CmaMediaPipelineClient to watch media pipeline status

chromecast/browser/media/cma_media_pipeline_client.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_BROWSER_MEDIA_CMA_MEDIA_PIPELINE_CLIENT_H_
+#define CHROMECAST_BROWSER_MEDIA_CMA_MEDIA_PIPELINE_CLIENT_H_
+
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "chromecast/base/cast_resource.h"
+#include "chromecast/public/media/media_pipeline_backend.h"
+
+namespace chromecast {
+namespace media {
+
+// Class to provide media backend and watch media pipeline status
+class CmaMediaPipelineClient : public base::RefCounted<CmaMediaPipelineClient>,
+                               public CastResource {
+ public:
+  CmaMediaPipelineClient();
+
+  virtual scoped_ptr<MediaPipelineBackend> CreateMediaPipelineBackend(
+      const media::MediaPipelineDeviceParams& params);
+
+  virtual void OnMediaPipelineBackendCreated();
+  virtual void OnMediaPipelineBackendDestroyed();
+
+  // CastResource implementations
+  void ReleaseResource(CastResource::Resource resource) override;
+  void SetCastResourceClient(CastResource::Client* client) override;
+
+ protected:
+  ~CmaMediaPipelineClient() override;
+
+  CastResource::Client* client_;
+
+ private:
+  friend class base::RefCounted<CmaMediaPipelineClient>;
+  DISALLOW_COPY_AND_ASSIGN(CmaMediaPipelineClient);
+};
+}
+}
+
+#endif