libavfilter/af_earwax.c File Reference

Stereo Widening Effect. More...

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

Go to the source code of this file.

Data Structures

struct  EarwaxContext


#define NUMTAPS   64


static int query_formats (AVFilterContext *ctx)
static int config_input (AVFilterLink *inlink)
static int16_tscalarproduct (const int16_t *in, const int16_t *endin, int16_t *out)
static int filter_samples (AVFilterLink *inlink, AVFilterBufferRef *insamples)


static const int8_t filt [NUMTAPS]
AVFilter avfilter_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.

Define Documentation

#define NUMTAPS   64

Definition at line 37 of file af_earwax.c.

Referenced by filter_samples(), and scalarproduct().

Function Documentation

static int config_input ( AVFilterLink inlink  )  [static]

Definition at line 94 of file af_earwax.c.

Referenced by command().

static int filter_samples ( AVFilterLink inlink,
AVFilterBufferRef insamples 
) [static]

Definition at line 123 of file af_earwax.c.

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 
) [inline, static]

Definition at line 106 of file af_earwax.c.

Referenced by filter_samples().

Variable Documentation

Initial value:

    .name           = "earwax",
    .description    = NULL_IF_CONFIG_SMALL("Widen the stereo image."),
    .query_formats  = query_formats,
    .priv_size      = sizeof(EarwaxContext),
    .inputs  = (const AVFilterPad[])  {{  .name     = "default",
                                    .type           = AVMEDIA_TYPE_AUDIO,
                                    .filter_samples = filter_samples,
                                    .config_props   = config_input,
                                    .min_perms      = AV_PERM_READ, },
                                 {  .name = NULL}},

    .outputs = (const AVFilterPad[])  {{  .name     = "default",
                                    .type           = AVMEDIA_TYPE_AUDIO, },
                                 {  .name = NULL}},

Definition at line 154 of file af_earwax.c.

const int8_t filt[NUMTAPS] [static]

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