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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef MEDIA_FORMATS_MP4_AVC_H_ | 5 #ifndef MEDIA_FORMATS_MP4_AVC_H_ |
6 #define MEDIA_FORMATS_MP4_AVC_H_ | 6 #define MEDIA_FORMATS_MP4_AVC_H_ |
7 | 7 |
8 #include <vector> | 8 #include <vector> |
9 | 9 |
10 #include "base/basictypes.h" | |
11 #include "base/memory/scoped_ptr.h" | 10 #include "base/memory/scoped_ptr.h" |
12 #include "media/base/media_export.h" | 11 #include "media/base/media_export.h" |
13 #include "media/formats/mp4/bitstream_converter.h" | 12 #include "media/formats/mp4/bitstream_converter.h" |
14 | 13 |
15 namespace media { | 14 namespace media { |
16 | 15 |
17 struct SubsampleEntry; | 16 struct SubsampleEntry; |
18 | 17 |
19 namespace mp4 { | 18 namespace mp4 { |
20 | 19 |
21 struct AVCDecoderConfigurationRecord; | 20 struct AVCDecoderConfigurationRecord; |
22 | 21 |
23 class MEDIA_EXPORT AVC { | 22 class MEDIA_EXPORT AVC { |
24 public: | 23 public: |
25 static bool ConvertFrameToAnnexB(int length_size, | 24 static bool ConvertFrameToAnnexB(int length_size, |
26 std::vector<uint8>* buffer, | 25 std::vector<uint8_t>* buffer, |
27 std::vector<SubsampleEntry>* subsamples); | 26 std::vector<SubsampleEntry>* subsamples); |
28 | 27 |
29 // Inserts the SPS & PPS data from |avc_config| into |buffer|. | 28 // Inserts the SPS & PPS data from |avc_config| into |buffer|. |
30 // |buffer| is expected to contain AnnexB conformant data. | 29 // |buffer| is expected to contain AnnexB conformant data. |
31 // |subsamples| contains the SubsampleEntry info if |buffer| contains | 30 // |subsamples| contains the SubsampleEntry info if |buffer| contains |
32 // encrypted data. | 31 // encrypted data. |
33 // Returns true if the param sets were successfully inserted. | 32 // Returns true if the param sets were successfully inserted. |
34 static bool InsertParamSetsAnnexB( | 33 static bool InsertParamSetsAnnexB( |
35 const AVCDecoderConfigurationRecord& avc_config, | 34 const AVCDecoderConfigurationRecord& avc_config, |
36 std::vector<uint8>* buffer, | 35 std::vector<uint8_t>* buffer, |
37 std::vector<SubsampleEntry>* subsamples); | 36 std::vector<SubsampleEntry>* subsamples); |
38 | 37 |
39 static bool ConvertConfigToAnnexB( | 38 static bool ConvertConfigToAnnexB( |
40 const AVCDecoderConfigurationRecord& avc_config, | 39 const AVCDecoderConfigurationRecord& avc_config, |
41 std::vector<uint8>* buffer); | 40 std::vector<uint8_t>* buffer); |
42 | 41 |
43 // Verifies that the contents of |buffer| conform to | 42 // Verifies that the contents of |buffer| conform to |
44 // Section 7.4.1.2.3 of ISO/IEC 14496-10. | 43 // Section 7.4.1.2.3 of ISO/IEC 14496-10. |
45 // |subsamples| contains the information about what parts of the buffer are | 44 // |subsamples| contains the information about what parts of the buffer are |
46 // encrypted and which parts are clear. | 45 // encrypted and which parts are clear. |
47 // Returns true if |buffer| contains conformant Annex B data | 46 // Returns true if |buffer| contains conformant Annex B data |
48 // TODO(acolwell): Remove the std::vector version when we can use, | 47 // TODO(acolwell): Remove the std::vector version when we can use, |
49 // C++11's std::vector<T>::data() method. | 48 // C++11's std::vector<T>::data() method. |
50 static bool IsValidAnnexB(const std::vector<uint8>& buffer, | 49 static bool IsValidAnnexB(const std::vector<uint8_t>& buffer, |
51 const std::vector<SubsampleEntry>& subsamples); | 50 const std::vector<SubsampleEntry>& subsamples); |
52 static bool IsValidAnnexB(const uint8* buffer, size_t size, | 51 static bool IsValidAnnexB(const uint8_t* buffer, |
| 52 size_t size, |
53 const std::vector<SubsampleEntry>& subsamples); | 53 const std::vector<SubsampleEntry>& subsamples); |
54 | 54 |
55 // Given a |buffer| and |subsamples| information and |pts| pointer into the | 55 // Given a |buffer| and |subsamples| information and |pts| pointer into the |
56 // |buffer| finds the index of the subsample |ptr| is pointing into. | 56 // |buffer| finds the index of the subsample |ptr| is pointing into. |
57 static int FindSubsampleIndex(const std::vector<uint8>& buffer, | 57 static int FindSubsampleIndex(const std::vector<uint8_t>& buffer, |
58 const std::vector<SubsampleEntry>* subsamples, | 58 const std::vector<SubsampleEntry>* subsamples, |
59 const uint8* ptr); | 59 const uint8_t* ptr); |
60 }; | 60 }; |
61 | 61 |
62 // AVCBitstreamConverter converts AVC/H.264 bitstream from MP4 container format | 62 // AVCBitstreamConverter converts AVC/H.264 bitstream from MP4 container format |
63 // with embedded NALU lengths into AnnexB bitstream format (described in ISO/IEC | 63 // with embedded NALU lengths into AnnexB bitstream format (described in ISO/IEC |
64 // 14496-10) with 4-byte start codes. It also knows how to handle CENC-encrypted | 64 // 14496-10) with 4-byte start codes. It also knows how to handle CENC-encrypted |
65 // streams and adjusts subsample data for those streams while converting. | 65 // streams and adjusts subsample data for those streams while converting. |
66 class AVCBitstreamConverter : public BitstreamConverter { | 66 class AVCBitstreamConverter : public BitstreamConverter { |
67 public: | 67 public: |
68 explicit AVCBitstreamConverter( | 68 explicit AVCBitstreamConverter( |
69 scoped_ptr<AVCDecoderConfigurationRecord> avc_config); | 69 scoped_ptr<AVCDecoderConfigurationRecord> avc_config); |
70 | 70 |
71 // BitstreamConverter interface | 71 // BitstreamConverter interface |
72 bool ConvertFrame(std::vector<uint8>* frame_buf, | 72 bool ConvertFrame(std::vector<uint8_t>* frame_buf, |
73 bool is_keyframe, | 73 bool is_keyframe, |
74 std::vector<SubsampleEntry>* subsamples) const override; | 74 std::vector<SubsampleEntry>* subsamples) const override; |
| 75 |
75 private: | 76 private: |
76 ~AVCBitstreamConverter() override; | 77 ~AVCBitstreamConverter() override; |
77 scoped_ptr<AVCDecoderConfigurationRecord> avc_config_; | 78 scoped_ptr<AVCDecoderConfigurationRecord> avc_config_; |
78 }; | 79 }; |
79 | 80 |
80 } // namespace mp4 | 81 } // namespace mp4 |
81 } // namespace media | 82 } // namespace media |
82 | 83 |
83 #endif // MEDIA_FORMATS_MP4_AVC_H_ | 84 #endif // MEDIA_FORMATS_MP4_AVC_H_ |
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