06e05a85b9
This drops the payload size difference dimension of the Kalman filter, which doesn't improve the quality of the estimation when pacing packets on the send-side. R=gaetano.carlucci@gmail.com, mflodman@webrtc.org, terelius@webrtc.org Review URL: https://codereview.webrtc.org/1376423002 . Cr-Commit-Position: refs/heads/master@{#10809}
77 lines
2.7 KiB
C++
77 lines
2.7 KiB
C++
/*
|
|
* Copyright (c) 2013 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_MODULES_REMOTE_BITRATE_ESTIMATOR_INTER_ARRIVAL_H_
|
|
#define WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_INTER_ARRIVAL_H_
|
|
|
|
#include <cstddef>
|
|
|
|
#include "webrtc/base/constructormagic.h"
|
|
#include "webrtc/typedefs.h"
|
|
|
|
namespace webrtc {
|
|
|
|
// Helper class to compute the inter-arrival time delta and the size delta
|
|
// between two timestamp groups. A timestamp is a 32 bit unsigned number with
|
|
// a client defined rate.
|
|
class InterArrival {
|
|
public:
|
|
// A timestamp group is defined as all packets with a timestamp which are at
|
|
// most timestamp_group_length_ticks newer than the first timestamp in that
|
|
// group.
|
|
InterArrival(uint32_t timestamp_group_length_ticks,
|
|
double timestamp_to_ms_coeff,
|
|
bool enable_burst_grouping);
|
|
|
|
// This function returns true if a delta was computed, or false if the current
|
|
// group is still incomplete or if only one group has been completed.
|
|
// |timestamp| is the timestamp.
|
|
// |arrival_time_ms| is the local time at which the packet arrived.
|
|
// |timestamp_delta| (output) is the computed timestamp delta.
|
|
// |arrival_time_delta_ms| (output) is the computed arrival-time delta.
|
|
bool ComputeDeltas(uint32_t timestamp,
|
|
int64_t arrival_time_ms,
|
|
uint32_t* timestamp_delta,
|
|
int64_t* arrival_time_delta_ms);
|
|
|
|
private:
|
|
struct TimestampGroup {
|
|
TimestampGroup() : first_timestamp(0), timestamp(0), complete_time_ms(-1) {}
|
|
|
|
bool IsFirstPacket() const {
|
|
return complete_time_ms == -1;
|
|
}
|
|
|
|
uint32_t first_timestamp;
|
|
uint32_t timestamp;
|
|
int64_t complete_time_ms;
|
|
};
|
|
|
|
// Returns true if the packet with timestamp |timestamp| arrived in order.
|
|
bool PacketInOrder(uint32_t timestamp);
|
|
|
|
// Returns true if the last packet was the end of the current batch and the
|
|
// packet with |timestamp| is the first of a new batch.
|
|
bool NewTimestampGroup(int64_t arrival_time_ms, uint32_t timestamp) const;
|
|
|
|
bool BelongsToBurst(int64_t arrival_time_ms, uint32_t timestamp) const;
|
|
|
|
const uint32_t kTimestampGroupLengthTicks;
|
|
TimestampGroup current_timestamp_group_;
|
|
TimestampGroup prev_timestamp_group_;
|
|
double timestamp_to_ms_coeff_;
|
|
bool burst_grouping_;
|
|
|
|
RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(InterArrival);
|
|
};
|
|
} // namespace webrtc
|
|
|
|
#endif // WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_INTER_ARRIVAL_H_
|