A		)

													if labels is None:
																				return input_features
													elif input_features is None:
																				return labels
													else:
																				__SCREAMING_SNAKE_CASE									= labels['input_ids']
																				return input_features






						def 	_A     (   self				,							*_A				,							**_A		):







													'''simple docstring'''

													return self.tokenizer.batch_decode(*_A				,							**_A		)






						def 	_A     (   self				,							*_A				,							**_A		):







													'''simple docstring'''

													return self.tokenizer.decode(*_A				,							**_A		)






						@contextmanager
						def 	_A     (   self		):







													'''simple docstring'''

													warnings.warn(
													    '`as_target_processor` is deprecated and will be removed in v5 of Transformers. You can process your '
													    'labels by using the argument `text` of the regular `__call__` method (either in the same call as '
													    'your audio inputs, or in a separate call.'		)
													__SCREAMING_SNAKE_CASE									= True
													__SCREAMING_SNAKE_CASE									= self.tokenizer
													yield
													__SCREAMING_SNAKE_CASE									= self.feature_extractor
													__SCREAMING_SNAKE_CASE									= False






