OLD | NEW |
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 // SourceBufferStream is a data structure that stores media Buffers in ranges. | 5 // SourceBufferStream is a data structure that stores media Buffers in ranges. |
6 // Buffers can be appended out of presentation order. Buffers are retrieved by | 6 // Buffers can be appended out of presentation order. Buffers are retrieved by |
7 // seeking to the desired start point and calling GetNextBuffer(). Buffers are | 7 // seeking to the desired start point and calling GetNextBuffer(). Buffers are |
8 // returned in sequential presentation order. | 8 // returned in sequential presentation order. |
9 | 9 |
10 #ifndef MEDIA_FILTERS_SOURCE_BUFFER_STREAM_H_ | 10 #ifndef MEDIA_FILTERS_SOURCE_BUFFER_STREAM_H_ |
(...skipping 72 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
83 // Removes buffers between |start| and |end| according to the steps | 83 // Removes buffers between |start| and |end| according to the steps |
84 // in the "Coded Frame Removal Algorithm" in the Media Source | 84 // in the "Coded Frame Removal Algorithm" in the Media Source |
85 // Extensions Spec. | 85 // Extensions Spec. |
86 // https://dvcs.w3.org/hg/html-media/raw-file/default/media-source/media-sourc
e.html#sourcebuffer-coded-frame-removal | 86 // https://dvcs.w3.org/hg/html-media/raw-file/default/media-source/media-sourc
e.html#sourcebuffer-coded-frame-removal |
87 // | 87 // |
88 // |duration| is the current duration of the presentation. It is | 88 // |duration| is the current duration of the presentation. It is |
89 // required by the computation outlined in the spec. | 89 // required by the computation outlined in the spec. |
90 void Remove(base::TimeDelta start, base::TimeDelta end, | 90 void Remove(base::TimeDelta start, base::TimeDelta end, |
91 base::TimeDelta duration); | 91 base::TimeDelta duration); |
92 | 92 |
| 93 // Frees up space if the SourceBufferStream is taking up too much memory. |
| 94 // |media_time| is current playback position. |
| 95 bool GarbageCollectIfNeeded(DecodeTimestamp media_time, |
| 96 size_t newDataSize); |
| 97 |
93 // Changes the SourceBufferStream's state so that it will start returning | 98 // Changes the SourceBufferStream's state so that it will start returning |
94 // buffers starting from the closest keyframe before |timestamp|. | 99 // buffers starting from the closest keyframe before |timestamp|. |
95 void Seek(base::TimeDelta timestamp); | 100 void Seek(base::TimeDelta timestamp); |
96 | 101 |
97 // Returns true if the SourceBufferStream has seeked to a time without | 102 // Returns true if the SourceBufferStream has seeked to a time without |
98 // buffered data and is waiting for more data to be appended. | 103 // buffered data and is waiting for more data to be appended. |
99 bool IsSeekPending() const; | 104 bool IsSeekPending() const; |
100 | 105 |
101 // Notifies the SourceBufferStream that the media duration has been changed to | 106 // Notifies the SourceBufferStream that the media duration has been changed to |
102 // |duration| so it should drop any data past that point. | 107 // |duration| so it should drop any data past that point. |
(...skipping 10 matching lines...) Expand all Loading... |
113 Status GetNextBuffer(scoped_refptr<StreamParserBuffer>* out_buffer); | 118 Status GetNextBuffer(scoped_refptr<StreamParserBuffer>* out_buffer); |
114 | 119 |
115 // Returns a list of the buffered time ranges. | 120 // Returns a list of the buffered time ranges. |
116 Ranges<base::TimeDelta> GetBufferedTime() const; | 121 Ranges<base::TimeDelta> GetBufferedTime() const; |
117 | 122 |
118 // Returns the duration of the buffered ranges, which is equivalent | 123 // Returns the duration of the buffered ranges, which is equivalent |
119 // to the end timestamp of the last buffered range. If no data is buffered | 124 // to the end timestamp of the last buffered range. If no data is buffered |
120 // then base::TimeDelta() is returned. | 125 // then base::TimeDelta() is returned. |
121 base::TimeDelta GetBufferedDuration() const; | 126 base::TimeDelta GetBufferedDuration() const; |
122 | 127 |
| 128 // Returns the size of the buffered data in bytes. |
| 129 size_t GetBufferedSize() const; |
| 130 |
123 // Notifies this object that end of stream has been signalled. | 131 // Notifies this object that end of stream has been signalled. |
124 void MarkEndOfStream(); | 132 void MarkEndOfStream(); |
