新的opus封装以及优化const会导致的内存拷贝

main/background_task.cc

@@ -31,12 +31,16 @@ void BackgroundTask::Schedule(std::function<void()> callback) {
         ESP_LOGW(TAG, "active_tasks_ == %u", active_tasks_.load());
     }
     active_tasks_++;
-    auto wrapped_callback = [this, callback]() {
-        callback();
-        active_tasks_--;
-        condition_variable_.notify_all();
-    };
-    main_tasks_.push_back(wrapped_callback);
+    main_tasks_.emplace_back([this, cb = std::move(callback)]() {
+        cb();
+        {
+            std::lock_guard<std::mutex> lock(mutex_);
+            active_tasks_--;
+            if (main_tasks_.empty() && active_tasks_ == 0) {
+                condition_variable_.notify_all();
+            }
+        }
+    });
     condition_variable_.notify_all();
 }