Introduced the new parameter setting scheme for activating the high-pass filter in APM

webrtc/modules/audio_processing/audio_processing_impl.cc

 /*
  *  Copyright (c) 2012 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 "webrtc/modules/audio_processing/audio_processing_impl.h"
 
 #include <algorithm>
 
 #include "webrtc/base/checks.h"
 #include "webrtc/base/platform_file.h"
 #include "webrtc/base/trace_event.h"
 #include "webrtc/common_audio/audio_converter.h"
 #include "webrtc/common_audio/channel_buffer.h"
 #include "webrtc/common_audio/include/audio_util.h"
 #include "webrtc/common_audio/signal_processing/include/signal_processing_library.h"
 #include "webrtc/modules/audio_processing/aec/aec_core.h"
 #include "webrtc/modules/audio_processing/agc/agc_manager_direct.h"
 #include "webrtc/modules/audio_processing/audio_buffer.h"
 #include "webrtc/modules/audio_processing/beamformer/nonlinear_beamformer.h"
+#include "webrtc/modules/audio_processing/biquad_high_pass_filter.h"
 #include "webrtc/modules/audio_processing/common.h"
 #include "webrtc/modules/audio_processing/echo_cancellation_impl.h"
 #include "webrtc/modules/audio_processing/echo_control_mobile_impl.h"
 #include "webrtc/modules/audio_processing/gain_control_for_experimental_agc.h"
 #include "webrtc/modules/audio_processing/gain_control_impl.h"
-#include "webrtc/modules/audio_processing/high_pass_filter_impl.h"
 #if WEBRTC_INTELLIGIBILITY_ENHANCER
 #include "webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer.h"
 #endif
 #include "webrtc/modules/audio_processing/level_controller/level_controller.h"
 #include "webrtc/modules/audio_processing/level_estimator_impl.h"
 #include "webrtc/modules/audio_processing/noise_suppression_impl.h"
 #include "webrtc/modules/audio_processing/transient/transient_suppressor.h"
 #include "webrtc/modules/audio_processing/voice_detection_impl.h"
 #include "webrtc/modules/include/module_common_types.h"
 #include "webrtc/system_wrappers/include/file_wrapper.h"
@@ skipping 169 matching lines @@
   return false;
 #endif
 }
 
 struct AudioProcessingImpl::ApmPublicSubmodules {
   ApmPublicSubmodules() {}
   // Accessed externally of APM without any lock acquired.
   std::unique_ptr<EchoCancellationImpl> echo_cancellation;
   std::unique_ptr<EchoControlMobileImpl> echo_control_mobile;
   std::unique_ptr<GainControlImpl> gain_control;
-  std::unique_ptr<HighPassFilterImpl> high_pass_filter;
   std::unique_ptr<LevelEstimatorImpl> level_estimator;
   std::unique_ptr<NoiseSuppressionImpl> noise_suppression;
   std::unique_ptr<VoiceDetectionImpl> voice_detection;
   std::unique_ptr<GainControlForExperimentalAgc>
       gain_control_for_experimental_agc;
 
   // Accessed internally from both render and capture.
   std::unique_ptr<TransientSuppressor> transient_suppressor;
 #if WEBRTC_INTELLIGIBILITY_ENHANCER
   std::unique_ptr<IntelligibilityEnhancer> intelligibility_enhancer;
 #endif
 };
 
 struct AudioProcessingImpl::ApmPrivateSubmodules {
   explicit ApmPrivateSubmodules(NonlinearBeamformer* beamformer)
       : beamformer(beamformer) {}
   // Accessed internally from capture or during initialization
   std::unique_ptr<NonlinearBeamformer> beamformer;
   std::unique_ptr<AgcManagerDirect> agc_manager;
+  std::unique_ptr<BiquadHighPassFilter> high_pass_filter;
   std::unique_ptr<LevelController> level_controller;
 };
 
 AudioProcessing* AudioProcessing::Create() {
   webrtc::Config config;
   return Create(config, nullptr);
 }
 
 AudioProcessing* AudioProcessing::Create(const webrtc::Config& config) {
   return Create(config, nullptr);
 }
 
 AudioProcessing* AudioProcessing::Create(const webrtc::Config& config,
                                          NonlinearBeamformer* beamformer) {
   AudioProcessingImpl* apm = new AudioProcessingImpl(config, beamformer);
   if (apm->Initialize() != kNoError) {
     delete apm;
     apm = nullptr;
   }
 
   return apm;
 }
 
 AudioProcessingImpl::AudioProcessingImpl(const webrtc::Config& config)
     : AudioProcessingImpl(config, nullptr) {}
 
