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 +1,92 @@
+import 'package:camera/camera.dart';
+import 'package:flutter/foundation.dart';
+import 'package:flutter/services.dart';
+
+import 'frame_analyzer.dart';
+
+/// camera 插件封装：后摄图像流（对应 Kotlin CameraController）。
+class AppCameraController {
+  final List<CameraDescription> cameras;
+  CameraController? controller;
+
+  /// 图像流回调实际触发次数（诊断用，与 analyzer 帧计数区分）
+  int streamCallbacks = 0;
+
+  AppCameraController._(this.cameras);
+
+  static Future<AppCameraController?> create() async {
+    final cameras = await availableCameras();
+    if (cameras.isEmpty) return null;
+    return AppCameraController._(cameras);
+  }
+
+  bool get isInitialized => controller?.value.isInitialized ?? false;
+
+  CameraController get currentController =>
+      controller ?? (throw StateError('camera not initialized'));
+
+  /// 图像流送达时的旋转角（传感器 → 竖屏显示所需的顺时针旋转）。
+  /// 与 CameraX rotationDegrees 同公式；预览本身由平台旋转，检测框 overlay
+  /// 用同一角度映射即可对齐。
+  int get rotationDegrees {
+    final c = controller;
+    if (c == null) return 0;
+    final deviceDegrees = switch (c.value.deviceOrientation) {
+      DeviceOrientation.portraitUp => 0,
+      DeviceOrientation.landscapeLeft => 90,
+      DeviceOrientation.portraitDown => 180,
+      DeviceOrientation.landscapeRight => 270,
+    };
+    final sensor = c.description.sensorOrientation;
+    final isFront =
+        c.description.lensDirection == CameraLensDirection.front;
+    final degrees = (isFront ? sensor + deviceDegrees : sensor - deviceDegrees) % 360;
+    return degrees < 0 ? degrees + 360 : degrees;
+  }
+
+  Future<void> start(FrameAnalyzer analyzer) async {
+    await stop();
+    final desc = cameras.firstWhere(
+        (c) => c.lensDirection == CameraLensDirection.back,
+        orElse: () => cameras.first);
+    // iOS 用默认 bgra8888（420v 在部分 iOS 版本上视频输出静默不送帧），
+    // Android 用 yuv420 多平面。
+    final fmt = defaultTargetPlatform == TargetPlatform.iOS
+        ? ImageFormatGroup.bgra8888
+        : ImageFormatGroup.yuv420;
+    final c = CameraController(desc, ResolutionPreset.high,
+        enableAudio: false, imageFormatGroup: fmt);
+    controller = c;
+    await c.initialize();
+    // 相机（重新）启动后重置运动/背景参考与抽帧节流，避免旧场景残留
+    analyzer.reset();
+    analyzer.worker?.reset();
+    debugPrint('[camera] initialized, starting image stream');
+    try {
+      await c.startImageStream((image) {
+        streamCallbacks++;
+        try {
+          analyzer.analyze(image, rotationDegrees);
+        } catch (e, st) {
+          debugPrint('[camera] analyze error: $e\n$st');
+          analyzer.recordStreamError('analyze: $e');
+        }
+      });
+      debugPrint('[camera] startImageStream ok');
+    } catch (e, st) {
+      debugPrint('[camera] startImageStream FAILED: $e\n$st');
+      analyzer.recordStreamError('startImageStream: $e');
+      rethrow;
+    }
+  }
+
+  Future<void> stop() async {
+    final c = controller;
+    if (c == null) return;
+    controller = null;
+    try {
+      await c.stopImageStream();
+    } catch (_) {}
+    await c.dispose();
+  }
+}