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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_AEC3_CASCADED_BIQUAD_FILTER_H_ | 11 #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_CASCADED_BIQUAD_FILTER_H_ |
12 #define WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_CASCADED_BIQUAD_FILTER_H_ | 12 #define WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_CASCADED_BIQUAD_FILTER_H_ |
13 | 13 |
14 #include <vector> | 14 #include <vector> |
15 | 15 |
16 #include "webrtc/rtc_base/array_view.h" | 16 #include "webrtc/base/array_view.h" |
17 #include "webrtc/rtc_base/constructormagic.h" | 17 #include "webrtc/base/constructormagic.h" |
18 | 18 |
19 namespace webrtc { | 19 namespace webrtc { |
20 | 20 |
21 // Applies a number of identical biquads in a cascaded manner. The filter | 21 // Applies a number of identical biquads in a cascaded manner. The filter |
22 // implementation is direct form 1. | 22 // implementation is direct form 1. |
23 class CascadedBiQuadFilter { | 23 class CascadedBiQuadFilter { |
24 public: | 24 public: |
25 struct BiQuadState { | 25 struct BiQuadState { |
26 BiQuadState() : x(), y() {} | 26 BiQuadState() : x(), y() {} |
27 float x[2]; | 27 float x[2]; |
(...skipping 21 matching lines...) Expand all Loading... |
49 | 49 |
50 std::vector<BiQuadState> biquad_states_; | 50 std::vector<BiQuadState> biquad_states_; |
51 const BiQuadCoefficients coefficients_; | 51 const BiQuadCoefficients coefficients_; |
52 | 52 |
53 RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(CascadedBiQuadFilter); | 53 RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(CascadedBiQuadFilter); |
54 }; | 54 }; |
55 | 55 |
56 } // namespace webrtc | 56 } // namespace webrtc |
57 | 57 |
58 #endif // WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_CASCADED_BIQUAD_FILTER_H_ | 58 #endif // WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_CASCADED_BIQUAD_FILTER_H_ |
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