SpeechRecognitionEngine.SetInputToAudioStream Método

public:
 void SetInputToAudioStream(System::IO::Stream ^ audioSource, System::Speech::AudioFormat::SpeechAudioFormatInfo ^ audioFormat);

public void SetInputToAudioStream(System.IO.Stream audioSource, System.Speech.AudioFormat.SpeechAudioFormatInfo audioFormat);

member this.SetInputToAudioStream : System.IO.Stream * System.Speech.AudioFormat.SpeechAudioFormatInfo -> unit

Public Sub SetInputToAudioStream (audioSource As Stream, audioFormat As SpeechAudioFormatInfo)

Parâmetros

Exemplos

O exemplo seguinte mostra parte de uma aplicação de consola que demonstra reconhecimento básico de voz. O exemplo utiliza entrada de um ficheiro de áudio, example.wav, que contém as frases "testing testing one two three" e "mister cooper", separadas por uma pausa. O exemplo gera a seguinte saída.

Starting asynchronous recognition...
  Recognized text =  Testing testing 123
  Recognized text =  Mr. Cooper
  End of stream encountered.
Done.

Press any key to exit...

using System;
using System.Globalization;
using System.IO;
using System.Speech.AudioFormat;
using System.Speech.Recognition;
using System.Threading;

namespace InputExamples
{
  class Program
  {
    // Indicate whether asynchronous recognition is complete.
    static bool completed;

    static void Main(string[] args)
    {
      using (SpeechRecognitionEngine recognizer =
        new SpeechRecognitionEngine(new CultureInfo("en-US")))
      {

        // Create and load a grammar.
        Grammar dictation = new DictationGrammar();
        dictation.Name = "Dictation Grammar";

        recognizer.LoadGrammar(dictation);

        // Configure the input to the recognizer.
        recognizer.SetInputToAudioStream(
          File.OpenRead(@"c:\temp\audioinput\example.wav"),
          new SpeechAudioFormatInfo(
            44100, AudioBitsPerSample.Sixteen, AudioChannel.Mono));

        // Attach event handlers.
        recognizer.SpeechRecognized +=
          new EventHandler<SpeechRecognizedEventArgs>(
            SpeechRecognizedHandler);
        recognizer.RecognizeCompleted +=
          new EventHandler<RecognizeCompletedEventArgs>(
            RecognizeCompletedHandler);

        // Perform recognition of the whole file.
        Console.WriteLine("Starting asynchronous recognition...");
        completed = false;
        recognizer.RecognizeAsync(RecognizeMode.Multiple);

        while (!completed)
        {
          Thread.Sleep(333);
        }
        Console.WriteLine("Done.");
      }

      Console.WriteLine();
      Console.WriteLine("Press any key to exit...");
      Console.ReadKey();
    }

    // Handle the SpeechRecognized event.
    static void SpeechRecognizedHandler(
      object sender, SpeechRecognizedEventArgs e)
    {
      if (e.Result != null && e.Result.Text != null)
      {
        Console.WriteLine("  Recognized text =  {0}", e.Result.Text);
      }
      else
      {
        Console.WriteLine("  Recognized text not available.");
      }
    }

    // Handle the RecognizeCompleted event.
    static void RecognizeCompletedHandler(
      object sender, RecognizeCompletedEventArgs e)
    {
      if (e.Error != null)
      {
        Console.WriteLine("  Error encountered, {0}: {1}",
          e.Error.GetType().Name, e.Error.Message);
      }
      if (e.Cancelled)
      {
        Console.WriteLine("  Operation cancelled.");
      }
      if (e.InputStreamEnded)
      {
        Console.WriteLine("  End of stream encountered.");
      }

      completed = true;
    }
  }
}

Observações

Se o reconhecedor atingir o fim do fluxo de entrada durante uma operação de reconhecimento, a operação de reconhecimento finaliza com a entrada disponível. Quaisquer operações de reconhecimento subsequentes podem gerar uma exceção, a menos que atualize a entrada para o reconhecedor.

Ver também

• SetInputToDefaultAudioDevice()
• SetInputToNull()
• SetInputToWaveFile(String)
• SetInputToWaveStream(Stream)
• RecognizeCompleted