sender_packet_router.h | Explore in Territory

// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CAST_STREAMING_SENDER_PACKET_ROUTER_H_
#define CAST_STREAMING_SENDER_PACKET_ROUTER_H_

#include <stdint.h>

#include <chrono>
#include <memory>
#include <vector>

#include "cast/streaming/impl/bandwidth_estimator.h"
#include "cast/streaming/public/constants.h"
#include "cast/streaming/public/environment.h"
#include "cast/streaming/ssrc.h"
#include "platform/api/time.h"
#include "platform/base/span.h"
#include "util/alarm.h"

namespace openscreen::cast {

// Manages network packet transmission for one or more Senders, directing each
// inbound packet to a specific Sender instance, pacing the transmission of
// outbound packets, and employing network bandwidth/availability monitoring and
// congestion control.
//
// Instead of just sending packets whenever they want, Senders must request
// transmission from the SenderPacketRouter. The router then calls-back to each
// Sender, in the near future, when it has allocated an available time slice for
// transmission. The Sender is allowed to decide, at that exact moment, which
// packet most needs to be sent.
//
// Pacing strategy: Packets are sent in bursts. This allows the platform
// (operating system) to collect many small packets into a short-term buffer,
// which allows for optimizations at the link layer. For example, multiple
// packets can be sent together as one larger transmission unit, and this can be
// critical for good performance over shared-medium networks (such as 802.11
// WiFi). https://en.wikipedia.org/wiki/Frame-bursting
class SenderPacketRouter : public BandwidthEstimator,
                           public Environment::PacketConsumer { … };

}  // namespace openscreen::cast

#endif  // CAST_STREAMING_SENDER_PACKET_ROUTER_H_
chromium/third_party/openscreen/src/cast/streaming/sender_packet_router.h
