vf_blackdetect.c File Reference

Video black detector, loosely based on blackframe with extended syntax and features. More...

#include <float.h>
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/timestamp.h"
#include "avfilter.h"
#include "filters.h"
#include "formats.h"
#include "video.h"
#include "vf_blackdetect.h"

Go to the source code of this file.

Data Structures
struct	BlackDetectContext

Macros
#define	OFFSET(x)
#define	FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
#define	YUVJ_FORMATS    AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P
#define	YUVA_FORMATS

Functions
	AVFILTER_DEFINE_CLASS (blackdetect)
static int	query_format (const AVFilterContext *ctx, AVFilterFormatsConfig **cfg_in, AVFilterFormatsConfig **cfg_out)
static int	config_input (AVFilterLink *inlink)
static void	check_black_end (AVFilterContext *ctx)
static int	black_counter (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static int	filter_frame (AVFilterLink *inlink, AVFrame *picref)
static av_cold void	uninit (AVFilterContext *ctx)

Variables
static const AVOption	blackdetect_options []
static enum AVPixelFormat	yuvj_formats []
static enum AVPixelFormat	yuva_formats []
static enum AVPixelFormat	yuv_formats []
static const AVFilterPad	blackdetect_inputs []
const FFFilter	ff_vf_blackdetect

Detailed Description

Video black detector, loosely based on blackframe with extended syntax and features.

Definition in file vf_blackdetect.c.

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(BlackDetectContext, x)

Definition at line 61 of file vf_blackdetect.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 62 of file vf_blackdetect.c.

YUVJ_FORMATS

#define YUVJ_FORMATS    AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P

Definition at line 77 of file vf_blackdetect.c.

YUVA_FORMATS

#define YUVA_FORMATS

Value:

    AV_PIX_FMT_YUVA420P,  AV_PIX_FMT_YUVA422P,   AV_PIX_FMT_YUVA444P, \
    AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA444P12, AV_PIX_FMT_YUVA444P16, \
    AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA422P16, \
    AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA420P16

Definition at line 80 of file vf_blackdetect.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

blackdetect

)

query_format()

static int query_format ( const AVFilterContext * ctx, AVFilterFormatsConfig ** cfg_in, AVFilterFormatsConfig ** cfg_out )

static

Definition at line 113 of file vf_blackdetect.c.

config_input()

static int config_input ( AVFilterLink * inlink )

static

Definition at line 127 of file vf_blackdetect.c.

check_black_end()

static void check_black_end ( AVFilterContext * ctx )

static

Definition at line 150 of file vf_blackdetect.c.

Referenced by filter_frame(), and uninit().

black_counter()

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

static

Definition at line 163 of file vf_blackdetect.c.

Referenced by filter_frame().

filter_frame()

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

static

Definition at line 181 of file vf_blackdetect.c.

uninit()

static av_cold void uninit ( AVFilterContext * ctx )

static

Definition at line 233 of file vf_blackdetect.c.

Variable Documentation

blackdetect_options

const AVOption blackdetect_options[]

static

Initial value:

= {
    { "d",                  "set minimum detected black duration in seconds", OFFSET(black_min_duration_time), AV_OPT_TYPE_DOUBLE, {.dbl=2}, 0, DBL_MAX, FLAGS },
    { "black_min_duration", "set minimum detected black duration in seconds", OFFSET(black_min_duration_time), AV_OPT_TYPE_DOUBLE, {.dbl=2}, 0, DBL_MAX, FLAGS },
    { "picture_black_ratio_th", "set the picture black ratio threshold", OFFSET(picture_black_ratio_th), AV_OPT_TYPE_DOUBLE, {.dbl=.98}, 0, 1, FLAGS },
    { "pic_th",                 "set the picture black ratio threshold", OFFSET(picture_black_ratio_th), AV_OPT_TYPE_DOUBLE, {.dbl=.98}, 0, 1, FLAGS },
    { "pixel_black_th", "set the pixel black threshold", OFFSET(pixel_black_th), AV_OPT_TYPE_DOUBLE, {.dbl=.10}, 0, 1, FLAGS },
    { "pix_th",         "set the pixel black threshold", OFFSET(pixel_black_th), AV_OPT_TYPE_DOUBLE, {.dbl=.10}, 0, 1, FLAGS },
    { "alpha",          "check alpha instead of luma", OFFSET(alpha), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
    { NULL }
}

Definition at line 64 of file vf_blackdetect.c.

yuvj_formats

enum AVPixelFormat yuvj_formats[]

static

Initial value:

= {
    YUVJ_FORMATS, AV_PIX_FMT_NONE
}

Definition at line 86 of file vf_blackdetect.c.

Referenced by filter_frame().

yuva_formats

enum AVPixelFormat yuva_formats[]

static

Initial value:

= {
    YUVA_FORMATS, AV_PIX_FMT_NONE
}

Definition at line 90 of file vf_blackdetect.c.

Referenced by query_format().

yuv_formats

enum AVPixelFormat yuv_formats[]

static

Initial value:

= {
    AV_PIX_FMT_GRAY8,
    AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
    AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
    AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
    AV_PIX_FMT_NV12, AV_PIX_FMT_NV21,
    YUVJ_FORMATS,
    AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14,
    AV_PIX_FMT_GRAY16,
    AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
    AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
    AV_PIX_FMT_YUV440P10,
    AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12,
    AV_PIX_FMT_YUV440P12,
    AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14,
    AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
    YUVA_FORMATS, AV_PIX_FMT_NONE
}

Definition at line 94 of file vf_blackdetect.c.

Referenced by query_format().

blackdetect_inputs

const AVFilterPad blackdetect_inputs[]

static

Initial value:

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

Definition at line 246 of file vf_blackdetect.c.

ff_vf_blackdetect

const FFFilter ff_vf_blackdetect

Initial value:

= {
    .p.name        = "blackdetect",
    .p.description = NULL_IF_CONFIG_SMALL("Detect video intervals that are (almost) black."),
    .p.priv_class  = &blackdetect_class,
    .p.flags       = AVFILTER_FLAG_SLICE_THREADS | AVFILTER_FLAG_METADATA_ONLY,
    .priv_size     = sizeof(BlackDetectContext),
    FILTER_INPUTS(blackdetect_inputs),
    FILTER_OUTPUTS(ff_video_default_filterpad),
    FILTER_QUERY_FUNC2(query_format),
    .uninit        = uninit,
}

Definition at line 255 of file vf_blackdetect.c.