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libavfilter
af_volume.h
Go to the documentation of this file.
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/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* audio volume filter
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*/
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#ifndef AVFILTER_AF_VOLUME_H
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#define AVFILTER_AF_VOLUME_H
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#include "
libavutil/common.h
"
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#include "
libavutil/eval.h
"
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#include "
libavutil/float_dsp.h
"
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#include "
libavutil/opt.h
"
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#include "
libavutil/samplefmt.h
"
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enum
PrecisionType
{
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PRECISION_FIXED
= 0,
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PRECISION_FLOAT
,
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PRECISION_DOUBLE
,
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};
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enum
EvalMode
{
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EVAL_MODE_ONCE
,
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EVAL_MODE_FRAME
,
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EVAL_MODE_NB
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};
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enum
VolumeVarName
{
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VAR_N
,
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VAR_NB_CHANNELS
,
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VAR_NB_CONSUMED_SAMPLES
,
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VAR_NB_SAMPLES
,
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VAR_POS
,
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VAR_PTS
,
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VAR_SAMPLE_RATE
,
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VAR_STARTPTS
,
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VAR_STARTT
,
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VAR_T
,
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VAR_TB
,
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VAR_VOLUME
,
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VAR_VARS_NB
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};
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enum
ReplayGainType
{
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REPLAYGAIN_DROP
,
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REPLAYGAIN_IGNORE
,
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REPLAYGAIN_TRACK
,
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REPLAYGAIN_ALBUM
,
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};
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typedef
struct
VolumeContext
{
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const
AVClass
*
class
;
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AVFloatDSPContext
*
fdsp
;
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int
precision
;
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int
eval_mode
;
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const
char
*
volume_expr
;
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AVExpr
*
volume_pexpr
;
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double
var_values
[
VAR_VARS_NB
];
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int
replaygain
;
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double
replaygain_preamp
;
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int
replaygain_noclip
;
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double
volume
;
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int
volume_i
;
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int
channels
;
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int
planes
;
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enum
AVSampleFormat
sample_fmt
;
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void
(*
scale_samples
)(
uint8_t
*dst,
const
uint8_t
*
src
,
int
nb_samples,
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int
volume
);
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int
samples_align
;
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}
VolumeContext
;
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void
ff_volume_init_x86
(
VolumeContext
*vol);
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#endif
/* AVFILTER_AF_VOLUME_H */
VolumeContext::replaygain
int replaygain
Definition:
af_volume.h:77
REPLAYGAIN_TRACK
Definition:
af_volume.h:64
PRECISION_FLOAT
Definition:
af_volume.h:35
VAR_NB_CHANNELS
Definition:
af_volume.h:47
float_dsp.h
VAR_POS
Definition:
af_volume.h:50
VAR_PTS
Definition:
af_volume.h:51
PRECISION_FIXED
Definition:
af_volume.h:34
samplefmt.h
VolumeContext::var_values
double var_values[VAR_VARS_NB]
Definition:
af_volume.h:75
PrecisionType
PrecisionType
Definition:
af_volume.h:33
ReplayGainType
ReplayGainType
Definition:
af_volume.h:61
VolumeContext::volume_i
int volume_i
Definition:
af_volume.h:81
VolumeContext::volume_expr
const char * volume_expr
Definition:
af_volume.h:73
VolumeContext::replaygain_preamp
double replaygain_preamp
Definition:
af_volume.h:78
uint8_t
uint8_t
Definition:
audio_convert.c:194
opt.h
AVOptions.
REPLAYGAIN_DROP
Definition:
af_volume.h:62
AVExpr
Definition:
eval.c:144
VolumeContext::samples_align
int samples_align
Definition:
af_volume.h:88
VolumeContext::scale_samples
void(* scale_samples)(uint8_t *dst, const uint8_t *src, int nb_samples, int volume)
Definition:
af_volume.h:86
PRECISION_DOUBLE
Definition:
af_volume.h:36
VAR_VOLUME
Definition:
af_volume.h:57
VolumeContext::channels
int channels
Definition:
af_volume.h:82
VAR_VARS_NB
Definition:
af_volume.h:58
VolumeContext::precision
int precision
Definition:
af_volume.h:71
VAR_TB
Definition:
af_volume.h:56
VolumeVarName
VolumeVarName
Definition:
af_volume.h:45
VAR_NB_SAMPLES
Definition:
af_volume.h:49
void
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
VolumeContext::replaygain_noclip
int replaygain_noclip
Definition:
af_volume.h:79
AVFloatDSPContext
Definition:
float_dsp.h:24
EvalMode
EvalMode
Definition:
af_volume.h:39
VolumeContext::volume
double volume
Definition:
af_volume.h:80
VolumeContext::sample_fmt
enum AVSampleFormat sample_fmt
Definition:
af_volume.h:84
VolumeContext::fdsp
AVFloatDSPContext * fdsp
Definition:
af_volume.h:70
VolumeContext
Definition:
af_volume.h:68
src
AVS_Value src
Definition:
avisynth_c.h:482
REPLAYGAIN_IGNORE
Definition:
af_volume.h:63
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition:
samplefmt.h:59
AVClass
Describe the class of an AVClass context structure.
Definition:
log.h:67
VAR_N
Definition:
af_volume.h:46
EVAL_MODE_ONCE
Definition:
af_volume.h:40
VolumeContext::volume_pexpr
AVExpr * volume_pexpr
Definition:
af_volume.h:74
VolumeContext::planes
int planes
Definition:
af_volume.h:83
ff_volume_init_x86
void ff_volume_init_x86(VolumeContext *vol)
Definition:
af_volume_init.c:36
common.h
common internal and external API header
VAR_STARTT
Definition:
af_volume.h:54
EVAL_MODE_NB
Definition:
af_volume.h:42
REPLAYGAIN_ALBUM
Definition:
af_volume.h:65
VolumeContext::eval_mode
int eval_mode
Definition:
af_volume.h:72
VAR_SAMPLE_RATE
Definition:
af_volume.h:52
VAR_NB_CONSUMED_SAMPLES
Definition:
af_volume.h:48
VAR_T
Definition:
af_volume.h:55
VAR_STARTPTS
Definition:
af_volume.h:53
EVAL_MODE_FRAME
Definition:
af_volume.h:41
eval.h
simple arithmetic expression evaluator
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