Use data pipe to pass DecoderBuffer contents

media/mojo/services/mojo_decryptor_service.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 MEDIA_MOJO_SERVICES_MOJO_DECRYPTOR_SERVICE_H_
 #define MEDIA_MOJO_SERVICES_MOJO_DECRYPTOR_SERVICE_H_
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "media/base/decryptor.h"
 #include "media/mojo/interfaces/decryptor.mojom.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "mojo/public/cpp/bindings/callback.h"
+#include "mojo/public/cpp/system/data_pipe.h"
 
 namespace media {
 
 class DecoderBuffer;
 class MediaKeys;
 
 // A interfaces::Decryptor implementation. This object is owned by the creator,
 // and uses a weak binding across the mojo interface.
 class MojoDecryptorService : public interfaces::Decryptor {
  public:
   // Constructs a MojoDecryptorService and binds it to the |request|. Keeps a
   // copy of |cdm| to prevent it from being deleted as long as it is needed.
   // |error_handler| will be called if a connection error occurs.
   MojoDecryptorService(const scoped_refptr<MediaKeys>& cdm,
                        mojo::InterfaceRequest<interfaces::Decryptor> request,
                        const mojo::Closure& error_handler);
 
   ~MojoDecryptorService() final;
 
   // interfaces::Decryptor implementation.
+  void Initialize(mojo::ScopedDataPipeConsumerHandle receive_pipe,
+                  mojo::ScopedDataPipeProducerHandle transmit_pipe) final;
   void Decrypt(interfaces::DemuxerStream::Type stream_type,
                interfaces::DecoderBufferPtr encrypted,
                const DecryptCallback& callback) final;
   void CancelDecrypt(interfaces::DemuxerStream::Type stream_type) final;
   void InitializeAudioDecoder(
       interfaces::AudioDecoderConfigPtr config,
       const InitializeAudioDecoderCallback& callback) final;
   void InitializeVideoDecoder(
       interfaces::VideoDecoderConfigPtr config,
       const InitializeVideoDecoderCallback& callback) final;
@@ skipping 19 matching lines @@
                                  bool success);
 
   // Callbacks executed when DecryptAndDecode are done.
   void OnAudioDecoded(const DecryptAndDecodeAudioCallback& callback,
                       media::Decryptor::Status status,
                       const media::Decryptor::AudioFrames& frames);
   void OnVideoDecoded(const DecryptAndDecodeVideoCallback& callback,
                       media::Decryptor::Status status,
                       const scoped_refptr<VideoFrame>& frame);
 
+  // Helper functions to write and read a DecoderBuffer.
+  interfaces::DecoderBufferPtr TransferDecoderBuffer(
+      const scoped_refptr<DecoderBuffer>& buffer);
+  scoped_refptr<DecoderBuffer> ReadDecoderBuffer(
+      interfaces::DecoderBufferPtr buffer);
+
   // A weak binding is used to connect to the MojoDecryptor.
   mojo::Binding<interfaces::Decryptor> binding_;
 
+  // DataPipes for serializing the data section of DecoderBuffer into/from.
+  mojo::ScopedDataPipeProducerHandle producer_handle_;
+  mojo::ScopedDataPipeConsumerHandle consumer_handle_;
+
   // Keep ownership of |cdm_| while it is being used. |decryptor_| is the actual
   // Decryptor referenced by |cdm_|.
   scoped_refptr<MediaKeys> cdm_;
   media::Decryptor* decryptor_;
 
   base::WeakPtr<MojoDecryptorService> weak_this_;
   base::WeakPtrFactory<MojoDecryptorService> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MojoDecryptorService);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_MOJO_SERVICES_MOJO_DECRYPTOR_SERVICE_H_