af_apad.c File Reference

audio pad filter. More...

#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "libavutil/samplefmt.h"
#include "libavutil/avassert.h"
#include "avfilter.h"
#include "audio.h"
#include "filters.h"

Go to the source code of this file.

Data Structures
struct	APadContext

Macros
#define	OFFSET(x)
#define	A   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Functions
	AVFILTER_DEFINE_CLASS (apad)
static av_cold int	init (AVFilterContext *ctx)
static int	filter_frame (AVFilterLink *inlink, AVFrame *frame)
static int	push_frame (AVFilterLink *outlink)
static int	activate (AVFilterContext *ctx)
static int	config_output (AVFilterLink *outlink)

Variables
static const AVOption	apad_options []
static const AVFilterPad	apad_outputs []
const FFFilter	ff_af_apad

Detailed Description

audio pad filter.

Based on af_aresample.c

Definition in file af_apad.c.

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(APadContext, x)

Definition at line 49 of file af_apad.c.

A

#define A   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 50 of file af_apad.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

apad

)

init()

static av_cold int init ( AVFilterContext * ctx )

static

Definition at line 63 of file af_apad.c.

filter_frame()

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

static

Definition at line 76 of file af_apad.c.

Referenced by activate().

push_frame()

static int push_frame ( AVFilterLink * outlink )

static

Definition at line 91 of file af_apad.c.

Referenced by activate().

activate()

static int activate ( AVFilterContext * ctx )

static

Definition at line 134 of file af_apad.c.

config_output()

static int config_output ( AVFilterLink * outlink )

static

Definition at line 173 of file af_apad.c.

Variable Documentation

apad_options

const AVOption apad_options[]

static

Initial value:

= {
    { "packet_size", "set silence packet size",                                  OFFSET(packet_size), AV_OPT_TYPE_INT,   { .i64 = 4096 }, 0, INT_MAX, A },
    { "pad_len",     "set number of samples of silence to add",                  OFFSET(pad_len),     AV_OPT_TYPE_INT64, { .i64 = -1 }, -1, INT64_MAX, A },
    { "whole_len",   "set minimum target number of samples in the audio stream", OFFSET(whole_len),   AV_OPT_TYPE_INT64, { .i64 = -1 }, -1, INT64_MAX, A },
    { "pad_dur",     "set duration of silence to add",                           OFFSET(pad_dur),     AV_OPT_TYPE_DURATION, { .i64 = -1 }, -1, INT64_MAX, A },
    { "whole_dur",   "set minimum target duration in the audio stream",          OFFSET(whole_dur),   AV_OPT_TYPE_DURATION, { .i64 = -1 }, -1, INT64_MAX, A },
    { NULL }
}

Definition at line 52 of file af_apad.c.

apad_outputs

const AVFilterPad apad_outputs[]

static

Initial value:

= {
    {
        .name          = "default",
        .type          = AVMEDIA_TYPE_AUDIO,
        .config_props  = config_output,
    },
}

Definition at line 189 of file af_apad.c.

ff_af_apad

const FFFilter ff_af_apad

Initial value:

= {
    .p.name        = "apad",
    .p.description = NULL_IF_CONFIG_SMALL("Pad audio with silence."),
    .p.priv_class  = &apad_class,
    .p.flags       = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
    .init          = init,
    .activate      = activate,
    .priv_size     = sizeof(APadContext),
    FILTER_INPUTS(ff_audio_default_filterpad),
    FILTER_OUTPUTS(apad_outputs),
}

Definition at line 197 of file af_apad.c.