TwitchUtils/TTSMe/TTSClient.cs

using System.Net.Http.Headers;
using System.Net.Http.Json;
using System.Text.Json.Serialization;
using LibVLCSharp.Shared;
using TwitchLib.Client.Models;

namespace TTSMe;

public static class TTSClient {
	private static readonly HttpClient httpClient = new() {
		DefaultRequestHeaders = {
			Authorization = new AuthenticationHeaderValue("Bearer", Environment.GetEnvironmentVariable("OPENAI_API_KEY")),
		},
		BaseAddress = new Uri("https://api.openai.com")
	};
	public const string AudioBasePath = @"C:\data\twitch\tts";

	public static async Task GenerateSpeech(ChatMessage chatMessage) {
		Console.WriteLine($"Generating speech as {chatMessage.GetAudioFilePath()} for {chatMessage.Username}: {chatMessage.Message}");
		HttpResponseMessage response = await httpClient.PostAsJsonAsync("v1/audio/speech", chatMessage.ToTTSRequest());
		await File.WriteAllBytesAsync(chatMessage.GetAudioFilePath(), await response.Content.ReadAsByteArrayAsync());
	}
	
	public static async Task PlaySpeech(string path) {
		try {
			await Task.Run(() => {
				TaskCompletionSource<bool> taskCompletionSource = new();
				using LibVLC libVLC = new();
				if (TtsMeCommand.VERBOSE) libVLC.Log += (_, e) => Console.WriteLine($"LibVLC [{e.Level}] {e.Module}:{e.Message}");
				using Media media = new(libVLC, path);
				using MediaPlayer player = new(media);
				
				player.EndReached += OnEndReached;
				player.Play();
				player.EndReached += (_, _) => taskCompletionSource.TrySetResult(true);
				taskCompletionSource.Task.Wait();
				player.Stop();
			});
		} catch (Exception ex) {
			Console.WriteLine($"An error occurred during playback: {ex.Message}");
		}
	}

	private static void OnEndReached(object? sender, EventArgs _) {
		if (sender is MediaPlayer mediaPlayer) mediaPlayer.Stop();
	}
}
internal record TextToSpeechRequest(
	[property: JsonPropertyName("input")] string Input,
	[property: JsonPropertyName("voice")] string Voice,
	[property: JsonPropertyName("model")] string Model = "tts-1",
	[property: JsonPropertyName("response_format")] string ResponseFormat = "mp3",
	[property: JsonPropertyName("speed")] double Speed = 1.0
);