af_earwax.c File Reference

Stereo Widening Effect. More...

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

Go to the source code of this file.

Data Structures
struct	EarwaxContext

Macros
#define	NUMTAPS   64

Functions
static int	query_formats (AVFilterContext *ctx)
static int16_t *	scalarproduct (const int16_t *in, const int16_t *endin, int16_t *out)
static int	filter_frame (AVFilterLink *inlink, AVFrame *insamples)

Variables
static const int8_t	filt [NUMTAPS]
static const AVFilterPad	earwax_inputs []
static const AVFilterPad	earwax_outputs []
AVFilter	ff_af_earwax

Detailed Description

Stereo Widening Effect.

Adds audio cues to move stereo image in front of the listener. Adapted from the libsox earwax effect.

Definition in file af_earwax.c.

Macro Definition Documentation

#define NUMTAPS   64

Definition at line 37 of file af_earwax.c.

Referenced by filter_frame(), and scalarproduct().

Function Documentation

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 78 of file af_earwax.c.

static int16_t* scalarproduct ( const int16_t *  in, const int16_t *  endin, int16_t *  out  )

inlinestatic

Definition at line 95 of file af_earwax.c.

Referenced by filter_frame().

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

static

Definition at line 112 of file af_earwax.c.

Variable Documentation

const int8_t filt[NUMTAPS]

static

Definition at line 39 of file af_earwax.c.

Referenced by apply_tns(), avfilter_insert_filter(), create_filter(), decode_tns(), filter_brng(), filter_tout(), graph_check_validity(), graph_config_links(), and scalarproduct().

const AVFilterPad earwax_inputs[]

static

Initial value:

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

Definition at line 148 of file af_earwax.c.

const AVFilterPad earwax_outputs[]

static

Initial value:

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

Definition at line 157 of file af_earwax.c.

AVFilter ff_af_earwax

Initial value:

= {
    .name           = "earwax",
    .description    = NULL_IF_CONFIG_SMALL("Widen the stereo image."),
    .query_formats  = query_formats,
    .priv_size      = sizeof(EarwaxContext),
    .inputs         = earwax_inputs,
    .outputs        = earwax_outputs,
}

Definition at line 165 of file af_earwax.c.