chromium/third_party/webrtc/modules/audio_processing/agc2/biquad_filter.h

/*
 *  Copyright (c) 2016 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 MODULES_AUDIO_PROCESSING_AGC2_BIQUAD_FILTER_H_
#define MODULES_AUDIO_PROCESSING_AGC2_BIQUAD_FILTER_H_

#include "api/array_view.h"

namespace webrtc {

// Transposed direct form I implementation of a bi-quad filter.
//        b[0] + b[1] • z^(-1) + b[2] • z^(-2)
// H(z) = ------------------------------------
//          1 + a[1] • z^(-1) + a[2] • z^(-2)
class BiQuadFilter {};

}  // namespace webrtc

#endif  // MODULES_AUDIO_PROCESSING_AGC2_BIQUAD_FILTER_H_