vf_photosensitivity.c File Reference

#include <float.h>
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.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)   offsetof(PhotosensitivityContext, 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	query_formats (AVFilterContext *ctx)
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 []
static const AVFilterPad	outputs []
AVFilter	ff_vf_photosensitivity

Macro Definition Documentation

#define MAX_FRAMES   240

Definition at line 32 of file vf_photosensitivity.c.

#define GRID_SIZE   8

Definition at line 33 of file vf_photosensitivity.c.

Referenced by config_input(), convert_frame_partial(), and get_badness().

#define NUM_CHANNELS   3

Definition at line 34 of file vf_photosensitivity.c.

Referenced by convert_frame_partial(), and get_badness().

#define OFFSET

(

x

)

offsetof(PhotosensitivityContext, x)

Definition at line 58 of file vf_photosensitivity.c.

#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 59 of file vf_photosensitivity.c.

#define NUM_CELLS   (GRID_SIZE * GRID_SIZE)

Definition at line 93 of file vf_photosensitivity.c.

Referenced by convert_frame(), and convert_frame_partial().

Function Documentation

AVFILTER_DEFINE_CLASS

(

photosensitivity

)

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 73 of file vf_photosensitivity.c.

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

static

Definition at line 95 of file vf_photosensitivity.c.

Referenced by convert_frame().

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

static

Definition at line 143 of file vf_photosensitivity.c.

Referenced by filter_frame().

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

static

Definition at line 159 of file vf_photosensitivity.c.

Referenced by blend_frame().

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

static

Definition at line 182 of file vf_photosensitivity.c.

Referenced by filter_frame().

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

static

Definition at line 191 of file vf_photosensitivity.c.

Referenced by filter_frame().

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 207 of file vf_photosensitivity.c.

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

static

Definition at line 218 of file vf_photosensitivity.c.

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 307 of file vf_photosensitivity.c.

Variable Documentation

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 },
    { NULL }
}

Definition at line 61 of file vf_photosensitivity.c.

const AVFilterPad inputs[]

static

Initial value:

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

Definition at line 314 of file vf_photosensitivity.c.

const AVFilterPad outputs[]

static

Initial value:

= {
    {
        .name          = "default",
        .type          = AVMEDIA_TYPE_VIDEO,
    },
    { NULL }
}

Definition at line 324 of file vf_photosensitivity.c.

AVFilter ff_vf_photosensitivity

Initial value:

= {
    .name          = "photosensitivity",
    .description   = NULL_IF_CONFIG_SMALL("Filter out photosensitive epilepsy seizure-inducing flashes."),
    .priv_size     = sizeof(PhotosensitivityContext),
    .priv_class    = &photosensitivity_class,
    .uninit        = uninit,
    .query_formats = query_formats,
    .inputs        = inputs,
    .outputs       = outputs,
}

Definition at line 332 of file vf_photosensitivity.c.