diff options
Diffstat (limited to 'third_party/libwebrtc/modules/video_coding/timing/timestamp_extrapolator.h')
-rw-r--r-- | third_party/libwebrtc/modules/video_coding/timing/timestamp_extrapolator.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/third_party/libwebrtc/modules/video_coding/timing/timestamp_extrapolator.h b/third_party/libwebrtc/modules/video_coding/timing/timestamp_extrapolator.h new file mode 100644 index 0000000000..6a9763943e --- /dev/null +++ b/third_party/libwebrtc/modules/video_coding/timing/timestamp_extrapolator.h @@ -0,0 +1,48 @@ +/* + * Copyright (c) 2011 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 MODULES_VIDEO_CODING_TIMING_TIMESTAMP_EXTRAPOLATOR_H_ +#define MODULES_VIDEO_CODING_TIMING_TIMESTAMP_EXTRAPOLATOR_H_ + +#include <stdint.h> + +#include "absl/types/optional.h" +#include "api/units/timestamp.h" +#include "rtc_base/numerics/sequence_number_unwrapper.h" + +namespace webrtc { + +// Not thread safe. +class TimestampExtrapolator { + public: + explicit TimestampExtrapolator(Timestamp start); + void Update(Timestamp now, uint32_t ts90khz); + absl::optional<Timestamp> ExtrapolateLocalTime(uint32_t timestamp90khz) const; + void Reset(Timestamp start); + + private: + void CheckForWrapArounds(uint32_t ts90khz); + bool DelayChangeDetection(double error); + + double w_[2]; + double p_[2][2]; + Timestamp start_; + Timestamp prev_; + absl::optional<int64_t> first_unwrapped_timestamp_; + RtpTimestampUnwrapper unwrapper_; + absl::optional<int64_t> prev_unwrapped_timestamp_; + uint32_t packet_count_; + double detector_accumulator_pos_; + double detector_accumulator_neg_; +}; + +} // namespace webrtc + +#endif // MODULES_VIDEO_CODING_TIMING_TIMESTAMP_EXTRAPOLATOR_H_ |