af_silencedetect.c File Reference

Audio silence detector. More...

#include <float.h>
#include "libavutil/opt.h"
#include "libavutil/timestamp.h"
#include "audio.h"
#include "formats.h"
#include "avfilter.h"
#include "internal.h"

Classes
struct	SilenceDetectContext

Macros
#define	OFFSET(x)   offsetof(SilenceDetectContext, x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM
#define	SILENCE_DETECT(name, type)

Typedefs
typedef struct SilenceDetectContext	SilenceDetectContext

Functions
	AVFILTER_DEFINE_CLASS (silencedetect)

Variables
AVFilter	ff_af_silencedetect

Detailed Description

Audio silence detector.

Macro Definition Documentation

SILENCE_DETECT

#define SILENCE_DETECT	(		name,
			type
	)

Value:

static void silencedetect_##name(SilenceDetectContext *s, AVFrame *insamples,    \
                                 int nb_samples, int64_t nb_samples_notify,      \
                                 AVRational time_base)                           \
{                                                                                \
    const type *p = (const type *)insamples->data[0];                            \
    const type noise = s->noise;                                                 \
    int i;                                                                       \
                                                                                 \
    for (i = 0; i < nb_samples; i++, p++)                                        \
        update(s, insamples, *p < noise && *p > -noise, i,                       \
               nb_samples_notify, time_base);                                    \
}

Variable Documentation

ff_af_silencedetect

AVFilter ff_af_silencedetect

Initial value:

= {
    .name          = "silencedetect",
    .description   = NULL_IF_CONFIG_SMALL("Detect silence."),
    .priv_size     = sizeof(SilenceDetectContext),
    .query_formats = query_formats,
    .uninit        = uninit,
    .inputs        = silencedetect_inputs,
    .outputs       = silencedetect_outputs,
    .priv_class    = &silencedetect_class,
}