1

include/rtsp_manager.hpp

@@ -45,4 +45,9 @@ private:
     // 信号处理函数
     static void on_media_created(GstRTSPMediaFactory *factory, GstRTSPMedia *media, gpointer user_data);
     static void on_media_unprepared(GstRTSPMedia *media, gpointer user_data);
+
+    // === 新增：同步停止用 ===
+    static std::mutex stop_mutex;
+    static std::condition_variable stop_cv;
+    static std::unordered_map<std::string, int> stopping_count;
 };

src/rtsp_manager.cpp

@@ -29,19 +29,6 @@ GstRTSPMediaFactory *RTSPManager::create_media_factory(const Camera &cam)
     int out_width = cam.width;
     int out_height = cam.height;
 
-    // 构建 pipeline
-    // std::string launch_str =
-    //     "( v4l2src device=" + cam.device +
-    //     " ! video/x-raw,format=NV12,width=" + std::to_string(out_width) +
-    //     ",height=" + std::to_string(out_height) +
-    //     ",framerate=" + std::to_string(cam.fps) + "/1"
-    //                                               " ! queue max-size-buffers=1 leaky=downstream" // 最小队列
-    //                                               " ! mpph264enc bps=" +
-    //     std::to_string(cam.bitrate) +
-    //     " gop=" + std::to_string(cam.fps) + // GOP 设置为 1 秒
-    //     " ! h264parse"
-    //     " ! rtph264pay name=pay0 pt=96 config-interval=1 )"; // 每秒发送 SPS/PPS
-
     std::string launch_str =
         "( v4l2src device=" + cam.device +
         " ! video/x-raw,format=NV12,width=" + std::to_string(out_width) +
@@ -129,6 +116,14 @@ void RTSPManager::on_media_unprepared(GstRTSPMedia *media, gpointer user_data)
             }
         }
     }
+
+    // === ★ 新增：减计数并在最后一个时唤醒等待线程 ===
+    {
+        std::lock_guard<std::mutex> lk(stop_mutex);
+        if (--stopping_count[cam_name] == 0)
+            stop_cv.notify_all();
+    }
+
     g_object_unref(media); // 释放引用
 }
 
@@ -190,6 +185,13 @@ gboolean RTSPManager::unmount_camera_in_main(gpointer data)
         auto it = media_map.find(cam_name);
         if (it != media_map.end())
         {
+
+            // === ★ 新增：记录需要等待的 media 数量 ===
+            {
+                std::lock_guard<std::mutex> lk(stop_mutex);
+                stopping_count[cam_name] = it->second.size();
+            }
+
             for (GstRTSPMedia *media : it->second)
             {
                 GstElement *pipeline = gst_rtsp_media_get_element(media);
@@ -199,11 +201,9 @@ gboolean RTSPManager::unmount_camera_in_main(gpointer data)
                     gst_object_unref(pipeline);
                 }
 
+                // 这一步会触发 on_media_unprepared 信号
                 gst_rtsp_media_unprepare(media);
             }
-
-            it->second.clear();
-            media_map.erase(it);
         }
     }
 
@@ -236,8 +236,16 @@ gboolean RTSPManager::unmount_camera_in_main(gpointer data)
 void RTSPManager::mount_camera(const Camera &cam)
 {
     Camera *camCopy = new Camera(cam);
+
     g_main_context_invoke(main_context, [](gpointer data) -> gboolean
                           { return RTSPManager::mount_camera_in_main(data); }, camCopy);
+
+    // === ★ 新增：等待 on_media_unprepared 全部完成 ===
+    std::unique_lock<std::mutex> lk(stop_mutex);
+    stop_cv.wait(lk, [&]
+                 {
+        auto it = stopping_count.find(cam.name);
+        return it == stopping_count.end() || it->second == 0; });
 }
 
 void RTSPManager::unmount_camera(const Camera &cam)