dsh/dual_camera_system/panorama_camera.py

"""
全景摄像头模块
负责获取视频流和物体检测
"""

import os
# 必须在导入cv2之前设置，防止FFmpeg多线程解码崩溃
# pthread_frame.c:167 async_lock assertion
os.environ['OPENCV_FFMPEG_CAPTURE_OPTIONS'] = 'threads;1'

import cv2
import numpy as np
import threading
import queue
import time
from typing import Optional, List, Tuple, Dict, Any
from dataclasses import dataclass

from config import PANORAMA_CAMERA, DETECTION_CONFIG
from dahua_sdk import DahuaSDK, PTZCommand
from video_lock import safe_read, safe_is_opened


@dataclass
class DetectedObject:
    """检测到的物体"""
    class_name: str          # 类别名称
    confidence: float        # 置信度
    bbox: Tuple[int, int, int, int]  # 边界框 (x, y, width, height)
    center: Tuple[int, int]  # 中心点坐标
    track_id: Optional[int] = None  # 跟踪ID


class PanoramaCamera:
    """全景摄像头类"""
    
    def __init__(self, sdk: DahuaSDK, camera_config: Dict = None):
        """
        初始化全景摄像头
        Args:
            sdk: 大华SDK实例
            camera_config: 摄像头配置
        """
        self.sdk = sdk
        self.config = camera_config or PANORAMA_CAMERA
        
        self.login_handle = None
        self.play_handle = None
        self.connected = False
        
        # 视频流
        self.frame_queue = queue.Queue(maxsize=10)
        self.current_frame = None
        self.frame_lock = threading.Lock()
        self.rtsp_cap = None  # RTSP视频捕获
        self._camera_id = 'panorama'  # 用于per-camera锁
        
        # 检测器
        self.detector = None
        
        # 控制标志
        self.running = False
        self.stream_thread = None
        
        # 断线重连
        self.auto_reconnect = True
        self.reconnect_interval = 5.0  # 重连间隔(秒)
        self.max_reconnect_attempts = 3  # 最大重连次数
    
    def connect(self) -> bool:
        """
        连接摄像头
        Returns:
            是否成功
        """
        login_handle, error = self.sdk.login(
            self.config['ip'],
            self.config['port'],
            self.config['username'],
            self.config['password']
        )
        
        if login_handle is None:
            print(f"连接全景摄像头失败: IP={self.config['ip']}, 错误码={error}")
            return False
        
        self.login_handle = login_handle
        self.connected = True
        print(f"成功连接全景摄像头: {self.config['ip']}")
        return True
    
    def disconnect(self):
        """断开连接"""
        self.stop_stream()
        if self.login_handle:
            self.sdk.logout(self.login_handle)
            self.login_handle = None
        self.connected = False
    
    def start_stream(self) -> bool:
        """
        开始视频流
        Returns:
            是否成功
        """
        if not self.connected:
            return False
        
        self.play_handle = self.sdk.real_play(
            self.login_handle, 
            self.config['channel']
        )
        
        if self.play_handle is None:
            print("启动视频流失败")
            return False
        
        self.running = True
        self.stream_thread = threading.Thread(target=self._stream_worker, daemon=True)
        self.stream_thread.start()
        
        print("视频流已启动")
        return True
    
    def start_stream_rtsp(self, rtsp_url: str = None) -> bool:
        if rtsp_url is None:
            rtsp_url = self.config.get('rtsp_url') or f"rtsp://{self.config['username']}:{self.config['password']}@{self.config['ip']}:{self.config.get('rtsp_port', 554)}/h264/ch{self.config['channel']}/main/av_stream"
        
        try:
            # 先尝试FFmpeg后端
            self.rtsp_cap = cv2.VideoCapture(rtsp_url, cv2.CAP_FFMPEG)
            if not self.rtsp_cap.isOpened():
                # FFmpeg失败，尝试GStreamer后端
                print(f"FFmpeg后端无法打开RTSP流，尝试GStreamer后端...")
                try:
                    gst_cap = cv2.VideoCapture(rtsp_url, cv2.CAP_GSTREAMER)
                    if gst_cap.isOpened():
                        self.rtsp_cap = gst_cap
                        print(f"使用GStreamer后端打开RTSP流成功")
                    else:
                        print(f"无法打开RTSP流: {rtsp_url}")
                        return False
                except Exception as ge:
                    print(f"GStreamer后端也不可用: {ge}")
                    return False
            
