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/*
* Copyright (c) 2017 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 "modules/video_coding/include/video_codec_initializer.h"
#include <stddef.h>
#include <stdint.h>
#include <memory>
#include "absl/types/optional.h"
#include "api/environment/environment.h"
#include "api/environment/environment_factory.h"
#include "api/scoped_refptr.h"
#include "api/test/mock_fec_controller_override.h"
#include "api/video/builtin_video_bitrate_allocator_factory.h"
#include "api/video/video_bitrate_allocation.h"
#include "api/video/video_bitrate_allocator.h"
#include "api/video/video_bitrate_allocator_factory.h"
#include "api/video_codecs/video_encoder.h"
#include "api/video_codecs/vp8_temporal_layers.h"
#include "api/video_codecs/vp8_temporal_layers_factory.h"
#include "modules/video_coding/codecs/vp9/include/vp9_globals.h"
#include "rtc_base/checks.h"
#include "test/explicit_key_value_config.h"
#include "test/gmock.h"
#include "test/gtest.h"
namespace webrtc {
namespace {
static const int kDefaultWidth = 1280;
static const int kDefaultHeight = 720;
static const int kDefaultFrameRate = 30;
static const uint32_t kDefaultMinBitrateBps = 60000;
static const uint32_t kDefaultTargetBitrateBps = 2000000;
static const uint32_t kDefaultMaxBitrateBps = 2000000;
static const uint32_t kDefaultMinTransmitBitrateBps = 400000;
static const int kDefaultMaxQp = 48;
static const uint32_t kScreenshareTl0BitrateBps = 120000;
static const uint32_t kScreenshareConferenceTl0BitrateBps = 200000;
static const uint32_t kScreenshareCodecTargetBitrateBps = 200000;
static const uint32_t kScreenshareDefaultFramerate = 5;
// Bitrates for the temporal layers of the higher screenshare simulcast stream.
static const uint32_t kHighScreenshareTl0Bps = 800000;
static const uint32_t kHighScreenshareTl1Bps = 1200000;
} // namespace
// TODO(sprang): Extend coverage to handle the rest of the codec initializer.
class VideoCodecInitializerTest : public ::testing::Test {
public:
VideoCodecInitializerTest() {}
virtual ~VideoCodecInitializerTest() {}
protected:
void SetUpFor(VideoCodecType type,
absl::optional<int> num_simulcast_streams,
absl::optional<int> num_spatial_streams,
int num_temporal_streams,
bool screenshare) {
config_ = VideoEncoderConfig();
config_.codec_type = type;
if (screenshare) {
config_.min_transmit_bitrate_bps = kDefaultMinTransmitBitrateBps;
config_.content_type = VideoEncoderConfig::ContentType::kScreen;
}
if (num_simulcast_streams.has_value()) {
config_.number_of_streams = num_simulcast_streams.value();
}
if (type == VideoCodecType::kVideoCodecVP8) {
ASSERT_FALSE(num_spatial_streams.has_value());
VideoCodecVP8 vp8_settings = VideoEncoder::GetDefaultVp8Settings();
vp8_settings.numberOfTemporalLayers = num_temporal_streams;
config_.encoder_specific_settings = rtc::make_ref_counted<
webrtc::VideoEncoderConfig::Vp8EncoderSpecificSettings>(vp8_settings);
} else if (type == VideoCodecType::kVideoCodecVP9) {
ASSERT_TRUE(num_spatial_streams.has_value());
VideoCodecVP9 vp9_settings = VideoEncoder::GetDefaultVp9Settings();
vp9_settings.numberOfSpatialLayers = num_spatial_streams.value();
vp9_settings.numberOfTemporalLayers = num_temporal_streams;
config_.encoder_specific_settings = rtc::make_ref_counted<
webrtc::VideoEncoderConfig::Vp9EncoderSpecificSettings>(vp9_settings);
}
}
void InitializeCodec() {
frame_buffer_controller_.reset();
codec_out_ = VideoCodecInitializer::SetupCodec(env_.field_trials(), config_,
streams_);
bitrate_allocator_ =
CreateBuiltinVideoBitrateAllocatorFactory()->Create(env_, codec_out_);
RTC_CHECK(bitrate_allocator_);
// Make sure temporal layers instances have been created.
