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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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_AUDIO_TIMESTAMP_HELPER_H_ | 5 #ifndef MEDIA_BASE_AUDIO_TIMESTAMP_HELPER_H_ |
| 6 #define MEDIA_BASE_AUDIO_TIMESTAMP_HELPER_H_ | 6 #define MEDIA_BASE_AUDIO_TIMESTAMP_HELPER_H_ |
| 7 | 7 |
| 8 #include <stdint.h> |
| 9 |
| 8 #include "base/macros.h" | 10 #include "base/macros.h" |
| 9 #include "base/time/time.h" | 11 #include "base/time/time.h" |
| 10 #include "media/base/media_export.h" | 12 #include "media/base/media_export.h" |
| 11 | 13 |
| 12 namespace media { | 14 namespace media { |
| 13 | 15 |
| 14 // Generates timestamps for a sequence of audio sample frames. This class should | 16 // Generates timestamps for a sequence of audio sample frames. This class should |
| 15 // be used any place timestamps need to be calculated for a sequence of audio | 17 // be used any place timestamps need to be calculated for a sequence of audio |
| 16 // samples. It helps avoid timestamps inaccuracies caused by rounding/truncation | 18 // samples. It helps avoid timestamps inaccuracies caused by rounding/truncation |
| 17 // in repeated sample count to timestamp conversions. | 19 // in repeated sample count to timestamp conversions. |
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| 64 | 66 |
| 65 // Number of frames accumulated by AddFrames() calls. | 67 // Number of frames accumulated by AddFrames() calls. |
| 66 int64_t frame_count_; | 68 int64_t frame_count_; |
| 67 | 69 |
| 68 DISALLOW_IMPLICIT_CONSTRUCTORS(AudioTimestampHelper); | 70 DISALLOW_IMPLICIT_CONSTRUCTORS(AudioTimestampHelper); |
| 69 }; | 71 }; |
| 70 | 72 |
| 71 } // namespace media | 73 } // namespace media |
| 72 | 74 |
| 73 #endif | 75 #endif |
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