first commit

include/mqtt_client_wrapper.hpp

@@ -4,6 +4,7 @@
 #include "app_config.hpp"
 #include "logger.hpp"
 #include "mqtt_client.hpp"
+#include "rtsp_manager.hpp"
 #include <memory>
 #include <atomic>
 

include/rtsp_manager.hpp

@@ -13,9 +13,19 @@ public:
     static void start(const std::vector<Camera> &cameras);
     static void stop();
 
+    // === 新增方法：按需挂载/卸载摄像头 ===
+    static void mount_camera(const Camera &cam);
+    static void unmount_camera(const Camera &cam);
+
+    // === 新增方法：查询播放状态 ===
+    static bool is_streaming(const std::string &cam_name);
+
 private:
     static GMainLoop *loop;
     static GstRTSPServer *server;
 
+    // === 新增：维护每个摄像头的播放状态 ===
+    static std::unordered_map<std::string, bool> streaming_status;
+
     static GstRTSPMediaFactory *create_media_factory(const Camera &cam);
 };

src/mqtt_client_wrapper.cpp

@@ -28,6 +28,68 @@ static void on_mqtt_message_received(const std::string &topic, const std::string
 
     try
     {
+        if (topic == g_app_config.mqtt.topics.video_down)
+        {
+            // 处理 video_down
+            auto j = nlohmann::json::parse(message);
+
+            if (!j.contains("data") || !j["data"].contains("status"))
+            {
+                LOG_WARN("[MQTT] video_down JSON missing data.status");
+                return;
+            }
+
+            int status = j["data"]["status"].get<int>();
+
+            if (status == 1)
+            {
+                // 启动推流：挂载本地配置中 enabled 的摄像头
+                for (const auto &cam : g_app_config.cameras)
+                {
+                    if (!cam.enabled)
+                        continue;
+
+                    if (!RTSPManager::is_streaming(cam.name))
+                    {
+                        RTSPManager::mount_camera(cam);
+                        LOG_INFO("[MQTT] Started streaming: " + cam.name);
+                    }
+                }
+            }
+            else if (status == 0)
+            {
+                // 停止推流：卸载本地配置中 enabled 的摄像头
+                for (const auto &cam : g_app_config.cameras)
+                {
+                    if (!cam.enabled)
+                        continue;
+
+                    if (RTSPManager::is_streaming(cam.name))
+                    {
+                        RTSPManager::unmount_camera(cam);
+                        LOG_INFO("[MQTT] Stopped streaming: " + cam.name);
+                    }
+                }
+            }
+            else
+            {
+                LOG_WARN("[MQTT] video_down: unknown status value " + std::to_string(status));
+            }
+        }
+        else if (topic == g_app_config.mqtt.topics.substream_down)
+        {
+            // 处理 substream_down
+            LOG_INFO("[MQTT] substream_down message received (not implemented yet).");
+        }
+        else if (topic == g_app_config.mqtt.topics.reset_down)
+        {
+            // 处理 reset_down
+            LOG_INFO("[MQTT] reset_down message received (not implemented yet).");
+        }
+        else
+        {
+            LOG_WARN("[MQTT] Unknown topic: " + topic);
+        }
     }
     catch (const std::exception &e)
     {

src/rtsp_manager.cpp

@@ -3,8 +3,10 @@
 #include "logger.hpp"
 #include <iostream>
 
+// 静态变量定义
 GMainLoop *RTSPManager::loop = nullptr;
 GstRTSPServer *RTSPManager::server = nullptr;
+std::unordered_map<std::string, bool> RTSPManager::streaming_status; // 播放状态表
 
 void RTSPManager::init()
 {
@@ -33,21 +35,7 @@ void RTSPManager::start(const std::vector<Camera> &cameras)
     server = gst_rtsp_server_new();
     gst_rtsp_server_set_service(server, "8554");
 
-    GstRTSPMountPoints *mounts = gst_rtsp_server_get_mount_points(server);
+    // === 不再在启动时挂载摄像头，由调度指令控制推流 ===
-
-    for (auto &cam : cameras)
-    {
-        if (!cam.enabled)
-            continue;
-
-        auto factory = create_media_factory(cam);
-        std::string mount_point = "/" + cam.name;
-        gst_rtsp_mount_points_add_factory(mounts, mount_point.c_str(), factory);
-
-        LOG_INFO("[RTSP] Camera '" + cam.name + "' available at rtsp://localhost:8554" + mount_point);
-    }
-
-    g_object_unref(mounts);
 
     loop = g_main_loop_new(nullptr, FALSE);
     gst_rtsp_server_attach(server, nullptr);
@@ -69,6 +57,45 @@ void RTSPManager::start(const std::vector<Camera> &cameras)
     LOG_INFO("[RTSP] Server stopped.");
 }
 
+// === 新增方法：挂载摄像头 ===
+void RTSPManager::mount_camera(const Camera &cam)
+{
+    if (!server)
+        return;
+
+    GstRTSPMountPoints *mounts = gst_rtsp_server_get_mount_points(server);
+    auto factory = create_media_factory(cam);
+    std::string mount_point = "/" + cam.name;
+    gst_rtsp_mount_points_add_factory(mounts, mount_point.c_str(), factory);
+    g_object_unref(mounts);
+
+    streaming_status[cam.name] = true; // === 更新播放状态 ===
+    LOG_INFO("[RTSP] Camera '" + cam.name + "' mounted at rtsp://localhost:8554" + mount_point);
+}
+
+// === 新增方法：卸载摄像头 ===
+void RTSPManager::unmount_camera(const Camera &cam)
+{
+    if (!server)
+        return;
+
+    GstRTSPMountPoints *mounts = gst_rtsp_server_get_mount_points(server);
+    std::string mount_point = "/" + cam.name;
+    gst_rtsp_mount_points_remove_factory(mounts, mount_point.c_str());
+    g_object_unref(mounts);
+
+    streaming_status[cam.name] = false; // === 更新播放状态 ===
+    LOG_INFO("[RTSP] Camera '" + cam.name + "' unmounted.");
+}
+
+bool RTSPManager::is_streaming(const std::string &cam_name)
+{
+    auto it = streaming_status.find(cam_name);
+    if (it != streaming_status.end())
+        return it->second;
+    return false; // 默认未推流
+}
+
 void RTSPManager::stop()
 {
     if (loop)