[Chromecast] Add CmaMediaRendererFactory and IPC proxy components

chromecast/common/media/shared_memory_chunk.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_COMMON_MEDIA_SHARED_MEMORY_CHUNK_H_
+#define CHROMECAST_COMMON_MEDIA_SHARED_MEMORY_CHUNK_H_
+
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "chromecast/media/cma/ipc/media_memory_chunk.h"
+
+namespace base {
+class SharedMemory;
+}
+
+namespace chromecast {
+namespace media {
+
+class SharedMemoryChunk : public MediaMemoryChunk {
+ public:
+  SharedMemoryChunk(scoped_ptr<base::SharedMemory> shared_mem,
+                    size_t size);
+  ~SharedMemoryChunk() override;
+
+  // MediaMemoryChunk implementation.
+  void* data() const override;
+  size_t size() const override;
+  bool valid() const override;
+
+ private:
+  scoped_ptr<base::SharedMemory> shared_mem_;
+  size_t size_;
+
+  DISALLOW_COPY_AND_ASSIGN(SharedMemoryChunk);
+};
+
+}  // namespace media
+}  // namespace chromecast
+
+#endif  // CHROMECAST_COMMON_MEDIA_SHARED_MEMORY_CHUNK_H_