def start_stream_transcription(params = {}, options = {}, &block)
      params = params.dup
      input_event_stream_handler = _event_stream_handler(
        :input,
        params.delete(:input_event_stream_handler),
        EventStreams::AudioStream
      )
      output_event_stream_handler = _event_stream_handler(
        :output,
        params.delete(:output_event_stream_handler) || params.delete(:event_stream_handler),
        EventStreams::TranscriptResultStream
      )

      yield(output_event_stream_handler) if block_given?

      req = build_request(:start_stream_transcription, params)

      req.context[:input_event_stream_handler] = input_event_stream_handler
      req.handlers.add(Aws::Binary::EncodeHandler, priority: 95)
      req.context[:output_event_stream_handler] = output_event_stream_handler
      req.handlers.add(Aws::Binary::DecodeHandler, priority: 95)

      req.send_request(options, &block)
    end
def start_stream_transcription(params = {}, options = {}, &block)
      params = params.dup
      input_event_stream_handler = _event_stream_handler(
        :input,
        params.delete(:input_event_stream_handler),
        EventStreams::AudioStream
      )
      output_event_stream_handler = _event_stream_handler(
        :output,
        params.delete(:output_event_stream_handler) || params.delete(:event_stream_handler),
        EventStreams::TranscriptResultStream
      )

      yield(output_event_stream_handler) if block_given?

      req = build_request(:start_stream_transcription, params)

      req.context[:input_event_stream_handler] = input_event_stream_handler
      req.handlers.add(Aws::Binary::EncodeHandler, priority: 95)
      req.context[:output_event_stream_handler] = output_event_stream_handler
      req.handlers.add(Aws::Binary::DecodeHandler, priority: 95)

      req.send_request(options, &block)
    end
@option options [required, Aws::CredentialProvider] :credentials
     Your AWS credentials. This can be an instance of any one of the
     following classes:

     * `Aws::Credentials` - Used for configuring static, non-refreshing
       credentials.

     * `Aws::InstanceProfileCredentials` - Used for loading credentials
       from an EC2 IMDS on an EC2 instance.

     * `Aws::SharedCredentials` - Used for loading credentials from a
       shared file, such as `~/.aws/config`.

     * `Aws::AssumeRoleCredentials` - Used when you need to assume a role.

     When `:credentials` are not configured directly, the following
     locations will be searched for credentials:

     * `Aws.config[:credentials]`
     * The `:access_key_id`, `:secret_access_key`, and `:session_token` options.
     * ENV['AWS_ACCESS_KEY_ID'], ENV['AWS_SECRET_ACCESS_KEY']
     * `~/.aws/credentials`
     * `~/.aws/config`
     * EC2 IMDS instance profile - When used by default, the timeouts are
       very aggressive. Construct and pass an instance of
       `Aws::InstanceProfileCredentails` to enable retries and extended
       timeouts.

   @option options [required, String] :region
     The AWS region to connect to.  The configured `:region` is
     used to determine the service `:endpoint`. When not passed,
     a default `:region` is search for in the following locations:

     * `Aws.config[:region]`
     * `ENV['AWS_REGION']`
     * `ENV['AMAZON_REGION']`
     * `ENV['AWS_DEFAULT_REGION']`
     * `~/.aws/credentials`
     * `~/.aws/config`

   @option options [String] :access_key_id

   @option options [Boolean] :convert_params (true)
     When `true`, an attempt is made to coerce request parameters into
     the required types.

   @option options [String] :endpoint
     The client endpoint is normally constructed from the `:region`
     option. You should only configure an `:endpoint` when connecting
     to test endpoints. This should be avalid HTTP(S) URI.

   @option options [Proc] :event_stream_handler
     When an EventStream or Proc object is provided, it will be used as callback for each chunk of event stream response received along the way.

   @option options [Proc] :input_event_stream_handler
     When an EventStream or Proc object is provided, it can be used for sending events for the event stream.

   @option options [Aws::Log::Formatter] :log_formatter (Aws::Log::Formatter.default)
     The log formatter.

   @option options [Symbol] :log_level (:info)
     The log level to send messages to the `:logger` at.

   @option options [Logger] :logger
     The Logger instance to send log messages to.  If this option
     is not set, logging will be disabled.

   @option options [Proc] :output_event_stream_handler
     When an EventStream or Proc object is provided, it will be used as callback for each chunk of event stream response received along the way.

   @option options [String] :profile ("default")
     Used when loading credentials from the shared credentials file
     at HOME/.aws/credentials.  When not specified, 'default' is used.

