1 /*
2  * audio resampling
3  * Copyright (c) 2004-2012 Michael Niedermayer <michaelni@gmx.at>
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg 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  * FFmpeg 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 FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #ifndef SWRESAMPLE_RESAMPLE_H
23 #define SWRESAMPLE_RESAMPLE_H
24 
25 #include "libavutil/log.h"
26 #include "libavutil/samplefmt.h"
27 
28 #include "swresample_internal.h"
29 
30 typedef struct ResampleContext {
31     const AVClass *av_class;
32     uint8_t *filter_bank;
33     int filter_length;
34     int filter_alloc;
35     int ideal_dst_incr;
36     int dst_incr;
37     int dst_incr_div;
38     int dst_incr_mod;
39     int index;
40     int frac;
41     int src_incr;
42     int compensation_distance;
43     int phase_shift;
44     int phase_mask;
45     int linear;
46     enum SwrFilterType filter_type;
47     int kaiser_beta;
48     double factor;
49     enum AVSampleFormat format;
50     int felem_size;
51     int filter_shift;
52 
53     struct {
54         void (*resample_one)(void *dst, const void *src,
55                              int n, int64_t index, int64_t incr);
56         int (*resample)(struct ResampleContext *c, void *dst,
57                         const void *src, int n, int update_ctx);
58     } dsp;
59 } ResampleContext;
60 
61 void swri_resample_dsp_init(ResampleContext *c);
62 void swri_resample_dsp_x86_init(ResampleContext *c);
63 
64 #endif /* SWRESAMPLE_RESAMPLE_H */
65