blob: a44f96fa2d07c6c911d61c744c1311d386ccf17f [file] [log] [blame]
* 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.
#include "api/array_view.h"
#include "modules/audio_processing/agc2/biquad_filter.h"
namespace webrtc {
class ApmDataDumper;
class DownSampler {
explicit DownSampler(ApmDataDumper* data_dumper);
DownSampler() = delete;
DownSampler(const DownSampler&) = delete;
DownSampler& operator=(const DownSampler&) = delete;
void Initialize(int sample_rate_hz);
void DownSample(rtc::ArrayView<const float> in, rtc::ArrayView<float> out);
ApmDataDumper* const data_dumper_;
int sample_rate_hz_;
int down_sampling_factor_;
BiQuadFilter low_pass_filter_;
} // namespace webrtc