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| * text=auto | ||
| *.sh text eol=lf |
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| // Copyright (c) Microsoft Corporation. All rights reserved. | ||
| // Licensed under the MIT license. | ||
|
|
||
| namespace Microsoft.Psi.Samples.LinuxSpeechSample | ||
| { | ||
| using System; | ||
| using Microsoft.CognitiveServices.Speech; | ||
| using Microsoft.CognitiveServices.Speech.Audio; | ||
| using Microsoft.Psi; | ||
| using Microsoft.Psi.Audio; | ||
| using Microsoft.Psi.Components; | ||
|
|
||
| /// <summary> | ||
| /// Component that wraps the Azure Cognitive Services speech recognizer. | ||
| /// </summary> | ||
| public class ContinuousSpeechRecognizer : ConsumerProducer<AudioBuffer, string>, ISourceComponent, IDisposable | ||
| { | ||
| private readonly PushAudioInputStream pushStream; | ||
| private readonly AudioConfig audioInput; | ||
| private readonly SpeechRecognizer recognizer; | ||
|
|
||
| /// <summary> | ||
| /// Initializes a new instance of the <see cref="ContinuousSpeechRecognizer"/> class. | ||
| /// </summary> | ||
| /// <param name="pipeline">The pipeline in which to create the component.</param> | ||
| /// <param name="subscriptionKey">The subscription key for the Azure speech resource.</param> | ||
| /// <param name="region">The service region of the Azure speech resource.</param> | ||
| public ContinuousSpeechRecognizer(Pipeline pipeline, string subscriptionKey, string region) | ||
| : base(pipeline) | ||
| { | ||
| var config = SpeechConfig.FromSubscription(subscriptionKey, region); | ||
| this.pushStream = AudioInputStream.CreatePushStream(); | ||
| this.audioInput = AudioConfig.FromStreamInput(this.pushStream); | ||
| this.recognizer = new SpeechRecognizer(config, this.audioInput); | ||
| } | ||
|
|
||
| /// <inheritdoc/> | ||
| public void Start(Action<DateTime> notifyCompletionTime) | ||
| { | ||
| this.recognizer.Recognized += this.Recognizer_Recognized; | ||
| this.recognizer.StartContinuousRecognitionAsync().Wait(); | ||
| notifyCompletionTime(DateTime.MaxValue); | ||
| } | ||
|
|
||
| /// <inheritdoc/> | ||
| public void Stop(DateTime finalOriginatingTime, Action notifyCompleted) | ||
| { | ||
| this.recognizer.Recognized -= this.Recognizer_Recognized; | ||
| this.pushStream.Close(); | ||
| this.recognizer.StopContinuousRecognitionAsync().Wait(); | ||
| notifyCompleted(); | ||
| } | ||
|
|
||
| /// <inheritdoc/> | ||
| public void Dispose() | ||
| { | ||
| this.recognizer.Dispose(); | ||
| this.audioInput.Dispose(); | ||
| this.pushStream.Dispose(); | ||
| } | ||
|
|
||
| /// <inheritdoc/> | ||
| protected override void Receive(AudioBuffer data, Envelope envelope) | ||
| { | ||
| this.pushStream.Write(data.Data); | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Handler for the speech recognized event from the recognizer. Posts the recognized text to the output. | ||
| /// </summary> | ||
| private void Recognizer_Recognized(object sender, SpeechRecognitionEventArgs e) | ||
| { | ||
| var originatingTime = this.Out.Pipeline.StartTime.AddTicks((long)e.Offset) + e.Result.Duration; | ||
| this.Out.Post(e.Result.Text, originatingTime); | ||
| } | ||
| } | ||
| } |
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