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1 /* | 1 /* |
2 * Copyright (c) 2016 The WebRTC Project Authors. All rights reserved. | 2 * Copyright (c) 2016 The WebRTC Project Authors. All rights reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 4 * Use of this source code is governed by a BSD-style license |
5 * that can be found in the LICENSE file in the root of the source | 5 * that can be found in the LICENSE file in the root of the source |
6 * tree. An additional intellectual property rights grant can be found | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
11 #ifndef WEBRTC_BASE_TIMESTAMPALIGNER_H_ | 11 #ifndef WEBRTC_BASE_TIMESTAMPALIGNER_H_ |
12 #define WEBRTC_BASE_TIMESTAMPALIGNER_H_ | 12 #define WEBRTC_BASE_TIMESTAMPALIGNER_H_ |
13 | 13 |
14 #include "webrtc/base/basictypes.h" | 14 #include <stdint.h> |
| 15 |
15 #include "webrtc/base/constructormagic.h" | 16 #include "webrtc/base/constructormagic.h" |
16 | 17 |
17 namespace rtc { | 18 namespace rtc { |
18 | 19 |
19 // The TimestampAligner class helps translating camera timestamps into | 20 // The TimestampAligner class helps translating camera timestamps into |
20 // the same timescale as is used by rtc::TimeMicros(). Some cameras | 21 // the same timescale as is used by rtc::TimeMicros(). Some cameras |
21 // have built in timestamping which is more accurate than reading the | 22 // have built in timestamping which is more accurate than reading the |
22 // system clock, but using a different epoch and unknown clock drift. | 23 // system clock, but using a different epoch and unknown clock drift. |
23 // Frame timestamps in webrtc should use rtc::TimeMicros (system monotonic | 24 // Frame timestamps in webrtc should use rtc::TimeMicros (system monotonic |
24 // time), and this class provides a filter which lets us use the | 25 // time), and this class provides a filter which lets us use the |
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64 // translated timestamps, to get them back from the future. | 65 // translated timestamps, to get them back from the future. |
65 int64_t clip_bias_us_; | 66 int64_t clip_bias_us_; |
66 // Used to ensure that translated timestamps are monotonous. | 67 // Used to ensure that translated timestamps are monotonous. |
67 int64_t prev_translated_time_us_; | 68 int64_t prev_translated_time_us_; |
68 RTC_DISALLOW_COPY_AND_ASSIGN(TimestampAligner); | 69 RTC_DISALLOW_COPY_AND_ASSIGN(TimestampAligner); |
69 }; | 70 }; |
70 | 71 |
71 } // namespace rtc | 72 } // namespace rtc |
72 | 73 |
73 #endif // WEBRTC_BASE_TIMESTAMPALIGNER_H_ | 74 #endif // WEBRTC_BASE_TIMESTAMPALIGNER_H_ |
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