125 | 133 |
126 // Clear the end of stream state set by MarkEndOfStream(). | 134 // Clear the end of stream state set by MarkEndOfStream(). |
127 void UnmarkEndOfStream(); | 135 void UnmarkEndOfStream(); |
128 | 136 |
129 const AudioDecoderConfig& GetCurrentAudioDecoderConfig(); | 137 const AudioDecoderConfig& GetCurrentAudioDecoderConfig(); |
130 const VideoDecoderConfig& GetCurrentVideoDecoderConfig(); | 138 const VideoDecoderConfig& GetCurrentVideoDecoderConfig(); |
131 const TextTrackConfig& GetCurrentTextTrackConfig(); | 139 const TextTrackConfig& GetCurrentTextTrackConfig(); |
132 | 140 |
(...skipping 10 matching lines...) Expand all Loading... |
143 // yet. | 151 // yet. |
144 base::TimeDelta GetMaxInterbufferDistance() const; | 152 base::TimeDelta GetMaxInterbufferDistance() const; |
145 | 153 |
146 void set_memory_limit(size_t memory_limit) { | 154 void set_memory_limit(size_t memory_limit) { |
147 memory_limit_ = memory_limit; | 155 memory_limit_ = memory_limit; |
148 } | 156 } |
149 | 157 |
150 private: | 158 private: |
151 friend class SourceBufferStreamTest; | 159 friend class SourceBufferStreamTest; |
152 | 160 |
153 // Frees up space if the SourceBufferStream is taking up too much memory. | |
154 void GarbageCollectIfNeeded(); | |
155 | |
156 // Attempts to delete approximately |total_bytes_to_free| amount of data | 161 // Attempts to delete approximately |total_bytes_to_free| amount of data |
157 // |ranges_|, starting at the front of |ranges_| and moving linearly forward | 162 // |ranges_|, starting at the front of |ranges_| and moving linearly forward |
158 // through the buffers. Deletes starting from the back if |reverse_direction| | 163 // through the buffers. Deletes starting from the back if |reverse_direction| |
159 // is true. Returns the number of bytes freed. | 164 // is true. |media_time| is current playback position. |
160 size_t FreeBuffers(size_t total_bytes_to_free, bool reverse_direction); | 165 // Returns the number of bytes freed. |
| 166 size_t FreeBuffers(size_t total_bytes_to_free, |
| 167 DecodeTimestamp media_time, |
| 168 bool reverse_direction); |
161 | 169 |
162 // Attempts to delete approximately |total_bytes_to_free| amount of data from | 170 // Attempts to delete approximately |total_bytes_to_free| amount of data from |
163 // |ranges_|, starting after the last appended buffer before the current | 171 // |ranges_|, starting after the last appended buffer before the current |
164 // playback position. | 172 // playback position |media_time|. |
165 size_t FreeBuffersAfterLastAppended(size_t total_bytes_to_free); | 173 size_t FreeBuffersAfterLastAppended(size_t total_bytes_to_free, |
| 174 DecodeTimestamp media_time); |
166 | 175 |
167 // Gets the removal range to secure |byte_to_free| from | 176 // Gets the removal range to secure |byte_to_free| from |
168 // [|start_timestamp|, |end_timestamp|). | 177 // [|start_timestamp|, |end_timestamp|). |
169 // Returns the size of buffers to secure if future | 178 // Returns the size of buffers to secure if future |
170 // Remove(|start_timestamp|, |removal_end_timestamp|, duration) is called. | 179 // Remove(|start_timestamp|, |removal_end_timestamp|, duration) is called. |
171 // Will not update |removal_end_timestamp| if the returned size is 0. | 180 // Will not update |removal_end_timestamp| if the returned size is 0. |
172 size_t GetRemovalRange(DecodeTimestamp start_timestamp, | 181 size_t GetRemovalRange(DecodeTimestamp start_timestamp, |
173 DecodeTimestamp end_timestamp, size_t byte_to_free, | 182 DecodeTimestamp end_timestamp, size_t byte_to_free, |
174 DecodeTimestamp* removal_end_timestamp); | 183 DecodeTimestamp* removal_end_timestamp); |
175 | 184 |
(...skipping 260 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
436 int num_splice_generation_warning_logs_ = 0; | 445 int num_splice_generation_warning_logs_ = 0; |
437 int num_splice_generation_success_logs_ = 0; | 446 int num_splice_generation_success_logs_ = 0; |
438 int num_track_buffer_gap_warning_logs_ = 0; | 447 int num_track_buffer_gap_warning_logs_ = 0; |
439 | 448 |
440 DISALLOW_COPY_AND_ASSIGN(SourceBufferStream); | 449 DISALLOW_COPY_AND_ASSIGN(SourceBufferStream); |
441 }; | 450 }; |
442 | 451 |
443 } // namespace media | 452 } // namespace media |
444 | 453 |
445 #endif // MEDIA_FILTERS_SOURCE_BUFFER_STREAM_H_ | 454 #endif // MEDIA_FILTERS_SOURCE_BUFFER_STREAM_H_ |
OLD | NEW |