FFmpeg
af_volume.h
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * FFmpeg is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 /**
20  * @file
21  * audio volume filter
22  */
23 
24 #ifndef AVFILTER_VOLUME_H
25 #define AVFILTER_VOLUME_H
26 
27 #include "libavutil/common.h"
28 #include "libavutil/eval.h"
29 #include "libavutil/float_dsp.h"
30 #include "libavutil/opt.h"
31 #include "libavutil/samplefmt.h"
32 
37 };
38 
39 enum EvalMode {
43 };
44 
59 };
60 
66 };
67 
68 typedef struct VolumeContext {
69  const AVClass *class;
71  int precision;
72  int eval_mode;
73  const char *volume_expr;
76 
80  double volume;
81  int volume_i;
82  int channels;
83  int planes;
85 
86  void (*scale_samples)(uint8_t *dst, const uint8_t *src, int nb_samples,
87  int volume);
90 
92 
93 #endif /* AVFILTER_VOLUME_H */
int replaygain
Definition: af_volume.h:77
double var_values[VAR_VARS_NB]
Definition: af_volume.h:75
PrecisionType
Definition: af_volume.h:33
#define src
Definition: vp8dsp.c:254
ReplayGainType
Definition: af_volume.h:61
const char * volume_expr
Definition: af_volume.h:73
double replaygain_preamp
Definition: af_volume.h:78
uint8_t
AVOptions.
Definition: eval.c:157
int samples_align
Definition: af_volume.h:88
VolumeVarName
Definition: af_volume.h:45
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
int replaygain_noclip
Definition: af_volume.h:79
EvalMode
Definition: af_volume.h:39
double volume
Definition: af_volume.h:80
enum AVSampleFormat sample_fmt
Definition: af_volume.h:84
AVFloatDSPContext * fdsp
Definition: af_volume.h:70
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
Describe the class of an AVClass context structure.
Definition: log.h:67
AVExpr * volume_pexpr
Definition: af_volume.h:74
void ff_volume_init_x86(VolumeContext *vol)
common internal and external API header
void(* scale_samples)(uint8_t *dst, const uint8_t *src, int nb_samples, int volume)
Definition: af_volume.h:86
simple arithmetic expression evaluator