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This simplifies the design by making simulated network more self sufficient. It also prepares for removing network node specific configuration (The behavior implementation should be responsible for handling any configuration.) Bug: webrtc:9510 Change-Id: I218d70c0359774d9891178fbd8b1bbc729cbad92 Reviewed-on: https://webrtc-review.googlesource.com/c/120346 Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Commit-Queue: Sebastian Jansson <srte@webrtc.org> Cr-Commit-Position: refs/heads/master@{#26450}
82 lines
2.7 KiB
C++
82 lines
2.7 KiB
C++
/*
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* Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef API_TEST_SIMULATED_NETWORK_H_
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#define API_TEST_SIMULATED_NETWORK_H_
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#include <stddef.h>
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#include <stdint.h>
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#include <deque>
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#include <queue>
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#include <vector>
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#include "absl/types/optional.h"
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#include "rtc_base/critical_section.h"
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#include "rtc_base/random.h"
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#include "rtc_base/thread_annotations.h"
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namespace webrtc {
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struct PacketInFlightInfo {
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PacketInFlightInfo(size_t size, int64_t send_time_us, uint64_t packet_id)
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: size(size), send_time_us(send_time_us), packet_id(packet_id) {}
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size_t size;
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int64_t send_time_us;
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// Unique identifier for the packet in relation to other packets in flight.
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uint64_t packet_id;
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};
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struct PacketDeliveryInfo {
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static constexpr int kNotReceived = -1;
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PacketDeliveryInfo(PacketInFlightInfo source, int64_t receive_time_us)
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: receive_time_us(receive_time_us), packet_id(source.packet_id) {}
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int64_t receive_time_us;
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uint64_t packet_id;
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};
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// BuiltInNetworkBehaviorConfig is a built-in network behavior configuration
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// for built-in network behavior that will be used by WebRTC if no custom
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// NetworkBehaviorInterface is provided.
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struct BuiltInNetworkBehaviorConfig {
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BuiltInNetworkBehaviorConfig() {}
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// Queue length in number of packets.
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size_t queue_length_packets = 0;
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// Delay in addition to capacity induced delay.
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int queue_delay_ms = 0;
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// Standard deviation of the extra delay.
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int delay_standard_deviation_ms = 0;
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// Link capacity in kbps.
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int link_capacity_kbps = 0;
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// Random packet loss.
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int loss_percent = 0;
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// If packets are allowed to be reordered.
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bool allow_reordering = false;
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// The average length of a burst of lost packets.
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int avg_burst_loss_length = -1;
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// Additional bytes to add to packet size.
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int packet_overhead = 0;
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};
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class NetworkBehaviorInterface {
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public:
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virtual bool EnqueuePacket(PacketInFlightInfo packet_info) = 0;
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// Retrieves all packets that should be delivered by the given receive time.
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virtual std::vector<PacketDeliveryInfo> DequeueDeliverablePackets(
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int64_t receive_time_us) = 0;
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// Returns time in microseconds when caller should call
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// DequeueDeliverablePackets to get next set of packets to deliver.
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virtual absl::optional<int64_t> NextDeliveryTimeUs() const = 0;
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virtual ~NetworkBehaviorInterface() = default;
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};
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} // namespace webrtc
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#endif // API_TEST_SIMULATED_NETWORK_H_
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