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_H_
12 #define COMMON_AUDIO_FIR_FILTER_H_
13 
14 #include <string.h>
15 
16 namespace webrtc {
17 
18 // Finite Impulse Response filter using floating-point arithmetic.
19 class FIRFilter {
20  public:
~FIRFilter()21   virtual ~FIRFilter() {}
22 
23   // Filters the |in| data supplied.
24   // |out| must be previously allocated and it must be at least of |length|.
25   virtual void Filter(const float* in, size_t length, float* out) = 0;
26 };
27 
28 }  // namespace webrtc
29 
30 #endif  // COMMON_AUDIO_FIR_FILTER_H_
31