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Side by Side Diff: webrtc/modules/audio_processing/level_controller/down_sampler.h

Issue 2090583002: New module for the adaptive level controlling functionality in the audio processing module (Closed) Base URL: https://chromium.googlesource.com/external/webrtc.git@master
Patch Set: Changes in response to reviewer comments Created 4 years, 5 months ago
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1 /*
2 * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11 #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_LEVEL_CONTROLLER_DOWN_SAMPLER_H_
12 #define WEBRTC_MODULES_AUDIO_PROCESSING_LEVEL_CONTROLLER_DOWN_SAMPLER_H_
13
14 #include "webrtc/base/array_view.h"
15 #include "webrtc/base/constructormagic.h"
16 #include "webrtc/modules/audio_processing/level_controller/biquad_filter.h"
17
18 namespace webrtc {
19
20 class ApmDataDumper;
21
22 class DownSampler {
23 public:
24 explicit DownSampler(ApmDataDumper* data_dumper);
25 void Initialize(int sample_rate_hz);
26
27 void DownSample(rtc::ArrayView<const float> in, rtc::ArrayView<float> out);
28
29 private:
30 ApmDataDumper* data_dumper_;
31 int sample_rate_hz_;
32 int down_sampling_factor_;
33 BiQuadFilter low_pass_filter_;
34
35 RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(DownSampler);
36 };
37
38 } // namespace webrtc
39
40 #endif // WEBRTC_MODULES_AUDIO_PROCESSING_LEVEL_CONTROLLER_DOWN_SAMPLER_H_
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