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platform-external-webrtc/video/video_send_stream_impl_unittest.cc
Erik Språng 4e193e4f76 Add ability to throttle VideoBitrateAllocation updates. 
When the bandwidth estimate is volatile, and the frame rate is high,
each new frame might trigger a new video bitrate allocation that is very
close to the previous one, during BWE rampup.
This might cause unnecessarily high RTCP traffic.

This CL throttles those updates, if the allocation fullfills all of:
* Larger or the same total bitrate as the previously sent one
* Less than 10% larger bitrate compared to the previous one
* Same layers enables as the previous one
* Less than 500ms has passed since the previous one

Additionally, a call to OnEncodedImage can cause a throttled allocation
to be sent if 500ms has passed but no new call to OnBitrateUpdated has
been seen.

Bug: webrtc:9734
Change-Id: I2a17c2e512387e273e9c22bffcebd290727dc883
Reviewed-on: https://webrtc-review.googlesource.com/100560
Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org>
Commit-Queue: Erik Språng <sprang@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24751}
2018-09-17 10:01:27 +00:00

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/*
* Copyright 2018 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.
*/
#include <string>
#include "call/rtp_video_sender.h"
#include "call/test/mock_bitrate_allocator.h"
#include "call/test/mock_rtp_transport_controller_send.h"
#include "logging/rtc_event_log/rtc_event_log.h"
#include "modules/utility/include/process_thread.h"
#include "modules/video_coding/fec_controller_default.h"
#include "rtc_base/experiments/alr_experiment.h"
#include "rtc_base/fakeclock.h"
#include "rtc_base/task_queue_for_test.h"
#include "test/field_trial.h"
#include "test/gmock.h"
#include "test/gtest.h"
#include "test/mock_transport.h"
#include "video/test/mock_video_stream_encoder.h"
#include "video/video_send_stream_impl.h"
namespace webrtc {
namespace internal {
namespace {
using testing::NiceMock;
using testing::StrictMock;
using testing::ReturnRef;
using testing::Return;
using testing::Invoke;
using testing::_;
constexpr int64_t kDefaultInitialBitrateBps = 333000;
const double kDefaultBitratePriority = 0.5;
const float kAlrProbingExperimentPaceMultiplier = 1.0f;
std::string GetAlrProbingExperimentString() {
return std::string(
AlrExperimentSettings::kScreenshareProbingBweExperimentName) +
"/1.0,2875,80,40,-60,3/";
}
class MockPayloadRouter : public RtpVideoSenderInterface {
public:
MOCK_METHOD1(RegisterProcessThread, void(ProcessThread*));
MOCK_METHOD0(DeRegisterProcessThread, void());
MOCK_METHOD1(SetActive, void(bool));
MOCK_METHOD1(SetActiveModules, void(const std::vector<bool>));
MOCK_METHOD0(IsActive, bool());
MOCK_METHOD1(OnNetworkAvailability, void(bool));
MOCK_CONST_METHOD0(GetRtpStates, std::map<uint32_t, RtpState>());
MOCK_CONST_METHOD0(GetRtpPayloadStates,
std::map<uint32_t, RtpPayloadState>());
MOCK_CONST_METHOD0(FecEnabled, bool());
MOCK_CONST_METHOD0(NackEnabled, bool());
MOCK_METHOD2(DeliverRtcp, void(const uint8_t*, size_t));
MOCK_METHOD5(ProtectionRequest,
void(const FecProtectionParams*,
const FecProtectionParams*,
uint32_t*,
uint32_t*,
uint32_t*));
MOCK_METHOD1(SetMaxRtpPacketSize, void(size_t));
MOCK_METHOD1(OnBitrateAllocationUpdated, void(const VideoBitrateAllocation&));
MOCK_METHOD3(OnEncodedImage,
EncodedImageCallback::Result(const EncodedImage&,
const CodecSpecificInfo*,
const RTPFragmentationHeader*));
};
} // namespace
class VideoSendStreamImplTest : public ::testing::Test {
protected:
VideoSendStreamImplTest()
: clock_(1000 * 1000 * 1000),
config_(&transport_),
send_delay_stats_(&clock_),
test_queue_("test_queue"),
