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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 "internal.h"

Go to the source code of this file.

Data Structures

struct  APadContext
 

Macros

#define OFFSET(x)   offsetof(APadContext, 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, const char *args)
 
static int filter_frame (AVFilterLink *inlink, AVFilterBufferRef *frame)
 
static int request_frame (AVFilterLink *outlink)
 

Variables

static const AVOption apad_options []
 
static const AVFilterPad apad_inputs []
 
static const AVFilterPad apad_outputs []
 
AVFilter avfilter_af_apad
 

Detailed Description

audio pad filter.

Based on af_aresample.c

Definition in file af_apad.c.

Macro Definition Documentation

#define OFFSET (   x)    offsetof(APadContext, x)

Definition at line 47 of file af_apad.c.

Definition at line 48 of file af_apad.c.

Function Documentation

AVFILTER_DEFINE_CLASS ( apad  )
static av_cold int init ( AVFilterContext ctx,
const char *  args 
)
static

Definition at line 59 of file af_apad.c.

static int filter_frame ( AVFilterLink inlink,
AVFilterBufferRef frame 
)
static

Definition at line 80 of file af_apad.c.

static int request_frame ( AVFilterLink outlink)
static

Definition at line 92 of file af_apad.c.

Variable Documentation

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", "number of samples of silence to add", OFFSET(pad_len), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, A },
{ "whole_len", "target number of samples in the audio stream", OFFSET(whole_len), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, A },
{ NULL },
}

Definition at line 50 of file af_apad.c.

const AVFilterPad apad_inputs[]
static
Initial value:
= {
{
.name = "default",
.filter_frame = filter_frame,
.min_perms = AV_PERM_READ,
},
{ NULL },
}

Definition at line 137 of file af_apad.c.

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

Definition at line 147 of file af_apad.c.

AVFilter avfilter_af_apad
Initial value:
= {
.name = "apad",
.description = NULL_IF_CONFIG_SMALL("Pad audio with silence."),
.init = init,
.priv_size = sizeof(APadContext),
.priv_class = &apad_class,
}

Definition at line 156 of file af_apad.c.