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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 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_RENDERER_H_ | 5 #ifndef MEDIA_BASE_RENDERER_H_ |
6 #define MEDIA_BASE_RENDERER_H_ | 6 #define MEDIA_BASE_RENDERER_H_ |
7 | 7 |
8 #include <vector> | |
9 | |
10 #include "base/callback.h" | 8 #include "base/callback.h" |
11 #include "base/macros.h" | 9 #include "base/macros.h" |
12 #include "base/memory/ref_counted.h" | 10 #include "base/memory/ref_counted.h" |
13 #include "base/time/time.h" | 11 #include "base/time/time.h" |
14 #include "media/base/buffering_state.h" | 12 #include "media/base/buffering_state.h" |
15 #include "media/base/cdm_context.h" | 13 #include "media/base/cdm_context.h" |
16 #include "media/base/media_export.h" | 14 #include "media/base/media_export.h" |
17 #include "media/base/pipeline_status.h" | 15 #include "media/base/pipeline_status.h" |
18 | 16 |
19 namespace media { | 17 namespace media { |
20 | 18 |
21 class DemuxerStream; | |
22 class DemuxerStreamProvider; | 19 class DemuxerStreamProvider; |
23 class VideoFrame; | 20 class VideoFrame; |
24 | 21 |
25 class MEDIA_EXPORT Renderer { | 22 class MEDIA_EXPORT Renderer { |
26 public: | 23 public: |
27 Renderer(); | 24 Renderer(); |
28 | 25 |
29 // Stops rendering and fires any pending callbacks. | 26 // Stops rendering and fires any pending callbacks. |
30 virtual ~Renderer(); | 27 virtual ~Renderer(); |
31 | 28 |
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73 | 70 |
74 // Returns the current media time. | 71 // Returns the current media time. |
75 virtual base::TimeDelta GetMediaTime() = 0; | 72 virtual base::TimeDelta GetMediaTime() = 0; |
76 | 73 |
77 // Returns whether |this| renders audio. | 74 // Returns whether |this| renders audio. |
78 virtual bool HasAudio() = 0; | 75 virtual bool HasAudio() = 0; |
79 | 76 |
80 // Returns whether |this| renders video. | 77 // Returns whether |this| renders video. |
81 virtual bool HasVideo() = 0; | 78 virtual bool HasVideo() = 0; |
82 | 79 |
83 // TODO(servolk,wolenetz): Enable media track handling in mojo, then make sure | |
84 // OnEnabledAudioStreamsChanged and OnSelectedVideoStreamChanged are | |
85 // implemented by all media renderers and make them pure virtual here. | |
86 // crbug.com/604083 | |
87 | |
88 // Notifies renderer that the set of enabled audio streams/tracks has changed. | |
89 // The input parameter |enabledAudioStreams| might be empty, which means that | |
90 // all audio tracks should be disabled/muted. | |
91 virtual void OnEnabledAudioStreamsChanged( | |
92 const std::vector<const DemuxerStream*>& enabledAudioStreams) {} | |
93 | |
94 // Notifies renderer that the selected video stream has changed. The input | |
95 // parameter |selectedVideoStream| can be null, which means video is disabled. | |
96 virtual void OnSelectedVideoStreamChanged( | |
97 const DemuxerStream* selectedVideoStream) {} | |
98 | |
99 private: | 80 private: |
100 DISALLOW_COPY_AND_ASSIGN(Renderer); | 81 DISALLOW_COPY_AND_ASSIGN(Renderer); |
101 }; | 82 }; |
102 | 83 |
103 } // namespace media | 84 } // namespace media |
104 | 85 |
105 #endif // MEDIA_BASE_RENDERER_H_ | 86 #endif // MEDIA_BASE_RENDERER_H_ |
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