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Fixes for support of disabling lower spatial layers in VP9

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1) Always allocate at least one spatial layer in svc rate allocator

2) Ensure tests reflect known existing failing scenario
(k-svc video with no external ref control).

3) Update log representation of bitrate allocation, as it looks very
confusing with lower layers disabled.

Was:
[
[],
[], [x, y, z]]
New:
[
[]
[]
[x,y,z]]

Bug: webrtc:10977
Change-Id: I248d9b44c8848710aa5a194a5c1b96df6a2734ac
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/154744
Reviewed-by: Niels Moller <nisse@webrtc.org>
Reviewed-by: Sergey Silkin <ssilkin@webrtc.org>
Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29345}
This commit is contained in:
Ilya Nikolaevskiy
2019-09-30 10:32:13 +02:00
committed by Commit Bot
parent 32eae4c231
commit 002b6f4f23
3 changed files with 170 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
api/video/video_bitrate_allocation.cc
View File

@ -151,7 +151,7 @@ std::string VideoBitrateAllocation::ToString() const {
break;
const uint32_t layer_sum = GetSpatialLayerSum(si);
if (layer_sum == sum_) {
if (layer_sum == sum_ && si == 0) {
ssb << " [";
} else {
if (si > 0)

7
modules/video_coding/codecs/vp9/svc_rate_allocator.cc
View File

@ -316,12 +316,15 @@ VideoBitrateAllocation SvcRateAllocator::GetAllocationScreenSharing(
DataRate total_bitrate,
size_t first_active_layer,
size_t num_spatial_layers) const {
VideoBitrateAllocation bitrate_allocation;
if (num_spatial_layers == 0 ||
total_bitrate <
DataRate::kbps(codec_.spatialLayers[first_active_layer].minBitrate)) {
return VideoBitrateAllocation();
// Always enable at least one layer.
bitrate_allocation.SetBitrate(first_active_layer, 0, total_bitrate.bps());
return bitrate_allocation;
}
VideoBitrateAllocation bitrate_allocation;
DataRate allocated_rate = DataRate::Zero();
DataRate top_layer_rate = DataRate::Zero();

