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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_DEMUXER_H_ | 5 #ifndef MEDIA_BASE_DEMUXER_H_ |
6 #define MEDIA_BASE_DEMUXER_H_ | 6 #define MEDIA_BASE_DEMUXER_H_ |
7 | 7 |
8 #include "base/memory/ref_counted.h" | 8 #include "base/memory/ref_counted.h" |
9 #include "base/time.h" | 9 #include "base/time.h" |
10 #include "media/base/data_source.h" | 10 #include "media/base/data_source.h" |
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27 virtual void SetBufferedTime(base::TimeDelta buffered_time) = 0; | 27 virtual void SetBufferedTime(base::TimeDelta buffered_time) = 0; |
28 | 28 |
29 // Sets the byte offset at which the client is requesting the video. | 29 // Sets the byte offset at which the client is requesting the video. |
30 virtual void SetCurrentReadPosition(int64 offset) = 0; | 30 virtual void SetCurrentReadPosition(int64 offset) = 0; |
31 | 31 |
32 // Stops execution of the pipeline due to a fatal error. Do not call this | 32 // Stops execution of the pipeline due to a fatal error. Do not call this |
33 // method with PIPELINE_OK. | 33 // method with PIPELINE_OK. |
34 virtual void OnDemuxerError(PipelineStatus error) = 0; | 34 virtual void OnDemuxerError(PipelineStatus error) = 0; |
35 }; | 35 }; |
36 | 36 |
37 class MEDIA_EXPORT Demuxer | 37 class MEDIA_EXPORT Demuxer : public base::RefCountedThreadSafe<Demuxer> { |
38 : public base::RefCountedThreadSafe<Demuxer> { | |
39 public: | 38 public: |
40 Demuxer(); | 39 Demuxer(); |
41 | 40 |
42 // Sets the private member |host_|. This is the first method called by | |
43 // the DemuxerHost after a demuxer is created. The host holds a strong | |
44 // reference to the demuxer. The reference held by the host is guaranteed | |
45 // to be released before the host object is destroyed by the pipeline. | |
46 virtual void set_host(DemuxerHost* host); | |
47 | |
48 // Completes initialization of the demuxer. | 41 // Completes initialization of the demuxer. |
49 // | 42 // |
50 // TODO(scherkus): pass in DemuxerHost here instead of using set_host(), | 43 // The demuxer does not own |host| as it is guaranteed to outlive the |
51 // see http://crbug.com/111585 | 44 // lifetime of the demuxer. Don't delete it! |
52 virtual void Initialize(const PipelineStatusCB& status_cb) = 0; | 45 virtual void Initialize(DemuxerHost* host, |
| 46 const PipelineStatusCB& status_cb) = 0; |
53 | 47 |
54 // The pipeline playback rate has been changed. Demuxers may implement this | 48 // The pipeline playback rate has been changed. Demuxers may implement this |
55 // method if they need to respond to this call. | 49 // method if they need to respond to this call. |
56 virtual void SetPlaybackRate(float playback_rate); | 50 virtual void SetPlaybackRate(float playback_rate); |
57 | 51 |
58 // Carry out any actions required to seek to the given time, executing the | 52 // Carry out any actions required to seek to the given time, executing the |
59 // callback upon completion. | 53 // callback upon completion. |
60 virtual void Seek(base::TimeDelta time, const PipelineStatusCB& status_cb); | 54 virtual void Seek(base::TimeDelta time, const PipelineStatusCB& status_cb); |
61 | 55 |
62 // The pipeline is being stopped either as a result of an error or because | 56 // The pipeline is being stopped either as a result of an error or because |
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83 // Returns true if the source is from a local file or stream (such as a | 77 // Returns true if the source is from a local file or stream (such as a |
84 // webcam stream), false otherwise. | 78 // webcam stream), false otherwise. |
85 // | 79 // |
86 // TODO(scherkus): See http://crbug.com/120426 on why we should remove this. | 80 // TODO(scherkus): See http://crbug.com/120426 on why we should remove this. |
87 virtual bool IsLocalSource() = 0; | 81 virtual bool IsLocalSource() = 0; |
88 | 82 |
89 // Returns true if seeking is possible; false otherwise. | 83 // Returns true if seeking is possible; false otherwise. |
90 virtual bool IsSeekable() = 0; | 84 virtual bool IsSeekable() = 0; |
91 | 85 |
92 protected: | 86 protected: |
93 // Only allow derived objects access to the DemuxerHost. This is | |
94 // kept out of the public interface because demuxers need to be | |
95 // aware of all calls made to the host object so they can insure | |
96 // the state presented to the host is always consistent with its own | |
97 // state. | |
98 DemuxerHost* host() { return host_; } | |
99 | |
100 friend class base::RefCountedThreadSafe<Demuxer>; | 87 friend class base::RefCountedThreadSafe<Demuxer>; |
101 virtual ~Demuxer(); | 88 virtual ~Demuxer(); |
102 | 89 |
103 private: | 90 private: |
104 DemuxerHost* host_; | |
105 | |
106 DISALLOW_COPY_AND_ASSIGN(Demuxer); | 91 DISALLOW_COPY_AND_ASSIGN(Demuxer); |
107 }; | 92 }; |
108 | 93 |
109 } // namespace media | 94 } // namespace media |
110 | 95 |
111 #endif // MEDIA_BASE_DEMUXER_H_ | 96 #endif // MEDIA_BASE_DEMUXER_H_ |
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