avc.h revision 5f1c94371a64b3196d4be9466099bb892df9b88e 
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
13namespace media {
14
15struct SubsampleEntry;
16
17namespace mp4 {
18
19struct AVCDecoderConfigurationRecord;
20
21class 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