164
modules/video_coding/codecs/vp9/test/vp9_impl_unittest.cc
View File

@ -353,6 +353,162 @@ TEST_F(TestVp9Impl, EnableDisableSpatialLayers) {
}
TEST_F(TestVp9Impl, DisableEnableBaseLayerTriggersKeyFrame) {
// Configure encoder to produce N spatial layers. Encode frames for all
// layers. Then disable all but the last layer. Then reenable all back again.
test::ScopedFieldTrials override_field_trials(
"WebRTC-Vp9ExternalRefCtrl/Enabled/");
const size_t num_spatial_layers = 3;
const size_t num_temporal_layers = 3;
// Must not be multiple of temporal period to exercise all code paths.
const size_t num_frames_to_encode = 5;
ConfigureSvc(num_spatial_layers, num_temporal_layers);
codec_settings_.VP9()->frameDroppingOn = false;
codec_settings_.VP9()->flexibleMode = false;
codec_settings_.VP9()->interLayerPred = InterLayerPredMode::kOnKeyPic;
codec_settings_.mode = VideoCodecMode::kRealtimeVideo;
EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK,
encoder_->InitEncode(&codec_settings_, kSettings));
VideoBitrateAllocation bitrate_allocation;
for (size_t sl_idx = 0; sl_idx < num_spatial_layers; ++sl_idx) {
for (size_t tl_idx = 0; tl_idx < num_temporal_layers; ++tl_idx) {
// Allocate high bit rate to avoid frame dropping due to rate control.
bitrate_allocation.SetBitrate(
sl_idx, tl_idx,
codec_settings_.spatialLayers[sl_idx].targetBitrate * 1000 * 2);
}
}
encoder_->SetRates(VideoEncoder::RateControlParameters(
bitrate_allocation, codec_settings_.maxFramerate));
for (size_t frame_num = 0; frame_num < num_frames_to_encode; ++frame_num) {
SetWaitForEncodedFramesThreshold(num_spatial_layers);
EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK,
encoder_->Encode(*NextInputFrame(), nullptr));
std::vector<EncodedImage> encoded_frame;
std::vector<CodecSpecificInfo> codec_specific_info;
ASSERT_TRUE(WaitForEncodedFrames(&encoded_frame, &codec_specific_info));
EXPECT_EQ(codec_specific_info[0].codecSpecific.VP9.ss_data_available,
frame_num == 0);
}
// Disable all but top layer.
for (size_t sl_idx = 0; sl_idx < num_spatial_layers - 1; ++sl_idx) {
for (size_t tl_idx = 0; tl_idx < num_temporal_layers; ++tl_idx) {
bitrate_allocation.SetBitrate(sl_idx, tl_idx, 0);
}
}
encoder_->SetRates(VideoEncoder::RateControlParameters(
bitrate_allocation, codec_settings_.maxFramerate));
bool seen_ss_data = false;
for (size_t frame_num = 0; frame_num < num_frames_to_encode; ++frame_num) {
SetWaitForEncodedFramesThreshold(1);
EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK,
encoder_->Encode(*NextInputFrame(), nullptr));
std::vector<EncodedImage> encoded_frame;
std::vector<CodecSpecificInfo> codec_specific_info;
ASSERT_TRUE(WaitForEncodedFrames(&encoded_frame, &codec_specific_info));
// SS available immediatly after switching on base temporal layer.
if (seen_ss_data) {
EXPECT_EQ(codec_specific_info[0].codecSpecific.VP9.ss_data_available,
false);
} else {
EXPECT_EQ(codec_specific_info[0].codecSpecific.VP9.ss_data_available,
codec_specific_info[0].codecSpecific.VP9.temporal_idx == 0);
seen_ss_data |=
codec_specific_info[0].codecSpecific.VP9.ss_data_available;
}
// No key-frames generated for disabling layers.
EXPECT_EQ(encoded_frame[0]._frameType, VideoFrameType::kVideoFrameDelta);
EXPECT_EQ(encoded_frame[0].SpatialIndex().value_or(-1), 2);
}
EXPECT_TRUE(seen_ss_data);
// Force key-frame.
std::vector<VideoFrameType> frame_types = {VideoFrameType::kVideoFrameKey};
SetWaitForEncodedFramesThreshold(1);
EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK,
encoder_->Encode(*NextInputFrame(), &frame_types));
std::vector<EncodedImage> encoded_frame;
std::vector<CodecSpecificInfo> codec_specific_info;
ASSERT_TRUE(WaitForEncodedFrames(&encoded_frame, &codec_specific_info));
// Key-frame should be produced.
EXPECT_EQ(encoded_frame[0]._frameType, VideoFrameType::kVideoFrameKey);
EXPECT_EQ(encoded_frame[0].SpatialIndex().value_or(-1), 2);
// Encode some more frames.
for (size_t frame_num = 0; frame_num < num_frames_to_encode; ++frame_num) {
SetWaitForEncodedFramesThreshold(1);
EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK,
encoder_->Encode(*NextInputFrame(), nullptr));
std::vector<EncodedImage> encoded_frame;
std::vector<CodecSpecificInfo> codec_specific_info;
ASSERT_TRUE(WaitForEncodedFrames(&encoded_frame, &codec_specific_info));
EXPECT_EQ(encoded_frame[0]._frameType, VideoFrameType::kVideoFrameDelta);
EXPECT_EQ(encoded_frame[0].SpatialIndex().value_or(-1), 2);
}
// Enable the second layer back.
// Allocate high bit rate to avoid frame dropping due to rate control.