            self.rtsp_cap.set(cv2.CAP_PROP_BUFFERSIZE, 1)
            
            self.running = True
            self.stream_thread = threading.Thread(target=self._rtsp_stream_worker, daemon=True)
            self.stream_thread.start()
            print(f"RTSP视频流已启动: {rtsp_url}")
            return True
        except Exception as e:
            print(f"RTSP流启动失败: {e}")
            return False
    
    def _stream_worker(self):
        """视频流工作线程 (SDK模式)"""
        retry_count = 0
        max_retries = 10
        
        while self.running:
            try:
                # 尝试从 SDK 帧缓冲区获取帧 (如果可用)
                frame_buffer = self.sdk.get_video_frame_buffer(self.config['channel'])
                
                if frame_buffer:
                    frame_info = frame_buffer.get(timeout=0.1)
                    if frame_info and frame_info.get('data'):
                        # 解码帧数据 (如果需要)
                        # 注意: SDK回调返回的是编码数据，需要解码
                        # 这里暂时跳过，因为解码需要额外处理
                        pass
                
                # RTSP 模式获取帧 (推荐方式)
                if self.rtsp_cap is not None and safe_is_opened(self.rtsp_cap, self._camera_id):
                    ret, frame = safe_read(self.rtsp_cap, self._camera_id)
                    if ret and frame is not None:
                        with self.frame_lock:
                            self.current_frame = frame.copy()
                        
                        try:
                            self.frame_queue.put(frame.copy(), block=False)
                        except queue.Full:
                            pass
                        
                        retry_count = 0  # 重置重试计数
                        time.sleep(0.001)  # 减少CPU占用
                        continue
                
                # 如果 RTSP 不可用，尝试自动连接
                if retry_count < max_retries:
                    rtsp_url = self._build_rtsp_url()
                    try:
                        if self.rtsp_cap is None:
                            self.rtsp_cap = cv2.VideoCapture(rtsp_url, cv2.CAP_FFMPEG)
                            self.rtsp_cap.set(cv2.CAP_PROP_BUFFERSIZE, 1)  # 减少缓冲延迟
                        
                        if safe_is_opened(self.rtsp_cap, self._camera_id):
                            retry_count = 0
                            continue
                    except Exception as e:
                        pass
                    
                    retry_count += 1
                    time.sleep(1.0)  # 重试间隔
                else:
                    # 超过最大重试次数，使用模拟帧
                    frame = np.zeros((1080, 1920, 3), dtype=np.uint8)
                    
                    with self.frame_lock:
                        self.current_frame = frame
                    
                    try:
                        self.frame_queue.put(frame, block=False)
                    except queue.Full:
                        pass
                    
                    time.sleep(0.1)
                
            except Exception as e:
                err_str = str(e)
                if 'async_lock' in err_str or 'Assertion' in err_str:
                    print(f"视频流FFmpeg内部错误，重建连接: {e}")
                    self._reconnect_rtsp()
                else:
                    print(f"视频流错误: {e}")
                time.sleep(0.5)
    
    def _build_rtsp_url(self) -> str:
        return self.config.get('rtsp_url') or f"rtsp://{self.config['username']}:{self.config['password']}@{self.config['ip']}:{self.config.get('rtsp_port', 554)}/h264/ch{self.config['channel']}/main/av_stream"
    
    def _rtsp_stream_worker(self):
        """RTSP视频流工作线程"""
        import signal
        # 屏蔽SIGINT在此线程，由主线程处理
        if hasattr(signal, 'pthread_sigmask'):
            try:
                signal.pthread_sigmask(signal.SIG_BLOCK, {signal.SIGINT})
            except (AttributeError, OSError):
                pass
        
        max_consecutive_errors = 50
        error_count = 0
        
        while self.running:
            try:
                if self.rtsp_cap is None or not safe_is_opened(self.rtsp_cap, self._camera_id):
                    time.sleep(0.1)
                    continue
                
