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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 |
| (...skipping 10 matching lines...) Expand all Loading... |
| 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. |
| (...skipping 22 matching lines...) Expand all Loading... |
| 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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