OLD | NEW |
1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 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 // Defines various types of timestamped media buffers used for transporting | 5 // Defines various types of timestamped media buffers used for transporting |
6 // data between filters. Every buffer contains a timestamp in microseconds | 6 // data between filters. Every buffer contains a timestamp in microseconds |
7 // describing the relative position of the buffer within the media stream, and | 7 // describing the relative position of the buffer within the media stream, and |
8 // the duration in microseconds for the length of time the buffer will be | 8 // the duration in microseconds for the length of time the buffer will be |
9 // rendered. | 9 // rendered. |
10 // | 10 // |
(...skipping 12 matching lines...) Expand all Loading... |
23 // Duration*: 40000us 40000us 40000us ... 40000us | 23 // Duration*: 40000us 40000us 40000us ... 40000us |
24 // | 24 // |
25 // *25fps = 0.04s per frame = 40000us per frame | 25 // *25fps = 0.04s per frame = 40000us per frame |
26 | 26 |
27 #ifndef MEDIA_BASE_BUFFERS_H_ | 27 #ifndef MEDIA_BASE_BUFFERS_H_ |
28 #define MEDIA_BASE_BUFFERS_H_ | 28 #define MEDIA_BASE_BUFFERS_H_ |
29 | 29 |
30 #include "base/basictypes.h" | 30 #include "base/basictypes.h" |
31 #include "base/memory/ref_counted.h" | 31 #include "base/memory/ref_counted.h" |
32 #include "base/time.h" | 32 #include "base/time.h" |
| 33 #include "media/base/media_export.h" |
33 | 34 |
34 namespace media { | 35 namespace media { |
35 | 36 |
36 // Indicates an invalid or missing timestamp. | 37 // Indicates an invalid or missing timestamp. |
37 extern const base::TimeDelta kNoTimestamp; | 38 MEDIA_EXPORT extern const base::TimeDelta kNoTimestamp; |
38 | 39 |
39 class StreamSample : public base::RefCountedThreadSafe<StreamSample> { | 40 class MEDIA_EXPORT StreamSample |
| 41 : public base::RefCountedThreadSafe<StreamSample> { |
40 public: | 42 public: |
41 // Returns the timestamp of this buffer in microseconds. | 43 // Returns the timestamp of this buffer in microseconds. |
42 base::TimeDelta GetTimestamp() const { | 44 base::TimeDelta GetTimestamp() const { |
43 return timestamp_; | 45 return timestamp_; |
44 } | 46 } |
45 | 47 |
46 // Returns the duration of this buffer in microseconds. | 48 // Returns the duration of this buffer in microseconds. |
47 base::TimeDelta GetDuration() const { | 49 base::TimeDelta GetDuration() const { |
48 return duration_; | 50 return duration_; |
49 } | 51 } |
(...skipping 19 matching lines...) Expand all Loading... |
69 virtual ~StreamSample(); | 71 virtual ~StreamSample(); |
70 | 72 |
71 base::TimeDelta timestamp_; | 73 base::TimeDelta timestamp_; |
72 base::TimeDelta duration_; | 74 base::TimeDelta duration_; |
73 | 75 |
74 private: | 76 private: |
75 DISALLOW_COPY_AND_ASSIGN(StreamSample); | 77 DISALLOW_COPY_AND_ASSIGN(StreamSample); |
76 }; | 78 }; |
77 | 79 |
78 | 80 |
79 class Buffer : public StreamSample { | 81 class MEDIA_EXPORT Buffer : public StreamSample { |
80 public: | 82 public: |
81 // Returns a read only pointer to the buffer data. | 83 // Returns a read only pointer to the buffer data. |
82 virtual const uint8* GetData() const = 0; | 84 virtual const uint8* GetData() const = 0; |
83 | 85 |
84 // Returns the size of valid data in bytes. | 86 // Returns the size of valid data in bytes. |
85 virtual size_t GetDataSize() const = 0; | 87 virtual size_t GetDataSize() const = 0; |
86 | 88 |
87 // If there's no data in this buffer, it represents end of stream. | 89 // If there's no data in this buffer, it represents end of stream. |
88 virtual bool IsEndOfStream() const; | 90 virtual bool IsEndOfStream() const; |
89 | 91 |
90 protected: | 92 protected: |
91 virtual ~Buffer() {} | 93 virtual ~Buffer() {} |
92 }; | 94 }; |
93 | 95 |
94 } // namespace media | 96 } // namespace media |
95 | 97 |
96 #endif // MEDIA_BASE_BUFFERS_H_ | 98 #endif // MEDIA_BASE_BUFFERS_H_ |
OLD | NEW |