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Include protection bitrate in total max allocated bitrate

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This way we make sure we take fec into account when deciding how high
we probe.

Bug: webrtc:10070
Change-Id: I5286c82fc32dd99f7b9d79c9e5fc4465e1c6c259
Reviewed-on: https://webrtc-review.googlesource.com/c/113429
Reviewed-by: Sebastian Jansson <srte@webrtc.org>
Commit-Queue: Erik Språng <sprang@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#25930}
This commit is contained in:
Erik Språng 2018-12-06 17:31:25 +01:00 committed by Commit Bot
parent 120469086a
commit d1d7b23f89
2 changed files with 53 additions and 23 deletions
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7
call/bitrate_allocator.cc
View file

@ -227,7 +227,12 @@ void BitrateAllocator::UpdateAllocationLimits() {
std::max(config.MinBitrateWithHysteresis(), stream_padding); std::max(config.MinBitrateWithHysteresis(), stream_padding);
} }
total_requested_padding_bitrate += stream_padding; total_requested_padding_bitrate += stream_padding;
total_requested_max_bitrate += config.max_bitrate_bps; uint32_t max_bitrate_bps = config.max_bitrate_bps;
if (config.media_ratio > 0) {
max_bitrate_bps =
static_cast<uint32_t>(max_bitrate_bps / config.media_ratio);
}
total_requested_max_bitrate += max_bitrate_bps;
if (config.allocated_bitrate_bps > 0 && config.has_packet_feedback) if (config.allocated_bitrate_bps > 0 && config.has_packet_feedback)
has_packet_feedback = true; has_packet_feedback = true;
// TODO(srte): Remove field trial check. // TODO(srte): Remove field trial check.

