Class: Google::Cloud::Speech::V1::SpeechClient

Inherits:
Object
  • Object
show all
Defined in:
lib/google/cloud/speech/v1/speech_client.rb

Overview

Service that implements Google Cloud Speech API.

Constant Summary collapse

SERVICE_ADDRESS =

The default address of the service.

"speech.googleapis.com".freeze
DEFAULT_SERVICE_PORT =

The default port of the service.

443
DEFAULT_TIMEOUT = 
30
ALL_SCOPES =

The scopes needed to make gRPC calls to all of the methods defined in this service.

[
  "https://www.googleapis.com/auth/cloud-platform"
].freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(service_path: SERVICE_ADDRESS, port: DEFAULT_SERVICE_PORT, channel: nil, chan_creds: nil, updater_proc: nil, scopes: ALL_SCOPES, client_config: {}, timeout: DEFAULT_TIMEOUT, app_name: nil, app_version: nil, lib_name: nil, lib_version: "") ⇒ SpeechClient

Returns a new instance of SpeechClient

Parameters:

  • service_path (String) —

    The domain name of the API remote host.

  • port (Integer) —

    The port on which to connect to the remote host.

  • channel (Channel) —

    A Channel object through which to make calls.

  • chan_creds (Grpc::ChannelCredentials) —

    A ChannelCredentials for the setting up the RPC client.

  • updater_proc (Proc) —

    A function that transforms the metadata for requests, e.g., to give OAuth credentials.

  • scopes (Array<String>) —

    The OAuth scopes for this service. This parameter is ignored if an updater_proc is supplied.

  • client_config (Hash) —

    A Hash for call options for each method. See Google::Gax#construct_settings for the structure of this data. Falls back to the default config if not specified or the specified config is missing data points.

  • timeout (Numeric) —

    The default timeout, in seconds, for calls made through this client.



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# File 'lib/google/cloud/speech/v1/speech_client.rb', line 80

def initialize \
    service_path: SERVICE_ADDRESS,
    port: DEFAULT_SERVICE_PORT,
    channel: nil,
    chan_creds: nil,
    updater_proc: nil,
    scopes: ALL_SCOPES,
    client_config: {},
    timeout: DEFAULT_TIMEOUT,
    app_name: nil,
    app_version: nil,
    lib_name: nil,
    lib_version: ""
  # These require statements are intentionally placed here to initialize
  # the gRPC module only when it's required.
  # See https://github.com/googleapis/toolkit/issues/446
  require "google/gax/grpc"
  require "google/cloud/speech/v1/cloud_speech_services_pb"

  @operations_client = Google::Longrunning::OperationsClient.new(
    service_path: service_path,
    port: port,
    channel: channel,
    chan_creds: chan_creds,
    updater_proc: updater_proc,
    scopes: scopes,
    client_config: client_config,
    timeout: timeout,
    app_name: app_name,
    app_version: app_version,
    lib_name: lib_name,
    lib_version: lib_version,
  )

  if app_name || app_version
    warn "`app_name` and `app_version` are no longer being used in the request headers."
  end

  google_api_client = "gl-ruby/#{RUBY_VERSION}"
  google_api_client << " #{lib_name}/#{lib_version}" if lib_name
  google_api_client << " gapic/0.6.8 gax/#{Google::Gax::VERSION}"
  google_api_client << " grpc/#{GRPC::VERSION}"
  google_api_client.freeze

  headers = { :"x-goog-api-client" => google_api_client }
  client_config_file = Pathname.new(__dir__).join(
    "speech_client_config.json"
  )
  defaults = client_config_file.open do |f|
    Google::Gax.construct_settings(
      "google.cloud.speech.v1.Speech",
      JSON.parse(f.read),
      client_config,
      Google::Gax::Grpc::STATUS_CODE_NAMES,
      timeout,
      errors: Google::Gax::Grpc::API_ERRORS,
      kwargs: headers
    )
  end
  @speech_stub = Google::Gax::Grpc.create_stub(
    service_path,
    port,
    chan_creds: chan_creds,
    channel: channel,
    updater_proc: updater_proc,
    scopes: scopes,
    &Google::Cloud::Speech::V1::Speech::Stub.method(:new)
  )

