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/*
* Copyright (c) 2021 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.
*/
#include "modules/rtp_rtcp/source/capture_clock_offset_updater.h"
#include <cstdint>
#include <optional>
#include "api/units/time_delta.h"
#include "system_wrappers/include/ntp_time.h"
namespace webrtc {
std::optional<int64_t>
CaptureClockOffsetUpdater::AdjustEstimatedCaptureClockOffset(
std::optional<int64_t> remote_capture_clock_offset) const {
if (remote_capture_clock_offset == std::nullopt ||
remote_to_local_clock_offset_ == std::nullopt) {
return std::nullopt;
}
// Do calculations as "unsigned" to make overflows deterministic.
return static_cast<uint64_t>(*remote_capture_clock_offset) +
static_cast<uint64_t>(*remote_to_local_clock_offset_);
}
std::optional<TimeDelta> CaptureClockOffsetUpdater::ConvertsToTimeDela(
std::optional<int64_t> q32x32) {
if (q32x32 == std::nullopt) {
return std::nullopt;
}
return TimeDelta::Millis(Q32x32ToInt64Ms(*q32x32));
}
void CaptureClockOffsetUpdater::SetRemoteToLocalClockOffset(
std::optional<int64_t> offset_q32x32) {
remote_to_local_clock_offset_ = offset_q32x32;
}
} // namespace webrtc
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