1 // Copyright 2014 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef MEDIA_FORMATS_MP4_AVC_H_ 6 #define MEDIA_FORMATS_MP4_AVC_H_ 7 8 #include <vector> 9 10 #include "base/basictypes.h" 11 #include "media/base/media_export.h" 12 13 namespace media { 14 15 struct SubsampleEntry; 16 17 namespace mp4 { 18 19 struct AVCDecoderConfigurationRecord; 20 21 class MEDIA_EXPORT AVC { 22 public: 23 static bool ConvertFrameToAnnexB(int length_size, std::vector<uint8>* buffer); 24 25 // Inserts the SPS & PPS data from |avc_config| into |buffer|. 26 // |buffer| is expected to contain AnnexB conformant data. 27 // |subsamples| contains the SubsampleEntry info if |buffer| contains 28 // encrypted data. 29 // Returns true if the param sets were successfully inserted. 30 static bool InsertParamSetsAnnexB( 31 const AVCDecoderConfigurationRecord& avc_config, 32 std::vector<uint8>* buffer, 33 std::vector<SubsampleEntry>* subsamples); 34 35 static bool ConvertConfigToAnnexB( 36 const AVCDecoderConfigurationRecord& avc_config, 37 std::vector<uint8>* buffer, 38 std::vector<SubsampleEntry>* subsamples); 39 40 // Verifies that the contents of |buffer| conform to 41 // Section 7.4.1.2.3 of ISO/IEC 14496-10. 42 // |subsamples| contains the information about what parts of the buffer are 43 // encrypted and which parts are clear. 44 // Returns true if |buffer| contains conformant Annex B data 45 // TODO(acolwell): Remove the std::vector version when we can use, 46 // C++11's std::vector<T>::data() method. 47 static bool IsValidAnnexB(const std::vector<uint8>& buffer, 48 const std::vector<SubsampleEntry>& subsamples); 49 static bool IsValidAnnexB(const uint8* buffer, size_t size, 50 const std::vector<SubsampleEntry>& subsamples); 51 }; 52 53 } // namespace mp4 54 } // namespace media 55 56 #endif // MEDIA_FORMATS_MP4_AVC_H_ 57