  @recognize = Google::Gax.create_api_call(
    @speech_stub.method(:recognize),
    defaults["recognize"]
  )
  @long_running_recognize = Google::Gax.create_api_call(
    @speech_stub.method(:long_running_recognize),
    defaults["long_running_recognize"]
  )
  @streaming_recognize = Google::Gax.create_api_call(
    @speech_stub.method(:streaming_recognize),
    defaults["streaming_recognize"]
  )
end

Instance Attribute Details

#speech_stub ⇒ Google::Cloud::Speech::V1::Speech::Stub (readonly)

Returns:



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# File 'lib/google/cloud/speech/v1/speech_client.rb', line 42

class SpeechClient
  attr_reader :speech_stub

  # The default address of the service.
  SERVICE_ADDRESS = "speech.googleapis.com".freeze

  # The default port of the service.
  DEFAULT_SERVICE_PORT = 443

  DEFAULT_TIMEOUT = 30

  # The scopes needed to make gRPC calls to all of the methods defined in
  # this service.
  ALL_SCOPES = [
    "https://www.googleapis.com/auth/cloud-platform"
  ].freeze

  # @param service_path [String]
  #   The domain name of the API remote host.
  # @param port [Integer]
  #   The port on which to connect to the remote host.
  # @param channel [Channel]
  #   A Channel object through which to make calls.
  # @param chan_creds [Grpc::ChannelCredentials]
  #   A ChannelCredentials for the setting up the RPC client.
  # @param updater_proc [Proc]
  #   A function that transforms the metadata for requests, e.g., to give
  #   OAuth credentials.
  # @param scopes [Array<String>]
  #   The OAuth scopes for this service. This parameter is ignored if
  #   an updater_proc is supplied.
  # @param client_config[Hash]
  #   A Hash for call options for each method. See
  #   Google::Gax#construct_settings for the structure of
  #   this data. Falls back to the default config if not specified
  #   or the specified config is missing data points.
  # @param timeout [Numeric]
  #   The default timeout, in seconds, for calls made through this client.
  def initialize \
      service_path: SERVICE_ADDRESS,
      port: DEFAULT_SERVICE_PORT,
      channel: nil,
      chan_creds: nil,
      updater_proc: nil,
      scopes: ALL_SCOPES,
      client_config: {},
      timeout: DEFAULT_TIMEOUT,
      app_name: nil,
      app_version: nil,
      lib_name: nil,
      lib_version: ""
    # These require statements are intentionally placed here to initialize
    # the gRPC module only when it's required.
    # See https://github.com/googleapis/toolkit/issues/446
    require "google/gax/grpc"
    require "google/cloud/speech/v1/cloud_speech_services_pb"

    @operations_client = Google::Longrunning::OperationsClient.new(
      service_path: service_path,
      port: port,
      channel: channel,
      chan_creds: chan_creds,
      updater_proc: updater_proc,
      scopes: scopes,
      client_config: client_config,
      timeout: timeout,
      app_name: app_name,
      app_version: app_version,
      lib_name: lib_name,
      lib_version: lib_version,
    )

    if app_name || app_version
      warn "`app_name` and `app_version` are no longer being used in the request headers."
    end

    google_api_client = "gl-ruby/#{RUBY_VERSION}"
    google_api_client << " #{lib_name}/#{lib_version}" if lib_name
    google_api_client << " gapic/0.6.8 gax/#{Google::Gax::VERSION}"
    google_api_client << " grpc/#{GRPC::VERSION}"
    google_api_client.freeze

    headers = { :"x-goog-api-client" => google_api_client }
    client_config_file = Pathname.new(__dir__).join(
      "speech_client_config.json"
    )
    defaults = client_config_file.open do |f|
      Google::Gax.construct_settings(
        "google.cloud.speech.v1.Speech",
        JSON.parse(f.read),
        client_config,
        Google::Gax::Grpc::STATUS_CODE_NAMES,
        timeout,
        errors: Google::Gax::Grpc::API_ERRORS,
        kwargs: headers
      )
    end
    @speech_stub = Google::Gax::Grpc.create_stub(
      service_path,
      port,
      chan_creds: chan_creds,
      channel: channel,
      updater_proc: updater_proc,
      scopes: scopes,
      &Google::Cloud::Speech::V1::Speech::Stub.method(:new)
    )