if (codec_out_.codecType == VideoCodecType::kVideoCodecVP8) {
Vp8TemporalLayersFactory factory;
const VideoEncoder::Settings settings(VideoEncoder::Capabilities(false),
1, 1000);
frame_buffer_controller_ =
factory.Create(codec_out_, settings, &fec_controller_override_);
}
}
VideoStream DefaultStream(
int width = kDefaultWidth,
int height = kDefaultHeight,
absl::optional<ScalabilityMode> scalability_mode = absl::nullopt) {
VideoStream stream;
stream.width = width;
stream.height = height;
stream.max_framerate = kDefaultFrameRate;
stream.min_bitrate_bps = kDefaultMinBitrateBps;
stream.target_bitrate_bps = kDefaultTargetBitrateBps;
stream.max_bitrate_bps = kDefaultMaxBitrateBps;
stream.max_qp = kDefaultMaxQp;
stream.num_temporal_layers = 1;
stream.active = true;
stream.scalability_mode = scalability_mode;
return stream;
}
VideoStream DefaultScreenshareStream() {
VideoStream stream = DefaultStream();
stream.min_bitrate_bps = 30000;
stream.target_bitrate_bps = kScreenshareCodecTargetBitrateBps;
stream.max_bitrate_bps = 1000000;
stream.max_framerate = kScreenshareDefaultFramerate;
stream.num_temporal_layers = 2;
stream.active = true;
return stream;
}
const Environment env_ = CreateEnvironment();
MockFecControllerOverride fec_controller_override_;
// Input settings.
VideoEncoderConfig config_;
std::vector<VideoStream> streams_;
// Output.
VideoCodec codec_out_;
std::unique_ptr<VideoBitrateAllocator> bitrate_allocator_;
std::unique_ptr<Vp8FrameBufferController> frame_buffer_controller_;
};
TEST_F(VideoCodecInitializerTest, SingleStreamVp8Screenshare) {
SetUpFor(VideoCodecType::kVideoCodecVP8, 1, absl::nullopt, 1, true);
streams_.push_back(DefaultStream());
InitializeCodec();
VideoBitrateAllocation bitrate_allocation =
bitrate_allocator_->Allocate(VideoBitrateAllocationParameters(
kDefaultTargetBitrateBps, kDefaultFrameRate));
EXPECT_EQ(1u, codec_out_.numberOfSimulcastStreams);
EXPECT_EQ(1u, codec_out_.VP8()->numberOfTemporalLayers);
EXPECT_EQ(kDefaultTargetBitrateBps, bitrate_allocation.get_sum_bps());
}
TEST_F(VideoCodecInitializerTest, SingleStreamVp8ScreenshareInactive) {
SetUpFor(VideoCodecType::kVideoCodecVP8, 1, absl::nullopt, 1, true);
VideoStream inactive_stream = DefaultStream();
inactive_stream.active = false;
streams_.push_back(inactive_stream);
InitializeCodec();
VideoBitrateAllocation bitrate_allocation =
bitrate_allocator_->Allocate(VideoBitrateAllocationParameters(
kDefaultTargetBitrateBps, kDefaultFrameRate));
EXPECT_EQ(1u, codec_out_.numberOfSimulcastStreams);
EXPECT_EQ(1u, codec_out_.VP8()->numberOfTemporalLayers);
EXPECT_EQ(0U, bitrate_allocation.get_sum_bps());
}
TEST_F(VideoCodecInitializerTest, TemporalLayeredVp8ScreenshareConference) {
SetUpFor(VideoCodecType::kVideoCodecVP8, 1, absl::nullopt, 2, true);
streams_.push_back(DefaultScreenshareStream());
InitializeCodec();
bitrate_allocator_->SetLegacyConferenceMode(true);
EXPECT_EQ(1u, codec_out_.numberOfSimulcastStreams);
EXPECT_EQ(2u, codec_out_.VP8()->numberOfTemporalLayers);
VideoBitrateAllocation bitrate_allocation =
bitrate_allocator_->Allocate(VideoBitrateAllocationParameters(
kScreenshareCodecTargetBitrateBps, kScreenshareDefaultFramerate));
