Load CMA backend from shared library

chromecast/media/cma/base/cast_decoder_buffer_impl.h

Index: chromecast/media/cma/base/cast_decoder_buffer_impl.h
diff --git a/chromecast/media/cma/base/cast_decoder_buffer_impl.h b/chromecast/media/cma/base/cast_decoder_buffer_impl.h
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index 0000000000000000000000000000000000000000..444ccf430837695b4820364b0a69853767954e8c
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+++ b/chromecast/media/cma/base/cast_decoder_buffer_impl.h
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+// 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_BASE_CAST_DECODER_BUFFER_IMPL_H_
+#define CHROMECAST_MEDIA_CMA_BASE_CAST_DECODER_BUFFER_IMPL_H_
+
+#include "chromecast/public/media/cast_decoder_buffer.h"
+#include "chromecast/media/cma/base/decoder_buffer_base.h"
+
+namespace chromecast {
+namespace media {
+
+// Implementation of public DecoderBuffer interface.
+// Holds a (refcounted) DecoderBufferBase.  This way, ownership throughout
+// the pipeline is refcounted, but without exposing RefCountedBase in
+// the public API.
+class CastDecoderBufferImpl : public CastDecoderBuffer {
+ public:
+  CastDecoderBufferImpl(const scoped_refptr<DecoderBufferBase>& buffer);
+  ~CastDecoderBufferImpl() override;
+
+  // Returns the stream id of this decoder buffer belonging to. it's optional
+  // and default value is kPrimary.
+  StreamId stream_id() const override;
+
+  // Returns the PTS of the frame in microseconds.
+  int64_t timestamp() const override;
+
+  // Gets the frame data.
+  const uint8* data() const override;
+
+  // Returns the size of the frame in bytes.
+  size_t data_size() const override;
+
+  // Returns the decrypt configuration.
+  // Returns NULL if the buffer has no decrypt info.
+  const CastDecryptConfig* decrypt_config() const override;
+
+  // Indicate if this is a special frame that indicates the end of the stream.
+  // If true, functions to access the frame content cannot be called.
+  bool end_of_stream() const override;
+
+  const scoped_refptr<DecoderBufferBase>& buffer() const;
+
+ private:
+  scoped_refptr<DecoderBufferBase> buffer_;
+};
+
+}  // namespace media
+}  // namespace chromecast
+
+#endif  // CHROMECAST_MEDIA_CMA_BASE_CAST_DECODER_BUFFER_BASE_H_