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

Inherits:
Object
  • Object
show all
Defined in:
lib/google/cloud/speech/v1/speech_client.rb,
lib/google/cloud/speech/v1/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 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/v1/speech_client.rb', line 96

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/v1/cloud_speech_services_pb"

  credentials ||= Google::Cloud::Speech::V1::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::V1::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.v1.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::V1::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 Method Details

#get_operation(name, options: nil) ⇒ Google::Gax::Operation

Gets the latest state of a long-running operation. Clients can use this method to poll the operation result at intervals as recommended by the API service.

Examples:

require "google/cloud/speech"

speech_client = Google::Cloud::Speech.new version: :v1

op = speech_client.get_operation "-"

# Process error operations.
log_error op.error if op.error?

if op.done?
  # Process completed operations.
  log_finished op.response, op.metadata
else
  # Process pending operations.
  log_pending op.name, op.metadata
end

Parameters:

  • name (String) —

    The name of the operation resource.

  • 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/v1/helpers.rb', line 120

def get_operation name, options: nil
  proto_op = @operations_client.get_operation name, options: options

  Google::Gax::Operation.new(
    proto_op,
    @operations_client,
    Google::Cloud::Speech::V1::LongRunningRecognizeResponse,
    Google::Cloud::Speech::V1::LongRunningRecognizeMetadata,
    call_options: options
  )
end

#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: :v1)
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::V1::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::V1::RecognitionConfig can also be provided.

  • audio (Google::Cloud::Speech::V1::RecognitionAudio | Hash) —

    Required The audio data to be recognized. A hash of the same form as Google::Cloud::Speech::V1::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/v1/speech_client.rb', line 307

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::V1::LongRunningRecognizeRequest)
  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) {|result, operation| ... } ⇒ Google::Cloud::Speech::V1::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: :v1)
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::V1::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::V1::RecognitionConfig can also be provided.

  • audio (Google::Cloud::Speech::V1::RecognitionAudio | Hash) —

    Required The audio data to be recognized. A hash of the same form as Google::Cloud::Speech::V1::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/v1/speech_client.rb', line 233

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::V1::RecognizeRequest)
  @recognize.call(req, options, &block)
end

#streaming_recognize(streaming_config, options: nil) ⇒ Google::Cloud::Speech::V1::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::V1::StreamingRecognitionConfig+ can also be provided.

Examples:

require "google/cloud/speech"

speech_client = Google::Cloud::Speech.new
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/v1/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
  V1::Stream.new(
    streaming_config,
    proc do |reqs|
      request_protos = reqs.lazy.map do |req|
        Google::Gax.to_proto(
          req,
          Google::Cloud::Speech::V1::StreamingRecognizeRequest
        )
      end
      @streaming_recognize.call(request_protos, options)
    end
  )
end