EXPECT_EQ(kScreenshareCodecTargetBitrateBps,
bitrate_allocation.get_sum_bps());
EXPECT_EQ(kScreenshareConferenceTl0BitrateBps,
bitrate_allocation.GetBitrate(0, 0));
}
TEST_F(VideoCodecInitializerTest, TemporalLayeredVp8Screenshare) {
SetUpFor(VideoCodecType::kVideoCodecVP8, 1, absl::nullopt, 2, true);
streams_.push_back(DefaultScreenshareStream());
InitializeCodec();
EXPECT_EQ(1u, codec_out_.numberOfSimulcastStreams);
EXPECT_EQ(2u, codec_out_.VP8()->numberOfTemporalLayers);
VideoBitrateAllocation bitrate_allocation =
bitrate_allocator_->Allocate(VideoBitrateAllocationParameters(
kScreenshareCodecTargetBitrateBps, kScreenshareDefaultFramerate));
EXPECT_EQ(kScreenshareCodecTargetBitrateBps,
bitrate_allocation.get_sum_bps());
EXPECT_EQ(kScreenshareTl0BitrateBps, bitrate_allocation.GetBitrate(0, 0));
}
TEST_F(VideoCodecInitializerTest, SimulcastVp8Screenshare) {
SetUpFor(VideoCodecType::kVideoCodecVP8, 2, absl::nullopt, 1, true);
streams_.push_back(DefaultScreenshareStream());
VideoStream video_stream = DefaultStream();
video_stream.max_framerate = kScreenshareDefaultFramerate;
streams_.push_back(video_stream);
InitializeCodec();
EXPECT_EQ(2u, codec_out_.numberOfSimulcastStreams);
EXPECT_EQ(1u, codec_out_.VP8()->numberOfTemporalLayers);
const uint32_t max_bitrate_bps =
streams_[0].target_bitrate_bps + streams_[1].max_bitrate_bps;
VideoBitrateAllocation bitrate_allocation =
bitrate_allocator_->Allocate(VideoBitrateAllocationParameters(
max_bitrate_bps, kScreenshareDefaultFramerate));
EXPECT_EQ(max_bitrate_bps, bitrate_allocation.get_sum_bps());
EXPECT_EQ(static_cast<uint32_t>(streams_[0].target_bitrate_bps),
bitrate_allocation.GetSpatialLayerSum(0));
EXPECT_EQ(static_cast<uint32_t>(streams_[1].max_bitrate_bps),
bitrate_allocation.GetSpatialLayerSum(1));
}
// Tests that when a video stream is inactive, then the bitrate allocation will
// be 0 for that stream.
TEST_F(VideoCodecInitializerTest, SimulcastVp8ScreenshareInactive) {
SetUpFor(VideoCodecType::kVideoCodecVP8, 2, absl::nullopt, 1, true);
streams_.push_back(DefaultScreenshareStream());
VideoStream inactive_video_stream = DefaultStream();
inactive_video_stream.active = false;
inactive_video_stream.max_framerate = kScreenshareDefaultFramerate;
streams_.push_back(inactive_video_stream);
InitializeCodec();
EXPECT_EQ(2u, codec_out_.numberOfSimulcastStreams);
EXPECT_EQ(1u, codec_out_.VP8()->numberOfTemporalLayers);
const uint32_t target_bitrate =
streams_[0].target_bitrate_bps + streams_[1].target_bitrate_bps;
VideoBitrateAllocation bitrate_allocation =
bitrate_allocator_->Allocate(VideoBitrateAllocationParameters(
target_bitrate, kScreenshareDefaultFramerate));
EXPECT_EQ(static_cast<uint32_t>(streams_[0].max_bitrate_bps),
bitrate_allocation.get_sum_bps());
EXPECT_EQ(static_cast<uint32_t>(streams_[0].max_bitrate_bps),
bitrate_allocation.GetSpatialLayerSum(0));
EXPECT_EQ(0U, bitrate_allocation.GetSpatialLayerSum(1));
}
TEST_F(VideoCodecInitializerTest, HighFpsSimulcastVp8Screenshare) {
// Two simulcast streams, the lower one using legacy settings (two temporal
// streams, 5fps), the higher one using 3 temporal streams and 30fps.
