Class: Google::Cloud::Speech::V1p1beta1::SpeechClient

Inherits:
Object
  • Object
show all
Defined in:
lib/google/cloud/speech/v1p1beta1/speech_client.rb,
lib/google/cloud/speech/v1p1beta1/helpers.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
GRPC_INTERCEPTORS =

The default set of gRPC interceptors.

[]
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(credentials: nil, scopes: ALL_SCOPES, client_config: {}, timeout: DEFAULT_TIMEOUT, metadata: nil, exception_transformer: nil, lib_name: nil, lib_version: "") ⇒ SpeechClient

Returns a new instance of SpeechClient

Parameters:

  • credentials (Google::Auth::Credentials, String, Hash, GRPC::Core::Channel, GRPC::Core::ChannelCredentials, Proc) —

    Provides the means for authenticating requests made by the client. This parameter can be many types. A Google::Auth::Credentials uses a the properties of its represented keyfile for authenticating requests made by this client. A String will be treated as the path to the keyfile to be used for the construction of credentials for this client. A Hash will be treated as the contents of a keyfile to be used for the construction of credentials for this client. A GRPC::Core::Channel will be used to make calls through. A GRPC::Core::ChannelCredentials for the setting up the RPC client. The channel credentials should already be composed with a GRPC::Core::CallCredentials object. A Proc will be used as an updater_proc for the Grpc channel. The proc transforms the metadata for requests, generally, 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.

  • metadata (Hash) —

    Default metadata to be sent with each request. This can be overridden on a per call basis.

  • exception_transformer (Proc) —

    An optional proc that intercepts any exceptions raised during an API call to inject custom error handling.



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# File 'lib/google/cloud/speech/v1p1beta1/speech_client.rb', line 95

def initialize \
    credentials: nil,
    scopes: ALL_SCOPES,
    client_config: {},
    timeout: DEFAULT_TIMEOUT,
    metadata: nil,
    exception_transformer: 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/v1p1beta1/cloud_speech_services_pb"

  credentials ||= Google::Cloud::Speech::V1p1beta1::Credentials.default

  @operations_client = OperationsClient.new(
    credentials: credentials,
    scopes: scopes,
    client_config: client_config,
    timeout: timeout,
    lib_name: lib_name,
    lib_version: lib_version,
  )

  if credentials.is_a?(String) || credentials.is_a?(Hash)
    updater_proc = Google::Cloud::Speech::V1p1beta1::Credentials.new(credentials).updater_proc
  end
  if credentials.is_a?(GRPC::Core::Channel)
    channel = credentials
  end
  if credentials.is_a?(GRPC::Core::ChannelCredentials)
    chan_creds = credentials
  end
  if credentials.is_a?(Proc)
    updater_proc = credentials
  end
  if credentials.is_a?(Google::Auth::Credentials)
    updater_proc = credentials.updater_proc
  end

  package_version = Gem.loaded_specs['google-cloud-speech'].version.version

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

  headers = { :"x-goog-api-client" => google_api_client }
  headers.merge!(metadata) unless metadata.nil?
  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.v1p1beta1.Speech",
      JSON.parse(f.read),
      client_config,
      Google::Gax::Grpc::STATUS_CODE_NAMES,
      timeout,
      errors: Google::Gax::Grpc::API_ERRORS,
      metadata: headers
    )
  end

  # Allow overriding the service path/port in subclasses.
  service_path = self.class::SERVICE_ADDRESS
  port = self.class::DEFAULT_SERVICE_PORT
  interceptors = self.class::GRPC_INTERCEPTORS
  @speech_stub = Google::Gax::Grpc.create_stub(
    service_path,
    port,
    chan_creds: chan_creds,
    channel: channel,
    updater_proc: updater_proc,
    scopes: scopes,
    interceptors: interceptors,
    &Google::Cloud::Speech::V1p1beta1::Speech::Stub.method(:new)
  )

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

Instance Attribute Details

#speech_stub ⇒ Google::Cloud::Speech::V1p1beta1::Speech::Stub (readonly)

Returns:

  • (Google::Cloud::Speech::V1p1beta1::Speech::Stub) 


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# File 'lib/google/cloud/speech/v1p1beta1/speech_client.rb', line 40

