Adding basic implementation of AudioNetworkAdaptor.

webrtc/modules/audio_coding/audio_network_adaptor/controller_manager.h

+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef WEBRTC_MODULES_AUDIO_CODING_AUDIO_NETWORK_ADAPTOR_CONTROLLER_MANAGER_H_
+#define WEBRTC_MODULES_AUDIO_CODING_AUDIO_NETWORK_ADAPTOR_CONTROLLER_MANAGER_H_
+
+#include <memory>
+#include <vector>
+
+#include "webrtc/base/constructormagic.h"
+#include "webrtc/modules/audio_coding/audio_network_adaptor/controller.h"
+
+namespace webrtc {
+
+class ControllerManager {
+ public:
+  virtual ~ControllerManager() = default;
+
+  // Sort controllers based on their significance.
+  virtual std::vector<Controller*> GetSortedControllers(
+      const Controller::NetworkMetrics& metrics) = 0;
+
+  virtual std::vector<Controller*> GetControllers() const = 0;
+};
+
+class ControllerManagerImpl final : public ControllerManager {
+ public:
+  struct Config {
+    Config();
+    ~Config();
+  };
+
+  explicit ControllerManagerImpl(const Config& config);
+
+  // Dependency injection for testing.
+  ControllerManagerImpl(const Config& config,
+                        std::vector<std::unique_ptr<Controller>> controllers);
+
+  ~ControllerManagerImpl() override;
+
+  // Sort controllers based on their significance.
+  std::vector<Controller*> GetSortedControllers(
+      const Controller::NetworkMetrics& metrics) override;
+
+  std::vector<Controller*> GetControllers() const override;
+
+ private:
+  const Config config_;
+
+  std::vector<std::unique_ptr<Controller>> controllers_;
+
+  std::vector<Controller*> default_sorted_controllers_;
+
+  RTC_DISALLOW_COPY_AND_ASSIGN(ControllerManagerImpl);
+};
+
+}  // namespace webrtc
+
+#endif  // WEBRTC_MODULES_AUDIO_CODING_AUDIO_NETWORK_ADAPTOR_CONTROLLER_MANAGER_H_