static void InsertMarker(StringBuilder ssmlBuilder, int utf32)
{
var description = EmojiDescriptions.Get(utf32);
if (description != null)
{
InsertSound(ssmlBuilder, description);
}
}
/// <summary>
/// Speak given text.
/// </summary>
/// <param name="text">The text.</param>
public async Task <SpeechSynthesisStream> SayText(string text)
{
var ssmlBuilder = new StringBuilder("<speak version='1.0' xmlns='http://www.w3.org/2001/10/synthesis' xml:lang='en-US'>");
var start = 0;
var index = 0;
while (index < text.Length)
{
var utf32 = char.ConvertToUtf32(text, index);
var description = EmojiDescriptions.Get(utf32);
var foundEmoji = description != null;
if (foundEmoji)
{
InsertSpeach(ssmlBuilder, text, start, index);
index = NextPosition(text, index);
start = index;
InsertSound(ssmlBuilder, description);
}
else
{
index = NextPosition(text, index);
}
}
InsertSpeach(ssmlBuilder, text, start, text.Length);
InsertMarker(ssmlBuilder, EmojiDescriptions.Idle);
ssmlBuilder.Append("</speak>");
var ssml = ssmlBuilder.ToString();
var stream = await _synthesizer.SynthesizeSsmlToStreamAsync(ssml);
return(stream);
}