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

  # The default set of gRPC interceptors.
  GRPC_INTERCEPTORS = []

  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

  # @private
  class OperationsClient < Google::Longrunning::OperationsClient
    self::SERVICE_ADDRESS = SpeechClient::SERVICE_ADDRESS
    self::GRPC_INTERCEPTORS = SpeechClient::GRPC_INTERCEPTORS
  end

  # @param credentials [Google::Auth::Credentials, String, Hash, GRPC::Core::Channel, GRPC::Core::ChannelCredentials, Proc]
  #   Provides the means for authenticating requests made by the client. This parameter can
  #   be many types.
  #   A `Google::Auth::Credentials` uses a the properties of its represented keyfile for
  #   authenticating requests made by this client.
  #   A `String` will be treated as the path to the keyfile to be used for the construction of
  #   credentials for this client.
  #   A `Hash` will be treated as the contents of a keyfile to be used for the construction of
  #   credentials for this client.
  #   A `GRPC::Core::Channel` will be used to make calls through.
  #   A `GRPC::Core::ChannelCredentials` for the setting up the RPC client. The channel credentials
  #   should already be composed with a `GRPC::Core::CallCredentials` object.
  #   A `Proc` will be used as an updater_proc for the Grpc channel. The proc transforms the
  #   metadata for requests, generally, 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.
  # @param metadata [Hash]
  #   Default metadata to be sent with each request. This can be overridden on a per call basis.
  # @param exception_transformer [Proc]
  #   An optional proc that intercepts any exceptions raised during an API call to inject
  #   custom error handling.
  def initialize \
      credentials: nil,
      scopes: ALL_SCOPES,
      client_config: {},
      timeout: DEFAULT_TIMEOUT,
      metadata: nil,
      exception_transformer: 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/v1p1beta1/cloud_speech_services_pb"

    credentials ||= Google::Cloud::Speech::V1p1beta1::Credentials.default

    @operations_client = OperationsClient.new(
      credentials: credentials,
      scopes: scopes,
      client_config: client_config,
      timeout: timeout,
      lib_name: lib_name,
      lib_version: lib_version,
    )

    if credentials.is_a?(String) || credentials.is_a?(Hash)
      updater_proc = Google::Cloud::Speech::V1p1beta1::Credentials.new(credentials).updater_proc
    end
    if credentials.is_a?(GRPC::Core::Channel)
      channel = credentials
    end
    if credentials.is_a?(GRPC::Core::ChannelCredentials)
      chan_creds = credentials
    end
    if credentials.is_a?(Proc)
      updater_proc = credentials
    end
    if credentials.is_a?(Google::Auth::Credentials)
      updater_proc = credentials.updater_proc
    end

    package_version = Gem.loaded_specs['google-cloud-speech'].version.version

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

    headers = { :"x-goog-api-client" => google_api_client }
    headers.merge!(metadata) unless metadata.nil?
    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.v1p1beta1.Speech",
        JSON.parse(f.read),
        client_config,
        Google::Gax::Grpc::STATUS_CODE_NAMES,
        timeout,
        errors: Google::Gax::Grpc::API_ERRORS,
        metadata: headers
      )
    end

    # Allow overriding the service path/port in subclasses.
    service_path = self.class::SERVICE_ADDRESS
    port = self.class::DEFAULT_SERVICE_PORT
    interceptors = self.class::GRPC_INTERCEPTORS
    @speech_stub = Google::Gax::Grpc.create_stub(
      service_path,
      port,
      chan_creds: chan_creds,
      channel: channel,
      updater_proc: updater_proc,
      scopes: scopes,
      interceptors: interceptors,
      &Google::Cloud::Speech::V1p1beta1::Speech::Stub.method(:new)
    )