process_thread_(ProcessThread::Create("test_thread")),
call_stats_(&clock_, process_thread_.get()),
stats_proxy_(&clock_,
config_,
VideoEncoderConfig::ContentType::kRealtimeVideo) {
config_.rtp.ssrcs.push_back(8080);
config_.rtp.payload_type = 1;
EXPECT_CALL(transport_controller_, keepalive_config())
.WillRepeatedly(ReturnRef(keepalive_config_));
EXPECT_CALL(transport_controller_, packet_router())
.WillRepeatedly(Return(&packet_router_));
EXPECT_CALL(transport_controller_,
CreateRtpVideoSender(_, _, _, _, _, _, _, _))
.WillRepeatedly(Return(&payload_router_));
EXPECT_CALL(payload_router_, SetActive(_))
.WillRepeatedly(testing::Invoke(
[&](bool active) { payload_router_active_ = active; }));
EXPECT_CALL(payload_router_, IsActive())
.WillRepeatedly(
testing::Invoke([&]() { return payload_router_active_; }));
}
~VideoSendStreamImplTest() {}
std::unique_ptr<VideoSendStreamImpl> CreateVideoSendStreamImpl(
int initial_encoder_max_bitrate,
double initial_encoder_bitrate_priority,
VideoEncoderConfig::ContentType content_type) {
EXPECT_CALL(bitrate_allocator_, GetStartBitrate(_))
.WillOnce(Return(123000));
std::map<uint32_t, RtpState> suspended_ssrcs;
std::map<uint32_t, RtpPayloadState> suspended_payload_states;
return absl::make_unique<VideoSendStreamImpl>(
&stats_proxy_, &test_queue_, &call_stats_, &transport_controller_,
&bitrate_allocator_, &send_delay_stats_, &video_stream_encoder_,
&event_log_, &config_, initial_encoder_max_bitrate,
initial_encoder_bitrate_priority, suspended_ssrcs,
suspended_payload_states, content_type,
absl::make_unique<FecControllerDefault>(&clock_));
}
protected:
NiceMock<MockTransport> transport_;
NiceMock<MockRtpTransportControllerSend> transport_controller_;
NiceMock<MockBitrateAllocator> bitrate_allocator_;
NiceMock<MockVideoStreamEncoder> video_stream_encoder_;
NiceMock<MockPayloadRouter> payload_router_;
bool payload_router_active_ = false;
SimulatedClock clock_;
RtcEventLogNullImpl event_log_;
VideoSendStream::Config config_;
SendDelayStats send_delay_stats_;
rtc::test::TaskQueueForTest test_queue_;
std::unique_ptr<ProcessThread> process_thread_;
CallStats call_stats_;
SendStatisticsProxy stats_proxy_;
PacketRouter packet_router_;
RtpKeepAliveConfig keepalive_config_;
};
TEST_F(VideoSendStreamImplTest, RegistersAsBitrateObserverOnStart) {
test_queue_.SendTask([this] {
config_.track_id = "test";
const bool kSuspend = false;
config_.suspend_below_min_bitrate = kSuspend;
auto vss_impl = CreateVideoSendStreamImpl(
kDefaultInitialBitrateBps, kDefaultBitratePriority,
VideoEncoderConfig::ContentType::kRealtimeVideo);
EXPECT_CALL(bitrate_allocator_, AddObserver(vss_impl.get(), _))
.WillOnce(Invoke(
[&](BitrateAllocatorObserver*, MediaStreamAllocationConfig config) {
EXPECT_EQ(config.min_bitrate_bps, 0u);
EXPECT_EQ(config.max_bitrate_bps, kDefaultInitialBitrateBps);
EXPECT_EQ(config.pad_up_bitrate_bps, 0u);
EXPECT_EQ(config.enforce_min_bitrate, !kSuspend);
EXPECT_EQ(config.track_id, "test");
EXPECT_EQ(config.bitrate_priority, kDefaultBitratePriority);
EXPECT_EQ(config.has_packet_feedback, false);
}));
vss_impl->Start();
EXPECT_CALL(bitrate_allocator_, RemoveObserver(vss_impl.get())).Times(1);
vss_impl->Stop();
});
}
TEST_F(VideoSendStreamImplTest, UpdatesObserverOnConfigurationChange) {
test_queue_.SendTask([this] {
config_.track_id = "test";
const bool kSuspend = false;
config_.suspend_below_min_bitrate = kSuspend;
config_.rtp.extensions.emplace_back(
RtpExtension::kTransportSequenceNumberUri, 1);
auto vss_impl = CreateVideoSendStreamImpl(
kDefaultInitialBitrateBps, kDefaultBitratePriority,
VideoEncoderConfig::ContentType::kRealtimeVideo);
vss_impl->Start();
// QVGA + VGA configuration matching defaults in media/engine/simulcast.cc.
