media/base/clock.h - Issue 165163: Merge 21882 - Implemented a proper clock for audio/video synchronization....

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Side by Side Diff: media/base/clock.h

Issue 165163: Merge 21882 - Implemented a proper clock for audio/video synchronization.... (Closed) Base URL: svn://chrome-svn/chrome/branches/195/src/

Patch Set: Created 11 years, 4 months ago

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Added: svn:mergeinfo
Merged /trunk/src/media/base/clock.h:r21882

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1 // Copyright (c) 2009 The Chromium Authors. All rights reserved.	1 // Copyright (c) 2009 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 // A clock represent a single source of time to allow audio and video streams	5 // A clock represent a single source of time to allow audio and video streams

6 // to synchronize with each other. Clocks essentially track the media time with	6 // to synchronize with each other. Clocks essentially track the media time with

7 // respect to some other source of time, whether that may be the system clock,	7 // respect to some other source of time, whether that may be the system clock,

8 // audio hardware or some other OS-level API.	8 // audio hardware or some other OS-level API.

9 //	9 //

10 // Clocks start off paused with a playback rate of 1.0f and a media time of 0.	10 // Clocks start off paused with a playback rate of 1.0f and a media time of 0.

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38 // where a discontinuity in the media is found (i.e., seeking).	38 // where a discontinuity in the media is found (i.e., seeking).

39 virtual void SetTime(const base::TimeDelta& time) = 0;	39 virtual void SetTime(const base::TimeDelta& time) = 0;

40	40

41 // Returns the current elapsed media time.	41 // Returns the current elapsed media time.

42 virtual base::TimeDelta Elapsed() const = 0;	42 virtual base::TimeDelta Elapsed() const = 0;

43 };	43 };

44	44

45 } // namespace media	45 } // namespace media

46	46

47 #endif // MEDIA_BASE_CLOCK_H_	47 #endif // MEDIA_BASE_CLOCK_H_

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