 AudioProcessingImpl::AudioProcessingImpl(const webrtc::Config& config,
                                          NonlinearBeamformer* beamformer)
-    : public_submodules_(new ApmPublicSubmodules()),
+    : high_pass_filter_impl_(new HighPassFilterImpl(this)),
+      public_submodules_(new ApmPublicSubmodules()),
       private_submodules_(new ApmPrivateSubmodules(beamformer)),
       constants_(config.Get<ExperimentalAgc>().startup_min_volume,
 #if defined(WEBRTC_ANDROID) || defined(WEBRTC_IOS)
                  false),
 #else
                  config.Get<ExperimentalAgc>().enabled),
 #endif
 #if defined(WEBRTC_ANDROID) || defined(WEBRTC_IOS)
       capture_(false,
 #else
       capture_(config.Get<ExperimentalNs>().enabled,
 #endif
                config.Get<Beamforming>().array_geometry,
                config.Get<Beamforming>().target_direction),
       capture_nonlocked_(config.Get<Beamforming>().enabled,
                          config.Get<Intelligibility>().enabled) {
   {
     rtc::CritScope cs_render(&crit_render_);
     rtc::CritScope cs_capture(&crit_capture_);
 
     public_submodules_->echo_cancellation.reset(
         new EchoCancellationImpl(&crit_render_, &crit_capture_));
     public_submodules_->echo_control_mobile.reset(
         new EchoControlMobileImpl(&crit_render_, &crit_capture_));
     public_submodules_->gain_control.reset(
         new GainControlImpl(&crit_capture_, &crit_capture_));
-    public_submodules_->high_pass_filter.reset(
-        new HighPassFilterImpl(&crit_capture_));
     public_submodules_->level_estimator.reset(
         new LevelEstimatorImpl(&crit_capture_));
     public_submodules_->noise_suppression.reset(
         new NoiseSuppressionImpl(&crit_capture_));
     public_submodules_->voice_detection.reset(
         new VoiceDetectionImpl(&crit_capture_));
     public_submodules_->gain_control_for_experimental_agc.reset(
         new GainControlForExperimentalAgc(
             public_submodules_->gain_control.get(), &crit_capture_));
 
@@ skipping 147 matching lines @@
     }
     private_submodules_->agc_manager->Initialize();
     private_submodules_->agc_manager->SetCaptureMuted(
         capture_.output_will_be_muted);
   }
   InitializeTransient();
   InitializeBeamformer();
 #if WEBRTC_INTELLIGIBILITY_ENHANCER
   InitializeIntelligibility();
 #endif
-  public_submodules_->high_pass_filter->Initialize(num_proc_channels(),
-                                                   proc_sample_rate_hz());
+  InitializeHighPassFilter();
   public_submodules_->noise_suppression->Initialize(num_proc_channels(),
                                                     proc_sample_rate_hz());
   public_submodules_->voice_detection->Initialize(proc_split_sample_rate_hz());
   public_submodules_->level_estimator->Initialize();
   InitializeLevelController();
 
 #ifdef WEBRTC_AUDIOPROC_DEBUG_DUMP
   if (debug_dump_.debug_file->is_open()) {
     int err = WriteInitMessage();
     if (err != kNoError) {
@@ skipping 101 matching lines @@
     capture_nonlocked_.level_controller_enabled =
         config_.level_controller.enabled;
     // TODO(peah): Remove the conditional initialization to always initialize
     // the level controller regardless of whether it is enabled or not.
     InitializeLevelController();
   }
   LOG(LS_INFO) << "Level controller activated: "
                << capture_nonlocked_.level_controller_enabled;
 
   private_submodules_->level_controller->ApplyConfig(config_.level_controller);
+
+  InitializeHighPassFilter();
+
+  LOG(LS_INFO) << "Highpass filter activated: "
+               << config_.high_pass_filter.enabled;
 }
 
 void AudioProcessingImpl::SetExtraOptions(const webrtc::Config& config) {
   // Run in a single-threaded manner when setting the extra options.
   rtc::CritScope cs_render(&crit_render_);
   rtc::CritScope cs_capture(&crit_capture_);
 
   public_submodules_->echo_cancellation->SetExtraOptions(config);
 
   if (capture_.transient_suppressor_enabled !=
@@ skipping 428 matching lines @@
     capture_buffer->SplitIntoFrequencyBands();
   }
 
   if (capture_nonlocked_.beamformer_enabled) {
     private_submodules_->beamformer->AnalyzeChunk(
         *capture_buffer->split_data_f());
     // Discards all channels by the leftmost one.
     capture_buffer->set_num_channels(1);
   }
 
-  public_submodules_->high_pass_filter->ProcessCaptureAudio(capture_buffer);
+  if (private_submodules_->high_pass_filter) {
+    private_submodules_->high_pass_filter->Process(capture_buffer);
+  }
   RETURN_ON_ERR(
       public_submodules_->gain_control->AnalyzeCaptureAudio(capture_buffer));
   public_submodules_->noise_suppression->AnalyzeCaptureAudio(capture_buffer);
 
