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Side by Side Diff: webrtc/modules/audio_processing/three_band_filter_bank.h

Issue 1413333002: system_wrappers: rename interface -> include (Closed) Base URL: https://chromium.googlesource.com/external/webrtc.git@master
Patch Set: Rebased again! Created 5 years, 1 month ago
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1 /* 1 /*
2 * Copyright (c) 2015 The WebRTC project authors. All Rights Reserved. 2 * Copyright (c) 2015 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_THREE_BAND_FILTER_BANK_H_ 11 #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_THREE_BAND_FILTER_BANK_H_
12 #define WEBRTC_MODULES_AUDIO_PROCESSING_THREE_BAND_FILTER_BANK_H_ 12 #define WEBRTC_MODULES_AUDIO_PROCESSING_THREE_BAND_FILTER_BANK_H_
13 13
14 #include <cstring> 14 #include <cstring>
15 #include <vector> 15 #include <vector>
16 16
17 #include "webrtc/common_audio/sparse_fir_filter.h" 17 #include "webrtc/common_audio/sparse_fir_filter.h"
18 #include "webrtc/system_wrappers/interface/scoped_vector.h" 18 #include "webrtc/system_wrappers/include/scoped_vector.h"
19 19
20 namespace webrtc { 20 namespace webrtc {
21 21
22 // An implementation of a 3-band FIR filter-bank with DCT modulation, similar to 22 // An implementation of a 3-band FIR filter-bank with DCT modulation, similar to
23 // the proposed in "Multirate Signal Processing for Communication Systems" by 23 // the proposed in "Multirate Signal Processing for Communication Systems" by
24 // Fredric J Harris. 24 // Fredric J Harris.
25 // The low-pass filter prototype has these characteristics: 25 // The low-pass filter prototype has these characteristics:
26 // * Pass-band ripple = 0.3dB 26 // * Pass-band ripple = 0.3dB
27 // * Pass-band frequency = 0.147 (7kHz at 48kHz) 27 // * Pass-band frequency = 0.147 (7kHz at 48kHz)
28 // * Stop-band attenuation = 40dB 28 // * Stop-band attenuation = 40dB
(...skipping 30 matching lines...) Expand all
59 std::vector<float> in_buffer_; 59 std::vector<float> in_buffer_;
60 std::vector<float> out_buffer_; 60 std::vector<float> out_buffer_;
61 ScopedVector<SparseFIRFilter> analysis_filters_; 61 ScopedVector<SparseFIRFilter> analysis_filters_;
62 ScopedVector<SparseFIRFilter> synthesis_filters_; 62 ScopedVector<SparseFIRFilter> synthesis_filters_;
63 std::vector<std::vector<float>> dct_modulation_; 63 std::vector<std::vector<float>> dct_modulation_;
64 }; 64 };
65 65
66 } // namespace webrtc 66 } // namespace webrtc
67 67
68 #endif // WEBRTC_MODULES_AUDIO_PROCESSING_THREE_BAND_FILTER_BANK_H_ 68 #endif // WEBRTC_MODULES_AUDIO_PROCESSING_THREE_BAND_FILTER_BANK_H_
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