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

  # Service calls

  # Performs synchronous speech recognition: receive results after all audio
  # has been sent and processed.
  #
  # @param config [Google::Cloud::Speech::V1p1beta1::RecognitionConfig | Hash]
  #   *Required* Provides information to the recognizer that specifies how to
  #   process the request.
  #   A hash of the same form as `Google::Cloud::Speech::V1p1beta1::RecognitionConfig`
  #   can also be provided.
  # @param audio [Google::Cloud::Speech::V1p1beta1::RecognitionAudio | Hash]
  #   *Required* The audio data to be recognized.
  #   A hash of the same form as `Google::Cloud::Speech::V1p1beta1::RecognitionAudio`
  #   can also be provided.
  # @param options [Google::Gax::CallOptions]
  #   Overrides the default settings for this call, e.g, timeout,
  #   retries, etc.
  # @yield [result, operation] Access the result along with the RPC operation
  # @yieldparam result [Google::Cloud::Speech::V1p1beta1::RecognizeResponse]
  # @yieldparam operation [GRPC::ActiveCall::Operation]
  # @return [Google::Cloud::Speech::V1p1beta1::RecognizeResponse]
  # @raise [Google::Gax::GaxError] if the RPC is aborted.
  # @example
  #   require "google/cloud/speech"
  #
  #   speech_client = Google::Cloud::Speech.new(version: :v1p1beta1)
  #   encoding = :FLAC
  #   sample_rate_hertz = 44100
  #   language_code = "en-US"
  #   config = {
  #     encoding: encoding,
  #     sample_rate_hertz: sample_rate_hertz,
  #     language_code: language_code
  #   }
  #   uri = "gs://bucket_name/file_name.flac"
  #   audio = { uri: uri }
  #   response = speech_client.recognize(config, audio)

  def recognize \
      config,
      audio,
      options: nil,
      &block
    req = {
      config: config,
      audio: audio
    }.delete_if { |_, v| v.nil? }
    req = Google::Gax::to_proto(req, Google::Cloud::Speech::V1p1beta1::RecognizeRequest)
    @recognize.call(req, options, &block)
  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::V1p1beta1::RecognitionConfig | Hash]
  #   *Required* Provides information to the recognizer that specifies how to
  #   process the request.
  #   A hash of the same form as `Google::Cloud::Speech::V1p1beta1::RecognitionConfig`
  #   can also be provided.
  # @param audio [Google::Cloud::Speech::V1p1beta1::RecognitionAudio | Hash]
  #   *Required* The audio data to be recognized.
  #   A hash of the same form as `Google::Cloud::Speech::V1p1beta1::RecognitionAudio`
  #   can also be provided.
  # @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"
  #
  #   speech_client = Google::Cloud::Speech.new(version: :v1p1beta1)
  #   encoding = :FLAC
  #   sample_rate_hertz = 44100
  #   language_code = "en-US"
  #   config = {
  #     encoding: encoding,
  #     sample_rate_hertz: sample_rate_hertz,
  #     language_code: language_code
  #   }
  #   uri = "gs://bucket_name/file_name.flac"
  #   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 = {
      config: config,
      audio: audio
    }.delete_if { |_, v| v.nil? }
    req = Google::Gax::to_proto(req, Google::Cloud::Speech::V1p1beta1::LongRunningRecognizeRequest)
    operation = Google::Gax::Operation.new(
      @long_running_recognize.call(req, options),
      @operations_client,
      Google::Cloud::Speech::V1p1beta1::LongRunningRecognizeResponse,
      Google::Cloud::Speech::V1p1beta1::LongRunningRecognizeMetadata,
      call_options: options
    )
    operation.on_done { |operation| yield(operation) } if block_given?
    operation
  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"

speech_client = Google::Cloud::Speech.new(version: :v1p1beta1)
encoding = :FLAC
sample_rate_hertz = 44100
language_code = "en-US"
config = {
  encoding: encoding,
  sample_rate_hertz: sample_rate_hertz,
  language_code: language_code
}
uri = "gs://bucket_name/file_name.flac"
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:

  • config (Google::Cloud::Speech::V1p1beta1::RecognitionConfig | Hash) —

    Required Provides information to the recognizer that specifies how to process the request. A hash of the same form as Google::Cloud::Speech::V1p1beta1::RecognitionConfig can also be provided.

  • audio (Google::Cloud::Speech::V1p1beta1::RecognitionAudio | Hash) —

    Required The audio data to be recognized. A hash of the same form as Google::Cloud::Speech::V1p1beta1::RecognitionAudio can also be provided.

  • options (Google::Gax::CallOptions) —

    Overrides the default settings for this call, e.g, timeout, retries, etc.

Returns:

  • (Google::Gax::Operation)

Raises:

  • (Google::Gax::GaxError) —

    if the RPC is aborted.



