Refactor PipelineImpl to use CompositeFilter to manage Filter state transitions.

media/base/mock_filters.h

 // Copyright (c) 2010 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.
 //
 // A new breed of mock media filters, this time using gmock!  Feel free to add
 // actions if you need interesting side-effects (i.e., copying data to the
 // buffer passed into MockDataSource::Read()).
 //
 // Don't forget you can use StrictMock<> and NiceMock<> if you want the mock
 // filters to fail the test or do nothing when an unexpected method is called.
@@ skipping 72 matching lines @@
 
    private:
     MockFilterCallback* mock_callback_;
 
     DISALLOW_COPY_AND_ASSIGN(CallbackImpl);
   };
 
   DISALLOW_COPY_AND_ASSIGN(MockFilterCallback);
 };
 
+class MockFilter : public Filter {
+ public:
+  MockFilter();
+
+  void set_requires_message_loop(bool requires_message_loop);

[scherkus (not reviewing), 2010/12/15 16:44:02]

looks like these are always called after creation.. perhaps make ctor arguments
instead?

[acolwell GONE FROM CHROMIUM, 2010/12/15 18:20:11]

Done.

+  void set_message_loop_name(const char* name);
+
+  // Filter implementation.
+  virtual bool requires_message_loop() const;
+  virtual const char* message_loop_name() const;
+
+  MOCK_METHOD1(Play, void(FilterCallback* callback));
+  MOCK_METHOD1(Pause, void(FilterCallback* callback));
+  MOCK_METHOD1(Flush, void(FilterCallback* callback));
+  MOCK_METHOD1(Stop, void(FilterCallback* callback));
+  MOCK_METHOD1(SetPlaybackRate, void(float playback_rate));
+  MOCK_METHOD2(Seek, void(base::TimeDelta time, FilterCallback* callback));
+  MOCK_METHOD0(OnAudioRendererDisabled, void());
+
+ protected:
+  virtual ~MockFilter();
+
+ private:
+  bool requires_message_loop_;
+  std::string message_loop_name_;
+
+  DISALLOW_COPY_AND_ASSIGN(MockFilter);
+};
+
 class MockDataSource : public DataSource {
  public:
   MockDataSource() {}
 
   // Filter implementation.
   MOCK_METHOD1(Stop, void(FilterCallback* callback));
   MOCK_METHOD1(SetPlaybackRate, void(float playback_rate));
   MOCK_METHOD2(Seek, void(base::TimeDelta time, FilterCallback* callback));
   MOCK_METHOD0(OnAudioRendererDisabled, void());
 
@@ skipping 251 matching lines @@
 
 // Helper gmock action that calls DisableAudioRenderer() on behalf of the
 // provided filter.
 ACTION_P(DisableAudioRenderer, filter) {
   filter->host()->DisableAudioRenderer();
 }
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_MOCK_FILTERS_H_