af_acontrast.c File Reference

#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "audio.h"
#include "filters.h"

Go to the source code of this file.

Data Structures
struct	AudioContrastContext

Macros
#define	OFFSET(x)
#define	A   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Functions
	AVFILTER_DEFINE_CLASS (acontrast)
static void	filter_flt (void **d, const void **s, int nb_samples, int channels, float contrast)
static void	filter_dbl (void **d, const void **s, int nb_samples, int channels, float contrast)
static void	filter_fltp (void **d, const void **s, int nb_samples, int channels, float contrast)
static void	filter_dblp (void **d, const void **s, int nb_samples, int channels, float contrast)
static int	config_input (AVFilterLink *inlink)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)

Variables
static const AVOption	acontrast_options []
static const AVFilterPad	inputs []
const FFFilter	ff_af_acontrast

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(AudioContrastContext, x)

Definition at line 35 of file af_acontrast.c.

A

#define A   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 36 of file af_acontrast.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

acontrast

)

filter_flt()

static void filter_flt ( void ** d, const void ** s, int nb_samples, int channels, float contrast )

static

Definition at line 45 of file af_acontrast.c.

Referenced by config_input(), and config_input().

filter_dbl()

static void filter_dbl ( void ** d, const void ** s, int nb_samples, int channels, float contrast )

static

Definition at line 65 of file af_acontrast.c.

Referenced by config_input(), and config_input().

filter_fltp()

static void filter_fltp ( void ** d, const void ** s, int nb_samples, int channels, float contrast )

static

Definition at line 85 of file af_acontrast.c.

Referenced by config_input().

filter_dblp()

static void filter_dblp ( void ** d, const void ** s, int nb_samples, int channels, float contrast )

static

Definition at line 103 of file af_acontrast.c.

Referenced by config_input().

config_input()

static int config_input ( AVFilterLink * inlink )

static

Definition at line 121 of file af_acontrast.c.

Referenced by config_input(), config_input(), config_input(), config_input(), config_input(), config_input(), config_input(), config_input(), config_input(), config_input(), config_input(), config_input(), fieldmatch_init(), init(), init(), init(), init(), init(), init(), and init().

filter_frame()

static int filter_frame ( AVFilterLink * inlink, AVFrame * in )

static

Definition at line 136 of file af_acontrast.c.

Variable Documentation

acontrast_options

const AVOption acontrast_options[]

static

Initial value:

= {
    { "contrast", "set contrast", OFFSET(contrast), AV_OPT_TYPE_FLOAT, {.dbl=33}, 0, 100, A },
    { NULL }
}

Definition at line 38 of file af_acontrast.c.

inputs

const AVFilterPad inputs[]

static

Initial value:

= {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_AUDIO,
        .filter_frame = filter_frame,
        .config_props = config_input,
    },
}

Definition at line 163 of file af_acontrast.c.

ff_af_acontrast

const FFFilter ff_af_acontrast

Initial value:

= {
    .p.name         = "acontrast",
    .p.description  = NULL_IF_CONFIG_SMALL("Simple audio dynamic range compression/expansion filter."),
    .p.priv_class   = &acontrast_class,
    .priv_size      = sizeof(AudioContrastContext),
    FILTER_INPUTS(inputs),
    FILTER_OUTPUTS(ff_audio_default_filterpad),
    FILTER_SAMPLEFMTS(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_FLTP,
                      AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_DBLP),
}

Definition at line 172 of file af_acontrast.c.