vf_random.c File Reference

#include "libavutil/lfg.h"
#include "libavutil/opt.h"
#include "libavutil/random_seed.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"

Go to the source code of this file.

Data Structures
struct	RandomContext

Macros
#define	MAX_FRAMES   512
#define	OFFSET(x)   offsetof(RandomContext, x)
#define	FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Functions
	AVFILTER_DEFINE_CLASS (random)
static av_cold int	init (AVFilterContext *ctx)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
static int	request_frame (AVFilterLink *outlink)

Variables
static const AVOption	random_options []
static const AVFilterPad	random_inputs []
static const AVFilterPad	random_outputs []
AVFilter	ff_vf_random

Macro Definition Documentation

#define MAX_FRAMES   512

Definition at line 29 of file vf_random.c.

#define OFFSET

(

x

)

offsetof(RandomContext, x)

Definition at line 43 of file vf_random.c.

#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 44 of file vf_random.c.

Function Documentation

AVFILTER_DEFINE_CLASS

(

random

)

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 54 of file vf_random.c.

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

static

Definition at line 67 of file vf_random.c.

static int request_frame ( AVFilterLink *  outlink )

static

Definition at line 92 of file vf_random.c.

Variable Documentation

const AVOption random_options[]

static

Initial value:

= {
    { "frames", "set number of frames in cache", OFFSET(nb_frames),   AV_OPT_TYPE_INT,   {.i64=30},  2, MAX_FRAMES, FLAGS },
    { "seed",   "set the seed",                  OFFSET(random_seed), AV_OPT_TYPE_INT64, {.i64=-1}, -1, UINT32_MAX, FLAGS },
    { NULL }
}

Definition at line 46 of file vf_random.c.

const AVFilterPad random_inputs[]

static

Initial value:

= {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_VIDEO,
        .filter_frame = filter_frame,
    },
    { NULL }
}

Definition at line 111 of file vf_random.c.

const AVFilterPad random_outputs[]

static

Initial value:

= {
    {
        .name          = "default",
        .type          = AVMEDIA_TYPE_VIDEO,
        .request_frame = request_frame,
    },
    { NULL }
}

Definition at line 120 of file vf_random.c.

AVFilter ff_vf_random

Initial value:

= {
    .name        = "random",
    .description = NULL_IF_CONFIG_SMALL("Return random frames."),
    .priv_size   = sizeof(RandomContext),
    .priv_class  = &random_class,
    .init        = init,
    .inputs      = random_inputs,
    .outputs     = random_outputs,
}

Definition at line 129 of file vf_random.c.