2019-06-04 10:14:50 +00:00
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/*
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* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef MODULES_AUDIO_PROCESSING_AGC2_DOWN_SAMPLER_H_
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#define MODULES_AUDIO_PROCESSING_AGC2_DOWN_SAMPLER_H_
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#include "api/array_view.h"
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#include "modules/audio_processing/agc2/biquad_filter.h"
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2020-08-14 16:58:22 +00:00
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#include "rtc_base/constructor_magic.h"
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2019-06-04 10:14:50 +00:00
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namespace webrtc {
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class ApmDataDumper;
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class DownSampler {
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public:
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explicit DownSampler(ApmDataDumper* data_dumper);
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void Initialize(int sample_rate_hz);
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void DownSample(rtc::ArrayView<const float> in, rtc::ArrayView<float> out);
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private:
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ApmDataDumper* data_dumper_;
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int sample_rate_hz_;
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int down_sampling_factor_;
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BiQuadFilter low_pass_filter_;
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RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(DownSampler);
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_AGC2_DOWN_SAMPLER_H_
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