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Using unit classes in BitrateAllocationUpdate struct.

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This prepares for moving BitrateAllocationUpdate to API.

Bug: webrtc:9718
Change-Id: Ib2bcedb6b68fde33b6a2466f40829e86438aa973
Reviewed-on: https://webrtc-review.googlesource.com/c/111507
Commit-Queue: Sebastian Jansson <srte@webrtc.org>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Reviewed-by: Oskar Sundbom <ossu@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#25737}
This commit is contained in:
Sebastian Jansson 2018-11-21 19:13:07 +01:00 committed by Commit Bot
parent e4cccae299
commit 13e5903626
8 changed files with 65 additions and 45 deletions
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16
audio/audio_send_stream.cc
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@ -465,18 +465,18 @@ uint32_t AudioSendStream::OnBitrateUpdated(BitrateAllocationUpdate update) {
// A send stream may be allocated a bitrate of zero if the allocator decides
// to disable it. For now we ignore this decision and keep sending on min
// bitrate.
if (update.bitrate_bps == 0) {
update.bitrate_bps = config_.min_bitrate_bps;
if (update.target_bitrate.IsZero()) {
update.target_bitrate = DataRate::bps(config_.min_bitrate_bps);
}
RTC_DCHECK_GE(update.bitrate_bps,
static_cast<uint32_t>(config_.min_bitrate_bps));
RTC_DCHECK_GE(update.target_bitrate.bps<int>(), config_.min_bitrate_bps);
// The bitrate allocator might allocate an higher than max configured bitrate
// if there is room, to allow for, as example, extra FEC. Ignore that for now.
const uint32_t max_bitrate_bps = config_.max_bitrate_bps;
if (update.bitrate_bps > max_bitrate_bps)
update.bitrate_bps = max_bitrate_bps;
const DataRate max_bitrate = DataRate::bps(config_.max_bitrate_bps);
if (update.target_bitrate > max_bitrate)
update.target_bitrate = max_bitrate;
channel_send_->SetBitrate(update.bitrate_bps, update.bwe_period_ms);
channel_send_->SetBitrate(update.target_bitrate.bps(),
update.bwe_period.ms());
// The amount of audio protection is not exposed by the encoder, hence
// always returning 0.

16
audio/audio_send_stream_unittest.cc
View File

@ -474,10 +474,10 @@ TEST(AudioSendStreamTest, DoesNotPassHigherBitrateThanMaxBitrate) {
EXPECT_CALL(*helper.channel_send(),
SetBitrate(helper.config().max_bitrate_bps, _));
BitrateAllocationUpdate update;
update.bitrate_bps = helper.config().max_bitrate_bps + 5000;
update.fraction_loss = 0;
update.rtt = 50;
update.bwe_period_ms = 6000;
update.target_bitrate = DataRate::bps(helper.config().max_bitrate_bps + 5000);
update.packet_loss_ratio = 0;
update.round_trip_time = TimeDelta::ms(50);
update.bwe_period = TimeDelta::ms(6000);
send_stream->OnBitrateUpdated(update);
}
@ -486,10 +486,10 @@ TEST(AudioSendStreamTest, ProbingIntervalOnBitrateUpdated) {
auto send_stream = helper.CreateAudioSendStream();
EXPECT_CALL(*helper.channel_send(), SetBitrate(_, 5000));
BitrateAllocationUpdate update;
update.bitrate_bps = helper.config().max_bitrate_bps + 5000;
update.fraction_loss = 0;
update.rtt = 50;
update.bwe_period_ms = 5000;
update.target_bitrate = DataRate::bps(helper.config().max_bitrate_bps + 5000);
update.packet_loss_ratio = 0;
update.round_trip_time = TimeDelta::ms(50);
update.bwe_period = TimeDelta::ms(5000);
send_stream->OnBitrateUpdated(update);
}

