iirfilter.h
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1 /*
2  * IIR filter
3  * Copyright (c) 2008 Konstantin Shishkov
4  *
5  * This file is part of Libav.
6  *
7  * Libav is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * Libav is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
27 #ifndef AVCODEC_IIRFILTER_H
28 #define AVCODEC_IIRFILTER_H
29 
30 #include "avcodec.h"
31 
32 struct FFIIRFilterCoeffs;
33 struct FFIIRFilterState;
34 
41 };
42 
48 };
49 
65  enum IIRFilterType filt_type,
66  enum IIRFilterMode filt_mode,
67  int order, float cutoff_ratio,
68  float stopband, float ripple);
69 
78 
85 
92 
104 void ff_iir_filter(const struct FFIIRFilterCoeffs *coeffs, struct FFIIRFilterState *state,
105  int size, const int16_t *src, int sstep, int16_t *dst, int dstep);
106 
118 void ff_iir_filter_flt(const struct FFIIRFilterCoeffs *coeffs,
119  struct FFIIRFilterState *state, int size,
120  const float *src, int sstep, float *dst, int dstep);
121 
122 #endif /* AVCODEC_IIRFILTER_H */