SetUpFor(VideoCodecType::kVideoCodecVP8, 2, absl::nullopt, 3, true);
streams_.push_back(DefaultScreenshareStream());
VideoStream video_stream = DefaultStream();
video_stream.num_temporal_layers = 3;
streams_.push_back(video_stream);
InitializeCodec();
EXPECT_EQ(2u, codec_out_.numberOfSimulcastStreams);
EXPECT_EQ(3u, codec_out_.VP8()->numberOfTemporalLayers);
const uint32_t max_bitrate_bps =
streams_[0].target_bitrate_bps + streams_[1].max_bitrate_bps;
VideoBitrateAllocation bitrate_allocation = bitrate_allocator_->Allocate(
VideoBitrateAllocationParameters(max_bitrate_bps, kDefaultFrameRate));
EXPECT_EQ(max_bitrate_bps, bitrate_allocation.get_sum_bps());
EXPECT_EQ(static_cast<uint32_t>(streams_[0].target_bitrate_bps),
bitrate_allocation.GetSpatialLayerSum(0));
EXPECT_EQ(static_cast<uint32_t>(streams_[1].max_bitrate_bps),
bitrate_allocation.GetSpatialLayerSum(1));
EXPECT_EQ(kHighScreenshareTl0Bps, bitrate_allocation.GetBitrate(1, 0));
EXPECT_EQ(kHighScreenshareTl1Bps - kHighScreenshareTl0Bps,
bitrate_allocation.GetBitrate(1, 1));
}
TEST_F(VideoCodecInitializerTest, Vp9SvcDefaultLayering) {
SetUpFor(VideoCodecType::kVideoCodecVP9, absl::nullopt, 3, 3, false);
VideoStream stream = DefaultStream();
stream.num_temporal_layers = 3;
streams_.push_back(stream);
InitializeCodec();
EXPECT_EQ(codec_out_.VP9()->numberOfSpatialLayers, 3u);
EXPECT_EQ(codec_out_.VP9()->numberOfTemporalLayers, 3u);
}
TEST_F(VideoCodecInitializerTest, Vp9SvcAdjustedLayering) {
SetUpFor(VideoCodecType::kVideoCodecVP9, absl::nullopt, 3, 3, false);
VideoStream stream = DefaultStream();
stream.num_temporal_layers = 3;
// Set resolution which is only enough to produce 2 spatial layers.
stream.width = kMinVp9SpatialLayerLongSideLength * 2;
stream.height = kMinVp9SpatialLayerShortSideLength * 2;
streams_.push_back(stream);
InitializeCodec();
EXPECT_EQ(codec_out_.VP9()->numberOfSpatialLayers, 2u);
}
TEST_F(VideoCodecInitializerTest,
Vp9SingleSpatialLayerMaxBitrateIsEqualToCodecMaxBitrate) {
SetUpFor(VideoCodecType::kVideoCodecVP9, absl::nullopt, 1, 3, false);
VideoStream stream = DefaultStream();
stream.num_temporal_layers = 3;
streams_.push_back(stream);
InitializeCodec();
EXPECT_EQ(codec_out_.spatialLayers[0].maxBitrate,
kDefaultMaxBitrateBps / 1000);
}
TEST_F(VideoCodecInitializerTest,
Vp9SingleSpatialLayerMaxBitrateIsEqualToCodecMaxBitrateWithL1T1) {
SetUpFor(VideoCodecType::kVideoCodecVP9, 1, 1, 1, false);
VideoStream stream = DefaultStream();
stream.num_temporal_layers = 1;
stream.scalability_mode = ScalabilityMode::kL1T1;
streams_.push_back(stream);
InitializeCodec();
EXPECT_EQ(1u, codec_out_.VP9()->numberOfSpatialLayers);
EXPECT_EQ(codec_out_.spatialLayers[0].minBitrate,
kDefaultMinBitrateBps / 1000);
EXPECT_EQ(codec_out_.spatialLayers[0].maxBitrate,
kDefaultMaxBitrateBps / 1000);
}
TEST_F(VideoCodecInitializerTest,
Vp9SingleSpatialLayerTargetBitrateIsEqualToCodecMaxBitrate) {
SetUpFor(VideoCodecType::kVideoCodecVP9, absl::nullopt, 1, 1, true);
VideoStream stream = DefaultStream();
stream.num_temporal_layers = 1;
streams_.push_back(stream);
InitializeCodec();
EXPECT_EQ(codec_out_.spatialLayers[0].targetBitrate,
kDefaultMaxBitrateBps / 1000);
}
TEST_F(VideoCodecInitializerTest,
Vp9KeepBitrateLimitsIfNumberOfSpatialLayersIsReducedToOne) {
// Request 3 spatial layers for 320x180 input. Actual number of layers will be
// reduced to 1 due to low input resolution but SVC bitrate limits should be
// applied.
