Parse ELNG box in MP4 container

media/formats/mp4/box_definitions.cc

 // 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.
 
 #include "media/formats/mp4/box_definitions.h"
 
 #include <utility>
 
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 758 matching lines @@
 
 MediaInformation::MediaInformation() {}
 MediaInformation::~MediaInformation() {}
 FourCC MediaInformation::BoxType() const { return FOURCC_MINF; }
 
 bool MediaInformation::Parse(BoxReader* reader) {
   return reader->ScanChildren() &&
          reader->ReadChild(&sample_table);
 }
 
+ExtendedLanguageTag::ExtendedLanguageTag() {}
+ExtendedLanguageTag::~ExtendedLanguageTag() {}
+FourCC ExtendedLanguageTag::BoxType() const {
+  return FOURCC_ELNG;
+}
+
+bool ExtendedLanguageTag::Parse(BoxReader* reader) {
+  RCHECK(reader->ReadFullBoxHeader());
+  RCHECK(reader->ReadString(&language_tag));
+  return true;
+}
+
 Media::Media() {}
 Media::~Media() {}
 FourCC Media::BoxType() const { return FOURCC_MDIA; }
 
 bool Media::Parse(BoxReader* reader) {
-  RCHECK(reader->ScanChildren() &&
-         reader->ReadChild(&header) &&
+  RCHECK(reader->ScanChildren() && reader->ReadChild(&header) &&
+         reader->MaybeReadChild(&extended_language_tag) &&
          reader->ReadChild(&handler));
 
   // Maddeningly, the HandlerReference box specifies how to parse the
   // SampleDescription box, making the latter the only box (of those that we
   // support) which cannot be parsed correctly on its own (or even with
   // information from its strict ancestor tree). We thus copy the handler type
   // to the sample description box *before* parsing it to provide this
   // information while parsing.
   information.sample_table.description.type = handler.type;
   RCHECK(reader->ReadChild(&information));
@@ skipping 358 matching lines @@
 SampleDependsOn IndependentAndDisposableSamples::sample_depends_on(
     size_t i) const {
   if (i >= sample_depends_on_.size())
     return kSampleDependsOnUnknown;
 
   return sample_depends_on_[i];
 }
 
 }  // namespace mp4
 }  // namespace media