Finalization of the first version of EchoCanceller 3

webrtc/modules/audio_processing/aec3/suppression_filter.h

+/*
+ *  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.
+ */
+
+#ifndef WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_SUPPRESSION_FILTER_H_
+#define WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_SUPPRESSION_FILTER_H_
+
+#include <array>
+#include <vector>
+
+#include "webrtc/base/constructormagic.h"
+#include "webrtc/modules/audio_processing/aec3/aec3_common.h"
+#include "webrtc/modules/audio_processing/aec3/aec3_fft.h"
+
+namespace webrtc {
+
+class SuppressionFilter {
+ public:
+  explicit SuppressionFilter(int sample_rate_hz);
+  ~SuppressionFilter();
+  void ApplyGain(const FftData& comfort_noise,
+                 const FftData& comfort_noise_high_bands,
+                 const std::array<float, kFftLengthBy2Plus1>& suppression_gain,
+                 std::vector<std::vector<float>>* e);
+
+ private:
+  const int sample_rate_hz_;
+  const OouraFft ooura_fft_;
+  const Aec3Fft fft_;
+  std::array<float, kFftLengthBy2> e_input_old_;
+  std::vector<std::array<float, kFftLengthBy2>> e_output_old_;
+  RTC_DISALLOW_COPY_AND_ASSIGN(SuppressionFilter);
+};
+
+}  // namespace webrtc
+
+#endif  // WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_SUPPRESSION_FILTER_H_