SetUpFor(VideoCodecType::kVideoCodecVP9, absl::nullopt, 3, 3, false);
VideoStream stream = DefaultStream();
stream.width = 320;
stream.height = 180;
stream.num_temporal_layers = 3;
streams_.push_back(stream);
InitializeCodec();
EXPECT_LT(codec_out_.spatialLayers[0].maxBitrate,
kDefaultMaxBitrateBps / 1000);
}
TEST_F(VideoCodecInitializerTest,
Vp9KeepBitrateLimitsIfNumberOfSpatialLayersIsReducedToOneWithL3T1) {
// Request 3 spatial layers for 320x180 input. Actual number of layers will be
// reduced to 1 due to low input resolution but SVC bitrate limits should be
// applied.
SetUpFor(VideoCodecType::kVideoCodecVP9, 1, 3, 1, false);
VideoStream stream = DefaultStream();
stream.width = 320;
stream.height = 180;
stream.num_temporal_layers = 1;
stream.scalability_mode = ScalabilityMode::kL3T1;
streams_.push_back(stream);
InitializeCodec();
EXPECT_EQ(1u, codec_out_.VP9()->numberOfSpatialLayers);
EXPECT_LT(codec_out_.spatialLayers[0].minBitrate,
kDefaultMinBitrateBps / 1000);
EXPECT_LT(codec_out_.spatialLayers[0].maxBitrate,
kDefaultMaxBitrateBps / 1000);
}
TEST_F(VideoCodecInitializerTest, Vp9DeactivateLayers) {
SetUpFor(VideoCodecType::kVideoCodecVP9, absl::nullopt, 3, 1, false);
VideoStream stream = DefaultStream();
streams_.push_back(stream);
config_.simulcast_layers.resize(3);
// Activate all layers.
config_.simulcast_layers[0].active = true;
config_.simulcast_layers[1].active = true;
config_.simulcast_layers[2].active = true;
InitializeCodec();
EXPECT_EQ(codec_out_.VP9()->numberOfSpatialLayers, 3);
EXPECT_TRUE(codec_out_.spatialLayers[0].active);
EXPECT_TRUE(codec_out_.spatialLayers[1].active);
EXPECT_TRUE(codec_out_.spatialLayers[2].active);
// Deactivate top layer.
config_.simulcast_layers[0].active = true;
config_.simulcast_layers[1].active = true;
config_.simulcast_layers[2].active = false;
InitializeCodec();
EXPECT_EQ(codec_out_.VP9()->numberOfSpatialLayers, 3);
EXPECT_TRUE(codec_out_.spatialLayers[0].active);
EXPECT_TRUE(codec_out_.spatialLayers[1].active);
EXPECT_FALSE(codec_out_.spatialLayers[2].active);
// Deactivate middle layer.
config_.simulcast_layers[0].active = true;
config_.simulcast_layers[1].active = false;
config_.simulcast_layers[2].active = true;
InitializeCodec();
EXPECT_EQ(codec_out_.VP9()->numberOfSpatialLayers, 3);
EXPECT_TRUE(codec_out_.spatialLayers[0].active);
EXPECT_FALSE(codec_out_.spatialLayers[1].active);
EXPECT_TRUE(codec_out_.spatialLayers[2].active);
// Deactivate first layer.
config_.simulcast_layers[0].active = false;
config_.simulcast_layers[1].active = true;
config_.simulcast_layers[2].active = true;
InitializeCodec();
EXPECT_EQ(codec_out_.VP9()->numberOfSpatialLayers, 2);
EXPECT_TRUE(codec_out_.spatialLayers[0].active);
EXPECT_TRUE(codec_out_.spatialLayers[1].active);
// HD singlecast.
