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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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_BASE_STREAM_PARSER_H_ | 5 #ifndef MEDIA_BASE_STREAM_PARSER_H_ |
6 #define MEDIA_BASE_STREAM_PARSER_H_ | 6 #define MEDIA_BASE_STREAM_PARSER_H_ |
7 | 7 |
8 #include <deque> | 8 #include <deque> |
9 #include <map> | 9 #include <map> |
10 #include <string> | 10 #include <string> |
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99 const BufferQueue&, | 99 const BufferQueue&, |
100 const TextBufferQueueMap&)> NewBuffersCB; | 100 const TextBufferQueueMap&)> NewBuffersCB; |
101 | 101 |
102 // Signals the beginning of a new media segment. | 102 // Signals the beginning of a new media segment. |
103 typedef base::Callback<void()> NewMediaSegmentCB; | 103 typedef base::Callback<void()> NewMediaSegmentCB; |
104 | 104 |
105 // A new potentially encrypted stream has been parsed. | 105 // A new potentially encrypted stream has been parsed. |
106 // First parameter - The type of the initialization data associated with the | 106 // First parameter - The type of the initialization data associated with the |
107 // stream. | 107 // stream. |
108 // Second parameter - The initialization data associated with the stream. | 108 // Second parameter - The initialization data associated with the stream. |
109 typedef base::Callback<void(EmeInitDataType, const std::vector<uint8>&)> | 109 typedef base::Callback<void(EmeInitDataType, const std::vector<uint8_t>&)> |
110 EncryptedMediaInitDataCB; | 110 EncryptedMediaInitDataCB; |
111 | 111 |
112 StreamParser(); | 112 StreamParser(); |
113 virtual ~StreamParser(); | 113 virtual ~StreamParser(); |
114 | 114 |
115 // Initializes the parser with necessary callbacks. Must be called before any | 115 // Initializes the parser with necessary callbacks. Must be called before any |
116 // data is passed to Parse(). |init_cb| will be called once enough data has | 116 // data is passed to Parse(). |init_cb| will be called once enough data has |
117 // been parsed to determine the initial stream configurations, presentation | 117 // been parsed to determine the initial stream configurations, presentation |
118 // start time, and duration. If |ignore_text_track| is true, then no text | 118 // start time, and duration. If |ignore_text_track| is true, then no text |
119 // buffers should be passed later by the parser to |new_buffers_cb|. | 119 // buffers should be passed later by the parser to |new_buffers_cb|. |
120 virtual void Init( | 120 virtual void Init( |
121 const InitCB& init_cb, | 121 const InitCB& init_cb, |
122 const NewConfigCB& config_cb, | 122 const NewConfigCB& config_cb, |
123 const NewBuffersCB& new_buffers_cb, | 123 const NewBuffersCB& new_buffers_cb, |
124 bool ignore_text_track, | 124 bool ignore_text_track, |
125 const EncryptedMediaInitDataCB& encrypted_media_init_data_cb, | 125 const EncryptedMediaInitDataCB& encrypted_media_init_data_cb, |
126 const NewMediaSegmentCB& new_segment_cb, | 126 const NewMediaSegmentCB& new_segment_cb, |
127 const base::Closure& end_of_segment_cb, | 127 const base::Closure& end_of_segment_cb, |
128 const scoped_refptr<MediaLog>& media_log) = 0; | 128 const scoped_refptr<MediaLog>& media_log) = 0; |
129 | 129 |
130 // Called when a seek occurs. This flushes the current parser state | 130 // Called when a seek occurs. This flushes the current parser state |
131 // and puts the parser in a state where it can receive data for the new seek | 131 // and puts the parser in a state where it can receive data for the new seek |
132 // point. | 132 // point. |
133 virtual void Flush() = 0; | 133 virtual void Flush() = 0; |
134 | 134 |
135 // Called when there is new data to parse. | 135 // Called when there is new data to parse. |
136 // | 136 // |
137 // Returns true if the parse succeeds. | 137 // Returns true if the parse succeeds. |
138 virtual bool Parse(const uint8* buf, int size) = 0; | 138 virtual bool Parse(const uint8_t* buf, int size) = 0; |
139 | 139 |
140 private: | 140 private: |
141 DISALLOW_COPY_AND_ASSIGN(StreamParser); | 141 DISALLOW_COPY_AND_ASSIGN(StreamParser); |
142 }; | 142 }; |
143 | 143 |
144 // Appends to |merged_buffers| the provided buffers in decode-timestamp order. | 144 // Appends to |merged_buffers| the provided buffers in decode-timestamp order. |
145 // Any previous contents of |merged_buffers| is assumed to have lower | 145 // Any previous contents of |merged_buffers| is assumed to have lower |
146 // decode timestamps versus the provided buffers. All provided buffer queues | 146 // decode timestamps versus the provided buffers. All provided buffer queues |
147 // are assumed to already be in decode-timestamp order. | 147 // are assumed to already be in decode-timestamp order. |
148 // Returns false if any of the provided audio/video/text buffers are found | 148 // Returns false if any of the provided audio/video/text buffers are found |
149 // to not be in decode timestamp order, or have a decode timestamp less than | 149 // to not be in decode timestamp order, or have a decode timestamp less than |
150 // the last buffer, if any, in |merged_buffers|. Partial results may exist | 150 // the last buffer, if any, in |merged_buffers|. Partial results may exist |
151 // in |merged_buffers| in this case. Returns true on success. | 151 // in |merged_buffers| in this case. Returns true on success. |
152 // No validation of media type within the various buffer queues is done here. | 152 // No validation of media type within the various buffer queues is done here. |
153 // TODO(wolenetz/acolwell): Merge incrementally in parsers to eliminate | 153 // TODO(wolenetz/acolwell): Merge incrementally in parsers to eliminate |
154 // subtle issues with tie-breaking. See http://crbug.com/338484. | 154 // subtle issues with tie-breaking. See http://crbug.com/338484. |
155 MEDIA_EXPORT bool MergeBufferQueues( | 155 MEDIA_EXPORT bool MergeBufferQueues( |
156 const StreamParser::BufferQueue& audio_buffers, | 156 const StreamParser::BufferQueue& audio_buffers, |
157 const StreamParser::BufferQueue& video_buffers, | 157 const StreamParser::BufferQueue& video_buffers, |
158 const StreamParser::TextBufferQueueMap& text_buffers, | 158 const StreamParser::TextBufferQueueMap& text_buffers, |
159 StreamParser::BufferQueue* merged_buffers); | 159 StreamParser::BufferQueue* merged_buffers); |
160 | 160 |
161 } // namespace media | 161 } // namespace media |
162 | 162 |
163 #endif // MEDIA_BASE_STREAM_PARSER_H_ | 163 #endif // MEDIA_BASE_STREAM_PARSER_H_ |
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