69
call/bitrate_allocator_unittest.cc
View file

@ -335,12 +335,17 @@ TEST_F(BitrateAllocatorTestNoEnforceMin, ThreeBitrateObservers) {
} }
TEST_F(BitrateAllocatorTestNoEnforceMin, OneBitrateObserverWithPacketLoss) { TEST_F(BitrateAllocatorTestNoEnforceMin, OneBitrateObserverWithPacketLoss) {
TestBitrateObserver bitrate_observer; const uint32_t kMinBitrateBps = 100000;
const uint32_t kMaxBitrateBps = 400000;
// Hysteresis adds another 10% or 20kbps to min bitrate.
const uint32_t kMinStartBitrateBps =
kMinBitrateBps + std::max(20000u, kMinBitrateBps / 10);
// Expect OnAllocationLimitsChanged with |min_send_bitrate_bps| = 0 since // Expect OnAllocationLimitsChanged with |min_send_bitrate_bps| = 0 since
// AddObserver is called with |enforce_min_bitrate| = false. // AddObserver is called with |enforce_min_bitrate| = false.
EXPECT_CALL(limit_observer_, OnAllocationLimitsChanged(0, 0, _)); TestBitrateObserver bitrate_observer;
EXPECT_CALL(limit_observer_, OnAllocationLimitsChanged(0, 168000, _)); EXPECT_CALL(limit_observer_, OnAllocationLimitsChanged(0, 0, kMaxBitrateBps));
AddObserver(&bitrate_observer, 100000, 400000, 0, false, "", AddObserver(&bitrate_observer, kMinBitrateBps, kMaxBitrateBps, 0, false, "",
kDefaultBitratePriority); kDefaultBitratePriority);
EXPECT_EQ(300000, allocator_->GetStartBitrate(&bitrate_observer)); EXPECT_EQ(300000, allocator_->GetStartBitrate(&bitrate_observer));
@ -349,38 +354,58 @@ TEST_F(BitrateAllocatorTestNoEnforceMin, OneBitrateObserverWithPacketLoss) {
EXPECT_EQ(150000u, bitrate_observer.last_bitrate_bps_); EXPECT_EQ(150000u, bitrate_observer.last_bitrate_bps_);
// Add loss and use a part of the bitrate for protection. // Add loss and use a part of the bitrate for protection.
double protection_ratio = 0.4; const double kProtectionRatio = 0.4;
uint8_t fraction_loss = protection_ratio * 256; uint32_t target_bitrate_bps = 200000;
bitrate_observer.SetBitrateProtectionRatio(protection_ratio); const uint32_t kMaxBitrateWithProtectionBps =
allocator_->OnNetworkChanged(200000, 0, fraction_loss, static_cast<uint32_t>(kMaxBitrateBps / (1 - kProtectionRatio));
uint8_t fraction_loss = kProtectionRatio * 256;
bitrate_observer.SetBitrateProtectionRatio(kProtectionRatio);
EXPECT_CALL(limit_observer_,
OnAllocationLimitsChanged(0, 0, kMaxBitrateWithProtectionBps));
allocator_->OnNetworkChanged(target_bitrate_bps, 0, fraction_loss,
kDefaultProbingIntervalMs); kDefaultProbingIntervalMs);
EXPECT_EQ(200000u, bitrate_observer.last_bitrate_bps_); EXPECT_EQ(target_bitrate_bps, bitrate_observer.last_bitrate_bps_);
// Above the min threshold, but not enough given the protection used. // Above the min threshold, but not enough given the protection used.
allocator_->OnNetworkChanged(139000, 0, fraction_loss, // Limits changed, as we will video is now off and we need to pad up to the
// start bitrate.
target_bitrate_bps = kMinStartBitrateBps + 1000;
// Verify the hysteresis is added for the protection.
const uint32_t kMinStartBitrateWithProtectionBps =
static_cast<uint32_t>(kMinStartBitrateBps * (1 + kProtectionRatio));
EXPECT_CALL(limit_observer_,
OnAllocationLimitsChanged(0, kMinStartBitrateWithProtectionBps,
kMaxBitrateWithProtectionBps));
allocator_->OnNetworkChanged(kMinStartBitrateBps + 1000, 0, fraction_loss,
kDefaultProbingIntervalMs); kDefaultProbingIntervalMs);
EXPECT_EQ(0u, bitrate_observer.last_bitrate_bps_); EXPECT_EQ(0u, bitrate_observer.last_bitrate_bps_);
// Verify the hysteresis is added for the protection. allocator_->OnNetworkChanged(kMinStartBitrateWithProtectionBps - 1000, 0,
allocator_->OnNetworkChanged(150000, 0, fraction_loss, fraction_loss, kDefaultProbingIntervalMs);
kDefaultProbingIntervalMs);
EXPECT_EQ(0u, bitrate_observer.last_bitrate_bps_); EXPECT_EQ(0u, bitrate_observer.last_bitrate_bps_);
// Just enough to enable video again. // Just enough to enable video again.
EXPECT_CALL(limit_observer_, OnAllocationLimitsChanged(0, 0, _)); target_bitrate_bps = kMinStartBitrateWithProtectionBps;
allocator_->OnNetworkChanged(168000, 0, fraction_loss, EXPECT_CALL(limit_observer_,
kDefaultProbingIntervalMs); OnAllocationLimitsChanged(0, 0, kMaxBitrateWithProtectionBps));
EXPECT_EQ(168000u, bitrate_observer.last_bitrate_bps_); allocator_->OnNetworkChanged(kMinStartBitrateWithProtectionBps, 0,
fraction_loss, kDefaultProbingIntervalMs);
EXPECT_EQ(kMinStartBitrateWithProtectionBps,
bitrate_observer.last_bitrate_bps_);
// Remove all protection and make sure video is not paused as earlier. // Remove all protection and make sure video is not paused as earlier.
bitrate_observer.SetBitrateProtectionRatio(0.0); bitrate_observer.SetBitrateProtectionRatio(0.0);
allocator_->OnNetworkChanged(140000, 0, 0, kDefaultProbingIntervalMs); EXPECT_CALL(limit_observer_, OnAllocationLimitsChanged(0, 0, kMaxBitrateBps));
EXPECT_EQ(140000u, bitrate_observer.last_bitrate_bps_); allocator_->OnNetworkChanged(kMinStartBitrateWithProtectionBps - 1000, 0, 0,
kDefaultProbingIntervalMs);
EXPECT_EQ(kMinStartBitrateWithProtectionBps - 1000,
bitrate_observer.last_bitrate_bps_);
allocator_->OnNetworkChanged(139000, 0, 0, kDefaultProbingIntervalMs); allocator_->OnNetworkChanged(kMinStartBitrateBps, 0, 0,
EXPECT_EQ(139000u, bitrate_observer.last_bitrate_bps_); kDefaultProbingIntervalMs);
EXPECT_EQ(kMinStartBitrateBps, bitrate_observer.last_bitrate_bps_);
EXPECT_CALL(limit_observer_, OnAllocationLimitsChanged(0, 0, _)); EXPECT_CALL(limit_observer_, OnAllocationLimitsChanged(0, 0, 0));
allocator_->RemoveObserver(&bitrate_observer); allocator_->RemoveObserver(&bitrate_observer);
} }