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.

#define A   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

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",
        .type         = AVMEDIA_TYPE_AUDIO,
        .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,
        .type          = AVMEDIA_TYPE_AUDIO,
    },
    { 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),
    .inputs        = apad_inputs,
    .outputs       = apad_outputs,
    .priv_class    = &apad_class,
}

Definition at line 156 of file af_apad.c.