CODEWITHSUNDEEP
windows-phone-8.1text-to-speechc++-cxspeech-synthesis
Arielle
Arielle

Reputation: 1251

SpeechSynthesizer::SynthesizeTextToStreamAsync function takes forever

I have the following C++/CX code:

Windows::Media::SpeechSynthesis::SpeechSynthesizer^ synth = ref new Windows::Media::SpeechSynthesis::SpeechSynthesizer();
Platform::String^ text = "This is a string of text.";
concurrency::create_task(synth->SynthesizeTextToStreamAsync(text))
  .then([&](Windows::Media::SpeechSynthesis::SpeechSynthesisStream^ stream) {
      mediaElement->AutoPlay = true;
      mediaElement->SetSource(stream, stream->ContentType);
      mediaElement->Play();
  });

If my understanding is correct, it is supposed to synthesize the string This is a string of text. into a stream that would then be played through a MediaElement. After I execute this code, however, the lambda specified in task.then() never runs. Am I missing something?

Upvotes: 1

Views: 323

Answers (1)

Peter Torr
Peter Torr

Reputation: 12019

This works fine for me. A few possibilities:

  1. You don't have the Microphone capability and you are swallowing an Access Denied exception(*)
  2. Calling Play is throwing and you are swallowing the exception(**)
  3. You are running on a device that doesn't have a default speech language installed (DefaultVoice == nullptr)

(*) Although you're not actually using the Microphone for speech synthesis, the way the speech system works in Windows Phone you need this capability

(**) You should never call Play immediately after setting the Source; you must wait for the MediaOpened event to be raised (or, in this case, rely on AutoPlay to do the work for you).

Upvotes: 2

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