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VP9 screenshare: Don't base layers frame-rate on input frame-rate

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If input framerate is a little unstable, using it to cap layers will
make output framerate even smaller for longer periods of time.

Also, fix screenshare_loopback test for low-fps vp9 testing.

Bug: webrtc:10257
Change-Id: I64aa087e859ab4ab8e484c9ab7f5ac0fb18bd37d
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/138204
Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org>
Reviewed-by: Sergey Silkin <ssilkin@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#28050}
This commit is contained in:
Ilya Nikolaevskiy
2019-05-24 10:03:27 +02:00
committed by Commit Bot
parent f3db34d060
commit eb1754c575
4 changed files with 19 additions and 63 deletions
Download Patch File Download Diff File Expand all files Collapse all files

41
modules/video_coding/codecs/vp9/test/vp9_impl_unittest.cc
View File

@ -1288,47 +1288,6 @@ TEST_F(TestVp9ImplFrameDropping, DifferentFrameratePerSpatialLayer) {
}
}
TEST_F(TestVp9ImplFrameDropping, LayerMaxFramerateIsCappedByCodecMaxFramerate) {
const float input_framerate_fps = 30.0;
const float layer_max_framerate_fps = 30.0;
const uint32_t codec_max_framerate_fps = layer_max_framerate_fps / 3;
const size_t video_duration_secs = 3;
const size_t num_input_frames = video_duration_secs * input_framerate_fps;
VideoBitrateAllocation bitrate_allocation;
codec_settings_.spatialLayers[0].width = codec_settings_.width;
codec_settings_.spatialLayers[0].height = codec_settings_.height;
codec_settings_.spatialLayers[0].maxFramerate = layer_max_framerate_fps;
codec_settings_.spatialLayers[0].minBitrate = codec_settings_.startBitrate;
codec_settings_.spatialLayers[0].maxBitrate = codec_settings_.startBitrate;
codec_settings_.spatialLayers[0].targetBitrate = codec_settings_.startBitrate;
codec_settings_.spatialLayers[0].active = true;
bitrate_allocation.SetBitrate(
0, 0, codec_settings_.spatialLayers[0].targetBitrate * 1000);
EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK,
encoder_->InitEncode(&codec_settings_, 1 /* number of cores */,
0 /* max payload size (unused) */));
encoder_->SetRates(VideoEncoder::RateControlParameters(
bitrate_allocation, codec_max_framerate_fps));
VideoFrame* input_frame = NextInputFrame();
for (size_t frame_num = 0; frame_num < num_input_frames; ++frame_num) {
EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK, encoder_->Encode(*input_frame, nullptr));
const size_t timestamp = input_frame->timestamp() +
kVideoPayloadTypeFrequency / input_framerate_fps;
input_frame->set_timestamp(static_cast<uint32_t>(timestamp));
}
const size_t num_encoded_frames = GetNumEncodedFrames();
const float encoded_framerate_fps = num_encoded_frames / video_duration_secs;
const float max_framerate_error_fps = codec_max_framerate_fps * 0.1f;
EXPECT_NEAR(encoded_framerate_fps, codec_max_framerate_fps,
max_framerate_error_fps);
}
class TestVp9ImplProfile2 : public TestVp9Impl {
protected:
void SetUp() override {

