Source code for airflow.providers.google.cloud.hooks.speech_to_text

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"""This module contains a Google Cloud Speech Hook."""
from __future__ import annotations

from typing import TYPE_CHECKING, Sequence

from google.api_core.gapic_v1.method import DEFAULT, _MethodDefault
from google.cloud.speech_v1 import SpeechClient
from google.cloud.speech_v1.types import RecognitionAudio, RecognitionConfig

from airflow.providers.google.common.consts import CLIENT_INFO
from airflow.providers.google.common.hooks.base_google import GoogleBaseHook

if TYPE_CHECKING:
    from google.api_core.retry import Retry



[docs]class CloudSpeechToTextHook(GoogleBaseHook):
    """
    Hook for Google Cloud Speech API.

    :param gcp_conn_id: The connection ID to use when fetching connection info.
    :param impersonation_chain: Optional service account to impersonate using short-term
        credentials, or chained list of accounts required to get the access_token
        of the last account in the list, which will be impersonated in the request.
        If set as a string, the account must grant the originating account
        the Service Account Token Creator IAM role.
        If set as a sequence, the identities from the list must grant
        Service Account Token Creator IAM role to the directly preceding identity, with first
        account from the list granting this role to the originating account.
    """

    def __init__(
        self,
        gcp_conn_id: str = "google_cloud_default",
        impersonation_chain: str | Sequence[str] | None = None,
        **kwargs,
    ) -> None:
        if kwargs.get("delegate_to") is not None:
            raise RuntimeError(
                "The `delegate_to` parameter has been deprecated before and finally removed in this version"
                " of Google Provider. You MUST convert it to `impersonate_chain`"
            )
        super().__init__(
            gcp_conn_id=gcp_conn_id,
            impersonation_chain=impersonation_chain,
        )
        self._client: SpeechClient | None = None


[docs]    def get_conn(self) -> SpeechClient:
        """
        Retrieves connection to Cloud Speech.

        :return: Google Cloud Speech client object.
        """
        if not self._client:
            self._client = SpeechClient(credentials=self.get_credentials(), client_info=CLIENT_INFO)
        return self._client


    @GoogleBaseHook.quota_retry()

[docs]    def recognize_speech(
        self,
        config: dict | RecognitionConfig,
        audio: dict | RecognitionAudio,
        retry: Retry | _MethodDefault = DEFAULT,
        timeout: float | None = None,
    ):
        """
        Recognizes audio input.

        :param config: information to the recognizer that specifies how to process the request.
            https://googleapis.github.io/google-cloud-python/latest/speech/gapic/v1/types.html#google.cloud.speech_v1.types.RecognitionConfig
        :param audio: audio data to be recognized
            https://googleapis.github.io/google-cloud-python/latest/speech/gapic/v1/types.html#google.cloud.speech_v1.types.RecognitionAudio
        :param retry: (Optional) A retry object used to retry requests. If None is specified,
            requests will not be retried.
        :param timeout: (Optional) The amount of time, in seconds, to wait for the request to complete.
            Note that if retry is specified, the timeout applies to each individual attempt.
        """
        client = self.get_conn()
        if isinstance(config, dict):
            config = RecognitionConfig(config)
        if isinstance(audio, dict):
            audio = RecognitionAudio(audio)

        response = client.recognize(config=config, audio=audio, retry=retry, timeout=timeout)
        self.log.info("Recognised speech: %s", response)
        return response

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