                ret, frame = safe_read(self.rtsp_cap, self._camera_id)
                if not ret or frame is None:
                    error_count += 1
                    if error_count > max_consecutive_errors:
                        print(f"全景RTSP流连续{max_consecutive_errors}次读取失败，尝试重连...")
                        self._reconnect_rtsp()
                        error_count = 0
                    time.sleep(0.01)
                    continue
                
                error_count = 0
                
                with self.frame_lock:
                    self.current_frame = frame.copy()
                
                try:
                    self.frame_queue.put(frame, block=False)
                except queue.Full:
                    pass
                    
            except Exception as e:
                err_str = str(e)
                if 'async_lock' in err_str or 'Assertion' in err_str:
                    print(f"全景RTSP流FFmpeg内部错误，3秒后重建连接: {e}")
                    time.sleep(3)
                    self._reconnect_rtsp()
                else:
                    print(f"全景RTSP视频流错误: {e}")
                    time.sleep(0.5)
    
    def _reconnect_rtsp(self):
        """重建RTSP连接"""
        rtsp_url = self._build_rtsp_url()
        if self.rtsp_cap is not None:
            try:
                self.rtsp_cap.release()
            except Exception:
                pass
            self.rtsp_cap = None
        
        time.sleep(1)
        
        try:
            self.rtsp_cap = cv2.VideoCapture(rtsp_url, cv2.CAP_FFMPEG)
            if safe_is_opened(self.rtsp_cap, self._camera_id):
                self.rtsp_cap.set(cv2.CAP_PROP_BUFFERSIZE, 1)
                print("全景RTSP流重连成功")
            else:
                print("全景RTSP流重连失败")
                self.rtsp_cap = None
        except Exception as e:
            print(f"全景RTSP流重连异常: {e}")
            self.rtsp_cap = None
    
    def stop_stream(self):
        """停止视频流"""
        self.running = False
        if self.stream_thread:
            self.stream_thread.join(timeout=2)
        if self.play_handle:
            self.sdk.stop_real_play(self.play_handle)
            self.play_handle = None
        if self.rtsp_cap:
            self.rtsp_cap.release()
            self.rtsp_cap = None
    
    def get_frame(self) -> Optional[np.ndarray]:
        """
        获取当前帧
        Returns:
            当前帧图像
        """
        with self.frame_lock:
            return self.current_frame.copy() if self.current_frame is not None else None
    
    def get_frame_from_queue(self, timeout: float = 0.1) -> Optional[np.ndarray]:
        """
        从帧队列获取帧 (用于批量处理)
        Args:
            timeout: 等待超时时间
        Returns:
            帧图像或None
        """
        try:
            return self.frame_queue.get(timeout=timeout)
        except:
            return None
    
    def get_frame_buffer(self, count: int = 5) -> List[np.ndarray]:
        """
        获取帧缓冲 (用于运动检测等需要多帧的场景)
        Args:
            count: 获取帧数
        Returns:
            帧列表
        """
        frames = []
        while len(frames) < count:
            frame = self.get_frame_from_queue(timeout=0.05)
            if frame is not None:
                frames.append(frame)
            else:
                break
        return frames
    
    def set_detector(self, detector):
        """设置物体检测器"""
        self.detector = detector
    
    def detect_objects(self, frame: np.ndarray = None) -> List[DetectedObject]:
        """
        检测物体
        Args:
            frame: 输入帧,如果为None则使用当前帧
        Returns:
            检测到的物体列表
        """
        if frame is None:
            frame = self.get_frame()
        
        if frame is None or self.detector is None:
            return []
        
        return self.detector.detect(frame)
    
    def get_detection_position(self, obj: DetectedObject, 
                               frame_size: Tuple[int, int]) -> Tuple[float, float]:
        """
        获取检测物体在画面中的相对位置
        Args:
            obj: 检测到的物体
            frame_size: 画面尺寸 (width, height)
        Returns:
            相对位置 (x_ratio, y_ratio) 范围0-1
        """
        width, height = frame_size
        x_ratio = obj.center[0] / width
        y_ratio = obj.center[1] / height
        return (x_ratio, y_ratio)


