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

webrtc/modules/audio_processing/high_pass_filter_impl.h

-/*
- *  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.
- */
-
-#ifndef WEBRTC_MODULES_AUDIO_PROCESSING_HIGH_PASS_FILTER_IMPL_H_
-#define WEBRTC_MODULES_AUDIO_PROCESSING_HIGH_PASS_FILTER_IMPL_H_
-
-#include <memory>
-#include <vector>
-
-#include "webrtc/base/constructormagic.h"
-#include "webrtc/base/criticalsection.h"
-#include "webrtc/modules/audio_processing/include/audio_processing.h"
-
-namespace webrtc {
-
-class AudioBuffer;
-
-class HighPassFilterImpl : public HighPassFilter {
- public:
-  explicit HighPassFilterImpl(rtc::CriticalSection* crit);
-  ~HighPassFilterImpl() override;
-
-  // TODO(peah): Fold into ctor, once public API is removed.
-  void Initialize(size_t channels, int sample_rate_hz);
-  void ProcessCaptureAudio(AudioBuffer* audio);
-
-  // HighPassFilter implementation.
-  int Enable(bool enable) override;
-  bool is_enabled() const override;
-
- private:
-  class BiquadFilter;
-  rtc::CriticalSection* const crit_ = nullptr;
-  bool enabled_ GUARDED_BY(crit_) = false;
-  std::vector<std::unique_ptr<BiquadFilter>> filters_ GUARDED_BY(crit_);
-  RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(HighPassFilterImpl);
-};
-}  // namespace webrtc
-
-#endif  // WEBRTC_MODULES_AUDIO_PROCESSING_HIGH_PASS_FILTER_IMPL_H_