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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_WEBM_WEBM_STREAM_PARSER_H_ | 5 #ifndef MEDIA_FORMATS_WEBM_WEBM_STREAM_PARSER_H_ |
6 #define MEDIA_FORMATS_WEBM_WEBM_STREAM_PARSER_H_ | 6 #define MEDIA_FORMATS_WEBM_WEBM_STREAM_PARSER_H_ |
7 | 7 |
8 #include "base/callback_forward.h" | 8 #include "base/callback_forward.h" |
9 #include "base/memory/ref_counted.h" | 9 #include "base/memory/ref_counted.h" |
10 #include "media/base/audio_decoder_config.h" | 10 #include "media/base/audio_decoder_config.h" |
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24 // StreamParser implementation. | 24 // StreamParser implementation. |
25 void Init(const InitCB& init_cb, | 25 void Init(const InitCB& init_cb, |
26 const NewConfigCB& config_cb, | 26 const NewConfigCB& config_cb, |
27 const NewBuffersCB& new_buffers_cb, | 27 const NewBuffersCB& new_buffers_cb, |
28 bool ignore_text_tracks, | 28 bool ignore_text_tracks, |
29 const EncryptedMediaInitDataCB& encrypted_media_init_data_cb, | 29 const EncryptedMediaInitDataCB& encrypted_media_init_data_cb, |
30 const NewMediaSegmentCB& new_segment_cb, | 30 const NewMediaSegmentCB& new_segment_cb, |
31 const base::Closure& end_of_segment_cb, | 31 const base::Closure& end_of_segment_cb, |
32 const scoped_refptr<MediaLog>& media_log) override; | 32 const scoped_refptr<MediaLog>& media_log) override; |
33 void Flush() override; | 33 void Flush() override; |
34 bool Parse(const uint8* buf, int size) override; | 34 bool Parse(const uint8_t* buf, int size) override; |
35 | 35 |
36 private: | 36 private: |
37 enum State { | 37 enum State { |
38 kWaitingForInit, | 38 kWaitingForInit, |
39 kParsingHeaders, | 39 kParsingHeaders, |
40 kParsingClusters, | 40 kParsingClusters, |
41 kError | 41 kError |
42 }; | 42 }; |
43 | 43 |
44 void ChangeState(State new_state); | 44 void ChangeState(State new_state); |
45 | 45 |
46 // Parses WebM Header, Info, Tracks elements. It also skips other level 1 | 46 // Parses WebM Header, Info, Tracks elements. It also skips other level 1 |
47 // elements that are not used right now. Once the Info & Tracks elements have | 47 // elements that are not used right now. Once the Info & Tracks elements have |
48 // been parsed, this method will transition the parser from PARSING_HEADERS to | 48 // been parsed, this method will transition the parser from PARSING_HEADERS to |
49 // PARSING_CLUSTERS. | 49 // PARSING_CLUSTERS. |
50 // | 50 // |
51 // Returns < 0 if the parse fails. | 51 // Returns < 0 if the parse fails. |
52 // Returns 0 if more data is needed. | 52 // Returns 0 if more data is needed. |
53 // Returning > 0 indicates success & the number of bytes parsed. | 53 // Returning > 0 indicates success & the number of bytes parsed. |
54 int ParseInfoAndTracks(const uint8* data, int size); | 54 int ParseInfoAndTracks(const uint8_t* data, int size); |
55 | 55 |
56 // Incrementally parses WebM cluster elements. This method also skips | 56 // Incrementally parses WebM cluster elements. This method also skips |
57 // CUES elements if they are encountered since we currently don't use the | 57 // CUES elements if they are encountered since we currently don't use the |
58 // data in these elements. | 58 // data in these elements. |
59 // | 59 // |
60 // Returns < 0 if the parse fails. | 60 // Returns < 0 if the parse fails. |
61 // Returns 0 if more data is needed. | 61 // Returns 0 if more data is needed. |
62 // Returning > 0 indicates success & the number of bytes parsed. | 62 // Returning > 0 indicates success & the number of bytes parsed. |
63 int ParseCluster(const uint8* data, int size); | 63 int ParseCluster(const uint8_t* data, int size); |
64 | 64 |
65 // Fire needkey event through the |encrypted_media_init_data_cb_|. | 65 // Fire needkey event through the |encrypted_media_init_data_cb_|. |
66 void OnEncryptedMediaInitData(const std::string& key_id); | 66 void OnEncryptedMediaInitData(const std::string& key_id); |
67 | 67 |
68 State state_; | 68 State state_; |
69 InitCB init_cb_; | 69 InitCB init_cb_; |
70 NewConfigCB config_cb_; | 70 NewConfigCB config_cb_; |
71 NewBuffersCB new_buffers_cb_; | 71 NewBuffersCB new_buffers_cb_; |
72 bool ignore_text_tracks_; | 72 bool ignore_text_tracks_; |
73 EncryptedMediaInitDataCB encrypted_media_init_data_cb_; | 73 EncryptedMediaInitDataCB encrypted_media_init_data_cb_; |
74 | 74 |
75 NewMediaSegmentCB new_segment_cb_; | 75 NewMediaSegmentCB new_segment_cb_; |
76 base::Closure end_of_segment_cb_; | 76 base::Closure end_of_segment_cb_; |
77 scoped_refptr<MediaLog> media_log_; | 77 scoped_refptr<MediaLog> media_log_; |
78 | 78 |
79 bool unknown_segment_size_; | 79 bool unknown_segment_size_; |
80 | 80 |
81 scoped_ptr<WebMClusterParser> cluster_parser_; | 81 scoped_ptr<WebMClusterParser> cluster_parser_; |
82 ByteQueue byte_queue_; | 82 ByteQueue byte_queue_; |
83 | 83 |
84 DISALLOW_COPY_AND_ASSIGN(WebMStreamParser); | 84 DISALLOW_COPY_AND_ASSIGN(WebMStreamParser); |
85 }; | 85 }; |
86 | 86 |
87 } // namespace media | 87 } // namespace media |
88 | 88 |
89 #endif // MEDIA_FORMATS_WEBM_WEBM_STREAM_PARSER_H_ | 89 #endif // MEDIA_FORMATS_WEBM_WEBM_STREAM_PARSER_H_ |
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