Exposes a shlib interface for media/audio path.

chromecast/public/cast_media_shlib.h

 // Copyright 2015 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_PUBLIC_CAST_MEDIA_SHLIB_H_
 #define CHROMECAST_PUBLIC_CAST_MEDIA_SHLIB_H_
 
 #include <string>
 #include <vector>
 
 #include "chromecast_export.h"
 
 namespace chromecast {
 namespace media {
 
+class CastAudioOutputDevice;
 class VideoPlane;
 
 // Provides access to platform-specific media systems and hardware resources.
 // In cast_shell, all usage is from the browser process.  An implementation is
 // assumed to be in an uninitialized state initially.  When uninitialized, no
 // API calls will be made except for Initialize, which brings the implementation
 // into an initialized state.  A call to Finalize returns the implementation to
 // its uninitialized state.  The implementation must support multiple
 // transitions between these states, to support resource grant/revoke events and
 // also to allow multiple unit tests to bring up the media systems in isolation
 // from other tests.
 class CHROMECAST_EXPORT CastMediaShlib {
  public:
   // Initializes platform-specific media systems.  Only called when in an
   // uninitialized state.
   static void Initialize(const std::vector<std::string>& argv);
 
   // Tears down platform-specific media systems and returns to the uninitialized
   // state.  The implementation must release all media-related hardware
   // resources.
   static void Finalize();
 
   // Gets the VideoPlane instance for managing the hardware video plane.
   // While an implementation is in an initialized state, this function may be
   // called at any time.  The VideoPlane object must be destroyed in Finalize.
   static VideoPlane* GetVideoPlane();
+
+  // Gets the CastAudioOutputDevice instance, which will be used to provide
+  // CastAudioOutputStreams. The returned instance is owned by this class, and
+  // may be destroyed in Finalize().
+  static CastAudioOutputDevice* GetAudioOutputDevice();
 };
 
 }  // namespace media
 }  // namespace chromecast
 
 #endif  // CHROMECAST_PUBLIC_CAST_MEDIA_SHLIB_H_