   // Ensure that the stream delay was set before the call to the
   // AEC ProcessCaptureAudio function.
   if (public_submodules_->echo_cancellation->is_enabled() &&
       !was_stream_delay_set()) {
     return AudioProcessing::kStreamParameterNotSetError;
   }
@@ skipping 379 matching lines @@
 }
 
 GainControl* AudioProcessingImpl::gain_control() const {
   if (constants_.use_experimental_agc) {
     return public_submodules_->gain_control_for_experimental_agc.get();
   }
   return public_submodules_->gain_control.get();
 }
 
 HighPassFilter* AudioProcessingImpl::high_pass_filter() const {
-  return public_submodules_->high_pass_filter.get();
+  return high_pass_filter_impl_.get();
 }
 
 LevelEstimator* AudioProcessingImpl::level_estimator() const {
   return public_submodules_->level_estimator.get();
 }
 
 NoiseSuppression* AudioProcessingImpl::noise_suppression() const {
   return public_submodules_->noise_suppression.get();
 }
 
 VoiceDetection* AudioProcessingImpl::voice_detection() const {
   return public_submodules_->voice_detection.get();
 }
 
 bool AudioProcessingImpl::UpdateActiveSubmoduleStates() {
   return submodule_states_.Update(
-      public_submodules_->high_pass_filter->is_enabled(),
+      config_.high_pass_filter.enabled,
       public_submodules_->echo_cancellation->is_enabled(),
       public_submodules_->echo_control_mobile->is_enabled(),
       public_submodules_->noise_suppression->is_enabled(),
       capture_nonlocked_.intelligibility_enabled,
       capture_nonlocked_.beamformer_enabled,
       public_submodules_->gain_control->is_enabled(),
       capture_nonlocked_.level_controller_enabled,
       public_submodules_->voice_detection->is_enabled(),
       public_submodules_->level_estimator->is_enabled(),
       capture_.transient_suppressor_enabled);
@@ skipping 27 matching lines @@
   if (capture_nonlocked_.intelligibility_enabled) {
     public_submodules_->intelligibility_enhancer.reset(
         new IntelligibilityEnhancer(capture_nonlocked_.split_rate,
                                     render_.render_audio->num_channels(),
                                     render_.render_audio->num_bands(),
                                     NoiseSuppressionImpl::num_noise_bins()));
   }
 #endif
 }
 
+void AudioProcessingImpl::InitializeHighPassFilter() {
+  if (config_.high_pass_filter.enabled) {
+    private_submodules_->high_pass_filter.reset(
+        new BiquadHighPassFilter(num_proc_channels(), proc_sample_rate_hz()));
+  } else {
+    private_submodules_->high_pass_filter.reset();
+  }
+}
+
 void AudioProcessingImpl::InitializeLevelController() {
   private_submodules_->level_controller->Initialize(proc_sample_rate_hz());
 }
 
 void AudioProcessingImpl::MaybeUpdateHistograms() {
   static const int kMinDiffDelayMs = 60;
 
   if (echo_cancellation()->is_enabled()) {
     // Activate delay_jumps_ counters if we know echo_cancellation is runnning.
     // If a stream has echo we know that the echo_cancellation is in process.
@@ skipping 159 matching lines @@
   config.set_aecm_routing_mode(static_cast<int>(
       public_submodules_->echo_control_mobile->routing_mode()));
 
   config.set_agc_enabled(public_submodules_->gain_control->is_enabled());
   config.set_agc_mode(
       static_cast<int>(public_submodules_->gain_control->mode()));
   config.set_agc_limiter_enabled(
       public_submodules_->gain_control->is_limiter_enabled());
   config.set_noise_robust_agc_enabled(constants_.use_experimental_agc);
 
-  config.set_hpf_enabled(public_submodules_->high_pass_filter->is_enabled());
+  config.set_hpf_enabled(config_.high_pass_filter.enabled);
 
   config.set_ns_enabled(public_submodules_->noise_suppression->is_enabled());
   config.set_ns_level(
       static_cast<int>(public_submodules_->noise_suppression->level()));
 
   config.set_transient_suppression_enabled(
       capture_.transient_suppressor_enabled);
   config.set_intelligibility_enhancer_enabled(
       capture_nonlocked_.intelligibility_enabled);
 
@@ skipping 42 matching lines @@
       capture_processing_format(kSampleRate16kHz),
       split_rate(kSampleRate16kHz) {}
 
 AudioProcessingImpl::ApmCaptureState::~ApmCaptureState() = default;
 
 AudioProcessingImpl::ApmRenderState::ApmRenderState() = default;
 
 AudioProcessingImpl::ApmRenderState::~ApmRenderState() = default;
 
 }  // namespace webrtc