2
call/BUILD.gn
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@ -164,6 +164,8 @@ rtc_source_set("bitrate_allocator") {
"bitrate_allocator.h",
]
deps = [
"../api/units:data_rate",
"../api/units:time_delta",
"../modules/bitrate_controller",
"../rtc_base:checks",
"../rtc_base:rtc_base_approved",

33
call/bitrate_allocator.cc
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@ -55,6 +55,7 @@ BitrateAllocator::BitrateAllocator(LimitObserver* limit_observer)
last_non_zero_bitrate_bps_(kDefaultBitrateBps),
last_fraction_loss_(0),
last_rtt_(0),
last_bwe_period_ms_(1000),
num_pause_events_(0),
clock_(Clock::GetRealTimeClock()),
last_bwe_log_time_(0),
@ -115,10 +116,13 @@ void BitrateAllocator::OnNetworkChanged(uint32_t target_bitrate_bps,
for (auto& config : bitrate_observer_configs_) {
uint32_t allocated_bitrate = allocation[config.observer];
uint32_t allocated_bandwidth = bandwidth_allocation[config.observer];
uint32_t protection_bitrate =
config.observer->OnBitrateUpdated(BitrateAllocationUpdate{
allocated_bitrate, allocated_bandwidth, last_fraction_loss_,
last_rtt_, last_bwe_period_ms_});
BitrateAllocationUpdate update;
update.target_bitrate = DataRate::bps(allocated_bitrate);
update.link_capacity = DataRate::bps(allocated_bandwidth);
update.packet_loss_ratio = last_fraction_loss_ / 256.0;
update.round_trip_time = TimeDelta::ms(last_rtt_);
update.bwe_period = TimeDelta::ms(last_bwe_period_ms_);
uint32_t protection_bitrate = config.observer->OnBitrateUpdated(update);
if (allocated_bitrate == 0 && config.allocated_bitrate_bps > 0) {
if (target_bitrate_bps > 0)
@ -179,10 +183,13 @@ void BitrateAllocator::AddObserver(BitrateAllocatorObserver* observer,
for (auto& config : bitrate_observer_configs_) {
uint32_t allocated_bitrate = allocation[config.observer];
uint32_t bandwidth = bandwidth_allocation[config.observer];
uint32_t protection_bitrate =
config.observer->OnBitrateUpdated(BitrateAllocationUpdate{
allocated_bitrate, bandwidth, last_fraction_loss_, last_rtt_,
last_bwe_period_ms_});
BitrateAllocationUpdate update;
update.target_bitrate = DataRate::bps(allocated_bitrate);
update.link_capacity = DataRate::bps(bandwidth);
update.packet_loss_ratio = last_fraction_loss_ / 256.0;
update.round_trip_time = TimeDelta::ms(last_rtt_);
update.bwe_period = TimeDelta::ms(last_bwe_period_ms_);
uint32_t protection_bitrate = config.observer->OnBitrateUpdated(update);
config.allocated_bitrate_bps = allocated_bitrate;
if (allocated_bitrate > 0)
config.media_ratio = MediaRatio(allocated_bitrate, protection_bitrate);
@ -191,8 +198,14 @@ void BitrateAllocator::AddObserver(BitrateAllocatorObserver* observer,
// Currently, an encoder is not allowed to produce frames.
// But we still have to return the initial config bitrate + let the
// observer know that it can not produce frames.
observer->OnBitrateUpdated(BitrateAllocationUpdate{
0, 0, last_fraction_loss_, last_rtt_, last_bwe_period_ms_});
BitrateAllocationUpdate update;
update.target_bitrate = DataRate::Zero();
update.link_capacity = DataRate::Zero();
update.packet_loss_ratio = last_fraction_loss_ / 256.0;
update.round_trip_time = TimeDelta::ms(last_rtt_);
update.bwe_period = TimeDelta::ms(last_bwe_period_ms_);
observer->OnBitrateUpdated(update);
}
UpdateAllocationLimits();
}