for (size_t tl_idx = 0; tl_idx < num_temporal_layers; ++tl_idx) {
bitrate_allocation.SetBitrate(
1, tl_idx, codec_settings_.spatialLayers[0].targetBitrate * 1000 * 2);
}
encoder_->SetRates(VideoEncoder::RateControlParameters(
bitrate_allocation, codec_settings_.maxFramerate));
for (size_t frame_num = 0; frame_num < num_frames_to_encode; ++frame_num) {
SetWaitForEncodedFramesThreshold(2);
EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK,
encoder_->Encode(*NextInputFrame(), nullptr));
std::vector<EncodedImage> encoded_frame;
std::vector<CodecSpecificInfo> codec_specific_info;
ASSERT_TRUE(WaitForEncodedFrames(&encoded_frame, &codec_specific_info));
ASSERT_EQ(encoded_frame.size(), 2u);
// SS available immediatly after switching on.
EXPECT_EQ(codec_specific_info[0].codecSpecific.VP9.ss_data_available,
frame_num == 0);
// Keyframe should be generated when enabling lower layers.
const VideoFrameType expected_type = frame_num == 0
? VideoFrameType::kVideoFrameKey
: VideoFrameType::kVideoFrameDelta;
EXPECT_EQ(encoded_frame[0]._frameType, expected_type);
EXPECT_EQ(encoded_frame[0].SpatialIndex().value_or(-1), 1);
EXPECT_EQ(encoded_frame[1].SpatialIndex().value_or(-1), 2);
}
// Enable the first layer back.
// Allocate high bit rate to avoid frame dropping due to rate control.
for (size_t tl_idx = 0; tl_idx < num_temporal_layers; ++tl_idx) {
bitrate_allocation.SetBitrate(
0, tl_idx, codec_settings_.spatialLayers[1].targetBitrate * 1000 * 2);
}
encoder_->SetRates(VideoEncoder::RateControlParameters(
bitrate_allocation, codec_settings_.maxFramerate));
for (size_t frame_num = 0; frame_num < num_frames_to_encode; ++frame_num) {
SetWaitForEncodedFramesThreshold(num_spatial_layers);
EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK,
encoder_->Encode(*NextInputFrame(), nullptr));
std::vector<EncodedImage> encoded_frame;
std::vector<CodecSpecificInfo> codec_specific_info;
ASSERT_TRUE(WaitForEncodedFrames(&encoded_frame, &codec_specific_info));
ASSERT_EQ(encoded_frame.size(), 3u);
// SS available immediatly after switching on.
EXPECT_EQ(codec_specific_info[0].codecSpecific.VP9.ss_data_available,
frame_num == 0);
// Keyframe should be generated when enabling lower layers.
const VideoFrameType expected_type = frame_num == 0
? VideoFrameType::kVideoFrameKey
: VideoFrameType::kVideoFrameDelta;
EXPECT_EQ(encoded_frame[0]._frameType, expected_type);
}
}
TEST_F(TestVp9Impl, DisableEnableBaseLayerTriggersKeyFrameForScreenshare) {
// Configure encoder to produce N spatial layers. Encode frames for all
// layers. Then disable all but the last layer. Then reenable all back again.
const size_t num_spatial_layers = 3;
@ -360,6 +516,9 @@ TEST_F(TestVp9Impl, DisableEnableBaseLayerTriggersKeyFrame) {
ConfigureSvc(num_spatial_layers);
codec_settings_.VP9()->frameDroppingOn = false;
codec_settings_.mode = VideoCodecMode::kScreensharing;
codec_settings_.VP9()->interLayerPred = InterLayerPredMode::kOn;
codec_settings_.VP9()->flexibleMode = true;
EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK,
encoder_->InitEncode(&codec_settings_, kSettings));
@ -404,6 +563,7 @@ TEST_F(TestVp9Impl, DisableEnableBaseLayerTriggersKeyFrame) {
frame_num == 0);
// No key-frames generated for disabling layers.
EXPECT_EQ(encoded_frame[0]._frameType, VideoFrameType::kVideoFrameDelta);
EXPECT_EQ(encoded_frame[0].SpatialIndex().value_or(-1), 2);
}
// Force key-frame.
@ -431,6 +591,7 @@ TEST_F(TestVp9Impl, DisableEnableBaseLayerTriggersKeyFrame) {
std::vector<EncodedImage> encoded_frame;
std::vector<CodecSpecificInfo> codec_specific_info;
ASSERT_TRUE(WaitForEncodedFrames(&encoded_frame, &codec_specific_info));
ASSERT_EQ(encoded_frame.size(), 2u);
// SS available immediatly after switching on.
EXPECT_EQ(codec_specific_info[0].codecSpecific.VP9.ss_data_available,
frame_num == 0);
@ -439,6 +600,8 @@ TEST_F(TestVp9Impl, DisableEnableBaseLayerTriggersKeyFrame) {
? VideoFrameType::kVideoFrameKey
: VideoFrameType::kVideoFrameDelta;
EXPECT_EQ(encoded_frame[0]._frameType, expected_type);
EXPECT_EQ(encoded_frame[0].SpatialIndex().value_or(-1), 1);
EXPECT_EQ(encoded_frame[1].SpatialIndex().value_or(-1), 2);
}
// Enable the first layer back.
@ -455,6 +618,7 @@ TEST_F(TestVp9Impl, DisableEnableBaseLayerTriggersKeyFrame) {
std::vector<EncodedImage> encoded_frame;
std::vector<CodecSpecificInfo> codec_specific_info;
ASSERT_TRUE(WaitForEncodedFrames(&encoded_frame, &codec_specific_info));
ASSERT_EQ(encoded_frame.size(), 3u);
// SS available immediatly after switching on.
EXPECT_EQ(codec_specific_info[0].codecSpecific.VP9.ss_data_available,
frame_num == 0);