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media-worker/Services/TtsService.cs

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+using System.Net.Http.Headers;
+using System.Text;
+using System.Text.Json;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Options;
+using SaasMediaWorker.Configuration;
+using SaasMediaWorker.Models;
+
+namespace SaasMediaWorker.Services;
+
+/// <summary>
+/// ElevenLabs TTS API Client — Metin → Ses dönüşümü.
+/// Her sahnenin narrationText'ini sese çevirir.
+/// </summary>
+public class TtsService
+{
+    private readonly HttpClient _httpClient;
+    private readonly ILogger<TtsService> _logger;
+    private readonly ApiSettings _settings;
+
+    public TtsService(
+        HttpClient httpClient,
+        ILogger<TtsService> logger,
+        IOptions<ApiSettings> settings)
+    {
+        _httpClient = httpClient;
+        _logger = logger;
+        _settings = settings.Value;
+
+        _httpClient.BaseAddress = new Uri(_settings.TtsBaseUrl);
+        _httpClient.DefaultRequestHeaders.Add("xi-api-key", _settings.TtsApiKey);
+        _httpClient.Timeout = TimeSpan.FromMinutes(2);
+    }
+
+    /// <summary>
+    /// Bir sahnenin narration metnini sese çevirir ve dosyaya kaydeder.
+    /// </summary>
+    public async Task<GeneratedMediaFile> GenerateNarrationAsync(
+        ScenePayload scene,
+        string outputDirectory,
+        string voiceStyle,
+        CancellationToken ct)
+    {
+        _logger.LogInformation(
+            "🎙️ TTS üretimi — Sahne {Order}: \"{Text}\"",
+            scene.Order,
+            scene.NarrationText[..Math.Min(60, scene.NarrationText.Length)]);
+
+        var voiceId = _settings.TtsVoiceId;
+        var requestBody = new
+        {
+            text = scene.NarrationText,
+            model_id = "eleven_multilingual_v2",
+            voice_settings = new
+            {
+                stability = 0.5,
+                similarity_boost = 0.75,
+                style = 0.3,
+                use_speaker_boost = true
+            }
+        };
+
+        var content = new StringContent(
+            JsonSerializer.Serialize(requestBody),
+            Encoding.UTF8,
+            "application/json");
+
+        content.Headers.ContentType = new MediaTypeHeaderValue("application/json");
+
+        var response = await _httpClient.PostAsync(
+            $"/text-to-speech/{voiceId}",
+            content, ct);
+
+        response.EnsureSuccessStatusCode();
+
+        // Ses dosyasını kaydet
+        var outputPath = Path.Combine(outputDirectory, $"scene_{scene.Order:D2}_narration.mp3");
+        await using var fileStream = File.Create(outputPath);
+        await response.Content.CopyToAsync(fileStream, ct);
+
+        var fileInfo = new FileInfo(outputPath);
+
+        _logger.LogInformation(
+            "TTS tamamlandı — Sahne {Order}: {Size} bytes",
+            scene.Order, fileInfo.Length);
+
+        return new GeneratedMediaFile
+        {
+            SceneId = scene.Id,
+            SceneOrder = scene.Order,
+            Type = MediaFileType.AudioNarration,
+            LocalPath = outputPath,
+            FileSizeBytes = fileInfo.Length,
+            DurationSeconds = scene.Duration,
+            MimeType = "audio/mpeg",
+            AiProvider = "elevenlabs"
+        };
+    }
+}