EDDI Amazon Polly Integration

AmazonPollySynthesizer.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
// Nuget - AWSSDK.Polly
using Amazon.Polly; 
using Amazon.Polly.Model;
// Nuget - NAudio.Core
using NAudio.Wave;

namespace EddiSpeechService.SpeechSynthesizers
{
/*
To enable this you need to adjust SpeechService.cs to create and use this instance instead of the built in Windows TTS
*/
    class AmazonPollySynthesizer : IDisposable
    {
        /** Generate these within the Amazon AWS console */
        string awsAccessKey = "XXXXXXXXXXXXX";
        string awsAccessSecret = "YYYYYYYYYYYYYYY";
        
        // Region endpoint, should choose closest to use
        string regionEndpoint = "ap-southeast-2";

        // The voice must be one used by the engine, not all voices are suitable for each engine
        VoiceId voiceID = VoiceId.Amy;
        // Standard or neural
        Engine engine = Engine.Neural;


        AmazonPollyClient client;

        public AmazonPollySynthesizer()
        {
            var config = new AmazonPollyConfig();
            config.RegionEndpoint = Amazon.RegionEndpoint.GetBySystemName(regionEndpoint);
            
            client = new AmazonPollyClient(this.awsAccessKey, this.awsAccessSecret, config);
        }

        internal Stream Speak(VoiceDetails voiceDetails, string speech, SpeechServiceConfiguration Configuration)
        {
            var synthesizeSpeechRequest = new SynthesizeSpeechRequest()
            {
                Engine = engine,
                OutputFormat = OutputFormat.Pcm,
                VoiceId = voiceID,
                TextType = TextType.Ssml,
                Text = "<speak>" + speech + "</speak>",
            };

            using (SynthesizeSpeechResponse synthesizeSpeechResponse = client.SynthesizeSpeech(synthesizeSpeechRequest))
            {
                using (RawSourceWaveStream w = new RawSourceWaveStream(synthesizeSpeechResponse.AudioStream, new WaveFormat(16000, 1)))
                {
                    
                    MemoryStream ms = new MemoryStream();
                    WaveFileWriter.WriteWavFileToStream(ms, w);
                    ms.Seek(0, SeekOrigin.Begin);
                    return ms;
                }
            }
        }
        public void Dispose()
        {
            client.Dispose();
        }
    }
}