feat: add behavior event frame model

include/behavior/behavior_event.h

@@ -0,0 +1,42 @@
+#pragma once
+
+#include <cstdint>
+#include <string>
+#include <vector>
+
+#include "frame/rect.h"
+
+namespace rk3588 {
+
+enum class BehaviorEventType {
+    Intrusion,
+    Climb,
+    Fall,
+    Fight
+};
+
+enum class BehaviorEventStatus {
+    Pending,
+    Active,
+    Ended
+};
+
+struct BehaviorEventItem {
+    int event_id = -1;
+    BehaviorEventType type = BehaviorEventType::Intrusion;
+    BehaviorEventStatus status = BehaviorEventStatus::Pending;
+    float score = 0.0f;
+    Rect bbox{};
+    std::vector<int> track_ids;
+    uint64_t start_pts = 0;
+    uint64_t last_pts = 0;
+    uint64_t duration_ms = 0;
+    std::string source;
+    std::string region_id;
+};
+
+struct BehaviorEventResult {
+    std::vector<BehaviorEventItem> items;
+};
+
+}  // namespace rk3588

include/frame/frame.h

@@ -8,7 +8,9 @@
 #include <string>
 #include <vector>
 
+#include "behavior/behavior_event.h"
 #include "hw/frame_buffer.h"
+#include "frame/rect.h"
 
 namespace rk3588 {
 
@@ -23,13 +25,6 @@ enum class PixelFormat {
     UNKNOWN
 };
 
-struct Rect {
-    float x = 0.0f;
-    float y = 0.0f;
-    float w = 0.0f;
-    float h = 0.0f;
-};
-
 struct Detection {
     int cls_id = -1;
     float score = 0.0f;
@@ -86,6 +81,7 @@ struct Frame {
     std::shared_ptr<FrameBuffer> buffer;
 
     std::shared_ptr<DetectionResult> det;
+    std::shared_ptr<BehaviorEventResult> behavior_events;
     // Face recognition pipeline meta (kept separate from user_meta to avoid conflicts with publish).
     std::shared_ptr<FaceDetResult> face_det;
     std::shared_ptr<FaceRecogResult> face_recog;

include/frame/rect.h

@@ -0,0 +1,12 @@
+#pragma once
+
+namespace rk3588 {
+
+struct Rect {
+    float x = 0.0f;
+    float y = 0.0f;
+    float w = 0.0f;
+    float h = 0.0f;
+};
+
+}  // namespace rk3588

tests/CMakeLists.txt

@@ -37,6 +37,7 @@ add_executable(rk3588_gtests
     test_config_expand.cpp
     test_hw_factory.cpp
     test_frame_buffer.cpp
+    test_behavior_event_model.cpp
     test_infer_backend.cpp
     test_image_processor.cpp
     test_codec_backend.cpp

tests/test_behavior_event_model.cpp

@@ -0,0 +1,33 @@
+#include <gtest/gtest.h>
+
+#include <memory>
+
+#include "frame/frame.h"
+
+namespace rk3588 {
+namespace {
+
+TEST(BehaviorEventModelTest, FrameStoresBehaviorEventsSeparatelyFromDetections) {
+    auto frame = std::make_shared<Frame>();
+    frame->det = std::make_shared<DetectionResult>();
+    frame->behavior_events = std::make_shared<BehaviorEventResult>();
+
+    BehaviorEventItem item;
+    item.event_id = 7;
+    item.type = BehaviorEventType::Fall;
+    item.status = BehaviorEventStatus::Active;
+    item.track_ids = {42};
+    item.duration_ms = 1600;
+
+    frame->behavior_events->items.push_back(item);
+
+    ASSERT_NE(frame->det, nullptr);
+    ASSERT_NE(frame->behavior_events, nullptr);
+    ASSERT_EQ(frame->behavior_events->items.size(), 1u);
+    ASSERT_EQ(frame->behavior_events->items[0].track_ids.size(), 1u);
+    EXPECT_EQ(frame->behavior_events->items[0].track_ids[0], 42);
+    EXPECT_EQ(frame->behavior_events->items[0].duration_ms, 1600u);
+}
+
+}  // namespace
+}  // namespace rk3588