Add the base class for decoder buffers used in cast media.

chromecast/media/cma/base/decoder_buffer_wrapper.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_BASE_DECODER_BUFFER_WRAPPER_H_
+#define CHROMECAST_MEDIA_CMA_BASE_DECODER_BUFFER_WRAPPER_H_
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "chromecast/media/cma/base/decoder_buffer_base.h"
+
+namespace media {
+class DecoderBuffer;
+}
+
+namespace chromecast {
+namespace media {
+
+class DecoderBufferWrapper : public DecoderBufferBase {

[xhwang, 2014/09/03 17:13:49]

Add documentation about what this wrapper actually does. e.g. wraps a
media::DecoderBuffer into DecoderBufferBase...

BTW, this looks more like an Adapter than a Wrapper...

[damienv1, 2014/09/03 21:01:58]

Done.

+ public:
+  explicit DecoderBufferWrapper(
+      const scoped_refptr< ::media::DecoderBuffer>& buffer);
+
+  // DecoderBufferBase implementation.
+  virtual base::TimeDelta timestamp() const OVERRIDE;
+  virtual const uint8* data() const OVERRIDE;
+  virtual uint8* writable_data() const OVERRIDE;
+  virtual int data_size() const OVERRIDE;
+  virtual const ::media::DecryptConfig* decrypt_config() const OVERRIDE;
+  virtual bool end_of_stream() const OVERRIDE;
+
+ private:
+  virtual ~DecoderBufferWrapper();
+
+  scoped_refptr< ::media::DecoderBuffer> const buffer_;
+
+  DISALLOW_COPY_AND_ASSIGN(DecoderBufferWrapper);
+};
+
+}  // namespace media
+}  // namespace chromecast
+
+#endif  // CHROMECAST_MEDIA_CMA_BASE_DECODER_BUFFER_WRAPPER_H_