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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_MP4_STREAM_PARSER_H_ | 5 #ifndef MEDIA_FORMATS_MP4_MP4_STREAM_PARSER_H_ |
6 #define MEDIA_FORMATS_MP4_MP4_STREAM_PARSER_H_ | 6 #define MEDIA_FORMATS_MP4_MP4_STREAM_PARSER_H_ |
7 | 7 |
8 #include <set> | 8 #include <set> |
9 #include <vector> | 9 #include <vector> |
10 | 10 |
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21 namespace mp4 { | 21 namespace mp4 { |
22 | 22 |
23 struct Movie; | 23 struct Movie; |
24 class BoxReader; | 24 class BoxReader; |
25 | 25 |
26 class MEDIA_EXPORT MP4StreamParser : public StreamParser { | 26 class MEDIA_EXPORT MP4StreamParser : public StreamParser { |
27 public: | 27 public: |
28 MP4StreamParser(const std::set<int>& audio_object_types, bool has_sbr); | 28 MP4StreamParser(const std::set<int>& audio_object_types, bool has_sbr); |
29 virtual ~MP4StreamParser(); | 29 virtual ~MP4StreamParser(); |
30 | 30 |
31 virtual void Init(const InitCB& init_cb, const NewConfigCB& config_cb, | 31 virtual void Init( |
32 const NewBuffersCB& new_buffers_cb, | 32 const InitCB& init_cb, |
33 bool ignore_text_tracks, | 33 const NewConfigCB& config_cb, |
34 const NeedKeyCB& need_key_cb, | 34 const NewBuffersCB& new_buffers_cb, |
35 const NewMediaSegmentCB& new_segment_cb, | 35 bool ignore_text_tracks, |
36 const base::Closure& end_of_segment_cb, | 36 const EncryptedMediaInitDataCB& encrypted_media_init_data_cb, |
37 const LogCB& log_cb) override; | 37 const NewMediaSegmentCB& new_segment_cb, |
| 38 const base::Closure& end_of_segment_cb, |
| 39 const LogCB& log_cb) override; |
38 virtual void Flush() override; | 40 virtual void Flush() override; |
39 virtual bool Parse(const uint8* buf, int size) override; | 41 virtual bool Parse(const uint8* buf, int size) override; |
40 | 42 |
41 private: | 43 private: |
42 enum State { | 44 enum State { |
43 kWaitingForInit, | 45 kWaitingForInit, |
44 kParsingBoxes, | 46 kParsingBoxes, |
45 kWaitingForSampleData, | 47 kWaitingForSampleData, |
46 kEmittingSamples, | 48 kEmittingSamples, |
47 kError | 49 kError |
48 }; | 50 }; |
49 | 51 |
50 bool ParseBox(bool* err); | 52 bool ParseBox(bool* err); |
51 bool ParseMoov(mp4::BoxReader* reader); | 53 bool ParseMoov(mp4::BoxReader* reader); |
52 bool ParseMoof(mp4::BoxReader* reader); | 54 bool ParseMoof(mp4::BoxReader* reader); |
53 | 55 |
54 void EmitNeedKeyIfNecessary( | 56 void OnEncryptedMediaInitData( |
55 const std::vector<ProtectionSystemSpecificHeader>& headers); | 57 const std::vector<ProtectionSystemSpecificHeader>& headers); |
56 | 58 |
57 // To retain proper framing, each 'mdat' atom must be read; to limit memory | 59 // To retain proper framing, each 'mdat' atom must be read; to limit memory |
58 // usage, the atom's data needs to be discarded incrementally as frames are | 60 // usage, the atom's data needs to be discarded incrementally as frames are |
59 // extracted from the stream. This function discards data from the stream up | 61 // extracted from the stream. This function discards data from the stream up |
60 // to |max_clear_offset|, updating the |mdat_tail_| value so that framing can | 62 // to |max_clear_offset|, updating the |mdat_tail_| value so that framing can |
61 // be retained after all 'mdat' information has been read. |max_clear_offset| | 63 // be retained after all 'mdat' information has been read. |max_clear_offset| |
62 // is the upper bound on what can be removed from |queue_|. Anything below | 64 // is the upper bound on what can be removed from |queue_|. Anything below |
63 // this offset is no longer needed by the parser. | 65 // this offset is no longer needed by the parser. |
64 // Returns 'true' on success, 'false' if there was an error. | 66 // Returns 'true' on success, 'false' if there was an error. |
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87 | 89 |
88 // Sets |highest_end_offset_| based on the data in |moov_| | 90 // Sets |highest_end_offset_| based on the data in |moov_| |
89 // and |moof|. Returns true if |highest_end_offset_| was successfully | 91 // and |moof|. Returns true if |highest_end_offset_| was successfully |
90 // computed. | 92 // computed. |
91 bool ComputeHighestEndOffset(const MovieFragment& moof); | 93 bool ComputeHighestEndOffset(const MovieFragment& moof); |
92 | 94 |
93 State state_; | 95 State state_; |
94 InitCB init_cb_; | 96 InitCB init_cb_; |
95 NewConfigCB config_cb_; | 97 NewConfigCB config_cb_; |
96 NewBuffersCB new_buffers_cb_; | 98 NewBuffersCB new_buffers_cb_; |
97 NeedKeyCB need_key_cb_; | 99 EncryptedMediaInitDataCB encrypted_media_init_data_cb_; |
98 NewMediaSegmentCB new_segment_cb_; | 100 NewMediaSegmentCB new_segment_cb_; |
99 base::Closure end_of_segment_cb_; | 101 base::Closure end_of_segment_cb_; |
100 LogCB log_cb_; | 102 LogCB log_cb_; |
101 | 103 |
102 OffsetByteQueue queue_; | 104 OffsetByteQueue queue_; |
103 | 105 |
104 // These two parameters are only valid in the |kEmittingSegments| state. | 106 // These two parameters are only valid in the |kEmittingSegments| state. |
105 // | 107 // |
106 // |moof_head_| is the offset of the start of the most recently parsed moof | 108 // |moof_head_| is the offset of the start of the most recently parsed moof |
107 // block. All byte offsets in sample information are relative to this offset, | 109 // block. All byte offsets in sample information are relative to this offset, |
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129 bool is_audio_track_encrypted_; | 131 bool is_audio_track_encrypted_; |
130 bool is_video_track_encrypted_; | 132 bool is_video_track_encrypted_; |
131 | 133 |
132 DISALLOW_COPY_AND_ASSIGN(MP4StreamParser); | 134 DISALLOW_COPY_AND_ASSIGN(MP4StreamParser); |
133 }; | 135 }; |
134 | 136 |
135 } // namespace mp4 | 137 } // namespace mp4 |
136 } // namespace media | 138 } // namespace media |
137 | 139 |
138 #endif // MEDIA_FORMATS_MP4_MP4_STREAM_PARSER_H_ | 140 #endif // MEDIA_FORMATS_MP4_MP4_STREAM_PARSER_H_ |
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