Move webrtc/{base => rtc_base}

webrtc/base/timestampaligner.h

 /*
  *  Copyright (c) 2016 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #ifndef WEBRTC_BASE_TIMESTAMPALIGNER_H_
 #define WEBRTC_BASE_TIMESTAMPALIGNER_H_
 
-#include <stdint.h>
 
-#include "webrtc/base/constructormagic.h"
-
-namespace rtc {
-
-// The TimestampAligner class helps translating camera timestamps into
-// the same timescale as is used by rtc::TimeMicros(). Some cameras
-// have built in timestamping which is more accurate than reading the
-// system clock, but using a different epoch and unknown clock drift.
-// Frame timestamps in webrtc should use rtc::TimeMicros (system monotonic
-// time), and this class provides a filter which lets us use the
-// rtc::TimeMicros timescale, and at the same time take advantage of
-// higher accuracy of the camera clock.
-
-// This class is not thread safe, so all calls to it must be synchronized
-// externally.
-class TimestampAligner {
- public:
-  TimestampAligner();
-  ~TimestampAligner();
-
- public:
-  // Translates camera timestamps to the same timescale as is used by
-  // rtc::TimeMicros(). |camera_time_us| is assumed to be accurate, but
-  // with an unknown epoch and clock drift. |system_time_us| is
-  // time according to rtc::TimeMicros(), preferably read as soon as
-  // possible when the frame is captured. It may have poor accuracy
-  // due to poor resolution or scheduling delays. Returns the
-  // translated timestamp.
-  int64_t TranslateTimestamp(int64_t camera_time_us, int64_t system_time_us);
-
- protected:
-  // Update the estimated offset between camera time and system monotonic time.
-  int64_t UpdateOffset(int64_t camera_time_us, int64_t system_time_us);
-
-  // Clip timestamp, return value is always
-  //    <= |system_time_us|, and
-  //    >= min(|prev_translated_time_us_| + |kMinFrameIntervalUs|,
-  //           |system_time_us|).
-  int64_t ClipTimestamp(int64_t filtered_time_us, int64_t system_time_us);
-
- private:
-  // State for the timestamp translation.
-  int frames_seen_;
-  // Estimated offset between camera time and system monotonic time.
-  int64_t offset_us_;
-
-  // State for the ClipTimestamp method, applied after the filter.
-  // A large negative camera clock drift tends to push translated
-  // timestamps into the future. |clip_bias_us_| is subtracted from the
-  // translated timestamps, to get them back from the future.
-  int64_t clip_bias_us_;
-  // Used to ensure that translated timestamps are monotonous.
-  int64_t prev_translated_time_us_;
-  RTC_DISALLOW_COPY_AND_ASSIGN(TimestampAligner);
-};
-
-}  // namespace rtc
+// This header is deprecated and is just left here temporarily during
+// refactoring. See https://bugs.webrtc.org/7634 for more details.
+#include "webrtc/rtc_base/timestampaligner.h"
 
 #endif  // WEBRTC_BASE_TIMESTAMPALIGNER_H_