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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 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 (SilenceRemoveContext *s, 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.

Definition at line 81 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 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 ( SilenceRemoveContext s,
AVFrame out,
AVFilterLink outlink,
int nb_samples_written,
int ret 
)
static

Definition at line 229 of file af_silenceremove.c.

Referenced by filter_frame().

static int filter_frame ( AVFilterLink inlink,
AVFrame in 
)
static

Definition at line 248 of file af_silenceremove.c.

static int request_frame ( AVFilterLink outlink)
static

Definition at line 456 of file af_silenceremove.c.

static int query_formats ( AVFilterContext ctx)
static

Definition at line 488 of file af_silenceremove.c.

static av_cold void uninit ( AVFilterContext ctx)
static

Definition at line 517 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 }
}
#define NULL
Definition: coverity.c:32
#define FLAGS
#define OFFSET(x)

Definition at line 82 of file af_silenceremove.c.

const AVFilterPad silenceremove_inputs[]
static
Initial value:
= {
{
.name = "default",
.config_props = config_input,
.filter_frame = filter_frame,
},
{ NULL }
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
#define NULL
Definition: coverity.c:32
static int config_input(AVFilterLink *inlink)

Definition at line 526 of file af_silenceremove.c.

const AVFilterPad silenceremove_outputs[]
static
Initial value:
= {
{
.name = "default",
.request_frame = request_frame,
},
{ NULL }
}
#define NULL
Definition: coverity.c:32
static int request_frame(AVFilterLink *outlink)

Definition at line 536 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,
}
static const AVFilterPad silenceremove_outputs[]
static av_cold int init(AVFilterContext *ctx)
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
static int query_formats(AVFilterContext *ctx)
static const AVFilterPad silenceremove_inputs[]
static const AVFilterPad inputs[]
Definition: af_acontrast.c:193
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
static av_cold void uninit(AVFilterContext *ctx)

Definition at line 545 of file af_silenceremove.c.