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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_TIME_DELTA_INTERPOLATOR_H_ | 5 #ifndef MEDIA_BASE_TIME_DELTA_INTERPOLATOR_H_ |
6 #define MEDIA_BASE_TIME_DELTA_INTERPOLATOR_H_ | 6 #define MEDIA_BASE_TIME_DELTA_INTERPOLATOR_H_ |
7 | 7 |
8 #include "base/macros.h" | 8 #include "base/macros.h" |
9 #include "base/time/time.h" | 9 #include "base/time/time.h" |
10 #include "media/base/media_export.h" | 10 #include "media/base/media_export.h" |
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43 // The default rate is 0. | 43 // The default rate is 0. |
44 // | 44 // |
45 // |tick_clock| will be queried for a new reference time value. | 45 // |tick_clock| will be queried for a new reference time value. |
46 void SetPlaybackRate(double playback_rate); | 46 void SetPlaybackRate(double playback_rate); |
47 | 47 |
48 // Sets the two timestamps to interpolate between at |playback_rate_|. | 48 // Sets the two timestamps to interpolate between at |playback_rate_|. |
49 // |upper_bound| must be greater or equal to |lower_bound|. | 49 // |upper_bound| must be greater or equal to |lower_bound|. |
50 // | 50 // |
51 // |upper_bound| is typically the media timestamp of the last audio frame | 51 // |upper_bound| is typically the media timestamp of the last audio frame |
52 // buffered by the audio hardware. | 52 // buffered by the audio hardware. |
53 void SetBounds(base::TimeDelta lower_bound, base::TimeDelta upper_bound); | 53 void SetBounds(base::TimeDelta lower_bound, |
| 54 base::TimeDelta upper_bound, |
| 55 base::TimeTicks capture_time); |
54 | 56 |
55 // Sets the upper bound used for interpolation. Note that if |upper_bound| is | 57 // Sets the upper bound used for interpolation. Note that if |upper_bound| is |
56 // less than what was previously set via SetTime(), then all future calls | 58 // less than what was previously set via SetTime(), then all future calls |
57 // to GetInterpolatedTime() will return |upper_bound|. | 59 // to GetInterpolatedTime() will return |upper_bound|. |
58 void SetUpperBound(base::TimeDelta upper_bound); | 60 void SetUpperBound(base::TimeDelta upper_bound); |
59 | 61 |
60 // Computes an interpolated time based on SetTime(). | 62 // Computes an interpolated time based on SetTime(). |
61 base::TimeDelta GetInterpolatedTime(); | 63 base::TimeDelta GetInterpolatedTime(); |
62 | 64 |
63 private: | 65 private: |
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74 base::TimeTicks reference_; | 76 base::TimeTicks reference_; |
75 | 77 |
76 double playback_rate_; | 78 double playback_rate_; |
77 | 79 |
78 DISALLOW_COPY_AND_ASSIGN(TimeDeltaInterpolator); | 80 DISALLOW_COPY_AND_ASSIGN(TimeDeltaInterpolator); |
79 }; | 81 }; |
80 | 82 |
81 } // namespace media | 83 } // namespace media |
82 | 84 |
83 #endif // MEDIA_BASE_TIME_DELTA_INTERPOLATOR_H_ | 85 #endif // MEDIA_BASE_TIME_DELTA_INTERPOLATOR_H_ |
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