    @recognize = Google::Gax.create_api_call(
      @speech_stub.method(:recognize),
      defaults["recognize"]
    )
    @long_running_recognize = Google::Gax.create_api_call(
      @speech_stub.method(:long_running_recognize),
      defaults["long_running_recognize"]
    )
    @streaming_recognize = Google::Gax.create_api_call(
      @speech_stub.method(:streaming_recognize),
      defaults["streaming_recognize"]
    )
  end

  # Service calls

  # Performs synchronous speech recognition: receive results after all audio
  # has been sent and processed.
  #
  # @param config [Google::Cloud::Speech::V1::RecognitionConfig]
  #   *Required* Provides information to the recognizer that specifies how to
  #   process the request.
  # @param audio [Google::Cloud::Speech::V1::RecognitionAudio]
  #   *Required* The audio data to be recognized.
  # @param options [Google::Gax::CallOptions]
  #   Overrides the default settings for this call, e.g, timeout,
  #   retries, etc.
  # @return [Google::Cloud::Speech::V1::RecognizeResponse]
  # @raise [Google::Gax::GaxError] if the RPC is aborted.
  # @example
  #   require "google/cloud/speech/v1"
  #
  #   AudioEncoding = Google::Cloud::Speech::V1::RecognitionConfig::AudioEncoding
  #   RecognitionAudio = Google::Cloud::Speech::V1::RecognitionAudio
  #   RecognitionConfig = Google::Cloud::Speech::V1::RecognitionConfig
  #   SpeechClient = Google::Cloud::Speech::V1::SpeechClient
  #
  #   speech_client = SpeechClient.new
  #   encoding = AudioEncoding::FLAC
  #   sample_rate_hertz = 44100
  #   language_code = "en-US"
  #   config = RecognitionConfig.new
  #   config.encoding = encoding
  #   config.sample_rate_hertz = sample_rate_hertz
  #   config.language_code = language_code
  #   uri = "gs://bucket_name/file_name.flac"
  #   audio = RecognitionAudio.new
  #   audio.uri = uri
  #   response = speech_client.recognize(config, audio)

  def recognize \
      config,
      audio,
      options: nil
    req = Google::Cloud::Speech::V1::RecognizeRequest.new({
      config: config,
      audio: audio
    }.delete_if { |_, v| v.nil? })
    @recognize.call(req, options)
  end

  # Performs asynchronous speech recognition: receive results via the
  # google.longrunning.Operations interface. Returns either an
  # +Operation.error+ or an +Operation.response+ which contains
  # a +LongRunningRecognizeResponse+ message.
  #
  # @param config [Google::Cloud::Speech::V1::RecognitionConfig]
  #   *Required* Provides information to the recognizer that specifies how to
  #   process the request.
  # @param audio [Google::Cloud::Speech::V1::RecognitionAudio]
  #   *Required* The audio data to be recognized.
  # @param options [Google::Gax::CallOptions]
  #   Overrides the default settings for this call, e.g, timeout,
  #   retries, etc.
  # @return [Google::Gax::Operation]
  # @raise [Google::Gax::GaxError] if the RPC is aborted.
  # @example
  #   require "google/cloud/speech/v1"
  #
  #   AudioEncoding = Google::Cloud::Speech::V1::RecognitionConfig::AudioEncoding
  #   RecognitionAudio = Google::Cloud::Speech::V1::RecognitionAudio
  #   RecognitionConfig = Google::Cloud::Speech::V1::RecognitionConfig
  #   SpeechClient = Google::Cloud::Speech::V1::SpeechClient
  #
  #   speech_client = SpeechClient.new
  #   encoding = AudioEncoding::FLAC
  #   sample_rate_hertz = 44100
  #   language_code = "en-US"
  #   config = RecognitionConfig.new
  #   config.encoding = encoding
  #   config.sample_rate_hertz = sample_rate_hertz
  #   config.language_code = language_code
  #   uri = "gs://bucket_name/file_name.flac"
  #   audio = RecognitionAudio.new
  #   audio.uri = uri
  #
  #   # Register a callback during the method call.
  #   operation = speech_client.long_running_recognize(config, audio) do |op|
  #     raise op.results.message if op.error?
  #     op_results = op.results
  #     # Process the results.
  #
  #     metadata = op.metadata
  #     # Process the metadata.
  #   end
  #
  #   # Or use the return value to register a callback.
  #   operation.on_done do |op|
  #     raise op.results.message if op.error?
  #     op_results = op.results
  #     # Process the results.
  #
  #     metadata = op.metadata
  #     # Process the metadata.
  #   end
  #
  #   # Manually reload the operation.
  #   operation.reload!
  #
  #   # Or block until the operation completes, triggering callbacks on
  #   # completion.
  #   operation.wait_until_done!

