vf_framestep.c File Reference

#include "libavutil/opt.h"
#include "avfilter.h"
#include "internal.h"
#include "video.h"

Go to the source code of this file.

Data Structures
struct	NullContext

Macros
#define	OFFSET(x)   offsetof(FrameStepContext, x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Functions
	AVFILTER_DEFINE_CLASS (framestep)
static int	config_output_props (AVFilterLink *outlink)
static int	filter_frame (AVFilterLink *inlink, AVFrame *ref)

Variables
static const AVOption	framestep_options []
static const AVFilterPad	framestep_inputs []
static const AVFilterPad	framestep_outputs []
const AVFilter	ff_vf_framestep

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(FrameStepContext, x)

Definition at line 36 of file vf_framestep.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 37 of file vf_framestep.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

framestep

)

config_output_props()

static int config_output_props ( AVFilterLink *  outlink )

static

Definition at line 46 of file vf_framestep.c.

filter_frame()

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

static

Definition at line 62 of file vf_framestep.c.

Variable Documentation

framestep_options

const AVOption framestep_options[]

static

Initial value:

= {
    { "step", "set frame step",  OFFSET(frame_step), AV_OPT_TYPE_INT, {.i64=1}, 1, INT_MAX, FLAGS},
    { NULL },
}

Definition at line 39 of file vf_framestep.c.

framestep_inputs

const AVFilterPad framestep_inputs[]

static

Initial value:

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

Definition at line 74 of file vf_framestep.c.

framestep_outputs

const AVFilterPad framestep_outputs[]

static

Initial value:

= {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_VIDEO,
        .config_props = config_output_props,
    },
}

Definition at line 82 of file vf_framestep.c.

ff_vf_framestep

const AVFilter ff_vf_framestep

Initial value:

= {
    .name        = "framestep",
    .description = NULL_IF_CONFIG_SMALL("Select one frame every N frames."),
    .priv_size   = sizeof(FrameStepContext),
    .priv_class  = &framestep_class,
    FILTER_INPUTS(framestep_inputs),
    FILTER_OUTPUTS(framestep_outputs),
    .flags       = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_METADATA_ONLY,
}

Definition at line 90 of file vf_framestep.c.