Parse ELNG box in MP4 container

media/formats/mp4/box_reader.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_reader.h"
 
 #include <stddef.h>
 #include <string.h>
 #include <algorithm>
 #include <set>
@@ skipping 49 matching lines @@
 }
 
 bool BufferReader::ReadVec(std::vector<uint8_t>* vec, uint64_t count) {
   RCHECK(HasBytes(count));
   vec->clear();
   vec->insert(vec->end(), buf_ + pos_, buf_ + pos_ + count);
   pos_ += count;
   return true;
 }
 
+bool BufferReader::ReadString(std::string* v) {
+  RCHECK(v);
+  *v = "";
+  uint8_t c = 0;
+  while (Read1(&c) && c != 0) {
+    v->push_back(c);
+  }
+  // Return error if we didn't find the terminating zero character.
+  if (c != 0)
+    return false;
+  return true;
+}
+
 bool BufferReader::SkipBytes(uint64_t bytes) {
   RCHECK(HasBytes(bytes));
   pos_ += bytes;
   return true;
 }
 
 bool BufferReader::Read4Into8(uint64_t* v) {
   uint32_t tmp;
   RCHECK(Read4(&tmp));
   *v = tmp;
@@ skipping 198 matching lines @@
   }
 
   // Note that the pos_ head has advanced to the byte immediately after the
   // header, which is where we want it.
   size_ = size;
   return true;
 }
 
 }  // namespace mp4
 }  // namespace media