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Allowing reduced computations in the noise suppressor when the output is not used

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This CL adds functionality in the noise suppressor that allows the
computational complexity to be reduced when the output of APM is not used.

Bug: b/177830919
Change-Id: I849351ba9559fae770e4667d78e38abde5230eed
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/211342
Reviewed-by: Gustaf Ullberg <gustaf@webrtc.org>
Commit-Queue: Per Åhgren <peah@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#33477}
This commit is contained in:
Per Åhgren 2021-03-12 14:12:44 +00:00 committed by Commit Bot
parent 8ee1ec82e4
commit 15179a9986
3 changed files with 19 additions and 0 deletions
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4
modules/audio_processing/audio_processing_impl.cc
View file

@ -679,6 +679,10 @@ void AudioProcessingImpl::HandleCaptureOutputUsedSetting(
submodules_.echo_controller->SetCaptureOutputUsage(
capture_.capture_output_used);
}
if (submodules_.noise_suppressor) {
submodules_.noise_suppressor->SetCaptureOutputUsage(
capture_.capture_output_used);
}
}
void AudioProcessingImpl::SetRuntimeSetting(RuntimeSetting setting) {

6
modules/audio_processing/ns/noise_suppressor.cc
View file

@ -448,6 +448,12 @@ void NoiseSuppressor::Process(AudioBuffer* audio) {
}
}
// Only do the below processing if the output of the audio processing module
// is used.
if (!capture_output_used_) {
return;
}
// Aggregate the Wiener filters for all channels.
std::array<float, kFftSizeBy2Plus1> filter_data;
rtc::ArrayView<const float, kFftSizeBy2Plus1> filter = filter_data;

9
modules/audio_processing/ns/noise_suppressor.h
View file

@ -41,12 +41,21 @@ class NoiseSuppressor {
// Applies noise suppression.
void Process(AudioBuffer* audio);
// Specifies whether the capture output will be used. The purpose of this is
// to allow the noise suppressor to deactivate some of the processing when the
// resulting output is anyway not used, for instance when the endpoint is
// muted.
void SetCaptureOutputUsage(bool capture_output_used) {
capture_output_used_ = capture_output_used;
}
private:
const size_t num_bands_;
const size_t num_channels_;
const SuppressionParams suppression_params_;
int32_t num_analyzed_frames_ = -1;
NrFft fft_;
bool capture_output_used_ = true;
struct ChannelState {
ChannelState(const SuppressionParams& suppression_params, size_t num_bands);