feat: Implement API handlers for live and VOD streaming and create database module.

bin/api/streaming_handler.dart

@@ -116,7 +116,8 @@ PlaylistConfig? _getCurrentPlaylist(Request request) {
 // ==========================================
 
 Handler createLiveStreamHandler(
-    Future<PlaylistConfig?> Function(Request) getPlaylist) {
+    Future<PlaylistConfig?> Function(Request) getPlaylist,
+    {bool Function()? isGpuEnabled}) {
   final router = Router();
 
   // Route: /api/live/{streamId} (Catch all pattern to debug)
@@ -144,11 +145,13 @@ Handler createLiveStreamHandler(
         '${playlist.dns}/live/${playlist.username}/${playlist.password}/$streamId.ts';
     print('[Live] Streaming via FFmpeg: $targetUrl');
 
-    // Log GPU status once
-    _logGpuStatus();
+    // Check if NVIDIA GPU is enabled (from database setting or env var fallback)
+    final useNvidiaGpu = isGpuEnabled?.call() ?? _isNvidiaGpuEnabled();
 
-    // Check if NVIDIA GPU is enabled
-    final useNvidiaGpu = _isNvidiaGpuEnabled();
+    // Log GPU status
+    if (useNvidiaGpu) {
+      print('[Live] Using NVIDIA GPU acceleration (NVDEC)');
+    }
 
     // Build FFmpeg arguments
     final ffmpegArgs = <String>[
@@ -268,7 +271,8 @@ Handler createLiveStreamHandler(
 final _lastLogTime = <String, int>{};
 
 Handler createVodStreamHandler(
-    Future<PlaylistConfig?> Function(Request) getPlaylist) {
+    Future<PlaylistConfig?> Function(Request) getPlaylist,
+    {bool Function()? isGpuEnabled}) {
   final router = Router();
 
   // Route: /api/vod/{streamId}/playlist.m3u8
@@ -345,9 +349,12 @@ Handler createVodStreamHandler(
           '${playlist.dns}/$basePath/${playlist.username}/${playlist.password}/$streamId.mkv';
       print('[VOD] Starting Transcode ($contentType): $targetUrl');
 
-      // Log GPU status and check if enabled
-      _logGpuStatus();
-      final useNvidiaGpu = _isNvidiaGpuEnabled();
+      // Check if NVIDIA GPU is enabled (from database setting or env var fallback)
+      final useNvidiaGpu = isGpuEnabled?.call() ?? _isNvidiaGpuEnabled();
+
+      if (useNvidiaGpu) {
+        print('[VOD] Using NVIDIA GPU acceleration (NVENC)');
+      }
 
       // Build FFmpeg arguments
       final ffmpegArgs = <String>[

bin/database/database.dart

@@ -373,6 +373,29 @@ class AppDatabase {
     );
   }
 
+  /// Check if NVIDIA GPU is enabled in any user's settings
+  /// This is a server-wide setting that applies to all streaming
+  bool isNvidiaGpuEnabled() {
+    try {
+      // Check all user settings for enable_nvidia_gpu
+      final result = _db.select(
+        'SELECT settings_json FROM user_settings ORDER BY updated_at DESC LIMIT 1',
+      );
+
+      if (result.isEmpty) return false;
+
+      final settingsJson = result.first['settings_json'] as String;
+      // Parse JSON to check the setting
+      // Settings key: enable_nvidia_gpu
+      if (settingsJson.contains('"enable_nvidia_gpu":true')) {
+        return true;
+      }
+    } catch (e) {
+      print('[Database] Error checking GPU setting: $e');
+    }
+    return false;
+  }
+
   /// Close database connection
   void close() {
     _db.dispose();

bin/server.dart

@@ -172,8 +172,14 @@ void main(List<String> args) async {
 
   // Create Streaming Router (Mount handlers on correct paths)
   final streamingRouter = Router()
-    ..mount('/api/live', createLiveStreamHandler(getPlaylist))
-    ..mount('/api/vod', createVodStreamHandler(getPlaylist));
+    ..mount(
+        '/api/live',
+        createLiveStreamHandler(getPlaylist,
+            isGpuEnabled: db.isNvidiaGpuEnabled))
+    ..mount(
+        '/api/vod',
+        createVodStreamHandler(getPlaylist,
+            isGpuEnabled: db.isNvidiaGpuEnabled));
 
   // Main handler with API proxy and NEW Streaming Handlers
   final handler = Cascade()