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/*
* 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.
*/
#ifndef WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_TEST_PACKET_SENDER_H_
#define WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_TEST_PACKET_SENDER_H_
#include <list>
#include <limits>
#include <string>
#include "webrtc/base/constructormagic.h"
#include "webrtc/base/scoped_ptr.h"
#include "webrtc/modules/interface/module.h"
#include "webrtc/modules/remote_bitrate_estimator/test/bwe.h"
#include "webrtc/modules/remote_bitrate_estimator/test/bwe_test_framework.h"
namespace webrtc {
namespace testing {
namespace bwe {
class MetricRecorder;
class PacketSender : public PacketProcessor {
public:
PacketSender(PacketProcessorListener* listener, int flow_id)
: PacketProcessor(listener, flow_id, kSender),
running_(true),
// For Packet::send_time_us() to be comparable with timestamps from
// clock_, the clock of the PacketSender and the Source must be aligned.
// We assume that both start at time 0.
clock_(0),
metric_recorder_(nullptr) {}
virtual ~PacketSender() {}
// Call GiveFeedback() with the returned interval in milliseconds, provided
// there is a new estimate available.
// Note that changing the feedback interval affects the timing of when the
// output of the estimators is sampled and therefore the baseline files may
// have to be regenerated.
virtual int GetFeedbackIntervalMs() const = 0;
void SetSenderTimestamps(Packets* in_out);
virtual uint32_t TargetBitrateKbps() { return 0; }
virtual void Pause();
virtual void Resume(int64_t paused_time_ms);
void set_metric_recorder(MetricRecorder* metric_recorder);
virtual void RecordBitrate();
protected:
bool running_; // Initialized by default as true.
SimulatedClock clock_;
private:
MetricRecorder* metric_recorder_;
};
class VideoSender : public PacketSender, public BitrateObserver {
public:
VideoSender(PacketProcessorListener* listener,
VideoSource* source,
BandwidthEstimatorType estimator);
virtual ~VideoSender();
int GetFeedbackIntervalMs() const override;
void RunFor(int64_t time_ms, Packets* in_out) override;
virtual VideoSource* source() const { return source_; }
uint32_t TargetBitrateKbps() override;
// Implements BitrateObserver.
void OnNetworkChanged(uint32_t target_bitrate_bps,
uint8_t fraction_lost,
int64_t rtt) override;
void Pause() override;
void Resume(int64_t paused_time_ms) override;
protected:
void ProcessFeedbackAndGeneratePackets(int64_t time_ms,
std::list<FeedbackPacket*>* feedbacks,
Packets* generated);
VideoSource* source_;
rtc::scoped_ptr<BweSender> bwe_;
int64_t start_of_run_ms_;
std::list<Module*> modules_;
private:
uint32_t previous_sending_bitrate_;
RTC_DISALLOW_COPY_AND_ASSIGN(VideoSender);
};
class PacedVideoSender : public VideoSender, public PacedSender::Callback {
public:
PacedVideoSender(PacketProcessorListener* listener,
VideoSource* source,
BandwidthEstimatorType estimator);
virtual ~PacedVideoSender();
void RunFor(int64_t time_ms, Packets* in_out) override;
// Implements PacedSender::Callback.
bool TimeToSendPacket(uint32_t ssrc,
uint16_t sequence_number,
int64_t capture_time_ms,
bool retransmission) override;
size_t TimeToSendPadding(size_t bytes) override;
// Implements BitrateObserver.
void OnNetworkChanged(uint32_t target_bitrate_bps,
uint8_t fraction_lost,
int64_t rtt) override;
private:
int64_t TimeUntilNextProcess(const std::list<Module*>& modules);
void CallProcess(const std::list<Module*>& modules);
void QueuePackets(Packets* batch, int64_t end_of_batch_time_us);
PacedSender pacer_;
Packets queue_;
Packets pacer_queue_;
RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(PacedVideoSender);
};
class TcpSender : public PacketSender {
public:
TcpSender(PacketProcessorListener* listener, int flow_id, int64_t offset_ms);
TcpSender(PacketProcessorListener* listener,
int flow_id,
int64_t offset_ms,
int send_limit_bytes);
virtual ~TcpSender() {}
void RunFor(int64_t time_ms, Packets* in_out) override;
int GetFeedbackIntervalMs() const override { return 10; }
uint32_t TargetBitrateKbps() override;
private:
struct InFlight {
public:
InFlight(const MediaPacket& packet)
: sequence_number(packet.header().sequenceNumber),
time_ms(packet.send_time_ms()) {}
InFlight(uint16_t seq_num, int64_t now_ms)
: sequence_number(seq_num), time_ms(now_ms) {}
bool operator<(const InFlight& rhs) const {
return sequence_number < rhs.sequence_number;
}
uint16_t sequence_number; // Sequence number of a packet in flight, or a
// packet which has just been acked.
int64_t time_ms; // Time of when the packet left the sender, or when the
// ack was received.
};
void SendPackets(Packets* in_out);
void UpdateCongestionControl(const FeedbackPacket* fb);
int TriggerTimeouts();
void HandleLoss();
Packets GeneratePackets(size_t num_packets);
void UpdateSendBitrateEstimate(size_t num_packets);
float cwnd_;
int ssthresh_;
std::set<InFlight> in_flight_;
bool ack_received_;
uint16_t last_acked_seq_num_;
uint16_t next_sequence_number_;
int64_t offset_ms_;
int64_t last_reduction_time_ms_;
int64_t last_rtt_ms_;
int total_sent_bytes_;
int send_limit_bytes_; // Initialized by default as kNoLimit.
int64_t last_generated_packets_ms_;
size_t num_recent_sent_packets_;
uint32_t bitrate_kbps_;
};
} // namespace bwe
} // namespace testing
} // namespace webrtc
#endif // WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_TEST_PACKET_SENDER_H_
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