Caching AudioOutputDevice instances in mixer manager

media/renderers/default_renderer_factory.h

 // Copyright 2014 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_RENDERERS_DEFAULT_RENDERER_FACTORY_H_
 #define MEDIA_RENDERERS_DEFAULT_RENDERER_FACTORY_H_
 
 #include <memory>
 
 #include "base/callback.h"
@@ skipping 13 matching lines @@
 class VideoDecoder;
 class VideoRendererSink;
 
 // The default factory class for creating RendererImpl.
 class MEDIA_EXPORT DefaultRendererFactory : public RendererFactory {
  public:
   using GetGpuFactoriesCB = base::Callback<GpuVideoAcceleratorFactories*()>;
 
   DefaultRendererFactory(const scoped_refptr<MediaLog>& media_log,
                          DecoderFactory* decoder_factory,
-                         const GetGpuFactoriesCB& get_gpu_factories_cb,
-                         const AudioHardwareConfig& audio_hardware_config);
+                         const GetGpuFactoriesCB& get_gpu_factories_cb);
   ~DefaultRendererFactory() final;
 
   std::unique_ptr<Renderer> CreateRenderer(
       const scoped_refptr<base::SingleThreadTaskRunner>& media_task_runner,
       const scoped_refptr<base::TaskRunner>& worker_task_runner,
       AudioRendererSink* audio_renderer_sink,
       VideoRendererSink* video_renderer_sink,
       const RequestSurfaceCB& request_surface_cb) final;
 
  private:
   ScopedVector<AudioDecoder> CreateAudioDecoders(
       const scoped_refptr<base::SingleThreadTaskRunner>& media_task_runner);
   ScopedVector<VideoDecoder> CreateVideoDecoders(
       const scoped_refptr<base::SingleThreadTaskRunner>& media_task_runner,
       const RequestSurfaceCB& request_surface_cb,
       GpuVideoAcceleratorFactories* gpu_factories);
 
   scoped_refptr<MediaLog> media_log_;
 
   // Factory to create extra audio and video decoders.
   // Could be nullptr if not extra decoders are available.
   DecoderFactory* decoder_factory_;
 
   // Creates factories for supporting video accelerators. May be null.
   GetGpuFactoriesCB get_gpu_factories_cb_;
 
-  const AudioHardwareConfig& audio_hardware_config_;
-
   DISALLOW_COPY_AND_ASSIGN(DefaultRendererFactory);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_RENDERERS_DEFAULT_RENDERER_FACTORY_H_