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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 #include "media/base/wall_clock_time_source.h" | 5 #include "media/base/wall_clock_time_source.h" |
6 | 6 |
7 #include "base/logging.h" | 7 #include "base/logging.h" |
8 #include "base/time/default_tick_clock.h" | 8 #include "base/time/default_tick_clock.h" |
9 | 9 |
10 namespace media { | 10 namespace media { |
11 | 11 |
12 WallClockTimeSource::WallClockTimeSource() | 12 WallClockTimeSource::WallClockTimeSource() |
13 : tick_clock_(new base::DefaultTickClock()), | 13 : tick_clock_(new base::DefaultTickClock()), |
14 ticking_(false), | 14 ticking_(false), |
15 playback_rate_(1.0f) { | 15 playback_rate_(1.0f) { |
16 } | 16 } |
17 | 17 |
18 WallClockTimeSource::~WallClockTimeSource() { | 18 WallClockTimeSource::~WallClockTimeSource() { |
19 } | 19 } |
20 | 20 |
21 void WallClockTimeSource::StartTicking() { | 21 void WallClockTimeSource::StartTicking() { |
| 22 DVLOG(1) << __FUNCTION__; |
22 base::AutoLock auto_lock(lock_); | 23 base::AutoLock auto_lock(lock_); |
23 DCHECK(!ticking_); | 24 DCHECK(!ticking_); |
24 ticking_ = true; | 25 ticking_ = true; |
25 reference_wall_ticks_ = tick_clock_->NowTicks(); | 26 reference_wall_ticks_ = tick_clock_->NowTicks(); |
26 } | 27 } |
27 | 28 |
28 void WallClockTimeSource::StopTicking() { | 29 void WallClockTimeSource::StopTicking() { |
| 30 DVLOG(1) << __FUNCTION__; |
29 base::AutoLock auto_lock(lock_); | 31 base::AutoLock auto_lock(lock_); |
30 DCHECK(ticking_); | 32 DCHECK(ticking_); |
31 base_time_ = CurrentMediaTime_Locked(); | 33 base_time_ = CurrentMediaTime_Locked(); |
32 ticking_ = false; | 34 ticking_ = false; |
33 reference_wall_ticks_ = tick_clock_->NowTicks(); | 35 reference_wall_ticks_ = tick_clock_->NowTicks(); |
34 } | 36 } |
35 | 37 |
36 void WallClockTimeSource::SetPlaybackRate(float playback_rate) { | 38 void WallClockTimeSource::SetPlaybackRate(float playback_rate) { |
| 39 DVLOG(1) << __FUNCTION__ << "(" << playback_rate << ")"; |
37 base::AutoLock auto_lock(lock_); | 40 base::AutoLock auto_lock(lock_); |
38 // Estimate current media time using old rate to use as a new base time for | 41 // Estimate current media time using old rate to use as a new base time for |
39 // the new rate. | 42 // the new rate. |
40 if (ticking_) { | 43 if (ticking_) { |
41 base_time_ = CurrentMediaTime_Locked(); | 44 base_time_ = CurrentMediaTime_Locked(); |
42 reference_wall_ticks_ = tick_clock_->NowTicks(); | 45 reference_wall_ticks_ = tick_clock_->NowTicks(); |
43 } | 46 } |
44 | 47 |
45 playback_rate_ = playback_rate; | 48 playback_rate_ = playback_rate; |
46 } | 49 } |
47 | 50 |
48 void WallClockTimeSource::SetMediaTime(base::TimeDelta time) { | 51 void WallClockTimeSource::SetMediaTime(base::TimeDelta time) { |
| 52 DVLOG(1) << __FUNCTION__ << "(" << time.InMicroseconds() << ")"; |
49 base::AutoLock auto_lock(lock_); | 53 base::AutoLock auto_lock(lock_); |
50 CHECK(!ticking_); | 54 CHECK(!ticking_); |
51 base_time_ = time; | 55 base_time_ = time; |
52 } | 56 } |
53 | 57 |
54 base::TimeDelta WallClockTimeSource::CurrentMediaTime() { | 58 base::TimeDelta WallClockTimeSource::CurrentMediaTime() { |
55 base::AutoLock auto_lock(lock_); | 59 base::AutoLock auto_lock(lock_); |
56 return CurrentMediaTime_Locked(); | 60 return CurrentMediaTime_Locked(); |
57 } | 61 } |
58 | 62 |
(...skipping 11 matching lines...) Expand all Loading... |
70 if (!ticking_) | 74 if (!ticking_) |
71 return base_time_; | 75 return base_time_; |
72 | 76 |
73 base::TimeTicks now = tick_clock_->NowTicks(); | 77 base::TimeTicks now = tick_clock_->NowTicks(); |
74 return base_time_ + | 78 return base_time_ + |
75 base::TimeDelta::FromMicroseconds( | 79 base::TimeDelta::FromMicroseconds( |
76 (now - reference_wall_ticks_).InMicroseconds() * playback_rate_); | 80 (now - reference_wall_ticks_).InMicroseconds() * playback_rate_); |
77 } | 81 } |
78 | 82 |
79 } // namespace media | 83 } // namespace media |
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