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.

#define FLAGS   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

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",
        .type         = AVMEDIA_TYPE_AUDIO,
        .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",
        .type          = AVMEDIA_TYPE_AUDIO,
        .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,
    .uninit         = uninit,
    .inputs         = asetnsamples_inputs,
    .outputs        = asetnsamples_outputs,
    .priv_class     = &asetnsamples_class,
}

Definition at line 198 of file af_asetnsamples.c.