   @option options [Float] :retry_base_delay (0.3)
     The base delay in seconds used by the default backoff function.

   @option options [Symbol] :retry_jitter (:none)
     A delay randomiser function used by the default backoff function. Some predefined functions can be referenced by name - :none, :equal, :full, otherwise a Proc that takes and returns a number.

     @see https://www.awsarchitectureblog.com/2015/03/backoff.html

   @option options [Integer] :retry_limit (3)
     The maximum number of times to retry failed requests.  Only
     ~ 500 level server errors and certain ~ 400 level client errors
     are retried.  Generally, these are throttling errors, data
     checksum errors, networking errors, timeout errors and auth
     errors from expired credentials.

   @option options [Integer] :retry_max_delay (0)
     The maximum number of seconds to delay between retries (0 for no limit) used by the default backoff function.

   @option options [String] :secret_access_key

   @option options [String] :session_token

   @option options [Boolean] :stub_responses (false)
     Causes the client to return stubbed responses. By default
     fake responses are generated and returned. You can specify
     the response data to return or errors to raise by calling
     {ClientStubs#stub_responses}. See {ClientStubs} for more information.

     ** Please note ** When response stubbing is enabled, no HTTP
     requests are made, and retries are disabled.

   @option options [Boolean] :validate_params (true)
     When `true`, request parameters are validated before
     sending the request.

 @!group API Operations
 Starts a bidirectional HTTP2 stream where audio is streamed to Amazon
 Transcribe and the transcription results are streamed to your
 application.

 The following are encoded as HTTP2 headers:

 * x-amzn-transcribe-language-code

 * x-amzn-transcribe-media-encoding

 * x-amzn-transcribe-sample-rate

 * x-amzn-transcribe-session-id

 @option params [required, String] :language_code
   Indicates the language used in the input audio stream.

 @option params [required, Integer] :media_sample_rate_hertz
   The sample rate, in Hertz, of the input audio. We suggest that you use
   8000 Hz for low quality audio and 16000 Hz for high quality audio.

 @option params [required, String] :media_encoding
   The encoding used for the input audio.

 @option params [String] :vocabulary_name
   The name of the vocabulary to use when processing the transcription
   job.

 @option params [String] :session_id
   A identifier for the transcription session. Use this parameter when
   you want to retry a session. If you don't provide a session ID,
   Amazon Transcribe will generate one for you and return it in the
   response.

 @return [Types::StartStreamTranscriptionResponse] Returns a {Seahorse::Client::Response response} object which responds to the following methods:

   * {Types::StartStreamTranscriptionResponse#request_id #request_id} => String
   * {Types::StartStreamTranscriptionResponse#language_code #language_code} => String
   * {Types::StartStreamTranscriptionResponse#media_sample_rate_hertz #media_sample_rate_hertz} => Integer
   * {Types::StartStreamTranscriptionResponse#media_encoding #media_encoding} => String
   * {Types::StartStreamTranscriptionResponse#vocabulary_name #vocabulary_name} => String
   * {Types::StartStreamTranscriptionResponse#session_id #session_id} => String
   * {Types::StartStreamTranscriptionResponse#transcript_result_stream #transcript_result_stream} => Types::TranscriptResultStream

 @example Bi-directional EventStream Operation Example

   You can signal input events after initial request is
   established, events will be sent to stream
   immediately (once stream connection is established successfully).

   To signal events, you can call #signal methods from an Aws::TranscribeStreamingService::EventStreams::AudioStream object.
   Make sure signal events before calling #wait or #join! at async response.

     input_stream = Aws::TranscribeStreamingService::EventStreams::AudioStream.new

     async_resp = client.start_stream_transcription( # params input,
       input_event_stream_handler: input_stream) do |out_stream|

       # register callbacks for events arrival
       out_stream.on_transcript_event_event do |event|
         event # => Aws::TranscribeStreamingService::Types::TranscriptEvent
       end
       out_stream.on_bad_request_exception_event do |event|
         event # => Aws::TranscribeStreamingService::Types::BadRequestException
       end
       out_stream.on_limit_exceeded_exception_event do |event|
         event # => Aws::TranscribeStreamingService::Types::LimitExceededException
       end
       out_stream.on_internal_failure_exception_event do |event|
         event # => Aws::TranscribeStreamingService::Types::InternalFailureException
       end
       out_stream.on_conflict_exception_event do |event|
         event # => Aws::TranscribeStreamingService::Types::ConflictException
       end

     end
     # => returns Aws::Seahorse::Client::AsyncResponse

     # signal events
     input_stream.signal_audio_event_event( ... )

     # make sure signaling :end_stream in the end
     input_stream.signal_end_stream

     # wait until stream is closed before finalizing sync response
     resp = async_resp.wait
     # Or close stream and finalizing sync response immediately
     # resp = async_resp.join!

