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/*
* Copyright (c) 2012 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_RTP_RTCP_SOURCE_OVERUSE_DETECTOR_H_
#define WEBRTC_MODULES_RTP_RTCP_SOURCE_OVERUSE_DETECTOR_H_
#include <list>
#include "webrtc/modules/interface/module_common_types.h"
#include "webrtc/modules/remote_bitrate_estimator/include/bwe_defines.h"
#include "webrtc/typedefs.h"
namespace webrtc {
enum RateControlRegion;
// This class is assumed to be protected by the owner if used by multiple
// threads.
class OveruseDetector {
public:
explicit OveruseDetector(const OverUseDetectorOptions& options);
~OveruseDetector();
void Update(uint16_t packet_size,
int64_t timestamp_ms,
uint32_t rtp_timestamp,
int64_t now_ms);
BandwidthUsage State() const;
double NoiseVar() const;
void SetRateControlRegion(RateControlRegion region);
int64_t time_of_last_received_packet() const;
private:
struct FrameSample {
FrameSample()
: size(0),
complete_time_ms(-1),
timestamp(-1),
timestamp_ms(-1) {}
uint32_t size;
int64_t complete_time_ms;
int64_t timestamp;
int64_t timestamp_ms;
};
// Returns true if |timestamp| represent a time which is later than
// |prev_timestamp|.
static bool InOrderTimestamp(uint32_t timestamp, uint32_t prev_timestamp);
bool PacketInOrder(uint32_t timestamp, int64_t timestamp_ms);
// Prepares the overuse detector to start using timestamps in milliseconds
// instead of 90 kHz timestamps.
void SwitchTimeBase();
void TimeDeltas(const FrameSample& current_frame,
const FrameSample& prev_frame,
int64_t* t_delta,
double* ts_delta);
void UpdateKalman(int64_t t_delta,
double ts_elta,
uint32_t frame_size,
uint32_t prev_frame_size);
double UpdateMinFramePeriod(double ts_delta);
void UpdateNoiseEstimate(double residual, double ts_delta, bool stable_state);
BandwidthUsage Detect(double ts_delta);
double CurrentDrift();
OverUseDetectorOptions options_; // Must be first member
// variable. Cannot be const
// because we need to be copyable.
FrameSample current_frame_;
FrameSample prev_frame_;
uint16_t num_of_deltas_;
double slope_;
double offset_;
double E_[2][2];
double process_noise_[2];
double avg_noise_;
double var_noise_;
double threshold_;
std::list<double> ts_delta_hist_;
double prev_offset_;
double time_over_using_;
uint16_t over_use_counter_;
BandwidthUsage hypothesis_;
int64_t time_of_last_received_packet_;
};
} // namespace webrtc
#endif // WEBRTC_MODULES_RTP_RTCP_SOURCE_OVERUSE_DETECTOR_H_
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