[Chromecast] Complete PostProcessingPipeline changes

chromecast/media/cma/backend/alsa/post_processing_pipeline_impl.h

 // Copyright 2017 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 CHROMECAST_MEDIA_CMA_BACKEND_ALSA_POST_PROCESSING_PIPELINE_H_
-#define CHROMECAST_MEDIA_CMA_BACKEND_ALSA_POST_PROCESSING_PIPELINE_H_
+#ifndef CHROMECAST_MEDIA_CMA_BACKEND_ALSA_POST_PROCESSING_PIPELINE_IMPL_H_
+#define CHROMECAST_MEDIA_CMA_BACKEND_ALSA_POST_PROCESSING_PIPELINE_IMPL_H_
 
-#include <cstdint>
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
+#include "chromecast/media/cma/backend/alsa/post_processing_pipeline.h"
 
 namespace base {
 class ListValue;
 class ScopedNativeLibrary;
 }  // namespace base
 
 namespace chromecast {
 namespace media {
 
 class AudioPostProcessor;
 
 // Creates and contains multiple AudioPostProcessors, as specified in ctor.
 // Provides convenience methods to access and use the AudioPostProcessors.
-class PostProcessingPipeline {
+class PostProcessingPipelineImpl : public PostProcessingPipeline {
  public:
-  PostProcessingPipeline(const base::ListValue* filter_description_list,
-                         int channels);
-  ~PostProcessingPipeline();
+  PostProcessingPipelineImpl(const std::string& name,
+                             const base::ListValue* filter_description_list,
+                             int channels);
+  ~PostProcessingPipelineImpl() override;
 
   int ProcessFrames(const std::vector<float*>& data,
                     int num_frames,
                     float current_volume,
-                    bool is_silence);
-  bool SetSampleRate(int sample_rate);
-  bool IsRinging();
+                    bool is_silence) override;
+
+  bool SetSampleRate(int sample_rate) override;
+  bool IsRinging() override;
 
  private:
   int GetRingingTimeInFrames();
+  void UpdateCastVolume(float multiplier);
 
+  std::string name_;
   int sample_rate_;
   int ringing_time_in_frames_ = 0;
   int silence_frames_processed_ = 0;
   int total_delay_frames_ = 0;
+  float current_multiplier_;
+  float cast_volume_;
 
   // Contains all libraries in use;
   // Functions in shared objects cannot be used once library is closed.
   std::vector<std::unique_ptr<base::ScopedNativeLibrary>> libraries_;
 
   // Must be after libraries_
   std::vector<std::unique_ptr<AudioPostProcessor>> processors_;
 
-  DISALLOW_COPY_AND_ASSIGN(PostProcessingPipeline);
+  DISALLOW_COPY_AND_ASSIGN(PostProcessingPipelineImpl);
 };
 
 }  // namespace media
 }  // namespace chromecast
 
-#endif  // CHROMECAST_MEDIA_CMA_BACKEND_ALSA_POST_PROCESSING_PIPELINE_H_
+#endif  // CHROMECAST_MEDIA_CMA_BACKEND_ALSA_POST_PROCESSING_PIPELINE_IMPL_H_