Markus Handell c8c4a282a6 Introduce support for video packet batching.
This CL introduces a new feature enabling video packet send batches.
The feature is enabled via
PeerConnectionInterface
::RTCConfiguration
::MediaConfig
::enable_send_packet_batching.

PacketOptions have been augmented with attribute "batchable" (set for
all video packets) and attribute "last_packet_in_batch" which gives
injected AsyncPacketSockets a chance to understand when a batch begins
and ends.

When the feature is on, packets are collected in RtpSenderEgress. On
reception of OnBatchComplete from PacingController, RtpSenderEgress
sends the collected batch, setting "last_packet_in_batch" to true
in the last packet.

Bug: chromium:1439830
Change-Id: I1846b9d4a8a0efd227d617691213a2e048bdc8a2
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/303720
Commit-Queue: Markus Handell <handellm@webrtc.org>
Reviewed-by: Stefan Holmer <stefan@webrtc.org>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#40012}
2023-05-08 16:24:03 +00:00

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# Copyright (c) 2014 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.
import("../../webrtc.gni")
rtc_library("pacing") {
# Client code SHOULD NOT USE THIS TARGET, but for now it needs to be public
# because there exists client code that uses it.
# TODO(bugs.webrtc.org/9808): Move to private visibility as soon as that
# client code gets updated.
visibility = [ "*" ]
sources = [
"bitrate_prober.cc",
"bitrate_prober.h",
"pacing_controller.cc",
"pacing_controller.h",
"packet_router.cc",
"packet_router.h",
"prioritized_packet_queue.cc",
"prioritized_packet_queue.h",
"rtp_packet_pacer.h",
"task_queue_paced_sender.cc",
"task_queue_paced_sender.h",
]
deps = [
":interval_budget",
"../../api:field_trials_view",
"../../api:field_trials_view",
"../../api:function_view",
"../../api:sequence_checker",
"../../api/rtc_event_log",
"../../api/task_queue:pending_task_safety_flag",
"../../api/task_queue:task_queue",
"../../api/transport:field_trial_based_config",
"../../api/transport:network_control",
"../../api/units:data_rate",
"../../api/units:data_size",
"../../api/units:time_delta",
"../../api/units:timestamp",
"../../logging:rtc_event_bwe",
"../../logging:rtc_event_pacing",
"../../rtc_base:checks",
"../../rtc_base:event_tracer",
"../../rtc_base:logging",
"../../rtc_base:macromagic",
"../../rtc_base:rtc_numerics",
"../../rtc_base:rtc_task_queue",
"../../rtc_base:timeutils",
"../../rtc_base/experiments:field_trial_parser",
"../../rtc_base/synchronization:mutex",
"../../rtc_base/system:unused",
"../../system_wrappers",
"../../system_wrappers:metrics",
"../rtp_rtcp",
"../rtp_rtcp:rtp_rtcp_format",
"../utility:utility",
]
absl_deps = [
"//third_party/abseil-cpp/absl/cleanup",
"//third_party/abseil-cpp/absl/memory",
"//third_party/abseil-cpp/absl/strings",
"//third_party/abseil-cpp/absl/types:optional",
]
}
rtc_library("interval_budget") {
sources = [
"interval_budget.cc",
"interval_budget.h",
]
deps = [
"../../rtc_base:checks",
"../../rtc_base:safe_conversions",
]
}
if (rtc_include_tests) {
rtc_library("pacing_unittests") {
testonly = true
sources = [
"bitrate_prober_unittest.cc",
"interval_budget_unittest.cc",
"pacing_controller_unittest.cc",
"packet_router_unittest.cc",
"prioritized_packet_queue_unittest.cc",
"task_queue_paced_sender_unittest.cc",
]
deps = [
":interval_budget",
":pacing",
"../../api/task_queue:task_queue",
"../../api/transport:network_control",
"../../api/units:data_rate",
"../../api/units:data_size",
"../../api/units:time_delta",
"../../api/units:timestamp",
"../../rtc_base:checks",
"../../rtc_base:rtc_base_tests_utils",
"../../rtc_base/experiments:alr_experiment",
"../../system_wrappers",
"../../test:explicit_key_value_config",
"../../test:scoped_key_value_config",
"../../test:test_support",
"../../test/time_controller:time_controller",
"../rtp_rtcp",
"../rtp_rtcp:mock_rtp_rtcp",
"../rtp_rtcp:rtp_rtcp_format",
]
absl_deps = [ "//third_party/abseil-cpp/absl/functional:any_invocable" ]
}
}