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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 "base/callback.h" | 8 #include "base/callback.h" |
9 #include "base/time/time.h" | 9 #include "base/time/time.h" |
10 #include "media/base/media_export.h" | 10 #include "media/base/media_export.h" |
11 | 11 |
12 namespace media { | 12 namespace media { |
13 | 13 |
14 class MEDIA_EXPORT DataSource { | 14 class MEDIA_EXPORT DataSource { |
15 public: | 15 public: |
16 typedef base::Callback<void(int64, int64)> StatusCallback; | 16 typedef base::Callback<void(int64, int64)> StatusCallback; |
17 typedef base::Callback<void(int)> ReadCB; | 17 typedef base::Callback<void(int)> ReadCB; |
18 static const int kReadError; | 18 |
| 19 enum { kReadError = -1 }; |
19 | 20 |
20 DataSource(); | 21 DataSource(); |
21 virtual ~DataSource(); | 22 virtual ~DataSource(); |
22 | 23 |
23 // Reads |size| bytes from |position| into |data|. And when the read is done | 24 // Reads |size| bytes from |position| into |data|. And when the read is done |
24 // or failed, |read_cb| is called with the number of bytes read or | 25 // or failed, |read_cb| is called with the number of bytes read or |
25 // kReadError in case of error. | 26 // kReadError in case of error. |
26 virtual void Read(int64 position, int size, uint8* data, | 27 virtual void Read(int64 position, int size, uint8* data, |
27 const DataSource::ReadCB& read_cb) = 0; | 28 const DataSource::ReadCB& read_cb) = 0; |
28 | 29 |
(...skipping 13 matching lines...) Expand all Loading... |
42 // Values of |bitrate| <= 0 are invalid and should be ignored. | 43 // Values of |bitrate| <= 0 are invalid and should be ignored. |
43 virtual void SetBitrate(int bitrate) = 0; | 44 virtual void SetBitrate(int bitrate) = 0; |
44 | 45 |
45 private: | 46 private: |
46 DISALLOW_COPY_AND_ASSIGN(DataSource); | 47 DISALLOW_COPY_AND_ASSIGN(DataSource); |
47 }; | 48 }; |
48 | 49 |
49 } // namespace media | 50 } // namespace media |
50 | 51 |
51 #endif // MEDIA_BASE_DATA_SOURCE_H_ | 52 #endif // MEDIA_BASE_DATA_SOURCE_H_ |
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