  def long_running_recognize \
      config,
      audio,
      options: nil
    req = Google::Cloud::Speech::V1::LongRunningRecognizeRequest.new({
      config: config,
      audio: audio
    }.delete_if { |_, v| v.nil? })
    operation = Google::Gax::Operation.new(
      @long_running_recognize.call(req, options),
      @operations_client,
      Google::Cloud::Speech::V1::LongRunningRecognizeResponse,
      Google::Cloud::Speech::V1::LongRunningRecognizeMetadata,
      call_options: options
    )
    operation.on_done { |operation| yield(operation) } if block_given?
    operation
  end

  # Performs bidirectional streaming speech recognition: receive results while
  # sending audio. This method is only available via the gRPC API (not REST).
  #
  # @param reqs [Enumerable<Google::Cloud::Speech::V1::StreamingRecognizeRequest>]
  #   The input requests.
  # @param options [Google::Gax::CallOptions]
  #   Overrides the default settings for this call, e.g, timeout,
  #   retries, etc.
  # @return [Enumerable<Google::Cloud::Speech::V1::StreamingRecognizeResponse>]
  #   An enumerable of Google::Cloud::Speech::V1::StreamingRecognizeResponse instances.
  #
  # @raise [Google::Gax::GaxError] if the RPC is aborted.
  #
  # @note
  #   EXPERIMENTAL:
  #     Streaming requests are still undergoing review.
  #     This method interface might change in the future.
  #
  # @example
  #   require "google/cloud/speech/v1"
  #
  #   SpeechClient = Google::Cloud::Speech::V1::SpeechClient
  #   StreamingRecognizeRequest = Google::Cloud::Speech::V1::StreamingRecognizeRequest
  #
  #   speech_client = SpeechClient.new
  #   request = StreamingRecognizeRequest.new
  #   requests = [request]
  #   speech_client.streaming_recognize(requests).each do |element|
  #     # Process element.
  #   end

  def streaming_recognize reqs, options: nil
    @streaming_recognize.call(reqs, options)
  end
end

Instance Method Details

#long_running_recognize(config, audio, options: nil) ⇒ Google::Gax::Operation

Performs asynchronous speech recognition: receive results via the google.longrunning.Operations interface. Returns either an +Operation.error+ or an +Operation.response+ which contains a +LongRunningRecognizeResponse+ message.

Examples:

require "google/cloud/speech/v1"

AudioEncoding = Google::Cloud::Speech::V1::RecognitionConfig::AudioEncoding
RecognitionAudio = Google::Cloud::Speech::V1::RecognitionAudio
RecognitionConfig = Google::Cloud::Speech::V1::RecognitionConfig
SpeechClient = Google::Cloud::Speech::V1::SpeechClient

speech_client = SpeechClient.new
encoding = AudioEncoding::FLAC
sample_rate_hertz = 44100
language_code = "en-US"
config = RecognitionConfig.new
config.encoding = encoding
config.sample_rate_hertz = sample_rate_hertz
config.language_code = language_code
uri = "gs://bucket_name/file_name.flac"
audio = RecognitionAudio.new
audio.uri = uri

