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af_asetnsamples.c File Reference

Filter that changes number of samples on single output operation. More...

#include "libavutil/audio_fifo.h"
#include "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "audio.h"
#include "internal.h"
#include "formats.h"

Go to the source code of this file.

Data Structures

struct  ASNSContext
 

Macros

#define OFFSET(x)   offsetof(ASNSContext, x)
 
#define FLAGS   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
 

Functions

 AVFILTER_DEFINE_CLASS (asetnsamples)
 
static av_cold int init (AVFilterContext *ctx, const char *args)
 
static av_cold void uninit (AVFilterContext *ctx)
 
static int config_props_output (AVFilterLink *outlink)
 
static int push_samples (AVFilterLink *outlink)
 
static int filter_frame (AVFilterLink *inlink, AVFilterBufferRef *insamples)
 
static int request_frame (AVFilterLink *outlink)
 

Variables

static const AVOption asetnsamples_options []
 
static const AVFilterPad asetnsamples_inputs []
 
static const AVFilterPad asetnsamples_outputs []
 
AVFilter avfilter_af_asetnsamples
 

Detailed Description

Filter that changes number of samples on single output operation.

Definition in file af_asetnsamples.c.

Macro Definition Documentation

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

Definition at line 45 of file af_asetnsamples.c.

Definition at line 46 of file af_asetnsamples.c.

Function Documentation

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

Definition at line 58 of file af_asetnsamples.c.

static av_cold void uninit ( AVFilterContext ctx)
static

Definition at line 75 of file af_asetnsamples.c.

static int config_props_output ( AVFilterLink outlink)
static

Definition at line 81 of file af_asetnsamples.c.

static int push_samples ( AVFilterLink outlink)
static

Definition at line 93 of file af_asetnsamples.c.

Referenced by filter_frame(), and request_frame().

static int filter_frame ( AVFilterLink inlink,
AVFilterBufferRef insamples 
)
static

Definition at line 133 of file af_asetnsamples.c.

static int request_frame ( AVFilterLink outlink)
static

Definition at line 160 of file af_asetnsamples.c.

Variable Documentation

const AVOption asetnsamples_options[]
static
Initial value:
= {
{ "pad", "pad last frame with zeros", OFFSET(pad), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, FLAGS },
{ "p", "pad last frame with zeros", OFFSET(pad), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, FLAGS },
{ "nb_out_samples", "set the number of per-frame output samples", OFFSET(nb_out_samples), AV_OPT_TYPE_INT, {.i64=1024}, 1, INT_MAX, FLAGS },
{ "n", "set the number of per-frame output samples", OFFSET(nb_out_samples), AV_OPT_TYPE_INT, {.i64=1024}, 1, INT_MAX, FLAGS },
{ NULL }
}

Definition at line 48 of file af_asetnsamples.c.

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

Definition at line 178 of file af_asetnsamples.c.

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

Definition at line 188 of file af_asetnsamples.c.

AVFilter avfilter_af_asetnsamples
Initial value:
= {
.name = "asetnsamples",
.description = NULL_IF_CONFIG_SMALL("Set the number of samples for each output audio frames."),
.priv_size = sizeof(ASNSContext),
.init = init,
.priv_class = &asetnsamples_class,
}

Definition at line 198 of file af_asetnsamples.c.