vf_mpdecimate.c File Reference

#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/pixelutils.h"
#include "libavutil/timestamp.h"
#include "avfilter.h"
#include "filters.h"
#include "video.h"

Go to the source code of this file.

Data Structures
struct	DecimateContext

Macros
#define	OFFSET(x)
#define	FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Enumerations
enum	DecimateResult { DECIMATE_DROP , DECIMATE_KEEP_UPDATE , DECIMATE_KEEP_NO_UPDATE }

Functions
	AVFILTER_DEFINE_CLASS (mpdecimate)
static int	diff_planes (AVFilterContext *ctx, uint8_t *cur, int cur_linesize, uint8_t *ref, int ref_linesize, int w, int h)
	Return 1 if the two planes are different, 0 otherwise.
static int	is_frame_different (AVFilterContext *ctx, AVFrame *cur, AVFrame *ref)
	Tell if the frame is different with respect to the reference frame ref.
static DecimateResult	decimate_frame (AVFilterContext *ctx, AVFrame *cur, AVFrame *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)
static av_cold void	uninit (AVFilterContext *ctx)
static int	config_input (AVFilterLink *inlink)
static int	filter_frame_mode_0 (AVFilterLink *inlink, AVFrame *cur)
static int	filter_frame_mode_1 (AVFilterLink *inlink, AVFrame *cur)
static int	filter_frame (AVFilterLink *inlink, AVFrame *cur)

Variables
static const AVOption	mpdecimate_options []
static enum AVPixelFormat	pix_fmts []
static const AVFilterPad	mpdecimate_inputs []
const FFFilter	ff_vf_mpdecimate

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(DecimateContext, x)

Definition at line 67 of file vf_mpdecimate.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 68 of file vf_mpdecimate.c.

Enumeration Type Documentation

DecimateResult

enum DecimateResult

Enumerator
DECIMATE_DROP	similar frame, past keep threshold — drop it
DECIMATE_KEEP_UPDATE	keep frame and update reference (frame is different, or first frame)
DECIMATE_KEEP_NO_UPDATE	keep frame without updating reference (similar frame under keep threshold, or forced keep due to max_drop_count)

Definition at line 36 of file vf_mpdecimate.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

mpdecimate

)

diff_planes()

static int diff_planes ( AVFilterContext * ctx, uint8_t * cur, int cur_linesize, uint8_t * ref, int ref_linesize, int w, int h )

static

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

Definition at line 89 of file vf_mpdecimate.c.

Referenced by is_frame_different().

is_frame_different()

static int is_frame_different ( AVFilterContext * ctx, AVFrame * cur, AVFrame * ref )

static

Tell if the frame is different with respect to the reference frame ref.

Definition at line 126 of file vf_mpdecimate.c.

Referenced by decimate_frame(), and filter_frame_mode_1().

decimate_frame()

static DecimateResult decimate_frame ( AVFilterContext * ctx, AVFrame * cur, AVFrame * 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 155 of file vf_mpdecimate.c.

Referenced by filter_frame_mode_0().

init()

static av_cold int init ( AVFilterContext * ctx )

static

Definition at line 180 of file vf_mpdecimate.c.

uninit()

static av_cold void uninit ( AVFilterContext * ctx )

static

Definition at line 199 of file vf_mpdecimate.c.

config_input()

static int config_input ( AVFilterLink * inlink )

static

Definition at line 221 of file vf_mpdecimate.c.

filter_frame_mode_0()

static int filter_frame_mode_0 ( AVFilterLink * inlink, AVFrame * cur )

static

Definition at line 232 of file vf_mpdecimate.c.

Referenced by filter_frame().

filter_frame_mode_1()

static int filter_frame_mode_1 ( AVFilterLink * inlink, AVFrame * cur )

static

Definition at line 281 of file vf_mpdecimate.c.

Referenced by filter_frame().

filter_frame()

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

static

Definition at line 325 of file vf_mpdecimate.c.

Variable Documentation

mpdecimate_options

const AVOption mpdecimate_options[]

static

Initial value:

= {
    { "max",  "for mode 0: 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 },
    { "keep", "for mode 0: set the number of similar consecutive frames to be kept before starting to drop similar frames",
      OFFSET(max_keep_count), AV_OPT_TYPE_INT, {.i64=0}, 0, 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 },
    { "mode", "0: drop similar frames, 1: drop similar and unique frames", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS },
    { "min",  "for mode 1: set minimum number of previous frames that need to be duplicated to keep current frame",
      OFFSET(min_dup_count), AV_OPT_TYPE_INT, {.i64=1}, 1, INT_MAX, FLAGS },
    { NULL }
}

Definition at line 70 of file vf_mpdecimate.c.

pix_fmts

enum AVPixelFormat pix_fmts[]

static

Initial value:

= {
    AV_PIX_FMT_YUV444P,      AV_PIX_FMT_YUV422P,
    AV_PIX_FMT_YUV420P,      AV_PIX_FMT_YUV411P,
    AV_PIX_FMT_YUV410P,      AV_PIX_FMT_YUV440P,
    AV_PIX_FMT_YUVJ444P,     AV_PIX_FMT_YUVJ422P,
    AV_PIX_FMT_YUVJ420P,     AV_PIX_FMT_YUVJ440P,
    AV_PIX_FMT_YUVA420P,
 
    AV_PIX_FMT_GBRP,
 
    AV_PIX_FMT_YUVA444P,
    AV_PIX_FMT_YUVA422P,
 
    AV_PIX_FMT_NONE
}

Definition at line 205 of file vf_mpdecimate.c.

mpdecimate_inputs

const AVFilterPad mpdecimate_inputs[]

static

Initial value:

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

Definition at line 331 of file vf_mpdecimate.c.

ff_vf_mpdecimate

const FFFilter ff_vf_mpdecimate

Initial value:

= {
    .p.name        = "mpdecimate",
    .p.description = NULL_IF_CONFIG_SMALL("Remove near-duplicate frames."),
    .p.priv_class  = &mpdecimate_class,
    .init          = init,
    .uninit        = uninit,
    .priv_size     = sizeof(DecimateContext),
    FILTER_INPUTS(mpdecimate_inputs),
    FILTER_OUTPUTS(ff_video_default_filterpad),
    FILTER_PIXFMTS_ARRAY(pix_fmts),
}

Definition at line 340 of file vf_mpdecimate.c.