af_acontrast.c File Reference

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

Go to the source code of this file.

Data Structures
struct	AudioContrastContext

Macros
#define	OFFSET(x)   offsetof(AudioContrastContext, x)
#define	A   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Functions
	AVFILTER_DEFINE_CLASS (acontrast)
static int	query_formats (AVFilterContext *ctx)
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 []
static const AVFilterPad	outputs []
AVFilter	ff_af_acontrast

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

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

)

query_formats()

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 45 of file af_acontrast.c.

filter_flt()

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

static

Definition at line 75 of file af_acontrast.c.

Referenced by config_input().

filter_dbl()

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

static

Definition at line 95 of file af_acontrast.c.

Referenced by config_input().

filter_fltp()

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

static

Definition at line 115 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 133 of file af_acontrast.c.

Referenced by config_input().

config_input()

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 151 of file af_acontrast.c.

filter_frame()

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

static

Definition at line 166 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,
    },
    { NULL }
}

Definition at line 193 of file af_acontrast.c.

outputs

const AVFilterPad outputs[]

static

Initial value:

= {
    {
        .name = "default",
        .type = AVMEDIA_TYPE_AUDIO,
    },
    { NULL }
}

Examples

filtering_audio.c, filtering_video.c, and transcoding.c.

Definition at line 203 of file af_acontrast.c.

Referenced by avfilter_graph_parse(), avfilter_graph_parse2(), configure_filtergraph(), init(), init_complex_filtergraph(), init_filter(), and init_filters().

ff_af_acontrast

AVFilter ff_af_acontrast

Initial value:

= {
    .name           = "acontrast",
    .description    = NULL_IF_CONFIG_SMALL("Simple audio dynamic range compression/expansion filter."),
    .query_formats  = query_formats,
    .priv_size      = sizeof(AudioContrastContext),
    .priv_class     = &acontrast_class,
    .inputs         = inputs,
    .outputs        = outputs,
}

Definition at line 211 of file af_acontrast.c.