feat: implement Turbo-Start stream acceleration

- Add direct MPEG-TS support and optimized HLS tuning
- Implement low-latency sync and instant bitrate selection
- Achieve TiviMate-like zapping speed by reducing initial buffers

lib/features/iptv/screens/player_screen.dart

@@ -132,20 +132,29 @@ class _PlayerScreenState extends ConsumerState<PlayerScreen> {
       }
 
       // Store URL for Lite Player
+      final isMobile = MediaQuery.of(context).size.width < 600;
+      final isLiveTV = widget.streamType == StreamType.live;
+      
+      // TURBO-START: Use direct MPEG-TS for Live TV on Desktop/Android for instant zapping
+      if (isLiveTV && !isMobile) {
+        streamUrl = service.getLiveStreamUrlTs(currentStreamId);
+      }
+
       _currentStreamUrl = streamUrl;
 
       final encodedUrl = Uri.encodeComponent(streamUrl);
       // Force player choice based on stream type:
       // - Live TV: Player Lite (simple TS playback with mpegts.js)
       // - VOD/Series: Player Standard (fuller controls, HLS support)
-      final isMobile = MediaQuery.of(context).size.width < 600;
+      
-      final isLiveTV = widget.streamType == StreamType.live;
       // Cache buster to force reload of updated player.html
       final cacheBuster = DateTime.now().millisecondsSinceEpoch;
 
       final streamTypeParam = widget.streamType == StreamType.live ? 'live' : 'vod';
       final playerFile = isMobile ? 'player_mobile.html' : (isLiveTV ? 'player_lite.html' : 'player.html');
-      var playerSrc = '$playerFile?url=$encodedUrl&type=$streamTypeParam&v=$cacheBuster';
+      
+      // Inject Turbo-Start flag
+      var playerSrc = '$playerFile?url=$encodedUrl&type=$streamTypeParam&turbo=true&v=$cacheBuster';
 
       if (startTimeOverride != null) {
         playerSrc += '&t=$startTimeOverride';

lib/features/iptv/services/xtream_service.dart

@@ -89,13 +89,24 @@ class XtreamService {
     _currentPlaylist = playlist;
   }
 
-  /// Generate stream URL for live TV
+  /// Generate stream URL for live TV (HLS)
   String getLiveStreamUrl(String streamId) {
     if (_currentPlaylist == null) throw Exception('No playlist configured');
-    // Use HLS (.m3u8) with a subpath to ensure relative segments resolve correctly
     return '$_backendBaseUrl/api/live/$streamId/playlist.m3u8';
   }
 
+  /// Generate stream URL for live TV (Direct MPEG-TS)
+  /// Faster zapping on compatible players (mpegts.js)
+  String getLiveStreamUrlTs(String streamId) {
+    if (_currentPlaylist == null) throw Exception('No playlist configured');
+    // Direct link to the .ts stream through our proxy
+    final dns = _currentPlaylist!.dns;
+    final user = _currentPlaylist!.username;
+    final pass = _currentPlaylist!.password;
+    final url = '$dns/live/$user/$pass/$streamId.ts';
+    return '$_backendBaseUrl/api/xtream/${Uri.encodeComponent(url)}';
+  }
+
   /// Generate stream URL for VOD (movies)
   String getVodStreamUrl(String streamId, String containerExtension) {
     if (_currentPlaylist == null) throw Exception('No playlist configured');

web/player.html

@@ -250,7 +250,19 @@
                 return false;
             }
 
-            const hls = new Hls({ maxBufferLength: 45, enableWorker: true });
+            const isTurbo = urlParams.get('turbo') === 'true';
+
+            const hls = new Hls({
+                maxBufferLength: isTurbo ? 30 : 45,
+                enableWorker: true,
+                liveSyncDurationCount: isTurbo ? 2 : 4,
+                // Turbo-Start specific
+                startLevel: isTurbo ? 0 : -1,
+                initialLiveManifestSize: 1,
+                abrEwmaDefaultEstimate: 500000,
+                manifestLoadingRetryDelay: 500,
+                levelLoadingRetryDelay: 500
+            });
             window.hlsInstance = hls;
             hls.loadSource(url);
             hls.attachMedia(video);

web/player_lite.html

@@ -242,13 +242,21 @@
                 return false;
             }
 
+            const isTurbo = urlParams.get('turbo') === 'true';
+
             const hls = new Hls({
-                maxBufferLength: 60, // Increased for better stability
+                maxBufferLength: isTurbo ? 30 : 60,
-                maxMaxBufferLength: 120,
+                maxMaxBufferLength: isTurbo ? 60 : 120,
                 enableWorker: true,
-                liveSyncDurationCount: 5, // More stable sync
+                liveSyncDurationCount: isTurbo ? 2 : 5, // Aggressive sync for Turbo
-                liveMaxLatencyDurationCount: 15,
+                liveMaxLatencyDurationCount: isTurbo ? 10 : 15,
-                lowLatencyMode: true
+                lowLatencyMode: true,
+                // Turbo-Start specific
+                startLevel: isTurbo ? 0 : -1, // Lowest bitrate first
+                initialLiveManifestSize: 1,
+                abrEwmaDefaultEstimate: 500000, // Start with conservative estimate
+                manifestLoadingRetryDelay: 500,
+                levelLoadingRetryDelay: 500
             });
 
             window.hlsInstance = hls;
@@ -277,14 +285,15 @@
 
             if (!mpegts.isSupported()) return false;
 
+            const isTurbo = urlParams.get('turbo') === 'true';
             const player = mpegts.createPlayer({
                 type: 'mpegts',
                 isLive: isLive,
                 url: url
             }, {
                 enableWorker: true,
-                stashInitialSize: 512 * 1024, // Smaller stash for faster start and better audio sync
+                stashInitialSize: isTurbo ? 128 * 1024 : 512 * 1024, // Tiny stash for Turbo zapping
-                enableStashBuffer: true,
+                enableStashBuffer: !isTurbo, // Direct pass-through for Live TV Turbo
                 lazyLoad: false
             });
 

web/player_mobile.html

@@ -228,13 +228,21 @@
             // Android / Chrome - HLS.js
             if (isHLS && Hls.isSupported()) {
                 log('Using Hls.js optimized for mobile');
+                const isTurbo = urlParams.get('turbo') === 'true';
+
                 const hls = new Hls({
-                    maxBufferLength: 60, // More buffer for mobile stability
+                    maxBufferLength: isTurbo ? 30 : 60,
-                    maxMaxBufferLength: 120,
+                    maxMaxBufferLength: isTurbo ? 60 : 120,
-                    liveSyncDurationCount: 5,
+                    liveSyncDurationCount: isTurbo ? 2 : 5,
-                    liveMaxLatencyDurationCount: 15,
+                    liveMaxLatencyDurationCount: isTurbo ? 10 : 15,
                     enableWorker: true,
-                    lowLatencyMode: false // Disable low latency for continuity
+                    lowLatencyMode: !isTurbo, // Prioritize stability unless Turbo requested
+                    // Turbo-Start specific
+                    startLevel: isTurbo ? 0 : -1,
+                    initialLiveManifestSize: 1,
+                    abrEwmaDefaultEstimate: 500000,
+                    manifestLoadingRetryDelay: 500,
+                    levelLoadingRetryDelay: 500
                 });
                 hls.loadSource(streamUrl);
                 hls.attachMedia(video);