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.

#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

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",
        .type             = AVMEDIA_TYPE_VIDEO,
        .get_video_buffer = ff_null_get_video_buffer,
        .config_props     = config_input,
        .filter_frame     = filter_frame,
        .min_perms        = AV_PERM_READ | AV_PERM_PRESERVE,
    },
    { NULL }
}

Definition at line 234 of file vf_decimate.c.

const AVFilterPad decimate_outputs[]

static

Initial value:

= {
    {
        .name          = "default",
        .type          = AVMEDIA_TYPE_VIDEO,
        .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),
    .query_formats = query_formats,
    .inputs        = decimate_inputs,
    .outputs       = decimate_outputs,
    .priv_class    = &decimate_class,
}

Definition at line 255 of file vf_decimate.c.