Load CMA backend from shared library

chromecast/media/cma/backend/media_pipeline_device_params.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_MEDIA_CMA_BACKEND_MEDIA_PIPELINE_DEVICE_PARAMS_H_
-#define CHROMECAST_MEDIA_CMA_BACKEND_MEDIA_PIPELINE_DEVICE_PARAMS_H_
-
-#include "base/macros.h"
-
-namespace chromecast {
-namespace media {
-
-class MediaPipelineDeviceParams {
- public:
-  enum MediaSyncType {
-    // Default operation, synchronize playback using PTS with higher latency.
-    kModeSyncPts = 0,
-    // With this mode, synchronization is disabled and audio/video frames are
-    // rendered "right away":
-    // - for audio, frames are still rendered based on the sampling frequency
-    // - for video, frames are rendered as soon as available at the output of
-    //   the video decoder.
-    //   The assumption is that no B frames are used when synchronization is
-    //   disabled, otherwise B frames would always be skipped.
-    kModeIgnorePts = 1,
-    // In addition to the constraints above, also do not wait for vsync.
-    kModeIgnorePtsAndVSync = 2,
-  };
-
-  MediaPipelineDeviceParams();
-  ~MediaPipelineDeviceParams();
-
-  MediaSyncType sync_type;
-};
-
-}  // namespace media
-}  // namespace chromecast
-
-#endif  // CHROMECAST_MEDIA_CMA_BACKEND_MEDIA_PIPELINE_DEVICE_PARAMS_H_