public async Task <string> RecognizeAudioAsync(string fileURL)
{
string result = string.Empty;
var config = SpeechConfig.FromSubscription(_subscriptionKey, _region);
var stopRecognition = new TaskCompletionSource <int>();
using (var audioInput = await AudioUtils.DownloadWavFileAsync(fileURL))
{
using (var recognizer = new SpeechRecognizer(config, audioInput))
{
// Subscribes to events.
recognizer.Recognized += (s, e) =>
{
if (e.Result.Reason == ResultReason.RecognizedSpeech)
{
result = e.Result.Text;
}
};
recognizer.Canceled += (s, e) =>
{
if (e.Reason == CancellationReason.Error)
{
result = $"NOMATCH: Audio file error ({e.ErrorDetails})";
}
stopRecognition.TrySetResult(0);
};
recognizer.SessionStopped += (s, e) =>
{
stopRecognition.TrySetResult(0);
};
// Starts continuous recognition. Uses StopContinuousRecognitionAsync() to stop recognition.
await recognizer.StartContinuousRecognitionAsync().ConfigureAwait(false);
// Waits for completion.
// Use Task.WaitAny to keep the task rooted.
Task.WaitAny(new[] { stopRecognition.Task });
// Stops recognition.
await recognizer.StopContinuousRecognitionAsync().ConfigureAwait(false);
}
}
return(string.IsNullOrEmpty(result) ? "NOMATCH: Speech could not be recognized." : result);
}
public async Task <TranscriptUtterance> SpeechToTranslatedTextAsync(string audioUrl, string sourceLanguage, string targetLanguage)
{
Transcripts.Clear();
TranscriptUtterance utterance = null;
var config = SpeechTranslationConfig.FromSubscription(_subscriptionKey, _region);
config.SpeechRecognitionLanguage = sourceLanguage;
config.AddTargetLanguage(targetLanguage);
var stopTranslation = new TaskCompletionSource <int>();
using (var audioInput = await AudioUtils.DownloadWavFileAsync(audioUrl))
{
using (var recognizer = new TranslationRecognizer(config, audioInput))
{
// Subscribes to events.
recognizer.Recognized += (s, e) => {
if (e.Result.Reason == ResultReason.TranslatedSpeech)
{
utterance = new TranscriptUtterance
{
Recognition = e.Result.Text,
Translation = e.Result.Translations.FirstOrDefault().Value,
};
}
else if (e.Result.Reason == ResultReason.NoMatch)
{
Trace.TraceError($"NOMATCH: Speech could not be translated.");
}
};
recognizer.Canceled += (s, e) =>
{
if (e.Reason == CancellationReason.Error)
{
Trace.TraceError($"Failed to decode incoming text message: {e.ErrorDetails}");
}
stopTranslation.TrySetResult(0);
};
recognizer.SessionStopped += (s, e) => {
Trace.TraceInformation("Session stopped event.");
stopTranslation.TrySetResult(0);
};
await recognizer.StartContinuousRecognitionAsync().ConfigureAwait(false);
// Waits for completion.
// Use Task.WaitAny to keep the task rooted.
Task.WaitAny(new[] { stopTranslation.Task });
// Stops translation.
await recognizer.StopContinuousRecognitionAsync().ConfigureAwait(false);
return(utterance);
}
}
}
