chromium/third_party/openscreen/src/cast/streaming/impl/clock_offset_estimator_impl.h

// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CAST_STREAMING_IMPL_CLOCK_OFFSET_ESTIMATOR_IMPL_H_
#define CAST_STREAMING_IMPL_CLOCK_OFFSET_ESTIMATOR_IMPL_H_

#include <stddef.h>
#include <stdint.h>

#include <map>
#include <optional>
#include <utility>

#include "cast/streaming/impl/clock_offset_estimator.h"
#include "cast/streaming/rtp_time.h"
#include "cast/streaming/impl/statistics_defines.h"
#include "platform/base/trivial_clock_traits.h"

namespace openscreen::cast {

// This implementation listens to two pairs of events:
//     1. FrameAckSent / FrameAckReceived (receiver->sender)
//     2. PacketSentToNetwork / PacketReceived (sender->receiver)
//
// There is a causal relationship between these events in that these events
// must happen in order. This class obtains the lower and upper bounds for
// the offset by taking the difference of timestamps.
class ClockOffsetEstimatorImpl final : public ClockOffsetEstimator { … };

}  // namespace openscreen::cast

#endif  // CAST_STREAMING_IMPL_CLOCK_OFFSET_ESTIMATOR_IMPL_H_