class ObjectDetector:
    """
    物体检测器
    使用YOLO11模型进行人体检测
    支持 YOLO (.pt), RKNN (.rknn), ONNX (.onnx) 模型
    """
    
    def __init__(self, model_path: str = None, use_gpu: bool = True, model_size: str = 'n',
                 model_type: str = 'auto'):
        """
        初始化检测器
        Args:
            model_path: 模型路径 (支持 .pt, .rknn, .onnx)
            use_gpu: 是否使用GPU
            model_size: 模型尺寸 ('n', 's', 'm', 'l', 'x') - 仅 YOLO 模型有效
            model_type: 模型类型 ('auto', 'yolo', 'rknn', 'onnx')
        """
        self.model = None
        self.rknn_detector = None
        self.model_path = model_path
        self.use_gpu = use_gpu
        self.model_size = model_size
        self.model_type = model_type
        self.config = DETECTION_CONFIG
        self.device = 'cuda:0' if use_gpu else 'cpu'
        
        # 根据扩展名自动判断模型类型
        if model_path:
            ext = os.path.splitext(model_path)[1].lower()
            if ext == '.rknn':
                self.model_type = 'rknn'
            elif ext == '.onnx':
                self.model_type = 'onnx'
            elif ext == '.pt':
                self.model_type = 'yolo'
        
        self._load_model()
    
    def _load_model(self):
        """加载检测模型"""
        if self.model_type == 'rknn':
            self._load_rknn_model()
        elif self.model_type == 'onnx':
            self._load_onnx_model()
        else:
            self._load_yolo_model()
    
    def _load_rknn_model(self):
        """加载 RKNN 模型"""
        if not self.model_path:
            raise ValueError("RKNN 模型需要指定 model_path")
        
        try:
            from rknnlite.api import RKNNLite
            
            self.rknn = RKNNLite()
            ret = self.rknn.load_rknn(self.model_path)
            if ret != 0:
                raise RuntimeError(f"加载 RKNN 模型失败: {self.model_path}")
            
            ret = self.rknn.init_runtime(core_mask=RKNNLite.NPU_CORE_0_1_2)
            if ret != 0:
                raise RuntimeError(f"初始化 RKNN 运行时失败")
            
            print(f"RKNN 模型加载成功: {self.model_path}")
        except ImportError:
            raise ImportError("未安装 rknnlite，请运行: pip install rknnlite2")
    
    def _load_onnx_model(self):
        """加载 ONNX 模型"""
        if not self.model_path:
            raise ValueError("ONNX 模型需要指定 model_path")
        
        try:
            import onnxruntime as ort
            self.session = ort.InferenceSession(self.model_path)
            self.input_name = self.session.get_inputs()[0].name
            self.output_name = self.session.get_outputs()[0].name
            print(f"ONNX 模型加载成功: {self.model_path}")
        except ImportError:
            raise ImportError("未安装 onnxruntime，请运行: pip install onnxruntime")
    
    def _load_yolo_model(self):
        """加载YOLO11检测模型"""
        try:
            from ultralytics import YOLO
            
            if self.model_path:
                self.model = YOLO(self.model_path)
            else:
                model_name = f'yolo11{self.model_size}.pt'
                self.model = YOLO(model_name)
            
            dummy = np.zeros((640, 640, 3), dtype=np.uint8)
            self.model(dummy, device=self.device, verbose=False)
            
            print(f"成功加载YOLO11检测模型 (device={self.device})")
        except ImportError:
            print("未安装ultralytics,请运行: pip install ultralytics")
            self._load_opencv_model()
        except Exception as e:
            print(f"加载YOLO11模型失败: {e}")
            self._load_opencv_model()
    
    def _load_opencv_model(self):
        """使用OpenCV加载模型"""
        pass
    
    def _letterbox(self, image, size=(640, 640)):
        """Letterbox 预处理"""
        h0, w0 = image.shape[:2]
        ih, iw = size
        scale = min(iw / w0, ih / h0)
        new_w, new_h = int(w0 * scale), int(h0 * scale)
        pad_w = (iw - new_w) // 2
        pad_h = (ih - new_h) // 2
        resized = cv2.resize(image, (new_w, new_h))
        canvas = np.full((ih, iw, 3), 114, dtype=np.uint8)
        canvas[pad_h:pad_h+new_h, pad_w:pad_w+new_w] = resized
        return canvas, scale, pad_w, pad_h, h0, w0
    
