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Data Structures | Macros | Functions | Variables
vf_decimate.c File Reference
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/timestamp.h"
#include "libavcodec/dsputil.h"
#include "avfilter.h"
#include "internal.h"
#include "formats.h"
#include "video.h"

Go to the source code of this file.

Data Structures

struct  DecimateContext
 

Macros

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

Functions

 AVFILTER_DEFINE_CLASS (decimate)
 
static int diff_planes (AVFilterContext *ctx, uint8_t *cur, uint8_t *ref, int linesize, int w, int h)
 Return 1 if the two planes are different, 0 otherwise.
 
static int decimate_frame (AVFilterContext *ctx, AVFilterBufferRef *cur, AVFilterBufferRef *ref)
 Tell if the frame should be decimated, for example if it is no much different with respect to the reference frame ref.
 
static av_cold int init (AVFilterContext *ctx, const char *args)
 
static av_cold void uninit (AVFilterContext *ctx)
 
static int query_formats (AVFilterContext *ctx)
 
static int config_input (AVFilterLink *inlink)
 
static int filter_frame (AVFilterLink *inlink, AVFilterBufferRef *cur)
 
static int request_frame (AVFilterLink *outlink)
 

Variables

static const AVOption decimate_options []
 
static const AVFilterPad decimate_inputs []
 
static const AVFilterPad decimate_outputs []
 
AVFilter avfilter_vf_decimate
 

Macro Definition Documentation

#define OFFSET (   x)    offsetof(DecimateContext, x)

Definition at line 55 of file vf_decimate.c.

Definition at line 56 of file vf_decimate.c.

Function Documentation

AVFILTER_DEFINE_CLASS ( decimate  )
static int diff_planes ( AVFilterContext ctx,
uint8_t cur,
uint8_t ref,
int  linesize,
int  w,
int  h 
)
static

Return 1 if the two planes are different, 0 otherwise.

Definition at line 72 of file vf_decimate.c.

Referenced by decimate_frame().

static int decimate_frame ( AVFilterContext ctx,
AVFilterBufferRef cur,
AVFilterBufferRef ref 
)
static

Tell if the frame should be decimated, for example if it is no much different with respect to the reference frame ref.

Definition at line 107 of file vf_decimate.c.

Referenced by filter_frame().

static av_cold int init ( AVFilterContext ctx,
const char *  args 
)
static

Definition at line 132 of file vf_decimate.c.

static av_cold void uninit ( AVFilterContext ctx)
static

Definition at line 155 of file vf_decimate.c.

static int query_formats ( AVFilterContext ctx)
static

Definition at line 164 of file vf_decimate.c.

static int config_input ( AVFilterLink inlink)
static

Definition at line 181 of file vf_decimate.c.

static int filter_frame ( AVFilterLink inlink,
AVFilterBufferRef cur 
)
static

Definition at line 192 of file vf_decimate.c.

static int request_frame ( AVFilterLink outlink)
static

Definition at line 221 of file vf_decimate.c.

Variable Documentation

const AVOption decimate_options[]
static
Initial value:
= {
{ "max", "set the maximum number of consecutive dropped frames (positive), or the minimum interval between dropped frames (negative)",
OFFSET(max_drop_count), AV_OPT_TYPE_INT, {.i64=0}, INT_MIN, INT_MAX, FLAGS },
{ "hi", "set high dropping threshold", OFFSET(hi), AV_OPT_TYPE_INT, {.i64=64*12}, INT_MIN, INT_MAX, FLAGS },
{ "lo", "set low dropping threshold", OFFSET(lo), AV_OPT_TYPE_INT, {.i64=64*5}, INT_MIN, INT_MAX, FLAGS },
{ "frac", "set fraction dropping threshold", OFFSET(frac), AV_OPT_TYPE_FLOAT, {.dbl=0.33}, 0, 1, FLAGS },
{ NULL }
}

Definition at line 58 of file vf_decimate.c.

const AVFilterPad decimate_inputs[]
static
Initial value:
= {
{
.name = "default",
.get_video_buffer = ff_null_get_video_buffer,
.config_props = config_input,
.filter_frame = filter_frame,
},
{ NULL }
}

Definition at line 234 of file vf_decimate.c.

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

Definition at line 246 of file vf_decimate.c.

AVFilter avfilter_vf_decimate
Initial value:
= {
.name = "decimate",
.description = NULL_IF_CONFIG_SMALL("Remove near-duplicate frames."),
.init = init,
.uninit = uninit,
.priv_size = sizeof(DecimateContext),
.priv_class = &decimate_class,
}

Definition at line 255 of file vf_decimate.c.