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/*
* Copyright (c) 2017-2019 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <hicn/transport/core/content_object.h>
#include <protocols/rtc/trendline_estimator.h>
#include <map>
#include <queue>
#define HICN_CC_STATS_CHUNK_SIZE 10
#define HICN_CC_STATS_MAX_DELAY_MS 100
namespace transport {
namespace protocol {
namespace rtc {
class FrameStats {
public:
FrameStats()
: frame_num_(0),
sent_time_(0),
received_time_(0),
previous_sent_time_(0),
previous_received_time_(0),
size_(0),
received_pkt_m(0),
burst_size_m(HICN_CC_STATS_CHUNK_SIZE){};
FrameStats(uint32_t burst_size)
: frame_num_(0),
sent_time_(0),
received_time_(0),
previous_sent_time_(0),
previous_received_time_(0),
size_(0),
received_pkt_m(0),
burst_size_m(burst_size){};
FrameStats(uint32_t frame_num, uint32_t burst_size)
: frame_num_(frame_num),
sent_time_(0),
received_time_(0),
previous_sent_time_(0),
previous_received_time_(0),
size_(0),
received_pkt_m(0),
burst_size_m(burst_size){};
FrameStats(uint32_t frame_num, uint64_t sent_time, uint64_t received_time,
uint32_t size, FrameStats previousFrame, uint32_t burst_size)
: frame_num_(frame_num),
sent_time_(sent_time),
received_time_(received_time),
previous_sent_time_(previousFrame.getSentTime()),
previous_received_time_(previousFrame.getReceivedTime()),
size_(size),
received_pkt_m(1),
burst_size_m(burst_size){};
void addPacket(uint64_t sent_time, uint64_t received_time, uint32_t size) {
size_ += size;
sent_time_ =
(sent_time_ == 0) ? sent_time : std::min(sent_time_, sent_time);
received_time_ = std::max(received_time, received_time_);
received_pkt_m++;
}
bool isComplete() { return received_pkt_m == burst_size_m; }
uint32_t getFrameSeqNum() const { return frame_num_; }
uint64_t getSentTime() const { return sent_time_; }
uint64_t getReceivedTime() const { return received_time_; }
uint32_t getFrameSize() const { return size_; }
void setPreviousReceivedTime(uint64_t time) {
previous_received_time_ = time;
}
void setPreviousSentTime(uint64_t time) { previous_sent_time_ = time; }
// todo manage first frame
double getReceivedDelta() {
return static_cast<double>(received_time_ - previous_received_time_);
}
double getSentDelta() {
return static_cast<double>(sent_time_ - previous_sent_time_);
}
private:
uint32_t frame_num_;
uint64_t sent_time_;
uint64_t received_time_;
uint64_t previous_sent_time_;
uint64_t previous_received_time_;
uint32_t size_;
uint32_t received_pkt_m;
uint32_t burst_size_m;
};
class CongestionDetection {
public:
CongestionDetection();
~CongestionDetection();
void addPacket(const core::ContentObject &content_object);
BandwidthUsage getState() { return cc_estimator_.State(); }
void updateStats();
private:
TrendlineEstimator cc_estimator_;
std::map<uint32_t, FrameStats> chunks_;
std::queue<uint32_t> chunks_number_;
FrameStats last_processed_chunk_;
};
} // end namespace rtc
} // end namespace protocol
} // end namespace transport
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