13
call/bitrate_allocator.h
View File

@ -19,6 +19,8 @@
#include <utility>
#include <vector>
#include "api/units/data_rate.h"
#include "api/units/time_delta.h"
#include "rtc_base/bitrateallocationstrategy.h"
#include "rtc_base/sequenced_task_checker.h"
@ -27,12 +29,11 @@ namespace webrtc {
class Clock;
struct BitrateAllocationUpdate {
// TODO(srte): Rename to target_bitrate.
uint32_t bitrate_bps;
uint32_t link_capacity_bps;
uint8_t fraction_loss;
int64_t rtt;
int64_t bwe_period_ms;
DataRate target_bitrate = DataRate::Zero();
DataRate link_capacity = DataRate::Zero();
double packet_loss_ratio = 0;
TimeDelta round_trip_time = TimeDelta::PlusInfinity();
TimeDelta bwe_period = TimeDelta::PlusInfinity();
};
// Used by all send streams with adaptive bitrate, to get the currently
// allocated bitrate for the send stream. The current network properties are

11
call/bitrate_allocator_unittest.cc
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@ -60,11 +60,12 @@ class TestBitrateObserver : public BitrateAllocatorObserver {
}
uint32_t OnBitrateUpdated(BitrateAllocationUpdate update) override {
last_bitrate_bps_ = update.bitrate_bps;
last_fraction_loss_ = update.fraction_loss;
last_rtt_ms_ = update.rtt;
last_probing_interval_ms_ = update.bwe_period_ms;
return update.bitrate_bps * protection_ratio_;
last_bitrate_bps_ = update.target_bitrate.bps();
last_fraction_loss_ =
rtc::dchecked_cast<uint8_t>(update.packet_loss_ratio * 256);
last_rtt_ms_ = update.round_trip_time.ms();
last_probing_interval_ms_ = update.bwe_period.ms();
return update.target_bitrate.bps() * protection_ratio_;
}
uint32_t last_bitrate_bps_;
uint8_t last_fraction_loss_;

13
video/video_send_stream_impl.cc
View File

@ -616,14 +616,17 @@ uint32_t VideoSendStreamImpl::OnBitrateUpdated(BitrateAllocationUpdate update) {
RTC_DCHECK(rtp_video_sender_->IsActive())
<< "VideoSendStream::Start has not been called.";
rtp_video_sender_->OnBitrateUpdated(update.bitrate_bps, update.fraction_loss,
update.rtt,
stats_proxy_->GetSendFrameRate());
rtp_video_sender_->OnBitrateUpdated(
update.target_bitrate.bps(),
rtc::dchecked_cast<uint8_t>(update.packet_loss_ratio * 256),
update.round_trip_time.ms(), stats_proxy_->GetSendFrameRate());
encoder_target_rate_bps_ = rtp_video_sender_->GetPayloadBitrateBps();
encoder_target_rate_bps_ =
std::min(encoder_max_bitrate_bps_, encoder_target_rate_bps_);
video_stream_encoder_->OnBitrateUpdated(encoder_target_rate_bps_,
update.fraction_loss, update.rtt);
video_stream_encoder_->OnBitrateUpdated(
encoder_target_rate_bps_,
rtc::dchecked_cast<uint8_t>(update.packet_loss_ratio * 256),
update.round_trip_time.ms());
stats_proxy_->OnSetEncoderTargetRate(encoder_target_rate_bps_);
return rtp_video_sender_->GetProtectionBitrateBps();
}

6
video/video_send_stream_impl_unittest.cc
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@ -72,9 +72,9 @@ class MockRtpVideoSender : public RtpVideoSenderInterface {
BitrateAllocationUpdate CreateAllocation(int bitrate_bps) {
BitrateAllocationUpdate update;
update.bitrate_bps = bitrate_bps;
update.fraction_loss = 0;
update.rtt = 0;
update.target_bitrate = DataRate::bps(bitrate_bps);
update.packet_loss_ratio = 0;
update.round_trip_time = TimeDelta::Zero();
return update;
}
} // namespace