BargeInTypes Enumeration

Article
08/18/2014

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Defines the values that set the BargeInType property.

Namespace: Microsoft.SpeechServer.Synthesis
Assembly: Microsoft.SpeechServer (in microsoft.speechserver.dll)

Syntax

'Declaration
<FlagsAttribute> _
Public Enumeration BargeInTypes

[FlagsAttribute] 
public enum BargeInTypes

Members

Member name	Description
Dtmf	Playing of the prompt is stopped when DTMF input is detected.
None	Bargein is disabled.
Speech	Playing of the prompt is stopped when speech input is detected.

Example

The following code example consists of a custom activity that prompts while listening for user speech that might stop the prompt. If the BargeInType property indicates speech bargein, the example extracts the time offset at which the bargein occurred.

using System;
using System.Collections.Generic;
using System.Text;
using System.Workflow.Activities;
using System.Workflow.ComponentModel;
using Microsoft.SpeechServer.Dialog;
using Microsoft.SpeechServer.Recognition;
using Microsoft.SpeechServer.Synthesis;

namespace BargeIn
{
    /// <summary>
    /// Activity deriving from SpeechCompositeActivity.
    /// </summary>
    public class CoreBargeIn : SpeechCompositeActivity
    {
        /// <summary>
        /// Prompt played by the activity.
        /// </summary>
        public const string pt = "Please say a number between one and nine, while I drone on. ";

        /// <summary>
        /// Creates a new instance.
        /// </summary>
        public CoreBargeIn()
        {
        }

        /// <summary>
        /// Executes the activity.
        /// </summary>
        /// <param name="executionContext">The execution context</param>
        protected override void ExecuteCore(ActivityExecutionContext executionContext)
        {
            Uri gu = new System.Uri(Workflow.ApplicationHost.LocalPath, "Grammars/Library.grxml");
            Grammar g = new Microsoft.SpeechServer.Recognition.Grammar(gu, "Cardinal_1_to_9");
            Workflow.SpeechRecognizer.LoadGrammarAsync(g);
 
            Workflow.Synthesizer.BargeInType = BargeInTypes.Speech;

            // Specify the SpeakCompleted event-handler and start the prompt
            Workflow.Synthesizer.SpeakCompleted += Synthesizer_SpeakCompleted;
            Workflow.Synthesizer.SpeakAsync(pt, SynthesisTextFormat.PlainText);

            // Specify the RecognizeCompleted event-handler and start listening
            Workflow.SpeechRecognizer.RecognizeCompleted += SpeechRecognizer_RecognizeCompleted;
            Workflow.SpeechRecognizer.RecognizeAsync();
        }

        private void Synthesizer_SpeakCompleted(object sender, SpeakCompletedEventArgs e)
        {
            // Remove event-handler from SpeakCompleted
            Workflow.Synthesizer.SpeakCompleted -= Synthesizer_SpeakCompleted;

            if (e.BargeInType == BargeInTypes.Speech)
            {
                System.TimeSpan bargie = e.BargeInOffset;
            }
        }

        private void SpeechRecognizer_RecognizeCompleted(object sender, RecognizeCompletedEventArgs e)
        {
            // Remove event-handler from RecognizeCompleted
            Workflow.SpeechRecognizer.RecognizeCompleted -= SpeechRecognizer_RecognizeCompleted;

            // End the custom activity
            OnSpeechActivityClosed(e.Error);
        }
    }
}

Platforms

Development Platforms

Windows XP Professional with Service Pack 2 (SP2), Windows Server 2003, Windows Vista Ultimate Edition, Windows Vista Business Edition, Windows Vista Enterprise Edition

Target Platforms

Windows Server 2003

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