迁移 Flutter 端与训练脚本，模型/训练产物移出 git（遵循纯代码约定）

2026-08-24 12:35:24 +08:00
parent d056f01965
commit 961523d94c
218 changed files with 13391 additions and 3232 deletions
@@ -0,0 +1,97 @@
+import 'package:camera/camera.dart';
+
+import '../detection/detection_result.dart';
+import '../detection/detector_worker.dart';
+import 'camera_view_model.dart';
+
+/// 抽帧节流 + 后台推理（对应 Kotlin FrameAnalyzer）。
+/// 推理在后台 isolate（DetectorWorker）执行，主 isolate 只投递帧与收结果。
+class FrameAnalyzer {
+  /// 连续检测：100ms 一帧
+  int intervalMs = 100;
+
+  /// null = 模型加载失败，仅预览不分析
+  final DetectorWorker? worker;
+  final CameraViewModel viewModel;
+
+  int _lastDetectMs = 0;
+
+  /// 诊断计数：推理调用/异常次数
+  int detectCalls = 0;
+  int detectErrors = 0;
+  String? lastError;
+
+  /// 最近一次完整处理（预处理+推理+运动检测）耗时 ms（worker 侧）
+  int lastProcessMs = 0;
+
+  /// 图像流回调是否到达（诊断用）
+  int framesReceived = 0;
+
+  FrameAnalyzer({required this.worker, required this.viewModel}) {
+    worker?.onResult = _onResult;
+    worker?.onError = _onError;
+  }
+
+  void recordStreamError(String msg) {
+    lastError = msg;
+    detectErrors++;
+  }
+
+  void _onResult(
+      List<DetectionResult> results,
+      List<MotionRegion> motion,
+      List<MotionRegion> novelty,
+      int rotation,
+      int width,
+      int height,
+      int processMs) {
+    detectCalls++;
+    lastProcessMs = processMs;
+    viewModel.onFramesAnalyzed(
+      results,
+      rotation,
+      width,
+      height,
+      motion,
+      novelty,
+      detectCalls: detectCalls,
+      detectErrors: detectErrors,
+      lastError: lastError,
+      framesReceived: framesReceived,
+      lastProcessMs: lastProcessMs,
+    );
+  }
+
+  void _onError(String msg) {
+    detectErrors++;
+    lastError = msg;
+    viewModel.onFramesAnalyzed(
+      const [],
+      90,
+      0,
+      0,
+      const [],
+      const [],
+      detectCalls: detectCalls,
+      detectErrors: detectErrors,
+      lastError: lastError,
+      framesReceived: framesReceived,
+      lastProcessMs: lastProcessMs,
+    );
+  }
+
+  void analyze(CameraImage image, int rotationDegrees) {
+    framesReceived++;
+    final w = worker;
+    if (w == null) return;
+    final now = DateTime.now().millisecondsSinceEpoch;
+    if (now - _lastDetectMs < intervalMs) return;
+    _lastDetectMs = now;
+    if (w.busy) return; // 上一帧未返回则丢帧，避免在途积压
+    w.analyze(image, rotationDegrees);
+  }
+
+  void reset() => _lastDetectMs = 0;
+
+  void dispose() => worker?.dispose();
+}