1 /*
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_
33