Adding basic SSML support to Polly #737
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I recognized that the API basically could support SSML for AWS Polly.
The phrase of course has to encode all the SSML tags, so that a phrase like
<speak><prosody rate="90%">Hello</prosody></speak>
has to be sent as
http://mysonos:5005/Office/say/%3Cspeak%3E%3Cprosody%20rate%3D%2290%25%22%3EHello%3C%2Fprosody%3E%3C%2Fspeak%3E
Nevertheless, the phrase is sent correctly to AWS, the only "showstopper" is that in the AWS API call, the TextType is set to text.
I now added a few simple lines in the aws-polly.js provider, detecting the leading and ending
"<speak>"
tags in an SSML phrase and setting the TextType to "ssml" accordingly.