Support EAC3 (Dolby Digital Plus) codec

media/mp4/es_descriptor.cc

 // 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.
 
 #include "media/mp4/es_descriptor.h"
 
 #include "media/base/bit_reader.h"
 #include "media/mp4/rcheck.h"
 
 // The elementary stream size is specific by up to 4 bytes.
@@ skipping 13 matching lines @@
       break;
   }
 
   return true;
 }
 
 namespace media {
 
 namespace mp4 {
 
+// static
+bool ESDescriptor::IsAAC(uint8 object_type) {
+  return object_type == kISO_14496_3 || object_type == kISO_13818_7_AAC_LC;
+}
+
 ESDescriptor::ESDescriptor()
     : object_type_(kForbidden) {
 }
 
 ESDescriptor::~ESDescriptor() {}
 
 bool ESDescriptor::Parse(const std::vector<uint8>& data) {
   BitReader reader(&data[0], data.size());
   uint8 tag;
   uint32 size;
@@ skipping 59 matching lines @@
   decoder_specific_info_.resize(size);
   for (uint32 i = 0; i < size; ++i)
     RCHECK(reader->ReadBits(8, &decoder_specific_info_[i]));
 
   return true;
 }
 
 }  // namespace mp4
 
 }  // namespace media