Implement reading of media track info from WebM and MP4 containers

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 <stddef.h>
 #include <stdint.h>
 
@@ skipping 145 matching lines @@
 struct MEDIA_EXPORT Edit : Box {
   DECLARE_BOX_METHODS(Edit);
 
   EditList list;
 };
 
 struct MEDIA_EXPORT HandlerReference : Box {
   DECLARE_BOX_METHODS(HandlerReference);
 
   TrackType type;
+  std::string name;
 };
 
 struct MEDIA_EXPORT AVCDecoderConfigurationRecord : Box {
   DECLARE_BOX_METHODS(AVCDecoderConfigurationRecord);
 
   // Parses AVCDecoderConfigurationRecord data encoded in |data|.
   // Note: This method is intended to parse data outside the MP4StreamParser
   //       context and therefore the box header is not expected to be present
   //       in |data|.
   // Returns true if |data| was successfully parsed.
@@ skipping 93 matching lines @@
   // including some that are required to be present in the BMFF spec. This
   // includes the 'stts', 'stsc', and 'stco' boxes, which must contain no
   // samples in order to be compliant files.
   SampleDescription description;
   SampleGroupDescription sample_group_description;
 };
 
 struct MEDIA_EXPORT MediaHeader : Box {
   DECLARE_BOX_METHODS(MediaHeader);
 
+  std::string language() const;
+
   uint64_t creation_time;
   uint64_t modification_time;
   uint32_t timescale;
   uint64_t duration;
+  uint16_t language_code;
 };
 
 struct MEDIA_EXPORT MediaInformation : Box {
   DECLARE_BOX_METHODS(MediaInformation);
 
   SampleTable sample_table;
 };
 
 struct MEDIA_EXPORT Media : Box {
   DECLARE_BOX_METHODS(Media);
@@ skipping 141 matching lines @@
   std::vector<TrackFragment> tracks;
   std::vector<ProtectionSystemSpecificHeader> pssh;
 };
 
 #undef DECLARE_BOX
 
 }  // namespace mp4
 }  // namespace media
 
 #endif  // MEDIA_FORMATS_MP4_BOX_DEFINITIONS_H_