FFmpeg: libavfilter/af_volume.h Source File

FFmpeg
af_volume.h
Go to the documentation of this file.
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 <stdint.h>
28 #include "libavutil/eval.h"
29 #include "libavutil/float_dsp.h"
30 #include "libavutil/log.h"
31 #include "libavutil/samplefmt.h"
32 
33  enum PrecisionType {
34   PRECISION_FIXED = 0,
35   PRECISION_FLOAT,
36   PRECISION_DOUBLE,
37 };
38 
39  enum EvalMode {
40   EVAL_MODE_ONCE,
41   EVAL_MODE_FRAME,
42   EVAL_MODE_NB
43 };
44 
45  enum VolumeVarName {
46   VAR_N,
47   VAR_NB_CHANNELS,
48   VAR_NB_CONSUMED_SAMPLES,
49   VAR_NB_SAMPLES,
50   VAR_PTS,
51   VAR_SAMPLE_RATE,
52   VAR_STARTPTS,
53   VAR_STARTT,
54   VAR_T,
55   VAR_TB,
56   VAR_VOLUME,
57   VAR_VARS_NB
58 };
59 
60  enum ReplayGainType {
61   REPLAYGAIN_DROP,
62   REPLAYGAIN_IGNORE,
63   REPLAYGAIN_TRACK,
64   REPLAYGAIN_ALBUM,
65 };
66 
67  typedef struct VolumeContext {
68   const AVClass *class;
69   AVFloatDSPContext *fdsp;
70   int precision;
71   int eval_mode;
72   const char *volume_expr;
73   AVExpr *volume_pexpr;
74   double var_values[VAR_VARS_NB];
75 
76   int replaygain;
77   double replaygain_preamp;
78   int replaygain_noclip;
79   double volume;
80   int volume_i;
81   int channels;
82   int planes;
83   enum AVSampleFormat sample_fmt;
84 
85   void (*scale_samples)(uint8_t *dst, const uint8_t *src, int nb_samples,
86  int volume);
87   int samples_align;
88 } VolumeContext;
89 
90 void ff_volume_init_x86(VolumeContext *vol);
91 
92 #endif /* AVFILTER_VOLUME_H */
PRECISION_FIXED
@ PRECISION_FIXED
Definition: af_volume.h:34
REPLAYGAIN_ALBUM
@ REPLAYGAIN_ALBUM
Definition: af_volume.h:64
PrecisionType
PrecisionType
Definition: af_volume.h:33
VolumeContext::planes
int planes
Definition: af_volume.h:82
VolumeContext
Definition: af_volume.h:67
VAR_NB_CONSUMED_SAMPLES
@ VAR_NB_CONSUMED_SAMPLES
Definition: af_volume.h:48
VolumeVarName
VolumeVarName
Definition: af_volume.h:45
REPLAYGAIN_DROP
@ REPLAYGAIN_DROP
Definition: af_volume.h:61
VAR_TB
@ VAR_TB
Definition: af_volume.h:55
VolumeContext::volume_pexpr
AVExpr * volume_pexpr
Definition: af_volume.h:73
VolumeContext::replaygain_noclip
int replaygain_noclip
Definition: af_volume.h:78
samplefmt.h
VAR_NB_CHANNELS
@ VAR_NB_CHANNELS
Definition: af_volume.h:47
VolumeContext::eval_mode
int eval_mode
Definition: af_volume.h:71
VolumeContext::channels
int channels
Definition: af_volume.h:81
VAR_PTS
@ VAR_PTS
Definition: af_volume.h:50
ReplayGainType
ReplayGainType
Definition: af_volume.h:60
VAR_VARS_NB
@ VAR_VARS_NB
Definition: af_volume.h:57
AVExpr
Definition: eval.c:158
PRECISION_DOUBLE
@ PRECISION_DOUBLE
Definition: af_volume.h:36
VAR_VOLUME
@ VAR_VOLUME
Definition: af_volume.h:56
VolumeContext::volume_expr
const char * volume_expr
Definition: af_volume.h:72
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:76
VolumeContext::var_values
double var_values[VAR_VARS_NB]
Definition: af_volume.h:74
VolumeContext::volume_i
int volume_i
Definition: af_volume.h:80
float_dsp.h
VolumeContext::replaygain_preamp
double replaygain_preamp
Definition: af_volume.h:77
eval.h
dst
uint8_t ptrdiff_t const uint8_t ptrdiff_t int intptr_t intptr_t int int16_t * dst
Definition: dsp.h:87
VolumeContext::replaygain
int replaygain
Definition: af_volume.h:76
REPLAYGAIN_IGNORE
@ REPLAYGAIN_IGNORE
Definition: af_volume.h:62
VAR_NB_SAMPLES
@ VAR_NB_SAMPLES
Definition: af_volume.h:49
AVFloatDSPContext
Definition: float_dsp.h:24
VolumeContext::samples_align
int samples_align
Definition: af_volume.h:87
VolumeContext::scale_samples
void(* scale_samples)(uint8_t *dst, const uint8_t *src, int nb_samples, int volume)
Definition: af_volume.h:85
VolumeContext::volume
double volume
Definition: af_volume.h:79
log.h
VAR_STARTT
@ VAR_STARTT
Definition: af_volume.h:53
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:55
EvalMode
EvalMode
Definition: af_volume.h:39
VAR_N
@ VAR_N
Definition: af_volume.h:46
EVAL_MODE_ONCE
@ EVAL_MODE_ONCE
Definition: af_volume.h:40
EVAL_MODE_NB
@ EVAL_MODE_NB
Definition: af_volume.h:42
VAR_STARTPTS
@ VAR_STARTPTS
Definition: af_volume.h:52
EVAL_MODE_FRAME
@ EVAL_MODE_FRAME
Definition: af_volume.h:41
VolumeContext::precision
int precision
Definition: af_volume.h:70
ff_volume_init_x86
void ff_volume_init_x86(VolumeContext *vol)
Definition: af_volume_init.c:36
VolumeContext::fdsp
AVFloatDSPContext * fdsp
Definition: af_volume.h:69
VolumeContext::sample_fmt
enum AVSampleFormat sample_fmt
Definition: af_volume.h:83
PRECISION_FLOAT
@ PRECISION_FLOAT
Definition: af_volume.h:35
VAR_T
@ VAR_T
Definition: af_volume.h:54
VAR_SAMPLE_RATE
@ VAR_SAMPLE_RATE
Definition: af_volume.h:51
REPLAYGAIN_TRACK
@ REPLAYGAIN_TRACK
Definition: af_volume.h:63
src
#define src
Definition: vp8dsp.c:248

Generated on Sat Oct 18 2025 19:22:56 for FFmpeg by   doxygen 1.8.17

AltStyle によって変換されたページ (->オリジナル) /