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1 // Copyright 2011 The Chromium Authors. All rights reserved. | 1 // Copyright 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 #ifndef CC_SCHEDULER_FRAME_RATE_CONTROLLER_H_ | 5 #ifndef CC_SCHEDULER_FRAME_RATE_CONTROLLER_H_ |
6 #define CC_SCHEDULER_FRAME_RATE_CONTROLLER_H_ | 6 #define CC_SCHEDULER_FRAME_RATE_CONTROLLER_H_ |
7 | 7 |
8 #include "base/memory/ref_counted.h" | 8 #include "base/memory/ref_counted.h" |
9 #include "base/memory/scoped_ptr.h" | 9 #include "base/memory/scoped_ptr.h" |
10 #include "base/memory/weak_ptr.h" | 10 #include "base/memory/weak_ptr.h" |
11 #include "base/time.h" | 11 #include "base/time.h" |
12 #include "cc/base/cc_export.h" | 12 #include "cc/base/cc_export.h" |
13 | 13 |
| 14 namespace base { class SingleThreadTaskRunner; } |
| 15 |
14 namespace cc { | 16 namespace cc { |
15 | 17 |
16 class Thread; | |
17 class TimeSource; | 18 class TimeSource; |
18 class FrameRateController; | 19 class FrameRateController; |
19 | 20 |
20 class CC_EXPORT FrameRateControllerClient { | 21 class CC_EXPORT FrameRateControllerClient { |
21 protected: | 22 protected: |
22 virtual ~FrameRateControllerClient() {} | 23 virtual ~FrameRateControllerClient() {} |
23 | 24 |
24 public: | 25 public: |
25 // Throttled is true when we have a maximum number of frames pending. | 26 // Throttled is true when we have a maximum number of frames pending. |
26 virtual void FrameRateControllerTick(bool throttled) = 0; | 27 virtual void FrameRateControllerTick(bool throttled) = 0; |
27 }; | 28 }; |
28 | 29 |
29 class FrameRateControllerTimeSourceAdapter; | 30 class FrameRateControllerTimeSourceAdapter; |
30 | 31 |
31 // The FrameRateController is used in cases where we self-tick (i.e. BeginFrame | 32 // The FrameRateController is used in cases where we self-tick (i.e. BeginFrame |
32 // is not sent by a parent compositor. | 33 // is not sent by a parent compositor. |
33 class CC_EXPORT FrameRateController { | 34 class CC_EXPORT FrameRateController { |
34 public: | 35 public: |
35 enum { | 36 enum { |
36 DEFAULT_MAX_FRAMES_PENDING = 2 | 37 DEFAULT_MAX_FRAMES_PENDING = 2 |
37 }; | 38 }; |
38 | 39 |
39 explicit FrameRateController(scoped_refptr<TimeSource> timer); | 40 explicit FrameRateController(scoped_refptr<TimeSource> timer); |
40 // Alternate form of FrameRateController with unthrottled frame-rate. | 41 // Alternate form of FrameRateController with unthrottled frame-rate. |
41 explicit FrameRateController(Thread* thread); | 42 explicit FrameRateController(base::SingleThreadTaskRunner* task_runner); |
42 virtual ~FrameRateController(); | 43 virtual ~FrameRateController(); |
43 | 44 |
44 void SetClient(FrameRateControllerClient* client) { client_ = client; } | 45 void SetClient(FrameRateControllerClient* client) { client_ = client; } |
45 | 46 |
46 void SetActive(bool active); | 47 void SetActive(bool active); |
47 bool IsActive() { return active_; } | 48 bool IsActive() { return active_; } |
48 | 49 |
49 // Use the following methods to adjust target frame rate. | 50 // Use the following methods to adjust target frame rate. |
50 // | 51 // |
51 // Multiple frames can be in-progress, but for every DidSwapBuffers, a | 52 // Multiple frames can be in-progress, but for every DidSwapBuffers, a |
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78 FrameRateControllerClient* client_; | 79 FrameRateControllerClient* client_; |
79 int num_frames_pending_; | 80 int num_frames_pending_; |
80 int max_swaps_pending_; | 81 int max_swaps_pending_; |
81 scoped_refptr<TimeSource> time_source_; | 82 scoped_refptr<TimeSource> time_source_; |
82 scoped_ptr<FrameRateControllerTimeSourceAdapter> time_source_client_adapter_; | 83 scoped_ptr<FrameRateControllerTimeSourceAdapter> time_source_client_adapter_; |
83 bool active_; | 84 bool active_; |
84 | 85 |
85 // Members for unthrottled frame-rate. | 86 // Members for unthrottled frame-rate. |
86 bool is_time_source_throttling_; | 87 bool is_time_source_throttling_; |
87 base::WeakPtrFactory<FrameRateController> weak_factory_; | 88 base::WeakPtrFactory<FrameRateController> weak_factory_; |
88 Thread* thread_; | 89 base::SingleThreadTaskRunner* task_runner_; |
89 | 90 |
90 private: | 91 private: |
91 DISALLOW_COPY_AND_ASSIGN(FrameRateController); | 92 DISALLOW_COPY_AND_ASSIGN(FrameRateController); |
92 }; | 93 }; |
93 | 94 |
94 } // namespace cc | 95 } // namespace cc |
95 | 96 |
96 #endif // CC_SCHEDULER_FRAME_RATE_CONTROLLER_H_ | 97 #endif // CC_SCHEDULER_FRAME_RATE_CONTROLLER_H_ |
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