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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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