config_.simulcast_layers[0].active = false;
config_.simulcast_layers[1].active = false;
config_.simulcast_layers[2].active = true;
InitializeCodec();
EXPECT_EQ(codec_out_.VP9()->numberOfSpatialLayers, 1);
EXPECT_TRUE(codec_out_.spatialLayers[0].active);
// VGA singlecast.
config_.simulcast_layers[0].active = false;
config_.simulcast_layers[1].active = true;
config_.simulcast_layers[2].active = false;
InitializeCodec();
EXPECT_EQ(codec_out_.VP9()->numberOfSpatialLayers, 2);
EXPECT_TRUE(codec_out_.spatialLayers[0].active);
EXPECT_FALSE(codec_out_.spatialLayers[1].active);
// QVGA singlecast.
config_.simulcast_layers[0].active = true;
config_.simulcast_layers[1].active = false;
config_.simulcast_layers[2].active = false;
InitializeCodec();
EXPECT_EQ(codec_out_.VP9()->numberOfSpatialLayers, 3);
EXPECT_TRUE(codec_out_.spatialLayers[0].active);
EXPECT_FALSE(codec_out_.spatialLayers[1].active);
EXPECT_FALSE(codec_out_.spatialLayers[2].active);
}
TEST_F(VideoCodecInitializerTest, Vp9SvcResolutionAlignment) {
SetUpFor(VideoCodecType::kVideoCodecVP9, absl::nullopt, 3, 3, false);
VideoStream stream = DefaultStream();
stream.width = 1281;
stream.height = 721;
stream.num_temporal_layers = 3;
streams_.push_back(stream);
InitializeCodec();
EXPECT_EQ(codec_out_.width, 1280);
EXPECT_EQ(codec_out_.height, 720);
EXPECT_EQ(codec_out_.numberOfSimulcastStreams, 1);
EXPECT_EQ(codec_out_.simulcastStream[0].width, 1280);
EXPECT_EQ(codec_out_.simulcastStream[0].height, 720);
}
TEST_F(VideoCodecInitializerTest, Vp9SimulcastResolutions) {
// 3 x L1T3
SetUpFor(VideoCodecType::kVideoCodecVP9, 3, 1, 3, false);
// Scalability mode has to be set on all layers to avoid legacy SVC paths.
streams_ = {DefaultStream(320, 180, ScalabilityMode::kL1T3),
DefaultStream(640, 360, ScalabilityMode::kL1T3),
DefaultStream(1280, 720, ScalabilityMode::kL1T3)};
InitializeCodec();
// This is expected to be the largest layer.
EXPECT_EQ(codec_out_.width, 1280);
EXPECT_EQ(codec_out_.height, 720);
// `simulcastStream` is expected to be the same as the input (same order).
EXPECT_EQ(codec_out_.numberOfSimulcastStreams, 3);
EXPECT_EQ(codec_out_.simulcastStream[0].width, 320);
EXPECT_EQ(codec_out_.simulcastStream[0].height, 180);
EXPECT_EQ(codec_out_.simulcastStream[1].width, 640);
EXPECT_EQ(codec_out_.simulcastStream[1].height, 360);
EXPECT_EQ(codec_out_.simulcastStream[2].width, 1280);
EXPECT_EQ(codec_out_.simulcastStream[2].height, 720);
}
TEST_F(VideoCodecInitializerTest, Av1SingleSpatialLayerBitratesAreConsistent) {
VideoEncoderConfig config;
config.codec_type = VideoCodecType::kVideoCodecAV1;
std::vector<VideoStream> streams = {DefaultStream()};
streams[0].scalability_mode = ScalabilityMode::kL1T2;
VideoCodec codec =
VideoCodecInitializer::SetupCodec(env_.field_trials(), config, streams);
EXPECT_GE(codec.spatialLayers[0].targetBitrate,
codec.spatialLayers[0].minBitrate);
EXPECT_LE(codec.spatialLayers[0].targetBitrate,
codec.spatialLayers[0].maxBitrate);
}
TEST_F(VideoCodecInitializerTest, Av1TwoSpatialLayersBitratesAreConsistent) {
VideoEncoderConfig config;
config.codec_type = VideoCodecType::kVideoCodecAV1;
std::vector<VideoStream> streams = {DefaultStream()};
streams[0].scalability_mode = ScalabilityMode::kL2T2;
VideoCodec codec =
VideoCodecInitializer::SetupCodec(env_.field_trials(), config, streams);
EXPECT_GE(codec.spatialLayers[0].targetBitrate,
codec.spatialLayers[0].minBitrate);
EXPECT_LE(codec.spatialLayers[0].targetBitrate,
