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
Defines
#define	NUMTAPS   64
Functions
static int	query_formats (AVFilterContext *ctx)
static int	config_input (AVFilterLink *inlink)
static int16_t *	scalarproduct (const int16_t *in, const int16_t *endin, int16_t *out)
static void	filter_samples (AVFilterLink *inlink, AVFilterBufferRef *insamples)
Variables
static const int8_t	filt [NUMTAPS]
AVFilter	avfilter_af_earwax

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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.

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Define Documentation

#define NUMTAPS   64

Definition at line 37 of file af_earwax.c.

Referenced by filter_samples(), and scalarproduct().

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Function Documentation

static int config_input

(

AVFilterLink *

inlink

)

[static]

Definition at line 94 of file af_earwax.c.

Referenced by command().

static void 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

AVFilter avfilter_af_earwax

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 151 of file af_earwax.c.

const int8_t filt[NUMTAPS] [static]

Definition at line 39 of file af_earwax.c.

Referenced by apply_tns(), create_filter(), decode_tns(), ff_avfilter_graph_check_validity(), ff_avfilter_graph_config_links(), put_vp8_epel_h_altivec_core(), put_vp8_epel_v_altivec_core(), and scalarproduct().