af_silenceremove.c File Reference

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

Go to the source code of this file.

Data Structures
struct	SilenceRemoveContext

Macros
#define	OFFSET(x)   offsetof(SilenceRemoveContext, x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM

Enumerations
enum	SilenceMode {   SILENCE_TRIM, SILENCE_TRIM_FLUSH, SILENCE_COPY, SILENCE_COPY_FLUSH,   SILENCE_STOP }

Functions
	AVFILTER_DEFINE_CLASS (silenceremove)
static double	compute_peak (SilenceRemoveContext *s, double sample)
static void	update_peak (SilenceRemoveContext *s, double sample)
static double	compute_rms (SilenceRemoveContext *s, double sample)
static void	update_rms (SilenceRemoveContext *s, double sample)
static av_cold int	init (AVFilterContext *ctx)
static void	clear_window (SilenceRemoveContext *s)
static int	config_input (AVFilterLink *inlink)
static void	flush (AVFrame *out, AVFilterLink *outlink, int *nb_samples_written, int *ret)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
static int	request_frame (AVFilterLink *outlink)
static int	query_formats (AVFilterContext *ctx)
static av_cold void	uninit (AVFilterContext *ctx)

Variables
static const AVOption	silenceremove_options []
static const AVFilterPad	silenceremove_inputs []
static const AVFilterPad	silenceremove_outputs []
AVFilter	ff_af_silenceremove

Macro Definition Documentation

#define OFFSET

(

x

)

offsetof(SilenceRemoveContext, x)

Definition at line 80 of file af_silenceremove.c.

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM

Definition at line 81 of file af_silenceremove.c.

Enumeration Type Documentation

enum SilenceMode

Enumerator
SILENCE_TRIM
SILENCE_TRIM_FLUSH
SILENCE_COPY
SILENCE_COPY_FLUSH
SILENCE_STOP

Definition at line 33 of file af_silenceremove.c.

Function Documentation

AVFILTER_DEFINE_CLASS

(

silenceremove

)

static double compute_peak ( SilenceRemoveContext *  s, double  sample  )

static

Definition at line 99 of file af_silenceremove.c.

Referenced by init().

static void update_peak ( SilenceRemoveContext *  s, double  sample  )

static

Definition at line 110 of file af_silenceremove.c.

Referenced by init().

static double compute_rms ( SilenceRemoveContext *  s, double  sample  )

static

Definition at line 121 of file af_silenceremove.c.

Referenced by init().

static void update_rms ( SilenceRemoveContext *  s, double  sample  )

static

Definition at line 132 of file af_silenceremove.c.

Referenced by init().

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 143 of file af_silenceremove.c.

static void clear_window ( SilenceRemoveContext *  s )

static

Definition at line 166 of file af_silenceremove.c.

Referenced by config_input(), and filter_frame().

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 175 of file af_silenceremove.c.

static void flush ( AVFrame *  out, AVFilterLink *  outlink, int *  nb_samples_written, int *  ret  )

static

Definition at line 220 of file af_silenceremove.c.

Referenced by filter_frame().

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

static

Definition at line 232 of file af_silenceremove.c.

static int request_frame ( AVFilterLink *  outlink )

static

Definition at line 423 of file af_silenceremove.c.

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 449 of file af_silenceremove.c.

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 478 of file af_silenceremove.c.

Variable Documentation

const AVOption silenceremove_options[]

static

Initial value:

= {
    { "start_periods",   NULL, OFFSET(start_periods),   AV_OPT_TYPE_INT,      {.i64=0},     0,    9000, FLAGS },
    { "start_duration",  NULL, OFFSET(start_duration),  AV_OPT_TYPE_DURATION, {.i64=0},     0,    9000, FLAGS },
    { "start_threshold", NULL, OFFSET(start_threshold), AV_OPT_TYPE_DOUBLE,   {.dbl=0},     0, DBL_MAX, FLAGS },
    { "stop_periods",    NULL, OFFSET(stop_periods),    AV_OPT_TYPE_INT,      {.i64=0}, -9000,    9000, FLAGS },
    { "stop_duration",   NULL, OFFSET(stop_duration),   AV_OPT_TYPE_DURATION, {.i64=0},     0,    9000, FLAGS },
    { "stop_threshold",  NULL, OFFSET(stop_threshold),  AV_OPT_TYPE_DOUBLE,   {.dbl=0},     0, DBL_MAX, FLAGS },
    { "leave_silence",   NULL, OFFSET(leave_silence),   AV_OPT_TYPE_BOOL,     {.i64=0},     0,       1, FLAGS },
    { "detection",       NULL, OFFSET(detection),       AV_OPT_TYPE_INT,      {.i64=1},     0,       1, FLAGS, "detection" },
    {   "peak",          0,    0,                       AV_OPT_TYPE_CONST,    {.i64=0},     0,       0, FLAGS, "detection" },
    {   "rms",           0,    0,                       AV_OPT_TYPE_CONST,    {.i64=1},     0,       0, FLAGS, "detection" },
    { "window",          NULL, OFFSET(window_ratio),    AV_OPT_TYPE_DOUBLE,   {.dbl=0.02},  0,      10, FLAGS },
    { NULL }
}

Definition at line 82 of file af_silenceremove.c.

const AVFilterPad silenceremove_inputs[]

static

Initial value:

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

Definition at line 487 of file af_silenceremove.c.

const AVFilterPad silenceremove_outputs[]

static

Initial value:

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

Definition at line 497 of file af_silenceremove.c.

AVFilter ff_af_silenceremove

Initial value:

= {
    .name          = "silenceremove",
    .description   = NULL_IF_CONFIG_SMALL("Remove silence."),
    .priv_size     = sizeof(SilenceRemoveContext),
    .priv_class    = &silenceremove_class,
    .init          = init,
    .uninit        = uninit,
    .query_formats = query_formats,
    .inputs        = silenceremove_inputs,
    .outputs       = silenceremove_outputs,
}

Definition at line 506 of file af_silenceremove.c.