1 files changed, 86 insertions, 0 deletions
diff --git a/webrtc/modules/audio_processing/aec3/erle_estimator.cc b/webrtc/modules/audio_processing/aec3/erle_estimator.cc
new file mode 100644
index 0000000..4d84345
--- /dev/null
+++ b/webrtc/modules/audio_processing/aec3/erle_estimator.cc
@@ -0,0 +1,86 @@
+/*
+ *  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/audio_processing/aec3/erle_estimator.h"
+
+#include "modules/audio_processing/aec3/aec3_common.h"
+#include "rtc_base/checks.h"
+
+namespace webrtc {
+
+ErleEstimator::ErleEstimator(size_t startup_phase_length_blocks,
+                             const EchoCanceller3Config& config,
+                             size_t num_capture_channels)
+    : startup_phase_length_blocks_(startup_phase_length_blocks),
+      fullband_erle_estimator_(config.erle, num_capture_channels),
+      subband_erle_estimator_(config, num_capture_channels) {
+  if (config.erle.num_sections > 1) {
+    signal_dependent_erle_estimator_ =
+        std::make_unique<SignalDependentErleEstimator>(config,
+                                                       num_capture_channels);
+  }
+  Reset(true);
+}
+
+ErleEstimator::~ErleEstimator() = default;
+
+void ErleEstimator::Reset(bool delay_change) {
+  fullband_erle_estimator_.Reset();
+  subband_erle_estimator_.Reset();
+  if (signal_dependent_erle_estimator_) {
+    signal_dependent_erle_estimator_->Reset();
+  }
+  if (delay_change) {
+    blocks_since_reset_ = 0;
+  }
+}
+
+void ErleEstimator::Update(
+    const RenderBuffer& render_buffer,
+    rtc::ArrayView<const std::vector<std::array<float, kFftLengthBy2Plus1>>>
+        filter_frequency_responses,
+    rtc::ArrayView<const float, kFftLengthBy2Plus1>
+        avg_render_spectrum_with_reverb,
+    rtc::ArrayView<const std::array<float, kFftLengthBy2Plus1>> capture_spectra,
+    rtc::ArrayView<const std::array<float, kFftLengthBy2Plus1>>
+        subtractor_spectra,
+    const std::vector<bool>& converged_filters) {
+  RTC_DCHECK_EQ(subband_erle_estimator_.Erle().size(), capture_spectra.size());
+  RTC_DCHECK_EQ(subband_erle_estimator_.Erle().size(),
+                subtractor_spectra.size());
+  const auto& X2_reverb = avg_render_spectrum_with_reverb;
+  const auto& Y2 = capture_spectra;
+  const auto& E2 = subtractor_spectra;
+
+  if (++blocks_since_reset_ < startup_phase_length_blocks_) {
+    return;
+  }
+
+  subband_erle_estimator_.Update(X2_reverb, Y2, E2, converged_filters);
+
+  if (signal_dependent_erle_estimator_) {
+    signal_dependent_erle_estimator_->Update(
+        render_buffer, filter_frequency_responses, X2_reverb, Y2, E2,
+        subband_erle_estimator_.Erle(), converged_filters);
+  }
+
+  fullband_erle_estimator_.Update(X2_reverb, Y2, E2, converged_filters);
+}
+
+void ErleEstimator::Dump(
+    const std::unique_ptr<ApmDataDumper>& data_dumper) const {
+  fullband_erle_estimator_.Dump(data_dumper);
+  subband_erle_estimator_.Dump(data_dumper);
+  if (signal_dependent_erle_estimator_) {
+    signal_dependent_erle_estimator_->Dump(data_dumper);
+  }
+}
+
+}  // namespace webrtc