FFmpeg  4.0
resample.h
Go to the documentation of this file.
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;
33  int filter_length;
35  int ideal_dst_incr;
36  int dst_incr;
39  int index;
40  int frac;
41  int src_incr;
44  int linear;
46  double kaiser_beta;
47  double factor;
51  int phase_count_compensation; /* desired phase_count when compensation is enabled */
52 
53  struct {
54  void (*resample_one)(void *dst, const void *src,
55  int n, int64_t index, int64_t incr);
56  int (*resample_common)(struct ResampleContext *c, void *dst,
57  const void *src, int n, int update_ctx);
58  int (*resample_linear)(struct ResampleContext *c, void *dst,
59  const void *src, int n, int update_ctx);
60  } dsp;
62 
67 
68 #endif /* SWRESAMPLE_RESAMPLE_H */
double factor
Definition: resample.h:47
SwrFilterType
Resampling Filter Types.
Definition: swresample.h:166
#define src
Definition: vp8dsp.c:254
int filter_alloc
Definition: resample.h:34
enum AVSampleFormat format
Definition: resample.h:48
uint8_t
int compensation_distance
Definition: resample.h:38
enum AVResampleFilterType filter_type
Definition: resample.h:42
int filter_shift
Definition: resample.h:50
int dst_incr_mod
Definition: resample.h:38
void swri_resample_dsp_x86_init(ResampleContext *c)
Definition: resample_init.c:48
unsigned int index
Definition: resample.h:35
int dst_incr_div
Definition: resample.h:37
struct ResampleContext::@267 dsp
int(* resample_common)(struct ResampleContext *c, void *dst, const void *src, int n, int update_ctx)
Definition: resample.h:56
int n
Definition: avisynth_c.h:684
void swri_resample_dsp_arm_init(ResampleContext *c)
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
typedef void(RENAME(mix_any_func_type))
const AVClass * av_class
Definition: resample.h:31
int filter_length
Definition: resample.h:32
Describe the class of an AVClass context structure.
Definition: log.h:67
void swri_resample_dsp_init(ResampleContext *c)
Definition: resample_dsp.c:46
double kaiser_beta
Definition: resample.h:46
int(* resample_linear)(struct ResampleContext *c, void *dst, const void *src, int n, int update_ctx)
Definition: resample.h:58
int ideal_dst_incr
Definition: resample.h:33
int
static double c[64]
int phase_count_compensation
Definition: resample.h:51
void(* resample_one)(struct ResampleContext *c, void *dst0, int dst_index, const void *src0, unsigned int index, int frac)
Definition: resample.h:45
uint8_t * filter_bank
Definition: resample.h:31
void swri_resample_dsp_aarch64_init(ResampleContext *c)