//private static System.Speech.Recognition.SpeechRecognizedEventArgs WakeUpWordResults;
public static async System.Threading.Tasks.Task <string> MicrophoneToTextAsync()
{
CallServices <ISpeechToTextService, ISpeechToTextServiceResponse> wSTT = new CallServices <ISpeechToTextService, ISpeechToTextServiceResponse>(null);
System.Globalization.CultureInfo ci = new System.Globalization.CultureInfo(Options.options.locale.language);
using (System.Speech.Recognition.SpeechRecognitionEngine RecognitionEngine = new System.Speech.Recognition.SpeechRecognitionEngine(ci))
{
RecognitionEngine.SetInputToDefaultAudioDevice();
RecognitionEngine.LoadGrammar(new System.Speech.Recognition.DictationGrammar());
System.Speech.Recognition.RecognitionResult WakeUpWordResult = RecognitionEngine.Recognize();
if (WakeUpWordResult == null)
{
return(null);
}
using (System.IO.FileStream waveStream = new System.IO.FileStream(Options.options.tempFolderPath + Options.options.audio.speechSynthesisFileName, System.IO.FileMode.Create))
{
WakeUpWordResult.Audio.WriteToWaveStream(waveStream);
waveStream.Flush();
waveStream.Close();
}
byte[] bytes = await Helpers.ReadBytesFromFileAsync(Options.options.audio.speechSynthesisFileName);
System.IO.MemoryStream stream = new System.IO.MemoryStream(bytes);
string text = WakeUpWordResult.Text;
int sampleRate = await Audio.GetSampleRateAsync(Options.options.tempFolderPath + Options.options.audio.speechSynthesisFileName);
System.Collections.Generic.Dictionary <string, string> apiArgs = new System.Collections.Generic.Dictionary <string, string>()
{
{ "sampleRate", sampleRate.ToString() }
};
foreach (ISpeechToTextService STT in new FindServices <ISpeechToTextService>(Options.commandservices["SpeechToText"].preferredServices).PreferredOrderingOfServices)
{
// ISpeechToTextService STT = (ISpeechToTextService)constructor.Invoke(Type.EmptyTypes);;
SpeechToTextServiceResponse r = await STT.SpeechToTextServiceAsync(bytes, apiArgs);
if (r.StatusCode == 200)
{
text = r.ResponseResult;
Console.WriteLine(r.Service.name + ":\"" + text + "\" Total Elapsed ms:" + r.TotalElapsedMilliseconds + " Request Elapsed ms:" + r.RequestElapsedMilliseconds);
return(text);
}
else
{
Console.WriteLine(r.Service.name + " not available.");
}
}
CallServiceResponse <ISpeechToTextServiceResponse> response = await wSTT.CallServiceAsync(bytes, apiArgs);
text = response.ResponseResult;
Console.WriteLine("Windows STT (default):\"" + text + "\" Total Elapsed ms:" + response.TotalElapsedMilliseconds + " Request Elapsed ms:" + response.RequestElapsedMilliseconds);
return(text);
}
}
public static async System.Threading.Tasks.Task <string[]> WaitForWakeUpWordThenRecognizeRemainingSpeechAsync(string[] WakeUpWords)
{
Console.WriteLine("Say the wakeup word (" + string.Join(" ", WakeUpWords) + ") followed by the request ...");
CallServices <ISpeechToTextService, ISpeechToTextServiceResponse> wSTT = new CallServices <ISpeechToTextService, ISpeechToTextServiceResponse>(null);
System.Diagnostics.Stopwatch stopWatch = new System.Diagnostics.Stopwatch();
stopWatch.Start(); // continues until return
System.Globalization.CultureInfo ci = new System.Globalization.CultureInfo(Options.options.locale.language);
while (true)
{
using (System.Speech.Recognition.SpeechRecognitionEngine RecognitionEngine = new System.Speech.Recognition.SpeechRecognitionEngine(ci))
{
RecognitionEngine.SetInputToDefaultAudioDevice();
// build wakeup word grammar
System.Speech.Recognition.GrammarBuilder wakeUpWordBuilder = new System.Speech.Recognition.GrammarBuilder();
wakeUpWordBuilder.Append(new System.Speech.Recognition.Choices(WakeUpWords));
// build words-after-wakeup word grammar
System.Speech.Recognition.GrammarBuilder wordsAfterWakeUpWordBuilder = new System.Speech.Recognition.GrammarBuilder();
wordsAfterWakeUpWordBuilder.AppendWildcard();
