Load CMA backend from shared library

chromecast/media/cma/pipeline/frame_status_cb_impl.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_MEDIA_CMA_PIPELINE_FRAME_STATUS_CB_IMPL_H_
+#define CHROMECAST_MEDIA_CMA_PIPELINE_FRAME_STATUS_CB_IMPL_H_
+
+#include "base/callback.h"
+#include "base/memory/ref_counted.h"
+#include "chromecast/public/media/media_component_device.h"
+
+namespace base {
+class SingleThreadTaskRunner;
+}
+
+namespace chromecast {
+namespace media {
+
+// Helper for implementing MediaComponentDevice::FrameStatusCB with
+// a base::Callback.
+class FrameStatusCBImpl : public MediaComponentDevice::FrameStatusCB {
+ public:
+  typedef base::Callback<void(MediaComponentDevice::FrameStatus)> CallbackType;
+
+  FrameStatusCBImpl(const CallbackType& cb);
+  ~FrameStatusCBImpl() override;
+
+  void Run(MediaComponentDevice::FrameStatus status) override;
+
+ private:
+  CallbackType cb_;
+  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
+};
+
+}  // namespace media
+}  // namespace chromecast
+
+#endif  // CHROMECAST_MEDIA_CMA_PIPELINE_FRAME_STATUS_CB_IMPL_H_