vf_photosensitivity.c File Reference

#include <float.h>
#include "libavutil/opt.h"
#include "avfilter.h"
#include "filters.h"
#include "video.h"

Go to the source code of this file.

Data Structures
struct	PhotosensitivityFrame
struct	PhotosensitivityContext
struct	ThreadData_convert_frame
struct	ThreadData_blend_frame

Macros
#define	MAX_FRAMES   240
#define	GRID_SIZE   8
#define	NUM_CHANNELS   3
#define	OFFSET(x)
#define	FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
#define	NUM_CELLS   (GRID_SIZE * GRID_SIZE)

Functions
	AVFILTER_DEFINE_CLASS (photosensitivity)
static int	convert_frame_partial (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static void	convert_frame (AVFilterContext *ctx, AVFrame *in, PhotosensitivityFrame *out, int skip)
static int	blend_frame_partial (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static void	blend_frame (AVFilterContext *ctx, AVFrame *target, AVFrame *source, float factor)
static int	get_badness (PhotosensitivityFrame *a, PhotosensitivityFrame *b)
static int	config_input (AVFilterLink *inlink)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
static av_cold void	uninit (AVFilterContext *ctx)

Variables
static const AVOption	photosensitivity_options []
static const AVFilterPad	inputs []
const FFFilter	ff_vf_photosensitivity

Macro Definition Documentation

MAX_FRAMES

#define MAX_FRAMES   240

Definition at line 29 of file vf_photosensitivity.c.

GRID_SIZE

#define GRID_SIZE   8

Definition at line 30 of file vf_photosensitivity.c.

NUM_CHANNELS

#define NUM_CHANNELS   3

Definition at line 31 of file vf_photosensitivity.c.

Referenced by convert_frame_partial(), and get_badness().

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(PhotosensitivityContext, x)

Definition at line 55 of file vf_photosensitivity.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 56 of file vf_photosensitivity.c.

NUM_CELLS

#define NUM_CELLS   (GRID_SIZE * GRID_SIZE)

Definition at line 78 of file vf_photosensitivity.c.

Referenced by convert_frame(), and convert_frame_partial().

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

photosensitivity

)

convert_frame_partial()

static int convert_frame_partial ( AVFilterContext * ctx, void * arg, int jobnr, int nb_jobs )

static

Definition at line 80 of file vf_photosensitivity.c.

Referenced by convert_frame().

convert_frame()

static void convert_frame ( AVFilterContext * ctx, AVFrame * in, PhotosensitivityFrame * out, int skip )

static

Definition at line 128 of file vf_photosensitivity.c.

Referenced by filter_frame().

blend_frame_partial()

static int blend_frame_partial ( AVFilterContext * ctx, void * arg, int jobnr, int nb_jobs )

static

Definition at line 145 of file vf_photosensitivity.c.

Referenced by blend_frame().

blend_frame()

static void blend_frame ( AVFilterContext * ctx, AVFrame * target, AVFrame * source, float factor )

static

Definition at line 168 of file vf_photosensitivity.c.

Referenced by filter_frame().

get_badness()

static int get_badness ( PhotosensitivityFrame * a, PhotosensitivityFrame * b )

static

Definition at line 178 of file vf_photosensitivity.c.

Referenced by filter_frame().

config_input()

static int config_input ( AVFilterLink * inlink )

static

Definition at line 194 of file vf_photosensitivity.c.

filter_frame()

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

static

Definition at line 205 of file vf_photosensitivity.c.

uninit()

static av_cold void uninit ( AVFilterContext * ctx )

static

Definition at line 302 of file vf_photosensitivity.c.

Variable Documentation

photosensitivity_options

const AVOption photosensitivity_options[]

static

Initial value:

= {
    { "frames",    "set how many frames to use",                          OFFSET(nb_frames),            AV_OPT_TYPE_INT,   {.i64=30}, 2, MAX_FRAMES, FLAGS },
    { "f",         "set how many frames to use",                          OFFSET(nb_frames),            AV_OPT_TYPE_INT,   {.i64=30}, 2, MAX_FRAMES, FLAGS },
    { "threshold", "set detection threshold factor (lower is stricter)",  OFFSET(threshold_multiplier), AV_OPT_TYPE_FLOAT, {.dbl=1},  0.1, FLT_MAX,  FLAGS },
    { "t",         "set detection threshold factor (lower is stricter)",  OFFSET(threshold_multiplier), AV_OPT_TYPE_FLOAT, {.dbl=1},  0.1, FLT_MAX,  FLAGS },
    { "skip",      "set pixels to skip when sampling frames",             OFFSET(skip),                 AV_OPT_TYPE_INT,   {.i64=1},  1, 1024,       FLAGS },
    { "bypass",    "leave frames unchanged",                              OFFSET(bypass),               AV_OPT_TYPE_BOOL,  {.i64=0},  0, 1,          FLAGS },
    { "blend",     "set blending factor (0 always duplicates frames)",    OFFSET(blend_factor),         AV_OPT_TYPE_FLOAT, {.dbl=1},  0, 1,          FLAGS },
    { NULL }
}

Definition at line 58 of file vf_photosensitivity.c.

inputs

const AVFilterPad inputs[]

static

Initial value:

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

Definition at line 309 of file vf_photosensitivity.c.

ff_vf_photosensitivity

const FFFilter ff_vf_photosensitivity

Initial value:

= {
    .p.name        = "photosensitivity",
    .p.description = NULL_IF_CONFIG_SMALL("Filter out photosensitive epilepsy seizure-inducing flashes."),
    .p.priv_class  = &photosensitivity_class,
    .priv_size     = sizeof(PhotosensitivityContext),
    .uninit        = uninit,
    FILTER_INPUTS(inputs),
    FILTER_OUTPUTS(ff_video_default_filterpad),
    FILTER_PIXFMTS(AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24),
}

Definition at line 318 of file vf_photosensitivity.c.