System.Speech.Recognition.SemanticResultKey wordsAfterWakeUpWordKey = new System.Speech.Recognition.SemanticResultKey("wordsAfterWakeUpWordKey", wordsAfterWakeUpWordBuilder);
wakeUpWordBuilder.Append(new System.Speech.Recognition.SemanticResultKey("wordsAfterWakeUpWordKey", wordsAfterWakeUpWordBuilder));
// initialize recognizer, wait for result, save result to file
System.Speech.Recognition.Grammar g = new System.Speech.Recognition.Grammar(wakeUpWordBuilder);
RecognitionEngine.LoadGrammar(g);
if (Options.options.wakeup.initialSilenceTimeout == -1)
{
RecognitionEngine.InitialSilenceTimeout = TimeSpan.FromTicks(Int32.MaxValue); // never timeout
}
else
{
RecognitionEngine.InitialSilenceTimeout = TimeSpan.FromSeconds(Options.options.wakeup.initialSilenceTimeout); // timesout after this much silence
}
RecognitionEngine.EndSilenceTimeout = TimeSpan.FromSeconds(Options.options.wakeup.endSilenceTimeout); // maximum silence allowed after hearing wakeup word
#if true // experimenting with Babble and other timeouts
RecognitionEngine.BabbleTimeout = TimeSpan.FromSeconds(0);
#else
RecognitionEngine.BabbleTimeout = TimeSpan.FromTicks(UInt32.MaxValue);
#endif
System.Speech.Recognition.RecognitionResult WakeUpWordResult = RecognitionEngine.Recognize();
// RecognitionResult is null when some unidentified timeout expires around 30 seconds. Can't find a way to make timeouts infinite so just looping.
if (WakeUpWordResult == null)
{
continue;
}
using (System.IO.FileStream waveStream = new System.IO.FileStream(Options.options.tempFolderPath + Options.options.audio.speechSynthesisFileName, System.IO.FileMode.Create))
{
WakeUpWordResult.Audio.WriteToWaveStream(waveStream);
waveStream.Flush();
waveStream.Close();
}
Console.WriteLine("Wake up word detected (" + WakeUpWordResult.Words[0].Text + "): confidence:" + WakeUpWordResult.Confidence + " Elapsed Ms:" + stopWatch.ElapsedMilliseconds);
if (WakeUpWordResult.Confidence >= Options.options.wakeup.confidence)
{
byte[] bytes = await Helpers.ReadBytesFromFileAsync(Options.options.audio.speechSynthesisFileName);
string text = WakeUpWordResult.Text;
int sampleRate = await Audio.GetSampleRateAsync(Options.options.tempFolderPath + Options.options.audio.speechSynthesisFileName);
System.Collections.Generic.Dictionary <string, string> apiArgs = new System.Collections.Generic.Dictionary <string, string>()
{
{ "sampleRate", sampleRate.ToString() }
};
#if false // for testing
await windows.SpeechToTextAsync(bytes, apiArgs);
Console.WriteLine("Windows STT (demo):\"" + windows.ResponseResult + "\" Total Elapsed ms:" + windows.TotalElapsedMilliseconds + " Request Elapsed ms:" + windows.RequestElapsedMilliseconds);
#endif
System.IO.MemoryStream stream = new System.IO.MemoryStream(bytes);
foreach (ISpeechToTextService STT in new FindServices <ISpeechToTextService>(Options.commandservices["SpeechToText"].preferredServices).PreferredOrderingOfServices)
{
// ISpeechToTextService STT = (ISpeechToTextService)constructor.Invoke(Type.EmptyTypes);
SpeechToTextServiceResponse r = await STT.SpeechToTextServiceAsync(bytes, apiArgs);
if (r.StatusCode == 200)
{
text = r.ResponseResult;
Console.WriteLine(r.Service.name + ":\"" + text + "\" Total Elapsed ms:" + r.TotalElapsedMilliseconds + " Request Elapsed ms:" + r.RequestElapsedMilliseconds);
return(text.Split(" ".ToCharArray(), StringSplitOptions.None));
}
else
{
Console.WriteLine(r.Service.name + " not available.");
}
}
CallServiceResponse <ISpeechToTextServiceResponse> response = await wSTT.CallServiceAsync(bytes, apiArgs);
text = response.ResponseResult;
Console.WriteLine("Windows STT (default):\"" + text + "\" Total Elapsed ms:" + response.TotalElapsedMilliseconds + " Request Elapsed ms:" + response.RequestElapsedMilliseconds);
return(text.Split(" ".ToCharArray(), StringSplitOptions.None));
}
}
}
}
