blob: 6d86d97496679c4efb629c8b8e5b7dadacf405bd (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
// Copyright 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CC_SCHEDULER_FRAME_RATE_CONTROLLER_H_
#define CC_SCHEDULER_FRAME_RATE_CONTROLLER_H_
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/time/time.h"
#include "cc/base/cc_export.h"
#include "cc/output/begin_frame_args.h"
namespace base { class SingleThreadTaskRunner; }
namespace cc {
class TimeSource;
class FrameRateController;
class CC_EXPORT FrameRateControllerClient {
protected:
virtual ~FrameRateControllerClient() {}
public:
// Throttled is true when we have a maximum number of frames pending.
virtual void FrameRateControllerTick(bool throttled,
const BeginFrameArgs& args) = 0;
};
class FrameRateControllerTimeSourceAdapter;
// The FrameRateController is used in cases where we self-tick (i.e. BeginFrame
// is not sent by a parent compositor.
class CC_EXPORT FrameRateController {
public:
explicit FrameRateController(scoped_refptr<TimeSource> timer);
// Alternate form of FrameRateController with unthrottled frame-rate.
explicit FrameRateController(base::SingleThreadTaskRunner* task_runner);
virtual ~FrameRateController();
void SetClient(FrameRateControllerClient* client) { client_ = client; }
// Returns a valid BeginFrame on activation to potentially be used
// retroactively.
BeginFrameArgs SetActive(bool active);
bool IsActive() { return active_; }
// Use the following methods to adjust target frame rate.
//
// Multiple frames can be in-progress, but for every DidSwapBuffers, a
// DidFinishFrame should be posted.
//
// If the rendering pipeline crashes, call DidAbortAllPendingFrames.
void DidSwapBuffers();
void DidSwapBuffersComplete();
void DidAbortAllPendingFrames();
void SetMaxSwapsPending(int max_swaps_pending); // 0 for unlimited.
int MaxSwapsPending() const { return max_swaps_pending_; }
int NumSwapsPendingForTesting() const { return num_frames_pending_; }
void SetTimebaseAndInterval(base::TimeTicks timebase,
base::TimeDelta interval);
void SetDeadlineAdjustment(base::TimeDelta delta);
protected:
friend class FrameRateControllerTimeSourceAdapter;
void OnTimerTick();
void PostManualTick();
void ManualTick();
// This returns null for unthrottled frame-rate.
base::TimeTicks NextTickTime();
// This returns now for unthrottled frame-rate.
base::TimeTicks LastTickTime();
FrameRateControllerClient* client_;
int num_frames_pending_;
int max_swaps_pending_;
base::TimeDelta interval_;
base::TimeDelta deadline_adjustment_;
scoped_refptr<TimeSource> time_source_;
scoped_ptr<FrameRateControllerTimeSourceAdapter> time_source_client_adapter_;
bool active_;
// Members for unthrottled frame-rate.
bool is_time_source_throttling_;
bool manual_tick_pending_;
base::SingleThreadTaskRunner* task_runner_;
base::WeakPtrFactory<FrameRateController> weak_factory_;
private:
DISALLOW_COPY_AND_ASSIGN(FrameRateController);
};
} // namespace cc
#endif // CC_SCHEDULER_FRAME_RATE_CONTROLLER_H_
|