codec.spatialLayers[0].maxBitrate);
EXPECT_GE(codec.spatialLayers[1].targetBitrate,
codec.spatialLayers[1].minBitrate);
EXPECT_LE(codec.spatialLayers[1].targetBitrate,
codec.spatialLayers[1].maxBitrate);
}
TEST_F(VideoCodecInitializerTest, Av1ConfiguredMinBitrateApplied) {
VideoEncoderConfig config;
config.simulcast_layers.resize(1);
config.simulcast_layers[0].min_bitrate_bps = 28000;
config.codec_type = VideoCodecType::kVideoCodecAV1;
std::vector<VideoStream> streams = {DefaultStream()};
streams[0].scalability_mode = ScalabilityMode::kL3T2;
VideoCodec codec =
VideoCodecInitializer::SetupCodec(env_.field_trials(), config, streams);
EXPECT_EQ(codec.spatialLayers[0].minBitrate, 28u);
EXPECT_GE(codec.spatialLayers[0].targetBitrate,
codec.spatialLayers[0].minBitrate);
}
TEST_F(VideoCodecInitializerTest,
Av1ConfiguredMinBitrateLimitedByDefaultTargetBitrate) {
VideoEncoderConfig config;
config.simulcast_layers.resize(1);
config.simulcast_layers[0].min_bitrate_bps = 2228000;
config.codec_type = VideoCodecType::kVideoCodecAV1;
std::vector<VideoStream> streams = {DefaultStream()};
streams[0].scalability_mode = ScalabilityMode::kL3T2;
VideoCodec codec =
VideoCodecInitializer::SetupCodec(env_.field_trials(), config, streams);
EXPECT_GE(codec.spatialLayers[0].targetBitrate,
codec.spatialLayers[0].minBitrate);
}
TEST_F(VideoCodecInitializerTest, Av1ConfiguredMinBitrateNotAppliedIfUnset) {
VideoEncoderConfig config;
config.simulcast_layers.resize(1);
config.codec_type = VideoCodecType::kVideoCodecAV1;
std::vector<VideoStream> streams = {DefaultStream()};
streams[0].scalability_mode = ScalabilityMode::kL3T2;
VideoCodec codec =
VideoCodecInitializer::SetupCodec(env_.field_trials(), config, streams);
EXPECT_GT(codec.spatialLayers[0].minBitrate, 0u);
}
TEST_F(VideoCodecInitializerTest, Av1TwoSpatialLayersActiveByDefault) {
VideoEncoderConfig config;
config.codec_type = VideoCodecType::kVideoCodecAV1;
std::vector<VideoStream> streams = {DefaultStream()};
streams[0].scalability_mode = ScalabilityMode::kL2T2;
config.spatial_layers = {};
VideoCodec codec =
VideoCodecInitializer::SetupCodec(env_.field_trials(), config, streams);
EXPECT_TRUE(codec.spatialLayers[0].active);
EXPECT_TRUE(codec.spatialLayers[1].active);
}
TEST_F(VideoCodecInitializerTest, Av1TwoSpatialLayersOneDeactivated) {
VideoEncoderConfig config;
config.codec_type = VideoCodecType::kVideoCodecAV1;
std::vector<VideoStream> streams = {DefaultStream()};
streams[0].scalability_mode = ScalabilityMode::kL2T2;
config.spatial_layers.resize(2);
config.spatial_layers[0].active = true;
config.spatial_layers[1].active = false;
VideoCodec codec =
VideoCodecInitializer::SetupCodec(env_.field_trials(), config, streams);
EXPECT_TRUE(codec.spatialLayers[0].active);
EXPECT_FALSE(codec.spatialLayers[1].active);
}
TEST_F(VideoCodecInitializerTest, Vp9SingleSpatialLayerBitratesAreConsistent) {
VideoEncoderConfig config;
config.simulcast_layers.resize(3);
config.simulcast_layers[0].active = true;
config.simulcast_layers[1].active = false;
config.simulcast_layers[2].active = false;
config.codec_type = VideoCodecType::kVideoCodecVP9;
std::vector<VideoStream> streams = {DefaultStream()};
streams[0].scalability_mode = ScalabilityMode::kL1T2;
VideoCodec codec =
VideoCodecInitializer::SetupCodec(env_.field_trials(), config, streams);
EXPECT_EQ(1u, codec.VP9()->numberOfSpatialLayers);
// Target is consistent with min and max (min <= target <= max).
