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"

Include dependency graph for af_asetnsamples.c:

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)
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, AVFrame *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 FLAGS   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 45 of file af_asetnsamples.c.

#define OFFSET

(

x

)

offsetof(ASNSContext, x)

Definition at line 44 of file af_asetnsamples.c.

Function Documentation

AVFILTER_DEFINE_CLASS

(

asetnsamples

)

static int config_props_output ( AVFilterLink *  outlink )

static

Definition at line 73 of file af_asetnsamples.c.

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

static

Definition at line 128 of file af_asetnsamples.c.

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 57 of file af_asetnsamples.c.

static int push_samples ( AVFilterLink *  outlink )

static

Definition at line 86 of file af_asetnsamples.c.

Referenced by filter_frame(), and request_frame().

static int request_frame ( AVFilterLink *  outlink )

static

Definition at line 155 of file af_asetnsamples.c.

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 67 of file af_asetnsamples.c.

Variable Documentation

const AVFilterPad asetnsamples_inputs[]

static

Initial value:

= {
    {
        .name           = "default",
        .type           = AVMEDIA_TYPE_AUDIO,
        .filter_frame   = filter_frame,
        .needs_writable = 1,
    },
    {  NULL }
}

Definition at line 169 of file af_asetnsamples.c.

const AVOption asetnsamples_options[]

static

Initial value:

= {
    { "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 },
    { "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 },
    { NULL }
}

Definition at line 47 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 179 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 189 of file af_asetnsamples.c.