[Chromecast] Move CastAudioDecoder out to chromecast/media/cma/decoder

chromecast/media/cma/base/decoder_buffer_base.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_BASE_H_
-#define CHROMECAST_MEDIA_CMA_BASE_DECODER_BUFFER_BASE_H_
-
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/time/time.h"
-#include "chromecast/public/media/cast_decoder_buffer.h"
-#include "chromecast/public/media/decrypt_context.h"
-
-namespace media {
-class DecoderBuffer;
-}
-
-namespace chromecast {
-namespace media {
-
-// DecoderBufferBase exposes only the properties of an audio/video buffer.
-// The way a DecoderBufferBase is created and organized in memory
-// is left as a detail of the implementation of derived classes.
-class DecoderBufferBase : public CastDecoderBuffer,
-                          public base::RefCountedThreadSafe<DecoderBufferBase> {
- public:
-  // Partial CastDecoderBuffer implementation:
-  DecryptContext* decrypt_context() const override;
-
-  void set_decrypt_context(scoped_ptr<DecryptContext> context) {
-    decrypt_context_ = context.Pass();
-  }
-
-  // Sets the PTS of the frame.
-  virtual void set_timestamp(base::TimeDelta timestamp) = 0;
-
-  // Gets a pointer to the frame data buffer.
-  virtual uint8_t* writable_data() const = 0;
-
-  virtual scoped_refptr<::media::DecoderBuffer> ToMediaBuffer() const = 0;
-
- protected:
-  friend class base::RefCountedThreadSafe<DecoderBufferBase>;
-
-  DecoderBufferBase();
-  ~DecoderBufferBase() override;
-
- private:
-  scoped_ptr<DecryptContext> decrypt_context_;
-
-  DISALLOW_COPY_AND_ASSIGN(DecoderBufferBase);
-};
-
-inline DecoderBufferBase::DecoderBufferBase() {
-}
-
-inline DecoderBufferBase::~DecoderBufferBase() {
-}
-
-inline DecryptContext* DecoderBufferBase::decrypt_context() const {
-  return decrypt_context_.get();
-}
-
-}  // namespace media
-}  // namespace chromecast
-
-#endif  // CHROMECAST_MEDIA_CMA_BASE_DECODER_BUFFER_BASE_H_