Fix SPS/PPS insertion logic in MP4StreamParser.

media/formats/mp4/avc.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_AVC_H_
 #define MEDIA_FORMATS_MP4_AVC_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "media/base/media_export.h"
 
 namespace media {
 namespace mp4 {
 
 struct AVCDecoderConfigurationRecord;
 
 class MEDIA_EXPORT AVC {
  public:
   static bool ConvertFrameToAnnexB(int length_size, std::vector<uint8>* buffer);
 
+  // Inserts the SPS & PPS data from |avc_config| into |buffer|.
+  // |buffer| is expected to contain AnnexB conformant data.
+  // Returns true if the param sets were successfully inserted.
+  static bool InsertParamSetsAnnexB(
+      const AVCDecoderConfigurationRecord& avc_config,
+      std::vector<uint8>* buffer);
+
   static bool ConvertConfigToAnnexB(
       const AVCDecoderConfigurationRecord& avc_config,
       std::vector<uint8>* buffer);
+
+  // Verifies that the contents of |buffer| conform to
+  // Section 7.4.1.2.3 of ISO/IEC 14496-10.
+  // Returns true if |buffer| contains conformant AnnexB data.
+  static bool IsValidAnnexB(const std::vector<uint8>& buffer);
 };
 
 }  // namespace mp4
 }  // namespace media
 
 #endif  // MEDIA_FORMATS_MP4_AVC_H_