Initial commit

2026-07-14 11:11:36 +08:00
commit 656499cf94
604 changed files with 119518 additions and 0 deletions
@@ -0,0 +1,75 @@
+import 'dart:async';
+
+import 'package:fvp/mdk.dart' as mdk;
+
+import '../../shared/utils/app_logger.dart';
+import 'media_capability_analyzer.dart';
+
+
+class MediaProbeService {
+  static final MediaProbeService instance = MediaProbeService._();
+  MediaProbeService._();
+
+  static const _tag = 'MediaProbe';
+
+  final Map<String, ProbeResult> _cache = {};
+
+  Future<ProbeResult?> probe(
+    String url, {
+    Duration timeout = const Duration(seconds: 5),
+  }) async {
+    final cached = _cache[url];
+    if (cached != null) {
+      AppLogger.debug(_tag, 'probe: cache hit url=${_truncate(url)}');
+      return cached;
+    }
+
+    AppLogger.debug(_tag, 'probe: start url=${_truncate(url)}');
+
+    mdk.Player? player;
+    try {
+      player = mdk.Player()
+        ..setProperty('avio.reconnect', '1')
+        ..setProperty('avformat.extension_picky', '0')
+        ..setProperty('avformat.allowed_segment_extensions', 'ALL');
+      player.media = url;
+
+      final ret = await player.prepare().timeout(timeout, onTimeout: () => -10);
+
+      ProbeResult? result;
+      if (ret >= 0) {
+        final video = player.mediaInfo.video;
+        if (video != null && video.isNotEmpty) {
+          final codec = video.first.codec;
+          result = ProbeResult(
+            videoCodec: codec.codec.isNotEmpty ? codec.codec : null,
+          );
+        }
+      } else {
+        AppLogger.warn(
+          _tag,
+          'probe: prepare failed ret=$ret url=${_truncate(url)}',
+        );
+      }
+
+      if (result != null) {
+        _cache[url] = result;
+        AppLogger.debug(
+          _tag,
+          'probe: success url=${_truncate(url)} codec=${result.videoCodec}',
+        );
+      }
+
+      return result;
+    } catch (e) {
+      AppLogger.warn(_tag, 'probe: error url=${_truncate(url)}', e);
+      return null;
+    } finally {
+      player?.dispose();
+    }
+  }
+
+  static String _truncate(String url) {
+    return url.length > 50 ? '${url.substring(0, 50)}...' : url;
+  }
+}