   Inorder to streamingly processing events received, you can also provide an Aws::TranscribeStreamingService::EventStreams::TranscriptResultStream
   object to register callbacks before initializing request instead of processing from request block

     output_stream = Aws::TranscribeStreamingService::EventStreams::TranscriptResultStream.new
     # register callbacks for events arrival
     output_stream.on_transcript_event_event do |event|
       event # => Aws::TranscribeStreamingService::Types::TranscriptEvent
     end
     output_stream.on_bad_request_exception_event do |event|
       event # => Aws::TranscribeStreamingService::Types::BadRequestException
     end
     output_stream.on_limit_exceeded_exception_event do |event|
       event # => Aws::TranscribeStreamingService::Types::LimitExceededException
     end
     output_stream.on_internal_failure_exception_event do |event|
       event # => Aws::TranscribeStreamingService::Types::InternalFailureException
     end
     output_stream.on_conflict_exception_event do |event|
       event # => Aws::TranscribeStreamingService::Types::ConflictException
     end
     output_stream.on_error_event do |event|
       # catch unmodeled error event in the stream
       raise event
       # => Aws::Errors::EventError
       # event.event_type => :error
       # event.error_code => String
       # event.error_message => String
     end

     async_resp = client.start_stream_transcription ( #params input,
       input_event_stream_handler: input_stream
       output_event_stream_handler: output_stream
     )

     resp = async_resp.wait!

   Besides above usage patterns for process events when they arrive immediately, you can also
   iterate through events after response complete.

   Events are available at resp.transcript_result_stream # => Enumerator

 @example Request syntax with placeholder values

   async_resp = async_client.start_stream_transcription({
     language_code: "en-US", # required, accepts en-US, en-GB, es-US, fr-CA, fr-FR
     media_sample_rate_hertz: 1, # required
     media_encoding: "pcm", # required, accepts pcm
     vocabulary_name: "VocabularyName",
     session_id: "SessionId",
     input_event_stream_hander: EventStreams::AudioStream.new,
   })
   # => Seahorse::Client::AsyncResponse
   async_resp.wait
   # => Seahorse::Client::Response
   # Or use async_resp.join!

 @example Response structure

   resp.request_id #=> String
   resp.language_code #=> String, one of "en-US", "en-GB", "es-US", "fr-CA", "fr-FR"
   resp.media_sample_rate_hertz #=> Integer
   resp.media_encoding #=> String, one of "pcm"
   resp.vocabulary_name #=> String
   resp.session_id #=> String
   All events are available at resp.transcript_result_stream:
   resp.transcript_result_stream #=> Enumerator
   resp.transcript_result_stream.event_types #=> [:transcript_event, :bad_request_exception, :limit_exceeded_exception, :internal_failure_exception, :conflict_exception]

   For :transcript_event event available at #on_transcript_event_event callback and response eventstream enumerator:
   event.transcript.results #=> Array
   event.transcript.results[0].result_id #=> String
   event.transcript.results[0].start_time #=> Float
   event.transcript.results[0].end_time #=> Float
   event.transcript.results[0].is_partial #=> Boolean
   event.transcript.results[0].alternatives #=> Array
   event.transcript.results[0].alternatives[0].transcript #=> String
   event.transcript.results[0].alternatives[0].items #=> Array
   event.transcript.results[0].alternatives[0].items[0].start_time #=> Float
   event.transcript.results[0].alternatives[0].items[0].end_time #=> Float
   event.transcript.results[0].alternatives[0].items[0].type #=> String, one of "PRONUNCIATION", "PUNCTUATION"
   event.transcript.results[0].alternatives[0].items[0].content #=> String

   For :bad_request_exception event available at #on_bad_request_exception_event callback and response eventstream enumerator:
   event.message #=> String

   For :limit_exceeded_exception event available at #on_limit_exceeded_exception_event callback and response eventstream enumerator:
   event.message #=> String

   For :internal_failure_exception event available at #on_internal_failure_exception_event callback and response eventstream enumerator:
   event.message #=> String

   For :conflict_exception event available at #on_conflict_exception_event callback and response eventstream enumerator:
   event.message #=> String

 @see http://docs.aws.amazon.com/goto/WebAPI/transcribe-streaming-2017-10-26/StartStreamTranscription AWS API Documentation

 @overload start_stream_transcription(params = {})
 @param [Hash] params ({})