    def _detect_rknn(self, frame: np.ndarray) -> List[DetectedObject]:
        """使用 RKNN/ONNX 模型检测"""
        results = []
        
        try:
            canvas, scale, pad_w, pad_h, h0, w0 = self._letterbox(frame)
            
            if hasattr(self, 'rknn'):
                # RKNN
                img = canvas[..., ::-1].astype(np.float32) / 255.0
                blob = img[None, ...]
                outputs = self.rknn.inference(inputs=[blob])
            else:
                # ONNX
                img = canvas[..., ::-1].astype(np.float32) / 255.0
                img = img.transpose(2, 0, 1)
                blob = img[None, ...]
                outputs = self.session.run([self.output_name], {self.input_name: blob})
            
            output = outputs[0]
            if len(output.shape) == 3:
                output = output[0]
            
            num_boxes = output.shape[1]
            conf_threshold = self.config['confidence_threshold']
            
            for i in range(num_boxes):
                x_center = float(output[0, i])
                y_center = float(output[1, i])
                width = float(output[2, i])
                height = float(output[3, i])
                
                class_probs = output[4:, i]
                best_class = int(np.argmax(class_probs))
                confidence = float(class_probs[best_class])
                
                if confidence < conf_threshold:
                    continue
                
                # 转换到原始图像坐标
                x1 = int(((x_center - width / 2) - pad_w) / scale)
                y1 = int(((y_center - height / 2) - pad_h) / scale)
                x2 = int(((x_center + width / 2) - pad_w) / scale)
                y2 = int(((y_center + height / 2) - pad_h) / scale)
                
                x1 = max(0, min(w0, x1))
                y1 = max(0, min(h0, y1))
                x2 = max(0, min(w0, x2))
                y2 = max(0, min(h0, y2))
                
                if x2 - x1 < 10 or y2 - y1 < 10:
                    continue
                
                # 使用配置的类别映射获取类别名称
                class_map = self.config.get('class_map', {0: 'person', 3: '人'})
                cls_name = class_map.get(best_class, str(best_class))
                
                # 检查是否为目标类别
                if cls_name not in self.config['target_classes']:
                    continue
                
                obj = DetectedObject(
                    class_name=cls_name,
                    confidence=confidence,
                    bbox=(x1, y1, x2 - x1, y2 - y1),
                    center=((x1 + x2) // 2, (y1 + y2) // 2)
                )
                results.append(obj)
                
        except Exception as e:
            print(f"RKNN/ONNX 检测错误: {e}")
        
        return results
    
    def detect(self, frame: np.ndarray) -> List[DetectedObject]:
        """
        使用YOLO11检测物体
        Args:
            frame: 输入图像
        Returns:
            检测结果列表
        """
        if frame is None:
            return []
        
        # 优先使用 RKNN/ONNX 模型
        if hasattr(self, 'rknn') and self.rknn is not None:
            return self._detect_rknn(frame)
        elif hasattr(self, 'session') and self.session is not None:
            return self._detect_rknn(frame)
        # 使用 YOLO 模型
        elif self.model is not None:
            return self._detect_yolo(frame)
        else:
            print("[错误] 没有可用的检测模型")
            return []
    
    def _detect_yolo(self, frame: np.ndarray) -> List[DetectedObject]:
        """使用 YOLO 模型检测"""
        results = []
        
        try:
            detections = self.model(
                frame, 
                device=self.device, 
                verbose=False,
                conf=self.config['confidence_threshold']
            )
            
            for det in detections:
                boxes = det.boxes
                if boxes is None:
                    continue
                    
                for i in range(len(boxes)):
                    cls_id = int(boxes.cls[i])
                    cls_name = det.names[cls_id]
                    
                    if cls_name not in self.config['target_classes']:
                        continue
                    
                    conf = float(boxes.conf[i])
                    
                    xyxy = boxes.xyxy[i].cpu().numpy()
                    x1, y1, x2, y2 = map(int, xyxy)
                    width = x2 - x1
                    height = y2 - y1
                    
