





import os
from dataclasses import dataclass, field
from io import BytesIO
from typing import TYPE_CHECKING, Any, ClassVar, Dict, Optional, Union

import numpy as np
import pyarrow as pa

from .. import config
from ..download.streaming_download_manager import xopen, xsplitext
from ..table import array_cast
from ..utils.py_utils import no_op_if_value_is_null, string_to_dict


if TYPE_CHECKING:
							from .features import FeatureType


UpperCAmelCase__				,UpperCAmelCase__				,UpperCAmelCase__						:			str									=False, False, False

@dataclass
class       __A     :
				__A      =				None
				__A      =				True
				__A      =				True
				__A      =				None
				# Automatically constructed
				__A      =				"""dict"""
				__A      =				pa.struct({"""bytes""": pa.binary(), """path""": pa.string()}    )
				__A      =				field(default="""Audio"""    ,					init=__A    ,					repr=__A    )


				def __call__(		self							):
					return self.pa_type


				def _snake_case       (		self   , UpperCAmelCase_							):

					try:
						import soundfile as sf  # soundfile is a dependency of librosa, needed to decode audio files.
					except ImportError as err:
						raise ImportError("""To support encoding audio data, please install \'soundfile\'."""							) from err
					if isinstance(UpperCAmelCase_   , UpperCAmelCase_							):
						return {"bytes": None, "path": value}
					elif isinstance(UpperCAmelCase_   , UpperCAmelCase_							):
						return {"bytes": value, "path": None}
					elif "array" in value:
						# convert the audio array to wav bytes
						lowerCamelCase	 =BytesIO()
						sf.write(UpperCAmelCase_   , value["""array"""]   , value["""sampling_rate"""]   , format="""wav"""							)
						return {"bytes": buffer.getvalue(), "path": None}
					elif value.get("""path"""							) is not None and os.path.isfile(value["""path"""]							):
						# we set "bytes": None to not duplicate the data if they're already available locally
						if value["path"].endswith("""pcm"""							):
							# "PCM" only has raw audio bytes
							if value.get("""sampling_rate"""							) is None:
								# At least, If you want to convert "PCM-byte" to "WAV-byte", you have to know sampling rate
								raise KeyError("""To use PCM files, please specify a \'sampling_rate\' in Audio object"""							)
							if value.get("""bytes"""							):
								# If we already had PCM-byte, we don`t have to make "read file, make bytes" (just use it!)
								lowerCamelCase	 =np.frombuffer(value["""bytes"""]   , dtype=np.intaa							).astype(np.floataa							) / 32767
							else:
								lowerCamelCase	 =np.memmap(value["""path"""]   , dtype="""h"""   , mode="""r"""							).astype(np.floataa							) / 32767

							lowerCamelCase	 =BytesIO(bytes()							)
							sf.write(UpperCAmelCase_   , UpperCAmelCase_   , value["""sampling_rate"""]   , format="""wav"""							)
							return {"bytes": buffer.getvalue(), "path": None}
						else:
							return {"bytes": None, "path": value.get("""path"""							)}
					elif value.get("""bytes"""							) is not None or value.get("""path"""							) is not None:
						# store the audio bytes, and path is used to infer the audio format using the file extension
						return {"bytes": value.get("""bytes"""							), "path": value.get("""path"""							)}
					else:
						raise ValueError(
						    f"""An audio sample should have one of \'path\' or \'bytes\' but they are missing or None in {value}."""							)


				def _snake_case       (		self   , UpperCAmelCase_   , UpperCAmelCase_ = None							):

					if not self.decode:
						raise RuntimeError("""Decoding is disabled for this feature. Please use Audio(decode=True) instead."""							)

					lowerCamelCase	 =(value['''path'''], BytesIO(value["""bytes"""]							)) if value['''bytes'''] is not None else (value['''path'''], None)
					if path is None and file is None:
						raise ValueError(f"""An audio sample should have one of \'path\' or \'bytes\' but both are None in {value}."""							)

					try:
						import librosa
						import soundfile as sf
					except ImportError as err:
						raise ImportError("""To support decoding audio files, please install \'librosa\' and \'soundfile\'."""							) from err

					lowerCamelCase	 =xsplitext(UpperCAmelCase_							)[1][1:].lower() if path is not None else None
					if not config.IS_OPUS_SUPPORTED and audio_format == "opus":
						raise RuntimeError(
						    """Decoding \'opus\' files requires system library \'libsndfile\'>=1.0.31, """
						    """You can try to update `soundfile` python library: `pip install \"soundfile>=0.12.1\"`. """							)
					elif not config.IS_MP3_SUPPORTED and audio_format == "mp3":
						raise RuntimeError(
						    """Decoding \'mp3\' files requires system library \'libsndfile\'>=1.1.0, """
						    """You can try to update `soundfile` python library: `pip install \"soundfile>=0.12.1\"`. """							)

