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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_COMMON_AUDIO_SPARSE_FIR_FILTER_H_ | 11 #ifndef WEBRTC_COMMON_AUDIO_SPARSE_FIR_FILTER_H_ |
12 #define WEBRTC_COMMON_AUDIO_SPARSE_FIR_FILTER_H_ | 12 #define WEBRTC_COMMON_AUDIO_SPARSE_FIR_FILTER_H_ |
13 | 13 |
14 #include <cstring> | 14 #include <cstring> |
15 #include <vector> | 15 #include <vector> |
16 | 16 |
17 #include "webrtc/base/constructormagic.h" | 17 #include "webrtc/rtc_base/constructormagic.h" |
18 | 18 |
19 namespace webrtc { | 19 namespace webrtc { |
20 | 20 |
21 // A Finite Impulse Response filter implementation which takes advantage of a | 21 // A Finite Impulse Response filter implementation which takes advantage of a |
22 // sparse structure with uniformly distributed non-zero coefficients. | 22 // sparse structure with uniformly distributed non-zero coefficients. |
23 class SparseFIRFilter final { | 23 class SparseFIRFilter final { |
24 public: | 24 public: |
25 // |num_nonzero_coeffs| is the number of non-zero coefficients, | 25 // |num_nonzero_coeffs| is the number of non-zero coefficients, |
26 // |nonzero_coeffs|. They are assumed to be uniformly distributed every | 26 // |nonzero_coeffs|. They are assumed to be uniformly distributed every |
27 // |sparsity| samples and with an initial |offset|. The rest of the filter | 27 // |sparsity| samples and with an initial |offset|. The rest of the filter |
(...skipping 16 matching lines...) Expand all Loading... |
44 const size_t offset_; | 44 const size_t offset_; |
45 const std::vector<float> nonzero_coeffs_; | 45 const std::vector<float> nonzero_coeffs_; |
46 std::vector<float> state_; | 46 std::vector<float> state_; |
47 | 47 |
48 RTC_DISALLOW_COPY_AND_ASSIGN(SparseFIRFilter); | 48 RTC_DISALLOW_COPY_AND_ASSIGN(SparseFIRFilter); |
49 }; | 49 }; |
50 | 50 |
51 } // namespace webrtc | 51 } // namespace webrtc |
52 | 52 |
53 #endif // WEBRTC_COMMON_AUDIO_SPARSE_FIR_FILTER_H_ | 53 #endif // WEBRTC_COMMON_AUDIO_SPARSE_FIR_FILTER_H_ |
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