FFmpeg
Data Structures | Macros | Functions | Variables
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

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",
.filter_frame = filter_frame,
},
}

Definition at line 74 of file vf_framestep.c.

◆ framestep_outputs

const AVFilterPad framestep_outputs[]
static
Initial value:
= {
{
.name = "default",
.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,
}

Definition at line 90 of file vf_framestep.c.

filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *ref)
Definition: vf_framestep.c:62
config_output_props
static int config_output_props(AVFilterLink *outlink)
Definition: vf_framestep.c:46
framestep_inputs
static const AVFilterPad framestep_inputs[]
Definition: vf_framestep.c:74
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: internal.h:190
NULL
#define NULL
Definition: coverity.c:32
OFFSET
#define OFFSET(x)
Definition: vf_framestep.c:36
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:115
framestep_outputs
static const AVFilterPad framestep_outputs[]
Definition: vf_framestep.c:82
AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
#define AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
Some filters support a generic "enable" expression option that can be used to enable or disable a fil...
Definition: avfilter.h:152
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:225
AVFILTER_FLAG_METADATA_ONLY
#define AVFILTER_FLAG_METADATA_ONLY
The filter is a "metadata" filter - it does not modify the frame data in any way.
Definition: avfilter.h:143
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
FLAGS
#define FLAGS
Definition: vf_framestep.c:37
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: internal.h:191