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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 "webrtc/base/basictypes.h" |
15 #include "webrtc/base/constructormagic.h" | 15 #include "webrtc/base/constructormagic.h" |
16 #include "webrtc/base/optional.h" | 16 #include "webrtc/base/optional.h" |
17 #include "webrtc/base/thread_checker.h" | |
18 | 17 |
19 namespace rtc { | 18 namespace rtc { |
20 | 19 |
21 class TimestampAligner { | 20 class TimestampAligner { |
perkj_webrtc
2016/09/01 10:10:22
Can you please add a comment about the thread assu
magjed_webrtc
2016/09/01 10:21:04
Done.
| |
22 public: | 21 public: |
23 TimestampAligner(); | 22 TimestampAligner(); |
24 ~TimestampAligner(); | 23 ~TimestampAligner(); |
25 | 24 |
26 public: | 25 public: |
27 // Update the estimated offset between camera time and system monotonic time. | 26 // Update the estimated offset between camera time and system monotonic time. |
28 int64_t UpdateOffset(int64_t camera_time_us, int64_t system_time_us); | 27 int64_t UpdateOffset(int64_t camera_time_us, int64_t system_time_us); |
29 | 28 |
30 int64_t ClipTimestamp(int64_t filtered_time_us, int64_t system_time_us); | 29 int64_t ClipTimestamp(int64_t filtered_time_us, int64_t system_time_us); |
31 | 30 |
32 private: | 31 private: |
33 rtc::ThreadChecker thread_checker_; | |
34 | |
35 // State for the timestamp translation. | 32 // State for the timestamp translation. |
36 int frames_seen_; | 33 int frames_seen_; |
37 // Estimated offset between camera time and system monotonic time. | 34 // Estimated offset between camera time and system monotonic time. |
38 int64_t offset_us_; | 35 int64_t offset_us_; |
39 | 36 |
40 // State for timestamp clipping, applied after the filter, to ensure | 37 // State for timestamp clipping, applied after the filter, to ensure |
41 // that translated timestamps are monotonic and not in the future. | 38 // that translated timestamps are monotonic and not in the future. |
42 // Subtracted from the translated timestamps. | 39 // Subtracted from the translated timestamps. |
43 int64_t clip_bias_us_; | 40 int64_t clip_bias_us_; |
44 rtc::Optional<int64_t> prev_translated_time_us_; | 41 rtc::Optional<int64_t> prev_translated_time_us_; |
45 RTC_DISALLOW_COPY_AND_ASSIGN(TimestampAligner); | 42 RTC_DISALLOW_COPY_AND_ASSIGN(TimestampAligner); |
46 }; | 43 }; |
47 | 44 |
48 } // namespace rtc | 45 } // namespace rtc |
49 | 46 |
50 #endif // WEBRTC_BASE_TIMESTAMPALIGNER_H_ | 47 #endif // WEBRTC_BASE_TIMESTAMPALIGNER_H_ |
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