Chromecast media pipeline: handle CENC "full sample encryption" case.

chromecast/media/cma/ipc_streamer/decrypt_config_marshaller.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_IPC_STREAMER_DECRYPT_CONFIG_MARSHALLER_H_
 #define CHROMECAST_MEDIA_CMA_IPC_STREAMER_DECRYPT_CONFIG_MARSHALLER_H_
 
 #include "base/memory/scoped_ptr.h"
 
 namespace media {
 class DecryptConfig;
 }
 
 namespace chromecast {
 namespace media {
 class MediaMessage;
 
 class DecryptConfigMarshaller {
  public:
   // Writes the serialized structure of |config| into |msg|.
   static void Write(
       const ::media::DecryptConfig& config, MediaMessage* msg);
 
+  // Writes the serialized structure of |config| into |msg|, assuming one
+  // subsample with |data_size| encrypted bytes. This handles the
+  // "Full Sample Encryption" case in ISO/IEC 23001-7:2012 9.5.
+  static void WriteFullSampleEncryption(
+      const ::media::DecryptConfig& config, int data_size, MediaMessage* msg);
+
   // Returns a DecryptConfig from its serialized structure.
   static scoped_ptr< ::media::DecryptConfig> Read(MediaMessage* msg);
 };
 
 }  // namespace media
 }  // namespace chromecast
 
 #endif  // CHROMECAST_MEDIA_CMA_IPC_STREAMER_DECRYPT_CONFIG_MARSHALLER_H_