blob: 014080530a00d792229f95a4e0a98a3f28586433 [file] [log] [blame]
/*
* Copyright (c) 2015 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/remote_bitrate_estimator/include/send_time_history.h"
#include "modules/rtp_rtcp/include/rtp_rtcp_defines.h"
#include "rtc_base/checks.h"
#include "system_wrappers/include/clock.h"
namespace webrtc {
SendTimeHistory::SendTimeHistory(const Clock* clock,
int64_t packet_age_limit_ms)
: clock_(clock), packet_age_limit_ms_(packet_age_limit_ms) {}
SendTimeHistory::~SendTimeHistory() {}
void SendTimeHistory::AddAndRemoveOld(const PacketFeedback& packet) {
int64_t now_ms = clock_->TimeInMilliseconds();
// Remove old.
while (!history_.empty() &&
now_ms - history_.begin()->second.creation_time_ms >
packet_age_limit_ms_) {
// TODO(sprang): Warn if erasing (too many) old items?
history_.erase(history_.begin());
}
// Add new.
int64_t unwrapped_seq_num = seq_num_unwrapper_.Unwrap(packet.sequence_number);
history_.insert(std::make_pair(unwrapped_seq_num, packet));
}
bool SendTimeHistory::OnSentPacket(uint16_t sequence_number,
int64_t send_time_ms) {
int64_t unwrapped_seq_num = seq_num_unwrapper_.Unwrap(sequence_number);
auto it = history_.find(unwrapped_seq_num);
if (it == history_.end())
return false;
it->second.send_time_ms = send_time_ms;
return true;
}
bool SendTimeHistory::GetFeedback(PacketFeedback* packet_feedback,
bool remove) {
RTC_DCHECK(packet_feedback);
int64_t unwrapped_seq_num =
seq_num_unwrapper_.Unwrap(packet_feedback->sequence_number);
latest_acked_seq_num_.emplace(
std::max(unwrapped_seq_num, latest_acked_seq_num_.value_or(0)));
RTC_DCHECK_GE(*latest_acked_seq_num_, 0);
auto it = history_.find(unwrapped_seq_num);
if (it == history_.end())
return false;
// Save arrival_time not to overwrite it.
int64_t arrival_time_ms = packet_feedback->arrival_time_ms;
*packet_feedback = it->second;
packet_feedback->arrival_time_ms = arrival_time_ms;
if (remove)
history_.erase(it);
return true;
}
size_t SendTimeHistory::GetOutstandingBytes(uint16_t local_net_id,
uint16_t remote_net_id) const {
size_t outstanding_bytes = 0;
auto unacked_it = history_.begin();
if (latest_acked_seq_num_) {
unacked_it = history_.lower_bound(*latest_acked_seq_num_);
}
for (; unacked_it != history_.end(); ++unacked_it) {
if (unacked_it->second.local_net_id == local_net_id &&
unacked_it->second.remote_net_id == remote_net_id &&
unacked_it->second.send_time_ms >= 0) {
outstanding_bytes += unacked_it->second.payload_size;
}
}
return outstanding_bytes;
}
} // namespace webrtc