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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 av_cold int init (AVFilterContext *ctx)
 
static void clear_rms (SilenceRemoveContext *s)
 
static int config_input (AVFilterLink *inlink)
 
static int config_output (AVFilterLink *outlink)
 
static double compute_rms (SilenceRemoveContext *s, double sample)
 
static void update_rms (SilenceRemoveContext *s, double sample)
 
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 75 of file af_silenceremove.c.

Definition at line 76 of file af_silenceremove.c.

Enumeration Type Documentation

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 av_cold int init ( AVFilterContext ctx)
static

Definition at line 90 of file af_silenceremove.c.

static void clear_rms ( SilenceRemoveContext s)
static

Definition at line 102 of file af_silenceremove.c.

Referenced by config_input(), and filter_frame().

static int config_input ( AVFilterLink inlink)
static

Definition at line 111 of file af_silenceremove.c.

static int config_output ( AVFilterLink outlink)
static

Definition at line 156 of file af_silenceremove.c.

static double compute_rms ( SilenceRemoveContext s,
double  sample 
)
static

Definition at line 163 of file af_silenceremove.c.

Referenced by filter_frame().

static void update_rms ( SilenceRemoveContext s,
double  sample 
)
static

Definition at line 174 of file af_silenceremove.c.

Referenced by filter_frame().

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

Definition at line 185 of file af_silenceremove.c.

Referenced by filter_frame().

static int filter_frame ( AVFilterLink inlink,
AVFrame in 
)
static

Definition at line 197 of file af_silenceremove.c.

static int request_frame ( AVFilterLink outlink)
static

Definition at line 388 of file af_silenceremove.c.

static int query_formats ( AVFilterContext ctx)
static

Definition at line 414 of file af_silenceremove.c.

static av_cold void uninit ( AVFilterContext ctx)
static

Definition at line 440 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_INT, {.i64=0}, 0, 1, FLAGS },
{ NULL }
}

Definition at line 77 of file af_silenceremove.c.

const AVFilterPad silenceremove_inputs[]
static
Initial value:
= {
{
.name = "default",
.config_props = config_input,
.filter_frame = filter_frame,
},
{ NULL }
}

Definition at line 449 of file af_silenceremove.c.

const AVFilterPad silenceremove_outputs[]
static
Initial value:
= {
{
.name = "default",
.config_props = config_output,
.request_frame = request_frame,
},
{ NULL }
}

Definition at line 459 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,
}

Definition at line 469 of file af_silenceremove.c.