38
modules/video_coding/codecs/vp9/vp9_impl.cc
View File

@ -316,8 +316,7 @@ bool VP9EncoderImpl::SetSvcRates(
}
framerate_controller_[sl_idx].SetTargetRate(
std::min(static_cast<float>(codec_.maxFramerate),
codec_.spatialLayers[sl_idx].maxFramerate));
codec_.spatialLayers[sl_idx].maxFramerate);
}
} else {
float rate_ratio[VPX_MAX_LAYERS] = {0};
@ -535,24 +534,17 @@ int VP9EncoderImpl::InitEncode(const VideoCodec* inst,
inter_layer_pred_ = inst->VP9().interLayerPred;
different_framerates_used_ = false;
for (size_t sl_idx = 1; sl_idx < num_spatial_layers_; ++sl_idx) {
if (std::abs(codec_.spatialLayers[sl_idx].maxFramerate -
codec_.spatialLayers[0].maxFramerate) > 1e-9) {
different_framerates_used_ = true;
}
}
if (different_framerates_used_ && !is_flexible_mode_) {
RTC_LOG(LS_ERROR) << "Flexible mode required for different framerates on "
"different spatial layers";
if (num_spatial_layers_ > 1 &&
codec_.mode == VideoCodecMode::kScreensharing && !is_flexible_mode_) {
RTC_LOG(LS_ERROR) << "Flexible mode is required for screenshare with "
"several spatial layers";
return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
}
// External reference control is required for different frame rate on spatial
// layers because libvpx generates rtp incompatible references in this case.
external_ref_control_ = field_trial::IsEnabled("WebRTC-Vp9ExternalRefCtrl") ||
different_framerates_used_ ||
is_flexible_mode_ ||
inter_layer_pred_ == InterLayerPredMode::kOn;
if (num_temporal_layers_ == 1) {
@ -589,7 +581,8 @@ int VP9EncoderImpl::InitEncode(const VideoCodec* inst,
if (external_ref_control_) {
config_->temporal_layering_mode = VP9E_TEMPORAL_LAYERING_MODE_BYPASS;
if (num_temporal_layers_ > 1 && different_framerates_used_) {
if (num_temporal_layers_ > 1 && num_spatial_layers_ > 1 &&
codec_.mode == VideoCodecMode::kScreensharing) {
// External reference control for several temporal layers with different
// frame rates on spatial layers is not implemented yet.
return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
@ -966,7 +959,8 @@ int VP9EncoderImpl::Encode(const VideoFrame& input_image,
if (VideoCodecMode::kScreensharing == codec_.mode) {
for (uint8_t sl_idx = 0; sl_idx < num_active_spatial_layers_; ++sl_idx) {
ref_config.duration[sl_idx] = static_cast<int64_t>(
90000 / framerate_controller_[sl_idx].GetTargetRate());
90000 / (std::min(static_cast<float>(codec_.maxFramerate),
framerate_controller_[sl_idx].GetTargetRate())));
}
}
@ -985,8 +979,9 @@ int VP9EncoderImpl::Encode(const VideoFrame& input_image,
RTC_DCHECK_GE(framerate_controller_.size(), num_active_spatial_layers_);
float target_framerate_fps =
(codec_.mode == VideoCodecMode::kScreensharing)
? framerate_controller_[num_active_spatial_layers_ - 1]
.GetTargetRate()
? std::min(static_cast<float>(codec_.maxFramerate),
framerate_controller_[num_active_spatial_layers_ - 1]
.GetTargetRate())
: codec_.maxFramerate;
uint32_t duration = static_cast<uint32_t>(90000 / target_framerate_fps);
const vpx_codec_err_t rv = vpx_codec_encode(encoder_, raw_, timestamp_,
@ -1201,6 +1196,8 @@ void VP9EncoderImpl::FillReferenceIndices(const vpx_codec_cx_pkt& pkt,
// It is safe to ignore this requirement if inter-layer prediction is
// enabled for all frames when all base frames are relayed to receiver.
RTC_DCHECK_EQ(ref_buf.spatial_layer_id, layer_id.spatial_layer_id);
} else {
RTC_DCHECK_LE(ref_buf.spatial_layer_id, layer_id.spatial_layer_id);
}
RTC_DCHECK_LE(ref_buf.temporal_layer_id, layer_id.temporal_layer_id);
@ -1320,7 +1317,7 @@ vpx_svc_ref_frame_config_t VP9EncoderImpl::SetReferences(
const bool same_spatial_layer =
ref_buf_[buf_idx].spatial_layer_id == sl_idx;
bool correct_pid = false;
if (different_framerates_used_) {
if (is_flexible_mode_) {
correct_pid = pid_diff < kMaxAllowedPidDIff;
} else {
// Below code assumes single temporal referecence.
@ -1519,7 +1516,8 @@ size_t VP9EncoderImpl::SteadyStateSize(int sid, int tid) {
const size_t bitrate_bps = current_bitrate_allocation_.GetBitrate(
sid, tid == kNoTemporalIdx ? 0 : tid);
const float fps = (codec_.mode == VideoCodecMode::kScreensharing)
? framerate_controller_[sid].GetTargetRate()
? std::min(static_cast<float>(codec_.maxFramerate),
framerate_controller_[sid].GetTargetRate())
: codec_.maxFramerate;
return static_cast<size_t>(
bitrate_bps / (8 * fps) *

1
modules/video_coding/codecs/vp9/vp9_impl.h
View File

@ -113,7 +113,6 @@ class VP9EncoderImpl : public VP9Encoder {
GofInfoVP9 gof_; // Contains each frame's temporal information for
// non-flexible mode.
bool force_key_frame_;
bool different_framerates_used_;
size_t pics_since_key_;
uint8_t num_temporal_layers_;
uint8_t num_spatial_layers_; // Number of configured SLs

2
video/video_quality_test.cc
View File

@ -843,7 +843,7 @@ void VideoQualityTest::SetupVideo(Transport* send_transport,
params_.ss[video_idx].num_spatial_layers);
vp9_settings.interLayerPred = params_.ss[video_idx].inter_layer_pred;
// High FPS vp9 screenshare requires flexible mode.
if (params_.video[video_idx].fps > 5) {
if (params_.ss[video_idx].num_spatial_layers > 1) {
vp9_settings.flexibleMode = true;
}
video_encoder_configs_[video_idx].encoder_specific_settings =