EXPECT_GE(codec.spatialLayers[0].targetBitrate,
codec.spatialLayers[0].minBitrate);
EXPECT_LE(codec.spatialLayers[0].targetBitrate,
codec.spatialLayers[0].maxBitrate);
// In the single spatial layer case, the spatial layer bitrates are copied
// from the codec's bitrate which is the sum if VideoStream bitrates. In this
// case we only have a single VideoStream using default values.
EXPECT_EQ(codec.spatialLayers[0].minBitrate, kDefaultMinBitrateBps / 1000);
EXPECT_EQ(codec.spatialLayers[0].targetBitrate, kDefaultMaxBitrateBps / 1000);
EXPECT_EQ(codec.spatialLayers[0].maxBitrate, kDefaultMaxBitrateBps / 1000);
}
TEST_F(VideoCodecInitializerTest, Vp9TwoSpatialLayersBitratesAreConsistent) {
VideoEncoderConfig config;
config.simulcast_layers.resize(3);
config.simulcast_layers[0].active = true;
config.simulcast_layers[1].active = false;
config.simulcast_layers[2].active = false;
config.codec_type = VideoCodecType::kVideoCodecVP9;
std::vector<VideoStream> streams = {DefaultStream()};
streams[0].scalability_mode = ScalabilityMode::kL2T2;
VideoCodec codec =
VideoCodecInitializer::SetupCodec(env_.field_trials(), config, streams);
EXPECT_EQ(2u, codec.VP9()->numberOfSpatialLayers);
EXPECT_GE(codec.spatialLayers[0].targetBitrate,
codec.spatialLayers[0].minBitrate);
EXPECT_LE(codec.spatialLayers[0].targetBitrate,
codec.spatialLayers[0].maxBitrate);
EXPECT_LT(codec.spatialLayers[0].minBitrate, kDefaultMinBitrateBps / 1000);
EXPECT_GE(codec.spatialLayers[1].targetBitrate,
codec.spatialLayers[1].minBitrate);
EXPECT_LE(codec.spatialLayers[1].targetBitrate,
codec.spatialLayers[1].maxBitrate);
EXPECT_GT(codec.spatialLayers[1].minBitrate,
codec.spatialLayers[0].maxBitrate);
}
TEST_F(VideoCodecInitializerTest, UpdatesVp9SpecificFieldsWithScalabilityMode) {
VideoEncoderConfig config;
config.codec_type = VideoCodecType::kVideoCodecVP9;
std::vector<VideoStream> streams = {DefaultStream()};
streams[0].scalability_mode = ScalabilityMode::kL2T3_KEY;
VideoCodec codec =
VideoCodecInitializer::SetupCodec(env_.field_trials(), config, streams);
EXPECT_EQ(codec.VP9()->numberOfSpatialLayers, 2u);
EXPECT_EQ(codec.VP9()->numberOfTemporalLayers, 3u);
EXPECT_EQ(codec.VP9()->interLayerPred, InterLayerPredMode::kOnKeyPic);
streams[0].scalability_mode = ScalabilityMode::kS3T1;
codec =
VideoCodecInitializer::SetupCodec(env_.field_trials(), config, streams);
EXPECT_EQ(codec.VP9()->numberOfSpatialLayers, 3u);
EXPECT_EQ(codec.VP9()->numberOfTemporalLayers, 1u);
EXPECT_EQ(codec.VP9()->interLayerPred, InterLayerPredMode::kOff);
}
} // namespace webrtc