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# File 'lib/google/cloud/speech/v1p1beta1/speech_client.rb', line 306

def long_running_recognize \
    config,
    audio,
    options: nil
  req = {
    config: config,
    audio: audio
  }.delete_if { |_, v| v.nil? }
  req = Google::Gax::to_proto(req, Google::Cloud::Speech::V1p1beta1::LongRunningRecognizeRequest)
  operation = Google::Gax::Operation.new(
    @long_running_recognize.call(req, options),
    @operations_client,
    Google::Cloud::Speech::V1p1beta1::LongRunningRecognizeResponse,
    Google::Cloud::Speech::V1p1beta1::LongRunningRecognizeMetadata,
    call_options: options
  )
  operation.on_done { |operation| yield(operation) } if block_given?
  operation
end

#recognize(config, audio, options: nil) {|result, operation| ... } ⇒ Google::Cloud::Speech::V1p1beta1::RecognizeResponse

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

Examples:

require "google/cloud/speech"

speech_client = Google::Cloud::Speech.new(version: :v1p1beta1)
encoding = :FLAC
sample_rate_hertz = 44100
language_code = "en-US"
config = {
  encoding: encoding,
  sample_rate_hertz: sample_rate_hertz,
  language_code: language_code
}
uri = "gs://bucket_name/file_name.flac"
audio = { uri: uri }
response = speech_client.recognize(config, audio)

Parameters:

  • config (Google::Cloud::Speech::V1p1beta1::RecognitionConfig | Hash) —

    Required Provides information to the recognizer that specifies how to process the request. A hash of the same form as Google::Cloud::Speech::V1p1beta1::RecognitionConfig can also be provided.

  • audio (Google::Cloud::Speech::V1p1beta1::RecognitionAudio | Hash) —

    Required The audio data to be recognized. A hash of the same form as Google::Cloud::Speech::V1p1beta1::RecognitionAudio can also be provided.

  • options (Google::Gax::CallOptions) —

    Overrides the default settings for this call, e.g, timeout, retries, etc.

Yields:

  • (result, operation) —

    Access the result along with the RPC operation

Yield Parameters:

Returns:

Raises:

  • (Google::Gax::GaxError) —

    if the RPC is aborted.



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# File 'lib/google/cloud/speech/v1p1beta1/speech_client.rb', line 232

def recognize \
    config,
    audio,
    options: nil,
    &block
  req = {
    config: config,
    audio: audio
  }.delete_if { |_, v| v.nil? }
  req = Google::Gax::to_proto(req, Google::Cloud::Speech::V1p1beta1::RecognizeRequest)
  @recognize.call(req, options, &block)
end

#streaming_recognize(streaming_config, options: nil) ⇒ Google::Cloud::Speech::V1p1beta1::Stream

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

Provides information to the recognizer that specifies how to process the request. A hash of the same form as +Google::Cloud::Speech::V1p1beta1::StreamingRecognitionConfig+ can also be provided.

Examples:

require "google/cloud/speech"

speech_client = Google::Cloud::Speech.new version: :v1p1beta1
streaming_config = {
  config: {
    encoding: :linear16,
    language_code: "en-US",
    sample_rate_hertz: 16000
  }
}
stream = speech_client.streaming_recognize(streaming_config)

# Stream 5 seconds of audio from the microphone
# Actual implementation of microphone input varies by platform
5.times do
  stream.send MicrophoneInput.read(32000)
end

stream.stop
stream.wait_until_complete!

results = stream.results
result = results.first.alternatives.first
result.transcript #=> "how old is the Brooklyn Bridge"
result.confidence #=> 0.9826789498329163

Parameters:

Returns:

Raises:

  • (Google::Gax::GaxError) —

    if the RPC is aborted.



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# File 'lib/google/cloud/speech/v1p1beta1/helpers.rb', line 69

def streaming_recognize streaming_config, options: nil
  if streaming_config.is_a?(::Hash) &&
     streaming_config[:config] &&
     streaming_config[:config][:encoding]
    streaming_config[:config][:encoding] =
      streaming_config[:config][:encoding].upcase
  end
  V1p1beta1::Stream.new(
    streaming_config,
    proc do |reqs|
      request_protos = reqs.lazy.map do |req|
        Google::Gax.to_proto(
          req,
          Google::Cloud::Speech::V1p1beta1::StreamingRecognizeRequest
        )
      end
      @streaming_recognize.call(request_protos, options)
    end
  )
end