VideoStream qvga_stream;
qvga_stream.width = 320;
qvga_stream.height = 180;
qvga_stream.max_framerate = 30;
qvga_stream.min_bitrate_bps = 30000;
qvga_stream.target_bitrate_bps = 150000;
qvga_stream.max_bitrate_bps = 200000;
qvga_stream.max_qp = 56;
qvga_stream.bitrate_priority = 1;
VideoStream vga_stream;
vga_stream.width = 640;
vga_stream.height = 360;
vga_stream.max_framerate = 30;
vga_stream.min_bitrate_bps = 150000;
vga_stream.target_bitrate_bps = 500000;
vga_stream.max_bitrate_bps = 700000;
vga_stream.max_qp = 56;
vga_stream.bitrate_priority = 1;
int min_transmit_bitrate_bps = 30000;
config_.rtp.ssrcs.emplace_back(1);
config_.rtp.ssrcs.emplace_back(2);
EXPECT_CALL(bitrate_allocator_, AddObserver(vss_impl.get(), _))
.WillOnce(Invoke(
[&](BitrateAllocatorObserver*, MediaStreamAllocationConfig config) {
EXPECT_EQ(config.min_bitrate_bps,
static_cast<uint32_t>(min_transmit_bitrate_bps));
EXPECT_EQ(config.max_bitrate_bps,
static_cast<uint32_t>(qvga_stream.max_bitrate_bps +
vga_stream.max_bitrate_bps));
EXPECT_EQ(config.pad_up_bitrate_bps,
static_cast<uint32_t>(qvga_stream.target_bitrate_bps +
vga_stream.min_bitrate_bps));
EXPECT_EQ(config.enforce_min_bitrate, !kSuspend);
EXPECT_EQ(config.has_packet_feedback, true);
}));
static_cast<VideoStreamEncoderInterface::EncoderSink*>(vss_impl.get())
->OnEncoderConfigurationChanged(
std::vector<VideoStream>{qvga_stream, vga_stream},
min_transmit_bitrate_bps);
vss_impl->Stop();
});
}
TEST_F(VideoSendStreamImplTest, UpdatesObserverOnConfigurationChangeWithAlr) {
test_queue_.SendTask([this] {
config_.track_id = "test";
const bool kSuspend = false;
config_.suspend_below_min_bitrate = kSuspend;
config_.rtp.extensions.emplace_back(
RtpExtension::kTransportSequenceNumberUri, 1);
config_.periodic_alr_bandwidth_probing = true;
auto vss_impl = CreateVideoSendStreamImpl(
kDefaultInitialBitrateBps, kDefaultBitratePriority,
VideoEncoderConfig::ContentType::kScreen);
vss_impl->Start();
// Simulcast screenshare.
VideoStream low_stream;
low_stream.width = 1920;
low_stream.height = 1080;
low_stream.max_framerate = 5;
low_stream.min_bitrate_bps = 30000;
low_stream.target_bitrate_bps = 200000;
low_stream.max_bitrate_bps = 1000000;
low_stream.num_temporal_layers = 2;
low_stream.max_qp = 56;
low_stream.bitrate_priority = 1;
VideoStream high_stream;
high_stream.width = 1920;
high_stream.height = 1080;
high_stream.max_framerate = 30;
high_stream.min_bitrate_bps = 60000;
high_stream.target_bitrate_bps = 1250000;
high_stream.max_bitrate_bps = 1250000;
high_stream.num_temporal_layers = 2;
high_stream.max_qp = 56;
high_stream.bitrate_priority = 1;
// With ALR probing, this will be the padding target instead of
// low_stream.target_bitrate_bps + high_stream.min_bitrate_bps.