					if file is None:
						lowerCamelCase	 =token_per_repo_id or {}
						lowerCamelCase	 =path.split("""::"""							)[-1]
						try:
							lowerCamelCase	 =string_to_dict(UpperCAmelCase_   , config.HUB_DATASETS_URL							)['''repo_id''']
							lowerCamelCase	 =token_per_repo_id[repo_id]
						except (ValueError, KeyError):
							lowerCamelCase	 =None

						with xopen(UpperCAmelCase_   , """rb"""   , use_auth_token=UpperCAmelCase_							) as f:
							lowerCamelCase	 =sf.read(UpperCAmelCase_							)

					else:
						lowerCamelCase	 =sf.read(UpperCAmelCase_							)

					lowerCamelCase	 =array.T
					if self.mono:
						lowerCamelCase	 =librosa.to_mono(UpperCAmelCase_							)
					if self.sampling_rate and self.sampling_rate != sampling_rate:
						lowerCamelCase	 =librosa.resample(UpperCAmelCase_   , orig_sr=UpperCAmelCase_   , target_sr=self.sampling_rate							)
						lowerCamelCase	 =self.sampling_rate

					return {"path": path, "array": array, "sampling_rate": sampling_rate}


				def _snake_case       (		self							):
					from .features import Value

					if self.decode:
						raise ValueError("""Cannot flatten a decoded Audio feature."""							)
					return {
					    "bytes": Value("""binary"""							),
					    "path": Value("""string"""							),
					}


				def _snake_case       (		self   , UpperCAmelCase_							):

					if pa.types.is_string(storage.type							):
						lowerCamelCase	 =pa.array([None] * len(UpperCAmelCase_							)   , type=pa.binary()							)
						lowerCamelCase	 =pa.StructArray.from_arrays([bytes_array, storage]   , ["""bytes""", """path"""]   , mask=storage.is_null()							)
					elif pa.types.is_binary(storage.type							):
						lowerCamelCase	 =pa.array([None] * len(UpperCAmelCase_							)   , type=pa.string()							)
						lowerCamelCase	 =pa.StructArray.from_arrays([storage, path_array]   , ["""bytes""", """path"""]   , mask=storage.is_null()							)
					elif pa.types.is_struct(storage.type							) and storage.type.get_all_field_indices("""array"""							):
						lowerCamelCase	 =pa.array([Audio().encode_example(UpperCAmelCase_							) if x is not None else None for x in storage.to_pylist()]							)
					elif pa.types.is_struct(storage.type							):
						if storage.type.get_field_index("""bytes"""							) >= 0:
							lowerCamelCase	 =storage.field("""bytes"""							)
						else:
							lowerCamelCase	 =pa.array([None] * len(UpperCAmelCase_							)   , type=pa.binary()							)
						if storage.type.get_field_index("""path"""							) >= 0:
							lowerCamelCase	 =storage.field("""path"""							)
						else:
							lowerCamelCase	 =pa.array([None] * len(UpperCAmelCase_							)   , type=pa.string()							)
						lowerCamelCase	 =pa.StructArray.from_arrays([bytes_array, path_array]   , ["""bytes""", """path"""]   , mask=storage.is_null()							)
					return array_cast(UpperCAmelCase_   , self.pa_type							)


				def _snake_case       (		self   , UpperCAmelCase_							):

					@no_op_if_value_is_null
					def path_to_bytes(UpperCAmelCase_							):
						with xopen(UpperCAmelCase_   , """rb"""							) as f:
							lowerCamelCase	 =f.read()
						return bytes_

					lowerCamelCase	 =pa.array(
					    [
					        (path_to_bytes(x["""path"""]							) if x["""bytes"""] is None else x["""bytes"""]) if x is not None else None
					        for x in storage.to_pylist()
					    ]   , type=pa.binary()   , )
					lowerCamelCase	 =pa.array(
					    [os.path.basename(UpperCAmelCase_							) if path is not None else None for path in storage.field("""path"""							).to_pylist()]   , type=pa.string()   , )
					lowerCamelCase	 =pa.StructArray.from_arrays([bytes_array, path_array]   , ["""bytes""", """path"""]   , mask=bytes_array.is_null()							)
					return array_cast(UpperCAmelCase_   , self.pa_type							)












def      _lowercase					(						_UpperCAmelCase			,      _UpperCAmelCase				)						->  list[str]:
				return [sentence[i : i + ngram_size] for i in range(len(_UpperCAmelCase				) - ngram_size + 1				)]


if __name__ == "__main__":
							from doctest import testmod

							testmod()





