Small refactor to media architecture in order to allow end-to-end tests.

media/audio/test_audio_input_controller_factory.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_AUDIO_TEST_AUDIO_INPUT_CONTROLLER_FACTORY_H_
 #define MEDIA_AUDIO_TEST_AUDIO_INPUT_CONTROLLER_FACTORY_H_
 #pragma once
 
 #include "base/bind.h"
 #include "media/audio/audio_input_controller.h"
@@ skipping 27 matching lines @@
 //   controller->event_handler()->OnData(...);
 //   controller->event_handler()->OnError(...);
 //
 //   // Make sure consumer of AudioInputController does the right thing.
 //   ...
 //   // Reset factory.
 //   AudioInputController::set_factory_for_testing(NULL);
 
 class TestAudioInputController : public AudioInputController {
  public:
+  class Delegate {
+   public:
+    virtual void TestAudioControllerOpened(
+        TestAudioInputController* controller) = 0;
+    virtual void TestAudioControllerClosed(
+        TestAudioInputController* controller) = 0;
+  };
+
   TestAudioInputController(TestAudioInputControllerFactory* factory,
                            AudioManager* audio_manager,
+                           AudioParameters audio_parameters,
                            EventHandler* event_handler,
                            SyncWriter* sync_writer);
 
   // Returns the event handler installed on the AudioInputController.
   EventHandler* event_handler() const { return event_handler_; }
 
-  // Overriden to do nothing. It is assumed the caller will notify the event
-  // handler with recorded data and other events.
-  virtual void Record() OVERRIDE {}
+  // Returns the AudioParameters passed by the requester upon creation through
+  // AudioManager::Create(...).
+  const AudioParameters& audio_parameters() const { return audio_parameters_; }
+
+  // Notifies the TestAudioControllerOpened() event to the delegate (if any).
+  virtual void Record() OVERRIDE;
 
   // Ensure that the closure is run on the audio-manager thread.
   virtual void Close(const base::Closure& closed_task) OVERRIDE;
 
  protected:
   virtual ~TestAudioInputController();
 
  private:
+  AudioParameters audio_parameters_;
+
   // These are not owned by us and expected to be valid for this object's
   // lifetime.
   TestAudioInputControllerFactory* factory_;
   EventHandler* event_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(TestAudioInputController);
 };
 
+typedef TestAudioInputController::Delegate TestAudioInputControllerDelegate;
+
 // Simple AudioInputController::Factory method that creates
 // TestAudioInputControllers.
 class TestAudioInputControllerFactory : public AudioInputController::Factory {
  public:
   TestAudioInputControllerFactory();
+  virtual ~TestAudioInputControllerFactory();
 
   // AudioInputController::Factory methods.
   virtual AudioInputController* Create(
       AudioManager* audio_manager,
       AudioInputController::EventHandler* event_handler,
       AudioParameters params) OVERRIDE;
 
+  void SetDelegateForTests(TestAudioInputControllerDelegate* delegate);
+
   TestAudioInputController* controller() const { return controller_; }
 
  private:
   friend class TestAudioInputController;
 
   // Invoked by a TestAudioInputController when it gets destroyed.
   void OnTestAudioInputControllerDestroyed(
       TestAudioInputController* controller);
 
   // The caller of Create owns this object.
   TestAudioInputController* controller_;
 
+  // The delegate for tests for receiving audio controller events.
+  TestAudioInputControllerDelegate* delegate_;
+
   DISALLOW_COPY_AND_ASSIGN(TestAudioInputControllerFactory);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_TEST_AUDIO_INPUT_CONTROLLER_FACTORY_H_