int min_transmit_bitrate_bps = 400000;
config_.rtp.ssrcs.emplace_back(1);
config_.rtp.ssrcs.emplace_back(2);
EXPECT_CALL(bitrate_allocator_, AddObserver(vss_impl.get(), _))
.WillOnce(Invoke(
[&](BitrateAllocatorObserver*, MediaStreamAllocationConfig config) {
EXPECT_EQ(config.min_bitrate_bps,
static_cast<uint32_t>(low_stream.min_bitrate_bps));
EXPECT_EQ(config.max_bitrate_bps,
static_cast<uint32_t>(low_stream.max_bitrate_bps +
high_stream.max_bitrate_bps));
EXPECT_EQ(config.pad_up_bitrate_bps,
static_cast<uint32_t>(min_transmit_bitrate_bps));
EXPECT_EQ(config.enforce_min_bitrate, !kSuspend);
EXPECT_EQ(config.has_packet_feedback, true);
}));
static_cast<VideoStreamEncoderInterface::EncoderSink*>(vss_impl.get())
->OnEncoderConfigurationChanged(
std::vector<VideoStream>{low_stream, high_stream},
min_transmit_bitrate_bps);
vss_impl->Stop();
});
}
TEST_F(VideoSendStreamImplTest, ReportFeedbackAvailability) {
test_queue_.SendTask([this] {
config_.rtp.extensions.emplace_back(
RtpExtension::kTransportSequenceNumberUri,
RtpExtension::kTransportSequenceNumberDefaultId);
auto vss_impl = CreateVideoSendStreamImpl(
kDefaultInitialBitrateBps, kDefaultBitratePriority,
VideoEncoderConfig::ContentType::kRealtimeVideo);
EXPECT_CALL(bitrate_allocator_, AddObserver(vss_impl.get(), _))
.WillOnce(Invoke(
[&](BitrateAllocatorObserver*, MediaStreamAllocationConfig config) {
EXPECT_EQ(config.has_packet_feedback, true);
}));
vss_impl->Start();
EXPECT_CALL(bitrate_allocator_, RemoveObserver(vss_impl.get())).Times(1);
vss_impl->Stop();
});
}
TEST_F(VideoSendStreamImplTest, SetsScreensharePacingFactorWithFeedback) {
test::ScopedFieldTrials alr_experiment(GetAlrProbingExperimentString());
test_queue_.SendTask([this] {
config_.rtp.extensions.emplace_back(
RtpExtension::kTransportSequenceNumberUri,
RtpExtension::kTransportSequenceNumberDefaultId);
EXPECT_CALL(transport_controller_,
SetPacingFactor(kAlrProbingExperimentPaceMultiplier))
.Times(1);
auto vss_impl = CreateVideoSendStreamImpl(
kDefaultInitialBitrateBps, kDefaultBitratePriority,
VideoEncoderConfig::ContentType::kScreen);
vss_impl->Start();
vss_impl->Stop();
});
}
TEST_F(VideoSendStreamImplTest, DoesNotSetPacingFactorWithoutFeedback) {
test::ScopedFieldTrials alr_experiment(GetAlrProbingExperimentString());
test_queue_.SendTask([this] {
EXPECT_CALL(transport_controller_, SetPacingFactor(_)).Times(0);
auto vss_impl = CreateVideoSendStreamImpl(
kDefaultInitialBitrateBps, kDefaultBitratePriority,
VideoEncoderConfig::ContentType::kScreen);
vss_impl->Start();
vss_impl->Stop();
});
}
TEST_F(VideoSendStreamImplTest, ForwardsVideoBitrateAllocationWhenEnabled) {
test_queue_.SendTask([this] {
EXPECT_CALL(transport_controller_, SetPacingFactor(_)).Times(0);
auto vss_impl = CreateVideoSendStreamImpl(
kDefaultInitialBitrateBps, kDefaultBitratePriority,
VideoEncoderConfig::ContentType::kScreen);
vss_impl->Start();
VideoBitrateAllocationObserver* const observer =
static_cast<VideoBitrateAllocationObserver*>(vss_impl.get());
// Populate a test instance of video bitrate allocation.
VideoBitrateAllocation alloc;
alloc.SetBitrate(0, 0, 10000);
alloc.SetBitrate(0, 1, 20000);
alloc.SetBitrate(1, 0, 30000);
alloc.SetBitrate(1, 1, 40000);
// Encoder starts out paused, don't forward allocation.
