chore: import upstream snapshot with attribution

2026-07-13 13:21:23 +08:00
commit b957a53def
5423 changed files with 863745 additions and 0 deletions
@@ -0,0 +1,40 @@
+// Copyright (c) Microsoft. All rights reserved.
+
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Options;
+using OpenAI.Audio;
+
+public class TextToSpeechService
+{
+    // Text-to-Speech synthesis constants
+    private static readonly GeneratedSpeechVoice s_defaultSpeechVoice = GeneratedSpeechVoice.Alloy;  // OpenAI voice selection for TTS
+
+    private readonly ILogger<TextToSpeechService> _logger;
+    private readonly AudioClient _audioClient;
+
+    public TextToSpeechService(ILogger<TextToSpeechService> logger, IOptions<OpenAIOptions> openAIOptions)
+    {
+        this._logger = logger;
+        var options = openAIOptions.Value;
+        this._audioClient = new AudioClient(options.SpeechModelId, options.ApiKey);
+    }
+
+    // Pipeline integration method for transforming chat events into speech events.
+    public async Task<SpeechEvent> TransformAsync(ChatEvent evt) =>
+        new(evt.TurnId, evt.CancellationToken, await this.SynthesizeAsync(evt.Payload, evt.CancellationToken));
+
+    // Synthesizes speech from text using OpenAI's TTS API.
+    private Task<byte[]> SynthesizeAsync(string text, CancellationToken token) =>
+        Tools.ExecutePipelineOperationAsync(
+            operation: async () =>
+            {
+                BinaryData speech = await this._audioClient.GenerateSpeechAsync(text, s_defaultSpeechVoice, null, token);
+                return speech.ToArray();
+            },
+            operationName: "TTS",
+            logger: this._logger,
+            cancellationToken: token,
+            defaultValue: Array.Empty<byte>(),
+            resultFormatter: audioData => $"text: {text}. Audio size: {audioData.Length} bytes"
+        );
+}