Replace the guts of AudioRendererBase with calls to scaling algorithm.

media/base/mock_filters.h

 // Copyright (c) 2009 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.
 // http://code.google.com/p/googlemock/wiki/CookBook#Nice_Mocks_and_Strict_Mocks
 
 #ifndef MEDIA_BASE_MOCK_FILTERS_H_
 #define MEDIA_BASE_MOCK_FILTERS_H_
 
+#include <string>
+
 #include "media/base/factory.h"
 #include "media/base/filters.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
 namespace media {
 
 // Use this template to test for object destruction by setting expectations on
 // the method OnDestroy().
 //
 // TODO(scherkus): not sure about the naming...  perhaps contribute this back
@@ skipping 32 matching lines @@
   // test.
   FilterCallback* NewCallback() {
     return new CallbackImpl(this);
   }
 
  private:
   // Private implementation of CallbackRunner used to trigger expectations on
   // MockFilterCallback.
   class CallbackImpl : public CallbackRunner<Tuple0> {
    public:
-    CallbackImpl(MockFilterCallback* mock_callback)
+    explicit CallbackImpl(MockFilterCallback* mock_callback)
         : mock_callback_(mock_callback) {
     }
 
     virtual ~CallbackImpl() {
       mock_callback_->OnCallbackDestroyed();
     }
 
     virtual void RunWithParams(const Tuple0& params) {
       mock_callback_->OnFilterCallback();
     }
@@ skipping 108 matching lines @@
  private:
   MediaFormat media_format_;
 
   DISALLOW_COPY_AND_ASSIGN(MockVideoDecoder);
 };
 
 class MockAudioDecoder : public AudioDecoder {
  public:
   MockAudioDecoder() {}
 
+  // Sets the essential media format keys for this decoder.
+  MockAudioDecoder(int channels, int sample_rate, int sample_bits) {
+    media_format_.SetAsString(MediaFormat::kMimeType,
+                              mime_type::kUncompressedAudio);
+    media_format_.SetAsInteger(MediaFormat::kChannels, channels);
+    media_format_.SetAsInteger(MediaFormat::kSampleRate, sample_rate);
+    media_format_.SetAsInteger(MediaFormat::kSampleBits, sample_bits);
+  }
+
   // MediaFilter implementation.
   MOCK_METHOD0(Stop, void());
   MOCK_METHOD1(SetPlaybackRate, void(float playback_rate));
   MOCK_METHOD2(Seek, void(base::TimeDelta time, FilterCallback* callback));
 
   // AudioDecoder implementation.
   MOCK_METHOD2(Initialize, void(DemuxerStream* stream,
                                 FilterCallback* callback));
   const MediaFormat& media_format() { return media_format_; }
   MOCK_METHOD1(Read, void(Callback1<Buffer*>::Type* read_callback));
@@ skipping 143 matching lines @@
 
 // Helper gmock action that calls SetBufferedBytes() on behalf of the provided
 // filter.
 ACTION_P2(SetBufferedBytes, filter, bytes) {
   filter->host()->SetBufferedBytes(bytes);
 }
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_MOCK_FILTERS_H_