EXPECT_CALL(payload_router_, OnBitrateAllocationUpdated(alloc)).Times(0);
observer->OnBitrateAllocationUpdated(alloc);
// Unpause encoder, allocation should be passed through.
static_cast<BitrateAllocatorObserver*>(vss_impl.get())
->OnBitrateUpdated(100000, 0, 0, 0);
EXPECT_CALL(payload_router_, OnBitrateAllocationUpdated(alloc)).Times(1);
observer->OnBitrateAllocationUpdated(alloc);
// Pause encoder again, and block allocations.
static_cast<BitrateAllocatorObserver*>(vss_impl.get())
->OnBitrateUpdated(0, 0, 0, 0);
EXPECT_CALL(payload_router_, OnBitrateAllocationUpdated(alloc)).Times(0);
observer->OnBitrateAllocationUpdated(alloc);
vss_impl->Stop();
});
}
TEST_F(VideoSendStreamImplTest, ThrottlesVideoBitrateAllocationWhenTooSimilar) {
test_queue_.SendTask([this] {
auto vss_impl = CreateVideoSendStreamImpl(
kDefaultInitialBitrateBps, kDefaultBitratePriority,
VideoEncoderConfig::ContentType::kScreen);
vss_impl->Start();
// Unpause encoder, to allows allocations to be passed through.
static_cast<BitrateAllocatorObserver*>(vss_impl.get())
->OnBitrateUpdated(100000, 0, 0, 0);
VideoBitrateAllocationObserver* const observer =
static_cast<VideoBitrateAllocationObserver*>(vss_impl.get());
// Populate a test instance of video bitrate allocation.
VideoBitrateAllocation alloc;
alloc.SetBitrate(0, 0, 10000);
alloc.SetBitrate(0, 1, 20000);
alloc.SetBitrate(1, 0, 30000);
alloc.SetBitrate(1, 1, 40000);
// Initial value.
EXPECT_CALL(payload_router_, OnBitrateAllocationUpdated(alloc)).Times(1);
observer->OnBitrateAllocationUpdated(alloc);
VideoBitrateAllocation updated_alloc = alloc;
// Needs 10% increase in bitrate to trigger immediate forward.
const uint32_t base_layer_min_update_bitrate_bps =
alloc.GetBitrate(0, 0) + alloc.get_sum_bps() / 10;
// Too small increase, don't forward.
updated_alloc.SetBitrate(0, 0, base_layer_min_update_bitrate_bps - 1);
EXPECT_CALL(payload_router_, OnBitrateAllocationUpdated(_)).Times(0);
observer->OnBitrateAllocationUpdated(updated_alloc);
// Large enough increase, do forward.
updated_alloc.SetBitrate(0, 0, base_layer_min_update_bitrate_bps);
EXPECT_CALL(payload_router_, OnBitrateAllocationUpdated(updated_alloc))
.Times(1);
observer->OnBitrateAllocationUpdated(updated_alloc);
// This is now a decrease compared to last forward allocation, forward
// immediately.
updated_alloc.SetBitrate(0, 0, base_layer_min_update_bitrate_bps - 1);
EXPECT_CALL(payload_router_, OnBitrateAllocationUpdated(updated_alloc))
.Times(1);
observer->OnBitrateAllocationUpdated(updated_alloc);
vss_impl->Stop();
});
}
TEST_F(VideoSendStreamImplTest, ForwardsVideoBitrateAllocationOnLayerChange) {
test_queue_.SendTask([this] {
auto vss_impl = CreateVideoSendStreamImpl(
kDefaultInitialBitrateBps, kDefaultBitratePriority,
VideoEncoderConfig::ContentType::kScreen);
vss_impl->Start();
// Unpause encoder, to allows allocations to be passed through.
static_cast<BitrateAllocatorObserver*>(vss_impl.get())
->OnBitrateUpdated(100000, 0, 0, 0);
VideoBitrateAllocationObserver* const observer =
static_cast<VideoBitrateAllocationObserver*>(vss_impl.get());
// Populate a test instance of video bitrate allocation.
VideoBitrateAllocation alloc;
alloc.SetBitrate(0, 0, 10000);
alloc.SetBitrate(0, 1, 20000);
alloc.SetBitrate(1, 0, 30000);
alloc.SetBitrate(1, 1, 40000);
// Initial value.
EXPECT_CALL(payload_router_, OnBitrateAllocationUpdated(alloc)).Times(1);
observer->OnBitrateAllocationUpdated(alloc);
// Move some bitrate from one layer to a new one, but keep sum the same.
