CODEWITHSUNDEEP
uwptext-to-speechc++-cxspeech-synthesis
georges619
georges619

Reputation: 286

Speak sentence without time limit

I'm currently developing an UWP DLL application using the namespace Windows::Media::SpeechSynthesis. I created a function which allows me to speak an entered text which looks as follow:

int TextToSpeechUwpDll::ttsSpeak( const char* text )
{
   SpeechSynthesizer ^speak = ref new SpeechSynthesizer();
   MediaPlayer ^player = ref new MediaPlayer;

   int wchars_num = MultiByteToWideChar( CP_ACP, 0, text, -1, NULL, 0 );
   wchar_t* texts = new wchar_t[wchars_num];
   MultiByteToWideChar( CP_ACP, 0, text, -1, texts, wchars_num );
   String ^sentence = ref new String( texts );

   task<SpeechSynthesisStream ^> speakTask = create_task( speak->SynthesizeTextToStreamAsync( sentence ) );
   speakTask.then( [player, sentence]( SpeechSynthesisStream ^speechStream )
   {
      player->Source = MediaSource::CreateFromStream( speechStream, speechStream->ContentType );
      player->AutoPlay = true;
      player->Play();
      Sleep( 3000 );
   } );

   return true;
}

However, the Sleep( 3000 );needs to be removed because when I enter a sentence, it is only spoken for 3 seconds meaning that if it is longer than that, the rest won't be spoken. I tried to remove this line, but when I do it, nothing is spoken at all. No sound comes out. The extension of the duration doesn't either solve my problem. What I'm looking for is the ability to speak a sentence without a time limit. Does someone had this issue before?

Upvotes: 0

Views: 115

Answers (1)

Faywang - MSFT
Faywang - MSFT

Reputation: 5868

You should declare a private property about your MediaPlayer ^player to hold it in case local variable "player" is released.

in .h

class TextToSpeechUwpDll
{​
//......

private:​
 MediaPlayer ^player = ref new MediaPlayer();​
};

in .cpp

SpeechSynthesizer ^speak = ref new SpeechSynthesizer(); 

char* text = "helloworld";​
int wchars_num = MultiByteToWideChar(CP_ACP, 0, text, -1, NULL, 0);​
wchar_t* texts = new wchar_t[wchars_num];​
MultiByteToWideChar(CP_ACP, 0, text, -1, texts, wchars_num);​
String ^sentence = ref new String(texts);​
​
task<SpeechSynthesisStream ^> speakTask = create_task(speak->SynthesizeTextToStreamAsync(sentence));​
speakTask.then([this, sentence](SpeechSynthesisStream ^speechStream)​
 {​
  player->Source = MediaSource::CreateFromStream(speechStream, speechStream->ContentType);​
  player->AutoPlay = true;​
  player->Play();​
 });

Upvotes: 0

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