public static string WrapAmazonPitchParam(this TTSPitch pitch, string text)
{
int pitchShift;
switch (pitch)
{
case TTSPitch.X_Low:
case TTSPitch.Low:
case TTSPitch.High:
case TTSPitch.X_High:
//proceed
break;
case TTSPitch.Medium:
return(text);
case TTSPitch.Unassigned:
goto case TTSPitch.Medium;
default:
BGC.Debug.LogError($"TTS Pitch not supported {pitch}");
goto case TTSPitch.Unassigned;
}
//pitchShift = (int)Math.Round(100 * Math.Pow(2, pitch.GetSemitoneShift() / 12.0)) - 100;
pitchShift = (int)Math.Round(100 * (pitch.GetSemitoneShift() / 12.0));
return($"<prosody pitch=\"{pitchShift:+0;-#}%\">{text}</prosody>");
}
protected async Task <string> GetGoogleSynthSpeech(string text, TTSVoice voicePreference, TTSPitch pitchPreference, string filename = null)
{
VoiceSelectionParams voice = voicePreference.GetGoogleVoiceSelectionParams();
AudioConfig config = new AudioConfig
{
AudioEncoding = AudioEncoding.Mp3,
Pitch = pitchPreference.GetSemitoneShift()
};
//TTS
SynthesisInput input = new SynthesisInput
{
Ssml = PrepareGoogleSSML(text)
};
// Perform the Text-to-Speech request, passing the text input
// with the selected voice parameters and audio file type
GoogleSynthesizeSpeechResponse response = await googleClient.SynthesizeSpeechAsync(input, voice, config);
// Write the binary AudioContent of the response to file.
string filepath;
if (string.IsNullOrWhiteSpace(filename))
{
filepath = Path.Combine(TTSFilesPath, $"{Guid.NewGuid()}.mp3");
}
else
{
filepath = Path.Combine(TTSFilesPath, $"{filename}.mp3");
}
using (Stream file = new FileStream(filepath, FileMode.Create))
{
response.AudioContent.WriteTo(file);
}
return(filepath);
}