# Register a callback during the method call.
operation = speech_client.long_running_recognize(config, audio) do |op|
  raise op.results.message if op.error?
  op_results = op.results
  # Process the results.

  metadata = op.metadata
  # Process the metadata.
end

# Or use the return value to register a callback.
operation.on_done do |op|
  raise op.results.message if op.error?
  op_results = op.results
  # Process the results.

  metadata = op.metadata
  # Process the metadata.
end

# Manually reload the operation.
operation.reload!

# Or block until the operation completes, triggering callbacks on
# completion.
operation.wait_until_done!

Parameters:

Returns:

  • (Google::Gax::Operation)

Raises:

  • (Google::Gax::GaxError) —

    if the RPC is aborted.



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# File 'lib/google/cloud/speech/v1/speech_client.rb', line 272

def long_running_recognize \
    config,
    audio,
    options: nil
  req = Google::Cloud::Speech::V1::LongRunningRecognizeRequest.new({
    config: config,
    audio: audio
  }.delete_if { |_, v| v.nil? })
  operation = Google::Gax::Operation.new(
    @long_running_recognize.call(req, options),
    @operations_client,
    Google::Cloud::Speech::V1::LongRunningRecognizeResponse,
    Google::Cloud::Speech::V1::LongRunningRecognizeMetadata,
    call_options: options
  )
  operation.on_done { |operation| yield(operation) } if block_given?
  operation
end

#recognize(config, audio, options: nil) ⇒ Google::Cloud::Speech::V1::RecognizeResponse

Performs synchronous speech recognition: receive results after all audio has been sent and processed.

Examples:

require "google/cloud/speech/v1"

AudioEncoding = Google::Cloud::Speech::V1::RecognitionConfig::AudioEncoding
RecognitionAudio = Google::Cloud::Speech::V1::RecognitionAudio
RecognitionConfig = Google::Cloud::Speech::V1::RecognitionConfig
SpeechClient = Google::Cloud::Speech::V1::SpeechClient

speech_client = SpeechClient.new
encoding = AudioEncoding::FLAC
sample_rate_hertz = 44100
language_code = "en-US"
config = RecognitionConfig.new
config.encoding = encoding
config.sample_rate_hertz = sample_rate_hertz
config.language_code = language_code
uri = "gs://bucket_name/file_name.flac"
audio = RecognitionAudio.new
audio.uri = uri
response = speech_client.recognize(config, audio)

Parameters:

Returns:

Raises:

  • (Google::Gax::GaxError) —

    if the RPC is aborted.



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# File 'lib/google/cloud/speech/v1/speech_client.rb', line 199

def recognize \
    config,
    audio,
    options: nil
  req = Google::Cloud::Speech::V1::RecognizeRequest.new({
    config: config,
    audio: audio
  }.delete_if { |_, v| v.nil? })
  @recognize.call(req, options)
end

#streaming_recognize(reqs, options: nil) ⇒ Enumerable<Google::Cloud::Speech::V1::StreamingRecognizeResponse>

Note:

EXPERIMENTAL: Streaming requests are still undergoing review. This method interface might change in the future.

Performs bidirectional streaming speech recognition: receive results while sending audio. This method is only available via the gRPC API (not REST).

Examples:

require "google/cloud/speech/v1"

SpeechClient = Google::Cloud::Speech::V1::SpeechClient
StreamingRecognizeRequest = Google::Cloud::Speech::V1::StreamingRecognizeRequest

speech_client = SpeechClient.new
request = StreamingRecognizeRequest.new
requests = [request]
speech_client.streaming_recognize(requests).each do |element|
  # Process element.
end

Parameters:

Returns:

Raises:

  • (Google::Gax::GaxError) —

    if the RPC is aborted.



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# File 'lib/google/cloud/speech/v1/speech_client.rb', line 322

def streaming_recognize reqs, options: nil
  @streaming_recognize.call(reqs, options)
end