Add Common Encryption support to BMFF, including subsample decryption.

media/mp4/mp4_stream_parser.h

 // Copyright (c) 2012 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_MP4_MP4_STREAM_PARSER_H_
 #define MEDIA_MP4_MP4_STREAM_PARSER_H_
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/compiler_specific.h"
@@ skipping 27 matching lines @@
     kWaitingForInit,
     kParsingBoxes,
     kEmittingSamples,
     kError
   };
 
   bool ParseBox(bool* err);
   bool ParseMoov(mp4::BoxReader* reader);
   bool ParseMoof(mp4::BoxReader* reader);
 
+  bool EmitKeyNeeded(const TrackEncryption& track_encryption);
+
   bool ReadMDATsUntil(const int64 tgt_tail);
 
   void ChangeState(State new_state);
 
   bool EmitConfigs();
   bool EnqueueSample(BufferQueue* audio_buffers,
                      BufferQueue* video_buffers,
                      bool* err);
 
   State state_;
@@ skipping 30 matching lines @@
   // every frame.
   uint8 size_of_nalu_length_;
 
   DISALLOW_COPY_AND_ASSIGN(MP4StreamParser);
 };
 
 }  // namespace mp4
 }  // namespace media
 
 #endif  // MEDIA_MP4_MP4_STREAM_PARSER_H_