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1 /* | 1 /* |
2 * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 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 | 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 | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
11 #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_LEVEL_CONTROLLER_DOWN_SAMPLER_H_ | 11 #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_LEVEL_CONTROLLER_DOWN_SAMPLER_H_ |
12 #define WEBRTC_MODULES_AUDIO_PROCESSING_LEVEL_CONTROLLER_DOWN_SAMPLER_H_ | 12 #define WEBRTC_MODULES_AUDIO_PROCESSING_LEVEL_CONTROLLER_DOWN_SAMPLER_H_ |
13 | 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" | 14 #include "webrtc/modules/audio_processing/level_controller/biquad_filter.h" |
| 15 #include "webrtc/rtc_base/array_view.h" |
| 16 #include "webrtc/rtc_base/constructormagic.h" |
17 | 17 |
18 namespace webrtc { | 18 namespace webrtc { |
19 | 19 |
20 class ApmDataDumper; | 20 class ApmDataDumper; |
21 | 21 |
22 class DownSampler { | 22 class DownSampler { |
23 public: | 23 public: |
24 explicit DownSampler(ApmDataDumper* data_dumper); | 24 explicit DownSampler(ApmDataDumper* data_dumper); |
25 void Initialize(int sample_rate_hz); | 25 void Initialize(int sample_rate_hz); |
26 | 26 |
27 void DownSample(rtc::ArrayView<const float> in, rtc::ArrayView<float> out); | 27 void DownSample(rtc::ArrayView<const float> in, rtc::ArrayView<float> out); |
28 | 28 |
29 private: | 29 private: |
30 ApmDataDumper* data_dumper_; | 30 ApmDataDumper* data_dumper_; |
31 int sample_rate_hz_; | 31 int sample_rate_hz_; |
32 int down_sampling_factor_; | 32 int down_sampling_factor_; |
33 BiQuadFilter low_pass_filter_; | 33 BiQuadFilter low_pass_filter_; |
34 | 34 |
35 RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(DownSampler); | 35 RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(DownSampler); |
36 }; | 36 }; |
37 | 37 |
38 } // namespace webrtc | 38 } // namespace webrtc |
39 | 39 |
40 #endif // WEBRTC_MODULES_AUDIO_PROCESSING_LEVEL_CONTROLLER_DOWN_SAMPLER_H_ | 40 #endif // WEBRTC_MODULES_AUDIO_PROCESSING_LEVEL_CONTROLLER_DOWN_SAMPLER_H_ |
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