                    if width < 10 or height < 10:
                        continue
                    
                    center_x = x1 + width // 2
                    center_y = y1 + height // 2
                    
                    obj = DetectedObject(
                        class_name=cls_name,
                        confidence=conf,
                        bbox=(x1, y1, width, height),
                        center=(center_x, center_y)
                    )
                    results.append(obj)
                    
        except Exception as e:
            print(f"YOLO11检测错误: {e}")
        
        return results
    
    def detect_with_keypoints(self, frame: np.ndarray) -> List[DetectedObject]:
        """
        使用YOLO11-pose检测人体并返回关键点
        Args:
            frame: 输入图像
        Returns:
            带关键点的检测结果列表
        """
        return self.detect(frame)
    
    def detect_persons(self, frame: np.ndarray) -> List[DetectedObject]:
        """
        检测人体
        Args:
            frame: 输入图像
        Returns:
            检测到的人体列表
        """
        results = self.detect(frame)
        return [obj for obj in results if obj.class_name == 'person']
    
    def release(self):
        """释放模型资源"""
        if hasattr(self, 'rknn') and self.rknn:
            self.rknn.release()
            self.rknn = None
        self.model = None
        self.session = None


class PersonTracker:
    """
    人体跟踪器
    使用简单的质心跟踪算法
    """
    
    def __init__(self, max_disappeared: int = 30):
        """
        初始化跟踪器
        Args:
            max_disappeared: 最大消失帧数
        """
        self.max_disappeared = max_disappeared
        self.next_id = 0
        self.objects = {}  # id -> center
        self.disappeared = {}  # id -> disappeared count
    
    def update(self, detections: List[DetectedObject]) -> List[DetectedObject]:
        """
        更新跟踪状态
        Args:
            detections: 当前帧检测结果
        Returns:
            带有跟踪ID的检测结果
        """
        # 如果没有检测结果
        if len(detections) == 0:
            # 标记所有已跟踪对象为消失
            for obj_id in list(self.disappeared.keys()):
                self.disappeared[obj_id] += 1
                if self.disappeared[obj_id] > self.max_disappeared:
                    self._deregister(obj_id)
            return []
        
        # 计算当前检测中心点
        input_centers = np.array([d.center for d in detections])
        
        # 如果没有已跟踪对象
        if len(self.objects) == 0:
            for det in detections:
                self._register(det)
        else:
            # 计算距离矩阵
            object_ids = list(self.objects.keys())
            object_centers = np.array([self.objects[obj_id] for obj_id in object_ids])
            
            # 计算欧氏距离
            distances = np.linalg.norm(
                object_centers[:, np.newaxis] - input_centers, 
                axis=2
            )
            
            # 匈牙利算法匹配 (简化版: 贪心匹配)
            rows = distances.min(axis=1).argsort()
            cols = distances.argmin(axis=1)[rows]
            
            used_rows = set()
            used_cols = set()
            
            for (row, col) in zip(rows, cols):
                if row in used_rows or col in used_cols:
                    continue
                
                obj_id = object_ids[row]
                self.objects[obj_id] = input_centers[col]
                self.disappeared[obj_id] = 0
                detections[col].track_id = obj_id
                
                used_rows.add(row)
                used_cols.add(col)
            
            # 处理未匹配的已跟踪对象
            unused_rows = set(range(len(object_ids))) - used_rows
            for row in unused_rows:
                obj_id = object_ids[row]
                self.disappeared[obj_id] += 1
                if self.disappeared[obj_id] > self.max_disappeared:
                    self._deregister(obj_id)
            
            # 处理未匹配的新检测
            unused_cols = set(range(len(input_centers))) - used_cols
            for col in unused_cols:
                self._register(detections[col])
        
        return [d for d in detections if d.track_id is not None]
    
    def _register(self, detection: DetectedObject):
        """注册新对象"""
        detection.track_id = self.next_id
        self.objects[self.next_id] = detection.center
        self.disappeared[self.next_id] = 0
        self.next_id += 1
    
    def _deregister(self, obj_id: int):
        """注销对象"""
        del self.objects[obj_id]
        del self.disappeared[obj_id]