// Since layout has changed, immediately trigger forward.
VideoBitrateAllocation updated_alloc = alloc;
updated_alloc.SetBitrate(2, 0, 10000);
updated_alloc.SetBitrate(1, 1, alloc.GetBitrate(1, 1) - 10000);
EXPECT_EQ(alloc.get_sum_bps(), updated_alloc.get_sum_bps());
EXPECT_CALL(payload_router_, OnBitrateAllocationUpdated(updated_alloc))
.Times(1);
observer->OnBitrateAllocationUpdated(updated_alloc);
vss_impl->Stop();
});
}
TEST_F(VideoSendStreamImplTest, ForwardsVideoBitrateAllocationAfterTimeout) {
test_queue_.SendTask([this] {
rtc::ScopedFakeClock fake_clock;
fake_clock.SetTimeMicros(clock_.TimeInMicroseconds());
auto vss_impl = CreateVideoSendStreamImpl(
kDefaultInitialBitrateBps, kDefaultBitratePriority,
VideoEncoderConfig::ContentType::kScreen);
vss_impl->Start();
// Unpause encoder, to allows allocations to be passed through.
static_cast<BitrateAllocatorObserver*>(vss_impl.get())
->OnBitrateUpdated(100000, 0, 0, 0);
VideoBitrateAllocationObserver* const observer =
static_cast<VideoBitrateAllocationObserver*>(vss_impl.get());
// Populate a test instance of video bitrate allocation.
VideoBitrateAllocation alloc;
alloc.SetBitrate(0, 0, 10000);
alloc.SetBitrate(0, 1, 20000);
alloc.SetBitrate(1, 0, 30000);
alloc.SetBitrate(1, 1, 40000);
EncodedImage encoded_image;
CodecSpecificInfo codec_specific;
EXPECT_CALL(payload_router_, OnEncodedImage(_, _, _))
.WillRepeatedly(Return(
EncodedImageCallback::Result(EncodedImageCallback::Result::OK)));
// Max time we will throttle similar video bitrate allocations.
static constexpr int64_t kMaxVbaThrottleTimeMs = 500;
{
// Initial value.
EXPECT_CALL(payload_router_, OnBitrateAllocationUpdated(alloc)).Times(1);
observer->OnBitrateAllocationUpdated(alloc);
}
{
// Sending same allocation again, this one should be throttled.
EXPECT_CALL(payload_router_, OnBitrateAllocationUpdated(alloc)).Times(0);
observer->OnBitrateAllocationUpdated(alloc);
}
fake_clock.AdvanceTimeMicros(kMaxVbaThrottleTimeMs * 1000);
{
// Sending similar allocation again after timeout, should forward.
EXPECT_CALL(payload_router_, OnBitrateAllocationUpdated(alloc)).Times(1);
observer->OnBitrateAllocationUpdated(alloc);
}
{
// Sending similar allocation again without timeout, throttle.
EXPECT_CALL(payload_router_, OnBitrateAllocationUpdated(alloc)).Times(0);
observer->OnBitrateAllocationUpdated(alloc);
}
{
// Send encoded image, should be a noop.
EXPECT_CALL(payload_router_, OnBitrateAllocationUpdated(alloc)).Times(0);
static_cast<EncodedImageCallback*>(vss_impl.get())
->OnEncodedImage(encoded_image, &codec_specific, nullptr);
}
{
// Advance time and send encoded image, this should wake up and send
// cached bitrate allocation.
fake_clock.AdvanceTimeMicros(kMaxVbaThrottleTimeMs * 1000);
EXPECT_CALL(payload_router_, OnBitrateAllocationUpdated(alloc)).Times(1);
static_cast<EncodedImageCallback*>(vss_impl.get())
->OnEncodedImage(encoded_image, &codec_specific, nullptr);
}
{
// Advance time and send encoded image, there should be no cached
// allocation to send.
fake_clock.AdvanceTimeMicros(kMaxVbaThrottleTimeMs * 1000);
EXPECT_CALL(payload_router_, OnBitrateAllocationUpdated(alloc)).Times(0);
static_cast<EncodedImageCallback*>(vss_impl.get())
->OnEncodedImage(encoded_image, &codec_specific, nullptr);
}
vss_impl->Stop();
});
}
} // namespace internal
} // namespace webrtc
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