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Move field trial check WebRTC-DisableRtxRateLimiter

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Checking in sending classes avoids using global field trial string in favor of the injected one.

In addition to that RateLimiter looks wrong layer for check that field trial:
checking inside RateLimiter class might be surprising if it is used for limiting something else than RTX bitrate.
evaluating field trial for each retransmitting packet might be expensive

Bug: webrtc:15184, webrtc:10335
Change-Id: I87bae3522bbd9692629d4f9b6caa119be03f2bd6
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/322720
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Reviewed-by: Ying Wang <yinwa@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Jakob Ivarsson‎ <jakobi@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#40908}
This commit is contained in:
Danil Chapovalov 2023-10-09 15:28:57 +02:00 committed by WebRTC LUCI CQ
parent c4f3919fdd
commit c941579e95
5 changed files with 8 additions and 22 deletions
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6
audio/channel_send.cc
View file

@ -411,8 +411,10 @@ ChannelSend::ChannelSend(
configuration.event_log = event_log_;
configuration.rtt_stats = rtcp_rtt_stats;
configuration.retransmission_rate_limiter =
retransmission_rate_limiter_.get();
if (!field_trials.IsEnabled("WebRTC-DisableRtxRateLimiter")) {
configuration.retransmission_rate_limiter =
retransmission_rate_limiter_.get();
}
configuration.extmap_allow_mixed = extmap_allow_mixed;
configuration.rtcp_report_interval_ms = rtcp_report_interval_ms;
configuration.rtcp_packet_type_counter_observer = this;

4
call/rtp_video_sender.cc
View file

@ -226,7 +226,9 @@ std::vector<RtpStreamSender> CreateRtpStreamSenders(
configuration.send_bitrate_observer = observers.bitrate_observer;
configuration.send_packet_observer = observers.send_packet_observer;
configuration.event_log = event_log;
configuration.retransmission_rate_limiter = retransmission_rate_limiter;
if (!trials.IsEnabled("WebRTC-DisableRtxRateLimiter")) {
configuration.retransmission_rate_limiter = retransmission_rate_limiter;
}
configuration.rtp_stats_callback = observers.rtp_stats;
configuration.frame_encryptor = frame_encryptor;
configuration.require_frame_encryption =

2
rtc_base/BUILD.gn
View file

@ -525,7 +525,6 @@ rtc_library("rate_limiter") {
":macromagic",
":rate_statistics",
"../system_wrappers",
"../system_wrappers:field_trial",
"synchronization:mutex",
]
absl_deps = [ "//third_party/abseil-cpp/absl/types:optional" ]
@ -1964,7 +1963,6 @@ if (rtc_include_tests) {
"../api/units:time_delta",
"../api/units:timestamp",
"../system_wrappers",
"../test:field_trial",
"../test:fileutils",
"../test:test_main",
"../test:test_support",

4
rtc_base/rate_limiter.cc
View file

@ -14,7 +14,6 @@
#include "absl/types/optional.h"
#include "system_wrappers/include/clock.h"
#include "system_wrappers/include/field_trial.h"
namespace webrtc {
@ -35,8 +34,7 @@ bool RateLimiter::TryUseRate(size_t packet_size_bytes) {
MutexLock lock(&lock_);
int64_t now_ms = clock_->TimeInMilliseconds();
absl::optional<uint32_t> current_rate = current_rate_.Rate(now_ms);
if (!webrtc::field_trial::IsEnabled("WebRTC-DisableRtxRateLimiter") &&
current_rate) {
if (current_rate) {
// If there is a current rate, check if adding bytes would cause maximum
// bitrate target to be exceeded. If there is NOT a valid current rate,
// allow allocating rate even if target is exceeded. This prevents

14
rtc_base/rate_limiter_unittest.cc
View file

@ -15,7 +15,6 @@
#include "rtc_base/event.h"
#include "rtc_base/platform_thread.h"
#include "system_wrappers/include/clock.h"
#include "test/field_trial.h"
#include "test/gtest.h"
namespace webrtc {
@ -107,19 +106,6 @@ TEST_F(RateLimitTest, WindowSizeLimits) {
EXPECT_FALSE(rate_limiter->SetWindowSize(kWindowSizeMs + 1));
}
TEST_F(RateLimitTest, DiablesRtxRateLimiterByFieldTrial) {
webrtc::test::ScopedFieldTrials trial(
"WebRTC-DisableRtxRateLimiter/Enabled/");
// Fill rate, extend window to full size.
EXPECT_TRUE(rate_limiter->TryUseRate(kRateFillingBytes / 2));
clock_.AdvanceTimeMilliseconds(kWindowSizeMs - 1);
EXPECT_TRUE(rate_limiter->TryUseRate(kRateFillingBytes / 2));
// Does not limit rate even when all rate consumed.
EXPECT_TRUE(rate_limiter->TryUseRate(1));
}
static constexpr TimeDelta kMaxTimeout = TimeDelta::Seconds(30);
class ThreadTask {