Fix encrypted AAC in BMFF by adding subsample info.

media/mp4/aac.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_AAC_H_
 #define MEDIA_MP4_AAC_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 28 matching lines @@
   // AudioDecoderConfig.
   int GetOutputSamplesPerSecond(bool sbr_in_mimetype) const;
   ChannelLayout channel_layout() const;
 
   // This function converts a raw AAC frame into an AAC frame with an ADTS
   // header. On success, the function returns true and stores the converted data
   // in the buffer. The function returns false on failure and leaves the buffer
   // unchanged.
   bool ConvertEsdsToADTS(std::vector<uint8>* buffer) const;
 
+  // Size in bytes of the ADTS header added by ConvertEsdsToADTS().
+  static const size_t kADTSHeaderSize = 7;
+
  private:
   bool SkipDecoderGASpecificConfig(BitReader* bit_reader) const;
   bool SkipErrorSpecificConfig() const;
   bool SkipGASpecificConfig(BitReader* bit_reader) const;
 
   // The following variables store the AAC specific configuration information
   // that are used to generate the ADTS header.
   uint8 profile_;
   uint8 frequency_index_;
   uint8 channel_config_;
 
   // The following variables store audio configuration information that
   // can be used by Chromium. They are based on the AAC specific
   // configuration but can be overridden by extensions in elementary
   // stream descriptor.
   int frequency_;
   int extension_frequency_;
   ChannelLayout channel_layout_;
 };
 
 }  // namespace mp4
 
 }  // namespace media
 
 #endif  // MEDIA_MP4_AAC_H_