Load CMA backend from shared library

chromecast/browser/media/cma_message_filter_host.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 CHROMECAST_BROWSER_MEDIA_CMA_MESSAGE_FILTER_HOST_H_
 #define CHROMECAST_BROWSER_MEDIA_CMA_MESSAGE_FILTER_HOST_H_
 
 #include <map>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/shared_memory.h"
 #include "base/memory/weak_ptr.h"
 #include "chromecast/common/media/cma_ipc_common.h"
-#include "chromecast/media/cma/backend/media_pipeline_device.h"
 #include "chromecast/media/cma/pipeline/load_type.h"
 #include "content/public/browser/browser_message_filter.h"
 #include "content/public/browser/browser_thread.h"
 #include "media/base/buffering_state.h"
 #include "media/base/pipeline_status.h"
 
 namespace base {
 class CancelableSyncSocket;
 class SingleThreadTaskRunner;
 }
 
 namespace gfx {
 class PointF;
 class Size;
 }
 
 namespace media {
 class AudioDecoderConfig;
 class BrowserCdm;
 class VideoDecoderConfig;
 }
 
 namespace chromecast {
 namespace media {
 
+class MediaPipelineBackend;
+struct MediaPipelineDeviceParams;
 class MediaPipelineHost;
 
 class CmaMessageFilterHost
     : public content::BrowserMessageFilter {
  public:
+  // Factory method to create a MediaPipelineBackend
+  typedef base::Callback<scoped_ptr<MediaPipelineBackend>(
+      const MediaPipelineDeviceParams&)> CreateDeviceComponentsCB;
+
   CmaMessageFilterHost(
       int render_process_id,
-      const media::CreatePipelineDeviceCB& create_pipeline_device_cb);
+      const CreateDeviceComponentsCB& create_device_components_cb);
 
   // content::BrowserMessageFilter implementation.
   void OnChannelClosing() override;
   void OnDestruct() const override;
   bool OnMessageReceived(const IPC::Message& message) override;
 
  private:
   typedef std::map<int, MediaPipelineHost*> MediaPipelineMap;
 
   friend class content::BrowserThread;
@@ skipping 48 matching lines @@
                            TrackId track_id,
                            const ::media::PipelineStatistics& stats);
   void OnNaturalSizeChanged(int media_id,
                             TrackId track_id,
                             const gfx::Size& size);
 
   // Render process ID correponding to this message filter.
   const int process_id_;
 
   // Factory function for device-specific part of media pipeline creation
-  media::CreatePipelineDeviceCB create_pipeline_device_cb_;
+  CreateDeviceComponentsCB create_device_components_cb_;
 
   // List of media pipeline and message loop media pipelines are running on.
   MediaPipelineMap media_pipelines_;
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
 
   base::WeakPtr<CmaMessageFilterHost> weak_this_;
   base::WeakPtrFactory<CmaMessageFilterHost> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CmaMessageFilterHost);
 };
 
 }  // namespace media
 }  // namespace chromecast
 
 #endif  // CHROMECAST_BROWSER_MEDIA_CMA_MESSAGE_FILTER_HOST_H_