Yves Gerey | 665174f | 2018-06-19 15:03:05 +0200 | [diff] [blame] | 1 | /* |
Patrik Höglund | f715c53 | 2017-11-17 11:04:15 +0100 | [diff] [blame] | 2 | * Copyright (c) 2014 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 COMMON_AUDIO_FIR_FILTER_FACTORY_H_ |
| 12 | #define COMMON_AUDIO_FIR_FILTER_FACTORY_H_ |
| 13 | |
| 14 | #include <string.h> |
| 15 | |
| 16 | namespace webrtc { |
| 17 | |
| 18 | class FIRFilter; |
| 19 | |
| 20 | // Creates a filter with the given coefficients. All initial state values will |
| 21 | // be zeros. |
| 22 | // The length of the chunks fed to the filter should never be greater than |
| 23 | // |max_input_length|. This is needed because, when vectorizing it is |
| 24 | // necessary to concatenate the input after the state, and resizing this array |
| 25 | // dynamically is expensive. |
| 26 | FIRFilter* CreateFirFilter(const float* coefficients, |
| 27 | size_t coefficients_length, |
| 28 | size_t max_input_length); |
| 29 | |
| 30 | } // namespace webrtc |
| 31 | |
| 32 | #endif // COMMON_AUDIO_FIR_FILTER_FACTORY_H_ |