Support parsing of sgpd and sbgp boxes

media/formats/mp4/box_definitions.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 MEDIA_FORMATS_MP4_BOX_DEFINITIONS_H_
 #define MEDIA_FORMATS_MP4_BOX_DEFINITIONS_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 347 matching lines @@
 
   // Returns the SampleDependsOn value for the |i|'th value
   // in the track. If no data was parsed for the |i|'th sample,
   // then |kSampleDependsOnUnknown| is returned.
   SampleDependsOn sample_depends_on(size_t i) const;
 
  private:
   std::vector<SampleDependsOn> sample_depends_on_;
 };
 
+struct MEDIA_EXPORT CencSampleEncryptionInfoEntry {
+  CencSampleEncryptionInfoEntry();
+  ~CencSampleEncryptionInfoEntry();
+
+  bool is_encrypted;
+  uint8 iv_size;
+  std::vector<uint8> key_id;
+};
+
+struct MEDIA_EXPORT SampleGroupDescription : Box {  // 'sgpd'.
+  DECLARE_BOX_METHODS(SampleGroupDescription);
+
+  uint32 grouping_type;
+  std::vector<CencSampleEncryptionInfoEntry> entries;
+};
+
+struct MEDIA_EXPORT SampleToGroupEntry {
+  enum GroupDescriptionIndexBase {
+    kTrackGroupDescriptionIndexBase = 0,
+    kFragmentGroupDescriptionIndexBase = 0x10000,
+  };
+
+  uint32 sample_count;
+  uint32 group_description_index;
+};
+
+struct MEDIA_EXPORT SampleToGroup : Box {  // 'sbgp'.
+  DECLARE_BOX_METHODS(SampleToGroup);
+
+  uint32 grouping_type;
+  uint32 grouping_type_parameter;  // Version 1 only.
+  std::vector<SampleToGroupEntry> entries;
+};
+
 struct MEDIA_EXPORT TrackFragment : Box {
   DECLARE_BOX_METHODS(TrackFragment);
 
   TrackFragmentHeader header;
   std::vector<TrackFragmentRun> runs;
   TrackFragmentDecodeTime decode_time;
   SampleAuxiliaryInformationOffset auxiliary_offset;
   SampleAuxiliaryInformationSize auxiliary_size;
   IndependentAndDisposableSamples sdtp;
+  SampleGroupDescription sample_group_description;
+  SampleToGroup sample_to_group;
 };
 
 struct MEDIA_EXPORT MovieFragment : Box {
   DECLARE_BOX_METHODS(MovieFragment);
 
   MovieFragmentHeader header;
   std::vector<TrackFragment> tracks;
   std::vector<ProtectionSystemSpecificHeader> pssh;
 };
 
 #undef DECLARE_BOX
 
 }  // namespace mp4
 }  // namespace media
 
 #endif  // MEDIA_FORMATS_MP4_BOX_DEFINITIONS_H_