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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_DATA_SOURCE_H_ | 5 #ifndef MEDIA_BASE_DATA_SOURCE_H_ |
6 #define MEDIA_BASE_DATA_SOURCE_H_ | 6 #define MEDIA_BASE_DATA_SOURCE_H_ |
7 | 7 |
8 #include <stdint.h> | 8 #include <stdint.h> |
9 | 9 |
10 #include "base/callback.h" | 10 #include "base/callback.h" |
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29 // kReadError in case of error. | 29 // kReadError in case of error. |
30 virtual void Read(int64_t position, | 30 virtual void Read(int64_t position, |
31 int size, | 31 int size, |
32 uint8_t* data, | 32 uint8_t* data, |
33 const DataSource::ReadCB& read_cb) = 0; | 33 const DataSource::ReadCB& read_cb) = 0; |
34 | 34 |
35 // Stops the DataSource. Once this is called all future Read() calls will | 35 // Stops the DataSource. Once this is called all future Read() calls will |
36 // return an error. | 36 // return an error. |
37 virtual void Stop() = 0; | 37 virtual void Stop() = 0; |
38 | 38 |
| 39 // Similar to Stop(), but only aborts current reads and not future reads. |
| 40 virtual void Abort() = 0; |
| 41 |
39 // Returns true and the file size, false if the file size could not be | 42 // Returns true and the file size, false if the file size could not be |
40 // retrieved. | 43 // retrieved. |
41 virtual bool GetSize(int64_t* size_out) = 0; | 44 virtual bool GetSize(int64_t* size_out) = 0; |
42 | 45 |
43 // Returns true if we are performing streaming. In this case seeking is | 46 // Returns true if we are performing streaming. In this case seeking is |
44 // not possible. | 47 // not possible. |
45 virtual bool IsStreaming() = 0; | 48 virtual bool IsStreaming() = 0; |
46 | 49 |
47 // Notify the DataSource of the bitrate of the media. | 50 // Notify the DataSource of the bitrate of the media. |
48 // Values of |bitrate| <= 0 are invalid and should be ignored. | 51 // Values of |bitrate| <= 0 are invalid and should be ignored. |
49 virtual void SetBitrate(int bitrate) = 0; | 52 virtual void SetBitrate(int bitrate) = 0; |
50 | 53 |
51 private: | 54 private: |
52 DISALLOW_COPY_AND_ASSIGN(DataSource); | 55 DISALLOW_COPY_AND_ASSIGN(DataSource); |
53 }; | 56 }; |
54 | 57 |
55 } // namespace media | 58 } // namespace media |
56 | 59 |
57 #endif // MEDIA_BASE_DATA_SOURCE_H_ | 60 #endif // MEDIA_BASE_DATA_SOURCE_H_ |
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